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);
1691 DECL_DELETED_FN (newdecl) |= DECL_DELETED_FN (olddecl);
1694 /* Deal with C++: must preserve virtual function table size. */
1695 if (TREE_CODE (olddecl) == TYPE_DECL)
1697 tree newtype = TREE_TYPE (newdecl);
1698 tree oldtype = TREE_TYPE (olddecl);
1700 if (newtype != error_mark_node && oldtype != error_mark_node
1701 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1702 CLASSTYPE_FRIEND_CLASSES (newtype)
1703 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1705 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1708 /* Copy all the DECL_... slots specified in the new decl
1709 except for any that we copy here from the old type. */
1710 DECL_ATTRIBUTES (newdecl)
1711 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1713 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1717 old_result = DECL_TEMPLATE_RESULT (olddecl);
1718 new_result = DECL_TEMPLATE_RESULT (newdecl);
1719 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1720 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1721 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1722 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1724 DECL_ATTRIBUTES (old_result)
1725 = (*targetm.merge_decl_attributes) (old_result, new_result);
1727 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1729 if (GNU_INLINE_P (old_result) != GNU_INLINE_P (new_result)
1730 && DECL_INITIAL (new_result))
1732 if (DECL_INITIAL (old_result))
1733 DECL_UNINLINABLE (old_result) = 1;
1735 DECL_UNINLINABLE (old_result) = DECL_UNINLINABLE (new_result);
1736 DECL_EXTERNAL (old_result) = DECL_EXTERNAL (new_result);
1737 DECL_NOT_REALLY_EXTERN (old_result)
1738 = DECL_NOT_REALLY_EXTERN (new_result);
1739 DECL_INTERFACE_KNOWN (old_result)
1740 = DECL_INTERFACE_KNOWN (new_result);
1741 DECL_DECLARED_INLINE_P (old_result)
1742 = DECL_DECLARED_INLINE_P (new_result);
1743 DECL_DISREGARD_INLINE_LIMITS (old_result)
1744 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1749 DECL_DECLARED_INLINE_P (old_result)
1750 |= DECL_DECLARED_INLINE_P (new_result);
1751 DECL_DISREGARD_INLINE_LIMITS (old_result)
1752 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1753 check_redeclaration_exception_specification (newdecl, olddecl);
1757 /* If the new declaration is a definition, update the file and
1758 line information on the declaration, and also make
1759 the old declaration the same definition. */
1760 if (DECL_INITIAL (new_result) != NULL_TREE)
1762 DECL_SOURCE_LOCATION (olddecl)
1763 = DECL_SOURCE_LOCATION (old_result)
1764 = DECL_SOURCE_LOCATION (newdecl);
1765 DECL_INITIAL (old_result) = DECL_INITIAL (new_result);
1766 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1769 DECL_ARGUMENTS (old_result)
1770 = DECL_ARGUMENTS (new_result);
1771 for (parm = DECL_ARGUMENTS (old_result); parm;
1772 parm = DECL_CHAIN (parm))
1773 DECL_CONTEXT (parm) = old_result;
1782 /* Automatically handles default parameters. */
1783 tree oldtype = TREE_TYPE (olddecl);
1786 /* Merge the data types specified in the two decls. */
1787 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1789 /* If merge_types produces a non-typedef type, just use the old type. */
1790 if (TREE_CODE (newdecl) == TYPE_DECL
1791 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1794 if (TREE_CODE (newdecl) == VAR_DECL)
1796 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1797 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1798 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1799 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1800 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1801 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1803 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1804 if (DECL_LANG_SPECIFIC (olddecl)
1805 && CP_DECL_THREADPRIVATE_P (olddecl))
1807 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1808 if (!DECL_LANG_SPECIFIC (newdecl))
1809 retrofit_lang_decl (newdecl);
1811 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1812 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1816 /* Do this after calling `merge_types' so that default
1817 parameters don't confuse us. */
1818 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1819 check_redeclaration_exception_specification (newdecl, olddecl);
1820 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1822 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1823 check_default_args (newdecl);
1825 /* Lay the type out, unless already done. */
1826 if (! same_type_p (newtype, oldtype)
1827 && TREE_TYPE (newdecl) != error_mark_node
1828 && !(processing_template_decl && uses_template_parms (newdecl)))
1829 layout_type (TREE_TYPE (newdecl));
1831 if ((TREE_CODE (newdecl) == VAR_DECL
1832 || TREE_CODE (newdecl) == PARM_DECL
1833 || TREE_CODE (newdecl) == RESULT_DECL
1834 || TREE_CODE (newdecl) == FIELD_DECL
1835 || TREE_CODE (newdecl) == TYPE_DECL)
1836 && !(processing_template_decl && uses_template_parms (newdecl)))
1837 layout_decl (newdecl, 0);
1839 /* Merge the type qualifiers. */
1840 if (TREE_READONLY (newdecl))
1841 TREE_READONLY (olddecl) = 1;
1842 if (TREE_THIS_VOLATILE (newdecl))
1843 TREE_THIS_VOLATILE (olddecl) = 1;
1844 if (TREE_NOTHROW (newdecl))
1845 TREE_NOTHROW (olddecl) = 1;
1847 /* Merge deprecatedness. */
1848 if (TREE_DEPRECATED (newdecl))
1849 TREE_DEPRECATED (olddecl) = 1;
1851 /* Preserve function specific target and optimization options */
1852 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1854 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl)
1855 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl))
1856 DECL_FUNCTION_SPECIFIC_TARGET (newdecl)
1857 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl);
1859 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl)
1860 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl))
1861 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl)
1862 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl);
1865 /* Merge the initialization information. */
1866 if (DECL_INITIAL (newdecl) == NULL_TREE
1867 && DECL_INITIAL (olddecl) != NULL_TREE)
1869 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1870 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1871 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1873 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1874 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1878 /* Merge the section attribute.
1879 We want to issue an error if the sections conflict but that must be
1880 done later in decl_attributes since we are called before attributes
1882 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1883 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1885 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1887 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1888 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1889 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1890 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1891 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1892 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1893 DECL_IS_OPERATOR_NEW (newdecl) |= DECL_IS_OPERATOR_NEW (olddecl);
1894 DECL_PURE_P (newdecl) |= DECL_PURE_P (olddecl);
1895 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1896 DECL_LOOPING_CONST_OR_PURE_P (newdecl)
1897 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl);
1898 /* Keep the old RTL. */
1899 COPY_DECL_RTL (olddecl, newdecl);
1901 else if (TREE_CODE (newdecl) == VAR_DECL
1902 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1904 /* Keep the old RTL. We cannot keep the old RTL if the old
1905 declaration was for an incomplete object and the new
1906 declaration is not since many attributes of the RTL will
1908 COPY_DECL_RTL (olddecl, newdecl);
1911 /* If cannot merge, then use the new type and qualifiers,
1912 and don't preserve the old rtl. */
1915 /* Clean out any memory we had of the old declaration. */
1916 tree oldstatic = value_member (olddecl, static_aggregates);
1918 TREE_VALUE (oldstatic) = error_mark_node;
1920 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1921 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1922 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1923 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1926 /* Merge the storage class information. */
1927 merge_weak (newdecl, olddecl);
1929 if (DECL_ONE_ONLY (olddecl))
1930 DECL_COMDAT_GROUP (newdecl) = DECL_COMDAT_GROUP (olddecl);
1932 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1933 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1934 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1935 if (! DECL_EXTERNAL (olddecl))
1936 DECL_EXTERNAL (newdecl) = 0;
1938 new_template_info = NULL_TREE;
1939 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1941 bool new_redefines_gnu_inline = false;
1943 if (new_defines_function
1944 && ((DECL_INTERFACE_KNOWN (olddecl)
1945 && TREE_CODE (olddecl) == FUNCTION_DECL)
1946 || (TREE_CODE (olddecl) == TEMPLATE_DECL
1947 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1948 == FUNCTION_DECL))))
1952 if (TREE_CODE (fn) == TEMPLATE_DECL)
1953 fn = DECL_TEMPLATE_RESULT (olddecl);
1955 new_redefines_gnu_inline = GNU_INLINE_P (fn) && DECL_INITIAL (fn);
1958 if (!new_redefines_gnu_inline)
1960 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1961 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1962 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1964 DECL_TEMPLATE_INSTANTIATED (newdecl)
1965 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1966 DECL_ODR_USED (newdecl) |= DECL_ODR_USED (olddecl);
1968 /* If the OLDDECL is an instantiation and/or specialization,
1969 then the NEWDECL must be too. But, it may not yet be marked
1970 as such if the caller has created NEWDECL, but has not yet
1971 figured out that it is a redeclaration. */
1972 if (!DECL_USE_TEMPLATE (newdecl))
1973 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1975 /* Don't really know how much of the language-specific
1976 values we should copy from old to new. */
1977 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1978 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1979 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1980 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1982 if (LANG_DECL_HAS_MIN (newdecl))
1984 DECL_LANG_SPECIFIC (newdecl)->u.min.u2 =
1985 DECL_LANG_SPECIFIC (olddecl)->u.min.u2;
1986 if (DECL_TEMPLATE_INFO (newdecl))
1987 new_template_info = DECL_TEMPLATE_INFO (newdecl);
1988 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1990 /* Only functions have these fields. */
1991 if (TREE_CODE (newdecl) == FUNCTION_DECL
1992 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1994 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1995 olddecl_friend = DECL_FRIEND_P (olddecl);
1996 hidden_friend = (DECL_ANTICIPATED (olddecl)
1997 && DECL_HIDDEN_FRIEND_P (olddecl)
1998 && newdecl_is_friend);
1999 DECL_BEFRIENDING_CLASSES (newdecl)
2000 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
2001 DECL_BEFRIENDING_CLASSES (olddecl));
2002 /* DECL_THUNKS is only valid for virtual functions,
2003 otherwise it is a DECL_FRIEND_CONTEXT. */
2004 if (DECL_VIRTUAL_P (newdecl))
2005 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
2007 /* Only variables have this field. */
2008 else if (TREE_CODE (newdecl) == VAR_DECL
2009 && VAR_HAD_UNKNOWN_BOUND (olddecl))
2010 SET_VAR_HAD_UNKNOWN_BOUND (newdecl);
2013 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2017 /* Merge parameter attributes. */
2018 tree oldarg, newarg;
2019 for (oldarg = DECL_ARGUMENTS(olddecl),
2020 newarg = DECL_ARGUMENTS(newdecl);
2022 oldarg = DECL_CHAIN(oldarg), newarg = DECL_CHAIN(newarg)) {
2023 DECL_ATTRIBUTES (newarg)
2024 = (*targetm.merge_decl_attributes) (oldarg, newarg);
2025 DECL_ATTRIBUTES (oldarg) = DECL_ATTRIBUTES (newarg);
2028 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
2029 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
2031 /* If newdecl is not a specialization, then it is not a
2032 template-related function at all. And that means that we
2033 should have exited above, returning 0. */
2034 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
2036 if (DECL_ODR_USED (olddecl))
2037 /* From [temp.expl.spec]:
2039 If a template, a member template or the member of a class
2040 template is explicitly specialized then that
2041 specialization shall be declared before the first use of
2042 that specialization that would cause an implicit
2043 instantiation to take place, in every translation unit in
2044 which such a use occurs. */
2045 error ("explicit specialization of %qD after first use",
2048 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
2050 /* Don't propagate visibility from the template to the
2051 specialization here. We'll do that in determine_visibility if
2053 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
2055 /* [temp.expl.spec/14] We don't inline explicit specialization
2056 just because the primary template says so. */
2058 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2059 the always_inline attribute. */
2060 if (DECL_DISREGARD_INLINE_LIMITS (olddecl)
2061 && !DECL_DISREGARD_INLINE_LIMITS (newdecl))
2063 if (DECL_DECLARED_INLINE_P (newdecl))
2064 DECL_DISREGARD_INLINE_LIMITS (newdecl) = true;
2066 DECL_ATTRIBUTES (newdecl)
2067 = remove_attribute ("always_inline",
2068 DECL_ATTRIBUTES (newdecl));
2071 else if (new_defines_function && DECL_INITIAL (olddecl))
2073 /* Never inline re-defined extern inline functions.
2074 FIXME: this could be better handled by keeping both
2075 function as separate declarations. */
2076 DECL_UNINLINABLE (newdecl) = 1;
2080 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
2081 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
2083 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
2085 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
2086 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
2088 DECL_DISREGARD_INLINE_LIMITS (newdecl)
2089 = DECL_DISREGARD_INLINE_LIMITS (olddecl)
2090 = (DECL_DISREGARD_INLINE_LIMITS (newdecl)
2091 || DECL_DISREGARD_INLINE_LIMITS (olddecl));
2094 /* Preserve abstractness on cloned [cd]tors. */
2095 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
2097 /* Update newdecl's parms to point at olddecl. */
2098 for (parm = DECL_ARGUMENTS (newdecl); parm;
2099 parm = DECL_CHAIN (parm))
2100 DECL_CONTEXT (parm) = olddecl;
2104 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
2105 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
2106 COPY_DECL_RTL (newdecl, olddecl);
2108 if (! types_match || new_defines_function)
2110 /* These need to be copied so that the names are available.
2111 Note that if the types do match, we'll preserve inline
2112 info and other bits, but if not, we won't. */
2113 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
2114 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
2116 if (new_defines_function)
2117 /* If defining a function declared with other language
2118 linkage, use the previously declared language linkage. */
2119 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
2120 else if (types_match)
2122 /* If redeclaring a builtin function, and not a definition,
2123 it stays built in. */
2124 if (DECL_BUILT_IN (olddecl))
2126 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
2127 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
2128 /* If we're keeping the built-in definition, keep the rtl,
2129 regardless of declaration matches. */
2130 COPY_DECL_RTL (olddecl, newdecl);
2133 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
2134 /* Don't clear out the arguments if we're just redeclaring a
2136 if (DECL_ARGUMENTS (olddecl))
2137 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
2140 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
2141 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
2143 /* Now preserve various other info from the definition. */
2144 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
2145 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
2146 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
2147 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
2149 /* Warn about conflicting visibility specifications. */
2150 if (DECL_VISIBILITY_SPECIFIED (olddecl)
2151 && DECL_VISIBILITY_SPECIFIED (newdecl)
2152 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
2154 warning_at (input_location, OPT_Wattributes,
2155 "%q+D: visibility attribute ignored because it", newdecl);
2156 warning_at (DECL_SOURCE_LOCATION (olddecl), OPT_Wattributes,
2157 "conflicts with previous declaration here");
2159 /* Choose the declaration which specified visibility. */
2160 if (DECL_VISIBILITY_SPECIFIED (olddecl))
2162 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
2163 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
2165 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2166 so keep this behavior. */
2167 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
2169 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
2170 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
2172 /* Likewise for DECL_USER_ALIGN and DECL_PACKED. */
2173 DECL_USER_ALIGN (olddecl) = DECL_USER_ALIGN (newdecl);
2174 if (TREE_CODE (newdecl) == FIELD_DECL)
2175 DECL_PACKED (olddecl) = DECL_PACKED (newdecl);
2177 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2178 with that from NEWDECL below. */
2179 if (DECL_LANG_SPECIFIC (olddecl))
2181 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
2182 != DECL_LANG_SPECIFIC (newdecl));
2183 ggc_free (DECL_LANG_SPECIFIC (olddecl));
2186 /* Merge the USED information. */
2187 if (TREE_USED (olddecl))
2188 TREE_USED (newdecl) = 1;
2189 else if (TREE_USED (newdecl))
2190 TREE_USED (olddecl) = 1;
2191 if (TREE_CODE (newdecl) == VAR_DECL)
2193 if (DECL_READ_P (olddecl))
2194 DECL_READ_P (newdecl) = 1;
2195 else if (DECL_READ_P (newdecl))
2196 DECL_READ_P (olddecl) = 1;
2198 if (DECL_PRESERVE_P (olddecl))
2199 DECL_PRESERVE_P (newdecl) = 1;
2200 else if (DECL_PRESERVE_P (newdecl))
2201 DECL_PRESERVE_P (olddecl) = 1;
2203 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2207 function_size = sizeof (struct tree_decl_common);
2209 memcpy ((char *) olddecl + sizeof (struct tree_common),
2210 (char *) newdecl + sizeof (struct tree_common),
2211 function_size - sizeof (struct tree_common));
2213 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2214 (char *) newdecl + sizeof (struct tree_decl_common),
2215 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
2216 if (new_template_info)
2217 /* If newdecl is a template instantiation, it is possible that
2218 the following sequence of events has occurred:
2220 o A friend function was declared in a class template. The
2221 class template was instantiated.
2223 o The instantiation of the friend declaration was
2224 recorded on the instantiation list, and is newdecl.
2226 o Later, however, instantiate_class_template called pushdecl
2227 on the newdecl to perform name injection. But, pushdecl in
2228 turn called duplicate_decls when it discovered that another
2229 declaration of a global function with the same name already
2232 o Here, in duplicate_decls, we decided to clobber newdecl.
2234 If we're going to do that, we'd better make sure that
2235 olddecl, and not newdecl, is on the list of
2236 instantiations so that if we try to do the instantiation
2237 again we won't get the clobbered declaration. */
2238 reregister_specialization (newdecl,
2244 size_t size = tree_code_size (TREE_CODE (olddecl));
2245 memcpy ((char *) olddecl + sizeof (struct tree_common),
2246 (char *) newdecl + sizeof (struct tree_common),
2247 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2248 switch (TREE_CODE (olddecl))
2258 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2259 (char *) newdecl + sizeof (struct tree_decl_common),
2260 size - sizeof (struct tree_decl_common)
2261 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2265 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2266 (char *) newdecl + sizeof (struct tree_decl_common),
2267 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2268 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2272 DECL_UID (olddecl) = olddecl_uid;
2274 DECL_FRIEND_P (olddecl) = 1;
2277 DECL_ANTICIPATED (olddecl) = 1;
2278 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2281 /* NEWDECL contains the merged attribute lists.
2282 Update OLDDECL to be the same. */
2283 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2285 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2286 so that encode_section_info has a chance to look at the new decl
2287 flags and attributes. */
2288 if (DECL_RTL_SET_P (olddecl)
2289 && (TREE_CODE (olddecl) == FUNCTION_DECL
2290 || (TREE_CODE (olddecl) == VAR_DECL
2291 && TREE_STATIC (olddecl))))
2292 make_decl_rtl (olddecl);
2294 /* The NEWDECL will no longer be needed. Because every out-of-class
2295 declaration of a member results in a call to duplicate_decls,
2296 freeing these nodes represents in a significant savings. */
2302 /* Return zero if the declaration NEWDECL is valid
2303 when the declaration OLDDECL (assumed to be for the same name)
2304 has already been seen.
2305 Otherwise return an error message format string with a %s
2306 where the identifier should go. */
2309 redeclaration_error_message (tree newdecl, tree olddecl)
2311 if (TREE_CODE (newdecl) == TYPE_DECL)
2313 /* Because C++ can put things into name space for free,
2314 constructs like "typedef struct foo { ... } foo"
2315 would look like an erroneous redeclaration. */
2316 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2319 return G_("redefinition of %q#D");
2321 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2323 /* If this is a pure function, its olddecl will actually be
2324 the original initialization to `0' (which we force to call
2325 abort()). Don't complain about redefinition in this case. */
2326 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2327 && DECL_INITIAL (olddecl) == NULL_TREE)
2330 /* If both functions come from different namespaces, this is not
2331 a redeclaration - this is a conflict with a used function. */
2332 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2333 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2334 && ! decls_match (olddecl, newdecl))
2335 return G_("%qD conflicts with used function");
2337 /* We'll complain about linkage mismatches in
2338 warn_extern_redeclared_static. */
2340 /* Defining the same name twice is no good. */
2341 if (DECL_INITIAL (olddecl) != NULL_TREE
2342 && DECL_INITIAL (newdecl) != NULL_TREE)
2344 if (DECL_NAME (olddecl) == NULL_TREE)
2345 return G_("%q#D not declared in class");
2346 else if (!GNU_INLINE_P (olddecl)
2347 || GNU_INLINE_P (newdecl))
2348 return G_("redefinition of %q#D");
2351 if (DECL_DECLARED_INLINE_P (olddecl) && DECL_DECLARED_INLINE_P (newdecl))
2353 bool olda = GNU_INLINE_P (olddecl);
2354 bool newa = GNU_INLINE_P (newdecl);
2359 return G_("%q+D redeclared inline with "
2360 "%<gnu_inline%> attribute");
2362 return G_("%q+D redeclared inline without "
2363 "%<gnu_inline%> attribute");
2369 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2373 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2375 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2376 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2377 return G_("redefinition of %q#D");
2381 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2382 || (DECL_TEMPLATE_RESULT (newdecl)
2383 == DECL_TEMPLATE_RESULT (olddecl)))
2386 nt = DECL_TEMPLATE_RESULT (newdecl);
2387 if (DECL_TEMPLATE_INFO (nt))
2388 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2389 ot = DECL_TEMPLATE_RESULT (olddecl);
2390 if (DECL_TEMPLATE_INFO (ot))
2391 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2392 if (DECL_INITIAL (nt) && DECL_INITIAL (ot)
2393 && (!GNU_INLINE_P (ot) || GNU_INLINE_P (nt)))
2394 return G_("redefinition of %q#D");
2396 if (DECL_DECLARED_INLINE_P (ot) && DECL_DECLARED_INLINE_P (nt))
2398 bool olda = GNU_INLINE_P (ot);
2399 bool newa = GNU_INLINE_P (nt);
2404 return G_("%q+D redeclared inline with "
2405 "%<gnu_inline%> attribute");
2407 return G_("%q+D redeclared inline without "
2408 "%<gnu_inline%> attribute");
2412 /* Core issue #226 (C++0x):
2414 If a friend function template declaration specifies a
2415 default template-argument, that declaration shall be a
2416 definition and shall be the only declaration of the
2417 function template in the translation unit. */
2418 if ((cxx_dialect != cxx98)
2419 && TREE_CODE (ot) == FUNCTION_DECL && DECL_FRIEND_P (ot)
2420 && !check_default_tmpl_args (nt, DECL_TEMPLATE_PARMS (newdecl),
2421 /*is_primary=*/1, /*is_partial=*/0,
2422 /*is_friend_decl=*/2))
2423 return G_("redeclaration of friend %q#D "
2424 "may not have default template arguments");
2428 else if (TREE_CODE (newdecl) == VAR_DECL
2429 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2430 && (! DECL_LANG_SPECIFIC (olddecl)
2431 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2432 || DECL_THREAD_LOCAL_P (newdecl)))
2434 /* Only variables can be thread-local, and all declarations must
2435 agree on this property. */
2436 if (DECL_THREAD_LOCAL_P (newdecl))
2437 return G_("thread-local declaration of %q#D follows "
2438 "non-thread-local declaration");
2440 return G_("non-thread-local declaration of %q#D follows "
2441 "thread-local declaration");
2443 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2445 /* The objects have been declared at namespace scope. If either
2446 is a member of an anonymous union, then this is an invalid
2447 redeclaration. For example:
2453 if ((TREE_CODE (newdecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (newdecl))
2454 || (TREE_CODE (olddecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (olddecl)))
2455 return G_("redeclaration of %q#D");
2456 /* If at least one declaration is a reference, there is no
2457 conflict. For example:
2463 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2465 /* Reject two definitions. */
2466 return G_("redefinition of %q#D");
2470 /* Objects declared with block scope: */
2471 /* Reject two definitions, and reject a definition
2472 together with an external reference. */
2473 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2474 return G_("redeclaration of %q#D");
2479 /* Hash and equality functions for the named_label table. */
2482 named_label_entry_hash (const void *data)
2484 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2485 return DECL_UID (ent->label_decl);
2489 named_label_entry_eq (const void *a, const void *b)
2491 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2492 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2493 return ent_a->label_decl == ent_b->label_decl;
2496 /* Create a new label, named ID. */
2499 make_label_decl (tree id, int local_p)
2501 struct named_label_entry *ent;
2505 decl = build_decl (input_location, LABEL_DECL, id, void_type_node);
2507 DECL_CONTEXT (decl) = current_function_decl;
2508 DECL_MODE (decl) = VOIDmode;
2509 C_DECLARED_LABEL_FLAG (decl) = local_p;
2511 /* Say where one reference is to the label, for the sake of the
2512 error if it is not defined. */
2513 DECL_SOURCE_LOCATION (decl) = input_location;
2515 /* Record the fact that this identifier is bound to this label. */
2516 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2518 /* Create the label htab for the function on demand. */
2520 named_labels = htab_create_ggc (13, named_label_entry_hash,
2521 named_label_entry_eq, NULL);
2523 /* Record this label on the list of labels used in this function.
2524 We do this before calling make_label_decl so that we get the
2525 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2526 ent = ggc_alloc_cleared_named_label_entry ();
2527 ent->label_decl = decl;
2529 slot = htab_find_slot (named_labels, ent, INSERT);
2530 gcc_assert (*slot == NULL);
2536 /* Look for a label named ID in the current function. If one cannot
2537 be found, create one. (We keep track of used, but undefined,
2538 labels, and complain about them at the end of a function.) */
2541 lookup_label_1 (tree id)
2545 /* You can't use labels at global scope. */
2546 if (current_function_decl == NULL_TREE)
2548 error ("label %qE referenced outside of any function", id);
2552 /* See if we've already got this label. */
2553 decl = IDENTIFIER_LABEL_VALUE (id);
2554 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2557 decl = make_label_decl (id, /*local_p=*/0);
2561 /* Wrapper for lookup_label_1. */
2564 lookup_label (tree id)
2567 bool subtime = timevar_cond_start (TV_NAME_LOOKUP);
2568 ret = lookup_label_1 (id);
2569 timevar_cond_stop (TV_NAME_LOOKUP, subtime);
2573 /* Declare a local label named ID. */
2576 declare_local_label (tree id)
2579 cp_label_binding *bind;
2581 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2582 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2583 bind = VEC_safe_push (cp_label_binding, gc,
2584 current_binding_level->shadowed_labels, NULL);
2585 bind->prev_value = IDENTIFIER_LABEL_VALUE (id);
2587 decl = make_label_decl (id, /*local_p=*/1);
2593 /* Returns nonzero if it is ill-formed to jump past the declaration of
2594 DECL. Returns 2 if it's also a real problem. */
2597 decl_jump_unsafe (tree decl)
2599 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2600 with automatic storage duration is not in scope to a point where it is
2601 in scope is ill-formed unless the variable has scalar type, class type
2602 with a trivial default constructor and a trivial destructor, a
2603 cv-qualified version of one of these types, or an array of one of the
2604 preceding types and is declared without an initializer (8.5). */
2605 tree type = TREE_TYPE (decl);
2607 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2608 || type == error_mark_node)
2611 type = strip_array_types (type);
2613 if (type_has_nontrivial_default_init (TREE_TYPE (decl))
2614 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2617 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
2623 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2626 identify_goto (tree decl, const location_t *locus)
2629 permerror (input_location, "jump to label %qD", decl);
2631 permerror (input_location, "jump to case label");
2633 permerror (*locus, " from here");
2636 /* Check that a single previously seen jump to a newly defined label
2637 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2638 the jump context; NAMES are the names in scope in LEVEL at the jump
2639 context; LOCUS is the source position of the jump or 0. Returns
2640 true if all is well. */
2643 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2644 bool exited_omp, const location_t *locus)
2646 struct cp_binding_level *b;
2647 bool identified = false, saw_eh = false, saw_omp = false;
2651 identify_goto (decl, locus);
2652 error (" exits OpenMP structured block");
2653 identified = saw_omp = true;
2656 for (b = current_binding_level; b ; b = b->level_chain)
2658 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2660 for (new_decls = b->names; new_decls != old_decls;
2661 new_decls = DECL_CHAIN (new_decls))
2663 int problem = decl_jump_unsafe (new_decls);
2669 identify_goto (decl, locus);
2673 error (" crosses initialization of %q+#D", new_decls);
2675 permerror (input_location, " enters scope of %q+#D which has "
2676 "non-trivial destructor", new_decls);
2681 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2685 identify_goto (decl, locus);
2688 if (b->kind == sk_try)
2689 error (" enters try block");
2691 error (" enters catch block");
2694 if (b->kind == sk_omp && !saw_omp)
2698 identify_goto (decl, locus);
2701 error (" enters OpenMP structured block");
2710 check_previous_goto (tree decl, struct named_label_use_entry *use)
2712 check_previous_goto_1 (decl, use->binding_level,
2713 use->names_in_scope, use->in_omp_scope,
2714 &use->o_goto_locus);
2718 check_switch_goto (struct cp_binding_level* level)
2720 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2723 /* Check that a new jump to a label DECL is OK. Called by
2724 finish_goto_stmt. */
2727 check_goto (tree decl)
2729 struct named_label_entry *ent, dummy;
2730 bool saw_catch = false, identified = false;
2734 /* We can't know where a computed goto is jumping.
2735 So we assume that it's OK. */
2736 if (TREE_CODE (decl) != LABEL_DECL)
2739 /* We didn't record any information about this label when we created it,
2740 and there's not much point since it's trivial to analyze as a return. */
2741 if (decl == cdtor_label)
2744 dummy.label_decl = decl;
2745 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2746 gcc_assert (ent != NULL);
2748 /* If the label hasn't been defined yet, defer checking. */
2749 if (! DECL_INITIAL (decl))
2751 struct named_label_use_entry *new_use;
2753 /* Don't bother creating another use if the last goto had the
2754 same data, and will therefore create the same set of errors. */
2756 && ent->uses->names_in_scope == current_binding_level->names)
2759 new_use = ggc_alloc_named_label_use_entry ();
2760 new_use->binding_level = current_binding_level;
2761 new_use->names_in_scope = current_binding_level->names;
2762 new_use->o_goto_locus = input_location;
2763 new_use->in_omp_scope = false;
2765 new_use->next = ent->uses;
2766 ent->uses = new_use;
2770 if (ent->in_try_scope || ent->in_catch_scope
2771 || ent->in_omp_scope || !VEC_empty (tree, ent->bad_decls))
2773 permerror (input_location, "jump to label %q+D", decl);
2774 permerror (input_location, " from here");
2778 FOR_EACH_VEC_ELT (tree, ent->bad_decls, ix, bad)
2780 int u = decl_jump_unsafe (bad);
2782 if (u > 1 && DECL_ARTIFICIAL (bad))
2784 /* Can't skip init of __exception_info. */
2785 error_at (DECL_SOURCE_LOCATION (bad), " enters catch block");
2789 error (" skips initialization of %q+#D", bad);
2791 permerror (input_location, " enters scope of %q+#D which has "
2792 "non-trivial destructor", bad);
2795 if (ent->in_try_scope)
2796 error (" enters try block");
2797 else if (ent->in_catch_scope && !saw_catch)
2798 error (" enters catch block");
2800 if (ent->in_omp_scope)
2801 error (" enters OpenMP structured block");
2802 else if (flag_openmp)
2804 struct cp_binding_level *b;
2805 for (b = current_binding_level; b ; b = b->level_chain)
2807 if (b == ent->binding_level)
2809 if (b->kind == sk_omp)
2813 permerror (input_location, "jump to label %q+D", decl);
2814 permerror (input_location, " from here");
2817 error (" exits OpenMP structured block");
2824 /* Check that a return is ok wrt OpenMP structured blocks.
2825 Called by finish_return_stmt. Returns true if all is well. */
2828 check_omp_return (void)
2830 struct cp_binding_level *b;
2831 for (b = current_binding_level; b ; b = b->level_chain)
2832 if (b->kind == sk_omp)
2834 error ("invalid exit from OpenMP structured block");
2837 else if (b->kind == sk_function_parms)
2842 /* Define a label, specifying the location in the source file.
2843 Return the LABEL_DECL node for the label. */
2846 define_label_1 (location_t location, tree name)
2848 struct named_label_entry *ent, dummy;
2849 struct cp_binding_level *p;
2852 decl = lookup_label (name);
2854 dummy.label_decl = decl;
2855 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2856 gcc_assert (ent != NULL);
2858 /* After labels, make any new cleanups in the function go into their
2859 own new (temporary) binding contour. */
2860 for (p = current_binding_level;
2861 p->kind != sk_function_parms;
2863 p->more_cleanups_ok = 0;
2865 if (name == get_identifier ("wchar_t"))
2866 permerror (input_location, "label named wchar_t");
2868 if (DECL_INITIAL (decl) != NULL_TREE)
2870 error ("duplicate label %qD", decl);
2871 return error_mark_node;
2875 struct named_label_use_entry *use;
2877 /* Mark label as having been defined. */
2878 DECL_INITIAL (decl) = error_mark_node;
2879 /* Say where in the source. */
2880 DECL_SOURCE_LOCATION (decl) = location;
2882 ent->binding_level = current_binding_level;
2883 ent->names_in_scope = current_binding_level->names;
2885 for (use = ent->uses; use ; use = use->next)
2886 check_previous_goto (decl, use);
2893 /* Wrapper for define_label_1. */
2896 define_label (location_t location, tree name)
2899 timevar_start (TV_NAME_LOOKUP);
2900 ret = define_label_1 (location, name);
2901 timevar_stop (TV_NAME_LOOKUP);
2908 struct cp_binding_level *level;
2909 struct cp_switch *next;
2910 /* The SWITCH_STMT being built. */
2912 /* A splay-tree mapping the low element of a case range to the high
2913 element, or NULL_TREE if there is no high element. Used to
2914 determine whether or not a new case label duplicates an old case
2915 label. We need a tree, rather than simply a hash table, because
2916 of the GNU case range extension. */
2920 /* A stack of the currently active switch statements. The innermost
2921 switch statement is on the top of the stack. There is no need to
2922 mark the stack for garbage collection because it is only active
2923 during the processing of the body of a function, and we never
2924 collect at that point. */
2926 static struct cp_switch *switch_stack;
2928 /* Called right after a switch-statement condition is parsed.
2929 SWITCH_STMT is the switch statement being parsed. */
2932 push_switch (tree switch_stmt)
2934 struct cp_switch *p = XNEW (struct cp_switch);
2935 p->level = current_binding_level;
2936 p->next = switch_stack;
2937 p->switch_stmt = switch_stmt;
2938 p->cases = splay_tree_new (case_compare, NULL, NULL);
2945 struct cp_switch *cs = switch_stack;
2946 location_t switch_location;
2948 /* Emit warnings as needed. */
2949 switch_location = EXPR_LOC_OR_HERE (cs->switch_stmt);
2950 if (!processing_template_decl)
2951 c_do_switch_warnings (cs->cases, switch_location,
2952 SWITCH_STMT_TYPE (cs->switch_stmt),
2953 SWITCH_STMT_COND (cs->switch_stmt));
2955 splay_tree_delete (cs->cases);
2956 switch_stack = switch_stack->next;
2960 /* Note that we've seen a definition of a case label, and complain if this
2961 is a bad place for one. */
2964 finish_case_label (location_t loc, tree low_value, tree high_value)
2967 struct cp_binding_level *p;
2969 if (processing_template_decl)
2973 /* For templates, just add the case label; we'll do semantic
2974 analysis at instantiation-time. */
2975 label = build_decl (loc, LABEL_DECL, NULL_TREE, NULL_TREE);
2976 return add_stmt (build_case_label (low_value, high_value, label));
2979 /* Find the condition on which this switch statement depends. */
2980 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2981 if (cond && TREE_CODE (cond) == TREE_LIST)
2982 cond = TREE_VALUE (cond);
2984 if (!check_switch_goto (switch_stack->level))
2985 return error_mark_node;
2988 low_value = cxx_constant_value (low_value);
2990 high_value = cxx_constant_value (high_value);
2992 r = c_add_case_label (loc, switch_stack->cases, cond,
2993 SWITCH_STMT_TYPE (switch_stack->switch_stmt),
2994 low_value, high_value);
2996 /* After labels, make any new cleanups in the function go into their
2997 own new (temporary) binding contour. */
2998 for (p = current_binding_level;
2999 p->kind != sk_function_parms;
3001 p->more_cleanups_ok = 0;
3006 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
3009 typename_hash (const void* k)
3012 const_tree const t = (const_tree) k;
3014 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
3015 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
3020 typedef struct typename_info {
3028 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
3029 really of type `typename_info*' */
3032 typename_compare (const void * k1, const void * k2)
3034 const_tree const t1 = (const_tree) k1;
3035 const typename_info *const t2 = (const typename_info *) k2;
3037 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
3038 && TYPE_CONTEXT (t1) == t2->scope
3039 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
3040 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
3041 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
3044 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3045 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3047 Returns the new TYPENAME_TYPE. */
3049 static GTY ((param_is (union tree_node))) htab_t typename_htab;
3052 build_typename_type (tree context, tree name, tree fullname,
3053 enum tag_types tag_type)
3061 if (typename_htab == NULL)
3062 typename_htab = htab_create_ggc (61, &typename_hash,
3063 &typename_compare, NULL);
3065 ti.scope = FROB_CONTEXT (context);
3067 ti.template_id = fullname;
3068 ti.enum_p = tag_type == enum_type;
3069 ti.class_p = (tag_type == class_type
3070 || tag_type == record_type
3071 || tag_type == union_type);
3072 hash = (htab_hash_pointer (ti.scope)
3073 ^ htab_hash_pointer (ti.name));
3075 /* See if we already have this type. */
3076 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
3081 /* Build the TYPENAME_TYPE. */
3082 t = cxx_make_type (TYPENAME_TYPE);
3083 TYPE_CONTEXT (t) = ti.scope;
3084 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
3085 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
3086 TYPENAME_IS_CLASS_P (t) = ti.class_p;
3088 /* Build the corresponding TYPE_DECL. */
3089 d = build_decl (input_location, TYPE_DECL, name, t);
3090 TYPE_NAME (TREE_TYPE (d)) = d;
3091 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
3092 DECL_CONTEXT (d) = FROB_CONTEXT (context);
3093 DECL_ARTIFICIAL (d) = 1;
3095 /* Store it in the hash table. */
3098 /* TYPENAME_TYPEs must always be compared structurally, because
3099 they may or may not resolve down to another type depending on
3100 the currently open classes. */
3101 SET_TYPE_STRUCTURAL_EQUALITY (t);
3107 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3108 provided to name the type. Returns an appropriate type, unless an
3109 error occurs, in which case error_mark_node is returned. If we
3110 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3111 return that, rather than the _TYPE it corresponds to, in other
3112 cases we look through the type decl. If TF_ERROR is set, complain
3113 about errors, otherwise be quiet. */
3116 make_typename_type (tree context, tree name, enum tag_types tag_type,
3117 tsubst_flags_t complain)
3123 if (name == error_mark_node
3124 || context == NULL_TREE
3125 || context == error_mark_node)
3126 return error_mark_node;
3130 if (!(TYPE_LANG_SPECIFIC (name)
3131 && (CLASSTYPE_IS_TEMPLATE (name)
3132 || CLASSTYPE_USE_TEMPLATE (name))))
3133 name = TYPE_IDENTIFIER (name);
3135 /* Create a TEMPLATE_ID_EXPR for the type. */
3136 name = build_nt (TEMPLATE_ID_EXPR,
3137 CLASSTYPE_TI_TEMPLATE (name),
3138 CLASSTYPE_TI_ARGS (name));
3140 else if (TREE_CODE (name) == TYPE_DECL)
3141 name = DECL_NAME (name);
3145 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
3147 name = TREE_OPERAND (name, 0);
3148 if (TREE_CODE (name) == TEMPLATE_DECL)
3149 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
3150 else if (TREE_CODE (name) == OVERLOAD)
3152 error ("%qD is not a type", name);
3153 return error_mark_node;
3156 if (TREE_CODE (name) == TEMPLATE_DECL)
3158 error ("%qD used without template parameters", name);
3159 return error_mark_node;
3161 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3162 gcc_assert (TYPE_P (context));
3164 if (!MAYBE_CLASS_TYPE_P (context))
3166 if (complain & tf_error)
3167 error ("%q#T is not a class", context);
3168 return error_mark_node;
3171 /* When the CONTEXT is a dependent type, NAME could refer to a
3172 dependent base class of CONTEXT. But look inside it anyway
3173 if CONTEXT is a currently open scope, in case it refers to a
3174 member of the current instantiation or a non-dependent base;
3175 lookup will stop when we hit a dependent base. */
3176 if (!dependent_scope_p (context))
3177 /* We should only set WANT_TYPE when we're a nested typename type.
3178 Then we can give better diagnostics if we find a non-type. */
3179 t = lookup_field (context, name, 2, /*want_type=*/true);
3183 if ((!t || TREE_CODE (t) == TREE_LIST) && dependent_type_p (context))
3184 return build_typename_type (context, name, fullname, tag_type);
3186 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
3190 if (complain & tf_error)
3191 error (want_template ? "no class template named %q#T in %q#T"
3192 : "no type named %q#T in %q#T", name, context);
3193 return error_mark_node;
3196 /* Pull out the template from an injected-class-name (or multiple). */
3198 t = maybe_get_template_decl_from_type_decl (t);
3200 if (TREE_CODE (t) == TREE_LIST)
3202 if (complain & tf_error)
3204 error ("lookup of %qT in %qT is ambiguous", name, context);
3205 print_candidates (t);
3207 return error_mark_node;
3210 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
3212 if (complain & tf_error)
3213 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3215 return error_mark_node;
3217 if (!want_template && TREE_CODE (t) != TYPE_DECL)
3219 if (complain & tf_error)
3220 error ("%<typename %T::%D%> names %q#T, which is not a type",
3222 return error_mark_node;
3225 if (complain & tf_error)
3226 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
3228 /* If we are currently parsing a template and if T is a typedef accessed
3229 through CONTEXT then we need to remember and check access of T at
3230 template instantiation time. */
3231 add_typedef_to_current_template_for_access_check (t, context, input_location);
3234 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
3236 /*entering_scope=*/0,
3237 tf_warning_or_error | tf_user);
3239 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
3245 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3246 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3247 in which case error_mark_node is returned.
3249 If PARM_LIST is non-NULL, also make sure that the template parameter
3250 list of TEMPLATE_DECL matches.
3252 If COMPLAIN zero, don't complain about any errors that occur. */
3255 make_unbound_class_template (tree context, tree name, tree parm_list,
3256 tsubst_flags_t complain)
3262 name = TYPE_IDENTIFIER (name);
3263 else if (DECL_P (name))
3264 name = DECL_NAME (name);
3265 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3267 if (!dependent_type_p (context)
3268 || currently_open_class (context))
3270 tree tmpl = NULL_TREE;
3272 if (MAYBE_CLASS_TYPE_P (context))
3273 tmpl = lookup_field (context, name, 0, false);
3275 if (tmpl && TREE_CODE (tmpl) == TYPE_DECL)
3276 tmpl = maybe_get_template_decl_from_type_decl (tmpl);
3278 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
3280 if (complain & tf_error)
3281 error ("no class template named %q#T in %q#T", name, context);
3282 return error_mark_node;
3286 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
3288 if (complain & tf_error)
3290 error ("template parameters do not match template");
3291 error ("%q+D declared here", tmpl);
3293 return error_mark_node;
3296 if (complain & tf_error)
3297 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
3302 /* Build the UNBOUND_CLASS_TEMPLATE. */
3303 t = cxx_make_type (UNBOUND_CLASS_TEMPLATE);
3304 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
3305 TREE_TYPE (t) = NULL_TREE;
3306 SET_TYPE_STRUCTURAL_EQUALITY (t);
3308 /* Build the corresponding TEMPLATE_DECL. */
3309 d = build_decl (input_location, TEMPLATE_DECL, name, t);
3310 TYPE_NAME (TREE_TYPE (d)) = d;
3311 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
3312 DECL_CONTEXT (d) = FROB_CONTEXT (context);
3313 DECL_ARTIFICIAL (d) = 1;
3314 DECL_TEMPLATE_PARMS (d) = parm_list;
3321 /* Push the declarations of builtin types into the namespace.
3322 RID_INDEX is the index of the builtin type in the array
3323 RID_POINTERS. NAME is the name used when looking up the builtin
3324 type. TYPE is the _TYPE node for the builtin type. */
3327 record_builtin_type (enum rid rid_index,
3331 tree rname = NULL_TREE, tname = NULL_TREE;
3332 tree tdecl = NULL_TREE;
3334 if ((int) rid_index < (int) RID_MAX)
3335 rname = ridpointers[(int) rid_index];
3337 tname = get_identifier (name);
3339 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3340 eliminated. Built-in types should not be looked up name; their
3341 names are keywords that the parser can recognize. However, there
3342 is code in c-common.c that uses identifier_global_value to look
3343 up built-in types by name. */
3346 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, tname, type);
3347 DECL_ARTIFICIAL (tdecl) = 1;
3348 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
3354 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, rname, type);
3355 DECL_ARTIFICIAL (tdecl) = 1;
3357 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
3360 if (!TYPE_NAME (type))
3361 TYPE_NAME (type) = tdecl;
3364 debug_hooks->type_decl (tdecl, 0);
3367 /* Record one of the standard Java types.
3368 * Declare it as having the given NAME.
3369 * If SIZE > 0, it is the size of one of the integral types;
3370 * otherwise it is the negative of the size of one of the other types. */
3373 record_builtin_java_type (const char* name, int size)
3378 type = build_nonstandard_integer_type (size, 0);
3379 type = build_distinct_type_copy (type);
3381 else if (size > -32)
3384 /* "__java_char" or ""__java_boolean". */
3385 type = build_nonstandard_integer_type (-size, 1);
3386 type = build_distinct_type_copy (type);
3387 /* Get the signed type cached and attached to the unsigned type,
3388 so it doesn't get garbage-collected at "random" times,
3389 causing potential codegen differences out of different UIDs
3390 and different alias set numbers. */
3391 stype = build_nonstandard_integer_type (-size, 0);
3392 stype = build_distinct_type_copy (stype);
3393 TREE_CHAIN (type) = stype;
3394 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3397 { /* "__java_float" or ""__java_double". */
3398 type = make_node (REAL_TYPE);
3399 TYPE_PRECISION (type) = - size;
3402 record_builtin_type (RID_MAX, name, type);
3403 decl = TYPE_NAME (type);
3405 /* Suppress generate debug symbol entries for these types,
3406 since for normal C++ they are just clutter.
3407 However, push_lang_context undoes this if extern "Java" is seen. */
3408 DECL_IGNORED_P (decl) = 1;
3410 TYPE_FOR_JAVA (type) = 1;
3414 /* Push a type into the namespace so that the back ends ignore it. */
3417 record_unknown_type (tree type, const char* name)
3419 tree decl = pushdecl (build_decl (UNKNOWN_LOCATION,
3420 TYPE_DECL, get_identifier (name), type));
3421 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3422 DECL_IGNORED_P (decl) = 1;
3423 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3424 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3425 TYPE_ALIGN (type) = 1;
3426 TYPE_USER_ALIGN (type) = 0;
3427 SET_TYPE_MODE (type, TYPE_MODE (void_type_node));
3430 /* A string for which we should create an IDENTIFIER_NODE at
3433 typedef struct predefined_identifier
3435 /* The name of the identifier. */
3436 const char *const name;
3437 /* The place where the IDENTIFIER_NODE should be stored. */
3439 /* Nonzero if this is the name of a constructor or destructor. */
3440 const int ctor_or_dtor_p;
3441 } predefined_identifier;
3443 /* Create all the predefined identifiers. */
3446 initialize_predefined_identifiers (void)
3448 const predefined_identifier *pid;
3450 /* A table of identifiers to create at startup. */
3451 static const predefined_identifier predefined_identifiers[] = {
3452 { "C++", &lang_name_cplusplus, 0 },
3453 { "C", &lang_name_c, 0 },
3454 { "Java", &lang_name_java, 0 },
3455 /* Some of these names have a trailing space so that it is
3456 impossible for them to conflict with names written by users. */
3457 { "__ct ", &ctor_identifier, 1 },
3458 { "__base_ctor ", &base_ctor_identifier, 1 },
3459 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3460 { "__dt ", &dtor_identifier, 1 },
3461 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3462 { "__base_dtor ", &base_dtor_identifier, 1 },
3463 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3464 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3465 { "nelts", &nelts_identifier, 0 },
3466 { THIS_NAME, &this_identifier, 0 },
3467 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3468 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3469 { "_vptr", &vptr_identifier, 0 },
3470 { "__vtt_parm", &vtt_parm_identifier, 0 },
3471 { "::", &global_scope_name, 0 },
3472 { "std", &std_identifier, 0 },
3476 for (pid = predefined_identifiers; pid->name; ++pid)
3478 *pid->node = get_identifier (pid->name);
3479 if (pid->ctor_or_dtor_p)
3480 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3484 /* Create the predefined scalar types of C,
3485 and some nodes representing standard constants (0, 1, (void *)0).
3486 Initialize the global binding level.
3487 Make definitions for built-in primitive functions. */
3490 cxx_init_decl_processing (void)
3493 tree void_ftype_ptr;
3495 build_common_tree_nodes (flag_signed_char);
3497 /* Create all the identifiers we need. */
3498 initialize_predefined_identifiers ();
3500 /* Create the global variables. */
3501 push_to_top_level ();
3503 current_function_decl = NULL_TREE;
3504 current_binding_level = NULL;
3505 /* Enter the global namespace. */
3506 gcc_assert (global_namespace == NULL_TREE);
3507 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3509 DECL_CONTEXT (global_namespace) = build_translation_unit_decl (NULL_TREE);
3510 TREE_PUBLIC (global_namespace) = 1;
3511 begin_scope (sk_namespace, global_namespace);
3513 current_lang_name = NULL_TREE;
3515 if (flag_visibility_ms_compat)
3516 default_visibility = VISIBILITY_HIDDEN;
3519 current_lang_name = lang_name_c;
3521 /* Create the `std' namespace. */
3522 push_namespace (std_identifier);
3523 std_node = current_namespace;
3526 c_common_nodes_and_builtins ();
3528 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3529 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3530 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3531 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3532 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3533 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3534 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3535 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3537 integer_two_node = build_int_cst (NULL_TREE, 2);
3539 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3540 truthvalue_type_node = boolean_type_node;
3541 truthvalue_false_node = boolean_false_node;
3542 truthvalue_true_node = boolean_true_node;
3544 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3545 noexcept_true_spec = build_tree_list (boolean_true_node, NULL_TREE);
3546 noexcept_false_spec = build_tree_list (boolean_false_node, NULL_TREE);
3549 record_builtin_type (RID_MAX, NULL, string_type_node);
3552 delta_type_node = ptrdiff_type_node;
3553 vtable_index_type = ptrdiff_type_node;
3555 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3556 void_ftype = build_function_type_list (void_type_node, NULL_TREE);
3557 void_ftype_ptr = build_function_type_list (void_type_node,
3558 ptr_type_node, NULL_TREE);
3560 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3562 /* C++ extensions */
3564 unknown_type_node = make_node (LANG_TYPE);
3565 record_unknown_type (unknown_type_node, "unknown type");
3567 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3568 TREE_TYPE (unknown_type_node) = unknown_type_node;
3570 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3572 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3573 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3575 init_list_type_node = make_node (LANG_TYPE);
3576 record_unknown_type (init_list_type_node, "init list");
3579 /* Make sure we get a unique function type, so we can give
3580 its pointer type a name. (This wins for gdb.) */
3581 tree vfunc_type = make_node (FUNCTION_TYPE);
3582 TREE_TYPE (vfunc_type) = integer_type_node;
3583 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3584 layout_type (vfunc_type);
3586 vtable_entry_type = build_pointer_type (vfunc_type);
3588 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3591 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3592 layout_type (vtbl_type_node);
3593 vtbl_type_node = cp_build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3594 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3595 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3596 layout_type (vtbl_ptr_type_node);
3597 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3599 push_namespace (get_identifier ("__cxxabiv1"));
3600 abi_node = current_namespace;
3603 global_type_node = make_node (LANG_TYPE);
3604 record_unknown_type (global_type_node, "global type");
3607 current_lang_name = lang_name_cplusplus;
3610 tree newtype, deltype;
3611 tree ptr_ftype_sizetype;
3615 = build_function_type_list (ptr_type_node, size_type_node, NULL_TREE);
3616 if (cxx_dialect == cxx98)
3619 tree bad_alloc_type_node;
3620 tree bad_alloc_decl;
3622 push_namespace (std_identifier);
3623 bad_alloc_id = get_identifier ("bad_alloc");
3624 bad_alloc_type_node = make_class_type (RECORD_TYPE);
3625 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3627 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3628 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3632 = add_exception_specifier (NULL_TREE, bad_alloc_type_node, -1);
3635 new_eh_spec = noexcept_false_spec;
3637 newtype = build_exception_variant (ptr_ftype_sizetype, new_eh_spec);
3638 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3639 push_cp_library_fn (NEW_EXPR, newtype);
3640 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3641 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3642 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3644 nullptr_type_node = make_node (NULLPTR_TYPE);
3645 TYPE_SIZE (nullptr_type_node) = bitsize_int (GET_MODE_BITSIZE (ptr_mode));
3646 TYPE_SIZE_UNIT (nullptr_type_node) = size_int (GET_MODE_SIZE (ptr_mode));
3647 TYPE_UNSIGNED (nullptr_type_node) = 1;
3648 TYPE_PRECISION (nullptr_type_node) = GET_MODE_BITSIZE (ptr_mode);
3649 SET_TYPE_MODE (nullptr_type_node, Pmode);
3650 record_builtin_type (RID_MAX, "decltype(nullptr)", nullptr_type_node);
3651 nullptr_node = build_int_cst (nullptr_type_node, 0);
3655 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3657 /* Perform other language dependent initializations. */
3658 init_class_processing ();
3659 init_rtti_processing ();
3660 init_template_processing ();
3662 if (flag_exceptions)
3663 init_exception_processing ();
3665 if (! supports_one_only ())
3668 make_fname_decl = cp_make_fname_decl;
3669 start_fname_decls ();
3671 /* Show we use EH for cleanups. */
3672 if (flag_exceptions)
3673 using_eh_for_cleanups ();
3676 /* Generate an initializer for a function naming variable from
3677 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3678 filled in with the type of the init. */
3681 cp_fname_init (const char* name, tree *type_p)
3683 tree domain = NULL_TREE;
3685 tree init = NULL_TREE;
3690 length = strlen (name);
3691 domain = build_index_type (size_int (length));
3692 init = build_string (length + 1, name);
3695 type = cp_build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3696 type = build_cplus_array_type (type, domain);
3701 TREE_TYPE (init) = type;
3703 init = error_mark_node;
3708 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3709 the decl, LOC is the location to give the decl, NAME is the
3710 initialization string and TYPE_DEP indicates whether NAME depended
3711 on the type of the function. We make use of that to detect
3712 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3713 at the point of first use, so we mustn't push the decl now. */
3716 cp_make_fname_decl (location_t loc, tree id, int type_dep)
3718 const char *const name = (type_dep && processing_template_decl
3719 ? NULL : fname_as_string (type_dep));
3721 tree init = cp_fname_init (name, &type);
3722 tree decl = build_decl (loc, VAR_DECL, id, type);
3725 free (CONST_CAST (char *, name));
3727 /* As we're using pushdecl_with_scope, we must set the context. */
3728 DECL_CONTEXT (decl) = current_function_decl;
3729 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3731 TREE_STATIC (decl) = 1;
3732 TREE_READONLY (decl) = 1;
3733 DECL_ARTIFICIAL (decl) = 1;
3735 TREE_USED (decl) = 1;
3737 if (current_function_decl)
3739 struct cp_binding_level *b = current_binding_level;
3740 if (b->kind == sk_function_parms)
3741 return error_mark_node;
3742 while (b->level_chain->kind != sk_function_parms)
3744 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3745 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3746 LOOKUP_ONLYCONVERTING);
3750 DECL_THIS_STATIC (decl) = true;
3751 pushdecl_top_level_and_finish (decl, init);
3758 builtin_function_1 (tree decl, tree context, bool is_global)
3760 tree id = DECL_NAME (decl);
3761 const char *name = IDENTIFIER_POINTER (id);
3763 retrofit_lang_decl (decl);
3765 DECL_ARTIFICIAL (decl) = 1;
3766 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3767 SET_DECL_LANGUAGE (decl, lang_c);
3768 /* Runtime library routines are, by definition, available in an
3769 external shared object. */
3770 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3771 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3773 DECL_CONTEXT (decl) = context;
3776 pushdecl_top_level (decl);
3780 /* A function in the user's namespace should have an explicit
3781 declaration before it is used. Mark the built-in function as
3782 anticipated but not actually declared. */
3783 if (name[0] != '_' || name[1] != '_')
3784 DECL_ANTICIPATED (decl) = 1;
3785 else if (strncmp (name + 2, "builtin_", strlen ("builtin_")) != 0)
3787 size_t len = strlen (name);
3789 /* Treat __*_chk fortification functions as anticipated as well,
3790 unless they are __builtin_*. */
3791 if (len > strlen ("___chk")
3792 && memcmp (name + len - strlen ("_chk"),
3793 "_chk", strlen ("_chk") + 1) == 0)
3794 DECL_ANTICIPATED (decl) = 1;
3801 cxx_builtin_function (tree decl)
3803 tree id = DECL_NAME (decl);
3804 const char *name = IDENTIFIER_POINTER (id);
3805 /* All builtins that don't begin with an '_' should additionally
3806 go in the 'std' namespace. */
3809 tree decl2 = copy_node(decl);
3810 push_namespace (std_identifier);
3811 builtin_function_1 (decl2, std_node, false);
3815 return builtin_function_1 (decl, NULL_TREE, false);
3818 /* Like cxx_builtin_function, but guarantee the function is added to the global
3819 scope. This is to allow function specific options to add new machine
3820 dependent builtins when the target ISA changes via attribute((target(...)))
3821 which saves space on program startup if the program does not use non-generic
3825 cxx_builtin_function_ext_scope (tree decl)
3828 tree id = DECL_NAME (decl);
3829 const char *name = IDENTIFIER_POINTER (id);
3830 /* All builtins that don't begin with an '_' should additionally
3831 go in the 'std' namespace. */
3834 tree decl2 = copy_node(decl);
3835 push_namespace (std_identifier);
3836 builtin_function_1 (decl2, std_node, true);
3840 return builtin_function_1 (decl, NULL_TREE, true);
3843 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3844 function. Not called directly. */
3847 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3849 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3850 DECL_EXTERNAL (fn) = 1;
3851 TREE_PUBLIC (fn) = 1;
3852 DECL_ARTIFICIAL (fn) = 1;
3853 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3854 SET_DECL_LANGUAGE (fn, lang_c);
3855 /* Runtime library routines are, by definition, available in an
3856 external shared object. */
3857 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3858 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3862 /* Returns the _DECL for a library function with C linkage.
3863 We assume that such functions never throw; if this is incorrect,
3864 callers should unset TREE_NOTHROW. */
3867 build_library_fn (tree name, tree type)
3869 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3870 TREE_NOTHROW (fn) = 1;
3874 /* Returns the _DECL for a library function with C++ linkage. */
3877 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3879 tree fn = build_library_fn_1 (name, operator_code, type);
3880 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3881 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3882 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3886 /* Like build_library_fn, but takes a C string instead of an
3890 build_library_fn_ptr (const char* name, tree type)
3892 return build_library_fn (get_identifier (name), type);
3895 /* Like build_cp_library_fn, but takes a C string instead of an
3899 build_cp_library_fn_ptr (const char* name, tree type)
3901 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3904 /* Like build_library_fn, but also pushes the function so that we will
3905 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
3906 may throw exceptions listed in RAISES. */
3909 push_library_fn (tree name, tree type, tree raises)
3914 type = build_exception_variant (type, raises);
3916 fn = build_library_fn (name, type);
3917 pushdecl_top_level (fn);
3921 /* Like build_cp_library_fn, but also pushes the function so that it
3922 will be found by normal lookup. */
3925 push_cp_library_fn (enum tree_code operator_code, tree type)
3927 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3934 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3938 push_void_library_fn (tree name, tree parmtypes)
3940 tree type = build_function_type (void_type_node, parmtypes);
3941 return push_library_fn (name, type, NULL_TREE);
3944 /* Like push_library_fn, but also note that this function throws
3945 and does not return. Used for __throw_foo and the like. */
3948 push_throw_library_fn (tree name, tree type)
3950 tree fn = push_library_fn (name, type, NULL_TREE);
3951 TREE_THIS_VOLATILE (fn) = 1;
3952 TREE_NOTHROW (fn) = 0;
3956 /* When we call finish_struct for an anonymous union, we create
3957 default copy constructors and such. But, an anonymous union
3958 shouldn't have such things; this function undoes the damage to the
3959 anonymous union type T.
3961 (The reason that we create the synthesized methods is that we don't
3962 distinguish `union { int i; }' from `typedef union { int i; } U'.
3963 The first is an anonymous union; the second is just an ordinary
3967 fixup_anonymous_aggr (tree t)
3971 /* Wipe out memory of synthesized methods. */
3972 TYPE_HAS_USER_CONSTRUCTOR (t) = 0;
3973 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3974 TYPE_HAS_COPY_CTOR (t) = 0;
3975 TYPE_HAS_CONST_COPY_CTOR (t) = 0;
3976 TYPE_HAS_COPY_ASSIGN (t) = 0;
3977 TYPE_HAS_CONST_COPY_ASSIGN (t) = 0;
3979 /* Splice the implicitly generated functions out of the TYPE_METHODS
3981 q = &TYPE_METHODS (t);
3984 if (DECL_ARTIFICIAL (*q))
3985 *q = TREE_CHAIN (*q);
3987 q = &DECL_CHAIN (*q);
3990 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3991 if (TYPE_METHODS (t))
3993 tree decl = TYPE_MAIN_DECL (t);
3995 if (TREE_CODE (t) != UNION_TYPE)
3996 error_at (DECL_SOURCE_LOCATION (decl),
3997 "an anonymous struct cannot have function members");
3999 error_at (DECL_SOURCE_LOCATION (decl),
4000 "an anonymous union cannot have function members");
4003 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4004 assignment operators (because they cannot have these methods themselves).
4005 For anonymous unions this is already checked because they are not allowed
4006 in any union, otherwise we have to check it. */
4007 if (TREE_CODE (t) != UNION_TYPE)
4011 for (field = TYPE_FIELDS (t); field; field = DECL_CHAIN (field))
4012 if (TREE_CODE (field) == FIELD_DECL)
4014 type = TREE_TYPE (field);
4015 if (CLASS_TYPE_P (type))
4017 if (TYPE_NEEDS_CONSTRUCTING (type))
4018 error ("member %q+#D with constructor not allowed "
4019 "in anonymous aggregate", field);
4020 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
4021 error ("member %q+#D with destructor not allowed "
4022 "in anonymous aggregate", field);
4023 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type))
4024 error ("member %q+#D with copy assignment operator "
4025 "not allowed in anonymous aggregate", field);
4031 /* Make sure that a declaration with no declarator is well-formed, i.e.
4032 just declares a tagged type or anonymous union.
4034 Returns the type declared; or NULL_TREE if none. */
4037 check_tag_decl (cp_decl_specifier_seq *declspecs)
4039 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
4040 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
4041 /* If a class, struct, or enum type is declared by the DECLSPECS
4042 (i.e, if a class-specifier, enum-specifier, or non-typename
4043 elaborated-type-specifier appears in the DECLSPECS),
4044 DECLARED_TYPE is set to the corresponding type. */
4045 tree declared_type = NULL_TREE;
4046 bool error_p = false;
4048 if (declspecs->multiple_types_p)
4049 error ("multiple types in one declaration");
4050 else if (declspecs->redefined_builtin_type)
4052 if (!in_system_header)
4053 permerror (input_location, "redeclaration of C++ built-in type %qT",
4054 declspecs->redefined_builtin_type);
4059 && TYPE_P (declspecs->type)
4060 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
4061 && MAYBE_CLASS_TYPE_P (declspecs->type))
4062 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
4063 declared_type = declspecs->type;
4064 else if (declspecs->type == error_mark_node)
4066 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
4067 permerror (input_location, "declaration does not declare anything");
4068 /* Check for an anonymous union. */
4069 else if (declared_type && RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type))
4070 && TYPE_ANONYMOUS_P (declared_type))
4072 /* 7/3 In a simple-declaration, the optional init-declarator-list
4073 can be omitted only when declaring a class (clause 9) or
4074 enumeration (7.2), that is, when the decl-specifier-seq contains
4075 either a class-specifier, an elaborated-type-specifier with
4076 a class-key (9.1), or an enum-specifier. In these cases and
4077 whenever a class-specifier or enum-specifier is present in the
4078 decl-specifier-seq, the identifiers in these specifiers are among
4079 the names being declared by the declaration (as class-name,
4080 enum-names, or enumerators, depending on the syntax). In such
4081 cases, and except for the declaration of an unnamed bit-field (9.6),
4082 the decl-specifier-seq shall introduce one or more names into the
4083 program, or shall redeclare a name introduced by a previous
4084 declaration. [Example:
4085 enum { }; // ill-formed
4086 typedef class { }; // ill-formed
4090 error ("missing type-name in typedef-declaration");
4093 /* Anonymous unions are objects, so they can have specifiers. */;
4094 SET_ANON_AGGR_TYPE_P (declared_type);
4096 if (TREE_CODE (declared_type) != UNION_TYPE && !in_system_header)
4097 pedwarn (input_location, OPT_pedantic, "ISO C++ prohibits anonymous structs");
4102 if (declspecs->specs[(int)ds_inline]
4103 || declspecs->specs[(int)ds_virtual])
4104 error ("%qs can only be specified for functions",
4105 declspecs->specs[(int)ds_inline]
4106 ? "inline" : "virtual");
4108 && (!current_class_type
4109 || current_scope () != current_class_type))
4110 error ("%<friend%> can only be specified inside a class");
4111 else if (declspecs->specs[(int)ds_explicit])
4112 error ("%<explicit%> can only be specified for constructors");
4113 else if (declspecs->storage_class)
4114 error ("a storage class can only be specified for objects "
4116 else if (declspecs->specs[(int)ds_const]
4117 || declspecs->specs[(int)ds_volatile]
4118 || declspecs->specs[(int)ds_restrict]
4119 || declspecs->specs[(int)ds_thread])
4120 error ("qualifiers can only be specified for objects "
4122 else if (saw_typedef)
4123 warning (0, "%<typedef%> was ignored in this declaration");
4124 else if (declspecs->specs[(int) ds_constexpr])
4125 error ("%<constexpr%> cannot be used for type declarations");
4128 return declared_type;
4131 /* Called when a declaration is seen that contains no names to declare.
4132 If its type is a reference to a structure, union or enum inherited
4133 from a containing scope, shadow that tag name for the current scope
4134 with a forward reference.
4135 If its type defines a new named structure or union
4136 or defines an enum, it is valid but we need not do anything here.
4137 Otherwise, it is an error.
4139 C++: may have to grok the declspecs to learn about static,
4140 complain for anonymous unions.
4142 Returns the TYPE declared -- or NULL_TREE if none. */
4145 shadow_tag (cp_decl_specifier_seq *declspecs)
4147 tree t = check_tag_decl (declspecs);
4152 if (declspecs->attributes)
4154 warning (0, "attribute ignored in declaration of %q+#T", t);
4155 warning (0, "attribute for %q+#T must follow the %qs keyword",
4156 t, class_key_or_enum_as_string (t));
4160 if (maybe_process_partial_specialization (t) == error_mark_node)
4163 /* This is where the variables in an anonymous union are
4164 declared. An anonymous union declaration looks like:
4166 because there is no declarator after the union, the parser
4167 sends that declaration here. */
4168 if (ANON_AGGR_TYPE_P (t))
4170 fixup_anonymous_aggr (t);
4172 if (TYPE_FIELDS (t))
4174 tree decl = grokdeclarator (/*declarator=*/NULL,
4175 declspecs, NORMAL, 0, NULL);
4176 finish_anon_union (decl);
4183 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4186 groktypename (cp_decl_specifier_seq *type_specifiers,
4187 const cp_declarator *declarator,
4188 bool is_template_arg)
4192 enum decl_context context
4193 = is_template_arg ? TEMPLATE_TYPE_ARG : TYPENAME;
4194 attrs = type_specifiers->attributes;
4195 type_specifiers->attributes = NULL_TREE;
4196 type = grokdeclarator (declarator, type_specifiers, context, 0, &attrs);
4197 if (attrs && type != error_mark_node)
4199 if (CLASS_TYPE_P (type))
4200 warning (OPT_Wattributes, "ignoring attributes applied to class type %qT "
4201 "outside of definition", type);
4202 else if (MAYBE_CLASS_TYPE_P (type))
4203 /* A template type parameter or other dependent type. */
4204 warning (OPT_Wattributes, "ignoring attributes applied to dependent "
4205 "type %qT without an associated declaration", type);
4207 cplus_decl_attributes (&type, attrs, 0);
4212 /* Process a DECLARATOR for a function-scope variable declaration,
4213 namespace-scope variable declaration, or function declaration.
4214 (Function definitions go through start_function; class member
4215 declarations appearing in the body of the class go through
4216 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4217 If an error occurs, the error_mark_node is returned instead.
4219 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4220 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4221 for an explicitly defaulted function, or SD_DELETED for an explicitly
4222 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4223 implicitly initialized via a default constructor. ATTRIBUTES and
4224 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4225 *PUSHED_SCOPE_P is set to the scope entered in this function, if any; if
4226 set, the caller is responsible for calling pop_scope. */
4229 start_decl (const cp_declarator *declarator,
4230 cp_decl_specifier_seq *declspecs,
4233 tree prefix_attributes,
4234 tree *pushed_scope_p)
4242 *pushed_scope_p = NULL_TREE;
4244 /* An object declared as __attribute__((deprecated)) suppresses
4245 warnings of uses of other deprecated items. */
4246 if (lookup_attribute ("deprecated", attributes))
4247 deprecated_state = DEPRECATED_SUPPRESS;
4249 attributes = chainon (attributes, prefix_attributes);
4251 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
4254 deprecated_state = DEPRECATED_NORMAL;
4256 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
4257 || decl == error_mark_node)
4258 return error_mark_node;
4260 context = CP_DECL_CONTEXT (decl);
4261 if (context != global_namespace)
4262 *pushed_scope_p = push_scope (context);
4265 /* Is it valid for this decl to have an initializer at all?
4266 If not, set INITIALIZED to zero, which will indirectly
4267 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4268 switch (TREE_CODE (decl))
4271 error ("typedef %qD is initialized (use decltype instead)", decl);
4272 return error_mark_node;
4275 if (initialized == SD_DELETED)
4276 /* We'll handle the rest of the semantics later, but we need to
4277 set this now so it's visible to duplicate_decls. */
4278 DECL_DELETED_FN (decl) = 1;
4287 if (! toplevel_bindings_p ()
4288 && DECL_EXTERNAL (decl))
4289 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4291 DECL_EXTERNAL (decl) = 0;
4292 if (toplevel_bindings_p ())
4293 TREE_STATIC (decl) = 1;
4295 alias = lookup_attribute ("alias", DECL_ATTRIBUTES (decl)) != 0;
4297 if (alias && TREE_CODE (decl) == FUNCTION_DECL)
4298 record_key_method_defined (decl);
4300 /* If this is a typedef that names the class for linkage purposes
4301 (7.1.3p8), apply any attributes directly to the type. */
4302 if (TREE_CODE (decl) == TYPE_DECL
4303 && TAGGED_TYPE_P (TREE_TYPE (decl))
4304 && decl == TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl))))
4305 flags = ATTR_FLAG_TYPE_IN_PLACE;
4309 /* Set attributes here so if duplicate decl, will have proper attributes. */
4310 cplus_decl_attributes (&decl, attributes, flags);
4312 /* Dllimported symbols cannot be defined. Static data members (which
4313 can be initialized in-class and dllimported) go through grokfield,
4314 not here, so we don't need to exclude those decls when checking for
4316 if (initialized && DECL_DLLIMPORT_P (decl))
4318 error ("definition of %q#D is marked %<dllimport%>", decl);
4319 DECL_DLLIMPORT_P (decl) = 0;
4322 /* If #pragma weak was used, mark the decl weak now. */
4323 maybe_apply_pragma_weak (decl);
4325 if (TREE_CODE (decl) == FUNCTION_DECL
4326 && DECL_DECLARED_INLINE_P (decl)
4327 && DECL_UNINLINABLE (decl)
4328 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
4329 warning (0, "inline function %q+D given attribute noinline", decl);
4331 if (TYPE_P (context) && COMPLETE_TYPE_P (complete_type (context)))
4333 if (TREE_CODE (decl) == VAR_DECL)
4335 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
4336 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
4337 error ("%q#D is not a static member of %q#T", decl, context);
4340 if (DECL_CONTEXT (field) != context)
4342 if (!same_type_p (DECL_CONTEXT (field), context))
4343 permerror (input_location, "ISO C++ does not permit %<%T::%D%> "
4344 "to be defined as %<%T::%D%>",
4345 DECL_CONTEXT (field), DECL_NAME (decl),
4346 context, DECL_NAME (decl));
4347 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
4349 if (processing_specialization
4350 && template_class_depth (context) == 0
4351 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
4352 error ("template header not allowed in member definition "
4353 "of explicitly specialized class");
4354 /* Static data member are tricky; an in-class initialization
4355 still doesn't provide a definition, so the in-class
4356 declaration will have DECL_EXTERNAL set, but will have an
4357 initialization. Thus, duplicate_decls won't warn
4358 about this situation, and so we check here. */
4359 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
4360 error ("duplicate initialization of %qD", decl);
4361 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
4363 if (declspecs->specs[(int) ds_constexpr]
4364 && !DECL_DECLARED_CONSTEXPR_P (field))
4365 error ("%qD declared %<constexpr%> outside its class", field);
4370 tree field = check_classfn (context, decl,
4371 (processing_template_decl
4372 > template_class_depth (context))
4373 ? current_template_parms
4375 if (field && field != error_mark_node
4376 && duplicate_decls (decl, field,
4377 /*newdecl_is_friend=*/false))
4381 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4382 DECL_IN_AGGR_P (decl) = 0;
4383 /* Do not mark DECL as an explicit specialization if it was not
4384 already marked as an instantiation; a declaration should
4385 never be marked as a specialization unless we know what
4386 template is being specialized. */
4387 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
4389 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
4391 /* [temp.expl.spec] An explicit specialization of a static data
4392 member of a template is a definition if the declaration
4393 includes an initializer; otherwise, it is a declaration.
4395 We check for processing_specialization so this only applies
4396 to the new specialization syntax. */
4397 if (!initialized && processing_specialization)
4398 DECL_EXTERNAL (decl) = 1;
4401 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl)
4402 /* Aliases are definitions. */
4404 permerror (input_location, "declaration of %q#D outside of class is not definition",
4408 was_public = TREE_PUBLIC (decl);
4410 /* Enter this declaration into the symbol table. */
4411 decl = maybe_push_decl (decl);
4413 if (processing_template_decl)
4414 decl = push_template_decl (decl);
4415 if (decl == error_mark_node)
4416 return error_mark_node;
4418 /* Tell the back end to use or not use .common as appropriate. If we say
4419 -fconserve-space, we want this to save .data space, at the expense of
4420 wrong semantics. If we say -fno-conserve-space, we want this to
4421 produce errors about redefs; to do this we force variables into the
4423 if (flag_conserve_space
4424 && TREE_CODE (decl) == VAR_DECL
4425 && TREE_PUBLIC (decl)
4426 && !DECL_THREAD_LOCAL_P (decl)
4427 && !have_global_bss_p ())
4428 DECL_COMMON (decl) = 1;
4430 if (TREE_CODE (decl) == VAR_DECL
4431 && DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl) && !was_public
4432 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
4434 /* This is a const variable with implicit 'static'. Set
4435 DECL_THIS_STATIC so we can tell it from variables that are
4436 !TREE_PUBLIC because of the anonymous namespace. */
4437 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl)) || errorcount);
4438 DECL_THIS_STATIC (decl) = 1;
4441 if (!processing_template_decl && TREE_CODE (decl) == VAR_DECL)
4442 start_decl_1 (decl, initialized);
4447 /* Process the declaration of a variable DECL. INITIALIZED is true
4448 iff DECL is explicitly initialized. (INITIALIZED is false if the
4449 variable is initialized via an implicitly-called constructor.)
4450 This function must be called for ordinary variables (including, for
4451 example, implicit instantiations of templates), but must not be
4452 called for template declarations. */
4455 start_decl_1 (tree decl, bool initialized)
4459 bool aggregate_definition_p;
4461 gcc_assert (!processing_template_decl);
4463 if (error_operand_p (decl))
4466 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4468 type = TREE_TYPE (decl);
4469 complete_p = COMPLETE_TYPE_P (type);
4470 aggregate_definition_p = MAYBE_CLASS_TYPE_P (type) && !DECL_EXTERNAL (decl);
4472 /* If an explicit initializer is present, or if this is a definition
4473 of an aggregate, then we need a complete type at this point.
4474 (Scalars are always complete types, so there is nothing to
4475 check.) This code just sets COMPLETE_P; errors (if necessary)
4476 are issued below. */
4477 if ((initialized || aggregate_definition_p)
4479 && COMPLETE_TYPE_P (complete_type (type)))
4482 /* We will not yet have set TREE_READONLY on DECL if the type
4483 was "const", but incomplete, before this point. But, now, we
4484 have a complete type, so we can try again. */
4485 cp_apply_type_quals_to_decl (cp_type_quals (type), decl);
4489 /* Is it valid for this decl to have an initializer at all? */
4491 /* Don't allow initializations for incomplete types except for
4492 arrays which might be completed by the initialization. */
4494 ; /* A complete type is ok. */
4495 else if (type_uses_auto (type))
4496 ; /* An auto type is ok. */
4497 else if (TREE_CODE (type) != ARRAY_TYPE)
4499 error ("variable %q#D has initializer but incomplete type", decl);
4500 type = TREE_TYPE (decl) = error_mark_node;
4502 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4504 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4505 error ("elements of array %q#D have incomplete type", decl);
4506 /* else we already gave an error in start_decl. */
4509 else if (aggregate_definition_p && !complete_p)
4511 if (type_uses_auto (type))
4512 error ("declaration of %q#D has no initializer", decl);
4514 error ("aggregate %q#D has incomplete type and cannot be defined",
4516 /* Change the type so that assemble_variable will give
4517 DECL an rtl we can live with: (mem (const_int 0)). */
4518 type = TREE_TYPE (decl) = error_mark_node;
4521 /* Create a new scope to hold this declaration if necessary.
4522 Whether or not a new scope is necessary cannot be determined
4523 until after the type has been completed; if the type is a
4524 specialization of a class template it is not until after
4525 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4526 will be set correctly. */
4527 maybe_push_cleanup_level (type);
4530 /* Handle initialization of references. DECL, TYPE, and INIT have the
4531 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4532 but will be set to a new CLEANUP_STMT if a temporary is created
4533 that must be destroyed subsequently.
4535 Returns an initializer expression to use to initialize DECL, or
4536 NULL if the initialization can be performed statically.
4538 Quotes on semantics can be found in ARM 8.4.3. */
4541 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4545 if (init == NULL_TREE)
4547 if ((DECL_LANG_SPECIFIC (decl) == 0
4548 || DECL_IN_AGGR_P (decl) == 0)
4549 && ! DECL_THIS_EXTERN (decl))
4550 error ("%qD declared as reference but not initialized", decl);
4554 if (TREE_CODE (init) == TREE_LIST)
4555 init = build_x_compound_expr_from_list (init, ELK_INIT,
4556 tf_warning_or_error);
4558 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4559 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4560 /* Note: default conversion is only called in very special cases. */
4561 init = decay_conversion (init);
4563 /* Convert INIT to the reference type TYPE. This may involve the
4564 creation of a temporary, whose lifetime must be the same as that
4565 of the reference. If so, a DECL_EXPR for the temporary will be
4566 added just after the DECL_EXPR for DECL. That's why we don't set
4567 DECL_INITIAL for local references (instead assigning to them
4568 explicitly); we need to allow the temporary to be initialized
4570 tmp = initialize_reference (type, init, decl, cleanup, tf_warning_or_error);
4572 if (tmp == error_mark_node)
4574 else if (tmp == NULL_TREE)
4576 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4580 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4583 DECL_INITIAL (decl) = tmp;
4588 /* Subroutine of check_initializer. We're initializing a DECL of
4589 std::initializer_list<T> TYPE from a braced-init-list INIT, and need to
4590 extend the lifetime of the underlying array to match that of the decl,
4591 just like for reference initialization. CLEANUP is as for
4592 grok_reference_init. */
4595 build_init_list_var_init (tree decl, tree type, tree init, tree *array_init,
4598 tree aggr_init, array, arrtype;
4599 init = perform_implicit_conversion (type, init, tf_warning_or_error);
4600 if (error_operand_p (init))
4601 return error_mark_node;
4603 aggr_init = TARGET_EXPR_INITIAL (init);
4604 array = CONSTRUCTOR_ELT (aggr_init, 0)->value;
4605 arrtype = TREE_TYPE (array);
4607 gcc_assert (TREE_CODE (array) == ADDR_EXPR);
4608 array = TREE_OPERAND (array, 0);
4609 /* If the array is constant, finish_compound_literal already made it a
4610 static variable and we don't need to do anything here. */
4611 if (decl && TREE_CODE (array) == TARGET_EXPR)
4613 tree var = set_up_extended_ref_temp (decl, array, cleanup, array_init);
4614 var = build_address (var);
4615 var = convert (arrtype, var);
4616 CONSTRUCTOR_ELT (aggr_init, 0)->value = var;
4621 /* Designated initializers in arrays are not supported in GNU C++.
4622 The parser cannot detect this error since it does not know whether
4623 a given brace-enclosed initializer is for a class type or for an
4624 array. This function checks that CE does not use a designated
4625 initializer. If it does, an error is issued. Returns true if CE
4626 is valid, i.e., does not have a designated initializer. */
4629 check_array_designated_initializer (const constructor_elt *ce)
4631 /* Designated initializers for array elements are not supported. */
4634 /* The parser only allows identifiers as designated
4636 if (ce->index == error_mark_node)
4637 error ("name used in a GNU-style designated "
4638 "initializer for an array");
4639 else if (TREE_CODE (ce->index) == INTEGER_CST)
4640 /* An index added by reshape_init. */
4644 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4645 error ("name %qD used in a GNU-style designated "
4646 "initializer for an array", ce->index);
4654 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4655 array until we finish parsing the initializer. If that's the
4656 situation we're in, update DECL accordingly. */
4659 maybe_deduce_size_from_array_init (tree decl, tree init)
4661 tree type = TREE_TYPE (decl);
4663 if (TREE_CODE (type) == ARRAY_TYPE
4664 && TYPE_DOMAIN (type) == NULL_TREE
4665 && TREE_CODE (decl) != TYPE_DECL)
4667 /* do_default is really a C-ism to deal with tentative definitions.
4668 But let's leave it here to ease the eventual merge. */
4669 int do_default = !DECL_EXTERNAL (decl);
4670 tree initializer = init ? init : DECL_INITIAL (decl);
4673 /* Check that there are no designated initializers in INIT, as
4674 those are not supported in GNU C++, and as the middle-end
4675 will crash if presented with a non-numeric designated
4677 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4679 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4680 constructor_elt *ce;
4682 FOR_EACH_VEC_ELT (constructor_elt, v, i, ce)
4683 if (!check_array_designated_initializer (ce))
4689 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4693 error ("initializer fails to determine size of %qD", decl);
4694 TREE_TYPE (decl) = error_mark_node;
4696 else if (failure == 2)
4700 error ("array size missing in %qD", decl);
4701 TREE_TYPE (decl) = error_mark_node;
4703 /* If a `static' var's size isn't known, make it extern as
4704 well as static, so it does not get allocated. If it's not
4705 `static', then don't mark it extern; finish_incomplete_decl
4706 will give it a default size and it will get allocated. */
4707 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4708 DECL_EXTERNAL (decl) = 1;
4710 else if (failure == 3)
4712 error ("zero-size array %qD", decl);
4713 TREE_TYPE (decl) = error_mark_node;
4717 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4719 relayout_decl (decl);
4723 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4724 any appropriate error messages regarding the layout. */
4727 layout_var_decl (tree decl)
4731 type = TREE_TYPE (decl);
4732 if (type == error_mark_node)
4735 /* If we haven't already layed out this declaration, do so now.
4736 Note that we must not call complete type for an external object
4737 because it's type might involve templates that we are not
4738 supposed to instantiate yet. (And it's perfectly valid to say
4739 `extern X x' for some incomplete type `X'.) */
4740 if (!DECL_EXTERNAL (decl))
4741 complete_type (type);
4742 if (!DECL_SIZE (decl)
4743 && TREE_TYPE (decl) != error_mark_node
4744 && (COMPLETE_TYPE_P (type)
4745 || (TREE_CODE (type) == ARRAY_TYPE
4746 && !TYPE_DOMAIN (type)
4747 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4748 layout_decl (decl, 0);
4750 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4752 /* An automatic variable with an incomplete type: that is an error.
4753 Don't talk about array types here, since we took care of that
4754 message in grokdeclarator. */
4755 error ("storage size of %qD isn%'t known", decl);
4756 TREE_TYPE (decl) = error_mark_node;
4759 /* Keep this code around in case we later want to control debug info
4760 based on whether a type is "used". (jason 1999-11-11) */
4762 else if (!DECL_EXTERNAL (decl) && MAYBE_CLASS_TYPE_P (ttype))
4763 /* Let debugger know it should output info for this type. */
4764 note_debug_info_needed (ttype);
4766 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4767 note_debug_info_needed (DECL_CONTEXT (decl));
4770 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4771 && DECL_SIZE (decl) != NULL_TREE
4772 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4774 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4775 constant_expression_warning (DECL_SIZE (decl));
4778 error ("storage size of %qD isn%'t constant", decl);
4779 TREE_TYPE (decl) = error_mark_node;
4784 /* If a local static variable is declared in an inline function, or if
4785 we have a weak definition, we must endeavor to create only one
4786 instance of the variable at link-time. */
4789 maybe_commonize_var (tree decl)
4791 /* Static data in a function with comdat linkage also has comdat
4793 if (TREE_STATIC (decl)
4794 /* Don't mess with __FUNCTION__. */
4795 && ! DECL_ARTIFICIAL (decl)
4796 && DECL_FUNCTION_SCOPE_P (decl)
4797 && vague_linkage_p (DECL_CONTEXT (decl)))
4801 /* With weak symbols, we simply make the variable COMDAT;
4802 that will cause copies in multiple translations units to
4804 comdat_linkage (decl);
4808 if (DECL_INITIAL (decl) == NULL_TREE
4809 || DECL_INITIAL (decl) == error_mark_node)
4811 /* Without weak symbols, we can use COMMON to merge
4812 uninitialized variables. */
4813 TREE_PUBLIC (decl) = 1;
4814 DECL_COMMON (decl) = 1;
4818 /* While for initialized variables, we must use internal
4819 linkage -- which means that multiple copies will not
4821 TREE_PUBLIC (decl) = 0;
4822 DECL_COMMON (decl) = 0;
4823 warning_at (input_location, 0,
4824 "sorry: semantics of inline function static "
4825 "data %q+#D are wrong (you%'ll wind up "
4826 "with multiple copies)", decl);
4827 warning_at (DECL_SOURCE_LOCATION (decl), 0,
4828 " you can work around this by removing "
4833 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4834 /* Set it up again; we might have set DECL_INITIAL since the last
4836 comdat_linkage (decl);
4839 /* Issue an error message if DECL is an uninitialized const variable. */
4842 check_for_uninitialized_const_var (tree decl)
4844 tree type = strip_array_types (TREE_TYPE (decl));
4846 /* ``Unless explicitly declared extern, a const object does not have
4847 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4849 if (TREE_CODE (decl) == VAR_DECL
4850 && TREE_CODE (type) != REFERENCE_TYPE
4851 && CP_TYPE_CONST_P (type)
4852 && (!TYPE_NEEDS_CONSTRUCTING (type)
4853 || !type_has_user_provided_default_constructor (type))
4854 && !DECL_INITIAL (decl))
4856 permerror (DECL_SOURCE_LOCATION (decl),
4857 "uninitialized const %qD", decl);
4859 if (CLASS_TYPE_P (type)
4860 && !type_has_user_provided_default_constructor (type))
4862 tree defaulted_ctor;
4864 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type)),
4865 "%q#T has no user-provided default constructor", type);
4866 defaulted_ctor = in_class_defaulted_default_constructor (type);
4868 inform (DECL_SOURCE_LOCATION (defaulted_ctor),
4869 "constructor is not user-provided because it is "
4870 "explicitly defaulted in the class body");
4875 /* Structure holding the current initializer being processed by reshape_init.
4876 CUR is a pointer to the current element being processed, END is a pointer
4877 after the last element present in the initializer. */
4878 typedef struct reshape_iterator_t
4880 constructor_elt *cur;
4881 constructor_elt *end;
4884 static tree reshape_init_r (tree, reshape_iter *, bool, tsubst_flags_t);
4886 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4887 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4888 initialized. If there are no more such fields, the return value
4892 next_initializable_field (tree field)
4895 && (TREE_CODE (field) != FIELD_DECL
4896 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4897 || DECL_ARTIFICIAL (field)))
4898 field = DECL_CHAIN (field);
4903 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4904 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4905 INTEGER_CST representing the size of the array minus one (the maximum index),
4906 or NULL_TREE if the array was declared without specifying the size. D is
4907 the iterator within the constructor. */
4910 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d,
4911 tsubst_flags_t complain)
4914 bool sized_array_p = (max_index != NULL_TREE);
4915 unsigned HOST_WIDE_INT max_index_cst = 0;
4916 unsigned HOST_WIDE_INT index;
4918 /* The initializer for an array is always a CONSTRUCTOR. */
4919 new_init = build_constructor (init_list_type_node, NULL);
4923 /* Minus 1 is used for zero sized arrays. */
4924 if (integer_all_onesp (max_index))
4927 if (host_integerp (max_index, 1))
4928 max_index_cst = tree_low_cst (max_index, 1);
4929 /* sizetype is sign extended, not zero extended. */
4931 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4935 /* Loop until there are no more initializers. */
4937 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4942 check_array_designated_initializer (d->cur);
4943 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false,
4945 if (elt_init == error_mark_node)
4946 return error_mark_node;
4947 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init),
4948 size_int (index), elt_init);
4949 if (!TREE_CONSTANT (elt_init))
4950 TREE_CONSTANT (new_init) = false;
4956 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4957 Parameters are the same of reshape_init_r. */
4960 reshape_init_array (tree type, reshape_iter *d, tsubst_flags_t complain)
4962 tree max_index = NULL_TREE;
4964 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4966 if (TYPE_DOMAIN (type))
4967 max_index = array_type_nelts (type);
4969 return reshape_init_array_1 (TREE_TYPE (type), max_index, d, complain);
4972 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4973 Parameters are the same of reshape_init_r. */
4976 reshape_init_vector (tree type, reshape_iter *d, tsubst_flags_t complain)
4978 tree max_index = NULL_TREE;
4980 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4982 if (COMPOUND_LITERAL_P (d->cur->value))
4984 tree value = d->cur->value;
4985 if (!same_type_p (TREE_TYPE (value), type))
4987 if (complain & tf_error)
4988 error ("invalid type %qT as initializer for a vector of type %qT",
4989 TREE_TYPE (d->cur->value), type);
4990 value = error_mark_node;
4996 /* For a vector, we initialize it as an array of the appropriate size. */
4997 if (TREE_CODE (type) == VECTOR_TYPE)
4998 max_index = size_int (TYPE_VECTOR_SUBPARTS (type) - 1);
5000 return reshape_init_array_1 (TREE_TYPE (type), max_index, d, complain);
5003 /* Subroutine of reshape_init_r, processes the initializers for classes
5004 or union. Parameters are the same of reshape_init_r. */
5007 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p,
5008 tsubst_flags_t complain)
5013 gcc_assert (CLASS_TYPE_P (type));
5015 /* The initializer for a class is always a CONSTRUCTOR. */
5016 new_init = build_constructor (init_list_type_node, NULL);
5017 field = next_initializable_field (TYPE_FIELDS (type));
5023 An initializer for an aggregate member that is an
5024 empty class shall have the form of an empty
5025 initializer-list {}. */
5026 if (!first_initializer_p)
5028 if (complain & tf_error)
5029 error ("initializer for %qT must be brace-enclosed", type);
5030 return error_mark_node;
5035 /* Loop through the initializable fields, gathering initializers. */
5036 while (d->cur != d->end)
5040 /* Handle designated initializers, as an extension. */
5043 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
5045 if (!field || TREE_CODE (field) != FIELD_DECL)
5047 if (complain & tf_error)
5048 error ("%qT has no non-static data member named %qD", type,
5050 return error_mark_node;
5054 /* If we processed all the member of the class, we are done. */
5058 field_init = reshape_init_r (TREE_TYPE (field), d,
5059 /*first_initializer_p=*/false, complain);
5060 if (field_init == error_mark_node)
5061 return error_mark_node;
5063 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
5067 When a union is initialized with a brace-enclosed
5068 initializer, the braces shall only contain an
5069 initializer for the first member of the union. */
5070 if (TREE_CODE (type) == UNION_TYPE)
5073 field = next_initializable_field (DECL_CHAIN (field));
5079 /* Subroutine of reshape_init, which processes a single initializer (part of
5080 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5081 iterator within the CONSTRUCTOR which points to the initializer to process.
5082 FIRST_INITIALIZER_P is true if this is the first initializer of the
5083 outermost CONSTRUCTOR node. */
5086 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p,
5087 tsubst_flags_t complain)
5089 tree init = d->cur->value;
5091 if (error_operand_p (init))
5092 return error_mark_node;
5094 if (TREE_CODE (type) == COMPLEX_TYPE)
5096 /* A complex type can be initialized from one or two initializers,
5097 but braces are not elided. */
5099 if (BRACE_ENCLOSED_INITIALIZER_P (init))
5101 if (CONSTRUCTOR_NELTS (init) > 2)
5103 if (complain & tf_error)
5104 error ("too many initializers for %qT", type);
5106 return error_mark_node;
5109 else if (first_initializer_p && d->cur != d->end)
5111 VEC(constructor_elt, gc) *v = 0;
5112 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, init);
5113 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, d->cur->value);
5115 init = build_constructor (init_list_type_node, v);
5120 /* A non-aggregate type is always initialized with a single
5122 if (!CP_AGGREGATE_TYPE_P (type))
5124 /* It is invalid to initialize a non-aggregate type with a
5125 brace-enclosed initializer before C++0x.
5126 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5127 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5128 a CONSTRUCTOR (with a record type). */
5129 if (TREE_CODE (init) == CONSTRUCTOR
5130 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
5132 if (SCALAR_TYPE_P (type))
5134 if (complain & tf_error)
5135 error ("braces around scalar initializer for type %qT", type);
5136 init = error_mark_node;
5139 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
5148 All implicit type conversions (clause _conv_) are considered when
5149 initializing the aggregate member with an initializer from an
5150 initializer-list. If the initializer can initialize a member,
5151 the member is initialized. Otherwise, if the member is itself a
5152 non-empty subaggregate, brace elision is assumed and the
5153 initializer is considered for the initialization of the first
5154 member of the subaggregate. */
5155 if (TREE_CODE (init) != CONSTRUCTOR
5156 /* But don't try this for the first initializer, since that would be
5157 looking through the outermost braces; A a2 = { a1 }; is not a
5158 valid aggregate initialization. */
5159 && !first_initializer_p
5160 && (same_type_ignoring_top_level_qualifiers_p (type, TREE_TYPE (init))
5161 || can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL)))
5167 /* [dcl.init.string]
5169 A char array (whether plain char, signed char, or unsigned char)
5170 can be initialized by a string-literal (optionally enclosed in
5171 braces); a wchar_t array can be initialized by a wide
5172 string-literal (optionally enclosed in braces). */
5173 if (TREE_CODE (type) == ARRAY_TYPE
5174 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
5176 tree str_init = init;
5178 /* Strip one level of braces if and only if they enclose a single
5179 element (as allowed by [dcl.init.string]). */
5180 if (!first_initializer_p
5181 && TREE_CODE (str_init) == CONSTRUCTOR
5182 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
5184 str_init = VEC_index (constructor_elt,
5185 CONSTRUCTOR_ELTS (str_init), 0)->value;
5188 /* If it's a string literal, then it's the initializer for the array
5189 as a whole. Otherwise, continue with normal initialization for
5190 array types (one value per array element). */
5191 if (TREE_CODE (str_init) == STRING_CST)
5198 /* The following cases are about aggregates. If we are not within a full
5199 initializer already, and there is not a CONSTRUCTOR, it means that there
5200 is a missing set of braces (that is, we are processing the case for
5201 which reshape_init exists). */
5202 if (!first_initializer_p)
5204 if (TREE_CODE (init) == CONSTRUCTOR)
5206 if (TREE_TYPE (init) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init)))
5207 /* There is no need to reshape pointer-to-member function
5208 initializers, as they are always constructed correctly
5209 by the front end. */
5211 else if (COMPOUND_LITERAL_P (init))
5212 /* For a nested compound literal, there is no need to reshape since
5213 brace elision is not allowed. Even if we decided to allow it,
5214 we should add a call to reshape_init in finish_compound_literal,
5215 before calling digest_init, so changing this code would still
5216 not be necessary. */
5217 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
5221 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5222 return reshape_init (type, init, complain);
5226 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
5230 /* Dispatch to specialized routines. */
5231 if (CLASS_TYPE_P (type))
5232 return reshape_init_class (type, d, first_initializer_p, complain);
5233 else if (TREE_CODE (type) == ARRAY_TYPE)
5234 return reshape_init_array (type, d, complain);
5235 else if (TREE_CODE (type) == VECTOR_TYPE)
5236 return reshape_init_vector (type, d, complain);
5241 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5242 brace-enclosed aggregate initializer.
5244 INIT is the CONSTRUCTOR containing the list of initializers describing
5245 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5246 It may not presently match the shape of the TYPE; for example:
5248 struct S { int a; int b; };
5249 struct S a[] = { 1, 2, 3, 4 };
5251 Here INIT will hold a VEC of four elements, rather than a
5252 VEC of two elements, each itself a VEC of two elements. This
5253 routine transforms INIT from the former form into the latter. The
5254 revised CONSTRUCTOR node is returned. */
5257 reshape_init (tree type, tree init, tsubst_flags_t complain)
5259 VEC(constructor_elt, gc) *v;
5263 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5265 v = CONSTRUCTOR_ELTS (init);
5267 /* An empty constructor does not need reshaping, and it is always a valid
5269 if (VEC_empty (constructor_elt, v))
5272 /* Recurse on this CONSTRUCTOR. */
5273 d.cur = VEC_index (constructor_elt, v, 0);
5274 d.end = d.cur + VEC_length (constructor_elt, v);
5276 new_init = reshape_init_r (type, &d, true, complain);
5277 if (new_init == error_mark_node)
5278 return error_mark_node;
5280 /* Make sure all the element of the constructor were used. Otherwise,
5281 issue an error about exceeding initializers. */
5284 if (complain & tf_error)
5285 error ("too many initializers for %qT", type);
5287 return error_mark_node;
5293 /* Verify array initializer. Returns true if errors have been reported. */
5296 check_array_initializer (tree decl, tree type, tree init)
5298 tree element_type = TREE_TYPE (type);
5300 /* The array type itself need not be complete, because the
5301 initializer may tell us how many elements are in the array.
5302 But, the elements of the array must be complete. */
5303 if (!COMPLETE_TYPE_P (complete_type (element_type)))
5306 error ("elements of array %q#D have incomplete type", decl);
5308 error ("elements of array %q#T have incomplete type", type);
5311 /* It is not valid to initialize a VLA. */
5313 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
5314 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
5317 error ("variable-sized object %qD may not be initialized", decl);
5319 error ("variable-sized compound literal");
5325 /* Subroutine of check_initializer; args are passed down from that function.
5326 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5329 build_aggr_init_full_exprs (tree decl, tree init, int flags)
5332 int saved_stmts_are_full_exprs_p = 0;
5333 if (building_stmt_tree ())
5335 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5336 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5338 init = build_aggr_init (decl, init, flags, tf_warning_or_error);
5339 if (building_stmt_tree ())
5340 current_stmt_tree ()->stmts_are_full_exprs_p =
5341 saved_stmts_are_full_exprs_p;
5345 /* Verify INIT (the initializer for DECL), and record the
5346 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5347 grok_reference_init.
5349 If the return value is non-NULL, it is an expression that must be
5350 evaluated dynamically to initialize DECL. */
5353 check_initializer (tree decl, tree init, int flags, tree *cleanup)
5355 tree type = TREE_TYPE (decl);
5356 tree init_code = NULL;
5357 tree extra_init = NULL_TREE;
5360 /* Things that are going to be initialized need to have complete
5362 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
5364 if (type == error_mark_node)
5365 /* We will have already complained. */
5368 if (TREE_CODE (type) == ARRAY_TYPE)
5370 if (check_array_initializer (decl, type, init))
5373 else if (!COMPLETE_TYPE_P (type))
5375 error ("%qD has incomplete type", decl);
5376 TREE_TYPE (decl) = error_mark_node;
5380 /* There is no way to make a variable-sized class type in GNU C++. */
5381 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
5383 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5385 int init_len = VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init));
5386 if (SCALAR_TYPE_P (type))
5390 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
5391 init = build_zero_init (type, NULL_TREE, false);
5393 else if (init_len != 1 && TREE_CODE (type) != COMPLEX_TYPE)
5395 error ("scalar object %qD requires one element in initializer",
5397 TREE_TYPE (decl) = error_mark_node;
5403 if (TREE_CODE (decl) == CONST_DECL)
5405 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
5407 DECL_INITIAL (decl) = init;
5409 gcc_assert (init != NULL_TREE);
5412 else if (!init && DECL_REALLY_EXTERN (decl))
5414 else if (TREE_CODE (type) == REFERENCE_TYPE)
5415 init = grok_reference_init (decl, type, init, cleanup);
5416 else if (init || type_build_ctor_call (type))
5419 check_for_uninitialized_const_var (decl);
5420 /* Do not reshape constructors of vectors (they don't need to be
5422 else if (BRACE_ENCLOSED_INITIALIZER_P (init))
5424 if (is_std_init_list (type))
5425 init = build_init_list_var_init (decl, type, init,
5426 &extra_init, cleanup);
5427 else if (TYPE_NON_AGGREGATE_CLASS (type))
5429 /* Don't reshape if the class has constructors. */
5430 if (cxx_dialect == cxx98)
5431 error ("in C++98 %qD must be initialized by constructor, "
5435 else if (TREE_CODE (type) == VECTOR_TYPE && TYPE_VECTOR_OPAQUE (type))
5437 error ("opaque vector types cannot be initialized");
5438 init = error_mark_node;
5441 init = reshape_init (type, init, tf_warning_or_error);
5444 /* If DECL has an array type without a specific bound, deduce the
5445 array size from the initializer. */
5446 maybe_deduce_size_from_array_init (decl, init);
5447 type = TREE_TYPE (decl);
5448 if (type == error_mark_node)
5451 if (type_build_ctor_call (type)
5452 || (CLASS_TYPE_P (type)
5453 && !(init && BRACE_ENCLOSED_INITIALIZER_P (init))))
5455 init_code = build_aggr_init_full_exprs (decl, init, flags);
5457 /* If this is a constexpr initializer, expand_default_init will
5458 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5459 case, pull the initializer back out and pass it down into
5460 store_init_value. */
5461 while (TREE_CODE (init_code) == EXPR_STMT
5462 || TREE_CODE (init_code) == CONVERT_EXPR)
5463 init_code = TREE_OPERAND (init_code, 0);
5464 if (TREE_CODE (init_code) == INIT_EXPR)
5466 init = TREE_OPERAND (init_code, 1);
5467 init_code = NULL_TREE;
5468 /* Don't call digest_init; it's unnecessary and will complain
5469 about aggregate initialization of non-aggregate classes. */
5470 flags |= LOOKUP_ALREADY_DIGESTED;
5472 else if (DECL_DECLARED_CONSTEXPR_P (decl))
5474 /* Declared constexpr, but no suitable initializer; massage
5475 init appropriately so we can pass it into store_init_value
5477 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5478 init = finish_compound_literal (type, init,
5479 tf_warning_or_error);
5480 else if (CLASS_TYPE_P (type)
5481 && (!init || TREE_CODE (init) == TREE_LIST))
5483 init = build_functional_cast (type, init, tf_none);
5484 if (init != error_mark_node)
5485 TARGET_EXPR_DIRECT_INIT_P (init) = true;
5487 init_code = NULL_TREE;
5493 if (init && TREE_CODE (init) != TREE_VEC)
5495 init_code = store_init_value (decl, init, flags);
5496 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
5497 && DECL_INITIAL (decl)
5498 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
5499 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
5500 warning (0, "array %qD initialized by parenthesized string literal %qE",
5501 decl, DECL_INITIAL (decl));
5507 if (CLASS_TYPE_P (core_type = strip_array_types (type))
5508 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type)
5509 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type)))
5510 diagnose_uninitialized_cst_or_ref_member (core_type, /*using_new=*/false,
5513 check_for_uninitialized_const_var (decl);
5516 if (init && init != error_mark_node)
5517 init_code = build2 (INIT_EXPR, type, decl, init);
5520 init_code = add_stmt_to_compound (extra_init, init_code);
5522 if (init_code && DECL_IN_AGGR_P (decl))
5524 static int explained = 0;
5526 if (cxx_dialect < cxx0x)
5527 error ("initializer invalid for static member with constructor");
5529 error ("non-constant in-class initialization invalid for static "
5530 "member %qD", decl);
5533 error ("(an out of class initialization is required)");
5541 /* If DECL is not a local variable, give it RTL. */
5544 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
5546 int toplev = toplevel_bindings_p ();
5548 const char *filename;
5550 /* Set the DECL_ASSEMBLER_NAME for the object. */
5553 /* The `register' keyword, when used together with an
5554 asm-specification, indicates that the variable should be
5555 placed in a particular register. */
5556 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
5558 set_user_assembler_name (decl, asmspec);
5559 DECL_HARD_REGISTER (decl) = 1;
5563 if (TREE_CODE (decl) == FUNCTION_DECL
5564 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
5565 set_builtin_user_assembler_name (decl, asmspec);
5566 set_user_assembler_name (decl, asmspec);
5570 /* Handle non-variables up front. */
5571 if (TREE_CODE (decl) != VAR_DECL)
5573 rest_of_decl_compilation (decl, toplev, at_eof);
5577 /* If we see a class member here, it should be a static data
5579 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
5581 gcc_assert (TREE_STATIC (decl));
5582 /* An in-class declaration of a static data member should be
5583 external; it is only a declaration, and not a definition. */
5584 if (init == NULL_TREE)
5585 gcc_assert (DECL_EXTERNAL (decl) || !TREE_PUBLIC (decl));
5588 /* We don't create any RTL for local variables. */
5589 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5592 /* We defer emission of local statics until the corresponding
5593 DECL_EXPR is expanded. */
5594 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
5596 /* We try to defer namespace-scope static constants so that they are
5597 not emitted into the object file unnecessarily. */
5598 filename = input_filename;
5599 if (!DECL_VIRTUAL_P (decl)
5600 && TREE_READONLY (decl)
5601 && DECL_INITIAL (decl) != NULL_TREE
5602 && DECL_INITIAL (decl) != error_mark_node
5604 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
5606 && !TREE_PUBLIC (decl))
5608 /* Fool with the linkage of static consts according to #pragma
5610 struct c_fileinfo *finfo = get_fileinfo (filename);
5611 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
5613 TREE_PUBLIC (decl) = 1;
5614 DECL_EXTERNAL (decl) = finfo->interface_only;
5619 /* Likewise for template instantiations. */
5620 else if (DECL_LANG_SPECIFIC (decl)
5621 && DECL_IMPLICIT_INSTANTIATION (decl))
5624 /* If we're not deferring, go ahead and assemble the variable. */
5626 rest_of_decl_compilation (decl, toplev, at_eof);
5629 /* walk_tree helper for wrap_temporary_cleanups, below. */
5632 wrap_cleanups_r (tree *stmt_p, int *walk_subtrees, void *data)
5634 if (TYPE_P (*stmt_p))
5640 if (TREE_CODE (*stmt_p) == TARGET_EXPR)
5642 tree guard = (tree)data;
5643 tree tcleanup = TARGET_EXPR_CLEANUP (*stmt_p);
5645 tcleanup = build2 (TRY_CATCH_EXPR, void_type_node, tcleanup, guard);
5646 /* Tell honor_protect_cleanup_actions to handle this as a separate
5648 TRY_CATCH_IS_CLEANUP (tcleanup) = 1;
5650 TARGET_EXPR_CLEANUP (*stmt_p) = tcleanup;
5656 /* We're initializing a local variable which has a cleanup GUARD. If there
5657 are any temporaries used in the initializer INIT of this variable, we
5658 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5659 variable will be cleaned up properly if one of them throws.
5661 Unfortunately, there's no way to express this properly in terms of
5662 nesting, as the regions for the temporaries overlap the region for the
5663 variable itself; if there are two temporaries, the variable needs to be
5664 the first thing destroyed if either of them throws. However, we only
5665 want to run the variable's cleanup if it actually got constructed. So
5666 we need to guard the temporary cleanups with the variable's cleanup if
5667 they are run on the normal path, but not if they are run on the
5668 exceptional path. We implement this by telling
5669 honor_protect_cleanup_actions to strip the variable cleanup from the
5670 exceptional path. */
5673 wrap_temporary_cleanups (tree init, tree guard)
5675 cp_walk_tree_without_duplicates (&init, wrap_cleanups_r, (void *)guard);
5678 /* Generate code to initialize DECL (a local variable). */
5681 initialize_local_var (tree decl, tree init)
5683 tree type = TREE_TYPE (decl);
5687 gcc_assert (TREE_CODE (decl) == VAR_DECL
5688 || TREE_CODE (decl) == RESULT_DECL);
5689 gcc_assert (!TREE_STATIC (decl));
5691 if (DECL_SIZE (decl) == NULL_TREE)
5693 /* If we used it already as memory, it must stay in memory. */
5694 DECL_INITIAL (decl) = NULL_TREE;
5695 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
5699 if (type == error_mark_node)
5702 /* Compute and store the initial value. */
5703 already_used = TREE_USED (decl) || TREE_USED (type);
5704 if (TREE_USED (type))
5705 DECL_READ_P (decl) = 1;
5707 /* Generate a cleanup, if necessary. */
5708 cleanup = cxx_maybe_build_cleanup (decl, tf_warning_or_error);
5710 /* Perform the initialization. */
5713 if (TREE_CODE (init) == INIT_EXPR
5714 && !TREE_SIDE_EFFECTS (TREE_OPERAND (init, 1)))
5716 /* Stick simple initializers in DECL_INITIAL so that
5717 -Wno-init-self works (c++/34772). */
5718 gcc_assert (TREE_OPERAND (init, 0) == decl);
5719 DECL_INITIAL (decl) = TREE_OPERAND (init, 1);
5723 int saved_stmts_are_full_exprs_p;
5725 /* If we're only initializing a single object, guard the
5726 destructors of any temporaries used in its initializer with
5727 its destructor. This isn't right for arrays because each
5728 element initialization is a full-expression. */
5729 if (cleanup && TREE_CODE (type) != ARRAY_TYPE)
5730 wrap_temporary_cleanups (init, cleanup);
5732 gcc_assert (building_stmt_tree ());
5733 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5734 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5735 finish_expr_stmt (init);
5736 current_stmt_tree ()->stmts_are_full_exprs_p =
5737 saved_stmts_are_full_exprs_p;
5741 /* Set this to 0 so we can tell whether an aggregate which was
5742 initialized was ever used. Don't do this if it has a
5743 destructor, so we don't complain about the 'resource
5744 allocation is initialization' idiom. Now set
5745 attribute((unused)) on types so decls of that type will be
5746 marked used. (see TREE_USED, above.) */
5747 if (TYPE_NEEDS_CONSTRUCTING (type)
5749 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5750 && DECL_NAME (decl))
5751 TREE_USED (decl) = 0;
5752 else if (already_used)
5753 TREE_USED (decl) = 1;
5756 finish_decl_cleanup (decl, cleanup);
5759 /* DECL is a VAR_DECL for a compiler-generated variable with static
5760 storage duration (like a virtual table) whose initializer is a
5761 compile-time constant. Initialize the variable and provide it to the
5765 initialize_artificial_var (tree decl, VEC(constructor_elt,gc) *v)
5768 gcc_assert (DECL_ARTIFICIAL (decl));
5769 init = build_constructor (TREE_TYPE (decl), v);
5770 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5771 DECL_INITIAL (decl) = init;
5772 DECL_INITIALIZED_P (decl) = 1;
5773 determine_visibility (decl);
5774 layout_var_decl (decl);
5775 maybe_commonize_var (decl);
5776 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5779 /* INIT is the initializer for a variable, as represented by the
5780 parser. Returns true iff INIT is type-dependent. */
5783 type_dependent_init_p (tree init)
5785 if (TREE_CODE (init) == TREE_LIST)
5786 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5787 return any_type_dependent_elements_p (init);
5788 else if (TREE_CODE (init) == CONSTRUCTOR)
5789 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5791 VEC(constructor_elt, gc) *elts;
5795 elts = CONSTRUCTOR_ELTS (init);
5796 nelts = VEC_length (constructor_elt, elts);
5797 for (i = 0; i < nelts; ++i)
5798 if (type_dependent_init_p (VEC_index (constructor_elt,
5803 /* It must be a simple expression, e.g., int i = 3; */
5804 return type_dependent_expression_p (init);
5809 /* INIT is the initializer for a variable, as represented by the
5810 parser. Returns true iff INIT is value-dependent. */
5813 value_dependent_init_p (tree init)
5815 if (TREE_CODE (init) == TREE_LIST)
5816 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5817 return any_value_dependent_elements_p (init);
5818 else if (TREE_CODE (init) == CONSTRUCTOR)
5819 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5821 VEC(constructor_elt, gc) *elts;
5825 elts = CONSTRUCTOR_ELTS (init);
5826 nelts = VEC_length (constructor_elt, elts);
5827 for (i = 0; i < nelts; ++i)
5828 if (value_dependent_init_p (VEC_index (constructor_elt,
5833 /* It must be a simple expression, e.g., int i = 3; */
5834 return value_dependent_expression_p (init);
5839 /* Finish processing of a declaration;
5840 install its line number and initial value.
5841 If the length of an array type is not known before,
5842 it must be determined now, from the initial value, or it is an error.
5844 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5845 true, then INIT is an integral constant expression.
5847 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5848 if the (init) syntax was used. */
5851 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5852 tree asmspec_tree, int flags)
5856 const char *asmspec = NULL;
5857 int was_readonly = 0;
5858 bool var_definition_p = false;
5861 if (decl == error_mark_node)
5866 error ("assignment (not initialization) in declaration");
5870 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5871 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5872 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5874 type = TREE_TYPE (decl);
5875 if (type == error_mark_node)
5878 /* Assume no cleanup is required. */
5879 cleanup = NULL_TREE;
5881 /* If a name was specified, get the string. */
5882 if (global_scope_p (current_binding_level))
5883 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5884 if (asmspec_tree && asmspec_tree != error_mark_node)
5885 asmspec = TREE_STRING_POINTER (asmspec_tree);
5887 if (current_class_type
5888 && CP_DECL_CONTEXT (decl) == current_class_type
5889 && TYPE_BEING_DEFINED (current_class_type)
5890 && (DECL_INITIAL (decl) || init))
5891 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5893 auto_node = type_uses_auto (type);
5897 if (init == NULL_TREE)
5899 error ("declaration of %q#D has no initializer", decl);
5900 TREE_TYPE (decl) = error_mark_node;
5904 if (TREE_CODE (d_init) == TREE_LIST)
5905 d_init = build_x_compound_expr_from_list (d_init, ELK_INIT,
5906 tf_warning_or_error);
5907 d_init = resolve_nondeduced_context (d_init);
5908 if (describable_type (d_init))
5910 type = TREE_TYPE (decl) = do_auto_deduction (type, d_init,
5912 if (type == error_mark_node)
5917 if (!ensure_literal_type_for_constexpr_object (decl))
5918 DECL_DECLARED_CONSTEXPR_P (decl) = 0;
5920 if (init && TREE_CODE (decl) == FUNCTION_DECL)
5923 if (init == ridpointers[(int)RID_DELETE])
5925 /* FIXME check this is 1st decl. */
5926 DECL_DELETED_FN (decl) = 1;
5927 DECL_DECLARED_INLINE_P (decl) = 1;
5928 DECL_INITIAL (decl) = error_mark_node;
5929 FOR_EACH_CLONE (clone, decl)
5931 DECL_DELETED_FN (clone) = 1;
5932 DECL_DECLARED_INLINE_P (clone) = 1;
5933 DECL_INITIAL (clone) = error_mark_node;
5937 else if (init == ridpointers[(int)RID_DEFAULT])
5939 if (defaultable_fn_check (decl))
5940 DECL_DEFAULTED_FN (decl) = 1;
5942 DECL_INITIAL (decl) = NULL_TREE;
5946 if (init && TREE_CODE (decl) == VAR_DECL)
5948 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5949 if (init_const_expr_p)
5951 /* Set these flags now for templates. We'll update the flags in
5952 store_init_value for instantiations. */
5953 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5954 if (decl_maybe_constant_var_p (decl))
5955 TREE_CONSTANT (decl) = 1;
5959 if (processing_template_decl)
5961 bool type_dependent_p;
5963 /* Add this declaration to the statement-tree. */
5964 if (at_function_scope_p ())
5965 add_decl_expr (decl);
5967 type_dependent_p = dependent_type_p (type);
5969 if (check_for_bare_parameter_packs (init))
5972 DECL_INITIAL (decl) = NULL_TREE;
5975 /* Generally, initializers in templates are expanded when the
5976 template is instantiated. But, if DECL is a variable constant
5977 then it can be used in future constant expressions, so its value
5978 must be available. */
5980 if (TREE_CODE (decl) != VAR_DECL || dependent_type_p (type))
5981 /* We can't do anything if the decl has dependent type. */;
5983 && init_const_expr_p
5984 && !type_dependent_p
5985 && decl_maybe_constant_var_p (decl)
5986 && !type_dependent_init_p (init)
5987 && !value_dependent_init_p (init))
5989 /* This variable seems to be a non-dependent constant, so process
5990 its initializer. If check_initializer returns non-null the
5991 initialization wasn't constant after all. */
5992 tree init_code = check_initializer (decl, init, flags, &cleanup);
5993 if (init_code == NULL_TREE)
5996 else if (!DECL_PRETTY_FUNCTION_P (decl))
5997 /* Deduce array size even if the initializer is dependent. */
5998 maybe_deduce_size_from_array_init (decl, init);
6001 DECL_INITIAL (decl) = init;
6005 /* Take care of TYPE_DECLs up front. */
6006 if (TREE_CODE (decl) == TYPE_DECL)
6008 if (type != error_mark_node
6009 && MAYBE_CLASS_TYPE_P (type) && DECL_NAME (decl))
6011 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
6012 warning (0, "shadowing previous type declaration of %q#D", decl);
6013 set_identifier_type_value (DECL_NAME (decl), decl);
6016 /* If we have installed this as the canonical typedef for this
6017 type, and that type has not been defined yet, delay emitting
6018 the debug information for it, as we will emit it later. */
6019 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
6020 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
6021 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
6023 rest_of_decl_compilation (decl, DECL_FILE_SCOPE_P (decl),
6028 /* A reference will be modified here, as it is initialized. */
6029 if (! DECL_EXTERNAL (decl)
6030 && TREE_READONLY (decl)
6031 && TREE_CODE (type) == REFERENCE_TYPE)
6034 TREE_READONLY (decl) = 0;
6037 if (TREE_CODE (decl) == VAR_DECL)
6039 /* Only variables with trivial initialization and destruction can
6040 have thread-local storage. */
6041 if (DECL_THREAD_LOCAL_P (decl)
6042 && (type_has_nontrivial_default_init (TREE_TYPE (decl))
6043 || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
6044 error ("%qD cannot be thread-local because it has non-trivial "
6045 "type %qT", decl, TREE_TYPE (decl));
6046 /* If this is a local variable that will need a mangled name,
6047 register it now. We must do this before processing the
6048 initializer for the variable, since the initialization might
6049 require a guard variable, and since the mangled name of the
6050 guard variable will depend on the mangled name of this
6052 if (DECL_FUNCTION_SCOPE_P (decl)
6053 && TREE_STATIC (decl)
6054 && !DECL_ARTIFICIAL (decl))
6056 push_local_name (decl);
6057 if (DECL_CONSTRUCTOR_P (current_function_decl)
6058 || DECL_DESTRUCTOR_P (current_function_decl))
6059 /* Normally local_decls is populated during GIMPLE lowering,
6060 but [cd]tors are never actually compiled directly. We need
6061 to put statics on the list so we can deal with the label
6062 address extension. */
6063 add_local_decl (cfun, decl);
6066 /* Convert the initializer to the type of DECL, if we have not
6067 already initialized DECL. */
6068 if (!DECL_INITIALIZED_P (decl)
6069 /* If !DECL_EXTERNAL then DECL is being defined. In the
6070 case of a static data member initialized inside the
6071 class-specifier, there can be an initializer even if DECL
6072 is *not* defined. */
6073 && (!DECL_EXTERNAL (decl) || init))
6075 if (TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
6078 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6079 /* Allow libjava/prims.cc define primitive classes. */
6080 if (init != NULL_TREE
6081 || jclass == NULL_TREE
6082 || TREE_CODE (jclass) != TYPE_DECL
6083 || !POINTER_TYPE_P (TREE_TYPE (jclass))
6084 || !same_type_ignoring_top_level_qualifiers_p
6085 (type, TREE_TYPE (TREE_TYPE (jclass))))
6086 error ("Java object %qD not allocated with %<new%>", decl);
6089 init = check_initializer (decl, init, flags, &cleanup);
6090 /* Thread-local storage cannot be dynamically initialized. */
6091 if (DECL_THREAD_LOCAL_P (decl) && init)
6093 error ("%qD is thread-local and so cannot be dynamically "
6094 "initialized", decl);
6098 /* Check that the initializer for a static data member was a
6099 constant. Although we check in the parser that the
6100 initializer is an integral constant expression, we do not
6101 simplify division-by-zero at the point at which it
6102 occurs. Therefore, in:
6104 struct S { static const int i = 7 / 0; };
6106 we issue an error at this point. It would
6107 probably be better to forbid division by zero in
6108 integral constant expressions. */
6109 if (DECL_EXTERNAL (decl) && init)
6111 error ("%qD cannot be initialized by a non-constant expression"
6112 " when being declared", decl);
6113 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
6121 The memory occupied by any object of static storage
6122 duration is zero-initialized at program startup before
6123 any other initialization takes place.
6125 We cannot create an appropriate initializer until after
6126 the type of DECL is finalized. If DECL_INITIAL is set,
6127 then the DECL is statically initialized, and any
6128 necessary zero-initialization has already been performed. */
6129 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
6130 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
6131 /*nelts=*/NULL_TREE,
6132 /*static_storage_p=*/true);
6133 /* Remember that the initialization for this variable has
6135 DECL_INITIALIZED_P (decl) = 1;
6136 /* This declaration is the definition of this variable,
6137 unless we are initializing a static data member within
6138 the class specifier. */
6139 if (!DECL_EXTERNAL (decl))
6140 var_definition_p = true;
6142 /* If the variable has an array type, lay out the type, even if
6143 there is no initializer. It is valid to index through the
6144 array, and we must get TYPE_ALIGN set correctly on the array
6146 else if (TREE_CODE (type) == ARRAY_TYPE)
6149 if (TREE_STATIC (decl)
6150 && !at_function_scope_p ()
6151 && current_function_decl == NULL)
6152 /* So decl is a global variable or a static member of a
6153 non local class. Record the types it uses
6154 so that we can decide later to emit debug info for them. */
6155 record_types_used_by_current_var_decl (decl);
6157 else if (TREE_CODE (decl) == FIELD_DECL
6158 && TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
6159 error ("non-static data member %qD has Java class type", decl);
6161 /* Add this declaration to the statement-tree. This needs to happen
6162 after the call to check_initializer so that the DECL_EXPR for a
6163 reference temp is added before the DECL_EXPR for the reference itself. */
6164 if (at_function_scope_p ())
6165 add_decl_expr (decl);
6167 /* Let the middle end know about variables and functions -- but not
6168 static data members in uninstantiated class templates. */
6169 if (TREE_CODE (decl) == VAR_DECL
6170 || TREE_CODE (decl) == FUNCTION_DECL)
6172 if (TREE_CODE (decl) == VAR_DECL)
6174 layout_var_decl (decl);
6175 maybe_commonize_var (decl);
6178 /* This needs to happen after the linkage is set. */
6179 determine_visibility (decl);
6181 if (var_definition_p && TREE_STATIC (decl))
6183 /* If a TREE_READONLY variable needs initialization
6184 at runtime, it is no longer readonly and we need to
6185 avoid MEM_READONLY_P being set on RTL created for it. */
6188 if (TREE_READONLY (decl))
6189 TREE_READONLY (decl) = 0;
6192 else if (was_readonly)
6193 TREE_READONLY (decl) = 1;
6196 make_rtl_for_nonlocal_decl (decl, init, asmspec);
6198 /* Check for abstractness of the type. Notice that there is no
6199 need to strip array types here since the check for those types
6200 is already done within create_array_type_for_decl. */
6201 if (TREE_CODE (type) == FUNCTION_TYPE
6202 || TREE_CODE (type) == METHOD_TYPE)
6203 abstract_virtuals_error (decl, TREE_TYPE (type));
6205 abstract_virtuals_error (decl, type);
6207 if (TREE_TYPE (decl) == error_mark_node)
6208 /* No initialization required. */
6210 else if (TREE_CODE (decl) == FUNCTION_DECL)
6214 if (init == ridpointers[(int)RID_DEFAULT])
6216 /* An out-of-class default definition is defined at
6217 the point where it is explicitly defaulted. */
6218 if (DECL_DELETED_FN (decl))
6219 maybe_explain_implicit_delete (decl);
6220 else if (DECL_INITIAL (decl) == error_mark_node)
6221 synthesize_method (decl);
6224 error ("function %q#D is initialized like a variable", decl);
6226 /* else no initialization required. */
6228 else if (DECL_EXTERNAL (decl)
6229 && ! (DECL_LANG_SPECIFIC (decl)
6230 && DECL_NOT_REALLY_EXTERN (decl)))
6233 DECL_INITIAL (decl) = init;
6235 /* A variable definition. */
6236 else if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
6237 /* Initialize the local variable. */
6238 initialize_local_var (decl, init);
6240 /* If a variable is defined, and then a subsequent
6241 definition with external linkage is encountered, we will
6242 get here twice for the same variable. We want to avoid
6243 calling expand_static_init more than once. For variables
6244 that are not static data members, we can call
6245 expand_static_init only when we actually process the
6246 initializer. It is not legal to redeclare a static data
6247 member, so this issue does not arise in that case. */
6248 else if (var_definition_p && TREE_STATIC (decl))
6249 expand_static_init (decl, init);
6252 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6253 reference, insert it in the statement-tree now. */
6255 push_cleanup (decl, cleanup, false);
6258 TREE_READONLY (decl) = 1;
6261 /* Returns a declaration for a VAR_DECL as if:
6263 extern "C" TYPE NAME;
6265 had been seen. Used to create compiler-generated global
6269 declare_global_var (tree name, tree type)
6273 push_to_top_level ();
6274 decl = build_decl (input_location, VAR_DECL, name, type);
6275 TREE_PUBLIC (decl) = 1;
6276 DECL_EXTERNAL (decl) = 1;
6277 DECL_ARTIFICIAL (decl) = 1;
6278 /* If the user has explicitly declared this variable (perhaps
6279 because the code we are compiling is part of a low-level runtime
6280 library), then it is possible that our declaration will be merged
6281 with theirs by pushdecl. */
6282 decl = pushdecl (decl);
6283 cp_finish_decl (decl, NULL_TREE, false, NULL_TREE, 0);
6284 pop_from_top_level ();
6289 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6290 if "__cxa_atexit" is not being used) corresponding to the function
6291 to be called when the program exits. */
6294 get_atexit_fn_ptr_type (void)
6298 if (!atexit_fn_ptr_type_node)
6301 if (flag_use_cxa_atexit
6302 && !targetm.cxx.use_atexit_for_cxa_atexit ())
6303 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6304 arg_type = ptr_type_node;
6306 /* The parameter to "atexit" is "void (*)(void)". */
6307 arg_type = NULL_TREE;
6309 fn_type = build_function_type_list (void_type_node,
6310 arg_type, NULL_TREE);
6311 atexit_fn_ptr_type_node = build_pointer_type (fn_type);
6314 return atexit_fn_ptr_type_node;
6317 /* Returns a pointer to the `atexit' function. Note that if
6318 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6319 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6322 get_atexit_node (void)
6328 bool use_aeabi_atexit;
6333 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6335 /* The declaration for `__cxa_atexit' is:
6337 int __cxa_atexit (void (*)(void *), void *, void *)
6339 We build up the argument types and then the function type
6341 tree argtype0, argtype1, argtype2;
6343 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
6344 /* First, build the pointer-to-function type for the first
6346 fn_ptr_type = get_atexit_fn_ptr_type ();
6347 /* Then, build the rest of the argument types. */
6348 argtype2 = ptr_type_node;
6349 if (use_aeabi_atexit)
6351 argtype1 = fn_ptr_type;
6352 argtype0 = ptr_type_node;
6356 argtype1 = ptr_type_node;
6357 argtype0 = fn_ptr_type;
6359 /* And the final __cxa_atexit type. */
6360 fn_type = build_function_type_list (integer_type_node,
6361 argtype0, argtype1, argtype2,
6363 fn_ptr_type = build_pointer_type (fn_type);
6364 if (use_aeabi_atexit)
6365 name = "__aeabi_atexit";
6367 name = "__cxa_atexit";
6371 /* The declaration for `atexit' is:
6373 int atexit (void (*)());
6375 We build up the argument types and then the function type
6377 fn_ptr_type = get_atexit_fn_ptr_type ();
6378 /* Build the final atexit type. */
6379 fn_type = build_function_type_list (integer_type_node,
6380 fn_ptr_type, NULL_TREE);
6384 /* Now, build the function declaration. */
6385 push_lang_context (lang_name_c);
6386 atexit_fndecl = build_library_fn_ptr (name, fn_type);
6387 mark_used (atexit_fndecl);
6388 pop_lang_context ();
6389 atexit_node = decay_conversion (atexit_fndecl);
6394 /* Returns the __dso_handle VAR_DECL. */
6397 get_dso_handle_node (void)
6399 if (dso_handle_node)
6400 return dso_handle_node;
6402 /* Declare the variable. */
6403 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
6406 return dso_handle_node;
6409 /* Begin a new function with internal linkage whose job will be simply
6410 to destroy some particular variable. */
6412 static GTY(()) int start_cleanup_cnt;
6415 start_cleanup_fn (void)
6420 bool use_cxa_atexit = flag_use_cxa_atexit
6421 && !targetm.cxx.use_atexit_for_cxa_atexit ();
6423 push_to_top_level ();
6425 /* No need to mangle this. */
6426 push_lang_context (lang_name_c);
6428 /* Build the name of the function. */
6429 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
6430 /* Build the function declaration. */
6431 fntype = TREE_TYPE (get_atexit_fn_ptr_type ());
6432 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
6433 /* It's a function with internal linkage, generated by the
6435 TREE_PUBLIC (fndecl) = 0;
6436 DECL_ARTIFICIAL (fndecl) = 1;
6437 /* Make the function `inline' so that it is only emitted if it is
6438 actually needed. It is unlikely that it will be inlined, since
6439 it is only called via a function pointer, but we avoid unnecessary
6440 emissions this way. */
6441 DECL_DECLARED_INLINE_P (fndecl) = 1;
6442 DECL_INTERFACE_KNOWN (fndecl) = 1;
6443 /* Build the parameter. */
6448 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
6449 DECL_CONTEXT (parmdecl) = fndecl;
6450 TREE_USED (parmdecl) = 1;
6451 DECL_READ_P (parmdecl) = 1;
6452 DECL_ARGUMENTS (fndecl) = parmdecl;
6456 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
6458 pop_lang_context ();
6460 return current_function_decl;
6463 /* Finish the cleanup function begun by start_cleanup_fn. */
6466 end_cleanup_fn (void)
6468 expand_or_defer_fn (finish_function (0));
6470 pop_from_top_level ();
6473 /* Generate code to handle the destruction of DECL, an object with
6474 static storage duration. */
6477 register_dtor_fn (tree decl)
6484 tree arg0, arg1 = NULL_TREE, arg2 = NULL_TREE;
6486 type = TREE_TYPE (decl);
6487 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
6488 return void_zero_node;
6490 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6491 a class object, we can just pass the destructor to
6492 "__cxa_atexit"; we don't have to build a temporary function to do
6494 use_dtor = (flag_use_cxa_atexit
6495 && !targetm.cxx.use_atexit_for_cxa_atexit ()
6496 && CLASS_TYPE_P (type));
6501 /* Find the destructor. */
6502 idx = lookup_fnfields_1 (type, complete_dtor_identifier);
6503 gcc_assert (idx >= 0);
6504 cleanup = VEC_index (tree, CLASSTYPE_METHOD_VEC (type), idx);
6505 /* Make sure it is accessible. */
6506 perform_or_defer_access_check (TYPE_BINFO (type), cleanup, cleanup);
6510 /* Call build_cleanup before we enter the anonymous function so
6511 that any access checks will be done relative to the current
6512 scope, rather than the scope of the anonymous function. */
6513 build_cleanup (decl);
6515 /* Now start the function. */
6516 cleanup = start_cleanup_fn ();
6518 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6519 to the original function, rather than the anonymous one. That
6520 will make the back end think that nested functions are in use,
6521 which causes confusion. */
6522 push_deferring_access_checks (dk_no_check);
6523 fcall = build_cleanup (decl);
6524 pop_deferring_access_checks ();
6526 /* Create the body of the anonymous function. */
6527 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
6528 finish_expr_stmt (fcall);
6529 finish_compound_stmt (compound_stmt);
6533 /* Call atexit with the cleanup function. */
6534 mark_used (cleanup);
6535 cleanup = build_address (cleanup);
6536 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6542 /* We must convert CLEANUP to the type that "__cxa_atexit"
6544 cleanup = build_nop (get_atexit_fn_ptr_type (), cleanup);
6545 /* "__cxa_atexit" will pass the address of DECL to the
6546 cleanup function. */
6548 addr = build_address (decl);
6549 /* The declared type of the parameter to "__cxa_atexit" is
6550 "void *". For plain "T*", we could just let the
6551 machinery in cp_build_function_call convert it -- but if the
6552 type is "cv-qualified T *", then we need to convert it
6553 before passing it in, to avoid spurious errors. */
6554 addr = build_nop (ptr_type_node, addr);
6557 /* Since the cleanup functions we build ignore the address
6558 they're given, there's no reason to pass the actual address
6559 in, and, in general, it's cheaper to pass NULL than any
6561 addr = null_pointer_node;
6562 arg2 = cp_build_addr_expr (get_dso_handle_node (),
6563 tf_warning_or_error);
6564 if (targetm.cxx.use_aeabi_atexit ())
6577 return cp_build_function_call_nary (get_atexit_node (), tf_warning_or_error,
6578 arg0, arg1, arg2, NULL_TREE);
6581 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6582 is its initializer. Generate code to handle the construction
6583 and destruction of DECL. */
6586 expand_static_init (tree decl, tree init)
6588 gcc_assert (TREE_CODE (decl) == VAR_DECL);
6589 gcc_assert (TREE_STATIC (decl));
6591 /* Some variables require no dynamic initialization. */
6593 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
6596 if (DECL_FUNCTION_SCOPE_P (decl))
6598 /* Emit code to perform this initialization but once. */
6599 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
6600 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
6601 tree guard, guard_addr;
6602 tree acquire_fn, release_fn, abort_fn;
6605 /* Emit code to perform this initialization but once. This code
6608 static <type> guard;
6609 if (!guard.first_byte) {
6610 if (__cxa_guard_acquire (&guard)) {
6613 // Do initialization.
6614 flag = true; __cxa_guard_release (&guard);
6615 // Register variable for destruction at end of program.
6617 if (!flag) __cxa_guard_abort (&guard);
6621 Note that the `flag' variable is only set to 1 *after* the
6622 initialization is complete. This ensures that an exception,
6623 thrown during the construction, will cause the variable to
6624 reinitialized when we pass through this code again, as per:
6628 If the initialization exits by throwing an exception, the
6629 initialization is not complete, so it will be tried again
6630 the next time control enters the declaration.
6632 This process should be thread-safe, too; multiple threads
6633 should not be able to initialize the variable more than
6636 /* Create the guard variable. */
6637 guard = get_guard (decl);
6639 /* This optimization isn't safe on targets with relaxed memory
6640 consistency. On such targets we force synchronization in
6641 __cxa_guard_acquire. */
6642 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6644 /* Begin the conditional initialization. */
6645 if_stmt = begin_if_stmt ();
6646 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
6647 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6650 if (flag_threadsafe_statics)
6652 guard_addr = build_address (guard);
6654 acquire_fn = get_identifier ("__cxa_guard_acquire");
6655 release_fn = get_identifier ("__cxa_guard_release");
6656 abort_fn = get_identifier ("__cxa_guard_abort");
6657 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
6659 tree vfntype = build_function_type_list (void_type_node,
6660 TREE_TYPE (guard_addr),
6662 acquire_fn = push_library_fn
6663 (acquire_fn, build_function_type_list (integer_type_node,
6664 TREE_TYPE (guard_addr),
6667 release_fn = push_library_fn (release_fn, vfntype, NULL_TREE);
6668 abort_fn = push_library_fn (abort_fn, vfntype, NULL_TREE);
6672 release_fn = identifier_global_value (release_fn);
6673 abort_fn = identifier_global_value (abort_fn);
6676 inner_if_stmt = begin_if_stmt ();
6677 finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
6680 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6681 begin = get_target_expr (boolean_false_node);
6682 flag = TARGET_EXPR_SLOT (begin);
6684 TARGET_EXPR_CLEANUP (begin)
6685 = build3 (COND_EXPR, void_type_node, flag,
6687 build_call_n (abort_fn, 1, guard_addr));
6688 CLEANUP_EH_ONLY (begin) = 1;
6690 /* Do the initialization itself. */
6691 init = add_stmt_to_compound (begin, init);
6692 init = add_stmt_to_compound
6693 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
6694 init = add_stmt_to_compound
6695 (init, build_call_n (release_fn, 1, guard_addr));
6698 init = add_stmt_to_compound (init, set_guard (guard));
6700 /* Use atexit to register a function for destroying this static
6702 init = add_stmt_to_compound (init, register_dtor_fn (decl));
6704 finish_expr_stmt (init);
6706 if (flag_threadsafe_statics)
6708 finish_compound_stmt (inner_then_clause);
6709 finish_then_clause (inner_if_stmt);
6710 finish_if_stmt (inner_if_stmt);
6713 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6715 finish_compound_stmt (then_clause);
6716 finish_then_clause (if_stmt);
6717 finish_if_stmt (if_stmt);
6721 static_aggregates = tree_cons (init, decl, static_aggregates);
6725 /* Make TYPE a complete type based on INITIAL_VALUE.
6726 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6727 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6728 3 if the initializer list is empty (in pedantic mode). */
6731 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
6734 tree type, elt_type;
6738 unsigned HOST_WIDE_INT i;
6741 /* An array of character type can be initialized from a
6742 brace-enclosed string constant.
6744 FIXME: this code is duplicated from reshape_init. Probably
6745 we should just call reshape_init here? */
6746 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
6747 && TREE_CODE (initial_value) == CONSTRUCTOR
6748 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
6750 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
6751 tree value = VEC_index (constructor_elt, v, 0)->value;
6753 if (TREE_CODE (value) == STRING_CST
6754 && VEC_length (constructor_elt, v) == 1)
6755 initial_value = value;
6758 /* If any of the elements are parameter packs, we can't actually
6759 complete this type now because the array size is dependent. */
6760 if (TREE_CODE (initial_value) == CONSTRUCTOR)
6762 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value),
6765 if (PACK_EXPANSION_P (value))
6771 failure = complete_array_type (ptype, initial_value, do_default);
6773 /* We can create the array before the element type is complete, which
6774 means that we didn't have these two bits set in the original type
6775 either. In completing the type, we are expected to propagate these
6776 bits. See also complete_type which does the same thing for arrays
6779 if (TYPE_DOMAIN (type))
6781 elt_type = TREE_TYPE (type);
6782 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
6783 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
6784 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
6790 /* As above, but either give an error or reject zero-size arrays, depending
6794 cp_complete_array_type_or_error (tree *ptype, tree initial_value,
6795 bool do_default, tsubst_flags_t complain)
6798 bool sfinae = !(complain & tf_error);
6799 /* In SFINAE context we can't be lenient about zero-size arrays. */
6802 failure = cp_complete_array_type (ptype, initial_value, do_default);
6808 /* Not an error. */;
6809 else if (failure == 1)
6810 error ("initializer fails to determine size of %qT", *ptype);
6811 else if (failure == 2)
6814 error ("array size missing in %qT", *ptype);
6816 else if (failure == 3)
6817 error ("zero-size array %qT", *ptype);
6818 *ptype = error_mark_node;
6823 /* Return zero if something is declared to be a member of type
6824 CTYPE when in the context of CUR_TYPE. STRING is the error
6825 message to print in that case. Otherwise, quietly return 1. */
6828 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
6830 if (ctype && ctype != cur_type)
6832 if (flags == DTOR_FLAG)
6833 error ("destructor for alien class %qT cannot be a member", ctype);
6835 error ("constructor for alien class %qT cannot be a member", ctype);
6841 /* Subroutine of `grokdeclarator'. */
6843 /* Generate errors possibly applicable for a given set of specifiers.
6844 This is for ARM $7.1.2. */
6847 bad_specifiers (tree object,
6848 enum bad_spec_place type,
6859 error ("%qD declared as a %<virtual%> variable", object);
6861 error ("%qD declared as an %<inline%> variable", object);
6863 error ("%<const%> and %<volatile%> function specifiers on "
6864 "%qD invalid in variable declaration", object);
6868 error ("%qD declared as a %<virtual%> parameter", object);
6870 error ("%qD declared as an %<inline%> parameter", object);
6872 error ("%<const%> and %<volatile%> function specifiers on "
6873 "%qD invalid in parameter declaration", object);
6877 error ("%qD declared as a %<virtual%> type", object);
6879 error ("%qD declared as an %<inline%> type", object);
6881 error ("%<const%> and %<volatile%> function specifiers on "
6882 "%qD invalid in type declaration", object);
6886 error ("%qD declared as a %<virtual%> field", object);
6888 error ("%qD declared as an %<inline%> field", object);
6890 error ("%<const%> and %<volatile%> function specifiers on "
6891 "%qD invalid in field declaration", object);
6897 error ("%q+D declared as a friend", object);
6899 && (TREE_CODE (object) == TYPE_DECL
6900 || (!TYPE_PTRFN_P (TREE_TYPE (object))
6901 && !TYPE_REFFN_P (TREE_TYPE (object))
6902 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
6903 error ("%q+D declared with an exception specification", object);
6906 /* DECL is a member function or static data member and is presently
6907 being defined. Check that the definition is taking place in a
6911 check_class_member_definition_namespace (tree decl)
6913 /* These checks only apply to member functions and static data
6915 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
6916 || TREE_CODE (decl) == VAR_DECL);
6917 /* We check for problems with specializations in pt.c in
6918 check_specialization_namespace, where we can issue better
6920 if (processing_specialization)
6922 /* There are no restrictions on the placement of
6923 explicit instantiations. */
6924 if (processing_explicit_instantiation)
6928 A member function definition that appears outside of the
6929 class definition shall appear in a namespace scope enclosing
6930 the class definition.
6934 The definition for a static data member shall appear in a
6935 namespace scope enclosing the member's class definition. */
6936 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
6937 permerror (input_location, "definition of %qD is not in namespace enclosing %qT",
6938 decl, DECL_CONTEXT (decl));
6941 /* Build a PARM_DECL for the "this" parameter. TYPE is the
6942 METHOD_TYPE for a non-static member function; QUALS are the
6943 cv-qualifiers that apply to the function. */
6946 build_this_parm (tree type, cp_cv_quals quals)
6951 cp_cv_quals this_quals;
6953 this_type = type_of_this_parm (type);
6954 /* The `this' parameter is implicitly `const'; it cannot be
6956 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
6957 qual_type = cp_build_qualified_type (this_type, this_quals);
6958 parm = build_artificial_parm (this_identifier, qual_type);
6959 cp_apply_type_quals_to_decl (this_quals, parm);
6963 /* DECL is a static member function. Complain if it was declared
6964 with function-cv-quals. */
6967 check_static_quals (tree decl, cp_cv_quals quals)
6969 if (quals != TYPE_UNQUALIFIED)
6970 error ("static member function %q#D declared with type qualifiers",
6974 /* CTYPE is class type, or null if non-class.
6975 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
6977 DECLARATOR is the function's name.
6978 PARMS is a chain of PARM_DECLs for the function.
6979 VIRTUALP is truthvalue of whether the function is virtual or not.
6980 FLAGS are to be passed through to `grokclassfn'.
6981 QUALS are qualifiers indicating whether the function is `const'
6983 RAISES is a list of exceptions that this function can raise.
6984 CHECK is 1 if we must find this method in CTYPE, 0 if we should
6985 not look, and -1 if we should not call `grokclassfn' at all.
6987 SFK is the kind of special function (if any) for the new function.
6989 Returns `NULL_TREE' if something goes wrong, after issuing
6990 applicable error messages. */
6993 grokfndecl (tree ctype,
6997 tree orig_declarator,
6999 enum overload_flags flags,
7006 special_function_kind sfk,
7011 location_t location)
7014 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
7018 type = build_exception_variant (type, raises);
7020 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
7022 /* If we have an explicit location, use it, otherwise use whatever
7023 build_lang_decl used (probably input_location). */
7024 if (location != UNKNOWN_LOCATION)
7025 DECL_SOURCE_LOCATION (decl) = location;
7027 if (TREE_CODE (type) == METHOD_TYPE)
7030 parm = build_this_parm (type, quals);
7031 DECL_CHAIN (parm) = parms;
7034 DECL_ARGUMENTS (decl) = parms;
7035 for (t = parms; t; t = DECL_CHAIN (t))
7036 DECL_CONTEXT (t) = decl;
7037 /* Propagate volatile out from type to decl. */
7038 if (TYPE_VOLATILE (type))
7039 TREE_THIS_VOLATILE (decl) = 1;
7041 /* Setup decl according to sfk. */
7044 case sfk_constructor:
7045 case sfk_copy_constructor:
7046 case sfk_move_constructor:
7047 DECL_CONSTRUCTOR_P (decl) = 1;
7049 case sfk_destructor:
7050 DECL_DESTRUCTOR_P (decl) = 1;
7056 /* If pointers to member functions use the least significant bit to
7057 indicate whether a function is virtual, ensure a pointer
7058 to this function will have that bit clear. */
7059 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
7060 && TREE_CODE (type) == METHOD_TYPE
7061 && DECL_ALIGN (decl) < 2 * BITS_PER_UNIT)
7062 DECL_ALIGN (decl) = 2 * BITS_PER_UNIT;
7065 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
7069 ("defining explicit specialization %qD in friend declaration",
7073 tree fns = TREE_OPERAND (orig_declarator, 0);
7074 tree args = TREE_OPERAND (orig_declarator, 1);
7076 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7078 /* Something like `template <class T> friend void f<T>()'. */
7079 error ("invalid use of template-id %qD in declaration "
7080 "of primary template",
7086 /* A friend declaration of the form friend void f<>(). Record
7087 the information in the TEMPLATE_ID_EXPR. */
7088 SET_DECL_IMPLICIT_INSTANTIATION (decl);
7090 if (TREE_CODE (fns) == COMPONENT_REF)
7092 /* Due to bison parser ickiness, we will have already looked
7093 up an operator_name or PFUNCNAME within the current class
7094 (see template_id in parse.y). If the current class contains
7095 such a name, we'll get a COMPONENT_REF here. Undo that. */
7097 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
7098 == current_class_type);
7099 fns = TREE_OPERAND (fns, 1);
7101 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
7102 || TREE_CODE (fns) == OVERLOAD);
7103 DECL_TEMPLATE_INFO (decl) = build_template_info (fns, args);
7105 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
7106 if (TREE_PURPOSE (t)
7107 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
7109 error ("default arguments are not allowed in declaration "
7110 "of friend template specialization %qD",
7117 error ("%<inline%> is not allowed in declaration of friend "
7118 "template specialization %qD",
7125 /* If this decl has namespace scope, set that up. */
7127 set_decl_namespace (decl, in_namespace, friendp);
7129 DECL_CONTEXT (decl) = FROB_CONTEXT (current_decl_namespace ());
7131 /* `main' and builtins have implicit 'C' linkage. */
7132 if ((MAIN_NAME_P (declarator)
7133 || (IDENTIFIER_LENGTH (declarator) > 10
7134 && IDENTIFIER_POINTER (declarator)[0] == '_'
7135 && IDENTIFIER_POINTER (declarator)[1] == '_'
7136 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
7137 && current_lang_name == lang_name_cplusplus
7138 && ctype == NULL_TREE
7139 && DECL_FILE_SCOPE_P (decl))
7140 SET_DECL_LANGUAGE (decl, lang_c);
7142 /* Should probably propagate const out from type to decl I bet (mrs). */
7145 DECL_STATIC_FUNCTION_P (decl) = 1;
7146 DECL_CONTEXT (decl) = ctype;
7151 DECL_CONTEXT (decl) = ctype;
7153 check_class_member_definition_namespace (decl);
7156 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
7158 if (processing_template_decl)
7159 error ("cannot declare %<::main%> to be a template");
7161 error ("cannot declare %<::main%> to be inline");
7163 error ("cannot declare %<::main%> to be static");
7168 /* Members of anonymous types and local classes have no linkage; make
7169 them internal. If a typedef is made later, this will be changed. */
7170 if (ctype && (TYPE_ANONYMOUS_P (ctype)
7171 || decl_function_context (TYPE_MAIN_DECL (ctype))))
7174 if (publicp && cxx_dialect == cxx98)
7176 /* [basic.link]: A name with no linkage (notably, the name of a class
7177 or enumeration declared in a local scope) shall not be used to
7178 declare an entity with linkage.
7180 DR 757 relaxes this restriction for C++0x. */
7181 t = no_linkage_check (TREE_TYPE (decl),
7182 /*relaxed_p=*/false);
7185 if (TYPE_ANONYMOUS_P (t))
7187 if (DECL_EXTERN_C_P (decl))
7188 /* Allow this; it's pretty common in C. */;
7191 permerror (input_location, "anonymous type with no linkage "
7192 "used to declare function %q#D with linkage",
7194 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
7195 permerror (input_location, "%q+#D does not refer to the unqualified "
7196 "type, so it is not used for linkage",
7201 permerror (input_location, "type %qT with no linkage used to "
7202 "declare function %q#D with linkage", t, decl);
7206 TREE_PUBLIC (decl) = publicp;
7209 DECL_INTERFACE_KNOWN (decl) = 1;
7210 DECL_NOT_REALLY_EXTERN (decl) = 1;
7213 /* If the declaration was declared inline, mark it as such. */
7215 DECL_DECLARED_INLINE_P (decl) = 1;
7217 DECL_DECLARED_CONSTEXPR_P (decl) = true;
7219 DECL_EXTERNAL (decl) = 1;
7220 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
7223 ? G_("static member function %qD cannot have cv-qualifier")
7224 : G_("non-member function %qD cannot have cv-qualifier"),
7226 quals = TYPE_UNQUALIFIED;
7229 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
7230 && !grok_op_properties (decl, /*complain=*/true))
7234 /* Make the init_value nonzero so pushdecl knows this is not
7235 tentative. error_mark_node is replaced later with the BLOCK. */
7236 DECL_INITIAL (decl) = error_mark_node;
7238 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
7239 TREE_NOTHROW (decl) = 1;
7241 /* Caller will do the rest of this. */
7245 if (ctype != NULL_TREE)
7246 grokclassfn (ctype, decl, flags);
7248 decl = check_explicit_specialization (orig_declarator, decl,
7251 4 * (friendp != 0));
7252 if (decl == error_mark_node)
7255 if (DECL_STATIC_FUNCTION_P (decl))
7256 check_static_quals (decl, quals);
7260 cplus_decl_attributes (&decl, *attrlist, 0);
7261 *attrlist = NULL_TREE;
7264 /* Check main's type after attributes have been applied. */
7265 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
7267 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
7270 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
7272 error ("%<::main%> must return %<int%>");
7273 newtype = build_function_type (integer_type_node, oldtypeargs);
7274 TREE_TYPE (decl) = newtype;
7277 check_main_parameter_types (decl);
7280 if (ctype != NULL_TREE
7281 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
7284 tree old_decl = check_classfn (ctype, decl,
7285 (processing_template_decl
7286 > template_class_depth (ctype))
7287 ? current_template_parms
7290 if (old_decl == error_mark_node)
7298 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
7299 /* Because grokfndecl is always supposed to return a
7300 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7301 here. We depend on our callers to figure out that its
7302 really a template that's being returned. */
7303 old_decl = DECL_TEMPLATE_RESULT (old_decl);
7305 if (DECL_STATIC_FUNCTION_P (old_decl)
7306 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
7308 /* Remove the `this' parm added by grokclassfn. */
7309 revert_static_member_fn (decl);
7310 check_static_quals (decl, quals);
7312 if (DECL_ARTIFICIAL (old_decl))
7314 error ("definition of implicitly-declared %qD", old_decl);
7318 /* Since we've smashed OLD_DECL to its
7319 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7320 if (TREE_CODE (decl) == TEMPLATE_DECL)
7321 decl = DECL_TEMPLATE_RESULT (decl);
7323 /* Attempt to merge the declarations. This can fail, in
7324 the case of some invalid specialization declarations. */
7325 pushed_scope = push_scope (ctype);
7326 ok = duplicate_decls (decl, old_decl, friendp);
7328 pop_scope (pushed_scope);
7331 error ("no %q#D member function declared in class %qT",
7339 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
7342 if (ctype == NULL_TREE || check)
7346 DECL_VIRTUAL_P (decl) = 1;
7351 /* decl is a FUNCTION_DECL.
7352 specifiers are the parsed virt-specifiers.
7354 Set flags to reflect the virt-specifiers.
7359 set_virt_specifiers (tree decl, cp_virt_specifiers specifiers)
7361 if (decl == NULL_TREE)
7363 if (specifiers & VIRT_SPEC_OVERRIDE)
7364 DECL_OVERRIDE_P (decl) = 1;
7365 if (specifiers & VIRT_SPEC_FINAL)
7366 DECL_FINAL_P (decl) = 1;
7370 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7371 the linkage that DECL will receive in the object file. */
7374 set_linkage_for_static_data_member (tree decl)
7376 /* A static data member always has static storage duration and
7377 external linkage. Note that static data members are forbidden in
7378 local classes -- the only situation in which a class has
7379 non-external linkage. */
7380 TREE_PUBLIC (decl) = 1;
7381 TREE_STATIC (decl) = 1;
7382 /* For non-template classes, static data members are always put
7383 out in exactly those files where they are defined, just as
7384 with ordinary namespace-scope variables. */
7385 if (!processing_template_decl)
7386 DECL_INTERFACE_KNOWN (decl) = 1;
7389 /* Create a VAR_DECL named NAME with the indicated TYPE.
7391 If SCOPE is non-NULL, it is the class type or namespace containing
7392 the variable. If SCOPE is NULL, the variable should is created in
7393 the innermost enclosings scope. */
7396 grokvardecl (tree type,
7398 const cp_decl_specifier_seq *declspecs,
7404 tree explicit_scope;
7406 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
7408 /* Compute the scope in which to place the variable, but remember
7409 whether or not that scope was explicitly specified by the user. */
7410 explicit_scope = scope;
7413 /* An explicit "extern" specifier indicates a namespace-scope
7415 if (declspecs->storage_class == sc_extern)
7416 scope = current_decl_namespace ();
7417 else if (!at_function_scope_p ())
7418 scope = current_scope ();
7422 && (/* If the variable is a namespace-scope variable declared in a
7423 template, we need DECL_LANG_SPECIFIC. */
7424 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
7425 /* Similarly for namespace-scope variables with language linkage
7427 || (TREE_CODE (scope) == NAMESPACE_DECL
7428 && current_lang_name != lang_name_cplusplus)
7429 /* Similarly for static data members. */
7431 decl = build_lang_decl (VAR_DECL, name, type);
7433 decl = build_decl (input_location, VAR_DECL, name, type);
7435 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
7436 set_decl_namespace (decl, explicit_scope, 0);
7438 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
7440 if (declspecs->storage_class == sc_extern)
7442 DECL_THIS_EXTERN (decl) = 1;
7443 DECL_EXTERNAL (decl) = !initialized;
7446 if (DECL_CLASS_SCOPE_P (decl))
7448 set_linkage_for_static_data_member (decl);
7449 /* This function is only called with out-of-class definitions. */
7450 DECL_EXTERNAL (decl) = 0;
7451 check_class_member_definition_namespace (decl);
7453 /* At top level, either `static' or no s.c. makes a definition
7454 (perhaps tentative), and absence of `static' makes it public. */
7455 else if (toplevel_bindings_p ())
7457 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
7458 && (DECL_THIS_EXTERN (decl) || ! constp));
7459 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
7461 /* Not at top level, only `static' makes a static definition. */
7464 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
7465 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
7468 if (declspecs->specs[(int)ds_thread])
7469 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
7471 /* If the type of the decl has no linkage, make sure that we'll
7472 notice that in mark_used. */
7473 if (cxx_dialect > cxx98
7474 && decl_linkage (decl) != lk_none
7475 && DECL_LANG_SPECIFIC (decl) == NULL
7476 && !DECL_EXTERN_C_P (decl)
7477 && no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false))
7478 retrofit_lang_decl (decl);
7480 if (TREE_PUBLIC (decl))
7482 /* [basic.link]: A name with no linkage (notably, the name of a class
7483 or enumeration declared in a local scope) shall not be used to
7484 declare an entity with linkage.
7486 DR 757 relaxes this restriction for C++0x. */
7487 tree t = (cxx_dialect > cxx98 ? NULL_TREE
7488 : no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false));
7491 if (TYPE_ANONYMOUS_P (t))
7493 if (DECL_EXTERN_C_P (decl))
7494 /* Allow this; it's pretty common in C. */
7498 /* DRs 132, 319 and 389 seem to indicate types with
7499 no linkage can only be used to declare extern "C"
7500 entities. Since it's not always an error in the
7501 ISO C++ 90 Standard, we only issue a warning. */
7502 warning (0, "anonymous type with no linkage used to declare "
7503 "variable %q#D with linkage", decl);
7504 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
7505 warning (0, "%q+#D does not refer to the unqualified "
7506 "type, so it is not used for linkage",
7511 warning (0, "type %qT with no linkage used to declare variable "
7512 "%q#D with linkage", t, decl);
7516 DECL_INTERFACE_KNOWN (decl) = 1;
7521 /* Create and return a canonical pointer to member function type, for
7522 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7525 build_ptrmemfunc_type (tree type)
7529 tree unqualified_variant = NULL_TREE;
7531 if (type == error_mark_node)
7534 /* If a canonical type already exists for this type, use it. We use
7535 this method instead of type_hash_canon, because it only does a
7536 simple equality check on the list of field members. */
7538 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
7541 /* Make sure that we always have the unqualified pointer-to-member
7543 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7545 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
7547 t = make_class_type (RECORD_TYPE);
7548 xref_basetypes (t, NULL_TREE);
7550 /* Let the front end know this is a pointer to member function... */
7551 TYPE_PTRMEMFUNC_FLAG (t) = 1;
7552 /* ... and not really a class type. */
7553 SET_CLASS_TYPE_P (t, 0);
7555 field = build_decl (input_location, FIELD_DECL, pfn_identifier, type);
7558 field = build_decl (input_location, FIELD_DECL, delta_identifier,
7560 DECL_CHAIN (field) = fields;
7563 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
7565 /* Zap out the name so that the back end will give us the debugging
7566 information for this anonymous RECORD_TYPE. */
7567 TYPE_NAME (t) = NULL_TREE;
7569 /* If this is not the unqualified form of this pointer-to-member
7570 type, set the TYPE_MAIN_VARIANT for this type to be the
7571 unqualified type. Since they are actually RECORD_TYPEs that are
7572 not variants of each other, we must do this manually.
7573 As we just built a new type there is no need to do yet another copy. */
7574 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7576 int type_quals = cp_type_quals (type);
7577 TYPE_READONLY (t) = (type_quals & TYPE_QUAL_CONST) != 0;
7578 TYPE_VOLATILE (t) = (type_quals & TYPE_QUAL_VOLATILE) != 0;
7579 TYPE_RESTRICT (t) = (type_quals & TYPE_QUAL_RESTRICT) != 0;
7580 TYPE_MAIN_VARIANT (t) = unqualified_variant;
7581 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
7582 TYPE_NEXT_VARIANT (unqualified_variant) = t;
7583 TREE_TYPE (TYPE_BINFO (t)) = t;
7586 /* Cache this pointer-to-member type so that we can find it again
7588 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
7590 if (TYPE_STRUCTURAL_EQUALITY_P (type))
7591 SET_TYPE_STRUCTURAL_EQUALITY (t);
7592 else if (TYPE_CANONICAL (type) != type)
7593 TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
7598 /* Create and return a pointer to data member type. */
7601 build_ptrmem_type (tree class_type, tree member_type)
7603 if (TREE_CODE (member_type) == METHOD_TYPE)
7605 cp_cv_quals quals = type_memfn_quals (member_type);
7606 member_type = build_memfn_type (member_type, class_type, quals);
7607 return build_ptrmemfunc_type (build_pointer_type (member_type));
7611 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
7612 return build_offset_type (class_type, member_type);
7616 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7617 Check to see that the definition is valid. Issue appropriate error
7618 messages. Return 1 if the definition is particularly bad, or 0
7622 check_static_variable_definition (tree decl, tree type)
7624 /* If DECL is declared constexpr, we'll do the appropriate checks
7625 in check_initializer. */
7626 if (DECL_P (decl) && DECL_DECLARED_CONSTEXPR_P (decl))
7628 else if (cxx_dialect >= cxx0x && !INTEGRAL_OR_ENUMERATION_TYPE_P (type))
7630 if (literal_type_p (type))
7631 error ("%<constexpr%> needed for in-class initialization of static "
7632 "data member %q#D of non-integral type", decl);
7634 error ("in-class initialization of static data member %q#D of "
7635 "non-literal type", decl);
7639 /* Motion 10 at San Diego: If a static const integral data member is
7640 initialized with an integral constant expression, the initializer
7641 may appear either in the declaration (within the class), or in
7642 the definition, but not both. If it appears in the class, the
7643 member is a member constant. The file-scope definition is always
7645 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
7647 error ("invalid in-class initialization of static data member "
7648 "of non-integral type %qT",
7652 else if (!CP_TYPE_CONST_P (type))
7653 error ("ISO C++ forbids in-class initialization of non-const "
7654 "static member %qD",
7656 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type))
7657 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids initialization of member constant "
7658 "%qD of non-integral type %qT", decl, type);
7663 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
7664 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
7665 expressions out into temporary variables so that walk_tree doesn't
7666 step into them (c++/15764). */
7669 stabilize_save_expr_r (tree *expr_p, int *walk_subtrees, void *data)
7671 struct pointer_set_t *pset = (struct pointer_set_t *)data;
7672 tree expr = *expr_p;
7673 if (TREE_CODE (expr) == SAVE_EXPR)
7675 tree op = TREE_OPERAND (expr, 0);
7676 cp_walk_tree (&op, stabilize_save_expr_r, data, pset);
7677 if (TREE_SIDE_EFFECTS (op))
7678 TREE_OPERAND (expr, 0) = get_temp_regvar (TREE_TYPE (op), op);
7681 else if (!EXPR_P (expr) || !TREE_SIDE_EFFECTS (expr))
7686 /* Entry point for the above. */
7689 stabilize_vla_size (tree size)
7691 struct pointer_set_t *pset = pointer_set_create ();
7692 /* Break out any function calls into temporary variables. */
7693 cp_walk_tree (&size, stabilize_save_expr_r, pset, pset);
7696 /* Given the SIZE (i.e., number of elements) in an array, compute an
7697 appropriate index type for the array. If non-NULL, NAME is the
7698 name of the thing being declared. */
7701 compute_array_index_type (tree name, tree size, tsubst_flags_t complain)
7706 tree abi_1_itype = NULL_TREE;
7708 if (error_operand_p (size))
7709 return error_mark_node;
7711 type = TREE_TYPE (size);
7712 /* type_dependent_expression_p? */
7713 if (!dependent_type_p (type))
7715 mark_rvalue_use (size);
7717 if (cxx_dialect < cxx0x && TREE_CODE (size) == NOP_EXPR
7718 && TREE_SIDE_EFFECTS (size))
7719 /* In C++98, we mark a non-constant array bound with a magic
7720 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
7723 size = fold_non_dependent_expr (size);
7725 if (CLASS_TYPE_P (type)
7726 && CLASSTYPE_LITERAL_P (type))
7728 size = build_expr_type_conversion (WANT_INT, size, true);
7731 if (!(complain & tf_error))
7732 return error_mark_node;
7734 error ("size of array %qD has non-integral type %qT",
7737 error ("size of array has non-integral type %qT", type);
7738 size = integer_one_node;
7740 if (size == error_mark_node)
7741 return error_mark_node;
7742 type = TREE_TYPE (size);
7743 /* We didn't support this case in GCC 3.2, so don't bother
7744 trying to model it now in ABI v1. */
7745 abi_1_itype = error_mark_node;
7748 size = maybe_constant_value (size);
7749 if (!TREE_CONSTANT (size))
7753 if (error_operand_p (size))
7754 return error_mark_node;
7756 /* The array bound must be an integer type. */
7757 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type))
7759 if (!(complain & tf_error))
7760 return error_mark_node;
7762 error ("size of array %qD has non-integral type %qT", name, type);
7764 error ("size of array has non-integral type %qT", type);
7765 size = integer_one_node;
7766 type = TREE_TYPE (size);
7770 /* A type is dependent if it is...an array type constructed from any
7771 dependent type or whose size is specified by a constant expression
7772 that is value-dependent. */
7773 /* We can only call value_dependent_expression_p on integral constant
7774 expressions; treat non-constant expressions as dependent, too. */
7775 if (processing_template_decl
7776 && (dependent_type_p (type)
7777 || !TREE_CONSTANT (size) || value_dependent_expression_p (size)))
7779 /* We cannot do any checking for a SIZE that isn't known to be
7780 constant. Just build the index type and mark that it requires
7781 structural equality checks. */
7782 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7783 size, integer_one_node));
7784 TYPE_DEPENDENT_P (itype) = 1;
7785 TYPE_DEPENDENT_P_VALID (itype) = 1;
7786 SET_TYPE_STRUCTURAL_EQUALITY (itype);
7790 if (!abi_version_at_least (2) && processing_template_decl
7791 && abi_1_itype == NULL_TREE)
7792 /* For abi-1, we handled all instances in templates the same way,
7793 even when they were non-dependent. This affects the manglings
7794 produced. So, we do the normal checking for non-dependent
7795 sizes, but at the end we'll return the same type that abi-1
7796 would have, but with TYPE_CANONICAL set to the "right"
7797 value that the current ABI would provide. */
7798 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7799 osize, integer_one_node));
7801 /* Normally, the array-bound will be a constant. */
7802 if (TREE_CODE (size) == INTEGER_CST)
7804 /* Check to see if the array bound overflowed. Make that an
7805 error, no matter how generous we're being. */
7806 constant_expression_error (size);
7808 /* An array must have a positive number of elements. */
7809 if (INT_CST_LT (size, integer_zero_node))
7811 if (!(complain & tf_error))
7812 return error_mark_node;
7814 error ("size of array %qD is negative", name);
7816 error ("size of array is negative");
7817 size = integer_one_node;
7819 /* As an extension we allow zero-sized arrays. */
7820 else if (integer_zerop (size))
7822 if (!(complain & tf_error))
7823 /* We must fail if performing argument deduction (as
7824 indicated by the state of complain), so that
7825 another substitution can be found. */
7826 return error_mark_node;
7827 else if (in_system_header)
7828 /* Allow them in system headers because glibc uses them. */;
7830 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array %qD", name);
7832 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array");
7835 else if (TREE_CONSTANT (size)
7836 /* We don't allow VLAs at non-function scopes, or during
7837 tentative template substitution. */
7838 || !at_function_scope_p () || !(complain & tf_error))
7840 if (!(complain & tf_error))
7841 return error_mark_node;
7842 /* `(int) &fn' is not a valid array bound. */
7844 error ("size of array %qD is not an integral constant-expression",
7847 error ("size of array is not an integral constant-expression");
7848 size = integer_one_node;
7850 else if (pedantic && warn_vla != 0)
7853 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array %qD", name);
7855 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array");
7857 else if (warn_vla > 0)
7861 "variable length array %qD is used", name);
7864 "variable length array is used");
7867 if (processing_template_decl && !TREE_CONSTANT (size))
7868 /* A variable sized array. */
7869 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
7872 HOST_WIDE_INT saved_processing_template_decl;
7874 /* Compute the index of the largest element in the array. It is
7875 one less than the number of elements in the array. We save
7876 and restore PROCESSING_TEMPLATE_DECL so that computations in
7877 cp_build_binary_op will be appropriately folded. */
7878 saved_processing_template_decl = processing_template_decl;
7879 processing_template_decl = 0;
7880 itype = cp_build_binary_op (input_location,
7882 cp_convert (ssizetype, size),
7883 cp_convert (ssizetype, integer_one_node),
7884 tf_warning_or_error);
7885 itype = fold (itype);
7886 processing_template_decl = saved_processing_template_decl;
7888 if (!TREE_CONSTANT (itype))
7889 /* A variable sized array. */
7890 itype = variable_size (itype);
7891 /* Make sure that there was no overflow when creating to a signed
7892 index type. (For example, on a 32-bit machine, an array with
7893 size 2^32 - 1 is too big.) */
7894 else if (TREE_CODE (itype) == INTEGER_CST
7895 && TREE_OVERFLOW (itype))
7897 if (!(complain & tf_error))
7898 return error_mark_node;
7899 error ("overflow in array dimension");
7900 TREE_OVERFLOW (itype) = 0;
7904 /* Create and return the appropriate index type. */
7905 if (abi_1_itype && abi_1_itype != error_mark_node)
7907 tree t = build_index_type (itype);
7908 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
7909 itype = abi_1_itype;
7912 itype = build_index_type (itype);
7914 /* If the index type were dependent, we would have returned early, so
7915 remember that it isn't. */
7916 TYPE_DEPENDENT_P (itype) = 0;
7917 TYPE_DEPENDENT_P_VALID (itype) = 1;
7921 /* Returns the scope (if any) in which the entity declared by
7922 DECLARATOR will be located. If the entity was declared with an
7923 unqualified name, NULL_TREE is returned. */
7926 get_scope_of_declarator (const cp_declarator *declarator)
7928 while (declarator && declarator->kind != cdk_id)
7929 declarator = declarator->declarator;
7931 /* If the declarator-id is a SCOPE_REF, the scope in which the
7932 declaration occurs is the first operand. */
7934 && declarator->u.id.qualifying_scope)
7935 return declarator->u.id.qualifying_scope;
7937 /* Otherwise, the declarator is not a qualified name; the entity will
7938 be declared in the current scope. */
7942 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
7943 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
7947 create_array_type_for_decl (tree name, tree type, tree size)
7949 tree itype = NULL_TREE;
7951 /* If things have already gone awry, bail now. */
7952 if (type == error_mark_node || size == error_mark_node)
7953 return error_mark_node;
7955 /* If there are some types which cannot be array elements,
7956 issue an error-message and return. */
7957 switch (TREE_CODE (type))
7961 error ("declaration of %qD as array of void", name);
7963 error ("creating array of void");
7964 return error_mark_node;
7968 error ("declaration of %qD as array of functions", name);
7970 error ("creating array of functions");
7971 return error_mark_node;
7973 case REFERENCE_TYPE:
7975 error ("declaration of %qD as array of references", name);
7977 error ("creating array of references");
7978 return error_mark_node;
7982 error ("declaration of %qD as array of function members", name);
7984 error ("creating array of function members");
7985 return error_mark_node;
7993 The constant expressions that specify the bounds of the arrays
7994 can be omitted only for the first member of the sequence. */
7995 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
7998 error ("declaration of %qD as multidimensional array must "
7999 "have bounds for all dimensions except the first",
8002 error ("multidimensional array must have bounds for all "
8003 "dimensions except the first");
8005 return error_mark_node;
8008 /* Figure out the index type for the array. */
8010 itype = compute_array_index_type (name, size, tf_warning_or_error);
8013 T is called the array element type; this type shall not be [...] an
8014 abstract class type. */
8015 abstract_virtuals_error (name, type);
8017 return build_cplus_array_type (type, itype);
8020 /* Check that it's OK to declare a function with the indicated TYPE.
8021 SFK indicates the kind of special function (if any) that this
8022 function is. OPTYPE is the type given in a conversion operator
8023 declaration, or the class type for a constructor/destructor.
8024 Returns the actual return type of the function; that
8025 may be different than TYPE if an error occurs, or for certain
8026 special functions. */
8029 check_special_function_return_type (special_function_kind sfk,
8035 case sfk_constructor:
8037 error ("return type specification for constructor invalid");
8039 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
8040 type = build_pointer_type (optype);
8042 type = void_type_node;
8045 case sfk_destructor:
8047 error ("return type specification for destructor invalid");
8048 /* We can't use the proper return type here because we run into
8049 problems with ambiguous bases and covariant returns.
8050 Java classes are left unchanged because (void *) isn't a valid
8051 Java type, and we don't want to change the Java ABI. */
8052 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
8053 type = build_pointer_type (void_type_node);
8055 type = void_type_node;
8058 case sfk_conversion:
8060 error ("return type specified for %<operator %T%>", optype);
8071 /* A variable or data member (whose unqualified name is IDENTIFIER)
8072 has been declared with the indicated TYPE. If the TYPE is not
8073 acceptable, issue an error message and return a type to use for
8074 error-recovery purposes. */
8077 check_var_type (tree identifier, tree type)
8079 if (VOID_TYPE_P (type))
8082 error ("unnamed variable or field declared void");
8083 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
8085 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
8086 error ("variable or field %qE declared void", identifier);
8089 error ("variable or field declared void");
8090 type = error_mark_node;
8096 /* Given declspecs and a declarator (abstract or otherwise), determine
8097 the name and type of the object declared and construct a DECL node
8100 DECLSPECS points to the representation of declaration-specifier
8101 sequence that precedes declarator.
8103 DECL_CONTEXT says which syntactic context this declaration is in:
8104 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8105 FUNCDEF for a function definition. Like NORMAL but a few different
8106 error messages in each case. Return value may be zero meaning
8107 this definition is too screwy to try to parse.
8108 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8109 handle member functions (which have FIELD context).
8110 Return value may be zero meaning this definition is too screwy to
8112 PARM for a parameter declaration (either within a function prototype
8113 or before a function body). Make a PARM_DECL, or return void_type_node.
8114 TPARM for a template parameter declaration.
8115 CATCHPARM for a parameter declaration before a catch clause.
8116 TYPENAME if for a typename (in a cast or sizeof).
8117 Don't make a DECL node; just return the ..._TYPE node.
8118 FIELD for a struct or union field; make a FIELD_DECL.
8119 BITFIELD for a field with specified width.
8121 INITIALIZED is as for start_decl.
8123 ATTRLIST is a pointer to the list of attributes, which may be NULL
8124 if there are none; *ATTRLIST may be modified if attributes from inside
8125 the declarator should be applied to the declaration.
8127 When this function is called, scoping variables (such as
8128 CURRENT_CLASS_TYPE) should reflect the scope in which the
8129 declaration occurs, not the scope in which the new declaration will
8130 be placed. For example, on:
8134 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8137 Returns a DECL (if a declarator is present), a TYPE (if there is no
8138 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8142 grokdeclarator (const cp_declarator *declarator,
8143 const cp_decl_specifier_seq *declspecs,
8144 enum decl_context decl_context,
8148 tree type = NULL_TREE;
8150 int explicit_int128 = 0;
8151 int virtualp, explicitp, friendp, inlinep, staticp;
8152 int explicit_int = 0;
8153 int explicit_char = 0;
8154 int defaulted_int = 0;
8155 tree dependent_name = NULL_TREE;
8157 tree typedef_decl = NULL_TREE;
8158 const char *name = NULL;
8159 tree typedef_type = NULL_TREE;
8160 /* True if this declarator is a function definition. */
8161 bool funcdef_flag = false;
8162 cp_declarator_kind innermost_code = cdk_error;
8165 /* See the code below that used this. */
8166 tree decl_attr = NULL_TREE;
8169 /* Keep track of what sort of function is being processed
8170 so that we can warn about default return values, or explicit
8171 return values which do not match prescribed defaults. */
8172 special_function_kind sfk = sfk_none;
8174 tree dname = NULL_TREE;
8175 tree ctor_return_type = NULL_TREE;
8176 enum overload_flags flags = NO_SPECIAL;
8177 /* cv-qualifiers that apply to the declarator, for a declaration of
8178 a member function. */
8179 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
8180 /* virt-specifiers that apply to the declarator, for a declaration of
8181 a member function. */
8182 cp_virt_specifiers virt_specifiers = VIRT_SPEC_UNSPECIFIED;
8183 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8185 tree raises = NULL_TREE;
8186 int template_count = 0;
8187 tree returned_attrs = NULL_TREE;
8188 tree parms = NULL_TREE;
8189 const cp_declarator *id_declarator;
8190 /* The unqualified name of the declarator; either an
8191 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8192 tree unqualified_id;
8193 /* The class type, if any, in which this entity is located,
8194 or NULL_TREE if none. Note that this value may be different from
8195 the current class type; for example if an attempt is made to declare
8196 "A::f" inside "B", this value will be "A". */
8197 tree ctype = current_class_type;
8198 /* The NAMESPACE_DECL for the namespace in which this entity is
8199 located. If an unqualified name is used to declare the entity,
8200 this value will be NULL_TREE, even if the entity is located at
8202 tree in_namespace = NULL_TREE;
8203 cp_storage_class storage_class;
8204 bool unsigned_p, signed_p, short_p, long_p, thread_p;
8205 bool type_was_error_mark_node = false;
8206 bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
8207 bool template_type_arg = false;
8208 bool template_parm_flag = false;
8209 bool constexpr_p = declspecs->specs[(int) ds_constexpr];
8212 signed_p = declspecs->specs[(int)ds_signed];
8213 unsigned_p = declspecs->specs[(int)ds_unsigned];
8214 short_p = declspecs->specs[(int)ds_short];
8215 long_p = declspecs->specs[(int)ds_long];
8216 longlong = declspecs->specs[(int)ds_long] >= 2;
8217 explicit_int128 = declspecs->explicit_int128_p;
8218 thread_p = declspecs->specs[(int)ds_thread];
8220 if (decl_context == FUNCDEF)
8221 funcdef_flag = true, decl_context = NORMAL;
8222 else if (decl_context == MEMFUNCDEF)
8223 funcdef_flag = true, decl_context = FIELD;
8224 else if (decl_context == BITFIELD)
8225 bitfield = 1, decl_context = FIELD;
8226 else if (decl_context == TEMPLATE_TYPE_ARG)
8227 template_type_arg = true, decl_context = TYPENAME;
8228 else if (decl_context == TPARM)
8229 template_parm_flag = true, decl_context = PARM;
8231 if (initialized > 1)
8232 funcdef_flag = true;
8234 /* Look inside a declarator for the name being declared
8235 and get it as a string, for an error message. */
8236 for (id_declarator = declarator;
8238 id_declarator = id_declarator->declarator)
8240 if (id_declarator->kind != cdk_id)
8241 innermost_code = id_declarator->kind;
8243 switch (id_declarator->kind)
8246 if (id_declarator->declarator
8247 && id_declarator->declarator->kind == cdk_id)
8249 sfk = id_declarator->declarator->u.id.sfk;
8250 if (sfk == sfk_destructor)
8257 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
8258 tree decl = id_declarator->u.id.unqualified_name;
8261 if (qualifying_scope)
8263 if (at_function_scope_p ())
8267 A declarator-id shall not be qualified except
8270 None of the cases are permitted in block
8272 if (qualifying_scope == global_namespace)
8273 error ("invalid use of qualified-name %<::%D%>",
8275 else if (TYPE_P (qualifying_scope))
8276 error ("invalid use of qualified-name %<%T::%D%>",
8277 qualifying_scope, decl);
8279 error ("invalid use of qualified-name %<%D::%D%>",
8280 qualifying_scope, decl);
8281 return error_mark_node;
8283 else if (TYPE_P (qualifying_scope))
8285 ctype = qualifying_scope;
8286 if (innermost_code != cdk_function
8287 && current_class_type
8288 && !UNIQUELY_DERIVED_FROM_P (ctype,
8289 current_class_type))
8291 error ("type %qT is not derived from type %qT",
8292 ctype, current_class_type);
8293 return error_mark_node;
8296 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
8297 in_namespace = qualifying_scope;
8299 switch (TREE_CODE (decl))
8305 if (innermost_code != cdk_function)
8307 error ("declaration of %qD as non-function", decl);
8308 return error_mark_node;
8310 else if (!qualifying_scope
8311 && !(current_class_type && at_class_scope_p ()))
8313 error ("declaration of %qD as non-member", decl);
8314 return error_mark_node;
8317 type = TREE_OPERAND (decl, 0);
8319 type = constructor_name (type);
8320 name = identifier_to_locale (IDENTIFIER_POINTER (type));
8325 case TEMPLATE_ID_EXPR:
8327 tree fns = TREE_OPERAND (decl, 0);
8330 if (TREE_CODE (dname) != IDENTIFIER_NODE)
8332 gcc_assert (is_overloaded_fn (dname));
8333 dname = DECL_NAME (get_first_fn (dname));
8338 case IDENTIFIER_NODE:
8339 if (TREE_CODE (decl) == IDENTIFIER_NODE)
8342 if (C_IS_RESERVED_WORD (dname))
8344 error ("declarator-id missing; using reserved word %qD",
8346 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
8348 else if (!IDENTIFIER_TYPENAME_P (dname))
8349 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
8352 gcc_assert (flags == NO_SPECIAL);
8353 flags = TYPENAME_FLAG;
8354 ctor_return_type = TREE_TYPE (dname);
8355 sfk = sfk_conversion;
8356 if (is_typename_at_global_scope (dname))
8357 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
8359 name = "<invalid operator>";
8376 return error_mark_node;
8381 if (id_declarator->kind == cdk_id)
8387 The declarator in a function-definition shall have the form
8388 D1 ( parameter-declaration-clause) ... */
8389 if (funcdef_flag && innermost_code != cdk_function)
8391 error ("function definition does not declare parameters");
8392 return error_mark_node;
8395 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
8396 && innermost_code != cdk_function
8397 && ! (ctype && !declspecs->any_specifiers_p))
8399 error ("declaration of %qD as non-function", dname);
8400 return error_mark_node;
8403 /* Anything declared one level down from the top level
8404 must be one of the parameters of a function
8405 (because the body is at least two levels down). */
8407 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
8408 by not allowing C++ class definitions to specify their parameters
8409 with xdecls (must be spec.d in the parmlist).
8411 Since we now wait to push a class scope until we are sure that
8412 we are in a legitimate method context, we must set oldcname
8413 explicitly (since current_class_name is not yet alive).
8415 We also want to avoid calling this a PARM if it is in a namespace. */
8417 if (decl_context == NORMAL && !toplevel_bindings_p ())
8419 struct cp_binding_level *b = current_binding_level;
8420 current_binding_level = b->level_chain;
8421 if (current_binding_level != 0 && toplevel_bindings_p ())
8422 decl_context = PARM;
8423 current_binding_level = b;
8427 name = decl_context == PARM ? "parameter" : "type name";
8429 if (constexpr_p && declspecs->specs[(int)ds_typedef])
8431 error ("%<constexpr%> cannot appear in a typedef declaration");
8432 return error_mark_node;
8435 /* If there were multiple types specified in the decl-specifier-seq,
8436 issue an error message. */
8437 if (declspecs->multiple_types_p)
8439 error ("two or more data types in declaration of %qs", name);
8440 return error_mark_node;
8443 if (declspecs->conflicting_specifiers_p)
8445 error ("conflicting specifiers in declaration of %qs", name);
8446 return error_mark_node;
8449 /* Extract the basic type from the decl-specifier-seq. */
8450 type = declspecs->type;
8451 if (type == error_mark_node)
8454 type_was_error_mark_node = true;
8456 /* If the entire declaration is itself tagged as deprecated then
8457 suppress reports of deprecated items. */
8458 if (type && TREE_DEPRECATED (type)
8459 && deprecated_state != DEPRECATED_SUPPRESS)
8460 warn_deprecated_use (type, NULL_TREE);
8461 if (type && TREE_CODE (type) == TYPE_DECL)
8463 typedef_decl = type;
8464 type = TREE_TYPE (typedef_decl);
8465 if (TREE_DEPRECATED (type)
8466 && DECL_ARTIFICIAL (typedef_decl)
8467 && deprecated_state != DEPRECATED_SUPPRESS)
8468 warn_deprecated_use (type, NULL_TREE);
8470 /* No type at all: default to `int', and set DEFAULTED_INT
8471 because it was not a user-defined typedef. */
8472 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
8474 /* These imply 'int'. */
8475 type = integer_type_node;
8479 explicit_int = declspecs->explicit_int_p;
8480 explicit_char = declspecs->explicit_char_p;
8483 /* See the code below that used this. */
8485 decl_attr = DECL_ATTRIBUTES (typedef_decl);
8487 typedef_type = type;
8490 if (sfk != sfk_conversion)
8491 ctor_return_type = ctype;
8493 if (sfk != sfk_none)
8494 type = check_special_function_return_type (sfk, type,
8496 else if (type == NULL_TREE)
8502 /* We handle `main' specially here, because 'main () { }' is so
8503 common. With no options, it is allowed. With -Wreturn-type,
8504 it is a warning. It is only an error with -pedantic-errors. */
8505 is_main = (funcdef_flag
8506 && dname && TREE_CODE (dname) == IDENTIFIER_NODE
8507 && MAIN_NAME_P (dname)
8508 && ctype == NULL_TREE
8509 && in_namespace == NULL_TREE
8510 && current_namespace == global_namespace);
8512 if (type_was_error_mark_node)
8513 /* We've already issued an error, don't complain more. */;
8514 else if (in_system_header || flag_ms_extensions)
8515 /* Allow it, sigh. */;
8517 permerror (input_location, "ISO C++ forbids declaration of %qs with no type", name);
8519 pedwarn (input_location, OPT_pedantic,
8520 "ISO C++ forbids declaration of %qs with no type", name);
8522 warning (OPT_Wreturn_type,
8523 "ISO C++ forbids declaration of %qs with no type", name);
8525 type = integer_type_node;
8530 /* Now process the modifiers that were specified
8531 and check for invalid combinations. */
8533 /* Long double is a special combination. */
8534 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
8537 type = cp_build_qualified_type (long_double_type_node,
8538 cp_type_quals (type));
8541 /* Check all other uses of type modifiers. */
8543 if (unsigned_p || signed_p || long_p || short_p)
8547 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
8548 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
8549 else if (signed_p && unsigned_p)
8550 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
8551 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
8552 error ("%<long long%> invalid for %qs", name);
8553 else if (explicit_int128 && TREE_CODE (type) != INTEGER_TYPE)
8554 error ("%<__int128%> invalid for %qs", name);
8555 else if (long_p && TREE_CODE (type) == REAL_TYPE)
8556 error ("%<long%> invalid for %qs", name);
8557 else if (short_p && TREE_CODE (type) == REAL_TYPE)
8558 error ("%<short%> invalid for %qs", name);
8559 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
8560 error ("%<long%> or %<short%> invalid for %qs", name);
8561 else if ((long_p || short_p || explicit_char || explicit_int) && explicit_int128)
8562 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name);
8563 else if ((long_p || short_p) && explicit_char)
8564 error ("%<long%> or %<short%> specified with char for %qs", name);
8565 else if (long_p && short_p)
8566 error ("%<long%> and %<short%> specified together for %qs", name);
8567 else if (type == char16_type_node || type == char32_type_node)
8569 if (signed_p || unsigned_p)
8570 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
8571 else if (short_p || long_p)
8572 error ("%<short%> or %<long%> invalid for %qs", name);
8577 if (!explicit_int && !defaulted_int && !explicit_char && !explicit_int128 && pedantic)
8579 pedwarn (input_location, OPT_pedantic,
8580 "long, short, signed or unsigned used invalidly for %qs",
8582 if (flag_pedantic_errors)
8585 if (explicit_int128)
8587 if (int128_integer_type_node == NULL_TREE)
8589 error ("%<__int128%> is not supported by this target");
8594 pedwarn (input_location, OPT_pedantic,
8595 "ISO C++ does not support %<__int128%> for %qs",
8597 if (flag_pedantic_errors)
8603 /* Discard the type modifiers if they are invalid. */
8611 explicit_int128 = false;
8615 /* Decide whether an integer type is signed or not.
8616 Optionally treat bitfields as signed by default. */
8620 It is implementation-defined whether a plain (neither
8621 explicitly signed or unsigned) char, short, int, or long
8622 bit-field is signed or unsigned.
8624 Naturally, we extend this to long long as well. Note that
8625 this does not include wchar_t. */
8626 || (bitfield && !flag_signed_bitfields
8628 /* A typedef for plain `int' without `signed' can be
8629 controlled just like plain `int', but a typedef for
8630 `signed int' cannot be so controlled. */
8632 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
8633 && TREE_CODE (type) == INTEGER_TYPE
8634 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
8636 if (explicit_int128)
8637 type = int128_unsigned_type_node;
8639 type = long_long_unsigned_type_node;
8641 type = long_unsigned_type_node;
8643 type = short_unsigned_type_node;
8644 else if (type == char_type_node)
8645 type = unsigned_char_type_node;
8646 else if (typedef_decl)
8647 type = unsigned_type_for (type);
8649 type = unsigned_type_node;
8651 else if (signed_p && type == char_type_node)
8652 type = signed_char_type_node;
8653 else if (explicit_int128)
8654 type = int128_integer_type_node;
8656 type = long_long_integer_type_node;
8658 type = long_integer_type_node;
8660 type = short_integer_type_node;
8662 if (declspecs->specs[(int)ds_complex])
8664 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
8665 error ("complex invalid for %qs", name);
8666 /* If we just have "complex", it is equivalent to
8667 "complex double", but if any modifiers at all are specified it is
8668 the complex form of TYPE. E.g, "complex short" is
8669 "complex short int". */
8670 else if (defaulted_int && ! longlong && ! explicit_int128
8671 && ! (long_p || short_p || signed_p || unsigned_p))
8672 type = complex_double_type_node;
8673 else if (type == integer_type_node)
8674 type = complex_integer_type_node;
8675 else if (type == float_type_node)
8676 type = complex_float_type_node;
8677 else if (type == double_type_node)
8678 type = complex_double_type_node;
8679 else if (type == long_double_type_node)
8680 type = complex_long_double_type_node;
8682 type = build_complex_type (type);
8685 type_quals = TYPE_UNQUALIFIED;
8686 if (declspecs->specs[(int)ds_const])
8687 type_quals |= TYPE_QUAL_CONST;
8688 if (declspecs->specs[(int)ds_volatile])
8689 type_quals |= TYPE_QUAL_VOLATILE;
8690 if (declspecs->specs[(int)ds_restrict])
8691 type_quals |= TYPE_QUAL_RESTRICT;
8692 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
8693 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8696 type_quals |= cp_type_quals (type);
8697 type = cp_build_qualified_type_real
8698 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
8699 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
8700 /* We might have ignored or rejected some of the qualifiers. */
8701 type_quals = cp_type_quals (type);
8704 inlinep = !! declspecs->specs[(int)ds_inline];
8705 virtualp = !! declspecs->specs[(int)ds_virtual];
8706 explicitp = !! declspecs->specs[(int)ds_explicit];
8708 storage_class = declspecs->storage_class;
8709 if (storage_class == sc_static)
8710 staticp = 1 + (decl_context == FIELD);
8712 if (virtualp && staticp == 2)
8714 error ("member %qD cannot be declared both virtual and static", dname);
8715 storage_class = sc_none;
8718 friendp = !! declspecs->specs[(int)ds_friend];
8720 if (dependent_name && !friendp)
8722 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
8723 return error_mark_node;
8726 /* Issue errors about use of storage classes for parameters. */
8727 if (decl_context == PARM)
8729 if (declspecs->specs[(int)ds_typedef])
8731 error ("typedef declaration invalid in parameter declaration");
8732 return error_mark_node;
8734 else if (template_parm_flag && storage_class != sc_none)
8736 error ("storage class specified for template parameter %qs", name);
8737 return error_mark_node;
8739 else if (storage_class == sc_static
8740 || storage_class == sc_extern
8742 error ("storage class specifiers invalid in parameter declarations");
8744 /* Function parameters cannot be constexpr. If we saw one, moan
8745 and pretend it wasn't there. */
8748 error ("a parameter cannot be declared %<constexpr%>");
8753 /* Give error if `virtual' is used outside of class declaration. */
8755 && (current_class_name == NULL_TREE || decl_context != FIELD))
8757 error ("%<virtual%> outside class declaration");
8761 /* Static anonymous unions are dealt with here. */
8762 if (staticp && decl_context == TYPENAME
8764 && ANON_AGGR_TYPE_P (declspecs->type))
8765 decl_context = FIELD;
8767 /* Warn about storage classes that are invalid for certain
8768 kinds of declarations (parameters, typenames, etc.). */
8771 && storage_class != sc_extern
8772 && storage_class != sc_static)
8773 || declspecs->specs[(int)ds_typedef]))
8775 error ("multiple storage classes in declaration of %qs", name);
8778 if (decl_context != NORMAL
8779 && ((storage_class != sc_none
8780 && storage_class != sc_mutable)
8783 if ((decl_context == PARM || decl_context == CATCHPARM)
8784 && (storage_class == sc_register
8785 || storage_class == sc_auto))
8787 else if (declspecs->specs[(int)ds_typedef])
8789 else if (decl_context == FIELD
8790 /* C++ allows static class elements. */
8791 && storage_class == sc_static)
8792 /* C++ also allows inlines and signed and unsigned elements,
8793 but in those cases we don't come in here. */
8797 if (decl_context == FIELD)
8798 error ("storage class specified for %qs", name);
8801 if (decl_context == PARM || decl_context == CATCHPARM)
8802 error ("storage class specified for parameter %qs", name);
8804 error ("storage class specified for typename");
8806 if (storage_class == sc_register
8807 || storage_class == sc_auto
8808 || storage_class == sc_extern
8810 storage_class = sc_none;
8813 else if (storage_class == sc_extern && funcdef_flag
8814 && ! toplevel_bindings_p ())
8815 error ("nested function %qs declared %<extern%>", name);
8816 else if (toplevel_bindings_p ())
8818 if (storage_class == sc_auto)
8819 error ("top-level declaration of %qs specifies %<auto%>", name);
8822 && storage_class != sc_extern
8823 && storage_class != sc_static)
8825 error ("function-scope %qs implicitly auto and declared %<__thread%>",
8830 if (storage_class && friendp)
8832 error ("storage class specifiers invalid in friend function declarations");
8833 storage_class = sc_none;
8838 unqualified_id = NULL_TREE;
8841 unqualified_id = id_declarator->u.id.unqualified_name;
8842 switch (TREE_CODE (unqualified_id))
8845 unqualified_id = TREE_OPERAND (unqualified_id, 0);
8846 if (TYPE_P (unqualified_id))
8847 unqualified_id = constructor_name (unqualified_id);
8850 case IDENTIFIER_NODE:
8851 case TEMPLATE_ID_EXPR:
8859 /* Determine the type of the entity declared by recurring on the
8861 for (; declarator; declarator = declarator->declarator)
8863 const cp_declarator *inner_declarator;
8866 if (type == error_mark_node)
8867 return error_mark_node;
8869 attrs = declarator->attributes;
8875 if (declarator == NULL || declarator->kind == cdk_id)
8876 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
8877 if (declarator->kind == cdk_function)
8878 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
8879 if (declarator->kind == cdk_array)
8880 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
8881 returned_attrs = decl_attributes (&type,
8882 chainon (returned_attrs, attrs),
8886 if (declarator->kind == cdk_id)
8889 inner_declarator = declarator->declarator;
8891 switch (declarator->kind)
8894 type = create_array_type_for_decl (dname, type,
8895 declarator->u.array.bounds);
8903 /* Declaring a function type.
8904 Make sure we have a valid type for the function to return. */
8906 if (type_quals != TYPE_UNQUALIFIED)
8908 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
8909 warning (OPT_Wignored_qualifiers,
8910 "type qualifiers ignored on function return type");
8911 /* We now know that the TYPE_QUALS don't apply to the
8912 decl, but to its return type. */
8913 type_quals = TYPE_UNQUALIFIED;
8915 errmsg = targetm.invalid_return_type (type);
8919 type = integer_type_node;
8922 /* Error about some types functions can't return. */
8924 if (TREE_CODE (type) == FUNCTION_TYPE)
8926 error ("%qs declared as function returning a function", name);
8927 return error_mark_node;
8929 if (TREE_CODE (type) == ARRAY_TYPE)
8931 error ("%qs declared as function returning an array", name);
8932 return error_mark_node;
8935 /* Pick up type qualifiers which should be applied to `this'. */
8936 memfn_quals = declarator->u.function.qualifiers;
8937 /* Pick up virt-specifiers. */
8938 virt_specifiers = declarator->u.function.virt_specifiers;
8939 /* Pick up the exception specifications. */
8940 raises = declarator->u.function.exception_specification;
8942 /* Say it's a definition only for the CALL_EXPR
8943 closest to the identifier. */
8944 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
8946 /* Handle a late-specified return type. */
8949 if (type_uses_auto (type))
8951 if (!declarator->u.function.late_return_type)
8953 error ("%qs function uses %<auto%> type specifier without"
8954 " late return type", name);
8955 return error_mark_node;
8957 else if (!is_auto (type))
8959 error ("%qs function with late return type has"
8960 " %qT as its type rather than plain %<auto%>",
8962 return error_mark_node;
8965 else if (declarator->u.function.late_return_type)
8967 error ("%qs function with late return type not declared"
8968 " with %<auto%> type specifier", name);
8969 return error_mark_node;
8972 type = splice_late_return_type
8973 (type, declarator->u.function.late_return_type);
8974 if (type == error_mark_node)
8975 return error_mark_node;
8977 if (ctype == NULL_TREE
8978 && decl_context == FIELD
8980 && (friendp == 0 || dname == current_class_name))
8981 ctype = current_class_type;
8983 if (ctype && (sfk == sfk_constructor
8984 || sfk == sfk_destructor))
8986 /* We are within a class's scope. If our declarator name
8987 is the same as the class name, and we are defining
8988 a function, then it is a constructor/destructor, and
8989 therefore returns a void type. */
8991 /* ISO C++ 12.4/2. A destructor may not be declared
8992 const or volatile. A destructor may not be
8995 ISO C++ 12.1. A constructor may not be declared
8996 const or volatile. A constructor may not be
8997 virtual. A constructor may not be static. */
8999 error ((flags == DTOR_FLAG)
9000 ? "destructor cannot be static member function"
9001 : "constructor cannot be static member function");
9004 error ((flags == DTOR_FLAG)
9005 ? "destructors may not be cv-qualified"
9006 : "constructors may not be cv-qualified");
9007 memfn_quals = TYPE_UNQUALIFIED;
9010 if (decl_context == FIELD
9011 && !member_function_or_else (ctype,
9014 return error_mark_node;
9016 if (flags != DTOR_FLAG)
9018 /* It's a constructor. */
9023 permerror (input_location, "constructors cannot be declared virtual");
9026 if (decl_context == FIELD
9027 && sfk != sfk_constructor)
9028 return error_mark_node;
9030 if (decl_context == FIELD)
9036 error ("can%'t initialize friend function %qs", name);
9039 /* Cannot be both friend and virtual. */
9040 error ("virtual functions cannot be friends");
9043 if (decl_context == NORMAL)
9044 error ("friend declaration not in class definition");
9045 if (current_function_decl && funcdef_flag)
9046 error ("can%'t define friend function %qs in a local "
9050 else if (ctype && sfk == sfk_conversion)
9054 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION);
9059 arg_types = grokparms (declarator->u.function.parameters,
9062 if (inner_declarator
9063 && inner_declarator->kind == cdk_id
9064 && inner_declarator->u.id.sfk == sfk_destructor
9065 && arg_types != void_list_node)
9067 error ("destructors may not have parameters");
9068 arg_types = void_list_node;
9072 type = build_function_type (type, arg_types);
9079 /* Filter out pointers-to-references and references-to-references.
9080 We can get these if a TYPE_DECL is used. */
9082 if (TREE_CODE (type) == REFERENCE_TYPE)
9084 if (declarator->kind != cdk_reference)
9086 error ("cannot declare pointer to %q#T", type);
9087 type = TREE_TYPE (type);
9090 /* In C++0x, we allow reference to reference declarations
9091 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9092 and template type arguments [14.3.1/4 temp.arg.type]. The
9093 check for direct reference to reference declarations, which
9094 are still forbidden, occurs below. Reasoning behind the change
9095 can be found in DR106, DR540, and the rvalue reference
9097 else if (cxx_dialect == cxx98)
9099 error ("cannot declare reference to %q#T", type);
9100 type = TREE_TYPE (type);
9103 else if (VOID_TYPE_P (type))
9105 if (declarator->kind == cdk_reference)
9106 error ("cannot declare reference to %q#T", type);
9107 else if (declarator->kind == cdk_ptrmem)
9108 error ("cannot declare pointer to %q#T member", type);
9111 /* We now know that the TYPE_QUALS don't apply to the decl,
9112 but to the target of the pointer. */
9113 type_quals = TYPE_UNQUALIFIED;
9115 if (declarator->kind == cdk_ptrmem
9116 && (TREE_CODE (type) == FUNCTION_TYPE
9117 || (memfn_quals && TREE_CODE (type) == METHOD_TYPE)))
9119 memfn_quals |= type_memfn_quals (type);
9120 type = build_memfn_type (type,
9121 declarator->u.pointer.class_type,
9123 if (type == error_mark_node)
9124 return error_mark_node;
9125 memfn_quals = TYPE_UNQUALIFIED;
9128 if (TREE_CODE (type) == FUNCTION_TYPE
9129 && type_memfn_quals (type) != TYPE_UNQUALIFIED)
9130 error (declarator->kind == cdk_reference
9131 ? G_("cannot declare reference to qualified function type %qT")
9132 : G_("cannot declare pointer to qualified function type %qT"),
9135 /* When the pointed-to type involves components of variable size,
9136 care must be taken to ensure that the size evaluation code is
9137 emitted early enough to dominate all the possible later uses
9138 and late enough for the variables on which it depends to have
9141 This is expected to happen automatically when the pointed-to
9142 type has a name/declaration of it's own, but special attention
9143 is required if the type is anonymous.
9145 We handle the NORMAL and FIELD contexts here by inserting a
9146 dummy statement that just evaluates the size at a safe point
9147 and ensures it is not deferred until e.g. within a deeper
9148 conditional context (c++/43555).
9150 We expect nothing to be needed here for PARM or TYPENAME.
9151 Evaluating the size at this point for TYPENAME would
9152 actually be incorrect, as we might be in the middle of an
9153 expression with side effects on the pointed-to type size
9154 "arguments" prior to the pointer declaration point and the
9155 size evaluation could end up prior to the side effects. */
9157 if (!TYPE_NAME (type)
9158 && (decl_context == NORMAL || decl_context == FIELD)
9159 && at_function_scope_p ()
9160 && variably_modified_type_p (type, NULL_TREE))
9162 /* First break out any side-effects. */
9163 stabilize_vla_size (TYPE_SIZE (type));
9164 /* And then force evaluation of the SAVE_EXPR. */
9165 finish_expr_stmt (TYPE_SIZE (type));
9168 if (declarator->kind == cdk_reference)
9170 /* In C++0x, the type we are creating a reference to might be
9171 a typedef which is itself a reference type. In that case,
9172 we follow the reference collapsing rules in
9173 [7.1.3/8 dcl.typedef] to create the final reference type:
9175 "If a typedef TD names a type that is a reference to a type
9176 T, an attempt to create the type 'lvalue reference to cv TD'
9177 creates the type 'lvalue reference to T,' while an attempt
9178 to create the type "rvalue reference to cv TD' creates the
9181 if (!VOID_TYPE_P (type))
9182 type = cp_build_reference_type
9183 ((TREE_CODE (type) == REFERENCE_TYPE
9184 ? TREE_TYPE (type) : type),
9185 (declarator->u.reference.rvalue_ref
9186 && (TREE_CODE(type) != REFERENCE_TYPE
9187 || TYPE_REF_IS_RVALUE (type))));
9189 /* In C++0x, we need this check for direct reference to
9190 reference declarations, which are forbidden by
9191 [8.3.2/5 dcl.ref]. Reference to reference declarations
9192 are only allowed indirectly through typedefs and template
9193 type arguments. Example:
9195 void foo(int & &); // invalid ref-to-ref decl
9197 typedef int & int_ref;
9198 void foo(int_ref &); // valid ref-to-ref decl
9200 if (inner_declarator && inner_declarator->kind == cdk_reference)
9201 error ("cannot declare reference to %q#T, which is not "
9202 "a typedef or a template type argument", type);
9204 else if (TREE_CODE (type) == METHOD_TYPE)
9205 type = build_ptrmemfunc_type (build_pointer_type (type));
9206 else if (declarator->kind == cdk_ptrmem)
9208 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
9210 if (declarator->u.pointer.class_type == error_mark_node)
9211 /* We will already have complained. */
9212 type = error_mark_node;
9214 type = build_ptrmem_type (declarator->u.pointer.class_type,
9218 type = build_pointer_type (type);
9220 /* Process a list of type modifier keywords (such as
9221 const or volatile) that were given inside the `*' or `&'. */
9223 if (declarator->u.pointer.qualifiers)
9226 = cp_build_qualified_type (type,
9227 declarator->u.pointer.qualifiers);
9228 type_quals = cp_type_quals (type);
9241 /* We need to stabilize side-effects in VLA sizes for regular array
9242 declarations too, not just pointers to arrays. */
9243 if (type != error_mark_node && !TYPE_NAME (type)
9244 && (decl_context == NORMAL || decl_context == FIELD)
9245 && at_function_scope_p ()
9246 && variably_modified_type_p (type, NULL_TREE))
9247 stabilize_vla_size (TYPE_SIZE (type));
9249 /* A `constexpr' specifier used in an object declaration declares
9250 the object as `const'. */
9251 if (constexpr_p && innermost_code != cdk_function)
9253 if (type_quals & TYPE_QUAL_CONST)
9254 error ("both %<const%> and %<constexpr%> cannot be used here");
9255 if (type_quals & TYPE_QUAL_VOLATILE)
9256 error ("both %<volatile%> and %<constexpr%> cannot be used here");
9257 type_quals |= TYPE_QUAL_CONST;
9258 type = cp_build_qualified_type (type, type_quals);
9261 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
9262 && TREE_CODE (type) != FUNCTION_TYPE
9263 && TREE_CODE (type) != METHOD_TYPE)
9265 error ("template-id %qD used as a declarator",
9267 unqualified_id = dname;
9270 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
9271 qualified with a class-name, turn it into a METHOD_TYPE, unless
9272 we know that the function is static. We take advantage of this
9273 opportunity to do other processing that pertains to entities
9274 explicitly declared to be class members. Note that if DECLARATOR
9275 is non-NULL, we know it is a cdk_id declarator; otherwise, we
9276 would not have exited the loop above. */
9278 && declarator->u.id.qualifying_scope
9279 && TYPE_P (declarator->u.id.qualifying_scope))
9283 ctype = declarator->u.id.qualifying_scope;
9284 ctype = TYPE_MAIN_VARIANT (ctype);
9286 while (t != NULL_TREE && CLASS_TYPE_P (t))
9288 /* You're supposed to have one `template <...>' for every
9289 template class, but you don't need one for a full
9290 specialization. For example:
9292 template <class T> struct S{};
9293 template <> struct S<int> { void f(); };
9294 void S<int>::f () {}
9296 is correct; there shouldn't be a `template <>' for the
9297 definition of `S<int>::f'. */
9298 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
9299 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
9300 /* T is an explicit (not partial) specialization. All
9301 containing classes must therefore also be explicitly
9304 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
9305 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
9306 template_count += 1;
9308 t = TYPE_MAIN_DECL (t);
9309 t = DECL_CONTEXT (t);
9312 if (ctype == current_class_type)
9316 permerror (input_location, "member functions are implicitly friends of their class");
9320 permerror (declarator->id_loc,
9321 "extra qualification %<%T::%> on member %qs",
9324 else if (/* If the qualifying type is already complete, then we
9325 can skip the following checks. */
9326 !COMPLETE_TYPE_P (ctype)
9327 && (/* If the function is being defined, then
9328 qualifying type must certainly be complete. */
9330 /* A friend declaration of "T::f" is OK, even if
9331 "T" is a template parameter. But, if this
9332 function is not a friend, the qualifying type
9334 || (!friendp && !CLASS_TYPE_P (ctype))
9335 /* For a declaration, the type need not be
9336 complete, if either it is dependent (since there
9337 is no meaningful definition of complete in that
9338 case) or the qualifying class is currently being
9340 || !(dependent_type_p (ctype)
9341 || currently_open_class (ctype)))
9342 /* Check that the qualifying type is complete. */
9343 && !complete_type_or_else (ctype, NULL_TREE))
9344 return error_mark_node;
9345 else if (TREE_CODE (type) == FUNCTION_TYPE)
9347 if (current_class_type
9348 && (!friendp || funcdef_flag))
9351 ? "cannot define member function %<%T::%s%> within %<%T%>"
9352 : "cannot declare member function %<%T::%s%> within %<%T%>",
9353 ctype, name, current_class_type);
9354 return error_mark_node;
9357 else if (declspecs->specs[(int)ds_typedef]
9358 && current_class_type)
9360 error ("cannot declare member %<%T::%s%> within %qT",
9361 ctype, name, current_class_type);
9362 return error_mark_node;
9366 if (ctype == NULL_TREE && decl_context == FIELD && friendp == 0)
9367 ctype = current_class_type;
9369 /* Now TYPE has the actual type. */
9374 *attrlist = chainon (returned_attrs, *attrlist);
9376 attrlist = &returned_attrs;
9379 /* Handle parameter packs. */
9380 if (parameter_pack_p)
9382 if (decl_context == PARM)
9383 /* Turn the type into a pack expansion.*/
9384 type = make_pack_expansion (type);
9386 error ("non-parameter %qs cannot be a parameter pack", name);
9389 /* Did array size calculations overflow? */
9391 if (TREE_CODE (type) == ARRAY_TYPE
9392 && COMPLETE_TYPE_P (type)
9393 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
9394 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
9396 error ("size of array %qs is too large", name);
9397 /* If we proceed with the array type as it is, we'll eventually
9398 crash in tree_low_cst(). */
9399 type = error_mark_node;
9402 if ((decl_context == FIELD || decl_context == PARM)
9403 && !processing_template_decl
9404 && variably_modified_type_p (type, NULL_TREE))
9406 if (decl_context == FIELD)
9407 error ("data member may not have variably modified type %qT", type);
9409 error ("parameter may not have variably modified type %qT", type);
9410 type = error_mark_node;
9413 if (explicitp == 1 || (explicitp && friendp))
9415 /* [dcl.fct.spec] The explicit specifier shall only be used in
9416 declarations of constructors within a class definition. */
9417 error ("only declarations of constructors can be %<explicit%>");
9421 if (storage_class == sc_mutable)
9423 if (decl_context != FIELD || friendp)
9425 error ("non-member %qs cannot be declared %<mutable%>", name);
9426 storage_class = sc_none;
9428 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
9430 error ("non-object member %qs cannot be declared %<mutable%>", name);
9431 storage_class = sc_none;
9433 else if (TREE_CODE (type) == FUNCTION_TYPE
9434 || TREE_CODE (type) == METHOD_TYPE)
9436 error ("function %qs cannot be declared %<mutable%>", name);
9437 storage_class = sc_none;
9441 error ("static %qs cannot be declared %<mutable%>", name);
9442 storage_class = sc_none;
9444 else if (type_quals & TYPE_QUAL_CONST)
9446 error ("const %qs cannot be declared %<mutable%>", name);
9447 storage_class = sc_none;
9449 else if (TREE_CODE (type) == REFERENCE_TYPE)
9451 permerror (input_location, "reference %qs cannot be declared "
9452 "%<mutable%>", name);
9453 storage_class = sc_none;
9457 /* If this is declaring a typedef name, return a TYPE_DECL. */
9458 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
9462 /* Note that the grammar rejects storage classes
9463 in typenames, fields or parameters. */
9464 if (current_lang_name == lang_name_java)
9465 TYPE_FOR_JAVA (type) = 1;
9467 /* This declaration:
9469 typedef void f(int) const;
9471 declares a function type which is not a member of any
9472 particular class, but which is cv-qualified; for
9473 example "f S::*" declares a pointer to a const-qualified
9474 member function of S. We record the cv-qualification in the
9476 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
9478 type = apply_memfn_quals (type, memfn_quals);
9480 /* We have now dealt with these qualifiers. */
9481 memfn_quals = TYPE_UNQUALIFIED;
9484 if (type_uses_auto (type))
9486 error ("typedef declared %<auto%>");
9487 type = error_mark_node;
9490 if (decl_context == FIELD)
9491 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
9493 decl = build_decl (input_location, TYPE_DECL, unqualified_id, type);
9494 if (id_declarator && declarator->u.id.qualifying_scope) {
9495 error_at (DECL_SOURCE_LOCATION (decl),
9496 "typedef name may not be a nested-name-specifier");
9497 TREE_TYPE (decl) = error_mark_node;
9500 if (decl_context != FIELD)
9502 if (!current_function_decl)
9503 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
9504 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
9505 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
9506 (current_function_decl)))
9507 /* The TYPE_DECL is "abstract" because there will be
9508 clones of this constructor/destructor, and there will
9509 be copies of this TYPE_DECL generated in those
9511 DECL_ABSTRACT (decl) = 1;
9513 else if (constructor_name_p (unqualified_id, current_class_type))
9514 permerror (input_location, "ISO C++ forbids nested type %qD with same name "
9515 "as enclosing class",
9518 /* If the user declares "typedef struct {...} foo" then the
9519 struct will have an anonymous name. Fill that name in now.
9520 Nothing can refer to it, so nothing needs know about the name
9522 if (type != error_mark_node
9525 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
9526 && TYPE_ANONYMOUS_P (type)
9527 && cp_type_quals (type) == TYPE_UNQUALIFIED)
9531 /* Replace the anonymous name with the real name everywhere. */
9532 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
9534 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
9535 /* We do not rename the debug info representing the
9536 anonymous tagged type because the standard says in
9537 [dcl.typedef] that the naming applies only for
9538 linkage purposes. */
9539 /*debug_hooks->set_name (t, decl);*/
9540 TYPE_NAME (t) = decl;
9543 if (TYPE_LANG_SPECIFIC (type))
9544 TYPE_WAS_ANONYMOUS (type) = 1;
9546 /* If this is a typedef within a template class, the nested
9547 type is a (non-primary) template. The name for the
9548 template needs updating as well. */
9549 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
9550 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
9551 = TYPE_IDENTIFIER (type);
9553 /* Adjust linkage now that we aren't anonymous anymore. */
9554 set_linkage_according_to_type (type, TYPE_MAIN_DECL (type));
9555 determine_visibility (TYPE_MAIN_DECL (type));
9557 /* FIXME remangle member functions; member functions of a
9558 type with external linkage have external linkage. */
9562 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
9563 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
9565 bad_specifiers (decl, BSP_TYPE, virtualp,
9566 memfn_quals != TYPE_UNQUALIFIED,
9567 inlinep, friendp, raises != NULL_TREE);
9572 /* Detect the case of an array type of unspecified size
9573 which came, as such, direct from a typedef name.
9574 We must copy the type, so that the array's domain can be
9575 individually set by the object's initializer. */
9577 if (type && typedef_type
9578 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
9579 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
9580 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
9582 /* Detect where we're using a typedef of function type to declare a
9583 function. PARMS will not be set, so we must create it now. */
9585 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
9587 tree decls = NULL_TREE;
9590 for (args = TYPE_ARG_TYPES (type);
9591 args && args != void_list_node;
9592 args = TREE_CHAIN (args))
9594 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
9596 DECL_CHAIN (decl) = decls;
9600 parms = nreverse (decls);
9602 if (decl_context != TYPENAME)
9604 /* A cv-qualifier-seq shall only be part of the function type
9605 for a non-static member function. [8.3.5/4 dcl.fct] */
9606 if (type_memfn_quals (type) != TYPE_UNQUALIFIED
9607 && (current_class_type == NULL_TREE || staticp) )
9610 ? G_("qualified function types cannot be used to "
9611 "declare static member functions")
9612 : G_("qualified function types cannot be used to "
9613 "declare free functions"));
9614 type = TYPE_MAIN_VARIANT (type);
9617 /* The qualifiers on the function type become the qualifiers on
9618 the non-static member function. */
9619 memfn_quals |= type_memfn_quals (type);
9620 type_quals = TYPE_UNQUALIFIED;
9624 /* If this is a type name (such as, in a cast or sizeof),
9625 compute the type and return it now. */
9627 if (decl_context == TYPENAME)
9629 /* Note that the grammar rejects storage classes
9630 in typenames, fields or parameters. */
9631 if (type_quals != TYPE_UNQUALIFIED)
9632 type_quals = TYPE_UNQUALIFIED;
9634 /* Special case: "friend class foo" looks like a TYPENAME context. */
9637 if (type_quals != TYPE_UNQUALIFIED)
9639 error ("type qualifiers specified for friend class declaration");
9640 type_quals = TYPE_UNQUALIFIED;
9644 error ("%<inline%> specified for friend class declaration");
9650 /* Don't allow friend declaration without a class-key. */
9651 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9652 permerror (input_location, "template parameters cannot be friends");
9653 else if (TREE_CODE (type) == TYPENAME_TYPE)
9654 permerror (input_location, "friend declaration requires class-key, "
9655 "i.e. %<friend class %T::%D%>",
9656 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
9658 permerror (input_location, "friend declaration requires class-key, "
9659 "i.e. %<friend %#T%>",
9663 /* Only try to do this stuff if we didn't already give up. */
9664 if (type != integer_type_node)
9666 /* A friendly class? */
9667 if (current_class_type)
9668 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
9671 error ("trying to make class %qT a friend of global scope",
9674 type = void_type_node;
9677 else if (memfn_quals)
9679 if (ctype == NULL_TREE
9680 && TREE_CODE (type) == METHOD_TYPE)
9681 ctype = TYPE_METHOD_BASETYPE (type);
9684 type = build_memfn_type (type, ctype, memfn_quals);
9685 /* Core issue #547: need to allow this in template type args. */
9686 else if (template_type_arg && TREE_CODE (type) == FUNCTION_TYPE)
9687 type = apply_memfn_quals (type, memfn_quals);
9689 error ("invalid qualifiers on non-member function type");
9694 else if (unqualified_id == NULL_TREE && decl_context != PARM
9695 && decl_context != CATCHPARM
9696 && TREE_CODE (type) != UNION_TYPE
9699 error ("abstract declarator %qT used as declaration", type);
9700 return error_mark_node;
9703 /* Only functions may be declared using an operator-function-id. */
9705 && IDENTIFIER_OPNAME_P (unqualified_id)
9706 && TREE_CODE (type) != FUNCTION_TYPE
9707 && TREE_CODE (type) != METHOD_TYPE)
9709 error ("declaration of %qD as non-function", unqualified_id);
9710 return error_mark_node;
9713 /* We don't check parameter types here because we can emit a better
9714 error message later. */
9715 if (decl_context != PARM)
9717 type = check_var_type (unqualified_id, type);
9718 if (type == error_mark_node)
9719 return error_mark_node;
9722 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9723 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9725 if (decl_context == PARM || decl_context == CATCHPARM)
9727 if (ctype || in_namespace)
9728 error ("cannot use %<::%> in parameter declaration");
9730 if (type_uses_auto (type))
9732 error ("parameter declared %<auto%>");
9733 type = error_mark_node;
9736 /* A parameter declared as an array of T is really a pointer to T.
9737 One declared as a function is really a pointer to a function.
9738 One declared as a member is really a pointer to member. */
9740 if (TREE_CODE (type) == ARRAY_TYPE)
9742 /* Transfer const-ness of array into that of type pointed to. */
9743 type = build_pointer_type (TREE_TYPE (type));
9744 type_quals = TYPE_UNQUALIFIED;
9746 else if (TREE_CODE (type) == FUNCTION_TYPE)
9747 type = build_pointer_type (type);
9750 if (ctype && TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
9751 && !NEW_DELETE_OPNAME_P (unqualified_id))
9753 cp_cv_quals real_quals = memfn_quals;
9754 if (constexpr_p && sfk != sfk_constructor && sfk != sfk_destructor)
9755 real_quals |= TYPE_QUAL_CONST;
9756 type = build_memfn_type (type, ctype, real_quals);
9762 if (decl_context == PARM)
9764 decl = cp_build_parm_decl (unqualified_id, type);
9766 bad_specifiers (decl, BSP_PARM, virtualp,
9767 memfn_quals != TYPE_UNQUALIFIED,
9768 inlinep, friendp, raises != NULL_TREE);
9770 else if (decl_context == FIELD)
9772 /* The C99 flexible array extension. */
9773 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
9774 && TYPE_DOMAIN (type) == NULL_TREE)
9776 tree itype = compute_array_index_type (dname, integer_zero_node,
9777 tf_warning_or_error);
9778 type = build_cplus_array_type (TREE_TYPE (type), itype);
9781 if (type == error_mark_node)
9783 /* Happens when declaring arrays of sizes which
9784 are error_mark_node, for example. */
9787 else if (in_namespace && !friendp)
9789 /* Something like struct S { int N::j; }; */
9790 error ("invalid use of %<::%>");
9791 return error_mark_node;
9793 else if (TREE_CODE (type) == FUNCTION_TYPE
9794 || TREE_CODE (type) == METHOD_TYPE)
9797 tree function_context;
9801 /* This should never happen in pure C++ (the check
9802 could be an assert). It could happen in
9803 Objective-C++ if someone writes invalid code that
9804 uses a function declaration for an instance
9805 variable or property (instance variables and
9806 properties are parsed as FIELD_DECLs, but they are
9807 part of an Objective-C class, not a C++ class).
9808 That code is invalid and is caught by this
9812 error ("declaration of function %qD in invalid context",
9814 return error_mark_node;
9817 /* ``A union may [ ... ] not [ have ] virtual functions.''
9819 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
9821 error ("function %qD declared virtual inside a union",
9823 return error_mark_node;
9826 if (NEW_DELETE_OPNAME_P (unqualified_id))
9830 error ("%qD cannot be declared virtual, since it "
9838 /* Check that the name used for a destructor makes sense. */
9839 if (sfk == sfk_destructor)
9841 tree uqname = id_declarator->u.id.unqualified_name;
9845 gcc_assert (friendp);
9846 error ("expected qualified name in friend declaration "
9847 "for destructor %qD", uqname);
9848 return error_mark_node;
9851 if (!check_dtor_name (ctype, TREE_OPERAND (uqname, 0)))
9853 error ("declaration of %qD as member of %qT",
9855 return error_mark_node;
9859 error ("a destructor cannot be %<constexpr%>");
9860 return error_mark_node;
9863 else if (sfk == sfk_constructor && friendp && !ctype)
9865 error ("expected qualified name in friend declaration "
9866 "for constructor %qD",
9867 id_declarator->u.id.unqualified_name);
9868 return error_mark_node;
9871 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
9872 function_context = (ctype != NULL_TREE) ?
9873 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
9874 publicp = (! friendp || ! staticp)
9875 && function_context == NULL_TREE;
9876 decl = grokfndecl (ctype, type,
9877 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9878 ? unqualified_id : dname,
9881 virtualp, flags, memfn_quals, raises,
9882 friendp ? -1 : 0, friendp, publicp,
9883 inlinep | (2 * constexpr_p),
9885 funcdef_flag, template_count, in_namespace,
9886 attrlist, declarator->id_loc);
9887 decl = set_virt_specifiers (decl, virt_specifiers);
9888 if (decl == NULL_TREE)
9889 return error_mark_node;
9891 /* This clobbers the attrs stored in `decl' from `attrlist'. */
9892 /* The decl and setting of decl_attr is also turned off. */
9893 decl = build_decl_attribute_variant (decl, decl_attr);
9896 /* [class.conv.ctor]
9898 A constructor declared without the function-specifier
9899 explicit that can be called with a single parameter
9900 specifies a conversion from the type of its first
9901 parameter to the type of its class. Such a constructor
9902 is called a converting constructor. */
9904 DECL_NONCONVERTING_P (decl) = 1;
9906 else if (!staticp && !dependent_type_p (type)
9907 && !COMPLETE_TYPE_P (complete_type (type))
9908 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
9911 error ("field %qD has incomplete type", unqualified_id);
9913 error ("name %qT has incomplete type", type);
9915 /* If we're instantiating a template, tell them which
9916 instantiation made the field's type be incomplete. */
9917 if (current_class_type
9918 && TYPE_NAME (current_class_type)
9919 && IDENTIFIER_TEMPLATE (current_class_name)
9921 && declspecs->type == type)
9922 error (" in instantiation of template %qT",
9923 current_class_type);
9925 return error_mark_node;
9931 error ("%qE is neither function nor member function; "
9932 "cannot be declared friend", unqualified_id);
9940 /* Friends are treated specially. */
9941 if (ctype == current_class_type)
9942 ; /* We already issued a permerror. */
9943 else if (decl && DECL_NAME (decl))
9945 if (template_class_depth (current_class_type) == 0)
9947 decl = check_explicit_specialization
9948 (unqualified_id, decl, template_count,
9949 2 * funcdef_flag + 4);
9950 if (decl == error_mark_node)
9951 return error_mark_node;
9954 decl = do_friend (ctype, unqualified_id, decl,
9960 return error_mark_node;
9963 /* Structure field. It may not be a function, except for C++. */
9965 if (decl == NULL_TREE)
9971 /* An attempt is being made to initialize a non-static
9972 member. But, from [class.mem]:
9974 4 A member-declarator can contain a
9975 constant-initializer only if it declares a static
9976 member (_class.static_) of integral or enumeration
9977 type, see _class.static.data_.
9979 This used to be relatively common practice, but
9980 the rest of the compiler does not correctly
9981 handle the initialization unless the member is
9982 static so we make it static below. */
9983 if (cxx_dialect >= cxx0x)
9985 sorry ("non-static data member initializers");
9989 permerror (input_location, "ISO C++ forbids initialization of member %qD",
9991 permerror (input_location, "making %qD static", unqualified_id);
9996 if (uses_template_parms (type))
9997 /* We'll check at instantiation time. */
9999 else if (constexpr_p)
10000 /* constexpr has the same requirements. */
10002 else if (check_static_variable_definition (unqualified_id,
10004 /* If we just return the declaration, crashes
10005 will sometimes occur. We therefore return
10006 void_type_node, as if this was a friend
10007 declaration, to cause callers to completely
10008 ignore this declaration. */
10009 return error_mark_node;
10014 /* C++ allows static class members. All other work
10015 for this is done by grokfield. */
10016 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
10017 set_linkage_for_static_data_member (decl);
10018 /* Even if there is an in-class initialization, DECL
10019 is considered undefined until an out-of-class
10020 definition is provided. */
10021 DECL_EXTERNAL (decl) = 1;
10024 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
10026 if (constexpr_p && !initialized)
10028 error ("constexpr static data member %qD must have an "
10029 "initializer", decl);
10030 constexpr_p = false;
10037 error ("non-static data member %qE declared %<constexpr%>",
10039 constexpr_p = false;
10041 decl = build_decl (input_location,
10042 FIELD_DECL, unqualified_id, type);
10043 DECL_NONADDRESSABLE_P (decl) = bitfield;
10044 if (bitfield && !unqualified_id)
10045 TREE_NO_WARNING (decl) = 1;
10047 if (storage_class == sc_mutable)
10049 DECL_MUTABLE_P (decl) = 1;
10050 storage_class = sc_none;
10054 bad_specifiers (decl, BSP_FIELD, virtualp,
10055 memfn_quals != TYPE_UNQUALIFIED,
10056 inlinep, friendp, raises != NULL_TREE);
10059 else if (TREE_CODE (type) == FUNCTION_TYPE
10060 || TREE_CODE (type) == METHOD_TYPE)
10062 tree original_name;
10065 if (!unqualified_id)
10066 return error_mark_node;
10068 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
10069 original_name = dname;
10071 original_name = unqualified_id;
10073 if (storage_class == sc_auto)
10074 error ("storage class %<auto%> invalid for function %qs", name);
10075 else if (storage_class == sc_register)
10076 error ("storage class %<register%> invalid for function %qs", name);
10078 error ("storage class %<__thread%> invalid for function %qs", name);
10080 if (virt_specifiers)
10081 error ("virt-specifiers in %qs not allowed outside a class definition", name);
10082 /* Function declaration not at top level.
10083 Storage classes other than `extern' are not allowed
10084 and `extern' makes no difference. */
10085 if (! toplevel_bindings_p ()
10086 && (storage_class == sc_static
10087 || declspecs->specs[(int)ds_inline])
10090 if (storage_class == sc_static)
10091 pedwarn (input_location, OPT_pedantic,
10092 "%<static%> specified invalid for function %qs "
10093 "declared out of global scope", name);
10095 pedwarn (input_location, OPT_pedantic,
10096 "%<inline%> specifier invalid for function %qs "
10097 "declared out of global scope", name);
10100 if (ctype != NULL_TREE
10101 && TREE_CODE (ctype) != NAMESPACE_DECL && !MAYBE_CLASS_TYPE_P (ctype))
10103 error ("%q#T is not a class or a namespace", ctype);
10107 if (ctype == NULL_TREE)
10111 error ("virtual non-class function %qs", name);
10114 else if (sfk == sfk_constructor
10115 || sfk == sfk_destructor)
10117 error (funcdef_flag
10118 ? "%qs defined in a non-class scope"
10119 : "%qs declared in a non-class scope", name);
10124 /* Record presence of `static'. */
10125 publicp = (ctype != NULL_TREE
10126 || storage_class == sc_extern
10127 || storage_class != sc_static);
10129 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
10130 virtualp, flags, memfn_quals, raises,
10132 publicp, inlinep | (2 * constexpr_p), sfk,
10134 template_count, in_namespace, attrlist,
10135 declarator->id_loc);
10136 if (decl == NULL_TREE)
10137 return error_mark_node;
10141 int invalid_static = 0;
10143 /* Don't allow a static member function in a class, and forbid
10144 declaring main to be static. */
10145 if (TREE_CODE (type) == METHOD_TYPE)
10147 permerror (input_location, "cannot declare member function %qD to have "
10148 "static linkage", decl);
10149 invalid_static = 1;
10151 else if (current_function_decl)
10153 /* FIXME need arm citation */
10154 error ("cannot declare static function inside another function");
10155 invalid_static = 1;
10158 if (invalid_static)
10161 storage_class = sc_none;
10167 /* It's a variable. */
10169 /* An uninitialized decl with `extern' is a reference. */
10170 decl = grokvardecl (type, unqualified_id,
10173 (type_quals & TYPE_QUAL_CONST) != 0,
10174 ctype ? ctype : in_namespace);
10175 bad_specifiers (decl, BSP_VAR, virtualp,
10176 memfn_quals != TYPE_UNQUALIFIED,
10177 inlinep, friendp, raises != NULL_TREE);
10181 DECL_CONTEXT (decl) = ctype;
10184 permerror (input_location, "%<static%> may not be used when defining "
10185 "(as opposed to declaring) a static data member");
10187 storage_class = sc_none;
10189 if (storage_class == sc_register && TREE_STATIC (decl))
10191 error ("static member %qD declared %<register%>", decl);
10192 storage_class = sc_none;
10194 if (storage_class == sc_extern && pedantic)
10196 pedwarn (input_location, OPT_pedantic,
10197 "cannot explicitly declare member %q#D to have "
10198 "extern linkage", decl);
10199 storage_class = sc_none;
10202 else if (constexpr_p && DECL_EXTERNAL (decl))
10204 error ("declaration of constexpr variable %qD is not a definition",
10206 constexpr_p = false;
10210 if (storage_class == sc_extern && initialized && !funcdef_flag)
10212 if (toplevel_bindings_p ())
10214 /* It's common practice (and completely valid) to have a const
10215 be initialized and declared extern. */
10216 if (!(type_quals & TYPE_QUAL_CONST))
10217 warning (0, "%qs initialized and declared %<extern%>", name);
10221 error ("%qs has both %<extern%> and initializer", name);
10222 return error_mark_node;
10226 /* Record `register' declaration for warnings on &
10227 and in case doing stupid register allocation. */
10229 if (storage_class == sc_register)
10230 DECL_REGISTER (decl) = 1;
10231 else if (storage_class == sc_extern)
10232 DECL_THIS_EXTERN (decl) = 1;
10233 else if (storage_class == sc_static)
10234 DECL_THIS_STATIC (decl) = 1;
10236 /* Set constexpr flag on vars (functions got it in grokfndecl). */
10237 if (constexpr_p && TREE_CODE (decl) == VAR_DECL)
10238 DECL_DECLARED_CONSTEXPR_P (decl) = true;
10240 /* Record constancy and volatility on the DECL itself . There's
10241 no need to do this when processing a template; we'll do this
10242 for the instantiated declaration based on the type of DECL. */
10243 if (!processing_template_decl)
10244 cp_apply_type_quals_to_decl (type_quals, decl);
10250 /* Subroutine of start_function. Ensure that each of the parameter
10251 types (as listed in PARMS) is complete, as is required for a
10252 function definition. */
10255 require_complete_types_for_parms (tree parms)
10257 for (; parms; parms = DECL_CHAIN (parms))
10259 if (dependent_type_p (TREE_TYPE (parms)))
10261 if (!VOID_TYPE_P (TREE_TYPE (parms))
10262 && complete_type_or_else (TREE_TYPE (parms), parms))
10264 relayout_decl (parms);
10265 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
10268 /* grokparms or complete_type_or_else will have already issued
10270 TREE_TYPE (parms) = error_mark_node;
10274 /* Returns nonzero if T is a local variable. */
10277 local_variable_p (const_tree t)
10279 if ((TREE_CODE (t) == VAR_DECL
10280 /* A VAR_DECL with a context that is a _TYPE is a static data
10282 && !TYPE_P (CP_DECL_CONTEXT (t))
10283 /* Any other non-local variable must be at namespace scope. */
10284 && !DECL_NAMESPACE_SCOPE_P (t))
10285 || (TREE_CODE (t) == PARM_DECL))
10291 /* Like local_variable_p, but suitable for use as a tree-walking
10295 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
10296 void *data ATTRIBUTE_UNUSED)
10298 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
10300 else if (TYPE_P (*tp))
10301 *walk_subtrees = 0;
10307 /* Check that ARG, which is a default-argument expression for a
10308 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
10309 something goes wrong. DECL may also be a _TYPE node, rather than a
10310 DECL, if there is no DECL available. */
10313 check_default_argument (tree decl, tree arg)
10318 if (TREE_CODE (arg) == DEFAULT_ARG)
10319 /* We get a DEFAULT_ARG when looking at an in-class declaration
10320 with a default argument. Ignore the argument for now; we'll
10321 deal with it after the class is complete. */
10330 decl_type = TREE_TYPE (decl);
10332 if (arg == error_mark_node
10333 || decl == error_mark_node
10334 || TREE_TYPE (arg) == error_mark_node
10335 || decl_type == error_mark_node)
10336 /* Something already went wrong. There's no need to check
10338 return error_mark_node;
10340 /* [dcl.fct.default]
10342 A default argument expression is implicitly converted to the
10344 if (!TREE_TYPE (arg)
10345 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
10348 error ("default argument for %q#D has type %qT",
10349 decl, TREE_TYPE (arg));
10351 error ("default argument for parameter of type %qT has type %qT",
10352 decl_type, TREE_TYPE (arg));
10354 return error_mark_node;
10357 /* [dcl.fct.default]
10359 Local variables shall not be used in default argument
10362 The keyword `this' shall not be used in a default argument of a
10363 member function. */
10364 var = cp_walk_tree_without_duplicates (&arg, local_variable_p_walkfn, NULL);
10367 error ("default argument %qE uses local variable %qD", arg, var);
10368 return error_mark_node;
10375 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
10378 type_is_deprecated (tree type)
10380 enum tree_code code;
10381 if (TREE_DEPRECATED (type))
10383 if (TYPE_NAME (type)
10384 && TREE_DEPRECATED (TYPE_NAME (type)))
10387 /* Do warn about using typedefs to a deprecated class. */
10388 if (TAGGED_TYPE_P (type) && type != TYPE_MAIN_VARIANT (type))
10389 return type_is_deprecated (TYPE_MAIN_VARIANT (type));
10391 code = TREE_CODE (type);
10393 if (code == POINTER_TYPE || code == REFERENCE_TYPE
10394 || code == OFFSET_TYPE || code == FUNCTION_TYPE
10395 || code == METHOD_TYPE || code == ARRAY_TYPE)
10396 return type_is_deprecated (TREE_TYPE (type));
10398 if (TYPE_PTRMEMFUNC_P (type))
10399 return type_is_deprecated
10400 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type))));
10405 /* Decode the list of parameter types for a function type.
10406 Given the list of things declared inside the parens,
10407 return a list of types.
10409 If this parameter does not end with an ellipsis, we append
10412 *PARMS is set to the chain of PARM_DECLs created. */
10415 grokparms (tree parmlist, tree *parms)
10417 tree result = NULL_TREE;
10418 tree decls = NULL_TREE;
10422 for (parm = parmlist; parm != NULL_TREE; parm = TREE_CHAIN (parm))
10424 tree type = NULL_TREE;
10425 tree init = TREE_PURPOSE (parm);
10426 tree decl = TREE_VALUE (parm);
10427 const char *errmsg;
10429 if (parm == void_list_node)
10432 if (! decl || TREE_TYPE (decl) == error_mark_node)
10435 type = TREE_TYPE (decl);
10436 if (VOID_TYPE_P (type))
10438 if (same_type_p (type, void_type_node)
10439 && DECL_SELF_REFERENCE_P (type)
10440 && !DECL_NAME (decl) && !result && TREE_CHAIN (parm) == void_list_node)
10441 /* this is a parmlist of `(void)', which is ok. */
10443 cxx_incomplete_type_error (decl, type);
10444 /* It's not a good idea to actually create parameters of
10445 type `void'; other parts of the compiler assume that a
10446 void type terminates the parameter list. */
10447 type = error_mark_node;
10448 TREE_TYPE (decl) = error_mark_node;
10451 if (type != error_mark_node
10452 && TYPE_FOR_JAVA (type)
10453 && MAYBE_CLASS_TYPE_P (type))
10455 error ("parameter %qD has Java class type", decl);
10456 type = error_mark_node;
10457 TREE_TYPE (decl) = error_mark_node;
10461 if (type != error_mark_node
10462 && (errmsg = targetm.invalid_parameter_type (type)))
10465 type = error_mark_node;
10466 TREE_TYPE (decl) = error_mark_node;
10469 if (type != error_mark_node)
10471 if (deprecated_state != DEPRECATED_SUPPRESS)
10473 tree deptype = type_is_deprecated (type);
10475 warn_deprecated_use (deptype, NULL_TREE);
10478 /* Top-level qualifiers on the parameters are
10479 ignored for function types. */
10480 type = cp_build_qualified_type (type, 0);
10481 if (TREE_CODE (type) == METHOD_TYPE)
10483 error ("parameter %qD invalidly declared method type", decl);
10484 type = build_pointer_type (type);
10485 TREE_TYPE (decl) = type;
10487 else if (abstract_virtuals_error (decl, type))
10488 any_error = 1; /* Seems like a good idea. */
10489 else if (POINTER_TYPE_P (type))
10491 /* [dcl.fct]/6, parameter types cannot contain pointers
10492 (references) to arrays of unknown bound. */
10493 tree t = TREE_TYPE (type);
10494 int ptr = TYPE_PTR_P (type);
10498 if (TYPE_PTR_P (t))
10500 else if (TREE_CODE (t) != ARRAY_TYPE)
10502 else if (!TYPE_DOMAIN (t))
10506 if (TREE_CODE (t) == ARRAY_TYPE)
10508 ? G_("parameter %qD includes pointer to array of "
10509 "unknown bound %qT")
10510 : G_("parameter %qD includes reference to array of "
10511 "unknown bound %qT"),
10517 else if (init && !processing_template_decl)
10518 init = check_default_argument (decl, init);
10521 if (TREE_CODE (decl) == PARM_DECL
10522 && FUNCTION_PARAMETER_PACK_P (decl)
10523 && TREE_CHAIN (parm)
10524 && TREE_CHAIN (parm) != void_list_node)
10525 error ("parameter packs must be at the end of the parameter list");
10527 DECL_CHAIN (decl) = decls;
10529 result = tree_cons (init, type, result);
10531 decls = nreverse (decls);
10532 result = nreverse (result);
10534 result = chainon (result, void_list_node);
10541 /* D is a constructor or overloaded `operator='.
10543 Let T be the class in which D is declared. Then, this function
10546 -1 if D's is an ill-formed constructor or copy assignment operator
10547 whose first parameter is of type `T'.
10548 0 if D is not a copy constructor or copy assignment
10550 1 if D is a copy constructor or copy assignment operator whose
10551 first parameter is a reference to non-const qualified T.
10552 2 if D is a copy constructor or copy assignment operator whose
10553 first parameter is a reference to const qualified T.
10555 This function can be used as a predicate. Positive values indicate
10556 a copy constructor and nonzero values indicate a copy assignment
10560 copy_fn_p (const_tree d)
10566 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
10568 if (TREE_CODE (d) == TEMPLATE_DECL
10569 || (DECL_TEMPLATE_INFO (d)
10570 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
10571 /* Instantiations of template member functions are never copy
10572 functions. Note that member functions of templated classes are
10573 represented as template functions internally, and we must
10574 accept those as copy functions. */
10577 args = FUNCTION_FIRST_USER_PARMTYPE (d);
10581 arg_type = TREE_VALUE (args);
10582 if (arg_type == error_mark_node)
10585 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
10587 /* Pass by value copy assignment operator. */
10590 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
10591 && !TYPE_REF_IS_RVALUE (arg_type)
10592 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
10594 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
10600 args = TREE_CHAIN (args);
10602 if (args && args != void_list_node && !TREE_PURPOSE (args))
10603 /* There are more non-optional args. */
10609 /* D is a constructor or overloaded `operator='.
10611 Let T be the class in which D is declared. Then, this function
10612 returns true when D is a move constructor or move assignment
10613 operator, false otherwise. */
10616 move_fn_p (const_tree d)
10620 bool result = false;
10622 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
10624 if (cxx_dialect == cxx98)
10625 /* There are no move constructors if we are in C++98 mode. */
10628 if (TREE_CODE (d) == TEMPLATE_DECL
10629 || (DECL_TEMPLATE_INFO (d)
10630 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
10631 /* Instantiations of template member functions are never copy
10632 functions. Note that member functions of templated classes are
10633 represented as template functions internally, and we must
10634 accept those as copy functions. */
10637 args = FUNCTION_FIRST_USER_PARMTYPE (d);
10641 arg_type = TREE_VALUE (args);
10642 if (arg_type == error_mark_node)
10645 if (TREE_CODE (arg_type) == REFERENCE_TYPE
10646 && TYPE_REF_IS_RVALUE (arg_type)
10647 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)),
10651 args = TREE_CHAIN (args);
10653 if (args && args != void_list_node && !TREE_PURPOSE (args))
10654 /* There are more non-optional args. */
10660 /* Remember any special properties of member function DECL. */
10663 grok_special_member_properties (tree decl)
10667 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
10670 class_type = DECL_CONTEXT (decl);
10671 if (DECL_CONSTRUCTOR_P (decl))
10673 int ctor = copy_fn_p (decl);
10675 if (!DECL_ARTIFICIAL (decl))
10676 TYPE_HAS_USER_CONSTRUCTOR (class_type) = 1;
10682 A non-template constructor for class X is a copy
10683 constructor if its first parameter is of type X&, const
10684 X&, volatile X& or const volatile X&, and either there
10685 are no other parameters or else all other parameters have
10686 default arguments. */
10687 TYPE_HAS_COPY_CTOR (class_type) = 1;
10688 if (user_provided_p (decl))
10689 TYPE_HAS_COMPLEX_COPY_CTOR (class_type) = 1;
10691 TYPE_HAS_CONST_COPY_CTOR (class_type) = 1;
10693 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
10695 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
10696 if (user_provided_p (decl))
10697 TYPE_HAS_COMPLEX_DFLT (class_type) = 1;
10699 else if (move_fn_p (decl) && user_provided_p (decl))
10700 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type) = 1;
10701 else if (is_list_ctor (decl))
10702 TYPE_HAS_LIST_CTOR (class_type) = 1;
10704 if (DECL_DECLARED_CONSTEXPR_P (decl)
10705 && !copy_fn_p (decl) && !move_fn_p (decl))
10706 TYPE_HAS_CONSTEXPR_CTOR (class_type) = 1;
10708 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
10712 A non-template assignment operator for class X is a copy
10713 assignment operator if its parameter is of type X, X&, const
10714 X&, volatile X& or const volatile X&. */
10716 int assop = copy_fn_p (decl);
10720 TYPE_HAS_COPY_ASSIGN (class_type) = 1;
10721 if (user_provided_p (decl))
10722 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type) = 1;
10724 TYPE_HAS_CONST_COPY_ASSIGN (class_type) = 1;
10726 else if (move_fn_p (decl) && user_provided_p (decl))
10727 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type) = 1;
10729 /* Destructors are handled in check_methods. */
10732 /* Check a constructor DECL has the correct form. Complains
10733 if the class has a constructor of the form X(X). */
10736 grok_ctor_properties (const_tree ctype, const_tree decl)
10738 int ctor_parm = copy_fn_p (decl);
10744 A declaration of a constructor for a class X is ill-formed if
10745 its first parameter is of type (optionally cv-qualified) X
10746 and either there are no other parameters or else all other
10747 parameters have default arguments.
10749 We *don't* complain about member template instantiations that
10750 have this form, though; they can occur as we try to decide
10751 what constructor to use during overload resolution. Since
10752 overload resolution will never prefer such a constructor to
10753 the non-template copy constructor (which is either explicitly
10754 or implicitly defined), there's no need to worry about their
10755 existence. Theoretically, they should never even be
10756 instantiated, but that's hard to forestall. */
10757 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10765 /* An operator with this code is unary, but can also be binary. */
10768 ambi_op_p (enum tree_code code)
10770 return (code == INDIRECT_REF
10771 || code == ADDR_EXPR
10772 || code == UNARY_PLUS_EXPR
10773 || code == NEGATE_EXPR
10774 || code == PREINCREMENT_EXPR
10775 || code == PREDECREMENT_EXPR);
10778 /* An operator with this name can only be unary. */
10781 unary_op_p (enum tree_code code)
10783 return (code == TRUTH_NOT_EXPR
10784 || code == BIT_NOT_EXPR
10785 || code == COMPONENT_REF
10786 || code == TYPE_EXPR);
10789 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
10790 errors are issued for invalid declarations. */
10793 grok_op_properties (tree decl, bool complain)
10795 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
10797 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
10798 tree name = DECL_NAME (decl);
10799 enum tree_code operator_code;
10804 /* Count the number of arguments and check for ellipsis. */
10805 for (argtype = argtypes, arity = 0;
10806 argtype && argtype != void_list_node;
10807 argtype = TREE_CHAIN (argtype))
10809 ellipsis_p = !argtype;
10811 class_type = DECL_CONTEXT (decl);
10812 if (class_type && !CLASS_TYPE_P (class_type))
10813 class_type = NULL_TREE;
10815 if (DECL_CONV_FN_P (decl))
10816 operator_code = TYPE_EXPR;
10820 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
10821 if (ansi_opname (CODE) == name) \
10823 operator_code = (CODE); \
10826 else if (ansi_assopname (CODE) == name) \
10828 operator_code = (CODE); \
10829 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
10833 #include "operators.def"
10834 #undef DEF_OPERATOR
10836 gcc_unreachable ();
10839 gcc_assert (operator_code != MAX_TREE_CODES);
10840 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10843 switch (operator_code)
10846 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
10850 TYPE_GETS_DELETE (class_type) |= 1;
10854 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
10857 case VEC_DELETE_EXPR:
10858 TYPE_GETS_DELETE (class_type) |= 2;
10865 /* [basic.std.dynamic.allocation]/1:
10867 A program is ill-formed if an allocation function is declared
10868 in a namespace scope other than global scope or declared static
10871 The same also holds true for deallocation functions. */
10872 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
10873 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10875 if (DECL_NAMESPACE_SCOPE_P (decl))
10877 if (CP_DECL_CONTEXT (decl) != global_namespace)
10879 error ("%qD may not be declared within a namespace", decl);
10882 else if (!TREE_PUBLIC (decl))
10884 error ("%qD may not be declared as static", decl);
10890 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
10892 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
10893 DECL_IS_OPERATOR_NEW (decl) = 1;
10895 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10896 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
10899 /* An operator function must either be a non-static member function
10900 or have at least one parameter of a class, a reference to a class,
10901 an enumeration, or a reference to an enumeration. 13.4.0.6 */
10902 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
10904 if (operator_code == TYPE_EXPR
10905 || operator_code == CALL_EXPR
10906 || operator_code == COMPONENT_REF
10907 || operator_code == ARRAY_REF
10908 || operator_code == NOP_EXPR)
10910 error ("%qD must be a nonstatic member function", decl);
10917 if (DECL_STATIC_FUNCTION_P (decl))
10919 error ("%qD must be either a non-static member "
10920 "function or a non-member function", decl);
10924 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
10926 tree arg = non_reference (TREE_VALUE (p));
10927 if (arg == error_mark_node)
10930 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
10931 because these checks are performed even on
10932 template functions. */
10933 if (MAYBE_CLASS_TYPE_P (arg)
10934 || TREE_CODE (arg) == ENUMERAL_TYPE)
10938 if (!p || p == void_list_node)
10941 error ("%qD must have an argument of class or "
10942 "enumerated type", decl);
10948 /* There are no restrictions on the arguments to an overloaded
10950 if (operator_code == CALL_EXPR)
10953 /* Warn about conversion operators that will never be used. */
10954 if (IDENTIFIER_TYPENAME_P (name)
10955 && ! DECL_TEMPLATE_INFO (decl)
10957 /* Warn only declaring the function; there is no need to
10958 warn again about out-of-class definitions. */
10959 && class_type == current_class_type)
10961 tree t = TREE_TYPE (name);
10962 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
10965 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
10967 if (TREE_CODE (t) == VOID_TYPE)
10968 warning (OPT_Wconversion,
10970 ? G_("conversion to a reference to void "
10971 "will never use a type conversion operator")
10972 : G_("conversion to void "
10973 "will never use a type conversion operator"));
10974 else if (class_type)
10976 if (t == class_type)
10977 warning (OPT_Wconversion,
10979 ? G_("conversion to a reference to the same type "
10980 "will never use a type conversion operator")
10981 : G_("conversion to the same type "
10982 "will never use a type conversion operator"));
10983 /* Don't force t to be complete here. */
10984 else if (MAYBE_CLASS_TYPE_P (t)
10985 && COMPLETE_TYPE_P (t)
10986 && DERIVED_FROM_P (t, class_type))
10987 warning (OPT_Wconversion,
10989 ? G_("conversion to a reference to a base class "
10990 "will never use a type conversion operator")
10991 : G_("conversion to a base class "
10992 "will never use a type conversion operator"));
10997 if (operator_code == COND_EXPR)
11000 error ("ISO C++ prohibits overloading operator ?:");
11003 else if (ellipsis_p)
11005 error ("%qD must not have variable number of arguments", decl);
11008 else if (ambi_op_p (operator_code))
11011 /* We pick the one-argument operator codes by default, so
11012 we don't have to change anything. */
11014 else if (arity == 2)
11016 /* If we thought this was a unary operator, we now know
11017 it to be a binary operator. */
11018 switch (operator_code)
11021 operator_code = MULT_EXPR;
11025 operator_code = BIT_AND_EXPR;
11028 case UNARY_PLUS_EXPR:
11029 operator_code = PLUS_EXPR;
11033 operator_code = MINUS_EXPR;
11036 case PREINCREMENT_EXPR:
11037 operator_code = POSTINCREMENT_EXPR;
11040 case PREDECREMENT_EXPR:
11041 operator_code = POSTDECREMENT_EXPR;
11045 gcc_unreachable ();
11048 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
11050 if ((operator_code == POSTINCREMENT_EXPR
11051 || operator_code == POSTDECREMENT_EXPR)
11052 && ! processing_template_decl
11053 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
11056 error ("postfix %qD must take %<int%> as its argument",
11059 error ("postfix %qD must take %<int%> as its second "
11067 error ("%qD must take either zero or one argument", decl);
11069 error ("%qD must take either one or two arguments", decl);
11073 /* More Effective C++ rule 6. */
11075 && (operator_code == POSTINCREMENT_EXPR
11076 || operator_code == POSTDECREMENT_EXPR
11077 || operator_code == PREINCREMENT_EXPR
11078 || operator_code == PREDECREMENT_EXPR))
11080 tree arg = TREE_VALUE (argtypes);
11081 tree ret = TREE_TYPE (TREE_TYPE (decl));
11082 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
11083 arg = TREE_TYPE (arg);
11084 arg = TYPE_MAIN_VARIANT (arg);
11085 if (operator_code == PREINCREMENT_EXPR
11086 || operator_code == PREDECREMENT_EXPR)
11088 if (TREE_CODE (ret) != REFERENCE_TYPE
11089 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
11091 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
11092 build_reference_type (arg));
11096 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
11097 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
11101 else if (unary_op_p (operator_code))
11106 error ("%qD must take %<void%>", decl);
11108 error ("%qD must take exactly one argument", decl);
11112 else /* if (binary_op_p (operator_code)) */
11117 error ("%qD must take exactly one argument", decl);
11119 error ("%qD must take exactly two arguments", decl);
11123 /* More Effective C++ rule 7. */
11125 && (operator_code == TRUTH_ANDIF_EXPR
11126 || operator_code == TRUTH_ORIF_EXPR
11127 || operator_code == COMPOUND_EXPR))
11128 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
11132 /* Effective C++ rule 23. */
11135 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
11136 && (operator_code == PLUS_EXPR
11137 || operator_code == MINUS_EXPR
11138 || operator_code == TRUNC_DIV_EXPR
11139 || operator_code == MULT_EXPR
11140 || operator_code == TRUNC_MOD_EXPR)
11141 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
11142 warning (OPT_Weffc__, "%qD should return by value", decl);
11144 /* [over.oper]/8 */
11145 for (; argtypes && argtypes != void_list_node;
11146 argtypes = TREE_CHAIN (argtypes))
11147 if (TREE_PURPOSE (argtypes))
11149 TREE_PURPOSE (argtypes) = NULL_TREE;
11150 if (operator_code == POSTINCREMENT_EXPR
11151 || operator_code == POSTDECREMENT_EXPR)
11153 pedwarn (input_location, OPT_pedantic, "%qD cannot have default arguments",
11158 error ("%qD cannot have default arguments", decl);
11166 /* Return a string giving the keyword associate with CODE. */
11168 static const char *
11169 tag_name (enum tag_types code)
11181 case typename_type:
11184 gcc_unreachable ();
11188 /* Name lookup in an elaborated-type-specifier (after the keyword
11189 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
11190 elaborated-type-specifier is invalid, issue a diagnostic and return
11191 error_mark_node; otherwise, return the *_TYPE to which it referred.
11192 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
11195 check_elaborated_type_specifier (enum tag_types tag_code,
11197 bool allow_template_p)
11203 struct S { struct S *p; };
11205 name lookup will find the TYPE_DECL for the implicit "S::S"
11206 typedef. Adjust for that here. */
11207 if (DECL_SELF_REFERENCE_P (decl))
11208 decl = TYPE_NAME (TREE_TYPE (decl));
11210 type = TREE_TYPE (decl);
11212 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
11213 is false for this case as well. */
11214 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
11216 error ("using template type parameter %qT after %qs",
11217 type, tag_name (tag_code));
11218 return error_mark_node;
11222 If the identifier resolves to a typedef-name or a template
11223 type-parameter, the elaborated-type-specifier is ill-formed.
11225 In other words, the only legitimate declaration to use in the
11226 elaborated type specifier is the implicit typedef created when
11227 the type is declared. */
11228 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
11229 && !DECL_SELF_REFERENCE_P (decl)
11230 && tag_code != typename_type)
11232 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
11233 error ("%q+D has a previous declaration here", decl);
11234 return error_mark_node;
11236 else if (TREE_CODE (type) != RECORD_TYPE
11237 && TREE_CODE (type) != UNION_TYPE
11238 && tag_code != enum_type
11239 && tag_code != typename_type)
11241 error ("%qT referred to as %qs", type, tag_name (tag_code));
11242 error ("%q+T has a previous declaration here", type);
11243 return error_mark_node;
11245 else if (TREE_CODE (type) != ENUMERAL_TYPE
11246 && tag_code == enum_type)
11248 error ("%qT referred to as enum", type);
11249 error ("%q+T has a previous declaration here", type);
11250 return error_mark_node;
11252 else if (!allow_template_p
11253 && TREE_CODE (type) == RECORD_TYPE
11254 && CLASSTYPE_IS_TEMPLATE (type))
11256 /* If a class template appears as elaborated type specifier
11257 without a template header such as:
11259 template <class T> class C {};
11260 void f(class C); // No template header here
11262 then the required template argument is missing. */
11263 error ("template argument required for %<%s %T%>",
11264 tag_name (tag_code),
11265 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
11266 return error_mark_node;
11272 /* Lookup NAME in elaborate type specifier in scope according to
11273 SCOPE and issue diagnostics if necessary.
11274 Return *_TYPE node upon success, NULL_TREE when the NAME is not
11275 found, and ERROR_MARK_NODE for type error. */
11278 lookup_and_check_tag (enum tag_types tag_code, tree name,
11279 tag_scope scope, bool template_header_p)
11283 if (scope == ts_global)
11285 /* First try ordinary name lookup, ignoring hidden class name
11286 injected via friend declaration. */
11287 decl = lookup_name_prefer_type (name, 2);
11288 /* If that fails, the name will be placed in the smallest
11289 non-class, non-function-prototype scope according to 3.3.1/5.
11290 We may already have a hidden name declared as friend in this
11291 scope. So lookup again but not ignoring hidden names.
11292 If we find one, that name will be made visible rather than
11293 creating a new tag. */
11295 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
11298 decl = lookup_type_scope (name, scope);
11300 if (decl && DECL_CLASS_TEMPLATE_P (decl))
11301 decl = DECL_TEMPLATE_RESULT (decl);
11303 if (decl && TREE_CODE (decl) == TYPE_DECL)
11305 /* Look for invalid nested type:
11309 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
11311 error ("%qD has the same name as the class in which it is "
11314 return error_mark_node;
11317 /* Two cases we need to consider when deciding if a class
11318 template is allowed as an elaborated type specifier:
11319 1. It is a self reference to its own class.
11320 2. It comes with a template header.
11324 template <class T> class C {
11325 class C *c1; // DECL_SELF_REFERENCE_P is true
11328 template <class U> class C; // template_header_p is true
11329 template <class T> class C<T>::D {
11330 class C *c2; // DECL_SELF_REFERENCE_P is true
11333 t = check_elaborated_type_specifier (tag_code,
11336 | DECL_SELF_REFERENCE_P (decl));
11339 else if (decl && TREE_CODE (decl) == TREE_LIST)
11341 error ("reference to %qD is ambiguous", name);
11342 print_candidates (decl);
11343 return error_mark_node;
11349 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
11350 Define the tag as a forward-reference if it is not defined.
11352 If a declaration is given, process it here, and report an error if
11353 multiple declarations are not identical.
11355 SCOPE is TS_CURRENT when this is also a definition. Only look in
11356 the current frame for the name (since C++ allows new names in any
11357 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
11358 declaration. Only look beginning from the current scope outward up
11359 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
11361 TEMPLATE_HEADER_P is true when this declaration is preceded by
11362 a set of template parameters. */
11365 xref_tag_1 (enum tag_types tag_code, tree name,
11366 tag_scope scope, bool template_header_p)
11368 enum tree_code code;
11370 tree context = NULL_TREE;
11372 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
11378 code = RECORD_TYPE;
11384 code = ENUMERAL_TYPE;
11387 gcc_unreachable ();
11390 /* In case of anonymous name, xref_tag is only called to
11391 make type node and push name. Name lookup is not required. */
11392 if (ANON_AGGRNAME_P (name))
11395 t = lookup_and_check_tag (tag_code, name,
11396 scope, template_header_p);
11398 if (t == error_mark_node)
11399 return error_mark_node;
11401 if (scope != ts_current && t && current_class_type
11402 && template_class_depth (current_class_type)
11403 && template_header_p)
11405 /* Since SCOPE is not TS_CURRENT, we are not looking at a
11406 definition of this tag. Since, in addition, we are currently
11407 processing a (member) template declaration of a template
11408 class, we must be very careful; consider:
11415 { template <class V>
11416 friend struct S1; };
11418 Here, the S2::S1 declaration should not be confused with the
11419 outer declaration. In particular, the inner version should
11420 have a template parameter of level 2, not level 1. This
11421 would be particularly important if the member declaration
11424 template <class V = U> friend struct S1;
11426 say, when we should tsubst into `U' when instantiating
11427 S2. On the other hand, when presented with:
11437 we must find the inner binding eventually. We
11438 accomplish this by making sure that the new type we
11439 create to represent this declaration has the right
11441 context = TYPE_CONTEXT (t);
11447 /* If no such tag is yet defined, create a forward-reference node
11448 and record it as the "definition".
11449 When a real declaration of this type is found,
11450 the forward-reference will be altered into a real type. */
11451 if (code == ENUMERAL_TYPE)
11453 error ("use of enum %q#D without previous declaration", name);
11454 return error_mark_node;
11458 t = make_class_type (code);
11459 TYPE_CONTEXT (t) = context;
11460 t = pushtag (name, t, scope);
11465 if (template_header_p && MAYBE_CLASS_TYPE_P (t))
11467 if (!redeclare_class_template (t, current_template_parms))
11468 return error_mark_node;
11470 else if (!processing_template_decl
11471 && CLASS_TYPE_P (t)
11472 && CLASSTYPE_IS_TEMPLATE (t))
11474 error ("redeclaration of %qT as a non-template", t);
11475 error ("previous declaration %q+D", t);
11476 return error_mark_node;
11479 /* Make injected friend class visible. */
11480 if (scope != ts_within_enclosing_non_class
11481 && hidden_name_p (TYPE_NAME (t)))
11483 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
11484 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
11486 if (TYPE_TEMPLATE_INFO (t))
11488 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
11489 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
11497 /* Wrapper for xref_tag_1. */
11500 xref_tag (enum tag_types tag_code, tree name,
11501 tag_scope scope, bool template_header_p)
11504 timevar_start (TV_NAME_LOOKUP);
11505 ret = xref_tag_1 (tag_code, name, scope, template_header_p);
11506 timevar_stop (TV_NAME_LOOKUP);
11512 xref_tag_from_type (tree old, tree id, tag_scope scope)
11514 enum tag_types tag_kind;
11516 if (TREE_CODE (old) == RECORD_TYPE)
11517 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
11519 tag_kind = union_type;
11521 if (id == NULL_TREE)
11522 id = TYPE_IDENTIFIER (old);
11524 return xref_tag (tag_kind, id, scope, false);
11527 /* Create the binfo hierarchy for REF with (possibly NULL) base list
11528 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
11529 access_* node, and the TREE_VALUE is the type of the base-class.
11530 Non-NULL TREE_TYPE indicates virtual inheritance.
11532 Returns true if the binfo hierarchy was successfully created,
11533 false if an error was detected. */
11536 xref_basetypes (tree ref, tree base_list)
11539 tree binfo, base_binfo;
11540 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
11541 unsigned max_bases = 0; /* Maximum direct bases. */
11543 tree default_access;
11544 tree igo_prev; /* Track Inheritance Graph Order. */
11546 if (ref == error_mark_node)
11549 /* The base of a derived class is private by default, all others are
11551 default_access = (TREE_CODE (ref) == RECORD_TYPE
11552 && CLASSTYPE_DECLARED_CLASS (ref)
11553 ? access_private_node : access_public_node);
11555 /* First, make sure that any templates in base-classes are
11556 instantiated. This ensures that if we call ourselves recursively
11557 we do not get confused about which classes are marked and which
11559 basep = &base_list;
11562 tree basetype = TREE_VALUE (*basep);
11564 if (!(processing_template_decl && uses_template_parms (basetype))
11565 && !complete_type_or_else (basetype, NULL))
11566 /* An incomplete type. Remove it from the list. */
11567 *basep = TREE_CHAIN (*basep);
11571 if (TREE_TYPE (*basep))
11573 if (CLASS_TYPE_P (basetype))
11574 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
11575 basep = &TREE_CHAIN (*basep);
11579 TYPE_MARKED_P (ref) = 1;
11581 /* The binfo slot should be empty, unless this is an (ill-formed)
11583 if (TYPE_BINFO (ref) && !TYPE_SIZE (ref))
11585 error ("redefinition of %q#T", ref);
11589 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
11591 binfo = make_tree_binfo (max_bases);
11593 TYPE_BINFO (ref) = binfo;
11594 BINFO_OFFSET (binfo) = size_zero_node;
11595 BINFO_TYPE (binfo) = ref;
11597 /* Apply base-class info set up to the variants of this type. */
11598 fixup_type_variants (ref);
11602 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
11603 /* An aggregate cannot have baseclasses. */
11604 CLASSTYPE_NON_AGGREGATE (ref) = 1;
11606 if (TREE_CODE (ref) == UNION_TYPE)
11608 error ("derived union %qT invalid", ref);
11615 if (TYPE_FOR_JAVA (ref))
11617 error ("Java class %qT cannot have multiple bases", ref);
11624 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
11626 if (TYPE_FOR_JAVA (ref))
11628 error ("Java class %qT cannot have virtual bases", ref);
11633 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
11635 tree access = TREE_PURPOSE (base_list);
11636 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
11637 tree basetype = TREE_VALUE (base_list);
11639 if (access == access_default_node)
11640 access = default_access;
11642 if (PACK_EXPANSION_P (basetype))
11643 basetype = PACK_EXPANSION_PATTERN (basetype);
11644 if (TREE_CODE (basetype) == TYPE_DECL)
11645 basetype = TREE_TYPE (basetype);
11646 if (!MAYBE_CLASS_TYPE_P (basetype) || TREE_CODE (basetype) == UNION_TYPE)
11648 error ("base type %qT fails to be a struct or class type",
11653 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
11654 TYPE_FOR_JAVA (ref) = 1;
11656 base_binfo = NULL_TREE;
11657 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
11659 base_binfo = TYPE_BINFO (basetype);
11660 /* The original basetype could have been a typedef'd type. */
11661 basetype = BINFO_TYPE (base_binfo);
11663 /* Inherit flags from the base. */
11664 TYPE_HAS_NEW_OPERATOR (ref)
11665 |= TYPE_HAS_NEW_OPERATOR (basetype);
11666 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
11667 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
11668 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
11669 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
11670 CLASSTYPE_DIAMOND_SHAPED_P (ref)
11671 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
11672 CLASSTYPE_REPEATED_BASE_P (ref)
11673 |= CLASSTYPE_REPEATED_BASE_P (basetype);
11676 /* We must do this test after we've seen through a typedef
11678 if (TYPE_MARKED_P (basetype))
11680 if (basetype == ref)
11681 error ("recursive type %qT undefined", basetype);
11683 error ("duplicate base type %qT invalid", basetype);
11687 if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
11688 /* Regenerate the pack expansion for the bases. */
11689 basetype = make_pack_expansion (basetype);
11691 TYPE_MARKED_P (basetype) = 1;
11693 base_binfo = copy_binfo (base_binfo, basetype, ref,
11694 &igo_prev, via_virtual);
11695 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
11696 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
11698 BINFO_BASE_APPEND (binfo, base_binfo);
11699 BINFO_BASE_ACCESS_APPEND (binfo, access);
11702 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
11703 /* If we have space in the vbase vector, we must have shared at
11704 least one of them, and are therefore diamond shaped. */
11705 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
11707 /* Unmark all the types. */
11708 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
11709 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
11710 TYPE_MARKED_P (ref) = 0;
11712 /* Now see if we have a repeated base type. */
11713 if (!CLASSTYPE_REPEATED_BASE_P (ref))
11715 for (base_binfo = binfo; base_binfo;
11716 base_binfo = TREE_CHAIN (base_binfo))
11718 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
11720 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
11723 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
11725 for (base_binfo = binfo; base_binfo;
11726 base_binfo = TREE_CHAIN (base_binfo))
11727 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
11728 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
11737 /* Copies the enum-related properties from type SRC to type DST.
11738 Used with the underlying type of an enum and the enum itself. */
11740 copy_type_enum (tree dst, tree src)
11742 TYPE_MIN_VALUE (dst) = TYPE_MIN_VALUE (src);
11743 TYPE_MAX_VALUE (dst) = TYPE_MAX_VALUE (src);
11744 TYPE_SIZE (dst) = TYPE_SIZE (src);
11745 TYPE_SIZE_UNIT (dst) = TYPE_SIZE_UNIT (src);
11746 SET_TYPE_MODE (dst, TYPE_MODE (src));
11747 TYPE_PRECISION (dst) = TYPE_PRECISION (src);
11748 TYPE_ALIGN (dst) = TYPE_ALIGN (src);
11749 TYPE_USER_ALIGN (dst) = TYPE_USER_ALIGN (src);
11750 TYPE_UNSIGNED (dst) = TYPE_UNSIGNED (src);
11753 /* Begin compiling the definition of an enumeration type.
11756 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
11758 UNDERLYING_TYPE is the type that will be used as the storage for
11759 the enumeration type. This should be NULL_TREE if no storage type
11762 SCOPED_ENUM_P is true if this is a scoped enumeration type.
11764 if IS_NEW is not NULL, gets TRUE iff a new type is created.
11766 Returns the type object, as yet incomplete.
11767 Also records info about it so that build_enumerator
11768 may be used to declare the individual values as they are read. */
11771 start_enum (tree name, tree enumtype, tree underlying_type,
11772 bool scoped_enum_p, bool *is_new)
11774 tree prevtype = NULL_TREE;
11775 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
11779 /* [C++0x dcl.enum]p5:
11781 If not explicitly specified, the underlying type of a scoped
11782 enumeration type is int. */
11783 if (!underlying_type && scoped_enum_p)
11784 underlying_type = integer_type_node;
11786 if (underlying_type)
11787 underlying_type = cv_unqualified (underlying_type);
11789 /* If this is the real definition for a previous forward reference,
11790 fill in the contents in the same object that used to be the
11791 forward reference. */
11793 enumtype = lookup_and_check_tag (enum_type, name,
11794 /*tag_scope=*/ts_current,
11795 /*template_header_p=*/false);
11797 /* In case of a template_decl, the only check that should be deferred
11798 to instantiation time is the comparison of underlying types. */
11799 if (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE)
11801 if (scoped_enum_p != SCOPED_ENUM_P (enumtype))
11803 error_at (input_location, "scoped/unscoped mismatch "
11804 "in enum %q#T", enumtype);
11805 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
11806 "previous definition here");
11807 enumtype = error_mark_node;
11809 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype) != !! underlying_type)
11811 error_at (input_location, "underlying type mismatch "
11812 "in enum %q#T", enumtype);
11813 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
11814 "previous definition here");
11815 enumtype = error_mark_node;
11817 else if (underlying_type && ENUM_UNDERLYING_TYPE (enumtype)
11818 && !dependent_type_p (underlying_type)
11819 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype))
11820 && !same_type_p (underlying_type,
11821 ENUM_UNDERLYING_TYPE (enumtype)))
11823 error_at (input_location, "different underlying type "
11824 "in enum %q#T", enumtype);
11825 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
11826 "previous definition here");
11827 underlying_type = NULL_TREE;
11831 if (!enumtype || TREE_CODE (enumtype) != ENUMERAL_TYPE
11832 || processing_template_decl)
11834 /* In case of error, make a dummy enum to allow parsing to
11836 if (enumtype == error_mark_node)
11838 name = make_anon_name ();
11839 enumtype = NULL_TREE;
11842 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
11843 of an opaque enum, or an opaque enum of an already defined
11844 enumeration (C++0x only).
11845 In any other case, it'll be NULL_TREE. */
11851 prevtype = enumtype;
11852 enumtype = cxx_make_type (ENUMERAL_TYPE);
11853 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
11854 if (enumtype == error_mark_node)
11855 return error_mark_node;
11857 /* The enum is considered opaque until the opening '{' of the
11858 enumerator list. */
11859 SET_OPAQUE_ENUM_P (enumtype, true);
11860 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype) = !! underlying_type;
11863 SET_SCOPED_ENUM_P (enumtype, scoped_enum_p);
11865 if (underlying_type)
11867 if (CP_INTEGRAL_TYPE_P (underlying_type))
11869 copy_type_enum (enumtype, underlying_type);
11870 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
11872 else if (dependent_type_p (underlying_type))
11873 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
11875 error ("underlying type %<%T%> of %<%T%> must be an integral type",
11876 underlying_type, enumtype);
11879 /* If into a template class, the returned enum is always the first
11880 declaration (opaque or not) seen. This way all the references to
11881 this type will be to the same declaration. The following ones are used
11882 only to check for definition errors. */
11883 if (prevtype && processing_template_decl)
11889 /* After processing and defining all the values of an enumeration type,
11890 install their decls in the enumeration type.
11891 ENUMTYPE is the type object. */
11894 finish_enum_value_list (tree enumtype)
11897 tree underlying_type;
11900 tree minnode, maxnode;
11903 bool fixed_underlying_type_p
11904 = ENUM_UNDERLYING_TYPE (enumtype) != NULL_TREE;
11906 /* We built up the VALUES in reverse order. */
11907 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
11909 /* For an enum defined in a template, just set the type of the values;
11910 all further processing is postponed until the template is
11911 instantiated. We need to set the type so that tsubst of a CONST_DECL
11913 if (processing_template_decl)
11915 for (values = TYPE_VALUES (enumtype);
11917 values = TREE_CHAIN (values))
11918 TREE_TYPE (TREE_VALUE (values)) = enumtype;
11922 /* Determine the minimum and maximum values of the enumerators. */
11923 if (TYPE_VALUES (enumtype))
11925 minnode = maxnode = NULL_TREE;
11927 for (values = TYPE_VALUES (enumtype);
11929 values = TREE_CHAIN (values))
11931 decl = TREE_VALUE (values);
11933 /* [dcl.enum]: Following the closing brace of an enum-specifier,
11934 each enumerator has the type of its enumeration. Prior to the
11935 closing brace, the type of each enumerator is the type of its
11936 initializing value. */
11937 TREE_TYPE (decl) = enumtype;
11939 /* Update the minimum and maximum values, if appropriate. */
11940 value = DECL_INITIAL (decl);
11941 if (value == error_mark_node)
11942 value = integer_zero_node;
11943 /* Figure out what the minimum and maximum values of the
11944 enumerators are. */
11946 minnode = maxnode = value;
11947 else if (tree_int_cst_lt (maxnode, value))
11949 else if (tree_int_cst_lt (value, minnode))
11956 If the enumerator-list is empty, the underlying type is as if
11957 the enumeration had a single enumerator with value 0. */
11958 minnode = maxnode = integer_zero_node;
11960 if (!fixed_underlying_type_p)
11962 /* Compute the number of bits require to represent all values of the
11963 enumeration. We must do this before the type of MINNODE and
11964 MAXNODE are transformed, since tree_int_cst_min_precision relies
11965 on the TREE_TYPE of the value it is passed. */
11966 bool unsignedp = tree_int_cst_sgn (minnode) >= 0;
11967 int lowprec = tree_int_cst_min_precision (minnode, unsignedp);
11968 int highprec = tree_int_cst_min_precision (maxnode, unsignedp);
11969 int precision = MAX (lowprec, highprec);
11971 bool use_short_enum;
11973 /* Determine the underlying type of the enumeration.
11977 The underlying type of an enumeration is an integral type that
11978 can represent all the enumerator values defined in the
11979 enumeration. It is implementation-defined which integral type is
11980 used as the underlying type for an enumeration except that the
11981 underlying type shall not be larger than int unless the value of
11982 an enumerator cannot fit in an int or unsigned int.
11984 We use "int" or an "unsigned int" as the underlying type, even if
11985 a smaller integral type would work, unless the user has
11986 explicitly requested that we use the smallest possible type. The
11987 user can request that for all enumerations with a command line
11988 flag, or for just one enumeration with an attribute. */
11990 use_short_enum = flag_short_enums
11991 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
11993 for (itk = (use_short_enum ? itk_char : itk_int);
11997 underlying_type = integer_types[itk];
11998 if (underlying_type != NULL_TREE
11999 && TYPE_PRECISION (underlying_type) >= precision
12000 && TYPE_UNSIGNED (underlying_type) == unsignedp)
12003 if (itk == itk_none)
12007 IF no integral type can represent all the enumerator values, the
12008 enumeration is ill-formed. */
12009 error ("no integral type can represent all of the enumerator values "
12010 "for %qT", enumtype);
12011 precision = TYPE_PRECISION (long_long_integer_type_node);
12012 underlying_type = integer_types[itk_unsigned_long_long];
12017 The value of sizeof() applied to an enumeration type, an object
12018 of an enumeration type, or an enumerator, is the value of sizeof()
12019 applied to the underlying type. */
12020 copy_type_enum (enumtype, underlying_type);
12022 /* Compute the minimum and maximum values for the type.
12026 For an enumeration where emin is the smallest enumerator and emax
12027 is the largest, the values of the enumeration are the values of the
12028 underlying type in the range bmin to bmax, where bmin and bmax are,
12029 respectively, the smallest and largest values of the smallest bit-
12030 field that can store emin and emax. */
12032 /* The middle-end currently assumes that types with TYPE_PRECISION
12033 narrower than their underlying type are suitably zero or sign
12034 extended to fill their mode. Similarly, it assumes that the front
12035 end assures that a value of a particular type must be within
12036 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12038 We used to set these fields based on bmin and bmax, but that led
12039 to invalid assumptions like optimizing away bounds checking. So
12040 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12041 TYPE_MAX_VALUE to the values for the mode above and only restrict
12042 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12043 ENUM_UNDERLYING_TYPE (enumtype)
12044 = build_distinct_type_copy (underlying_type);
12045 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype)) = precision;
12046 set_min_and_max_values_for_integral_type
12047 (ENUM_UNDERLYING_TYPE (enumtype), precision, unsignedp);
12049 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12050 if (flag_strict_enums)
12051 set_min_and_max_values_for_integral_type (enumtype, precision,
12055 underlying_type = ENUM_UNDERLYING_TYPE (enumtype);
12057 /* Convert each of the enumerators to the type of the underlying
12058 type of the enumeration. */
12059 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
12061 location_t saved_location;
12063 decl = TREE_VALUE (values);
12064 saved_location = input_location;
12065 input_location = DECL_SOURCE_LOCATION (decl);
12066 if (fixed_underlying_type_p)
12067 /* If the enumeration type has a fixed underlying type, we
12068 already checked all of the enumerator values. */
12069 value = DECL_INITIAL (decl);
12071 value = perform_implicit_conversion (underlying_type,
12072 DECL_INITIAL (decl),
12073 tf_warning_or_error);
12074 input_location = saved_location;
12076 /* Do not clobber shared ints. */
12077 value = copy_node (value);
12079 TREE_TYPE (value) = enumtype;
12080 DECL_INITIAL (decl) = value;
12083 /* Fix up all variant types of this enum type. */
12084 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
12085 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
12087 /* Finish debugging output for this type. */
12088 rest_of_type_compilation (enumtype, namespace_bindings_p ());
12091 /* Finishes the enum type. This is called only the first time an
12092 enumeration is seen, be it opaque or odinary.
12093 ENUMTYPE is the type object. */
12096 finish_enum (tree enumtype)
12098 if (processing_template_decl)
12100 if (at_function_scope_p ())
12101 add_stmt (build_min (TAG_DEFN, enumtype));
12105 /* Here there should not be any variants of this type. */
12106 gcc_assert (enumtype == TYPE_MAIN_VARIANT (enumtype)
12107 && !TYPE_NEXT_VARIANT (enumtype));
12110 /* Build and install a CONST_DECL for an enumeration constant of the
12111 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
12112 LOC is the location of NAME.
12113 Assignment of sequential values by default is handled here. */
12116 build_enumerator (tree name, tree value, tree enumtype, location_t loc)
12122 /* If the VALUE was erroneous, pretend it wasn't there; that will
12123 result in the enum being assigned the next value in sequence. */
12124 if (value == error_mark_node)
12127 /* Remove no-op casts from the value. */
12129 STRIP_TYPE_NOPS (value);
12131 if (! processing_template_decl)
12133 /* Validate and default VALUE. */
12134 if (value != NULL_TREE)
12136 value = cxx_constant_value (value);
12138 if (TREE_CODE (value) == INTEGER_CST
12139 && INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value)))
12141 value = perform_integral_promotions (value);
12145 error ("enumerator value for %qD is not an integer constant", name);
12150 /* Default based on previous value. */
12151 if (value == NULL_TREE)
12153 if (TYPE_VALUES (enumtype))
12156 unsigned HOST_WIDE_INT lo;
12160 /* The next value is the previous value plus one.
12161 add_double doesn't know the type of the target expression,
12162 so we must check with int_fits_type_p as well. */
12163 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
12164 if (error_operand_p (prev_value))
12165 value = error_mark_node;
12168 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
12169 TREE_INT_CST_HIGH (prev_value),
12171 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
12173 |= !int_fits_type_p (value, TREE_TYPE (prev_value));
12177 error ("overflow in enumeration values at %qD", name);
12178 value = error_mark_node;
12183 value = integer_zero_node;
12186 /* Remove no-op casts from the value. */
12187 STRIP_TYPE_NOPS (value);
12189 /* If the underlying type of the enum is fixed, check whether
12190 the enumerator values fits in the underlying type. If it
12191 does not fit, the program is ill-formed [C++0x dcl.enum]. */
12192 if (ENUM_UNDERLYING_TYPE (enumtype)
12194 && TREE_CODE (value) == INTEGER_CST
12195 && !int_fits_type_p (value, ENUM_UNDERLYING_TYPE (enumtype)))
12197 error ("enumerator value %E is too large for underlying type %<%T%>",
12198 value, ENUM_UNDERLYING_TYPE (enumtype));
12200 /* Silently convert the value so that we can continue. */
12201 value = perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype),
12206 /* C++ associates enums with global, function, or class declarations. */
12207 context = current_scope ();
12209 /* Build the actual enumeration constant. Note that the enumeration
12210 constants have the underlying type of the enum (if it is fixed)
12211 or the type of their initializer (if the underlying type of the
12212 enum is not fixed):
12216 If the underlying type is fixed, the type of each enumerator
12217 prior to the closing brace is the underlying type; if the
12218 initializing value of an enumerator cannot be represented by
12219 the underlying type, the program is ill-formed. If the
12220 underlying type is not fixed, the type of each enumerator is
12221 the type of its initializing value.
12223 If the underlying type is not fixed, it will be computed by
12224 finish_enum and we will reset the type of this enumerator. Of
12225 course, if we're processing a template, there may be no value. */
12226 type = value ? TREE_TYPE (value) : NULL_TREE;
12228 if (context && context == current_class_type)
12229 /* This enum declaration is local to the class. We need the full
12230 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
12231 decl = build_lang_decl_loc (loc, CONST_DECL, name, type);
12233 /* It's a global enum, or it's local to a function. (Note local to
12234 a function could mean local to a class method. */
12235 decl = build_decl (loc, CONST_DECL, name, type);
12237 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
12238 TREE_CONSTANT (decl) = 1;
12239 TREE_READONLY (decl) = 1;
12240 DECL_INITIAL (decl) = value;
12242 if (context && context == current_class_type && !SCOPED_ENUM_P (enumtype))
12243 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
12244 on the TYPE_FIELDS list for `S'. (That's so that you can say
12245 things like `S::i' later.) */
12246 finish_member_declaration (decl);
12250 /* Add this enumeration constant to the list for this type. */
12251 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
12254 /* Look for an enumerator with the given NAME within the enumeration
12255 type ENUMTYPE. This routine is used primarily for qualified name
12256 lookup into an enumerator in C++0x, e.g.,
12258 enum class Color { Red, Green, Blue };
12260 Color color = Color::Red;
12262 Returns the value corresponding to the enumerator, or
12263 NULL_TREE if no such enumerator was found. */
12265 lookup_enumerator (tree enumtype, tree name)
12268 gcc_assert (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE);
12270 e = purpose_member (name, TYPE_VALUES (enumtype));
12271 return e? TREE_VALUE (e) : NULL_TREE;
12275 /* We're defining DECL. Make sure that its type is OK. */
12278 check_function_type (tree decl, tree current_function_parms)
12280 tree fntype = TREE_TYPE (decl);
12281 tree return_type = complete_type (TREE_TYPE (fntype));
12283 /* In a function definition, arg types must be complete. */
12284 require_complete_types_for_parms (current_function_parms);
12286 if (dependent_type_p (return_type))
12288 if (!COMPLETE_OR_VOID_TYPE_P (return_type)
12289 || (TYPE_FOR_JAVA (return_type) && MAYBE_CLASS_TYPE_P (return_type)))
12291 tree args = TYPE_ARG_TYPES (fntype);
12293 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
12294 error ("return type %q#T is incomplete", return_type);
12296 error ("return type has Java class type %q#T", return_type);
12298 /* Make it return void instead. */
12299 if (TREE_CODE (fntype) == METHOD_TYPE)
12300 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
12302 TREE_CHAIN (args));
12304 fntype = build_function_type (void_type_node, args);
12306 = build_exception_variant (fntype,
12307 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
12308 fntype = (cp_build_type_attribute_variant
12309 (fntype, TYPE_ATTRIBUTES (TREE_TYPE (decl))));
12310 TREE_TYPE (decl) = fntype;
12313 abstract_virtuals_error (decl, TREE_TYPE (fntype));
12316 /* Create the FUNCTION_DECL for a function definition.
12317 DECLSPECS and DECLARATOR are the parts of the declaration;
12318 they describe the function's name and the type it returns,
12319 but twisted together in a fashion that parallels the syntax of C.
12321 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
12322 DECLARATOR is really the DECL for the function we are about to
12323 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
12324 indicating that the function is an inline defined in-class.
12326 This function creates a binding context for the function body
12327 as well as setting up the FUNCTION_DECL in current_function_decl.
12329 For C++, we must first check whether that datum makes any sense.
12330 For example, "class A local_a(1,2);" means that variable local_a
12331 is an aggregate of type A, which should have a constructor
12332 applied to it with the argument list [1, 2].
12334 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
12335 or may be a BLOCK if the function has been defined previously
12336 in this translation unit. On exit, DECL_INITIAL (decl1) will be
12337 error_mark_node if the function has never been defined, or
12338 a BLOCK if the function has been defined somewhere. */
12341 start_preparsed_function (tree decl1, tree attrs, int flags)
12343 tree ctype = NULL_TREE;
12346 int doing_friend = 0;
12347 struct cp_binding_level *bl;
12348 tree current_function_parms;
12349 struct c_fileinfo *finfo
12350 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
12351 bool honor_interface;
12353 /* Sanity check. */
12354 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
12355 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
12357 fntype = TREE_TYPE (decl1);
12358 if (TREE_CODE (fntype) == METHOD_TYPE)
12359 ctype = TYPE_METHOD_BASETYPE (fntype);
12361 /* ISO C++ 11.4/5. A friend function defined in a class is in
12362 the (lexical) scope of the class in which it is defined. */
12363 if (!ctype && DECL_FRIEND_P (decl1))
12365 ctype = DECL_FRIEND_CONTEXT (decl1);
12367 /* CTYPE could be null here if we're dealing with a template;
12368 for example, `inline friend float foo()' inside a template
12369 will have no CTYPE set. */
12370 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
12376 if (DECL_DECLARED_INLINE_P (decl1)
12377 && lookup_attribute ("noinline", attrs))
12378 warning (0, "inline function %q+D given attribute noinline", decl1);
12380 /* Handle gnu_inline attribute. */
12381 if (GNU_INLINE_P (decl1))
12383 DECL_EXTERNAL (decl1) = 1;
12384 DECL_NOT_REALLY_EXTERN (decl1) = 0;
12385 DECL_INTERFACE_KNOWN (decl1) = 1;
12386 DECL_DISREGARD_INLINE_LIMITS (decl1) = 1;
12389 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
12390 /* This is a constructor, we must ensure that any default args
12391 introduced by this definition are propagated to the clones
12392 now. The clones are used directly in overload resolution. */
12393 adjust_clone_args (decl1);
12395 /* Sometimes we don't notice that a function is a static member, and
12396 build a METHOD_TYPE for it. Fix that up now. */
12397 gcc_assert (!(ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
12398 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE));
12400 /* Set up current_class_type, and enter the scope of the class, if
12403 push_nested_class (ctype);
12404 else if (DECL_STATIC_FUNCTION_P (decl1))
12405 push_nested_class (DECL_CONTEXT (decl1));
12407 /* Now that we have entered the scope of the class, we must restore
12408 the bindings for any template parameters surrounding DECL1, if it
12409 is an inline member template. (Order is important; consider the
12410 case where a template parameter has the same name as a field of
12411 the class.) It is not until after this point that
12412 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
12413 if (flags & SF_INCLASS_INLINE)
12414 maybe_begin_member_template_processing (decl1);
12416 /* Effective C++ rule 15. */
12418 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
12419 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
12420 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
12422 /* Make the init_value nonzero so pushdecl knows this is not tentative.
12423 error_mark_node is replaced below (in poplevel) with the BLOCK. */
12424 if (!DECL_INITIAL (decl1))
12425 DECL_INITIAL (decl1) = error_mark_node;
12427 /* This function exists in static storage.
12428 (This does not mean `static' in the C sense!) */
12429 TREE_STATIC (decl1) = 1;
12431 /* We must call push_template_decl after current_class_type is set
12432 up. (If we are processing inline definitions after exiting a
12433 class scope, current_class_type will be NULL_TREE until set above
12434 by push_nested_class.) */
12435 if (processing_template_decl)
12437 /* FIXME: Handle error_mark_node more gracefully. */
12438 tree newdecl1 = push_template_decl (decl1);
12439 if (newdecl1 != error_mark_node)
12443 /* We are now in the scope of the function being defined. */
12444 current_function_decl = decl1;
12446 /* Save the parm names or decls from this function's declarator
12447 where store_parm_decls will find them. */
12448 current_function_parms = DECL_ARGUMENTS (decl1);
12450 /* Make sure the parameter and return types are reasonable. When
12451 you declare a function, these types can be incomplete, but they
12452 must be complete when you define the function. */
12453 check_function_type (decl1, current_function_parms);
12455 /* Build the return declaration for the function. */
12456 restype = TREE_TYPE (fntype);
12457 if (DECL_RESULT (decl1) == NULL_TREE)
12461 resdecl = build_decl (input_location, RESULT_DECL, 0, restype);
12462 DECL_ARTIFICIAL (resdecl) = 1;
12463 DECL_IGNORED_P (resdecl) = 1;
12464 DECL_RESULT (decl1) = resdecl;
12466 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
12469 /* Let the user know we're compiling this function. */
12470 announce_function (decl1);
12472 /* Record the decl so that the function name is defined.
12473 If we already have a decl for this name, and it is a FUNCTION_DECL,
12474 use the old decl. */
12475 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
12477 /* A specialization is not used to guide overload resolution. */
12478 if (!DECL_FUNCTION_MEMBER_P (decl1)
12479 && !(DECL_USE_TEMPLATE (decl1) &&
12480 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
12482 tree olddecl = pushdecl (decl1);
12484 if (olddecl == error_mark_node)
12485 /* If something went wrong when registering the declaration,
12486 use DECL1; we have to have a FUNCTION_DECL to use when
12487 parsing the body of the function. */
12491 /* Otherwise, OLDDECL is either a previous declaration
12492 of the same function or DECL1 itself. */
12494 if (warn_missing_declarations
12495 && olddecl == decl1
12496 && !DECL_MAIN_P (decl1)
12497 && TREE_PUBLIC (decl1)
12498 && !DECL_DECLARED_INLINE_P (decl1))
12502 /* Check whether DECL1 is in an anonymous
12504 for (context = DECL_CONTEXT (decl1);
12506 context = DECL_CONTEXT (context))
12508 if (TREE_CODE (context) == NAMESPACE_DECL
12509 && DECL_NAME (context) == NULL_TREE)
12513 if (context == NULL)
12514 warning (OPT_Wmissing_declarations,
12515 "no previous declaration for %q+D", decl1);
12523 /* We need to set the DECL_CONTEXT. */
12524 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
12525 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
12527 fntype = TREE_TYPE (decl1);
12529 /* If #pragma weak applies, mark the decl appropriately now.
12530 The pragma only applies to global functions. Because
12531 determining whether or not the #pragma applies involves
12532 computing the mangled name for the declaration, we cannot
12533 apply the pragma until after we have merged this declaration
12534 with any previous declarations; if the original declaration
12535 has a linkage specification, that specification applies to
12536 the definition as well, and may affect the mangled name. */
12537 if (DECL_FILE_SCOPE_P (decl1))
12538 maybe_apply_pragma_weak (decl1);
12541 /* constexpr functions must have literal argument types and
12542 literal return type. */
12543 validate_constexpr_fundecl (decl1);
12545 /* Reset this in case the call to pushdecl changed it. */
12546 current_function_decl = decl1;
12548 gcc_assert (DECL_INITIAL (decl1));
12550 /* This function may already have been parsed, in which case just
12551 return; our caller will skip over the body without parsing. */
12552 if (DECL_INITIAL (decl1) != error_mark_node)
12555 /* Initialize RTL machinery. We cannot do this until
12556 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
12557 even when processing a template; this is how we get
12558 CFUN set up, and our per-function variables initialized.
12559 FIXME factor out the non-RTL stuff. */
12560 bl = current_binding_level;
12561 allocate_struct_function (decl1, processing_template_decl);
12563 /* Initialize the language data structures. Whenever we start
12564 a new function, we destroy temporaries in the usual way. */
12565 cfun->language = ggc_alloc_cleared_language_function ();
12566 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
12567 current_binding_level = bl;
12569 /* Start the statement-tree, start the tree now. */
12570 DECL_SAVED_TREE (decl1) = push_stmt_list ();
12572 /* If we are (erroneously) defining a function that we have already
12573 defined before, wipe out what we knew before. */
12574 if (!DECL_PENDING_INLINE_P (decl1))
12575 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
12577 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
12579 /* We know that this was set up by `grokclassfn'. We do not
12580 wait until `store_parm_decls', since evil parse errors may
12581 never get us to that point. Here we keep the consistency
12582 between `current_class_type' and `current_class_ptr'. */
12583 tree t = DECL_ARGUMENTS (decl1);
12585 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
12586 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
12588 cp_function_chain->x_current_class_ref
12589 = cp_build_indirect_ref (t, RO_NULL, tf_warning_or_error);
12590 cp_function_chain->x_current_class_ptr = t;
12592 /* Constructors and destructors need to know whether they're "in
12593 charge" of initializing virtual base classes. */
12594 t = DECL_CHAIN (t);
12595 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
12597 current_in_charge_parm = t;
12598 t = DECL_CHAIN (t);
12600 if (DECL_HAS_VTT_PARM_P (decl1))
12602 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
12603 current_vtt_parm = t;
12607 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
12608 /* Implicitly-defined methods (like the
12609 destructor for a class in which no destructor
12610 is explicitly declared) must not be defined
12611 until their definition is needed. So, we
12612 ignore interface specifications for
12613 compiler-generated functions. */
12614 && !DECL_ARTIFICIAL (decl1));
12616 if (DECL_INTERFACE_KNOWN (decl1))
12618 tree ctx = decl_function_context (decl1);
12620 if (DECL_NOT_REALLY_EXTERN (decl1))
12621 DECL_EXTERNAL (decl1) = 0;
12623 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
12624 && TREE_PUBLIC (ctx))
12625 /* This is a function in a local class in an extern inline
12627 comdat_linkage (decl1);
12629 /* If this function belongs to an interface, it is public.
12630 If it belongs to someone else's interface, it is also external.
12631 This only affects inlines and template instantiations. */
12632 else if (!finfo->interface_unknown && honor_interface)
12634 if (DECL_DECLARED_INLINE_P (decl1)
12635 || DECL_TEMPLATE_INSTANTIATION (decl1)
12636 || processing_template_decl)
12638 DECL_EXTERNAL (decl1)
12639 = (finfo->interface_only
12640 || (DECL_DECLARED_INLINE_P (decl1)
12641 && ! flag_implement_inlines
12642 && !DECL_VINDEX (decl1)));
12644 /* For WIN32 we also want to put these in linkonce sections. */
12645 maybe_make_one_only (decl1);
12648 DECL_EXTERNAL (decl1) = 0;
12649 DECL_INTERFACE_KNOWN (decl1) = 1;
12650 /* If this function is in an interface implemented in this file,
12651 make sure that the back end knows to emit this function
12653 if (!DECL_EXTERNAL (decl1))
12654 mark_needed (decl1);
12656 else if (finfo->interface_unknown && finfo->interface_only
12657 && honor_interface)
12659 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
12660 interface, we will have both finfo->interface_unknown and
12661 finfo->interface_only set. In that case, we don't want to
12662 use the normal heuristics because someone will supply a
12663 #pragma implementation elsewhere, and deducing it here would
12664 produce a conflict. */
12665 comdat_linkage (decl1);
12666 DECL_EXTERNAL (decl1) = 0;
12667 DECL_INTERFACE_KNOWN (decl1) = 1;
12668 DECL_DEFER_OUTPUT (decl1) = 1;
12672 /* This is a definition, not a reference.
12673 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
12674 if (!GNU_INLINE_P (decl1))
12675 DECL_EXTERNAL (decl1) = 0;
12677 if ((DECL_DECLARED_INLINE_P (decl1)
12678 || DECL_TEMPLATE_INSTANTIATION (decl1))
12679 && ! DECL_INTERFACE_KNOWN (decl1))
12680 DECL_DEFER_OUTPUT (decl1) = 1;
12682 DECL_INTERFACE_KNOWN (decl1) = 1;
12685 /* Determine the ELF visibility attribute for the function. We must not
12686 do this before calling "pushdecl", as we must allow "duplicate_decls"
12687 to merge any attributes appropriately. We also need to wait until
12689 if (!DECL_CLONED_FUNCTION_P (decl1))
12690 determine_visibility (decl1);
12692 begin_scope (sk_function_parms, decl1);
12696 if (DECL_DESTRUCTOR_P (decl1)
12697 || (DECL_CONSTRUCTOR_P (decl1)
12698 && targetm.cxx.cdtor_returns_this ()))
12700 cdtor_label = build_decl (input_location,
12701 LABEL_DECL, NULL_TREE, NULL_TREE);
12702 DECL_CONTEXT (cdtor_label) = current_function_decl;
12705 start_fname_decls ();
12707 store_parm_decls (current_function_parms);
12711 /* Like start_preparsed_function, except that instead of a
12712 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
12714 Returns 1 on success. If the DECLARATOR is not suitable for a function
12715 (it defines a datum instead), we return 0, which tells
12716 yyparse to report a parse error. */
12719 start_function (cp_decl_specifier_seq *declspecs,
12720 const cp_declarator *declarator,
12725 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
12726 if (decl1 == error_mark_node)
12728 /* If the declarator is not suitable for a function definition,
12729 cause a syntax error. */
12730 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
12732 error ("invalid function declaration");
12736 if (DECL_MAIN_P (decl1))
12737 /* main must return int. grokfndecl should have corrected it
12738 (and issued a diagnostic) if the user got it wrong. */
12739 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
12740 integer_type_node));
12742 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
12747 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
12751 use_eh_spec_block (tree fn)
12753 return (flag_exceptions && flag_enforce_eh_specs
12754 && !processing_template_decl
12755 && !type_throw_all_p (TREE_TYPE (fn))
12756 /* We insert the EH_SPEC_BLOCK only in the original
12757 function; then, it is copied automatically to the
12759 && !DECL_CLONED_FUNCTION_P (fn)
12760 /* Implicitly-generated constructors and destructors have
12761 exception specifications. However, those specifications
12762 are the union of the possible exceptions specified by the
12763 constructors/destructors for bases and members, so no
12764 unallowed exception will ever reach this function. By
12765 not creating the EH_SPEC_BLOCK we save a little memory,
12766 and we avoid spurious warnings about unreachable
12768 && !DECL_DEFAULTED_FN (fn));
12771 /* Store the parameter declarations into the current function declaration.
12772 This is called after parsing the parameter declarations, before
12773 digesting the body of the function.
12775 Also install to binding contour return value identifier, if any. */
12778 store_parm_decls (tree current_function_parms)
12780 tree fndecl = current_function_decl;
12783 /* This is a chain of any other decls that came in among the parm
12784 declarations. If a parm is declared with enum {foo, bar} x;
12785 then CONST_DECLs for foo and bar are put here. */
12786 tree nonparms = NULL_TREE;
12788 if (current_function_parms)
12790 /* This case is when the function was defined with an ANSI prototype.
12791 The parms already have decls, so we need not do anything here
12792 except record them as in effect
12793 and complain if any redundant old-style parm decls were written. */
12795 tree specparms = current_function_parms;
12798 /* Must clear this because it might contain TYPE_DECLs declared
12800 current_binding_level->names = NULL;
12802 /* If we're doing semantic analysis, then we'll call pushdecl
12803 for each of these. We must do them in reverse order so that
12804 they end in the correct forward order. */
12805 specparms = nreverse (specparms);
12807 for (parm = specparms; parm; parm = next)
12809 next = DECL_CHAIN (parm);
12810 if (TREE_CODE (parm) == PARM_DECL)
12812 if (DECL_NAME (parm) == NULL_TREE
12813 || TREE_CODE (parm) != VOID_TYPE)
12816 error ("parameter %qD declared void", parm);
12820 /* If we find an enum constant or a type tag,
12821 put it aside for the moment. */
12822 TREE_CHAIN (parm) = NULL_TREE;
12823 nonparms = chainon (nonparms, parm);
12827 /* Get the decls in their original chain order and record in the
12828 function. This is all and only the PARM_DECLs that were
12829 pushed into scope by the loop above. */
12830 DECL_ARGUMENTS (fndecl) = getdecls ();
12833 DECL_ARGUMENTS (fndecl) = NULL_TREE;
12835 /* Now store the final chain of decls for the arguments
12836 as the decl-chain of the current lexical scope.
12837 Put the enumerators in as well, at the front so that
12838 DECL_ARGUMENTS is not modified. */
12839 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
12841 if (use_eh_spec_block (current_function_decl))
12842 current_eh_spec_block = begin_eh_spec_block ();
12846 /* We have finished doing semantic analysis on DECL, but have not yet
12847 generated RTL for its body. Save away our current state, so that
12848 when we want to generate RTL later we know what to do. */
12851 save_function_data (tree decl)
12853 struct language_function *f;
12855 /* Save the language-specific per-function data so that we can
12856 get it back when we really expand this function. */
12857 gcc_assert (!DECL_PENDING_INLINE_P (decl));
12860 f = ggc_alloc_language_function ();
12861 memcpy (f, cp_function_chain, sizeof (struct language_function));
12862 DECL_SAVED_FUNCTION_DATA (decl) = f;
12864 /* Clear out the bits we don't need. */
12865 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
12866 f->bindings = NULL;
12867 f->x_local_names = NULL;
12871 /* Set the return value of the constructor (if present). */
12874 finish_constructor_body (void)
12879 if (targetm.cxx.cdtor_returns_this ()
12880 && (! TYPE_FOR_JAVA (current_class_type)))
12882 /* Any return from a constructor will end up here. */
12883 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12885 val = DECL_ARGUMENTS (current_function_decl);
12886 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12887 DECL_RESULT (current_function_decl), val);
12888 /* Return the address of the object. */
12889 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12890 add_stmt (exprstmt);
12894 /* Do all the processing for the beginning of a destructor; set up the
12895 vtable pointers and cleanups for bases and members. */
12898 begin_destructor_body (void)
12900 tree compound_stmt;
12902 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
12903 issued an error message. We still want to try to process the
12904 body of the function, but initialize_vtbl_ptrs will crash if
12905 TYPE_BINFO is NULL. */
12906 if (COMPLETE_TYPE_P (current_class_type))
12908 compound_stmt = begin_compound_stmt (0);
12909 /* Make all virtual function table pointers in non-virtual base
12910 classes point to CURRENT_CLASS_TYPE's virtual function
12912 initialize_vtbl_ptrs (current_class_ptr);
12913 finish_compound_stmt (compound_stmt);
12915 /* And insert cleanups for our bases and members so that they
12916 will be properly destroyed if we throw. */
12917 push_base_cleanups ();
12921 /* At the end of every destructor we generate code to delete the object if
12922 necessary. Do that now. */
12925 finish_destructor_body (void)
12929 /* Any return from a destructor will end up here; that way all base
12930 and member cleanups will be run when the function returns. */
12931 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12933 /* In a virtual destructor, we must call delete. */
12934 if (DECL_VIRTUAL_P (current_function_decl))
12937 tree virtual_size = cxx_sizeof (current_class_type);
12941 At the point of definition of a virtual destructor (including
12942 an implicit definition), non-placement operator delete shall
12943 be looked up in the scope of the destructor's class and if
12944 found shall be accessible and unambiguous. */
12945 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
12947 /*global_p=*/false,
12948 /*placement=*/NULL_TREE,
12949 /*alloc_fn=*/NULL_TREE);
12951 if_stmt = begin_if_stmt ();
12952 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
12953 current_in_charge_parm,
12956 finish_expr_stmt (exprstmt);
12957 finish_then_clause (if_stmt);
12958 finish_if_stmt (if_stmt);
12961 if (targetm.cxx.cdtor_returns_this ())
12965 val = DECL_ARGUMENTS (current_function_decl);
12966 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12967 DECL_RESULT (current_function_decl), val);
12968 /* Return the address of the object. */
12969 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12970 add_stmt (exprstmt);
12974 /* Do the necessary processing for the beginning of a function body, which
12975 in this case includes member-initializers, but not the catch clauses of
12976 a function-try-block. Currently, this means opening a binding level
12977 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
12980 begin_function_body (void)
12984 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12987 if (processing_template_decl)
12988 /* Do nothing now. */;
12990 /* Always keep the BLOCK node associated with the outermost pair of
12991 curly braces of a function. These are needed for correct
12992 operation of dwarfout.c. */
12993 keep_next_level (true);
12995 stmt = begin_compound_stmt (BCS_FN_BODY);
12997 if (processing_template_decl)
12998 /* Do nothing now. */;
12999 else if (DECL_DESTRUCTOR_P (current_function_decl))
13000 begin_destructor_body ();
13005 /* Do the processing for the end of a function body. Currently, this means
13006 closing out the cleanups for fully-constructed bases and members, and in
13007 the case of the destructor, deleting the object if desired. Again, this
13008 is only meaningful for [cd]tors, since they are the only functions where
13009 there is a significant distinction between the main body and any
13010 function catch clauses. Handling, say, main() return semantics here
13011 would be wrong, as flowing off the end of a function catch clause for
13012 main() would also need to return 0. */
13015 finish_function_body (tree compstmt)
13017 if (compstmt == NULL_TREE)
13020 /* Close the block. */
13021 finish_compound_stmt (compstmt);
13023 if (processing_template_decl)
13024 /* Do nothing now. */;
13025 else if (DECL_CONSTRUCTOR_P (current_function_decl))
13026 finish_constructor_body ();
13027 else if (DECL_DESTRUCTOR_P (current_function_decl))
13028 finish_destructor_body ();
13031 /* Given a function, returns the BLOCK corresponding to the outermost level
13032 of curly braces, skipping the artificial block created for constructor
13036 outer_curly_brace_block (tree fndecl)
13038 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
13039 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
13040 /* Skip the artificial function body block. */
13041 block = BLOCK_SUBBLOCKS (block);
13045 /* If FNDECL is a class's key method, add the class to the list of
13046 keyed classes that should be emitted. */
13049 record_key_method_defined (tree fndecl)
13051 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
13052 && DECL_VIRTUAL_P (fndecl)
13053 && !processing_template_decl)
13055 tree fnclass = DECL_CONTEXT (fndecl);
13056 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
13057 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
13061 /* Subroutine of finish_function.
13062 Save the body of constexpr functions for possible
13063 future compile time evaluation. */
13066 maybe_save_function_definition (tree fun)
13068 if (!processing_template_decl
13069 && DECL_DECLARED_CONSTEXPR_P (fun)
13070 && !DECL_CLONED_FUNCTION_P (fun))
13071 register_constexpr_fundef (fun, DECL_SAVED_TREE (fun));
13074 /* Finish up a function declaration and compile that function
13075 all the way to assembler language output. The free the storage
13076 for the function definition.
13078 FLAGS is a bitwise or of the following values:
13080 We just finished processing the body of an in-class inline
13081 function definition. (This processing will have taken place
13082 after the class definition is complete.) */
13085 finish_function (int flags)
13087 tree fndecl = current_function_decl;
13088 tree fntype, ctype = NULL_TREE;
13089 int inclass_inline = (flags & 2) != 0;
13091 /* When we get some parse errors, we can end up without a
13092 current_function_decl, so cope. */
13093 if (fndecl == NULL_TREE)
13094 return error_mark_node;
13096 if (c_dialect_objc ())
13097 objc_finish_function ();
13099 gcc_assert (!defer_mark_used_calls);
13100 defer_mark_used_calls = true;
13102 record_key_method_defined (fndecl);
13104 fntype = TREE_TYPE (fndecl);
13106 /* TREE_READONLY (fndecl) = 1;
13107 This caused &foo to be of type ptr-to-const-function
13108 which then got a warning when stored in a ptr-to-function variable. */
13110 gcc_assert (building_stmt_tree ());
13111 /* The current function is being defined, so its DECL_INITIAL should
13112 be set, and unless there's a multiple definition, it should be
13113 error_mark_node. */
13114 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
13116 /* For a cloned function, we've already got all the code we need;
13117 there's no need to add any extra bits. */
13118 if (!DECL_CLONED_FUNCTION_P (fndecl))
13120 if (DECL_MAIN_P (current_function_decl))
13124 /* Make it so that `main' always returns 0 by default (or
13127 stmt = finish_return_stmt (integer_one_node);
13129 stmt = finish_return_stmt (integer_zero_node);
13131 /* Hack. We don't want the middle-end to warn that this
13132 return is unreachable, so put the statement on the
13135 location_t linezero = linemap_line_start (line_table, 0, 1);
13136 SET_EXPR_LOCATION (stmt, linezero);
13140 if (use_eh_spec_block (current_function_decl))
13141 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
13142 (TREE_TYPE (current_function_decl)),
13143 current_eh_spec_block);
13146 /* If we're saving up tree structure, tie off the function now. */
13147 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
13149 finish_fname_decls ();
13151 /* If this function can't throw any exceptions, remember that. */
13152 if (!processing_template_decl
13153 && !cp_function_chain->can_throw
13154 && !flag_non_call_exceptions
13155 && !decl_replaceable_p (fndecl))
13156 TREE_NOTHROW (fndecl) = 1;
13158 /* This must come after expand_function_end because cleanups might
13159 have declarations (from inline functions) that need to go into
13160 this function's blocks. */
13162 /* If the current binding level isn't the outermost binding level
13163 for this function, either there is a bug, or we have experienced
13164 syntax errors and the statement tree is malformed. */
13165 if (current_binding_level->kind != sk_function_parms)
13167 /* Make sure we have already experienced errors. */
13168 gcc_assert (errorcount);
13170 /* Throw away the broken statement tree and extra binding
13172 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
13174 while (current_binding_level->kind != sk_function_parms)
13176 if (current_binding_level->kind == sk_class)
13177 pop_nested_class ();
13179 poplevel (0, 0, 0);
13182 poplevel (1, 0, 1);
13184 /* Statements should always be full-expressions at the outermost set
13185 of curly braces for a function. */
13186 gcc_assert (stmts_are_full_exprs_p ());
13188 /* Save constexpr function body before it gets munged by
13189 the NRV transformation. */
13190 maybe_save_function_definition (fndecl);
13192 /* Set up the named return value optimization, if we can. Candidate
13193 variables are selected in check_return_expr. */
13194 if (current_function_return_value)
13196 tree r = current_function_return_value;
13199 if (r != error_mark_node
13200 /* This is only worth doing for fns that return in memory--and
13201 simpler, since we don't have to worry about promoted modes. */
13202 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
13203 /* Only allow this for variables declared in the outer scope of
13204 the function so we know that their lifetime always ends with a
13205 return; see g++.dg/opt/nrv6.C. We could be more flexible if
13206 we were to do this optimization in tree-ssa. */
13207 && (outer = outer_curly_brace_block (fndecl))
13208 && chain_member (r, BLOCK_VARS (outer)))
13209 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
13211 current_function_return_value = NULL_TREE;
13214 /* Remember that we were in class scope. */
13215 if (current_class_name)
13216 ctype = current_class_type;
13218 /* Must mark the RESULT_DECL as being in this function. */
13219 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
13221 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
13222 to the FUNCTION_DECL node itself. */
13223 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
13225 /* Save away current state, if appropriate. */
13226 if (!processing_template_decl)
13227 save_function_data (fndecl);
13229 /* Complain if there's just no return statement. */
13230 if (warn_return_type
13231 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
13232 && !dependent_type_p (TREE_TYPE (fntype))
13233 && !current_function_returns_value && !current_function_returns_null
13234 /* Don't complain if we abort or throw. */
13235 && !current_function_returns_abnormally
13236 /* Don't complain if we are declared noreturn. */
13237 && !TREE_THIS_VOLATILE (fndecl)
13238 && !DECL_NAME (DECL_RESULT (fndecl))
13239 && !TREE_NO_WARNING (fndecl)
13240 /* Structor return values (if any) are set by the compiler. */
13241 && !DECL_CONSTRUCTOR_P (fndecl)
13242 && !DECL_DESTRUCTOR_P (fndecl))
13244 warning (OPT_Wreturn_type,
13245 "no return statement in function returning non-void");
13246 TREE_NO_WARNING (fndecl) = 1;
13249 /* Store the end of the function, so that we get good line number
13250 info for the epilogue. */
13251 cfun->function_end_locus = input_location;
13253 /* Complain about parameters that are only set, but never otherwise used. */
13254 if (warn_unused_but_set_parameter
13255 && !processing_template_decl
13256 && errorcount == unused_but_set_errorcount
13257 && !DECL_CLONED_FUNCTION_P (fndecl))
13261 for (decl = DECL_ARGUMENTS (fndecl);
13263 decl = DECL_CHAIN (decl))
13264 if (TREE_USED (decl)
13265 && TREE_CODE (decl) == PARM_DECL
13266 && !DECL_READ_P (decl)
13267 && DECL_NAME (decl)
13268 && !DECL_ARTIFICIAL (decl)
13269 && !TREE_NO_WARNING (decl)
13270 && !DECL_IN_SYSTEM_HEADER (decl)
13271 && TREE_TYPE (decl) != error_mark_node
13272 && TREE_CODE (TREE_TYPE (decl)) != REFERENCE_TYPE
13273 && (!CLASS_TYPE_P (TREE_TYPE (decl))
13274 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
13275 warning (OPT_Wunused_but_set_parameter,
13276 "parameter %q+D set but not used", decl);
13277 unused_but_set_errorcount = errorcount;
13280 /* Genericize before inlining. */
13281 if (!processing_template_decl)
13283 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
13284 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE, fndecl);
13285 cp_genericize (fndecl);
13286 /* Clear out the bits we don't need. */
13287 f->x_current_class_ptr = NULL;
13288 f->x_current_class_ref = NULL;
13289 f->x_eh_spec_block = NULL;
13290 f->x_in_charge_parm = NULL;
13291 f->x_vtt_parm = NULL;
13292 f->x_return_value = NULL;
13293 f->bindings = NULL;
13294 f->extern_decl_map = NULL;
13296 /* Clear out the bits we don't need. */
13297 local_names = NULL;
13299 /* We're leaving the context of this function, so zap cfun. It's still in
13300 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
13302 current_function_decl = NULL;
13304 /* If this is an in-class inline definition, we may have to pop the
13305 bindings for the template parameters that we added in
13306 maybe_begin_member_template_processing when start_function was
13308 if (inclass_inline)
13309 maybe_end_member_template_processing ();
13311 /* Leave the scope of the class. */
13313 pop_nested_class ();
13318 current_function_decl = NULL_TREE;
13320 defer_mark_used_calls = false;
13321 if (deferred_mark_used_calls)
13326 FOR_EACH_VEC_ELT (tree, deferred_mark_used_calls, i, decl)
13328 VEC_free (tree, gc, deferred_mark_used_calls);
13334 /* Create the FUNCTION_DECL for a function definition.
13335 DECLSPECS and DECLARATOR are the parts of the declaration;
13336 they describe the return type and the name of the function,
13337 but twisted together in a fashion that parallels the syntax of C.
13339 This function creates a binding context for the function body
13340 as well as setting up the FUNCTION_DECL in current_function_decl.
13342 Returns a FUNCTION_DECL on success.
13344 If the DECLARATOR is not suitable for a function (it defines a datum
13345 instead), we return 0, which tells yyparse to report a parse error.
13347 May return void_type_node indicating that this method is actually
13348 a friend. See grokfield for more details.
13350 Came here with a `.pushlevel' .
13352 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
13353 CHANGES TO CODE IN `grokfield'. */
13356 grokmethod (cp_decl_specifier_seq *declspecs,
13357 const cp_declarator *declarator, tree attrlist)
13359 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
13362 if (fndecl == error_mark_node)
13363 return error_mark_node;
13365 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
13367 error ("invalid member function declaration");
13368 return error_mark_node;
13372 cplus_decl_attributes (&fndecl, attrlist, 0);
13374 /* Pass friends other than inline friend functions back. */
13375 if (fndecl == void_type_node)
13378 if (DECL_IN_AGGR_P (fndecl))
13380 if (DECL_CLASS_SCOPE_P (fndecl))
13381 error ("%qD is already defined in class %qT", fndecl,
13382 DECL_CONTEXT (fndecl));
13383 return error_mark_node;
13386 check_template_shadow (fndecl);
13388 DECL_DECLARED_INLINE_P (fndecl) = 1;
13389 DECL_NO_INLINE_WARNING_P (fndecl) = 1;
13391 /* We process method specializations in finish_struct_1. */
13392 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
13394 fndecl = push_template_decl (fndecl);
13395 if (fndecl == error_mark_node)
13399 if (! DECL_FRIEND_P (fndecl))
13401 if (DECL_CHAIN (fndecl))
13403 fndecl = copy_node (fndecl);
13404 TREE_CHAIN (fndecl) = NULL_TREE;
13408 cp_finish_decl (fndecl, NULL_TREE, false, NULL_TREE, 0);
13410 DECL_IN_AGGR_P (fndecl) = 1;
13415 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
13416 we can lay it out later, when and if its type becomes complete. */
13419 maybe_register_incomplete_var (tree var)
13421 gcc_assert (TREE_CODE (var) == VAR_DECL);
13423 /* Keep track of variables with incomplete types. */
13424 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
13425 && DECL_EXTERNAL (var))
13427 tree inner_type = TREE_TYPE (var);
13429 while (TREE_CODE (inner_type) == ARRAY_TYPE)
13430 inner_type = TREE_TYPE (inner_type);
13431 inner_type = TYPE_MAIN_VARIANT (inner_type);
13433 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
13434 /* RTTI TD entries are created while defining the type_info. */
13435 || (TYPE_LANG_SPECIFIC (inner_type)
13436 && TYPE_BEING_DEFINED (inner_type)))
13439 = VEC_safe_push (incomplete_var, gc, incomplete_vars, NULL);
13441 iv->incomplete_type = inner_type;
13446 /* Called when a class type (given by TYPE) is defined. If there are
13447 any existing VAR_DECLs whose type has been completed by this
13448 declaration, update them now. */
13451 complete_vars (tree type)
13454 incomplete_var *iv;
13456 for (ix = 0; VEC_iterate (incomplete_var, incomplete_vars, ix, iv); )
13458 if (same_type_p (type, iv->incomplete_type))
13460 tree var = iv->decl;
13461 tree type = TREE_TYPE (var);
13462 /* Complete the type of the variable. The VAR_DECL itself
13463 will be laid out in expand_expr. */
13464 complete_type (type);
13465 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
13466 /* Remove this entry from the list. */
13467 VEC_unordered_remove (incomplete_var, incomplete_vars, ix);
13473 /* Check for pending declarations which may have abstract type. */
13474 complete_type_check_abstract (type);
13477 /* If DECL is of a type which needs a cleanup, build and return an
13478 expression to perform that cleanup here. Return NULL_TREE if no
13479 cleanup need be done. */
13482 cxx_maybe_build_cleanup (tree decl, tsubst_flags_t complain)
13488 /* Assume no cleanup is required. */
13489 cleanup = NULL_TREE;
13491 if (error_operand_p (decl))
13494 /* Handle "__attribute__((cleanup))". We run the cleanup function
13495 before the destructor since the destructor is what actually
13496 terminates the lifetime of the object. */
13497 attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl));
13504 /* Get the name specified by the user for the cleanup function. */
13505 id = TREE_VALUE (TREE_VALUE (attr));
13506 /* Look up the name to find the cleanup function to call. It is
13507 important to use lookup_name here because that is what is
13508 used in c-common.c:handle_cleanup_attribute when performing
13509 initial checks on the attribute. Note that those checks
13510 include ensuring that the function found is not an overloaded
13511 function, or an object with an overloaded call operator,
13512 etc.; we can rely on the fact that the function found is an
13513 ordinary FUNCTION_DECL. */
13514 fn = lookup_name (id);
13515 arg = build_address (decl);
13517 cleanup = cp_build_function_call_nary (fn, complain, arg, NULL_TREE);
13518 if (cleanup == error_mark_node)
13519 return error_mark_node;
13521 /* Handle ordinary C++ destructors. */
13522 type = TREE_TYPE (decl);
13523 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
13525 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
13526 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
13527 && CLASSTYPE_VBASECLASSES (type));
13531 if (TREE_CODE (type) == ARRAY_TYPE)
13534 addr = build_address (decl);
13536 /* Optimize for space over speed here. */
13537 if (!has_vbases || flag_expensive_optimizations)
13538 flags |= LOOKUP_NONVIRTUAL;
13540 call = build_delete (TREE_TYPE (addr), addr,
13541 sfk_complete_destructor, flags, 0, complain);
13542 if (call == error_mark_node)
13543 cleanup = error_mark_node;
13545 cleanup = cp_build_compound_expr (cleanup, call, complain);
13553 /* When a stmt has been parsed, this function is called. */
13560 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
13561 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
13562 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
13565 static_fn_type (tree memfntype)
13570 if (TYPE_PTRMEMFUNC_P (memfntype))
13571 memfntype = TYPE_PTRMEMFUNC_FN_TYPE (memfntype);
13572 if (POINTER_TYPE_P (memfntype)
13573 || TREE_CODE (memfntype) == FUNCTION_DECL)
13574 memfntype = TREE_TYPE (memfntype);
13575 if (TREE_CODE (memfntype) == FUNCTION_TYPE)
13577 gcc_assert (TREE_CODE (memfntype) == METHOD_TYPE);
13578 args = TYPE_ARG_TYPES (memfntype);
13579 fntype = build_function_type (TREE_TYPE (memfntype), TREE_CHAIN (args));
13580 fntype = apply_memfn_quals (fntype, type_memfn_quals (memfntype));
13581 fntype = (cp_build_type_attribute_variant
13582 (fntype, TYPE_ATTRIBUTES (memfntype)));
13583 fntype = (build_exception_variant
13584 (fntype, TYPE_RAISES_EXCEPTIONS (memfntype)));
13588 /* DECL was originally constructed as a non-static member function,
13589 but turned out to be static. Update it accordingly. */
13592 revert_static_member_fn (tree decl)
13594 tree stype = static_fn_type (decl);
13595 cp_cv_quals quals = type_memfn_quals (stype);
13597 if (quals != TYPE_UNQUALIFIED)
13598 stype = apply_memfn_quals (stype, TYPE_UNQUALIFIED);
13600 TREE_TYPE (decl) = stype;
13602 if (DECL_ARGUMENTS (decl))
13603 DECL_ARGUMENTS (decl) = DECL_CHAIN (DECL_ARGUMENTS (decl));
13604 DECL_STATIC_FUNCTION_P (decl) = 1;
13607 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
13608 one of the language-independent trees. */
13610 enum cp_tree_node_structure_enum
13611 cp_tree_node_structure (union lang_tree_node * t)
13613 switch (TREE_CODE (&t->generic))
13615 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
13616 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
13617 case OVERLOAD: return TS_CP_OVERLOAD;
13618 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
13619 case PTRMEM_CST: return TS_CP_PTRMEM;
13620 case BASELINK: return TS_CP_BASELINK;
13621 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
13622 case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
13623 case TRAIT_EXPR: return TS_CP_TRAIT_EXPR;
13624 case LAMBDA_EXPR: return TS_CP_LAMBDA_EXPR;
13625 case TEMPLATE_INFO: return TS_CP_TEMPLATE_INFO;
13626 default: return TS_CP_GENERIC;
13630 /* Build the void_list_node (void_type_node having been created). */
13632 build_void_list_node (void)
13634 tree t = build_tree_list (NULL_TREE, void_type_node);
13639 cp_missing_noreturn_ok_p (tree decl)
13641 /* A missing noreturn is ok for the `main' function. */
13642 return DECL_MAIN_P (decl);
13645 /* Return the COMDAT group into which DECL should be placed. */
13648 cxx_comdat_group (tree decl)
13652 /* Virtual tables, construction virtual tables, and virtual table
13653 tables all go in a single COMDAT group, named after the primary
13655 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
13656 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
13657 /* For all other DECLs, the COMDAT group is the mangled name of the
13658 declaration itself. */
13661 while (DECL_THUNK_P (decl))
13663 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
13664 into the same section as the target function. In that case
13665 we must return target's name. */
13666 tree target = THUNK_TARGET (decl);
13667 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
13668 && DECL_SECTION_NAME (target) != NULL
13669 && DECL_ONE_ONLY (target))
13674 name = DECL_ASSEMBLER_NAME (decl);
13680 #include "gt-cp-decl.h"