1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
4 Free Software Foundation, Inc.
5 Contributed by Michael Tiemann (tiemann@cygnus.com)
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3, or (at your option)
14 GCC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
38 #include "tree-iterator.h"
39 #include "tree-inline.h"
47 #include "c-family/c-common.h"
48 #include "c-family/c-objc.h"
49 #include "c-family/c-pragma.h"
50 #include "diagnostic.h"
54 #include "pointer-set.h"
55 #include "splay-tree.h"
58 /* Possible cases of bad specifiers type used by bad_specifiers. */
60 BSP_VAR, /* variable */
61 BSP_PARM, /* parameter */
66 static tree grokparms (tree parmlist, tree *);
67 static const char *redeclaration_error_message (tree, tree);
69 static int decl_jump_unsafe (tree);
70 static void require_complete_types_for_parms (tree);
71 static int ambi_op_p (enum tree_code);
72 static int unary_op_p (enum tree_code);
73 static void push_local_name (tree);
74 static tree grok_reference_init (tree, tree, tree, tree *);
75 static tree grokvardecl (tree, tree, const cp_decl_specifier_seq *,
77 static void record_unknown_type (tree, const char *);
78 static tree builtin_function_1 (tree, tree, bool);
79 static tree build_library_fn_1 (tree, enum tree_code, tree);
80 static int member_function_or_else (tree, tree, enum overload_flags);
81 static void bad_specifiers (tree, enum bad_spec_place, int, int, int, int,
83 static void check_for_uninitialized_const_var (tree);
84 static hashval_t typename_hash (const void *);
85 static int typename_compare (const void *, const void *);
86 static tree local_variable_p_walkfn (tree *, int *, void *);
87 static tree record_builtin_java_type (const char *, int);
88 static const char *tag_name (enum tag_types);
89 static tree lookup_and_check_tag (enum tag_types, tree, tag_scope, bool);
90 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
91 static void maybe_deduce_size_from_array_init (tree, tree);
92 static void layout_var_decl (tree);
93 static tree check_initializer (tree, tree, int, tree *);
94 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
95 static void save_function_data (tree);
96 static void copy_type_enum (tree , tree);
97 static void check_function_type (tree, tree);
98 static void finish_constructor_body (void);
99 static void begin_destructor_body (void);
100 static void finish_destructor_body (void);
101 static void record_key_method_defined (tree);
102 static tree create_array_type_for_decl (tree, tree, tree);
103 static tree get_atexit_node (void);
104 static tree get_dso_handle_node (void);
105 static tree start_cleanup_fn (void);
106 static void end_cleanup_fn (void);
107 static tree cp_make_fname_decl (location_t, tree, int);
108 static void initialize_predefined_identifiers (void);
109 static tree check_special_function_return_type
110 (special_function_kind, tree, tree);
111 static tree push_cp_library_fn (enum tree_code, tree);
112 static tree build_cp_library_fn (tree, enum tree_code, tree);
113 static void store_parm_decls (tree);
114 static void initialize_local_var (tree, tree);
115 static void expand_static_init (tree, tree);
117 /* The following symbols are subsumed in the cp_global_trees array, and
118 listed here individually for documentation purposes.
121 tree wchar_decl_node;
123 tree vtable_entry_type;
124 tree delta_type_node;
125 tree __t_desc_type_node;
127 tree class_type_node;
128 tree unknown_type_node;
130 Array type `vtable_entry_type[]'
133 tree vtbl_ptr_type_node;
140 A FUNCTION_DECL which can call `abort'. Not necessarily the
141 one that the user will declare, but sufficient to be called
142 by routines that want to abort the program.
146 The FUNCTION_DECL for the default `::operator delete'.
148 tree global_delete_fndecl;
151 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
152 tree tinfo_var_id; */
154 tree cp_global_trees[CPTI_MAX];
156 /* Indicates that there is a type value in some namespace, although
157 that is not necessarily in scope at the moment. */
159 tree global_type_node;
161 /* The node that holds the "name" of the global scope. */
162 tree global_scope_name;
164 #define local_names cp_function_chain->x_local_names
166 /* A list of objects which have constructors or destructors
167 which reside in the global scope. The decl is stored in
168 the TREE_VALUE slot and the initializer is stored
169 in the TREE_PURPOSE slot. */
170 tree static_aggregates;
174 /* A node for the integer constant 2. */
176 tree integer_two_node;
178 /* Used only for jumps to as-yet undefined labels, since jumps to
179 defined labels can have their validity checked immediately. */
181 struct GTY((chain_next ("%h.next"))) named_label_use_entry {
182 struct named_label_use_entry *next;
183 /* The binding level to which this entry is *currently* attached.
184 This is initially the binding level in which the goto appeared,
185 but is modified as scopes are closed. */
186 struct cp_binding_level *binding_level;
187 /* The head of the names list that was current when the goto appeared,
188 or the inner scope popped. These are the decls that will *not* be
189 skipped when jumping to the label. */
191 /* The location of the goto, for error reporting. */
192 location_t o_goto_locus;
193 /* True if an OpenMP structured block scope has been closed since
194 the goto appeared. This means that the branch from the label will
195 illegally exit an OpenMP scope. */
199 /* A list of all LABEL_DECLs in the function that have names. Here so
200 we can clear out their names' definitions at the end of the
201 function, and so we can check the validity of jumps to these labels. */
203 struct GTY(()) named_label_entry {
204 /* The decl itself. */
207 /* The binding level to which the label is *currently* attached.
208 This is initially set to the binding level in which the label
209 is defined, but is modified as scopes are closed. */
210 struct cp_binding_level *binding_level;
211 /* The head of the names list that was current when the label was
212 defined, or the inner scope popped. These are the decls that will
213 be skipped when jumping to the label. */
215 /* A vector of all decls from all binding levels that would be
216 crossed by a backward branch to the label. */
217 VEC(tree,gc) *bad_decls;
219 /* A list of uses of the label, before the label is defined. */
220 struct named_label_use_entry *uses;
222 /* The following bits are set after the label is defined, and are
223 updated as scopes are popped. They indicate that a backward jump
224 to the label will illegally enter a scope of the given flavor. */
230 #define named_labels cp_function_chain->x_named_labels
232 /* The number of function bodies which we are currently processing.
233 (Zero if we are at namespace scope, one inside the body of a
234 function, two inside the body of a function in a local class, etc.) */
237 /* To avoid unwanted recursion, finish_function defers all mark_used calls
238 encountered during its execution until it finishes. */
239 bool defer_mark_used_calls;
240 VEC(tree, gc) *deferred_mark_used_calls;
242 /* States indicating how grokdeclarator() should handle declspecs marked
243 with __attribute__((deprecated)). An object declared as
244 __attribute__((deprecated)) suppresses warnings of uses of other
246 enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
249 /* A list of VAR_DECLs whose type was incomplete at the time the
250 variable was declared. */
252 typedef struct GTY(()) incomplete_var_d {
254 tree incomplete_type;
257 DEF_VEC_O(incomplete_var);
258 DEF_VEC_ALLOC_O(incomplete_var,gc);
260 static GTY(()) VEC(incomplete_var,gc) *incomplete_vars;
262 /* Returns the kind of template specialization we are currently
263 processing, given that it's declaration contained N_CLASS_SCOPES
264 explicit scope qualifications. */
267 current_tmpl_spec_kind (int n_class_scopes)
269 int n_template_parm_scopes = 0;
270 int seen_specialization_p = 0;
271 int innermost_specialization_p = 0;
272 struct cp_binding_level *b;
274 /* Scan through the template parameter scopes. */
275 for (b = current_binding_level;
276 b->kind == sk_template_parms;
279 /* If we see a specialization scope inside a parameter scope,
280 then something is wrong. That corresponds to a declaration
283 template <class T> template <> ...
285 which is always invalid since [temp.expl.spec] forbids the
286 specialization of a class member template if the enclosing
287 class templates are not explicitly specialized as well. */
288 if (b->explicit_spec_p)
290 if (n_template_parm_scopes == 0)
291 innermost_specialization_p = 1;
293 seen_specialization_p = 1;
295 else if (seen_specialization_p == 1)
296 return tsk_invalid_member_spec;
298 ++n_template_parm_scopes;
301 /* Handle explicit instantiations. */
302 if (processing_explicit_instantiation)
304 if (n_template_parm_scopes != 0)
305 /* We've seen a template parameter list during an explicit
306 instantiation. For example:
308 template <class T> template void f(int);
310 This is erroneous. */
311 return tsk_invalid_expl_inst;
313 return tsk_expl_inst;
316 if (n_template_parm_scopes < n_class_scopes)
317 /* We've not seen enough template headers to match all the
318 specialized classes present. For example:
320 template <class T> void R<T>::S<T>::f(int);
322 This is invalid; there needs to be one set of template
323 parameters for each class. */
324 return tsk_insufficient_parms;
325 else if (n_template_parm_scopes == n_class_scopes)
326 /* We're processing a non-template declaration (even though it may
327 be a member of a template class.) For example:
329 template <class T> void S<T>::f(int);
331 The `class T' matches the `S<T>', leaving no template headers
332 corresponding to the `f'. */
334 else if (n_template_parm_scopes > n_class_scopes + 1)
335 /* We've got too many template headers. For example:
337 template <> template <class T> void f (T);
339 There need to be more enclosing classes. */
340 return tsk_excessive_parms;
342 /* This must be a template. It's of the form:
344 template <class T> template <class U> void S<T>::f(U);
346 This is a specialization if the innermost level was a
347 specialization; otherwise it's just a definition of the
349 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
352 /* Exit the current scope. */
360 /* When a label goes out of scope, check to see if that label was used
361 in a valid manner, and issue any appropriate warnings or errors. */
364 pop_label (tree label, tree old_value)
366 if (!processing_template_decl)
368 if (DECL_INITIAL (label) == NULL_TREE)
372 error ("label %q+D used but not defined", label);
373 location = input_location; /* FIXME want (input_filename, (line)0) */
374 /* Avoid crashing later. */
375 define_label (location, DECL_NAME (label));
378 warn_for_unused_label (label);
381 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
384 /* At the end of a function, all labels declared within the function
385 go out of scope. BLOCK is the top-level block for the
389 pop_labels_1 (void **slot, void *data)
391 struct named_label_entry *ent = (struct named_label_entry *) *slot;
392 tree block = (tree) data;
394 pop_label (ent->label_decl, NULL_TREE);
396 /* Put the labels into the "variables" of the top-level block,
397 so debugger can see them. */
398 DECL_CHAIN (ent->label_decl) = BLOCK_VARS (block);
399 BLOCK_VARS (block) = ent->label_decl;
401 htab_clear_slot (named_labels, slot);
407 pop_labels (tree block)
411 htab_traverse (named_labels, pop_labels_1, block);
416 /* At the end of a block with local labels, restore the outer definition. */
419 pop_local_label (tree label, tree old_value)
421 struct named_label_entry dummy;
424 pop_label (label, old_value);
426 dummy.label_decl = label;
427 slot = htab_find_slot (named_labels, &dummy, NO_INSERT);
428 htab_clear_slot (named_labels, slot);
431 /* The following two routines are used to interface to Objective-C++.
432 The binding level is purposely treated as an opaque type. */
435 objc_get_current_scope (void)
437 return current_binding_level;
440 /* The following routine is used by the NeXT-style SJLJ exceptions;
441 variables get marked 'volatile' so as to not be clobbered by
442 _setjmp()/_longjmp() calls. All variables in the current scope,
443 as well as parent scopes up to (but not including) ENCLOSING_BLK
444 shall be thusly marked. */
447 objc_mark_locals_volatile (void *enclosing_blk)
449 struct cp_binding_level *scope;
451 for (scope = current_binding_level;
452 scope && scope != enclosing_blk;
453 scope = scope->level_chain)
457 for (decl = scope->names; decl; decl = TREE_CHAIN (decl))
458 objc_volatilize_decl (decl);
460 /* Do not climb up past the current function. */
461 if (scope->kind == sk_function_parms)
466 /* Update data for defined and undefined labels when leaving a scope. */
469 poplevel_named_label_1 (void **slot, void *data)
471 struct named_label_entry *ent = (struct named_label_entry *) *slot;
472 struct cp_binding_level *bl = (struct cp_binding_level *) data;
473 struct cp_binding_level *obl = bl->level_chain;
475 if (ent->binding_level == bl)
479 /* ENT->NAMES_IN_SCOPE may contain a mixture of DECLs and
480 TREE_LISTs representing OVERLOADs, so be careful. */
481 for (decl = ent->names_in_scope; decl; decl = (DECL_P (decl)
483 : TREE_CHAIN (decl)))
484 if (decl_jump_unsafe (decl))
485 VEC_safe_push (tree, gc, ent->bad_decls, decl);
487 ent->binding_level = obl;
488 ent->names_in_scope = obl->names;
492 ent->in_try_scope = true;
495 ent->in_catch_scope = true;
498 ent->in_omp_scope = true;
506 struct named_label_use_entry *use;
508 for (use = ent->uses; use ; use = use->next)
509 if (use->binding_level == bl)
511 use->binding_level = obl;
512 use->names_in_scope = obl->names;
513 if (bl->kind == sk_omp)
514 use->in_omp_scope = true;
521 /* Saved errorcount to avoid -Wunused-but-set-{parameter,variable} warnings
522 when errors were reported, except for -Werror-unused-but-set-*. */
523 static int unused_but_set_errorcount;
525 /* Exit a binding level.
526 Pop the level off, and restore the state of the identifier-decl mappings
527 that were in effect when this level was entered.
529 If KEEP == 1, this level had explicit declarations, so
530 and create a "block" (a BLOCK node) for the level
531 to record its declarations and subblocks for symbol table output.
533 If FUNCTIONBODY is nonzero, this level is the body of a function,
534 so create a block as if KEEP were set and also clear out all
537 If REVERSE is nonzero, reverse the order of decls before putting
538 them into the BLOCK. */
541 poplevel (int keep, int reverse, int functionbody)
544 /* The chain of decls was accumulated in reverse order.
545 Put it into forward order, just for cleanliness. */
550 int leaving_for_scope;
553 cp_label_binding *label_bind;
555 timevar_start (TV_NAME_LOOKUP);
560 gcc_assert (current_binding_level->kind != sk_class);
562 if (current_binding_level->kind == sk_cleanup)
564 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
566 gcc_assert (!VEC_length(cp_class_binding,
567 current_binding_level->class_shadowed));
569 /* We used to use KEEP == 2 to indicate that the new block should go
570 at the beginning of the list of blocks at this binding level,
571 rather than the end. This hack is no longer used. */
572 gcc_assert (keep == 0 || keep == 1);
574 if (current_binding_level->keep)
577 /* Any uses of undefined labels, and any defined labels, now operate
578 under constraints of next binding contour. */
579 if (cfun && !functionbody && named_labels)
580 htab_traverse (named_labels, poplevel_named_label_1,
581 current_binding_level);
583 /* Get the decls in the order they were written.
584 Usually current_binding_level->names is in reverse order.
585 But parameter decls were previously put in forward order. */
588 current_binding_level->names
589 = decls = nreverse (current_binding_level->names);
591 decls = current_binding_level->names;
593 /* If there were any declarations or structure tags in that level,
594 or if this level is a function body,
595 create a BLOCK to record them for the life of this function. */
597 if (keep == 1 || functionbody)
598 block = make_node (BLOCK);
599 if (block != NULL_TREE)
601 BLOCK_VARS (block) = decls;
602 BLOCK_SUBBLOCKS (block) = subblocks;
605 /* In each subblock, record that this is its superior. */
607 for (link = subblocks; link; link = BLOCK_CHAIN (link))
608 BLOCK_SUPERCONTEXT (link) = block;
610 /* We still support the old for-scope rules, whereby the variables
611 in a for-init statement were in scope after the for-statement
612 ended. We only use the new rules if flag_new_for_scope is
615 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
617 /* Before we remove the declarations first check for unused variables. */
618 if ((warn_unused_variable || warn_unused_but_set_variable)
619 && !processing_template_decl)
620 for (decl = getdecls (); decl; decl = TREE_CHAIN (decl))
621 if (TREE_CODE (decl) == VAR_DECL
622 && (! TREE_USED (decl) || !DECL_READ_P (decl))
623 && ! DECL_IN_SYSTEM_HEADER (decl)
624 && DECL_NAME (decl) && ! DECL_ARTIFICIAL (decl))
626 if (! TREE_USED (decl))
627 warning (OPT_Wunused_variable, "unused variable %q+D", decl);
628 else if (DECL_CONTEXT (decl) == current_function_decl
629 && TREE_TYPE (decl) != error_mark_node
630 && TREE_CODE (TREE_TYPE (decl)) != REFERENCE_TYPE
631 && errorcount == unused_but_set_errorcount
632 && (!CLASS_TYPE_P (TREE_TYPE (decl))
633 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
635 warning (OPT_Wunused_but_set_variable,
636 "variable %q+D set but not used", decl);
637 unused_but_set_errorcount = errorcount;
641 /* Remove declarations for all the DECLs in this level. */
642 for (link = decls; link; link = TREE_CHAIN (link))
644 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
647 tree name = DECL_NAME (link);
651 ob = outer_binding (name,
652 IDENTIFIER_BINDING (name),
655 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
657 ns_binding = NULL_TREE;
659 if (ob && ob->scope == current_binding_level->level_chain)
660 /* We have something like:
665 and we are leaving the `for' scope. There's no reason to
666 keep the binding of the inner `i' in this case. */
667 pop_binding (name, link);
668 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
669 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
670 /* Here, we have something like:
678 We must pop the for-scope binding so we know what's a
679 type and what isn't. */
680 pop_binding (name, link);
683 /* Mark this VAR_DECL as dead so that we can tell we left it
684 there only for backward compatibility. */
685 DECL_DEAD_FOR_LOCAL (link) = 1;
687 /* Keep track of what should have happened when we
688 popped the binding. */
691 SET_DECL_SHADOWED_FOR_VAR (link, ob->value);
692 DECL_HAS_SHADOWED_FOR_VAR_P (link) = 1;
695 /* Add it to the list of dead variables in the next
696 outermost binding to that we can remove these when we
697 leave that binding. */
698 VEC_safe_push (tree, gc,
699 current_binding_level->level_chain->dead_vars_from_for,
702 /* Although we don't pop the cxx_binding, we do clear
703 its SCOPE since the scope is going away now. */
704 IDENTIFIER_BINDING (name)->scope
705 = current_binding_level->level_chain;
712 /* Remove the binding. */
715 if (TREE_CODE (decl) == TREE_LIST)
716 decl = TREE_VALUE (decl);
719 if (TREE_CODE (name) == OVERLOAD)
720 name = OVL_FUNCTION (name);
722 gcc_assert (DECL_P (name));
723 pop_binding (DECL_NAME (name), decl);
727 /* Remove declarations for any `for' variables from inner scopes
728 that we kept around. */
729 FOR_EACH_VEC_ELT_REVERSE (tree, current_binding_level->dead_vars_from_for,
731 pop_binding (DECL_NAME (decl), decl);
733 /* Restore the IDENTIFIER_TYPE_VALUEs. */
734 for (link = current_binding_level->type_shadowed;
735 link; link = TREE_CHAIN (link))
736 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
738 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
739 FOR_EACH_VEC_ELT_REVERSE (cp_label_binding,
740 current_binding_level->shadowed_labels,
742 pop_local_label (label_bind->label, label_bind->prev_value);
744 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
745 list if a `using' declaration put them there. The debugging
746 back ends won't understand OVERLOAD, so we remove them here.
747 Because the BLOCK_VARS are (temporarily) shared with
748 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
749 popped all the bindings. */
754 for (d = &BLOCK_VARS (block); *d; )
756 if (TREE_CODE (*d) == TREE_LIST)
757 *d = TREE_CHAIN (*d);
759 d = &DECL_CHAIN (*d);
763 /* If the level being exited is the top level of a function,
764 check over all the labels. */
767 /* Since this is the top level block of a function, the vars are
768 the function's parameters. Don't leave them in the BLOCK
769 because they are found in the FUNCTION_DECL instead. */
770 BLOCK_VARS (block) = 0;
774 kind = current_binding_level->kind;
775 if (kind == sk_cleanup)
779 /* If this is a temporary binding created for a cleanup, then we'll
780 have pushed a statement list level. Pop that, create a new
781 BIND_EXPR for the block, and insert it into the stream. */
782 stmt = pop_stmt_list (current_binding_level->statement_list);
783 stmt = c_build_bind_expr (input_location, block, stmt);
790 /* The current function is being defined, so its DECL_INITIAL
791 should be error_mark_node. */
792 gcc_assert (DECL_INITIAL (current_function_decl) == error_mark_node);
793 DECL_INITIAL (current_function_decl) = block;
796 current_binding_level->blocks
797 = block_chainon (current_binding_level->blocks, block);
799 /* If we did not make a block for the level just exited,
800 any blocks made for inner levels
801 (since they cannot be recorded as subblocks in that level)
802 must be carried forward so they will later become subblocks
803 of something else. */
805 current_binding_level->blocks
806 = block_chainon (current_binding_level->blocks, subblocks);
808 /* Each and every BLOCK node created here in `poplevel' is important
809 (e.g. for proper debugging information) so if we created one
810 earlier, mark it as "used". */
812 TREE_USED (block) = 1;
814 /* All temporary bindings created for cleanups are popped silently. */
815 if (kind == sk_cleanup)
818 timevar_stop (TV_NAME_LOOKUP);
822 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
823 itself, calling F for each. The DATA is passed to F as well. */
826 walk_namespaces_r (tree name_space, walk_namespaces_fn f, void* data)
829 tree current = NAMESPACE_LEVEL (name_space)->namespaces;
831 result |= (*f) (name_space, data);
833 for (; current; current = DECL_CHAIN (current))
834 result |= walk_namespaces_r (current, f, data);
839 /* Walk all the namespaces, calling F for each. The DATA is passed to
843 walk_namespaces (walk_namespaces_fn f, void* data)
845 return walk_namespaces_r (global_namespace, f, data);
848 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
849 DATA is non-NULL, this is the last time we will call
850 wrapup_global_declarations for this NAMESPACE. */
853 wrapup_globals_for_namespace (tree name_space, void* data)
855 struct cp_binding_level *level = NAMESPACE_LEVEL (name_space);
856 VEC(tree,gc) *statics = level->static_decls;
857 tree *vec = VEC_address (tree, statics);
858 int len = VEC_length (tree, statics);
859 int last_time = (data != 0);
863 check_global_declarations (vec, len);
864 emit_debug_global_declarations (vec, len);
868 /* Write out any globals that need to be output. */
869 return wrapup_global_declarations (vec, len);
873 /* In C++, you don't have to write `struct S' to refer to `S'; you
874 can just use `S'. We accomplish this by creating a TYPE_DECL as
875 if the user had written `typedef struct S S'. Create and return
876 the TYPE_DECL for TYPE. */
879 create_implicit_typedef (tree name, tree type)
883 decl = build_decl (input_location, TYPE_DECL, name, type);
884 DECL_ARTIFICIAL (decl) = 1;
885 /* There are other implicit type declarations, like the one *within*
886 a class that allows you to write `S::S'. We must distinguish
888 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
889 TYPE_NAME (type) = decl;
890 TYPE_STUB_DECL (type) = decl;
895 /* Remember a local name for name-mangling purposes. */
898 push_local_name (tree decl)
903 timevar_start (TV_NAME_LOOKUP);
905 name = DECL_NAME (decl);
907 nelts = VEC_length (tree, local_names);
908 for (i = 0; i < nelts; i++)
910 t = VEC_index (tree, local_names, i);
911 if (DECL_NAME (t) == name)
913 if (!DECL_LANG_SPECIFIC (decl))
914 retrofit_lang_decl (decl);
915 DECL_LANG_SPECIFIC (decl)->u.base.u2sel = 1;
916 if (DECL_LANG_SPECIFIC (t))
917 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
919 DECL_DISCRIMINATOR (decl) = 1;
921 VEC_replace (tree, local_names, i, decl);
922 timevar_stop (TV_NAME_LOOKUP);
927 VEC_safe_push (tree, gc, local_names, decl);
928 timevar_stop (TV_NAME_LOOKUP);
931 /* Subroutine of duplicate_decls: return truthvalue of whether
932 or not types of these decls match.
934 For C++, we must compare the parameter list so that `int' can match
935 `int&' in a parameter position, but `int&' is not confused with
939 decls_match (tree newdecl, tree olddecl)
943 if (newdecl == olddecl)
946 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
947 /* If the two DECLs are not even the same kind of thing, we're not
948 interested in their types. */
951 if (TREE_CODE (newdecl) == FUNCTION_DECL)
953 tree f1 = TREE_TYPE (newdecl);
954 tree f2 = TREE_TYPE (olddecl);
955 tree p1 = TYPE_ARG_TYPES (f1);
956 tree p2 = TYPE_ARG_TYPES (f2);
958 /* Specializations of different templates are different functions
959 even if they have the same type. */
960 tree t1 = (DECL_USE_TEMPLATE (newdecl)
961 ? DECL_TI_TEMPLATE (newdecl)
963 tree t2 = (DECL_USE_TEMPLATE (olddecl)
964 ? DECL_TI_TEMPLATE (olddecl)
969 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
970 && ! (DECL_EXTERN_C_P (newdecl)
971 && DECL_EXTERN_C_P (olddecl)))
974 #ifdef NO_IMPLICIT_EXTERN_C
975 /* A new declaration doesn't match a built-in one unless it
976 is also extern "C". */
977 if (DECL_IS_BUILTIN (olddecl)
978 && DECL_EXTERN_C_P (olddecl) && !DECL_EXTERN_C_P (newdecl))
982 if (TREE_CODE (f1) != TREE_CODE (f2))
985 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
987 if (!prototype_p (f2) && DECL_EXTERN_C_P (olddecl)
988 && (DECL_BUILT_IN (olddecl)
989 #ifndef NO_IMPLICIT_EXTERN_C
990 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
991 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
995 types_match = self_promoting_args_p (p1);
996 if (p1 == void_list_node)
997 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
999 #ifndef NO_IMPLICIT_EXTERN_C
1000 else if (!prototype_p (f1)
1001 && (DECL_EXTERN_C_P (olddecl)
1002 && DECL_IN_SYSTEM_HEADER (olddecl)
1003 && !DECL_CLASS_SCOPE_P (olddecl))
1004 && (DECL_EXTERN_C_P (newdecl)
1005 && DECL_IN_SYSTEM_HEADER (newdecl)
1006 && !DECL_CLASS_SCOPE_P (newdecl)))
1008 types_match = self_promoting_args_p (p2);
1009 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
1015 && (TYPE_ATTRIBUTES (TREE_TYPE (newdecl)) == NULL_TREE
1016 || comp_type_attributes (TREE_TYPE (newdecl),
1017 TREE_TYPE (olddecl)) != 0);
1022 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1024 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
1025 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
1028 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1029 DECL_TEMPLATE_PARMS (olddecl)))
1032 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1033 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
1034 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
1036 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
1037 DECL_TEMPLATE_RESULT (newdecl));
1041 /* Need to check scope for variable declaration (VAR_DECL).
1042 For typedef (TYPE_DECL), scope is ignored. */
1043 if (TREE_CODE (newdecl) == VAR_DECL
1044 && CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
1046 Two declarations for an object with C language linkage
1047 with the same name (ignoring the namespace that qualify
1048 it) that appear in different namespace scopes refer to
1050 && !(DECL_EXTERN_C_P (olddecl) && DECL_EXTERN_C_P (newdecl)))
1053 if (TREE_TYPE (newdecl) == error_mark_node)
1054 types_match = TREE_TYPE (olddecl) == error_mark_node;
1055 else if (TREE_TYPE (olddecl) == NULL_TREE)
1056 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1057 else if (TREE_TYPE (newdecl) == NULL_TREE)
1060 types_match = comptypes (TREE_TYPE (newdecl),
1061 TREE_TYPE (olddecl),
1062 COMPARE_REDECLARATION);
1068 /* If NEWDECL is `static' and an `extern' was seen previously,
1069 warn about it. OLDDECL is the previous declaration.
1071 Note that this does not apply to the C++ case of declaring
1072 a variable `extern const' and then later `const'.
1074 Don't complain about built-in functions, since they are beyond
1075 the user's control. */
1078 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1080 if (TREE_CODE (newdecl) == TYPE_DECL
1081 || TREE_CODE (newdecl) == TEMPLATE_DECL
1082 || TREE_CODE (newdecl) == CONST_DECL
1083 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1086 /* Don't get confused by static member functions; that's a different
1088 if (TREE_CODE (newdecl) == FUNCTION_DECL
1089 && DECL_STATIC_FUNCTION_P (newdecl))
1092 /* If the old declaration was `static', or the new one isn't, then
1093 everything is OK. */
1094 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1097 /* It's OK to declare a builtin function as `static'. */
1098 if (TREE_CODE (olddecl) == FUNCTION_DECL
1099 && DECL_ARTIFICIAL (olddecl))
1102 permerror (input_location, "%qD was declared %<extern%> and later %<static%>", newdecl);
1103 permerror (input_location, "previous declaration of %q+D", olddecl);
1106 /* NEW_DECL is a redeclaration of OLD_DECL; both are functions or
1107 function templates. If their exception specifications do not
1108 match, issue a diagnostic. */
1111 check_redeclaration_exception_specification (tree new_decl,
1116 tree new_exceptions;
1117 tree old_exceptions;
1119 new_type = TREE_TYPE (new_decl);
1120 new_exceptions = TYPE_RAISES_EXCEPTIONS (new_type);
1121 old_type = TREE_TYPE (old_decl);
1122 old_exceptions = TYPE_RAISES_EXCEPTIONS (old_type);
1126 If any declaration of a function has an exception-specification,
1127 all declarations, including the definition and an explicit
1128 specialization, of that function shall have an
1129 exception-specification with the same set of type-ids. */
1130 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (old_decl))
1131 && ! DECL_IS_BUILTIN (old_decl)
1133 && !comp_except_specs (new_exceptions, old_exceptions, ce_normal))
1135 error ("declaration of %qF has a different exception specifier",
1137 error ("from previous declaration %q+F", old_decl);
1141 /* Return true if OLD_DECL and NEW_DECL agree on constexprness.
1142 Otherwise issue diagnostics. */
1145 validate_constexpr_redeclaration (tree old_decl, tree new_decl)
1147 old_decl = STRIP_TEMPLATE (old_decl);
1148 new_decl = STRIP_TEMPLATE (new_decl);
1149 if (!VAR_OR_FUNCTION_DECL_P (old_decl)
1150 || !VAR_OR_FUNCTION_DECL_P (new_decl))
1152 if (DECL_DECLARED_CONSTEXPR_P (old_decl)
1153 == DECL_DECLARED_CONSTEXPR_P (new_decl))
1155 if (TREE_CODE (old_decl) == FUNCTION_DECL && DECL_BUILT_IN (old_decl))
1157 /* Hide a built-in declaration. */
1158 DECL_DECLARED_CONSTEXPR_P (old_decl)
1159 = DECL_DECLARED_CONSTEXPR_P (new_decl);
1162 error ("redeclaration %qD differs in %<constexpr%>", new_decl);
1163 error ("from previous declaration %q+D", old_decl);
1167 #define GNU_INLINE_P(fn) (DECL_DECLARED_INLINE_P (fn) \
1168 && lookup_attribute ("gnu_inline", \
1169 DECL_ATTRIBUTES (fn)))
1171 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1172 If the redeclaration is invalid, a diagnostic is issued, and the
1173 error_mark_node is returned. Otherwise, OLDDECL is returned.
1175 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1178 NEWDECL_IS_FRIEND is true if NEWDECL was declared as a friend. */
1181 duplicate_decls (tree newdecl, tree olddecl, bool newdecl_is_friend)
1183 unsigned olddecl_uid = DECL_UID (olddecl);
1184 int olddecl_friend = 0, types_match = 0, hidden_friend = 0;
1185 int new_defines_function = 0;
1186 tree new_template_info;
1188 if (newdecl == olddecl)
1191 types_match = decls_match (newdecl, olddecl);
1193 /* If either the type of the new decl or the type of the old decl is an
1194 error_mark_node, then that implies that we have already issued an
1195 error (earlier) for some bogus type specification, and in that case,
1196 it is rather pointless to harass the user with yet more error message
1197 about the same declaration, so just pretend the types match here. */
1198 if (TREE_TYPE (newdecl) == error_mark_node
1199 || TREE_TYPE (olddecl) == error_mark_node)
1200 return error_mark_node;
1202 if (DECL_P (olddecl)
1203 && TREE_CODE (newdecl) == FUNCTION_DECL
1204 && TREE_CODE (olddecl) == FUNCTION_DECL
1205 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1207 if (DECL_DECLARED_INLINE_P (newdecl)
1208 && DECL_UNINLINABLE (newdecl)
1209 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1210 /* Already warned elsewhere. */;
1211 else if (DECL_DECLARED_INLINE_P (olddecl)
1212 && DECL_UNINLINABLE (olddecl)
1213 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1214 /* Already warned. */;
1215 else if (DECL_DECLARED_INLINE_P (newdecl)
1216 && DECL_UNINLINABLE (olddecl)
1217 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1219 warning (OPT_Wattributes, "function %q+D redeclared as inline",
1221 warning (OPT_Wattributes, "previous declaration of %q+D "
1222 "with attribute noinline", olddecl);
1224 else if (DECL_DECLARED_INLINE_P (olddecl)
1225 && DECL_UNINLINABLE (newdecl)
1226 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1228 warning (OPT_Wattributes, "function %q+D redeclared with "
1229 "attribute noinline", newdecl);
1230 warning (OPT_Wattributes, "previous declaration of %q+D was inline",
1235 /* Check for redeclaration and other discrepancies. */
1236 if (TREE_CODE (olddecl) == FUNCTION_DECL
1237 && DECL_ARTIFICIAL (olddecl))
1239 gcc_assert (!DECL_HIDDEN_FRIEND_P (olddecl));
1240 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1242 /* Avoid warnings redeclaring built-ins which have not been
1243 explicitly declared. */
1244 if (DECL_ANTICIPATED (olddecl))
1247 /* If you declare a built-in or predefined function name as static,
1248 the old definition is overridden, but optionally warn this was a
1249 bad choice of name. */
1250 if (! TREE_PUBLIC (newdecl))
1252 warning (OPT_Wshadow,
1253 DECL_BUILT_IN (olddecl)
1254 ? G_("shadowing built-in function %q#D")
1255 : G_("shadowing library function %q#D"), olddecl);
1256 /* Discard the old built-in function. */
1259 /* If the built-in is not ansi, then programs can override
1260 it even globally without an error. */
1261 else if (! DECL_BUILT_IN (olddecl))
1262 warning (0, "library function %q#D redeclared as non-function %q#D",
1266 error ("declaration of %q#D", newdecl);
1267 error ("conflicts with built-in declaration %q#D",
1272 else if (!types_match)
1274 /* Avoid warnings redeclaring built-ins which have not been
1275 explicitly declared. */
1276 if (DECL_ANTICIPATED (olddecl))
1278 /* Deal with fileptr_type_node. FILE type is not known
1279 at the time we create the builtins. */
1282 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1283 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1285 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1288 else if (TREE_VALUE (t2) == fileptr_type_node)
1290 tree t = TREE_VALUE (t1);
1292 if (TREE_CODE (t) == POINTER_TYPE
1293 && TYPE_NAME (TREE_TYPE (t))
1294 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1295 == get_identifier ("FILE")
1296 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1298 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1300 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1301 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1302 types_match = decls_match (newdecl, olddecl);
1304 return duplicate_decls (newdecl, olddecl,
1306 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1309 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1312 else if ((DECL_EXTERN_C_P (newdecl)
1313 && DECL_EXTERN_C_P (olddecl))
1314 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1315 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1317 /* A near match; override the builtin. */
1319 if (TREE_PUBLIC (newdecl))
1321 warning (0, "new declaration %q#D", newdecl);
1322 warning (0, "ambiguates built-in declaration %q#D",
1326 warning (OPT_Wshadow,
1327 DECL_BUILT_IN (olddecl)
1328 ? G_("shadowing built-in function %q#D")
1329 : G_("shadowing library function %q#D"), olddecl);
1332 /* Discard the old built-in function. */
1335 /* Replace the old RTL to avoid problems with inlining. */
1336 COPY_DECL_RTL (newdecl, olddecl);
1338 /* Even if the types match, prefer the new declarations type for
1339 built-ins which have not been explicitly declared, for
1340 exception lists, etc... */
1341 else if (DECL_IS_BUILTIN (olddecl))
1343 tree type = TREE_TYPE (newdecl);
1344 tree attribs = (*targetm.merge_type_attributes)
1345 (TREE_TYPE (olddecl), type);
1347 type = cp_build_type_attribute_variant (type, attribs);
1348 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1351 /* If a function is explicitly declared "throw ()", propagate that to
1352 the corresponding builtin. */
1353 if (DECL_BUILT_IN_CLASS (olddecl) == BUILT_IN_NORMAL
1354 && DECL_ANTICIPATED (olddecl)
1355 && TREE_NOTHROW (newdecl)
1356 && !TREE_NOTHROW (olddecl)
1357 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != NULL_TREE
1358 && built_in_decls [DECL_FUNCTION_CODE (olddecl)] != olddecl
1360 TREE_NOTHROW (built_in_decls [DECL_FUNCTION_CODE (olddecl)]) = 1;
1362 /* Whether or not the builtin can throw exceptions has no
1363 bearing on this declarator. */
1364 TREE_NOTHROW (olddecl) = 0;
1366 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1368 /* If a builtin function is redeclared as `static', merge
1369 the declarations, but make the original one static. */
1370 DECL_THIS_STATIC (olddecl) = 1;
1371 TREE_PUBLIC (olddecl) = 0;
1373 /* Make the old declaration consistent with the new one so
1374 that all remnants of the builtin-ness of this function
1375 will be banished. */
1376 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1377 COPY_DECL_RTL (newdecl, olddecl);
1380 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1382 /* C++ Standard, 3.3, clause 4:
1383 "[Note: a namespace name or a class template name must be unique
1384 in its declarative region (7.3.2, clause 14). ]" */
1385 if (TREE_CODE (olddecl) != NAMESPACE_DECL
1386 && TREE_CODE (newdecl) != NAMESPACE_DECL
1387 && (TREE_CODE (olddecl) != TEMPLATE_DECL
1388 || TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) != TYPE_DECL)
1389 && (TREE_CODE (newdecl) != TEMPLATE_DECL
1390 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != TYPE_DECL))
1392 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1393 && TREE_CODE (newdecl) != TYPE_DECL)
1394 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1395 && TREE_CODE (olddecl) != TYPE_DECL))
1397 /* We do nothing special here, because C++ does such nasty
1398 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1399 get shadowed, and know that if we need to find a TYPE_DECL
1400 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1401 slot of the identifier. */
1405 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1406 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1407 || (TREE_CODE (olddecl) == FUNCTION_DECL
1408 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1412 error ("%q#D redeclared as different kind of symbol", newdecl);
1413 if (TREE_CODE (olddecl) == TREE_LIST)
1414 olddecl = TREE_VALUE (olddecl);
1415 error ("previous declaration of %q+#D", olddecl);
1417 return error_mark_node;
1419 else if (!types_match)
1421 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1422 /* These are certainly not duplicate declarations; they're
1423 from different scopes. */
1426 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1428 /* The name of a class template may not be declared to refer to
1429 any other template, class, function, object, namespace, value,
1430 or type in the same scope. */
1431 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1432 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1434 error ("declaration of template %q#D", newdecl);
1435 error ("conflicts with previous declaration %q+#D", olddecl);
1437 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1438 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1439 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1440 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1441 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1442 DECL_TEMPLATE_PARMS (olddecl))
1443 /* Template functions can be disambiguated by
1445 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1446 TREE_TYPE (TREE_TYPE (olddecl))))
1448 error ("new declaration %q#D", newdecl);
1449 error ("ambiguates old declaration %q+#D", olddecl);
1453 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1455 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1457 error ("declaration of C function %q#D conflicts with",
1459 error ("previous declaration %q+#D here", olddecl);
1462 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1463 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1465 error ("new declaration %q#D", newdecl);
1466 error ("ambiguates old declaration %q+#D", olddecl);
1467 return error_mark_node;
1474 error ("conflicting declaration %q#D", newdecl);
1475 error ("%q+D has a previous declaration as %q#D", olddecl, olddecl);
1476 return error_mark_node;
1479 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1480 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1481 && (!DECL_TEMPLATE_INFO (newdecl)
1482 || (DECL_TI_TEMPLATE (newdecl)
1483 != DECL_TI_TEMPLATE (olddecl))))
1484 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1485 && (!DECL_TEMPLATE_INFO (olddecl)
1486 || (DECL_TI_TEMPLATE (olddecl)
1487 != DECL_TI_TEMPLATE (newdecl))))))
1488 /* It's OK to have a template specialization and a non-template
1489 with the same type, or to have specializations of two
1490 different templates with the same type. Note that if one is a
1491 specialization, and the other is an instantiation of the same
1492 template, that we do not exit at this point. That situation
1493 can occur if we instantiate a template class, and then
1494 specialize one of its methods. This situation is valid, but
1495 the declarations must be merged in the usual way. */
1497 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1498 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1499 && !DECL_USE_TEMPLATE (newdecl))
1500 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1501 && !DECL_USE_TEMPLATE (olddecl))))
1502 /* One of the declarations is a template instantiation, and the
1503 other is not a template at all. That's OK. */
1505 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1507 /* In [namespace.alias] we have:
1509 In a declarative region, a namespace-alias-definition can be
1510 used to redefine a namespace-alias declared in that declarative
1511 region to refer only to the namespace to which it already
1514 Therefore, if we encounter a second alias directive for the same
1515 alias, we can just ignore the second directive. */
1516 if (DECL_NAMESPACE_ALIAS (newdecl)
1517 && (DECL_NAMESPACE_ALIAS (newdecl)
1518 == DECL_NAMESPACE_ALIAS (olddecl)))
1520 /* [namespace.alias]
1522 A namespace-name or namespace-alias shall not be declared as
1523 the name of any other entity in the same declarative region.
1524 A namespace-name defined at global scope shall not be
1525 declared as the name of any other entity in any global scope
1527 error ("declaration of namespace %qD conflicts with", newdecl);
1528 error ("previous declaration of namespace %q+D here", olddecl);
1529 return error_mark_node;
1533 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1536 error_at (DECL_SOURCE_LOCATION (newdecl), errmsg, newdecl);
1537 if (DECL_NAME (olddecl) != NULL_TREE)
1538 error ((DECL_INITIAL (olddecl) && namespace_bindings_p ())
1539 ? "%q+#D previously defined here"
1540 : "%q+#D previously declared here", olddecl);
1541 return error_mark_node;
1543 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1544 && DECL_INITIAL (olddecl) != NULL_TREE
1545 && !prototype_p (TREE_TYPE (olddecl))
1546 && prototype_p (TREE_TYPE (newdecl)))
1548 /* Prototype decl follows defn w/o prototype. */
1549 warning_at (input_location, 0, "prototype for %q+#D", newdecl);
1550 warning_at (DECL_SOURCE_LOCATION (olddecl), 0,
1551 "follows non-prototype definition here");
1553 else if ((TREE_CODE (olddecl) == FUNCTION_DECL
1554 || TREE_CODE (olddecl) == VAR_DECL)
1555 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1558 If two declarations of the same function or object
1559 specify different linkage-specifications ..., the program
1560 is ill-formed.... Except for functions with C++ linkage,
1561 a function declaration without a linkage specification
1562 shall not precede the first linkage specification for
1563 that function. A function can be declared without a
1564 linkage specification after an explicit linkage
1565 specification has been seen; the linkage explicitly
1566 specified in the earlier declaration is not affected by
1567 such a function declaration.
1569 DR 563 raises the question why the restrictions on
1570 functions should not also apply to objects. Older
1571 versions of G++ silently ignore the linkage-specification
1579 which is clearly wrong. Therefore, we now treat objects
1581 if (current_lang_depth () == 0)
1583 /* There is no explicit linkage-specification, so we use
1584 the linkage from the previous declaration. */
1585 if (!DECL_LANG_SPECIFIC (newdecl))
1586 retrofit_lang_decl (newdecl);
1587 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1591 error ("previous declaration of %q+#D with %qL linkage",
1592 olddecl, DECL_LANGUAGE (olddecl));
1593 error ("conflicts with new declaration with %qL linkage",
1594 DECL_LANGUAGE (newdecl));
1598 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1600 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1602 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1603 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1606 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1607 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1609 for (; t1 && t1 != void_list_node;
1610 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1611 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1613 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1616 permerror (input_location, "default argument given for parameter %d of %q#D",
1618 permerror (input_location, "after previous specification in %q+#D", olddecl);
1622 error ("default argument given for parameter %d of %q#D",
1624 error ("after previous specification in %q+#D",
1631 /* Do not merge an implicit typedef with an explicit one. In:
1635 typedef class A A __attribute__ ((foo));
1637 the attribute should apply only to the typedef. */
1638 if (TREE_CODE (olddecl) == TYPE_DECL
1639 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1640 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1643 /* If new decl is `static' and an `extern' was seen previously,
1645 warn_extern_redeclared_static (newdecl, olddecl);
1647 if (!validate_constexpr_redeclaration (olddecl, newdecl))
1648 return error_mark_node;
1650 /* We have committed to returning 1 at this point. */
1651 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1653 /* Now that functions must hold information normally held
1654 by field decls, there is extra work to do so that
1655 declaration information does not get destroyed during
1657 if (DECL_VINDEX (olddecl))
1658 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1659 if (DECL_CONTEXT (olddecl))
1660 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1661 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1662 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1663 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1664 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1665 DECL_INVALID_OVERRIDER_P (newdecl) |= DECL_INVALID_OVERRIDER_P (olddecl);
1666 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1667 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1668 SET_OVERLOADED_OPERATOR_CODE
1669 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1670 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1672 /* Optionally warn about more than one declaration for the same
1673 name, but don't warn about a function declaration followed by a
1675 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1676 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1677 /* Don't warn about extern decl followed by definition. */
1678 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1679 /* Don't warn about friends, let add_friend take care of it. */
1680 && ! (newdecl_is_friend || DECL_FRIEND_P (olddecl)))
1682 warning (OPT_Wredundant_decls, "redundant redeclaration of %qD in same scope", newdecl);
1683 warning (OPT_Wredundant_decls, "previous declaration of %q+D", olddecl);
1686 if (DECL_DELETED_FN (newdecl))
1688 error ("deleted definition of %qD", newdecl);
1689 error ("after previous declaration %q+D", olddecl);
1693 /* Deal with C++: must preserve virtual function table size. */
1694 if (TREE_CODE (olddecl) == TYPE_DECL)
1696 tree newtype = TREE_TYPE (newdecl);
1697 tree oldtype = TREE_TYPE (olddecl);
1699 if (newtype != error_mark_node && oldtype != error_mark_node
1700 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1701 CLASSTYPE_FRIEND_CLASSES (newtype)
1702 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1704 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1707 /* Copy all the DECL_... slots specified in the new decl
1708 except for any that we copy here from the old type. */
1709 DECL_ATTRIBUTES (newdecl)
1710 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1712 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1716 old_result = DECL_TEMPLATE_RESULT (olddecl);
1717 new_result = DECL_TEMPLATE_RESULT (newdecl);
1718 TREE_TYPE (olddecl) = TREE_TYPE (old_result);
1719 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1720 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1721 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1723 DECL_ATTRIBUTES (old_result)
1724 = (*targetm.merge_decl_attributes) (old_result, new_result);
1726 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1728 if (GNU_INLINE_P (old_result) != GNU_INLINE_P (new_result)
1729 && DECL_INITIAL (new_result))
1731 if (DECL_INITIAL (old_result))
1732 DECL_UNINLINABLE (old_result) = 1;
1734 DECL_UNINLINABLE (old_result) = DECL_UNINLINABLE (new_result);
1735 DECL_EXTERNAL (old_result) = DECL_EXTERNAL (new_result);
1736 DECL_NOT_REALLY_EXTERN (old_result)
1737 = DECL_NOT_REALLY_EXTERN (new_result);
1738 DECL_INTERFACE_KNOWN (old_result)
1739 = DECL_INTERFACE_KNOWN (new_result);
1740 DECL_DECLARED_INLINE_P (old_result)
1741 = DECL_DECLARED_INLINE_P (new_result);
1742 DECL_DISREGARD_INLINE_LIMITS (old_result)
1743 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1748 DECL_DECLARED_INLINE_P (old_result)
1749 |= DECL_DECLARED_INLINE_P (new_result);
1750 DECL_DISREGARD_INLINE_LIMITS (old_result)
1751 |= DECL_DISREGARD_INLINE_LIMITS (new_result);
1752 check_redeclaration_exception_specification (newdecl, olddecl);
1756 /* If the new declaration is a definition, update the file and
1757 line information on the declaration, and also make
1758 the old declaration the same definition. */
1759 if (DECL_INITIAL (new_result) != NULL_TREE)
1761 DECL_SOURCE_LOCATION (olddecl)
1762 = DECL_SOURCE_LOCATION (old_result)
1763 = DECL_SOURCE_LOCATION (newdecl);
1764 DECL_INITIAL (old_result) = DECL_INITIAL (new_result);
1765 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1768 DECL_ARGUMENTS (old_result)
1769 = DECL_ARGUMENTS (new_result);
1770 for (parm = DECL_ARGUMENTS (old_result); parm;
1771 parm = DECL_CHAIN (parm))
1772 DECL_CONTEXT (parm) = old_result;
1781 /* Automatically handles default parameters. */
1782 tree oldtype = TREE_TYPE (olddecl);
1785 /* Merge the data types specified in the two decls. */
1786 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1788 /* If merge_types produces a non-typedef type, just use the old type. */
1789 if (TREE_CODE (newdecl) == TYPE_DECL
1790 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1793 if (TREE_CODE (newdecl) == VAR_DECL)
1795 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1796 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1797 DECL_NONTRIVIALLY_INITIALIZED_P (newdecl)
1798 |= DECL_NONTRIVIALLY_INITIALIZED_P (olddecl);
1799 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1800 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1802 /* Merge the threadprivate attribute from OLDDECL into NEWDECL. */
1803 if (DECL_LANG_SPECIFIC (olddecl)
1804 && CP_DECL_THREADPRIVATE_P (olddecl))
1806 /* Allocate a LANG_SPECIFIC structure for NEWDECL, if needed. */
1807 if (!DECL_LANG_SPECIFIC (newdecl))
1808 retrofit_lang_decl (newdecl);
1810 DECL_TLS_MODEL (newdecl) = DECL_TLS_MODEL (olddecl);
1811 CP_DECL_THREADPRIVATE_P (newdecl) = 1;
1815 /* Do this after calling `merge_types' so that default
1816 parameters don't confuse us. */
1817 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1818 check_redeclaration_exception_specification (newdecl, olddecl);
1819 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1821 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1822 check_default_args (newdecl);
1824 /* Lay the type out, unless already done. */
1825 if (! same_type_p (newtype, oldtype)
1826 && TREE_TYPE (newdecl) != error_mark_node
1827 && !(processing_template_decl && uses_template_parms (newdecl)))
1828 layout_type (TREE_TYPE (newdecl));
1830 if ((TREE_CODE (newdecl) == VAR_DECL
1831 || TREE_CODE (newdecl) == PARM_DECL
1832 || TREE_CODE (newdecl) == RESULT_DECL
1833 || TREE_CODE (newdecl) == FIELD_DECL
1834 || TREE_CODE (newdecl) == TYPE_DECL)
1835 && !(processing_template_decl && uses_template_parms (newdecl)))
1836 layout_decl (newdecl, 0);
1838 /* Merge the type qualifiers. */
1839 if (TREE_READONLY (newdecl))
1840 TREE_READONLY (olddecl) = 1;
1841 if (TREE_THIS_VOLATILE (newdecl))
1842 TREE_THIS_VOLATILE (olddecl) = 1;
1843 if (TREE_NOTHROW (newdecl))
1844 TREE_NOTHROW (olddecl) = 1;
1846 /* Merge deprecatedness. */
1847 if (TREE_DEPRECATED (newdecl))
1848 TREE_DEPRECATED (olddecl) = 1;
1850 /* Preserve function specific target and optimization options */
1851 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1853 if (DECL_FUNCTION_SPECIFIC_TARGET (olddecl)
1854 && !DECL_FUNCTION_SPECIFIC_TARGET (newdecl))
1855 DECL_FUNCTION_SPECIFIC_TARGET (newdecl)
1856 = DECL_FUNCTION_SPECIFIC_TARGET (olddecl);
1858 if (DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl)
1859 && !DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl))
1860 DECL_FUNCTION_SPECIFIC_OPTIMIZATION (newdecl)
1861 = DECL_FUNCTION_SPECIFIC_OPTIMIZATION (olddecl);
1864 /* Merge the initialization information. */
1865 if (DECL_INITIAL (newdecl) == NULL_TREE
1866 && DECL_INITIAL (olddecl) != NULL_TREE)
1868 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1869 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1870 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1872 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1873 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1877 /* Merge the section attribute.
1878 We want to issue an error if the sections conflict but that must be
1879 done later in decl_attributes since we are called before attributes
1881 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1882 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1884 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1886 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1887 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1888 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1889 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1890 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1891 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1892 DECL_IS_OPERATOR_NEW (newdecl) |= DECL_IS_OPERATOR_NEW (olddecl);
1893 DECL_PURE_P (newdecl) |= DECL_PURE_P (olddecl);
1894 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1895 DECL_LOOPING_CONST_OR_PURE_P (newdecl)
1896 |= DECL_LOOPING_CONST_OR_PURE_P (olddecl);
1897 /* Keep the old RTL. */
1898 COPY_DECL_RTL (olddecl, newdecl);
1900 else if (TREE_CODE (newdecl) == VAR_DECL
1901 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1903 /* Keep the old RTL. We cannot keep the old RTL if the old
1904 declaration was for an incomplete object and the new
1905 declaration is not since many attributes of the RTL will
1907 COPY_DECL_RTL (olddecl, newdecl);
1910 /* If cannot merge, then use the new type and qualifiers,
1911 and don't preserve the old rtl. */
1914 /* Clean out any memory we had of the old declaration. */
1915 tree oldstatic = value_member (olddecl, static_aggregates);
1917 TREE_VALUE (oldstatic) = error_mark_node;
1919 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1920 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1921 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1922 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1925 /* Merge the storage class information. */
1926 merge_weak (newdecl, olddecl);
1928 if (DECL_ONE_ONLY (olddecl))
1929 DECL_COMDAT_GROUP (newdecl) = DECL_COMDAT_GROUP (olddecl);
1931 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1932 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1933 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1934 if (! DECL_EXTERNAL (olddecl))
1935 DECL_EXTERNAL (newdecl) = 0;
1937 new_template_info = NULL_TREE;
1938 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1940 bool new_redefines_gnu_inline = false;
1942 if (new_defines_function
1943 && ((DECL_INTERFACE_KNOWN (olddecl)
1944 && TREE_CODE (olddecl) == FUNCTION_DECL)
1945 || (TREE_CODE (olddecl) == TEMPLATE_DECL
1946 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1947 == FUNCTION_DECL))))
1951 if (TREE_CODE (fn) == TEMPLATE_DECL)
1952 fn = DECL_TEMPLATE_RESULT (olddecl);
1954 new_redefines_gnu_inline = GNU_INLINE_P (fn) && DECL_INITIAL (fn);
1957 if (!new_redefines_gnu_inline)
1959 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1960 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1961 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1963 DECL_TEMPLATE_INSTANTIATED (newdecl)
1964 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1965 DECL_ODR_USED (newdecl) |= DECL_ODR_USED (olddecl);
1967 /* If the OLDDECL is an instantiation and/or specialization,
1968 then the NEWDECL must be too. But, it may not yet be marked
1969 as such if the caller has created NEWDECL, but has not yet
1970 figured out that it is a redeclaration. */
1971 if (!DECL_USE_TEMPLATE (newdecl))
1972 DECL_USE_TEMPLATE (newdecl) = DECL_USE_TEMPLATE (olddecl);
1974 /* Don't really know how much of the language-specific
1975 values we should copy from old to new. */
1976 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1977 DECL_REPO_AVAILABLE_P (newdecl) = DECL_REPO_AVAILABLE_P (olddecl);
1978 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1979 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1981 if (LANG_DECL_HAS_MIN (newdecl))
1983 DECL_LANG_SPECIFIC (newdecl)->u.min.u2 =
1984 DECL_LANG_SPECIFIC (olddecl)->u.min.u2;
1985 if (DECL_TEMPLATE_INFO (newdecl))
1986 new_template_info = DECL_TEMPLATE_INFO (newdecl);
1987 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1989 /* Only functions have these fields. */
1990 if (TREE_CODE (newdecl) == FUNCTION_DECL
1991 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1993 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1994 olddecl_friend = DECL_FRIEND_P (olddecl);
1995 hidden_friend = (DECL_ANTICIPATED (olddecl)
1996 && DECL_HIDDEN_FRIEND_P (olddecl)
1997 && newdecl_is_friend);
1998 DECL_BEFRIENDING_CLASSES (newdecl)
1999 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
2000 DECL_BEFRIENDING_CLASSES (olddecl));
2001 /* DECL_THUNKS is only valid for virtual functions,
2002 otherwise it is a DECL_FRIEND_CONTEXT. */
2003 if (DECL_VIRTUAL_P (newdecl))
2004 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
2006 /* Only variables have this field. */
2007 else if (TREE_CODE (newdecl) == VAR_DECL
2008 && VAR_HAD_UNKNOWN_BOUND (olddecl))
2009 SET_VAR_HAD_UNKNOWN_BOUND (newdecl);
2012 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2016 /* Merge parameter attributes. */
2017 tree oldarg, newarg;
2018 for (oldarg = DECL_ARGUMENTS(olddecl),
2019 newarg = DECL_ARGUMENTS(newdecl);
2021 oldarg = DECL_CHAIN(oldarg), newarg = DECL_CHAIN(newarg)) {
2022 DECL_ATTRIBUTES (newarg)
2023 = (*targetm.merge_decl_attributes) (oldarg, newarg);
2024 DECL_ATTRIBUTES (oldarg) = DECL_ATTRIBUTES (newarg);
2027 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
2028 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
2030 /* If newdecl is not a specialization, then it is not a
2031 template-related function at all. And that means that we
2032 should have exited above, returning 0. */
2033 gcc_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl));
2035 if (DECL_ODR_USED (olddecl))
2036 /* From [temp.expl.spec]:
2038 If a template, a member template or the member of a class
2039 template is explicitly specialized then that
2040 specialization shall be declared before the first use of
2041 that specialization that would cause an implicit
2042 instantiation to take place, in every translation unit in
2043 which such a use occurs. */
2044 error ("explicit specialization of %qD after first use",
2047 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
2049 /* Don't propagate visibility from the template to the
2050 specialization here. We'll do that in determine_visibility if
2052 DECL_VISIBILITY_SPECIFIED (olddecl) = 0;
2054 /* [temp.expl.spec/14] We don't inline explicit specialization
2055 just because the primary template says so. */
2057 /* But still keep DECL_DISREGARD_INLINE_LIMITS in sync with
2058 the always_inline attribute. */
2059 if (DECL_DISREGARD_INLINE_LIMITS (olddecl)
2060 && !DECL_DISREGARD_INLINE_LIMITS (newdecl))
2062 if (DECL_DECLARED_INLINE_P (newdecl))
2063 DECL_DISREGARD_INLINE_LIMITS (newdecl) = true;
2065 DECL_ATTRIBUTES (newdecl)
2066 = remove_attribute ("always_inline",
2067 DECL_ATTRIBUTES (newdecl));
2070 else if (new_defines_function && DECL_INITIAL (olddecl))
2072 /* Never inline re-defined extern inline functions.
2073 FIXME: this could be better handled by keeping both
2074 function as separate declarations. */
2075 DECL_UNINLINABLE (newdecl) = 1;
2079 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
2080 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
2082 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
2084 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
2085 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
2087 DECL_DISREGARD_INLINE_LIMITS (newdecl)
2088 = DECL_DISREGARD_INLINE_LIMITS (olddecl)
2089 = (DECL_DISREGARD_INLINE_LIMITS (newdecl)
2090 || DECL_DISREGARD_INLINE_LIMITS (olddecl));
2093 /* Preserve abstractness on cloned [cd]tors. */
2094 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
2096 /* Update newdecl's parms to point at olddecl. */
2097 for (parm = DECL_ARGUMENTS (newdecl); parm;
2098 parm = DECL_CHAIN (parm))
2099 DECL_CONTEXT (parm) = olddecl;
2103 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
2104 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
2105 COPY_DECL_RTL (newdecl, olddecl);
2107 if (! types_match || new_defines_function)
2109 /* These need to be copied so that the names are available.
2110 Note that if the types do match, we'll preserve inline
2111 info and other bits, but if not, we won't. */
2112 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
2113 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
2115 if (new_defines_function)
2116 /* If defining a function declared with other language
2117 linkage, use the previously declared language linkage. */
2118 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
2119 else if (types_match)
2121 /* If redeclaring a builtin function, and not a definition,
2122 it stays built in. */
2123 if (DECL_BUILT_IN (olddecl))
2125 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
2126 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
2127 /* If we're keeping the built-in definition, keep the rtl,
2128 regardless of declaration matches. */
2129 COPY_DECL_RTL (olddecl, newdecl);
2132 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
2133 /* Don't clear out the arguments if we're just redeclaring a
2135 if (DECL_ARGUMENTS (olddecl))
2136 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
2139 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
2140 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
2142 /* Now preserve various other info from the definition. */
2143 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
2144 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
2145 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
2146 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
2148 /* Warn about conflicting visibility specifications. */
2149 if (DECL_VISIBILITY_SPECIFIED (olddecl)
2150 && DECL_VISIBILITY_SPECIFIED (newdecl)
2151 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
2153 warning_at (input_location, OPT_Wattributes,
2154 "%q+D: visibility attribute ignored because it", newdecl);
2155 warning_at (DECL_SOURCE_LOCATION (olddecl), OPT_Wattributes,
2156 "conflicts with previous declaration here");
2158 /* Choose the declaration which specified visibility. */
2159 if (DECL_VISIBILITY_SPECIFIED (olddecl))
2161 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
2162 DECL_VISIBILITY_SPECIFIED (newdecl) = 1;
2164 /* Init priority used to be merged from newdecl to olddecl by the memcpy,
2165 so keep this behavior. */
2166 if (TREE_CODE (newdecl) == VAR_DECL && DECL_HAS_INIT_PRIORITY_P (newdecl))
2168 SET_DECL_INIT_PRIORITY (olddecl, DECL_INIT_PRIORITY (newdecl));
2169 DECL_HAS_INIT_PRIORITY_P (olddecl) = 1;
2171 /* Likewise for DECL_USER_ALIGN and DECL_PACKED. */
2172 DECL_USER_ALIGN (olddecl) = DECL_USER_ALIGN (newdecl);
2173 if (TREE_CODE (newdecl) == FIELD_DECL)
2174 DECL_PACKED (olddecl) = DECL_PACKED (newdecl);
2176 /* The DECL_LANG_SPECIFIC information in OLDDECL will be replaced
2177 with that from NEWDECL below. */
2178 if (DECL_LANG_SPECIFIC (olddecl))
2180 gcc_assert (DECL_LANG_SPECIFIC (olddecl)
2181 != DECL_LANG_SPECIFIC (newdecl));
2182 ggc_free (DECL_LANG_SPECIFIC (olddecl));
2185 /* Merge the USED information. */
2186 if (TREE_USED (olddecl))
2187 TREE_USED (newdecl) = 1;
2188 else if (TREE_USED (newdecl))
2189 TREE_USED (olddecl) = 1;
2190 if (TREE_CODE (newdecl) == VAR_DECL)
2192 if (DECL_READ_P (olddecl))
2193 DECL_READ_P (newdecl) = 1;
2194 else if (DECL_READ_P (newdecl))
2195 DECL_READ_P (olddecl) = 1;
2197 if (DECL_PRESERVE_P (olddecl))
2198 DECL_PRESERVE_P (newdecl) = 1;
2199 else if (DECL_PRESERVE_P (newdecl))
2200 DECL_PRESERVE_P (olddecl) = 1;
2202 if (TREE_CODE (newdecl) == FUNCTION_DECL)
2206 function_size = sizeof (struct tree_decl_common);
2208 memcpy ((char *) olddecl + sizeof (struct tree_common),
2209 (char *) newdecl + sizeof (struct tree_common),
2210 function_size - sizeof (struct tree_common));
2212 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2213 (char *) newdecl + sizeof (struct tree_decl_common),
2214 sizeof (struct tree_function_decl) - sizeof (struct tree_decl_common));
2215 if (new_template_info)
2216 /* If newdecl is a template instantiation, it is possible that
2217 the following sequence of events has occurred:
2219 o A friend function was declared in a class template. The
2220 class template was instantiated.
2222 o The instantiation of the friend declaration was
2223 recorded on the instantiation list, and is newdecl.
2225 o Later, however, instantiate_class_template called pushdecl
2226 on the newdecl to perform name injection. But, pushdecl in
2227 turn called duplicate_decls when it discovered that another
2228 declaration of a global function with the same name already
2231 o Here, in duplicate_decls, we decided to clobber newdecl.
2233 If we're going to do that, we'd better make sure that
2234 olddecl, and not newdecl, is on the list of
2235 instantiations so that if we try to do the instantiation
2236 again we won't get the clobbered declaration. */
2237 reregister_specialization (newdecl,
2243 size_t size = tree_code_size (TREE_CODE (olddecl));
2244 memcpy ((char *) olddecl + sizeof (struct tree_common),
2245 (char *) newdecl + sizeof (struct tree_common),
2246 sizeof (struct tree_decl_common) - sizeof (struct tree_common));
2247 switch (TREE_CODE (olddecl))
2257 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2258 (char *) newdecl + sizeof (struct tree_decl_common),
2259 size - sizeof (struct tree_decl_common)
2260 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2264 memcpy ((char *) olddecl + sizeof (struct tree_decl_common),
2265 (char *) newdecl + sizeof (struct tree_decl_common),
2266 sizeof (struct tree_decl_non_common) - sizeof (struct tree_decl_common)
2267 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
2271 DECL_UID (olddecl) = olddecl_uid;
2273 DECL_FRIEND_P (olddecl) = 1;
2276 DECL_ANTICIPATED (olddecl) = 1;
2277 DECL_HIDDEN_FRIEND_P (olddecl) = 1;
2280 /* NEWDECL contains the merged attribute lists.
2281 Update OLDDECL to be the same. */
2282 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
2284 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
2285 so that encode_section_info has a chance to look at the new decl
2286 flags and attributes. */
2287 if (DECL_RTL_SET_P (olddecl)
2288 && (TREE_CODE (olddecl) == FUNCTION_DECL
2289 || (TREE_CODE (olddecl) == VAR_DECL
2290 && TREE_STATIC (olddecl))))
2291 make_decl_rtl (olddecl);
2293 /* The NEWDECL will no longer be needed. Because every out-of-class
2294 declaration of a member results in a call to duplicate_decls,
2295 freeing these nodes represents in a significant savings. */
2301 /* Return zero if the declaration NEWDECL is valid
2302 when the declaration OLDDECL (assumed to be for the same name)
2303 has already been seen.
2304 Otherwise return an error message format string with a %s
2305 where the identifier should go. */
2308 redeclaration_error_message (tree newdecl, tree olddecl)
2310 if (TREE_CODE (newdecl) == TYPE_DECL)
2312 /* Because C++ can put things into name space for free,
2313 constructs like "typedef struct foo { ... } foo"
2314 would look like an erroneous redeclaration. */
2315 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
2318 return G_("redefinition of %q#D");
2320 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
2322 /* If this is a pure function, its olddecl will actually be
2323 the original initialization to `0' (which we force to call
2324 abort()). Don't complain about redefinition in this case. */
2325 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl)
2326 && DECL_INITIAL (olddecl) == NULL_TREE)
2329 /* If both functions come from different namespaces, this is not
2330 a redeclaration - this is a conflict with a used function. */
2331 if (DECL_NAMESPACE_SCOPE_P (olddecl)
2332 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl)
2333 && ! decls_match (olddecl, newdecl))
2334 return G_("%qD conflicts with used function");
2336 /* We'll complain about linkage mismatches in
2337 warn_extern_redeclared_static. */
2339 /* Defining the same name twice is no good. */
2340 if (DECL_INITIAL (olddecl) != NULL_TREE
2341 && DECL_INITIAL (newdecl) != NULL_TREE)
2343 if (DECL_NAME (olddecl) == NULL_TREE)
2344 return G_("%q#D not declared in class");
2345 else if (!GNU_INLINE_P (olddecl)
2346 || GNU_INLINE_P (newdecl))
2347 return G_("redefinition of %q#D");
2350 if (DECL_DECLARED_INLINE_P (olddecl) && DECL_DECLARED_INLINE_P (newdecl))
2352 bool olda = GNU_INLINE_P (olddecl);
2353 bool newa = GNU_INLINE_P (newdecl);
2358 return G_("%q+D redeclared inline with "
2359 "%<gnu_inline%> attribute");
2361 return G_("%q+D redeclared inline without "
2362 "%<gnu_inline%> attribute");
2368 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
2372 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
2374 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
2375 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
2376 return G_("redefinition of %q#D");
2380 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2381 || (DECL_TEMPLATE_RESULT (newdecl)
2382 == DECL_TEMPLATE_RESULT (olddecl)))
2385 nt = DECL_TEMPLATE_RESULT (newdecl);
2386 if (DECL_TEMPLATE_INFO (nt))
2387 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2388 ot = DECL_TEMPLATE_RESULT (olddecl);
2389 if (DECL_TEMPLATE_INFO (ot))
2390 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2391 if (DECL_INITIAL (nt) && DECL_INITIAL (ot)
2392 && (!GNU_INLINE_P (ot) || GNU_INLINE_P (nt)))
2393 return G_("redefinition of %q#D");
2395 if (DECL_DECLARED_INLINE_P (ot) && DECL_DECLARED_INLINE_P (nt))
2397 bool olda = GNU_INLINE_P (ot);
2398 bool newa = GNU_INLINE_P (nt);
2403 return G_("%q+D redeclared inline with "
2404 "%<gnu_inline%> attribute");
2406 return G_("%q+D redeclared inline without "
2407 "%<gnu_inline%> attribute");
2411 /* Core issue #226 (C++0x):
2413 If a friend function template declaration specifies a
2414 default template-argument, that declaration shall be a
2415 definition and shall be the only declaration of the
2416 function template in the translation unit. */
2417 if ((cxx_dialect != cxx98)
2418 && TREE_CODE (ot) == FUNCTION_DECL && DECL_FRIEND_P (ot)
2419 && !check_default_tmpl_args (nt, DECL_TEMPLATE_PARMS (newdecl),
2420 /*is_primary=*/1, /*is_partial=*/0,
2421 /*is_friend_decl=*/2))
2422 return G_("redeclaration of friend %q#D "
2423 "may not have default template arguments");
2427 else if (TREE_CODE (newdecl) == VAR_DECL
2428 && DECL_THREAD_LOCAL_P (newdecl) != DECL_THREAD_LOCAL_P (olddecl)
2429 && (! DECL_LANG_SPECIFIC (olddecl)
2430 || ! CP_DECL_THREADPRIVATE_P (olddecl)
2431 || DECL_THREAD_LOCAL_P (newdecl)))
2433 /* Only variables can be thread-local, and all declarations must
2434 agree on this property. */
2435 if (DECL_THREAD_LOCAL_P (newdecl))
2436 return G_("thread-local declaration of %q#D follows "
2437 "non-thread-local declaration");
2439 return G_("non-thread-local declaration of %q#D follows "
2440 "thread-local declaration");
2442 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2444 /* The objects have been declared at namespace scope. If either
2445 is a member of an anonymous union, then this is an invalid
2446 redeclaration. For example:
2452 if ((TREE_CODE (newdecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (newdecl))
2453 || (TREE_CODE (olddecl) == VAR_DECL && DECL_ANON_UNION_VAR_P (olddecl)))
2454 return G_("redeclaration of %q#D");
2455 /* If at least one declaration is a reference, there is no
2456 conflict. For example:
2462 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2464 /* Reject two definitions. */
2465 return G_("redefinition of %q#D");
2469 /* Objects declared with block scope: */
2470 /* Reject two definitions, and reject a definition
2471 together with an external reference. */
2472 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2473 return G_("redeclaration of %q#D");
2478 /* Hash and equality functions for the named_label table. */
2481 named_label_entry_hash (const void *data)
2483 const struct named_label_entry *ent = (const struct named_label_entry *) data;
2484 return DECL_UID (ent->label_decl);
2488 named_label_entry_eq (const void *a, const void *b)
2490 const struct named_label_entry *ent_a = (const struct named_label_entry *) a;
2491 const struct named_label_entry *ent_b = (const struct named_label_entry *) b;
2492 return ent_a->label_decl == ent_b->label_decl;
2495 /* Create a new label, named ID. */
2498 make_label_decl (tree id, int local_p)
2500 struct named_label_entry *ent;
2504 decl = build_decl (input_location, LABEL_DECL, id, void_type_node);
2506 DECL_CONTEXT (decl) = current_function_decl;
2507 DECL_MODE (decl) = VOIDmode;
2508 C_DECLARED_LABEL_FLAG (decl) = local_p;
2510 /* Say where one reference is to the label, for the sake of the
2511 error if it is not defined. */
2512 DECL_SOURCE_LOCATION (decl) = input_location;
2514 /* Record the fact that this identifier is bound to this label. */
2515 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2517 /* Create the label htab for the function on demand. */
2519 named_labels = htab_create_ggc (13, named_label_entry_hash,
2520 named_label_entry_eq, NULL);
2522 /* Record this label on the list of labels used in this function.
2523 We do this before calling make_label_decl so that we get the
2524 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2525 ent = ggc_alloc_cleared_named_label_entry ();
2526 ent->label_decl = decl;
2528 slot = htab_find_slot (named_labels, ent, INSERT);
2529 gcc_assert (*slot == NULL);
2535 /* Look for a label named ID in the current function. If one cannot
2536 be found, create one. (We keep track of used, but undefined,
2537 labels, and complain about them at the end of a function.) */
2540 lookup_label_1 (tree id)
2544 /* You can't use labels at global scope. */
2545 if (current_function_decl == NULL_TREE)
2547 error ("label %qE referenced outside of any function", id);
2551 /* See if we've already got this label. */
2552 decl = IDENTIFIER_LABEL_VALUE (id);
2553 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2556 decl = make_label_decl (id, /*local_p=*/0);
2560 /* Wrapper for lookup_label_1. */
2563 lookup_label (tree id)
2566 bool subtime = timevar_cond_start (TV_NAME_LOOKUP);
2567 ret = lookup_label_1 (id);
2568 timevar_cond_stop (TV_NAME_LOOKUP, subtime);
2572 /* Declare a local label named ID. */
2575 declare_local_label (tree id)
2578 cp_label_binding *bind;
2580 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2581 this scope we can restore the old value of IDENTIFIER_TYPE_VALUE. */
2582 bind = VEC_safe_push (cp_label_binding, gc,
2583 current_binding_level->shadowed_labels, NULL);
2584 bind->prev_value = IDENTIFIER_LABEL_VALUE (id);
2586 decl = make_label_decl (id, /*local_p=*/1);
2592 /* Returns nonzero if it is ill-formed to jump past the declaration of
2593 DECL. Returns 2 if it's also a real problem. */
2596 decl_jump_unsafe (tree decl)
2598 /* [stmt.dcl]/3: A program that jumps from a point where a local variable
2599 with automatic storage duration is not in scope to a point where it is
2600 in scope is ill-formed unless the variable has scalar type, class type
2601 with a trivial default constructor and a trivial destructor, a
2602 cv-qualified version of one of these types, or an array of one of the
2603 preceding types and is declared without an initializer (8.5). */
2604 tree type = TREE_TYPE (decl);
2606 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl)
2607 || type == error_mark_node)
2610 type = strip_array_types (type);
2612 if (type_has_nontrivial_default_init (TREE_TYPE (decl))
2613 || DECL_NONTRIVIALLY_INITIALIZED_P (decl))
2616 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
2622 /* A subroutine of check_previous_goto_1 to identify a branch to the user. */
2625 identify_goto (tree decl, const location_t *locus)
2628 permerror (input_location, "jump to label %qD", decl);
2630 permerror (input_location, "jump to case label");
2632 permerror (*locus, " from here");
2635 /* Check that a single previously seen jump to a newly defined label
2636 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2637 the jump context; NAMES are the names in scope in LEVEL at the jump
2638 context; LOCUS is the source position of the jump or 0. Returns
2639 true if all is well. */
2642 check_previous_goto_1 (tree decl, struct cp_binding_level* level, tree names,
2643 bool exited_omp, const location_t *locus)
2645 struct cp_binding_level *b;
2646 bool identified = false, saw_eh = false, saw_omp = false;
2650 identify_goto (decl, locus);
2651 error (" exits OpenMP structured block");
2652 identified = saw_omp = true;
2655 for (b = current_binding_level; b ; b = b->level_chain)
2657 tree new_decls, old_decls = (b == level ? names : NULL_TREE);
2659 for (new_decls = b->names; new_decls != old_decls;
2660 new_decls = DECL_CHAIN (new_decls))
2662 int problem = decl_jump_unsafe (new_decls);
2668 identify_goto (decl, locus);
2672 error (" crosses initialization of %q+#D", new_decls);
2674 permerror (input_location, " enters scope of %q+#D which has "
2675 "non-trivial destructor", new_decls);
2680 if ((b->kind == sk_try || b->kind == sk_catch) && !saw_eh)
2684 identify_goto (decl, locus);
2687 if (b->kind == sk_try)
2688 error (" enters try block");
2690 error (" enters catch block");
2693 if (b->kind == sk_omp && !saw_omp)
2697 identify_goto (decl, locus);
2700 error (" enters OpenMP structured block");
2709 check_previous_goto (tree decl, struct named_label_use_entry *use)
2711 check_previous_goto_1 (decl, use->binding_level,
2712 use->names_in_scope, use->in_omp_scope,
2713 &use->o_goto_locus);
2717 check_switch_goto (struct cp_binding_level* level)
2719 return check_previous_goto_1 (NULL_TREE, level, level->names, false, NULL);
2722 /* Check that a new jump to a label DECL is OK. Called by
2723 finish_goto_stmt. */
2726 check_goto (tree decl)
2728 struct named_label_entry *ent, dummy;
2729 bool saw_catch = false, identified = false;
2733 /* We can't know where a computed goto is jumping.
2734 So we assume that it's OK. */
2735 if (TREE_CODE (decl) != LABEL_DECL)
2738 /* We didn't record any information about this label when we created it,
2739 and there's not much point since it's trivial to analyze as a return. */
2740 if (decl == cdtor_label)
2743 dummy.label_decl = decl;
2744 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2745 gcc_assert (ent != NULL);
2747 /* If the label hasn't been defined yet, defer checking. */
2748 if (! DECL_INITIAL (decl))
2750 struct named_label_use_entry *new_use;
2752 /* Don't bother creating another use if the last goto had the
2753 same data, and will therefore create the same set of errors. */
2755 && ent->uses->names_in_scope == current_binding_level->names)
2758 new_use = ggc_alloc_named_label_use_entry ();
2759 new_use->binding_level = current_binding_level;
2760 new_use->names_in_scope = current_binding_level->names;
2761 new_use->o_goto_locus = input_location;
2762 new_use->in_omp_scope = false;
2764 new_use->next = ent->uses;
2765 ent->uses = new_use;
2769 if (ent->in_try_scope || ent->in_catch_scope
2770 || ent->in_omp_scope || !VEC_empty (tree, ent->bad_decls))
2772 permerror (input_location, "jump to label %q+D", decl);
2773 permerror (input_location, " from here");
2777 FOR_EACH_VEC_ELT (tree, ent->bad_decls, ix, bad)
2779 int u = decl_jump_unsafe (bad);
2781 if (u > 1 && DECL_ARTIFICIAL (bad))
2783 /* Can't skip init of __exception_info. */
2784 error_at (DECL_SOURCE_LOCATION (bad), " enters catch block");
2788 error (" skips initialization of %q+#D", bad);
2790 permerror (input_location, " enters scope of %q+#D which has "
2791 "non-trivial destructor", bad);
2794 if (ent->in_try_scope)
2795 error (" enters try block");
2796 else if (ent->in_catch_scope && !saw_catch)
2797 error (" enters catch block");
2799 if (ent->in_omp_scope)
2800 error (" enters OpenMP structured block");
2801 else if (flag_openmp)
2803 struct cp_binding_level *b;
2804 for (b = current_binding_level; b ; b = b->level_chain)
2806 if (b == ent->binding_level)
2808 if (b->kind == sk_omp)
2812 permerror (input_location, "jump to label %q+D", decl);
2813 permerror (input_location, " from here");
2816 error (" exits OpenMP structured block");
2823 /* Check that a return is ok wrt OpenMP structured blocks.
2824 Called by finish_return_stmt. Returns true if all is well. */
2827 check_omp_return (void)
2829 struct cp_binding_level *b;
2830 for (b = current_binding_level; b ; b = b->level_chain)
2831 if (b->kind == sk_omp)
2833 error ("invalid exit from OpenMP structured block");
2839 /* Define a label, specifying the location in the source file.
2840 Return the LABEL_DECL node for the label. */
2843 define_label_1 (location_t location, tree name)
2845 struct named_label_entry *ent, dummy;
2846 struct cp_binding_level *p;
2849 decl = lookup_label (name);
2851 dummy.label_decl = decl;
2852 ent = (struct named_label_entry *) htab_find (named_labels, &dummy);
2853 gcc_assert (ent != NULL);
2855 /* After labels, make any new cleanups in the function go into their
2856 own new (temporary) binding contour. */
2857 for (p = current_binding_level;
2858 p->kind != sk_function_parms;
2860 p->more_cleanups_ok = 0;
2862 if (name == get_identifier ("wchar_t"))
2863 permerror (input_location, "label named wchar_t");
2865 if (DECL_INITIAL (decl) != NULL_TREE)
2867 error ("duplicate label %qD", decl);
2868 return error_mark_node;
2872 struct named_label_use_entry *use;
2874 /* Mark label as having been defined. */
2875 DECL_INITIAL (decl) = error_mark_node;
2876 /* Say where in the source. */
2877 DECL_SOURCE_LOCATION (decl) = location;
2879 ent->binding_level = current_binding_level;
2880 ent->names_in_scope = current_binding_level->names;
2882 for (use = ent->uses; use ; use = use->next)
2883 check_previous_goto (decl, use);
2890 /* Wrapper for define_label_1. */
2893 define_label (location_t location, tree name)
2896 timevar_start (TV_NAME_LOOKUP);
2897 ret = define_label_1 (location, name);
2898 timevar_stop (TV_NAME_LOOKUP);
2905 struct cp_binding_level *level;
2906 struct cp_switch *next;
2907 /* The SWITCH_STMT being built. */
2909 /* A splay-tree mapping the low element of a case range to the high
2910 element, or NULL_TREE if there is no high element. Used to
2911 determine whether or not a new case label duplicates an old case
2912 label. We need a tree, rather than simply a hash table, because
2913 of the GNU case range extension. */
2917 /* A stack of the currently active switch statements. The innermost
2918 switch statement is on the top of the stack. There is no need to
2919 mark the stack for garbage collection because it is only active
2920 during the processing of the body of a function, and we never
2921 collect at that point. */
2923 static struct cp_switch *switch_stack;
2925 /* Called right after a switch-statement condition is parsed.
2926 SWITCH_STMT is the switch statement being parsed. */
2929 push_switch (tree switch_stmt)
2931 struct cp_switch *p = XNEW (struct cp_switch);
2932 p->level = current_binding_level;
2933 p->next = switch_stack;
2934 p->switch_stmt = switch_stmt;
2935 p->cases = splay_tree_new (case_compare, NULL, NULL);
2942 struct cp_switch *cs = switch_stack;
2943 location_t switch_location;
2945 /* Emit warnings as needed. */
2946 switch_location = EXPR_LOC_OR_HERE (cs->switch_stmt);
2947 if (!processing_template_decl)
2948 c_do_switch_warnings (cs->cases, switch_location,
2949 SWITCH_STMT_TYPE (cs->switch_stmt),
2950 SWITCH_STMT_COND (cs->switch_stmt));
2952 splay_tree_delete (cs->cases);
2953 switch_stack = switch_stack->next;
2957 /* Note that we've seen a definition of a case label, and complain if this
2958 is a bad place for one. */
2961 finish_case_label (location_t loc, tree low_value, tree high_value)
2964 struct cp_binding_level *p;
2966 if (processing_template_decl)
2970 /* For templates, just add the case label; we'll do semantic
2971 analysis at instantiation-time. */
2972 label = build_decl (loc, LABEL_DECL, NULL_TREE, NULL_TREE);
2973 return add_stmt (build_case_label (loc, low_value, high_value, label));
2976 /* Find the condition on which this switch statement depends. */
2977 cond = SWITCH_STMT_COND (switch_stack->switch_stmt);
2978 if (cond && TREE_CODE (cond) == TREE_LIST)
2979 cond = TREE_VALUE (cond);
2981 if (!check_switch_goto (switch_stack->level))
2982 return error_mark_node;
2985 low_value = cxx_constant_value (low_value);
2987 high_value = cxx_constant_value (high_value);
2989 r = c_add_case_label (loc, switch_stack->cases, cond,
2990 SWITCH_STMT_TYPE (switch_stack->switch_stmt),
2991 low_value, high_value);
2993 /* After labels, make any new cleanups in the function go into their
2994 own new (temporary) binding contour. */
2995 for (p = current_binding_level;
2996 p->kind != sk_function_parms;
2998 p->more_cleanups_ok = 0;
3003 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
3006 typename_hash (const void* k)
3009 const_tree const t = (const_tree) k;
3011 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
3012 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
3017 typedef struct typename_info {
3025 /* Compare two TYPENAME_TYPEs. K1 is really of type `tree', K2 is
3026 really of type `typename_info*' */
3029 typename_compare (const void * k1, const void * k2)
3031 const_tree const t1 = (const_tree) k1;
3032 const typename_info *const t2 = (const typename_info *) k2;
3034 return (DECL_NAME (TYPE_NAME (t1)) == t2->name
3035 && TYPE_CONTEXT (t1) == t2->scope
3036 && TYPENAME_TYPE_FULLNAME (t1) == t2->template_id
3037 && TYPENAME_IS_ENUM_P (t1) == t2->enum_p
3038 && TYPENAME_IS_CLASS_P (t1) == t2->class_p);
3041 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
3042 the type of `T', NAME is the IDENTIFIER_NODE for `t'.
3044 Returns the new TYPENAME_TYPE. */
3046 static GTY ((param_is (union tree_node))) htab_t typename_htab;
3049 build_typename_type (tree context, tree name, tree fullname,
3050 enum tag_types tag_type)
3058 if (typename_htab == NULL)
3059 typename_htab = htab_create_ggc (61, &typename_hash,
3060 &typename_compare, NULL);
3062 ti.scope = FROB_CONTEXT (context);
3064 ti.template_id = fullname;
3065 ti.enum_p = tag_type == enum_type;
3066 ti.class_p = (tag_type == class_type
3067 || tag_type == record_type
3068 || tag_type == union_type);
3069 hash = (htab_hash_pointer (ti.scope)
3070 ^ htab_hash_pointer (ti.name));
3072 /* See if we already have this type. */
3073 e = htab_find_slot_with_hash (typename_htab, &ti, hash, INSERT);
3078 /* Build the TYPENAME_TYPE. */
3079 t = cxx_make_type (TYPENAME_TYPE);
3080 TYPE_CONTEXT (t) = ti.scope;
3081 TYPENAME_TYPE_FULLNAME (t) = ti.template_id;
3082 TYPENAME_IS_ENUM_P (t) = ti.enum_p;
3083 TYPENAME_IS_CLASS_P (t) = ti.class_p;
3085 /* Build the corresponding TYPE_DECL. */
3086 d = build_decl (input_location, TYPE_DECL, name, t);
3087 TYPE_NAME (TREE_TYPE (d)) = d;
3088 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
3089 DECL_CONTEXT (d) = FROB_CONTEXT (context);
3090 DECL_ARTIFICIAL (d) = 1;
3092 /* Store it in the hash table. */
3095 /* TYPENAME_TYPEs must always be compared structurally, because
3096 they may or may not resolve down to another type depending on
3097 the currently open classes. */
3098 SET_TYPE_STRUCTURAL_EQUALITY (t);
3104 /* Resolve `typename CONTEXT::NAME'. TAG_TYPE indicates the tag
3105 provided to name the type. Returns an appropriate type, unless an
3106 error occurs, in which case error_mark_node is returned. If we
3107 locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is set, we
3108 return that, rather than the _TYPE it corresponds to, in other
3109 cases we look through the type decl. If TF_ERROR is set, complain
3110 about errors, otherwise be quiet. */
3113 make_typename_type (tree context, tree name, enum tag_types tag_type,
3114 tsubst_flags_t complain)
3120 if (name == error_mark_node
3121 || context == NULL_TREE
3122 || context == error_mark_node)
3123 return error_mark_node;
3127 if (!(TYPE_LANG_SPECIFIC (name)
3128 && (CLASSTYPE_IS_TEMPLATE (name)
3129 || CLASSTYPE_USE_TEMPLATE (name))))
3130 name = TYPE_IDENTIFIER (name);
3132 /* Create a TEMPLATE_ID_EXPR for the type. */
3133 name = build_nt (TEMPLATE_ID_EXPR,
3134 CLASSTYPE_TI_TEMPLATE (name),
3135 CLASSTYPE_TI_ARGS (name));
3137 else if (TREE_CODE (name) == TYPE_DECL)
3138 name = DECL_NAME (name);
3142 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
3144 name = TREE_OPERAND (name, 0);
3145 if (TREE_CODE (name) == TEMPLATE_DECL)
3146 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
3147 else if (TREE_CODE (name) == OVERLOAD)
3149 error ("%qD is not a type", name);
3150 return error_mark_node;
3153 if (TREE_CODE (name) == TEMPLATE_DECL)
3155 error ("%qD used without template parameters", name);
3156 return error_mark_node;
3158 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3159 gcc_assert (TYPE_P (context));
3161 if (!MAYBE_CLASS_TYPE_P (context))
3163 if (complain & tf_error)
3164 error ("%q#T is not a class", context);
3165 return error_mark_node;
3168 /* When the CONTEXT is a dependent type, NAME could refer to a
3169 dependent base class of CONTEXT. But look inside it anyway
3170 if CONTEXT is a currently open scope, in case it refers to a
3171 member of the current instantiation or a non-dependent base;
3172 lookup will stop when we hit a dependent base. */
3173 if (!dependent_scope_p (context))
3174 /* We should only set WANT_TYPE when we're a nested typename type.
3175 Then we can give better diagnostics if we find a non-type. */
3176 t = lookup_field (context, name, 2, /*want_type=*/true);
3180 if ((!t || TREE_CODE (t) == TREE_LIST) && dependent_type_p (context))
3181 return build_typename_type (context, name, fullname, tag_type);
3183 want_template = TREE_CODE (fullname) == TEMPLATE_ID_EXPR;
3187 if (complain & tf_error)
3188 error (want_template ? "no class template named %q#T in %q#T"
3189 : "no type named %q#T in %q#T", name, context);
3190 return error_mark_node;
3193 /* Pull out the template from an injected-class-name (or multiple). */
3195 t = maybe_get_template_decl_from_type_decl (t);
3197 if (TREE_CODE (t) == TREE_LIST)
3199 if (complain & tf_error)
3201 error ("lookup of %qT in %qT is ambiguous", name, context);
3202 print_candidates (t);
3204 return error_mark_node;
3207 if (want_template && !DECL_CLASS_TEMPLATE_P (t))
3209 if (complain & tf_error)
3210 error ("%<typename %T::%D%> names %q#T, which is not a class template",
3212 return error_mark_node;
3214 if (!want_template && TREE_CODE (t) != TYPE_DECL)
3216 if (complain & tf_error)
3217 error ("%<typename %T::%D%> names %q#T, which is not a type",
3219 return error_mark_node;
3222 if (complain & tf_error)
3223 perform_or_defer_access_check (TYPE_BINFO (context), t, t);
3225 /* If we are currently parsing a template and if T is a typedef accessed
3226 through CONTEXT then we need to remember and check access of T at
3227 template instantiation time. */
3228 add_typedef_to_current_template_for_access_check (t, context, input_location);
3231 return lookup_template_class (t, TREE_OPERAND (fullname, 1),
3233 /*entering_scope=*/0,
3234 tf_warning_or_error | tf_user);
3236 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
3242 /* Resolve `CONTEXT::template NAME'. Returns a TEMPLATE_DECL if the name
3243 can be resolved or an UNBOUND_CLASS_TEMPLATE, unless an error occurs,
3244 in which case error_mark_node is returned.
3246 If PARM_LIST is non-NULL, also make sure that the template parameter
3247 list of TEMPLATE_DECL matches.
3249 If COMPLAIN zero, don't complain about any errors that occur. */
3252 make_unbound_class_template (tree context, tree name, tree parm_list,
3253 tsubst_flags_t complain)
3259 name = TYPE_IDENTIFIER (name);
3260 else if (DECL_P (name))
3261 name = DECL_NAME (name);
3262 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
3264 if (!dependent_type_p (context)
3265 || currently_open_class (context))
3267 tree tmpl = NULL_TREE;
3269 if (MAYBE_CLASS_TYPE_P (context))
3270 tmpl = lookup_field (context, name, 0, false);
3272 if (tmpl && TREE_CODE (tmpl) == TYPE_DECL)
3273 tmpl = maybe_get_template_decl_from_type_decl (tmpl);
3275 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
3277 if (complain & tf_error)
3278 error ("no class template named %q#T in %q#T", name, context);
3279 return error_mark_node;
3283 && !comp_template_parms (DECL_TEMPLATE_PARMS (tmpl), parm_list))
3285 if (complain & tf_error)
3287 error ("template parameters do not match template");
3288 error ("%q+D declared here", tmpl);
3290 return error_mark_node;
3293 if (complain & tf_error)
3294 perform_or_defer_access_check (TYPE_BINFO (context), tmpl, tmpl);
3299 /* Build the UNBOUND_CLASS_TEMPLATE. */
3300 t = cxx_make_type (UNBOUND_CLASS_TEMPLATE);
3301 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
3302 TREE_TYPE (t) = NULL_TREE;
3303 SET_TYPE_STRUCTURAL_EQUALITY (t);
3305 /* Build the corresponding TEMPLATE_DECL. */
3306 d = build_decl (input_location, TEMPLATE_DECL, name, t);
3307 TYPE_NAME (TREE_TYPE (d)) = d;
3308 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
3309 DECL_CONTEXT (d) = FROB_CONTEXT (context);
3310 DECL_ARTIFICIAL (d) = 1;
3311 DECL_TEMPLATE_PARMS (d) = parm_list;
3318 /* Push the declarations of builtin types into the namespace.
3319 RID_INDEX is the index of the builtin type in the array
3320 RID_POINTERS. NAME is the name used when looking up the builtin
3321 type. TYPE is the _TYPE node for the builtin type. */
3324 record_builtin_type (enum rid rid_index,
3328 tree rname = NULL_TREE, tname = NULL_TREE;
3329 tree tdecl = NULL_TREE;
3331 if ((int) rid_index < (int) RID_MAX)
3332 rname = ridpointers[(int) rid_index];
3334 tname = get_identifier (name);
3336 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
3337 eliminated. Built-in types should not be looked up name; their
3338 names are keywords that the parser can recognize. However, there
3339 is code in c-common.c that uses identifier_global_value to look
3340 up built-in types by name. */
3343 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, tname, type);
3344 DECL_ARTIFICIAL (tdecl) = 1;
3345 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
3351 tdecl = build_decl (BUILTINS_LOCATION, TYPE_DECL, rname, type);
3352 DECL_ARTIFICIAL (tdecl) = 1;
3354 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
3357 if (!TYPE_NAME (type))
3358 TYPE_NAME (type) = tdecl;
3361 debug_hooks->type_decl (tdecl, 0);
3364 /* Record one of the standard Java types.
3365 * Declare it as having the given NAME.
3366 * If SIZE > 0, it is the size of one of the integral types;
3367 * otherwise it is the negative of the size of one of the other types. */
3370 record_builtin_java_type (const char* name, int size)
3375 type = build_nonstandard_integer_type (size, 0);
3376 type = build_distinct_type_copy (type);
3378 else if (size > -32)
3381 /* "__java_char" or ""__java_boolean". */
3382 type = build_nonstandard_integer_type (-size, 1);
3383 type = build_distinct_type_copy (type);
3384 /* Get the signed type cached and attached to the unsigned type,
3385 so it doesn't get garbage-collected at "random" times,
3386 causing potential codegen differences out of different UIDs
3387 and different alias set numbers. */
3388 stype = build_nonstandard_integer_type (-size, 0);
3389 stype = build_distinct_type_copy (stype);
3390 TREE_CHAIN (type) = stype;
3391 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
3394 { /* "__java_float" or ""__java_double". */
3395 type = make_node (REAL_TYPE);
3396 TYPE_PRECISION (type) = - size;
3399 record_builtin_type (RID_MAX, name, type);
3400 decl = TYPE_NAME (type);
3402 /* Suppress generate debug symbol entries for these types,
3403 since for normal C++ they are just clutter.
3404 However, push_lang_context undoes this if extern "Java" is seen. */
3405 DECL_IGNORED_P (decl) = 1;
3407 TYPE_FOR_JAVA (type) = 1;
3411 /* Push a type into the namespace so that the back ends ignore it. */
3414 record_unknown_type (tree type, const char* name)
3416 tree decl = pushdecl (build_decl (UNKNOWN_LOCATION,
3417 TYPE_DECL, get_identifier (name), type));
3418 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
3419 DECL_IGNORED_P (decl) = 1;
3420 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
3421 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
3422 TYPE_ALIGN (type) = 1;
3423 TYPE_USER_ALIGN (type) = 0;
3424 SET_TYPE_MODE (type, TYPE_MODE (void_type_node));
3427 /* A string for which we should create an IDENTIFIER_NODE at
3430 typedef struct predefined_identifier
3432 /* The name of the identifier. */
3433 const char *const name;
3434 /* The place where the IDENTIFIER_NODE should be stored. */
3436 /* Nonzero if this is the name of a constructor or destructor. */
3437 const int ctor_or_dtor_p;
3438 } predefined_identifier;
3440 /* Create all the predefined identifiers. */
3443 initialize_predefined_identifiers (void)
3445 const predefined_identifier *pid;
3447 /* A table of identifiers to create at startup. */
3448 static const predefined_identifier predefined_identifiers[] = {
3449 { "C++", &lang_name_cplusplus, 0 },
3450 { "C", &lang_name_c, 0 },
3451 { "Java", &lang_name_java, 0 },
3452 /* Some of these names have a trailing space so that it is
3453 impossible for them to conflict with names written by users. */
3454 { "__ct ", &ctor_identifier, 1 },
3455 { "__base_ctor ", &base_ctor_identifier, 1 },
3456 { "__comp_ctor ", &complete_ctor_identifier, 1 },
3457 { "__dt ", &dtor_identifier, 1 },
3458 { "__comp_dtor ", &complete_dtor_identifier, 1 },
3459 { "__base_dtor ", &base_dtor_identifier, 1 },
3460 { "__deleting_dtor ", &deleting_dtor_identifier, 1 },
3461 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
3462 { "nelts", &nelts_identifier, 0 },
3463 { THIS_NAME, &this_identifier, 0 },
3464 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
3465 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
3466 { "_vptr", &vptr_identifier, 0 },
3467 { "__vtt_parm", &vtt_parm_identifier, 0 },
3468 { "::", &global_scope_name, 0 },
3469 { "std", &std_identifier, 0 },
3473 for (pid = predefined_identifiers; pid->name; ++pid)
3475 *pid->node = get_identifier (pid->name);
3476 if (pid->ctor_or_dtor_p)
3477 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
3481 /* Create the predefined scalar types of C,
3482 and some nodes representing standard constants (0, 1, (void *)0).
3483 Initialize the global binding level.
3484 Make definitions for built-in primitive functions. */
3487 cxx_init_decl_processing (void)
3490 tree void_ftype_ptr;
3492 build_common_tree_nodes (flag_signed_char);
3494 /* Create all the identifiers we need. */
3495 initialize_predefined_identifiers ();
3497 /* Create the global variables. */
3498 push_to_top_level ();
3500 current_function_decl = NULL_TREE;
3501 current_binding_level = NULL;
3502 /* Enter the global namespace. */
3503 gcc_assert (global_namespace == NULL_TREE);
3504 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
3506 DECL_CONTEXT (global_namespace) = build_translation_unit_decl (NULL_TREE);
3507 TREE_PUBLIC (global_namespace) = 1;
3508 begin_scope (sk_namespace, global_namespace);
3510 current_lang_name = NULL_TREE;
3512 if (flag_visibility_ms_compat)
3513 default_visibility = VISIBILITY_HIDDEN;
3516 current_lang_name = lang_name_c;
3518 /* Create the `std' namespace. */
3519 push_namespace (std_identifier);
3520 std_node = current_namespace;
3523 c_common_nodes_and_builtins ();
3525 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
3526 java_short_type_node = record_builtin_java_type ("__java_short", 16);
3527 java_int_type_node = record_builtin_java_type ("__java_int", 32);
3528 java_long_type_node = record_builtin_java_type ("__java_long", 64);
3529 java_float_type_node = record_builtin_java_type ("__java_float", -32);
3530 java_double_type_node = record_builtin_java_type ("__java_double", -64);
3531 java_char_type_node = record_builtin_java_type ("__java_char", -16);
3532 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
3534 integer_two_node = build_int_cst (NULL_TREE, 2);
3536 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
3537 truthvalue_type_node = boolean_type_node;
3538 truthvalue_false_node = boolean_false_node;
3539 truthvalue_true_node = boolean_true_node;
3541 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
3542 noexcept_true_spec = build_tree_list (boolean_true_node, NULL_TREE);
3543 noexcept_false_spec = build_tree_list (boolean_false_node, NULL_TREE);
3546 record_builtin_type (RID_MAX, NULL, string_type_node);
3549 delta_type_node = ptrdiff_type_node;
3550 vtable_index_type = ptrdiff_type_node;
3552 vtt_parm_type = build_pointer_type (const_ptr_type_node);
3553 void_ftype = build_function_type_list (void_type_node, NULL_TREE);
3554 void_ftype_ptr = build_function_type_list (void_type_node,
3555 ptr_type_node, NULL_TREE);
3557 = build_exception_variant (void_ftype_ptr, empty_except_spec);
3559 /* C++ extensions */
3561 unknown_type_node = make_node (LANG_TYPE);
3562 record_unknown_type (unknown_type_node, "unknown type");
3564 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
3565 TREE_TYPE (unknown_type_node) = unknown_type_node;
3567 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
3569 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
3570 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
3572 init_list_type_node = make_node (LANG_TYPE);
3573 record_unknown_type (init_list_type_node, "init list");
3576 /* Make sure we get a unique function type, so we can give
3577 its pointer type a name. (This wins for gdb.) */
3578 tree vfunc_type = make_node (FUNCTION_TYPE);
3579 TREE_TYPE (vfunc_type) = integer_type_node;
3580 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
3581 layout_type (vfunc_type);
3583 vtable_entry_type = build_pointer_type (vfunc_type);
3585 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
3588 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
3589 layout_type (vtbl_type_node);
3590 vtbl_type_node = cp_build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3591 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3592 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3593 layout_type (vtbl_ptr_type_node);
3594 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3596 push_namespace (get_identifier ("__cxxabiv1"));
3597 abi_node = current_namespace;
3600 global_type_node = make_node (LANG_TYPE);
3601 record_unknown_type (global_type_node, "global type");
3604 current_lang_name = lang_name_cplusplus;
3607 tree newtype, deltype;
3608 tree ptr_ftype_sizetype;
3612 = build_function_type_list (ptr_type_node, size_type_node, NULL_TREE);
3613 if (cxx_dialect == cxx98)
3616 tree bad_alloc_type_node;
3617 tree bad_alloc_decl;
3619 push_namespace (std_identifier);
3620 bad_alloc_id = get_identifier ("bad_alloc");
3621 bad_alloc_type_node = make_class_type (RECORD_TYPE);
3622 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3624 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3625 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3629 = add_exception_specifier (NULL_TREE, bad_alloc_type_node, -1);
3632 new_eh_spec = noexcept_false_spec;
3634 newtype = build_exception_variant (ptr_ftype_sizetype, new_eh_spec);
3635 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3636 push_cp_library_fn (NEW_EXPR, newtype);
3637 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3638 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3639 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3641 nullptr_type_node = make_node (NULLPTR_TYPE);
3642 TYPE_SIZE (nullptr_type_node) = bitsize_int (GET_MODE_BITSIZE (ptr_mode));
3643 TYPE_SIZE_UNIT (nullptr_type_node) = size_int (GET_MODE_SIZE (ptr_mode));
3644 TYPE_UNSIGNED (nullptr_type_node) = 1;
3645 TYPE_PRECISION (nullptr_type_node) = GET_MODE_BITSIZE (ptr_mode);
3646 SET_TYPE_MODE (nullptr_type_node, Pmode);
3647 record_builtin_type (RID_MAX, "decltype(nullptr)", nullptr_type_node);
3648 nullptr_node = build_int_cst (nullptr_type_node, 0);
3652 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3654 /* Perform other language dependent initializations. */
3655 init_class_processing ();
3656 init_rtti_processing ();
3657 init_template_processing ();
3659 if (flag_exceptions)
3660 init_exception_processing ();
3662 if (! supports_one_only ())
3665 make_fname_decl = cp_make_fname_decl;
3666 start_fname_decls ();
3668 /* Show we use EH for cleanups. */
3669 if (flag_exceptions)
3670 using_eh_for_cleanups ();
3673 /* Generate an initializer for a function naming variable from
3674 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3675 filled in with the type of the init. */
3678 cp_fname_init (const char* name, tree *type_p)
3680 tree domain = NULL_TREE;
3682 tree init = NULL_TREE;
3687 length = strlen (name);
3688 domain = build_index_type (size_int (length));
3689 init = build_string (length + 1, name);
3692 type = cp_build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3693 type = build_cplus_array_type (type, domain);
3698 TREE_TYPE (init) = type;
3700 init = error_mark_node;
3705 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give
3706 the decl, LOC is the location to give the decl, NAME is the
3707 initialization string and TYPE_DEP indicates whether NAME depended
3708 on the type of the function. We make use of that to detect
3709 __PRETTY_FUNCTION__ inside a template fn. This is being done lazily
3710 at the point of first use, so we mustn't push the decl now. */
3713 cp_make_fname_decl (location_t loc, tree id, int type_dep)
3715 const char *const name = (type_dep && processing_template_decl
3716 ? NULL : fname_as_string (type_dep));
3718 tree init = cp_fname_init (name, &type);
3719 tree decl = build_decl (loc, VAR_DECL, id, type);
3722 free (CONST_CAST (char *, name));
3724 /* As we're using pushdecl_with_scope, we must set the context. */
3725 DECL_CONTEXT (decl) = current_function_decl;
3726 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3728 TREE_STATIC (decl) = 1;
3729 TREE_READONLY (decl) = 1;
3730 DECL_ARTIFICIAL (decl) = 1;
3732 TREE_USED (decl) = 1;
3734 if (current_function_decl)
3736 struct cp_binding_level *b = current_binding_level;
3737 if (b->kind == sk_function_parms)
3738 return error_mark_node;
3739 while (b->level_chain->kind != sk_function_parms)
3741 pushdecl_with_scope (decl, b, /*is_friend=*/false);
3742 cp_finish_decl (decl, init, /*init_const_expr_p=*/false, NULL_TREE,
3743 LOOKUP_ONLYCONVERTING);
3747 DECL_THIS_STATIC (decl) = true;
3748 pushdecl_top_level_and_finish (decl, init);
3755 builtin_function_1 (tree decl, tree context, bool is_global)
3757 tree id = DECL_NAME (decl);
3758 const char *name = IDENTIFIER_POINTER (id);
3760 retrofit_lang_decl (decl);
3762 DECL_ARTIFICIAL (decl) = 1;
3763 SET_OVERLOADED_OPERATOR_CODE (decl, ERROR_MARK);
3764 SET_DECL_LANGUAGE (decl, lang_c);
3765 /* Runtime library routines are, by definition, available in an
3766 external shared object. */
3767 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
3768 DECL_VISIBILITY_SPECIFIED (decl) = 1;
3770 DECL_CONTEXT (decl) = context;
3773 pushdecl_top_level (decl);
3777 /* A function in the user's namespace should have an explicit
3778 declaration before it is used. Mark the built-in function as
3779 anticipated but not actually declared. */
3780 if (name[0] != '_' || name[1] != '_')
3781 DECL_ANTICIPATED (decl) = 1;
3782 else if (strncmp (name + 2, "builtin_", strlen ("builtin_")) != 0)
3784 size_t len = strlen (name);
3786 /* Treat __*_chk fortification functions as anticipated as well,
3787 unless they are __builtin_*. */
3788 if (len > strlen ("___chk")
3789 && memcmp (name + len - strlen ("_chk"),
3790 "_chk", strlen ("_chk") + 1) == 0)
3791 DECL_ANTICIPATED (decl) = 1;
3798 cxx_builtin_function (tree decl)
3800 tree id = DECL_NAME (decl);
3801 const char *name = IDENTIFIER_POINTER (id);
3802 /* All builtins that don't begin with an '_' should additionally
3803 go in the 'std' namespace. */
3806 tree decl2 = copy_node(decl);
3807 push_namespace (std_identifier);
3808 builtin_function_1 (decl2, std_node, false);
3812 return builtin_function_1 (decl, NULL_TREE, false);
3815 /* Like cxx_builtin_function, but guarantee the function is added to the global
3816 scope. This is to allow function specific options to add new machine
3817 dependent builtins when the target ISA changes via attribute((target(...)))
3818 which saves space on program startup if the program does not use non-generic
3822 cxx_builtin_function_ext_scope (tree decl)
3825 tree id = DECL_NAME (decl);
3826 const char *name = IDENTIFIER_POINTER (id);
3827 /* All builtins that don't begin with an '_' should additionally
3828 go in the 'std' namespace. */
3831 tree decl2 = copy_node(decl);
3832 push_namespace (std_identifier);
3833 builtin_function_1 (decl2, std_node, true);
3837 return builtin_function_1 (decl, NULL_TREE, true);
3840 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3841 function. Not called directly. */
3844 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3846 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3847 DECL_EXTERNAL (fn) = 1;
3848 TREE_PUBLIC (fn) = 1;
3849 DECL_ARTIFICIAL (fn) = 1;
3850 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3851 SET_DECL_LANGUAGE (fn, lang_c);
3852 /* Runtime library routines are, by definition, available in an
3853 external shared object. */
3854 DECL_VISIBILITY (fn) = VISIBILITY_DEFAULT;
3855 DECL_VISIBILITY_SPECIFIED (fn) = 1;
3859 /* Returns the _DECL for a library function with C linkage.
3860 We assume that such functions never throw; if this is incorrect,
3861 callers should unset TREE_NOTHROW. */
3864 build_library_fn (tree name, tree type)
3866 tree fn = build_library_fn_1 (name, ERROR_MARK, type);
3867 TREE_NOTHROW (fn) = 1;
3871 /* Returns the _DECL for a library function with C++ linkage. */
3874 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3876 tree fn = build_library_fn_1 (name, operator_code, type);
3877 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3878 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3879 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3883 /* Like build_library_fn, but takes a C string instead of an
3887 build_library_fn_ptr (const char* name, tree type)
3889 return build_library_fn (get_identifier (name), type);
3892 /* Like build_cp_library_fn, but takes a C string instead of an
3896 build_cp_library_fn_ptr (const char* name, tree type)
3898 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3901 /* Like build_library_fn, but also pushes the function so that we will
3902 be able to find it via IDENTIFIER_GLOBAL_VALUE. Also, the function
3903 may throw exceptions listed in RAISES. */
3906 push_library_fn (tree name, tree type, tree raises)
3911 type = build_exception_variant (type, raises);
3913 fn = build_library_fn (name, type);
3914 pushdecl_top_level (fn);
3918 /* Like build_cp_library_fn, but also pushes the function so that it
3919 will be found by normal lookup. */
3922 push_cp_library_fn (enum tree_code operator_code, tree type)
3924 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3931 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3935 push_void_library_fn (tree name, tree parmtypes)
3937 tree type = build_function_type (void_type_node, parmtypes);
3938 return push_library_fn (name, type, NULL_TREE);
3941 /* Like push_library_fn, but also note that this function throws
3942 and does not return. Used for __throw_foo and the like. */
3945 push_throw_library_fn (tree name, tree type)
3947 tree fn = push_library_fn (name, type, NULL_TREE);
3948 TREE_THIS_VOLATILE (fn) = 1;
3949 TREE_NOTHROW (fn) = 0;
3953 /* When we call finish_struct for an anonymous union, we create
3954 default copy constructors and such. But, an anonymous union
3955 shouldn't have such things; this function undoes the damage to the
3956 anonymous union type T.
3958 (The reason that we create the synthesized methods is that we don't
3959 distinguish `union { int i; }' from `typedef union { int i; } U'.
3960 The first is an anonymous union; the second is just an ordinary
3964 fixup_anonymous_aggr (tree t)
3968 /* Wipe out memory of synthesized methods. */
3969 TYPE_HAS_USER_CONSTRUCTOR (t) = 0;
3970 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3971 TYPE_HAS_COPY_CTOR (t) = 0;
3972 TYPE_HAS_CONST_COPY_CTOR (t) = 0;
3973 TYPE_HAS_COPY_ASSIGN (t) = 0;
3974 TYPE_HAS_CONST_COPY_ASSIGN (t) = 0;
3976 /* Splice the implicitly generated functions out of the TYPE_METHODS
3978 q = &TYPE_METHODS (t);
3981 if (DECL_ARTIFICIAL (*q))
3982 *q = TREE_CHAIN (*q);
3984 q = &DECL_CHAIN (*q);
3987 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3988 if (TYPE_METHODS (t))
3990 tree decl = TYPE_MAIN_DECL (t);
3992 if (TREE_CODE (t) != UNION_TYPE)
3993 error_at (DECL_SOURCE_LOCATION (decl),
3994 "an anonymous struct cannot have function members");
3996 error_at (DECL_SOURCE_LOCATION (decl),
3997 "an anonymous union cannot have function members");
4000 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
4001 assignment operators (because they cannot have these methods themselves).
4002 For anonymous unions this is already checked because they are not allowed
4003 in any union, otherwise we have to check it. */
4004 if (TREE_CODE (t) != UNION_TYPE)
4008 for (field = TYPE_FIELDS (t); field; field = DECL_CHAIN (field))
4009 if (TREE_CODE (field) == FIELD_DECL)
4011 type = TREE_TYPE (field);
4012 if (CLASS_TYPE_P (type))
4014 if (TYPE_NEEDS_CONSTRUCTING (type))
4015 error ("member %q+#D with constructor not allowed "
4016 "in anonymous aggregate", field);
4017 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
4018 error ("member %q+#D with destructor not allowed "
4019 "in anonymous aggregate", field);
4020 if (TYPE_HAS_COMPLEX_COPY_ASSIGN (type))
4021 error ("member %q+#D with copy assignment operator "
4022 "not allowed in anonymous aggregate", field);
4028 /* Make sure that a declaration with no declarator is well-formed, i.e.
4029 just declares a tagged type or anonymous union.
4031 Returns the type declared; or NULL_TREE if none. */
4034 check_tag_decl (cp_decl_specifier_seq *declspecs)
4036 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
4037 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
4038 /* If a class, struct, or enum type is declared by the DECLSPECS
4039 (i.e, if a class-specifier, enum-specifier, or non-typename
4040 elaborated-type-specifier appears in the DECLSPECS),
4041 DECLARED_TYPE is set to the corresponding type. */
4042 tree declared_type = NULL_TREE;
4043 bool error_p = false;
4045 if (declspecs->multiple_types_p)
4046 error ("multiple types in one declaration");
4047 else if (declspecs->redefined_builtin_type)
4049 if (!in_system_header)
4050 permerror (input_location, "redeclaration of C++ built-in type %qT",
4051 declspecs->redefined_builtin_type);
4056 && TYPE_P (declspecs->type)
4057 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
4058 && MAYBE_CLASS_TYPE_P (declspecs->type))
4059 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
4060 declared_type = declspecs->type;
4061 else if (declspecs->type == error_mark_node)
4063 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
4064 permerror (input_location, "declaration does not declare anything");
4065 /* Check for an anonymous union. */
4066 else if (declared_type && RECORD_OR_UNION_CODE_P (TREE_CODE (declared_type))
4067 && TYPE_ANONYMOUS_P (declared_type))
4069 /* 7/3 In a simple-declaration, the optional init-declarator-list
4070 can be omitted only when declaring a class (clause 9) or
4071 enumeration (7.2), that is, when the decl-specifier-seq contains
4072 either a class-specifier, an elaborated-type-specifier with
4073 a class-key (9.1), or an enum-specifier. In these cases and
4074 whenever a class-specifier or enum-specifier is present in the
4075 decl-specifier-seq, the identifiers in these specifiers are among
4076 the names being declared by the declaration (as class-name,
4077 enum-names, or enumerators, depending on the syntax). In such
4078 cases, and except for the declaration of an unnamed bit-field (9.6),
4079 the decl-specifier-seq shall introduce one or more names into the
4080 program, or shall redeclare a name introduced by a previous
4081 declaration. [Example:
4082 enum { }; // ill-formed
4083 typedef class { }; // ill-formed
4087 error ("missing type-name in typedef-declaration");
4090 /* Anonymous unions are objects, so they can have specifiers. */;
4091 SET_ANON_AGGR_TYPE_P (declared_type);
4093 if (TREE_CODE (declared_type) != UNION_TYPE && !in_system_header)
4094 pedwarn (input_location, OPT_pedantic, "ISO C++ prohibits anonymous structs");
4099 if (declspecs->specs[(int)ds_inline]
4100 || declspecs->specs[(int)ds_virtual])
4101 error ("%qs can only be specified for functions",
4102 declspecs->specs[(int)ds_inline]
4103 ? "inline" : "virtual");
4105 && (!current_class_type
4106 || current_scope () != current_class_type))
4107 error ("%<friend%> can only be specified inside a class");
4108 else if (declspecs->specs[(int)ds_explicit])
4109 error ("%<explicit%> can only be specified for constructors");
4110 else if (declspecs->storage_class)
4111 error ("a storage class can only be specified for objects "
4113 else if (declspecs->specs[(int)ds_const]
4114 || declspecs->specs[(int)ds_volatile]
4115 || declspecs->specs[(int)ds_restrict]
4116 || declspecs->specs[(int)ds_thread])
4117 error ("qualifiers can only be specified for objects "
4119 else if (saw_typedef)
4120 warning (0, "%<typedef%> was ignored in this declaration");
4121 else if (declspecs->specs[(int) ds_constexpr])
4122 error ("%<constexpr%> cannot be used for type declarations");
4125 return declared_type;
4128 /* Called when a declaration is seen that contains no names to declare.
4129 If its type is a reference to a structure, union or enum inherited
4130 from a containing scope, shadow that tag name for the current scope
4131 with a forward reference.
4132 If its type defines a new named structure or union
4133 or defines an enum, it is valid but we need not do anything here.
4134 Otherwise, it is an error.
4136 C++: may have to grok the declspecs to learn about static,
4137 complain for anonymous unions.
4139 Returns the TYPE declared -- or NULL_TREE if none. */
4142 shadow_tag (cp_decl_specifier_seq *declspecs)
4144 tree t = check_tag_decl (declspecs);
4149 if (declspecs->attributes)
4151 warning (0, "attribute ignored in declaration of %q+#T", t);
4152 warning (0, "attribute for %q+#T must follow the %qs keyword",
4153 t, class_key_or_enum_as_string (t));
4157 if (maybe_process_partial_specialization (t) == error_mark_node)
4160 /* This is where the variables in an anonymous union are
4161 declared. An anonymous union declaration looks like:
4163 because there is no declarator after the union, the parser
4164 sends that declaration here. */
4165 if (ANON_AGGR_TYPE_P (t))
4167 fixup_anonymous_aggr (t);
4169 if (TYPE_FIELDS (t))
4171 tree decl = grokdeclarator (/*declarator=*/NULL,
4172 declspecs, NORMAL, 0, NULL);
4173 finish_anon_union (decl);
4180 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
4183 groktypename (cp_decl_specifier_seq *type_specifiers,
4184 const cp_declarator *declarator,
4185 bool is_template_arg)
4189 enum decl_context context
4190 = is_template_arg ? TEMPLATE_TYPE_ARG : TYPENAME;
4191 attrs = type_specifiers->attributes;
4192 type_specifiers->attributes = NULL_TREE;
4193 type = grokdeclarator (declarator, type_specifiers, context, 0, &attrs);
4194 if (attrs && type != error_mark_node)
4196 if (CLASS_TYPE_P (type))
4197 warning (OPT_Wattributes, "ignoring attributes applied to class type %qT "
4198 "outside of definition", type);
4199 else if (MAYBE_CLASS_TYPE_P (type))
4200 /* A template type parameter or other dependent type. */
4201 warning (OPT_Wattributes, "ignoring attributes applied to dependent "
4202 "type %qT without an associated declaration", type);
4204 cplus_decl_attributes (&type, attrs, 0);
4209 /* Process a DECLARATOR for a function-scope variable declaration,
4210 namespace-scope variable declaration, or function declaration.
4211 (Function definitions go through start_function; class member
4212 declarations appearing in the body of the class go through
4213 grokfield.) The DECL corresponding to the DECLARATOR is returned.
4214 If an error occurs, the error_mark_node is returned instead.
4216 DECLSPECS are the decl-specifiers for the declaration. INITIALIZED is
4217 SD_INITIALIZED if an explicit initializer is present, or SD_DEFAULTED
4218 for an explicitly defaulted function, or SD_DELETED for an explicitly
4219 deleted function, but 0 (SD_UNINITIALIZED) if this is a variable
4220 implicitly initialized via a default constructor. ATTRIBUTES and
4221 PREFIX_ATTRIBUTES are GNU attributes associated with this declaration.
4222 *PUSHED_SCOPE_P is set to the scope entered in this function, if any; if
4223 set, the caller is responsible for calling pop_scope. */
4226 start_decl (const cp_declarator *declarator,
4227 cp_decl_specifier_seq *declspecs,
4230 tree prefix_attributes,
4231 tree *pushed_scope_p)
4239 *pushed_scope_p = NULL_TREE;
4241 /* An object declared as __attribute__((deprecated)) suppresses
4242 warnings of uses of other deprecated items. */
4243 if (lookup_attribute ("deprecated", attributes))
4244 deprecated_state = DEPRECATED_SUPPRESS;
4246 attributes = chainon (attributes, prefix_attributes);
4248 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
4251 deprecated_state = DEPRECATED_NORMAL;
4253 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE
4254 || decl == error_mark_node)
4255 return error_mark_node;
4257 context = CP_DECL_CONTEXT (decl);
4258 if (context != global_namespace)
4259 *pushed_scope_p = push_scope (context);
4262 /* Is it valid for this decl to have an initializer at all?
4263 If not, set INITIALIZED to zero, which will indirectly
4264 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
4265 switch (TREE_CODE (decl))
4268 error ("typedef %qD is initialized (use decltype instead)", decl);
4269 return error_mark_node;
4272 if (initialized == SD_DELETED)
4273 /* We'll handle the rest of the semantics later, but we need to
4274 set this now so it's visible to duplicate_decls. */
4275 DECL_DELETED_FN (decl) = 1;
4284 if (! toplevel_bindings_p ()
4285 && DECL_EXTERNAL (decl))
4286 warning (0, "declaration of %q#D has %<extern%> and is initialized",
4288 DECL_EXTERNAL (decl) = 0;
4289 if (toplevel_bindings_p ())
4290 TREE_STATIC (decl) = 1;
4292 alias = lookup_attribute ("alias", DECL_ATTRIBUTES (decl)) != 0;
4294 if (alias && TREE_CODE (decl) == FUNCTION_DECL)
4295 record_key_method_defined (decl);
4297 /* If this is a typedef that names the class for linkage purposes
4298 (7.1.3p8), apply any attributes directly to the type. */
4299 if (TREE_CODE (decl) == TYPE_DECL
4300 && TAGGED_TYPE_P (TREE_TYPE (decl))
4301 && decl == TYPE_NAME (TYPE_MAIN_VARIANT (TREE_TYPE (decl))))
4302 flags = ATTR_FLAG_TYPE_IN_PLACE;
4306 /* Set attributes here so if duplicate decl, will have proper attributes. */
4307 cplus_decl_attributes (&decl, attributes, flags);
4309 /* Dllimported symbols cannot be defined. Static data members (which
4310 can be initialized in-class and dllimported) go through grokfield,
4311 not here, so we don't need to exclude those decls when checking for
4313 if (initialized && DECL_DLLIMPORT_P (decl))
4315 error ("definition of %q#D is marked %<dllimport%>", decl);
4316 DECL_DLLIMPORT_P (decl) = 0;
4319 /* If #pragma weak was used, mark the decl weak now. */
4320 maybe_apply_pragma_weak (decl);
4322 if (TREE_CODE (decl) == FUNCTION_DECL
4323 && DECL_DECLARED_INLINE_P (decl)
4324 && DECL_UNINLINABLE (decl)
4325 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
4326 warning (0, "inline function %q+D given attribute noinline", decl);
4328 if (TYPE_P (context) && COMPLETE_TYPE_P (complete_type (context)))
4330 if (TREE_CODE (decl) == VAR_DECL)
4332 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
4333 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
4334 error ("%q#D is not a static member of %q#T", decl, context);
4337 if (DECL_CONTEXT (field) != context)
4339 if (!same_type_p (DECL_CONTEXT (field), context))
4340 permerror (input_location, "ISO C++ does not permit %<%T::%D%> "
4341 "to be defined as %<%T::%D%>",
4342 DECL_CONTEXT (field), DECL_NAME (decl),
4343 context, DECL_NAME (decl));
4344 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
4346 if (processing_specialization
4347 && template_class_depth (context) == 0
4348 && CLASSTYPE_TEMPLATE_SPECIALIZATION (context))
4349 error ("template header not allowed in member definition "
4350 "of explicitly specialized class");
4351 /* Static data member are tricky; an in-class initialization
4352 still doesn't provide a definition, so the in-class
4353 declaration will have DECL_EXTERNAL set, but will have an
4354 initialization. Thus, duplicate_decls won't warn
4355 about this situation, and so we check here. */
4356 if (initialized && DECL_INITIALIZED_IN_CLASS_P (field))
4357 error ("duplicate initialization of %qD", decl);
4358 if (duplicate_decls (decl, field, /*newdecl_is_friend=*/false))
4360 if (declspecs->specs[(int) ds_constexpr]
4361 && !DECL_DECLARED_CONSTEXPR_P (field))
4362 error ("%qD declared %<constexpr%> outside its class", field);
4367 tree field = check_classfn (context, decl,
4368 (processing_template_decl
4369 > template_class_depth (context))
4370 ? current_template_parms
4372 if (field && field != error_mark_node
4373 && duplicate_decls (decl, field,
4374 /*newdecl_is_friend=*/false))
4378 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
4379 DECL_IN_AGGR_P (decl) = 0;
4380 /* Do not mark DECL as an explicit specialization if it was not
4381 already marked as an instantiation; a declaration should
4382 never be marked as a specialization unless we know what
4383 template is being specialized. */
4384 if (DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
4386 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
4388 /* [temp.expl.spec] An explicit specialization of a static data
4389 member of a template is a definition if the declaration
4390 includes an initializer; otherwise, it is a declaration.
4392 We check for processing_specialization so this only applies
4393 to the new specialization syntax. */
4394 if (!initialized && processing_specialization)
4395 DECL_EXTERNAL (decl) = 1;
4398 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl)
4399 /* Aliases are definitions. */
4401 permerror (input_location, "declaration of %q#D outside of class is not definition",
4405 was_public = TREE_PUBLIC (decl);
4407 /* Enter this declaration into the symbol table. */
4408 decl = maybe_push_decl (decl);
4410 if (processing_template_decl)
4411 decl = push_template_decl (decl);
4412 if (decl == error_mark_node)
4413 return error_mark_node;
4415 /* Tell the back end to use or not use .common as appropriate. If we say
4416 -fconserve-space, we want this to save .data space, at the expense of
4417 wrong semantics. If we say -fno-conserve-space, we want this to
4418 produce errors about redefs; to do this we force variables into the
4420 if (flag_conserve_space
4421 && TREE_CODE (decl) == VAR_DECL
4422 && TREE_PUBLIC (decl)
4423 && !DECL_THREAD_LOCAL_P (decl)
4424 && !have_global_bss_p ())
4425 DECL_COMMON (decl) = 1;
4427 if (TREE_CODE (decl) == VAR_DECL
4428 && DECL_NAMESPACE_SCOPE_P (decl) && !TREE_PUBLIC (decl) && !was_public
4429 && !DECL_THIS_STATIC (decl) && !DECL_ARTIFICIAL (decl))
4431 /* This is a const variable with implicit 'static'. Set
4432 DECL_THIS_STATIC so we can tell it from variables that are
4433 !TREE_PUBLIC because of the anonymous namespace. */
4434 gcc_assert (CP_TYPE_CONST_P (TREE_TYPE (decl)) || errorcount);
4435 DECL_THIS_STATIC (decl) = 1;
4438 if (!processing_template_decl && TREE_CODE (decl) == VAR_DECL)
4439 start_decl_1 (decl, initialized);
4444 /* Process the declaration of a variable DECL. INITIALIZED is true
4445 iff DECL is explicitly initialized. (INITIALIZED is false if the
4446 variable is initialized via an implicitly-called constructor.)
4447 This function must be called for ordinary variables (including, for
4448 example, implicit instantiations of templates), but must not be
4449 called for template declarations. */
4452 start_decl_1 (tree decl, bool initialized)
4456 bool aggregate_definition_p;
4458 gcc_assert (!processing_template_decl);
4460 if (error_operand_p (decl))
4463 gcc_assert (TREE_CODE (decl) == VAR_DECL);
4465 type = TREE_TYPE (decl);
4466 complete_p = COMPLETE_TYPE_P (type);
4467 aggregate_definition_p = MAYBE_CLASS_TYPE_P (type) && !DECL_EXTERNAL (decl);
4469 /* If an explicit initializer is present, or if this is a definition
4470 of an aggregate, then we need a complete type at this point.
4471 (Scalars are always complete types, so there is nothing to
4472 check.) This code just sets COMPLETE_P; errors (if necessary)
4473 are issued below. */
4474 if ((initialized || aggregate_definition_p)
4476 && COMPLETE_TYPE_P (complete_type (type)))
4479 /* We will not yet have set TREE_READONLY on DECL if the type
4480 was "const", but incomplete, before this point. But, now, we
4481 have a complete type, so we can try again. */
4482 cp_apply_type_quals_to_decl (cp_type_quals (type), decl);
4486 /* Is it valid for this decl to have an initializer at all? */
4488 /* Don't allow initializations for incomplete types except for
4489 arrays which might be completed by the initialization. */
4491 ; /* A complete type is ok. */
4492 else if (type_uses_auto (type))
4493 ; /* An auto type is ok. */
4494 else if (TREE_CODE (type) != ARRAY_TYPE)
4496 error ("variable %q#D has initializer but incomplete type", decl);
4497 type = TREE_TYPE (decl) = error_mark_node;
4499 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4501 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
4502 error ("elements of array %q#D have incomplete type", decl);
4503 /* else we already gave an error in start_decl. */
4506 else if (aggregate_definition_p && !complete_p)
4508 if (type_uses_auto (type))
4509 error ("declaration of %q#D has no initializer", decl);
4511 error ("aggregate %q#D has incomplete type and cannot be defined",
4513 /* Change the type so that assemble_variable will give
4514 DECL an rtl we can live with: (mem (const_int 0)). */
4515 type = TREE_TYPE (decl) = error_mark_node;
4518 /* Create a new scope to hold this declaration if necessary.
4519 Whether or not a new scope is necessary cannot be determined
4520 until after the type has been completed; if the type is a
4521 specialization of a class template it is not until after
4522 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
4523 will be set correctly. */
4524 maybe_push_cleanup_level (type);
4527 /* Handle initialization of references. DECL, TYPE, and INIT have the
4528 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
4529 but will be set to a new CLEANUP_STMT if a temporary is created
4530 that must be destroyed subsequently.
4532 Returns an initializer expression to use to initialize DECL, or
4533 NULL if the initialization can be performed statically.
4535 Quotes on semantics can be found in ARM 8.4.3. */
4538 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
4542 if (init == NULL_TREE)
4544 if ((DECL_LANG_SPECIFIC (decl) == 0
4545 || DECL_IN_AGGR_P (decl) == 0)
4546 && ! DECL_THIS_EXTERN (decl))
4547 error ("%qD declared as reference but not initialized", decl);
4551 if (TREE_CODE (init) == TREE_LIST)
4552 init = build_x_compound_expr_from_list (init, ELK_INIT,
4553 tf_warning_or_error);
4555 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
4556 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
4557 /* Note: default conversion is only called in very special cases. */
4558 init = decay_conversion (init);
4560 /* Convert INIT to the reference type TYPE. This may involve the
4561 creation of a temporary, whose lifetime must be the same as that
4562 of the reference. If so, a DECL_EXPR for the temporary will be
4563 added just after the DECL_EXPR for DECL. That's why we don't set
4564 DECL_INITIAL for local references (instead assigning to them
4565 explicitly); we need to allow the temporary to be initialized
4567 tmp = initialize_reference (type, init, decl, cleanup, tf_warning_or_error);
4569 if (tmp == error_mark_node)
4571 else if (tmp == NULL_TREE)
4573 error ("cannot initialize %qT from %qT", type, TREE_TYPE (init));
4577 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
4580 DECL_INITIAL (decl) = tmp;
4585 /* Subroutine of check_initializer. We're initializing a DECL of
4586 std::initializer_list<T> TYPE from a braced-init-list INIT, and need to
4587 extend the lifetime of the underlying array to match that of the decl,
4588 just like for reference initialization. CLEANUP is as for
4589 grok_reference_init. */
4592 build_init_list_var_init (tree decl, tree type, tree init, tree *array_init,
4595 tree aggr_init, array, arrtype;
4596 init = perform_implicit_conversion (type, init, tf_warning_or_error);
4597 if (error_operand_p (init))
4598 return error_mark_node;
4600 aggr_init = TARGET_EXPR_INITIAL (init);
4601 array = CONSTRUCTOR_ELT (aggr_init, 0)->value;
4602 arrtype = TREE_TYPE (array);
4604 gcc_assert (TREE_CODE (array) == ADDR_EXPR);
4605 array = TREE_OPERAND (array, 0);
4606 /* If the array is constant, finish_compound_literal already made it a
4607 static variable and we don't need to do anything here. */
4608 if (decl && TREE_CODE (array) == TARGET_EXPR)
4610 tree var = set_up_extended_ref_temp (decl, array, cleanup, array_init);
4611 var = build_address (var);
4612 var = convert (arrtype, var);
4613 CONSTRUCTOR_ELT (aggr_init, 0)->value = var;
4618 /* Designated initializers in arrays are not supported in GNU C++.
4619 The parser cannot detect this error since it does not know whether
4620 a given brace-enclosed initializer is for a class type or for an
4621 array. This function checks that CE does not use a designated
4622 initializer. If it does, an error is issued. Returns true if CE
4623 is valid, i.e., does not have a designated initializer. */
4626 check_array_designated_initializer (const constructor_elt *ce)
4628 /* Designated initializers for array elements are not supported. */
4631 /* The parser only allows identifiers as designated
4633 if (ce->index == error_mark_node)
4634 error ("name used in a GNU-style designated "
4635 "initializer for an array");
4636 else if (TREE_CODE (ce->index) == INTEGER_CST)
4637 /* An index added by reshape_init. */
4641 gcc_assert (TREE_CODE (ce->index) == IDENTIFIER_NODE);
4642 error ("name %qD used in a GNU-style designated "
4643 "initializer for an array", ce->index);
4651 /* When parsing `int a[] = {1, 2};' we don't know the size of the
4652 array until we finish parsing the initializer. If that's the
4653 situation we're in, update DECL accordingly. */
4656 maybe_deduce_size_from_array_init (tree decl, tree init)
4658 tree type = TREE_TYPE (decl);
4660 if (TREE_CODE (type) == ARRAY_TYPE
4661 && TYPE_DOMAIN (type) == NULL_TREE
4662 && TREE_CODE (decl) != TYPE_DECL)
4664 /* do_default is really a C-ism to deal with tentative definitions.
4665 But let's leave it here to ease the eventual merge. */
4666 int do_default = !DECL_EXTERNAL (decl);
4667 tree initializer = init ? init : DECL_INITIAL (decl);
4670 /* Check that there are no designated initializers in INIT, as
4671 those are not supported in GNU C++, and as the middle-end
4672 will crash if presented with a non-numeric designated
4674 if (initializer && TREE_CODE (initializer) == CONSTRUCTOR)
4676 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initializer);
4677 constructor_elt *ce;
4679 FOR_EACH_VEC_ELT (constructor_elt, v, i, ce)
4680 if (!check_array_designated_initializer (ce))
4686 failure = cp_complete_array_type (&TREE_TYPE (decl), initializer,
4690 error ("initializer fails to determine size of %qD", decl);
4691 TREE_TYPE (decl) = error_mark_node;
4693 else if (failure == 2)
4697 error ("array size missing in %qD", decl);
4698 TREE_TYPE (decl) = error_mark_node;
4700 /* If a `static' var's size isn't known, make it extern as
4701 well as static, so it does not get allocated. If it's not
4702 `static', then don't mark it extern; finish_incomplete_decl
4703 will give it a default size and it will get allocated. */
4704 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
4705 DECL_EXTERNAL (decl) = 1;
4707 else if (failure == 3)
4709 error ("zero-size array %qD", decl);
4710 TREE_TYPE (decl) = error_mark_node;
4714 cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
4716 relayout_decl (decl);
4720 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
4721 any appropriate error messages regarding the layout. */
4724 layout_var_decl (tree decl)
4728 type = TREE_TYPE (decl);
4729 if (type == error_mark_node)
4732 /* If we haven't already layed out this declaration, do so now.
4733 Note that we must not call complete type for an external object
4734 because it's type might involve templates that we are not
4735 supposed to instantiate yet. (And it's perfectly valid to say
4736 `extern X x' for some incomplete type `X'.) */
4737 if (!DECL_EXTERNAL (decl))
4738 complete_type (type);
4739 if (!DECL_SIZE (decl)
4740 && TREE_TYPE (decl) != error_mark_node
4741 && (COMPLETE_TYPE_P (type)
4742 || (TREE_CODE (type) == ARRAY_TYPE
4743 && !TYPE_DOMAIN (type)
4744 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
4745 layout_decl (decl, 0);
4747 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
4749 /* An automatic variable with an incomplete type: that is an error.
4750 Don't talk about array types here, since we took care of that
4751 message in grokdeclarator. */
4752 error ("storage size of %qD isn%'t known", decl);
4753 TREE_TYPE (decl) = error_mark_node;
4756 /* Keep this code around in case we later want to control debug info
4757 based on whether a type is "used". (jason 1999-11-11) */
4759 else if (!DECL_EXTERNAL (decl) && MAYBE_CLASS_TYPE_P (ttype))
4760 /* Let debugger know it should output info for this type. */
4761 note_debug_info_needed (ttype);
4763 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
4764 note_debug_info_needed (DECL_CONTEXT (decl));
4767 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
4768 && DECL_SIZE (decl) != NULL_TREE
4769 && ! TREE_CONSTANT (DECL_SIZE (decl)))
4771 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
4772 constant_expression_warning (DECL_SIZE (decl));
4775 error ("storage size of %qD isn%'t constant", decl);
4776 TREE_TYPE (decl) = error_mark_node;
4781 /* If a local static variable is declared in an inline function, or if
4782 we have a weak definition, we must endeavor to create only one
4783 instance of the variable at link-time. */
4786 maybe_commonize_var (tree decl)
4788 /* Static data in a function with comdat linkage also has comdat
4790 if (TREE_STATIC (decl)
4791 /* Don't mess with __FUNCTION__. */
4792 && ! DECL_ARTIFICIAL (decl)
4793 && DECL_FUNCTION_SCOPE_P (decl)
4794 && vague_linkage_p (DECL_CONTEXT (decl)))
4798 /* With weak symbols, we simply make the variable COMDAT;
4799 that will cause copies in multiple translations units to
4801 comdat_linkage (decl);
4805 if (DECL_INITIAL (decl) == NULL_TREE
4806 || DECL_INITIAL (decl) == error_mark_node)
4808 /* Without weak symbols, we can use COMMON to merge
4809 uninitialized variables. */
4810 TREE_PUBLIC (decl) = 1;
4811 DECL_COMMON (decl) = 1;
4815 /* While for initialized variables, we must use internal
4816 linkage -- which means that multiple copies will not
4818 TREE_PUBLIC (decl) = 0;
4819 DECL_COMMON (decl) = 0;
4820 warning_at (input_location, 0,
4821 "sorry: semantics of inline function static "
4822 "data %q+#D are wrong (you%'ll wind up "
4823 "with multiple copies)", decl);
4824 warning_at (DECL_SOURCE_LOCATION (decl), 0,
4825 " you can work around this by removing "
4830 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4831 /* Set it up again; we might have set DECL_INITIAL since the last
4833 comdat_linkage (decl);
4836 /* Issue an error message if DECL is an uninitialized const variable. */
4839 check_for_uninitialized_const_var (tree decl)
4841 tree type = strip_array_types (TREE_TYPE (decl));
4843 /* ``Unless explicitly declared extern, a const object does not have
4844 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4846 if (TREE_CODE (decl) == VAR_DECL
4847 && TREE_CODE (type) != REFERENCE_TYPE
4848 && CP_TYPE_CONST_P (type)
4849 && (!TYPE_NEEDS_CONSTRUCTING (type)
4850 || !type_has_user_provided_default_constructor (type))
4851 && !DECL_INITIAL (decl))
4853 permerror (DECL_SOURCE_LOCATION (decl),
4854 "uninitialized const %qD", decl);
4856 if (CLASS_TYPE_P (type)
4857 && !type_has_user_provided_default_constructor (type))
4859 tree defaulted_ctor;
4861 inform (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (type)),
4862 "%q#T has no user-provided default constructor", type);
4863 defaulted_ctor = in_class_defaulted_default_constructor (type);
4865 inform (DECL_SOURCE_LOCATION (defaulted_ctor),
4866 "constructor is not user-provided because it is "
4867 "explicitly defaulted in the class body");
4872 /* Structure holding the current initializer being processed by reshape_init.
4873 CUR is a pointer to the current element being processed, END is a pointer
4874 after the last element present in the initializer. */
4875 typedef struct reshape_iterator_t
4877 constructor_elt *cur;
4878 constructor_elt *end;
4881 static tree reshape_init_r (tree, reshape_iter *, bool);
4883 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4884 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4885 initialized. If there are no more such fields, the return value
4889 next_initializable_field (tree field)
4892 && (TREE_CODE (field) != FIELD_DECL
4893 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4894 || DECL_ARTIFICIAL (field)))
4895 field = DECL_CHAIN (field);
4900 /* Subroutine of reshape_init_array and reshape_init_vector, which does
4901 the actual work. ELT_TYPE is the element type of the array. MAX_INDEX is an
4902 INTEGER_CST representing the size of the array minus one (the maximum index),
4903 or NULL_TREE if the array was declared without specifying the size. D is
4904 the iterator within the constructor. */
4907 reshape_init_array_1 (tree elt_type, tree max_index, reshape_iter *d)
4910 bool sized_array_p = (max_index != NULL_TREE);
4911 unsigned HOST_WIDE_INT max_index_cst = 0;
4912 unsigned HOST_WIDE_INT index;
4914 /* The initializer for an array is always a CONSTRUCTOR. */
4915 new_init = build_constructor (init_list_type_node, NULL);
4919 /* Minus 1 is used for zero sized arrays. */
4920 if (integer_all_onesp (max_index))
4923 if (host_integerp (max_index, 1))
4924 max_index_cst = tree_low_cst (max_index, 1);
4925 /* sizetype is sign extended, not zero extended. */
4927 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4931 /* Loop until there are no more initializers. */
4933 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4938 check_array_designated_initializer (d->cur);
4939 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false);
4940 if (elt_init == error_mark_node)
4941 return error_mark_node;
4942 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init),
4943 size_int (index), elt_init);
4944 if (!TREE_CONSTANT (elt_init))
4945 TREE_CONSTANT (new_init) = false;
4951 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4952 Parameters are the same of reshape_init_r. */
4955 reshape_init_array (tree type, reshape_iter *d)
4957 tree max_index = NULL_TREE;
4959 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4961 if (TYPE_DOMAIN (type))
4962 max_index = array_type_nelts (type);
4964 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4967 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4968 Parameters are the same of reshape_init_r. */
4971 reshape_init_vector (tree type, reshape_iter *d)
4973 tree max_index = NULL_TREE;
4975 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4977 if (COMPOUND_LITERAL_P (d->cur->value))
4979 tree value = d->cur->value;
4980 if (!same_type_p (TREE_TYPE (value), type))
4982 error ("invalid type %qT as initializer for a vector of type %qT",
4983 TREE_TYPE (d->cur->value), type);
4984 value = error_mark_node;
4990 /* For a vector, we initialize it as an array of the appropriate size. */
4991 if (TREE_CODE (type) == VECTOR_TYPE)
4992 max_index = size_int (TYPE_VECTOR_SUBPARTS (type) - 1);
4994 return reshape_init_array_1 (TREE_TYPE (type), max_index, d);
4997 /* Subroutine of reshape_init_r, processes the initializers for classes
4998 or union. Parameters are the same of reshape_init_r. */
5001 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p)
5006 gcc_assert (CLASS_TYPE_P (type));
5008 /* The initializer for a class is always a CONSTRUCTOR. */
5009 new_init = build_constructor (init_list_type_node, NULL);
5010 field = next_initializable_field (TYPE_FIELDS (type));
5016 An initializer for an aggregate member that is an
5017 empty class shall have the form of an empty
5018 initializer-list {}. */
5019 if (!first_initializer_p)
5021 error ("initializer for %qT must be brace-enclosed", type);
5022 return error_mark_node;
5027 /* Loop through the initializable fields, gathering initializers. */
5028 while (d->cur != d->end)
5032 /* Handle designated initializers, as an extension. */
5035 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
5037 if (!field || TREE_CODE (field) != FIELD_DECL)
5039 error ("%qT has no non-static data member named %qD", type,
5041 return error_mark_node;
5045 /* If we processed all the member of the class, we are done. */
5049 field_init = reshape_init_r (TREE_TYPE (field), d,
5050 /*first_initializer_p=*/false);
5051 if (field_init == error_mark_node)
5052 return error_mark_node;
5054 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
5058 When a union is initialized with a brace-enclosed
5059 initializer, the braces shall only contain an
5060 initializer for the first member of the union. */
5061 if (TREE_CODE (type) == UNION_TYPE)
5064 field = next_initializable_field (DECL_CHAIN (field));
5070 /* Subroutine of reshape_init, which processes a single initializer (part of
5071 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5072 iterator within the CONSTRUCTOR which points to the initializer to process.
5073 FIRST_INITIALIZER_P is true if this is the first initializer of the
5074 outermost CONSTRUCTOR node. */
5077 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p)
5079 tree init = d->cur->value;
5081 if (error_operand_p (init))
5082 return error_mark_node;
5084 if (TREE_CODE (type) == COMPLEX_TYPE)
5086 /* A complex type can be initialized from one or two initializers,
5087 but braces are not elided. */
5089 if (BRACE_ENCLOSED_INITIALIZER_P (init))
5091 if (CONSTRUCTOR_NELTS (init) > 2)
5092 error ("too many initializers for %qT", type);
5094 else if (first_initializer_p && d->cur != d->end)
5096 VEC(constructor_elt, gc) *v = 0;
5097 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, init);
5098 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, d->cur->value);
5100 init = build_constructor (init_list_type_node, v);
5105 /* A non-aggregate type is always initialized with a single
5107 if (!CP_AGGREGATE_TYPE_P (type))
5109 /* It is invalid to initialize a non-aggregate type with a
5110 brace-enclosed initializer before C++0x.
5111 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5112 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5113 a CONSTRUCTOR (with a record type). */
5114 if (TREE_CODE (init) == CONSTRUCTOR
5115 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
5117 if (SCALAR_TYPE_P (type))
5119 error ("braces around scalar initializer for type %qT", type);
5120 init = error_mark_node;
5123 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
5132 All implicit type conversions (clause _conv_) are considered when
5133 initializing the aggregate member with an initializer from an
5134 initializer-list. If the initializer can initialize a member,
5135 the member is initialized. Otherwise, if the member is itself a
5136 non-empty subaggregate, brace elision is assumed and the
5137 initializer is considered for the initialization of the first
5138 member of the subaggregate. */
5139 if (TREE_CODE (init) != CONSTRUCTOR
5140 /* But don't try this for the first initializer, since that would be
5141 looking through the outermost braces; A a2 = { a1 }; is not a
5142 valid aggregate initialization. */
5143 && !first_initializer_p
5144 && (same_type_ignoring_top_level_qualifiers_p (type, TREE_TYPE (init))
5145 || can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL)))
5151 /* [dcl.init.string]
5153 A char array (whether plain char, signed char, or unsigned char)
5154 can be initialized by a string-literal (optionally enclosed in
5155 braces); a wchar_t array can be initialized by a wide
5156 string-literal (optionally enclosed in braces). */
5157 if (TREE_CODE (type) == ARRAY_TYPE
5158 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
5160 tree str_init = init;
5162 /* Strip one level of braces if and only if they enclose a single
5163 element (as allowed by [dcl.init.string]). */
5164 if (!first_initializer_p
5165 && TREE_CODE (str_init) == CONSTRUCTOR
5166 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
5168 str_init = VEC_index (constructor_elt,
5169 CONSTRUCTOR_ELTS (str_init), 0)->value;
5172 /* If it's a string literal, then it's the initializer for the array
5173 as a whole. Otherwise, continue with normal initialization for
5174 array types (one value per array element). */
5175 if (TREE_CODE (str_init) == STRING_CST)
5182 /* The following cases are about aggregates. If we are not within a full
5183 initializer already, and there is not a CONSTRUCTOR, it means that there
5184 is a missing set of braces (that is, we are processing the case for
5185 which reshape_init exists). */
5186 if (!first_initializer_p)
5188 if (TREE_CODE (init) == CONSTRUCTOR)
5190 if (TREE_TYPE (init) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init)))
5191 /* There is no need to reshape pointer-to-member function
5192 initializers, as they are always constructed correctly
5193 by the front end. */
5195 else if (COMPOUND_LITERAL_P (init))
5196 /* For a nested compound literal, there is no need to reshape since
5197 brace elision is not allowed. Even if we decided to allow it,
5198 we should add a call to reshape_init in finish_compound_literal,
5199 before calling digest_init, so changing this code would still
5200 not be necessary. */
5201 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
5205 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5206 return reshape_init (type, init);
5210 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
5214 /* Dispatch to specialized routines. */
5215 if (CLASS_TYPE_P (type))
5216 return reshape_init_class (type, d, first_initializer_p);
5217 else if (TREE_CODE (type) == ARRAY_TYPE)
5218 return reshape_init_array (type, d);
5219 else if (TREE_CODE (type) == VECTOR_TYPE)
5220 return reshape_init_vector (type, d);
5225 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5226 brace-enclosed aggregate initializer.
5228 INIT is the CONSTRUCTOR containing the list of initializers describing
5229 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5230 It may not presently match the shape of the TYPE; for example:
5232 struct S { int a; int b; };
5233 struct S a[] = { 1, 2, 3, 4 };
5235 Here INIT will hold a VEC of four elements, rather than a
5236 VEC of two elements, each itself a VEC of two elements. This
5237 routine transforms INIT from the former form into the latter. The
5238 revised CONSTRUCTOR node is returned. */
5241 reshape_init (tree type, tree init)
5243 VEC(constructor_elt, gc) *v;
5247 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5249 v = CONSTRUCTOR_ELTS (init);
5251 /* An empty constructor does not need reshaping, and it is always a valid
5253 if (VEC_empty (constructor_elt, v))
5256 /* Recurse on this CONSTRUCTOR. */
5257 d.cur = VEC_index (constructor_elt, v, 0);
5258 d.end = d.cur + VEC_length (constructor_elt, v);
5260 new_init = reshape_init_r (type, &d, true);
5261 if (new_init == error_mark_node)
5262 return error_mark_node;
5264 /* Make sure all the element of the constructor were used. Otherwise,
5265 issue an error about exceeding initializers. */
5267 error ("too many initializers for %qT", type);
5272 /* Verify array initializer. Returns true if errors have been reported. */
5275 check_array_initializer (tree decl, tree type, tree init)
5277 tree element_type = TREE_TYPE (type);
5279 /* The array type itself need not be complete, because the
5280 initializer may tell us how many elements are in the array.
5281 But, the elements of the array must be complete. */
5282 if (!COMPLETE_TYPE_P (complete_type (element_type)))
5285 error ("elements of array %q#D have incomplete type", decl);
5287 error ("elements of array %q#T have incomplete type", type);
5290 /* It is not valid to initialize a VLA. */
5292 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
5293 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
5296 error ("variable-sized object %qD may not be initialized", decl);
5298 error ("variable-sized compound literal");
5304 /* Subroutine of check_initializer; args are passed down from that function.
5305 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5308 build_aggr_init_full_exprs (tree decl, tree init, int flags)
5311 int saved_stmts_are_full_exprs_p = 0;
5312 if (building_stmt_tree ())
5314 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5315 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5317 init = build_aggr_init (decl, init, flags, tf_warning_or_error);
5318 if (building_stmt_tree ())
5319 current_stmt_tree ()->stmts_are_full_exprs_p =
5320 saved_stmts_are_full_exprs_p;
5324 /* Verify INIT (the initializer for DECL), and record the
5325 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5326 grok_reference_init.
5328 If the return value is non-NULL, it is an expression that must be
5329 evaluated dynamically to initialize DECL. */
5332 check_initializer (tree decl, tree init, int flags, tree *cleanup)
5334 tree type = TREE_TYPE (decl);
5335 tree init_code = NULL;
5336 tree extra_init = NULL_TREE;
5339 /* Things that are going to be initialized need to have complete
5341 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
5343 if (type == error_mark_node)
5344 /* We will have already complained. */
5347 if (TREE_CODE (type) == ARRAY_TYPE)
5349 if (check_array_initializer (decl, type, init))
5352 else if (!COMPLETE_TYPE_P (type))
5354 error ("%qD has incomplete type", decl);
5355 TREE_TYPE (decl) = error_mark_node;
5359 /* There is no way to make a variable-sized class type in GNU C++. */
5360 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
5362 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5364 int init_len = VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init));
5365 if (SCALAR_TYPE_P (type))
5369 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
5370 init = build_zero_init (type, NULL_TREE, false);
5372 else if (init_len != 1 && TREE_CODE (type) != COMPLEX_TYPE)
5374 error ("scalar object %qD requires one element in initializer",
5376 TREE_TYPE (decl) = error_mark_node;
5382 if (TREE_CODE (decl) == CONST_DECL)
5384 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
5386 DECL_INITIAL (decl) = init;
5388 gcc_assert (init != NULL_TREE);
5391 else if (!init && DECL_REALLY_EXTERN (decl))
5393 else if (TREE_CODE (type) == REFERENCE_TYPE)
5394 init = grok_reference_init (decl, type, init, cleanup);
5395 else if (init || TYPE_NEEDS_CONSTRUCTING (type))
5398 check_for_uninitialized_const_var (decl);
5399 /* Do not reshape constructors of vectors (they don't need to be
5401 else if (BRACE_ENCLOSED_INITIALIZER_P (init))
5403 if (is_std_init_list (type))
5404 init = build_init_list_var_init (decl, type, init,
5405 &extra_init, cleanup);
5406 else if (TYPE_NON_AGGREGATE_CLASS (type))
5408 /* Don't reshape if the class has constructors. */
5409 if (cxx_dialect == cxx98)
5410 error ("in C++98 %qD must be initialized by constructor, "
5414 else if (TREE_CODE (type) == VECTOR_TYPE && TYPE_VECTOR_OPAQUE (type))
5416 error ("opaque vector types cannot be initialized");
5417 init = error_mark_node;
5420 init = reshape_init (type, init);
5423 /* If DECL has an array type without a specific bound, deduce the
5424 array size from the initializer. */
5425 maybe_deduce_size_from_array_init (decl, init);
5426 type = TREE_TYPE (decl);
5427 if (type == error_mark_node)
5430 if (TYPE_NEEDS_CONSTRUCTING (type)
5431 || (CLASS_TYPE_P (type)
5432 && !(init && BRACE_ENCLOSED_INITIALIZER_P (init))))
5434 init_code = build_aggr_init_full_exprs (decl, init, flags);
5436 /* If this is a constexpr initializer, expand_default_init will
5437 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5438 case, pull the initializer back out and pass it down into
5439 store_init_value. */
5440 while (TREE_CODE (init_code) == EXPR_STMT
5441 || TREE_CODE (init_code) == CONVERT_EXPR)
5442 init_code = TREE_OPERAND (init_code, 0);
5443 if (TREE_CODE (init_code) == INIT_EXPR)
5445 init = TREE_OPERAND (init_code, 1);
5446 init_code = NULL_TREE;
5447 /* Don't call digest_init; it's unnecessary and will complain
5448 about aggregate initialization of non-aggregate classes. */
5449 flags |= LOOKUP_ALREADY_DIGESTED;
5451 else if (DECL_DECLARED_CONSTEXPR_P (decl))
5453 /* Declared constexpr, but no suitable initializer; massage
5454 init appropriately so we can pass it into store_init_value
5456 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5457 init = finish_compound_literal (type, init,
5458 tf_warning_or_error);
5459 else if (CLASS_TYPE_P (type)
5460 && (!init || TREE_CODE (init) == TREE_LIST))
5462 init = build_functional_cast (type, init, tf_none);
5463 if (init != error_mark_node)
5464 TARGET_EXPR_DIRECT_INIT_P (init) = true;
5466 init_code = NULL_TREE;
5472 if (init && TREE_CODE (init) != TREE_VEC)
5474 init_code = store_init_value (decl, init, flags);
5475 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
5476 && DECL_INITIAL (decl)
5477 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
5478 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
5479 warning (0, "array %qD initialized by parenthesized string literal %qE",
5480 decl, DECL_INITIAL (decl));
5486 if (CLASS_TYPE_P (core_type = strip_array_types (type))
5487 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type)
5488 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type)))
5489 diagnose_uninitialized_cst_or_ref_member (core_type, /*using_new=*/false,
5492 check_for_uninitialized_const_var (decl);
5495 if (init && init != error_mark_node)
5496 init_code = build2 (INIT_EXPR, type, decl, init);
5499 init_code = add_stmt_to_compound (extra_init, init_code);
5501 if (init_code && DECL_IN_AGGR_P (decl))
5503 static int explained = 0;
5505 if (cxx_dialect < cxx0x)
5506 error ("initializer invalid for static member with constructor");
5508 error ("non-constant in-class initialization invalid for static "
5509 "member %qD", decl);
5512 error ("(an out of class initialization is required)");
5520 /* If DECL is not a local variable, give it RTL. */
5523 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
5525 int toplev = toplevel_bindings_p ();
5527 const char *filename;
5529 /* Set the DECL_ASSEMBLER_NAME for the object. */
5532 /* The `register' keyword, when used together with an
5533 asm-specification, indicates that the variable should be
5534 placed in a particular register. */
5535 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
5537 set_user_assembler_name (decl, asmspec);
5538 DECL_HARD_REGISTER (decl) = 1;
5542 if (TREE_CODE (decl) == FUNCTION_DECL
5543 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
5544 set_builtin_user_assembler_name (decl, asmspec);
5545 set_user_assembler_name (decl, asmspec);
5549 /* Handle non-variables up front. */
5550 if (TREE_CODE (decl) != VAR_DECL)
5552 rest_of_decl_compilation (decl, toplev, at_eof);
5556 /* If we see a class member here, it should be a static data
5558 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
5560 gcc_assert (TREE_STATIC (decl));
5561 /* An in-class declaration of a static data member should be
5562 external; it is only a declaration, and not a definition. */
5563 if (init == NULL_TREE)
5564 gcc_assert (DECL_EXTERNAL (decl) || !TREE_PUBLIC (decl));
5567 /* We don't create any RTL for local variables. */
5568 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5571 /* We defer emission of local statics until the corresponding
5572 DECL_EXPR is expanded. */
5573 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
5575 /* We try to defer namespace-scope static constants so that they are
5576 not emitted into the object file unnecessarily. */
5577 filename = input_filename;
5578 if (!DECL_VIRTUAL_P (decl)
5579 && TREE_READONLY (decl)
5580 && DECL_INITIAL (decl) != NULL_TREE
5581 && DECL_INITIAL (decl) != error_mark_node
5583 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
5585 && !TREE_PUBLIC (decl))
5587 /* Fool with the linkage of static consts according to #pragma
5589 struct c_fileinfo *finfo = get_fileinfo (filename);
5590 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
5592 TREE_PUBLIC (decl) = 1;
5593 DECL_EXTERNAL (decl) = finfo->interface_only;
5598 /* Likewise for template instantiations. */
5599 else if (DECL_LANG_SPECIFIC (decl)
5600 && DECL_IMPLICIT_INSTANTIATION (decl))
5603 /* If we're not deferring, go ahead and assemble the variable. */
5605 rest_of_decl_compilation (decl, toplev, at_eof);
5608 /* walk_tree helper for wrap_temporary_cleanups, below. */
5611 wrap_cleanups_r (tree *stmt_p, int *walk_subtrees, void *data)
5613 if (TYPE_P (*stmt_p))
5619 if (TREE_CODE (*stmt_p) == TARGET_EXPR)
5621 tree guard = (tree)data;
5622 tree tcleanup = TARGET_EXPR_CLEANUP (*stmt_p);
5624 tcleanup = build2 (TRY_CATCH_EXPR, void_type_node, tcleanup, guard);
5625 /* Tell honor_protect_cleanup_actions to handle this as a separate
5627 TRY_CATCH_IS_CLEANUP (tcleanup) = 1;
5629 TARGET_EXPR_CLEANUP (*stmt_p) = tcleanup;
5635 /* We're initializing a local variable which has a cleanup GUARD. If there
5636 are any temporaries used in the initializer INIT of this variable, we
5637 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5638 variable will be cleaned up properly if one of them throws.
5640 Unfortunately, there's no way to express this properly in terms of
5641 nesting, as the regions for the temporaries overlap the region for the
5642 variable itself; if there are two temporaries, the variable needs to be
5643 the first thing destroyed if either of them throws. However, we only
5644 want to run the variable's cleanup if it actually got constructed. So
5645 we need to guard the temporary cleanups with the variable's cleanup if
5646 they are run on the normal path, but not if they are run on the
5647 exceptional path. We implement this by telling
5648 honor_protect_cleanup_actions to strip the variable cleanup from the
5649 exceptional path. */
5652 wrap_temporary_cleanups (tree init, tree guard)
5654 cp_walk_tree_without_duplicates (&init, wrap_cleanups_r, (void *)guard);
5657 /* Generate code to initialize DECL (a local variable). */
5660 initialize_local_var (tree decl, tree init)
5662 tree type = TREE_TYPE (decl);
5666 gcc_assert (TREE_CODE (decl) == VAR_DECL
5667 || TREE_CODE (decl) == RESULT_DECL);
5668 gcc_assert (!TREE_STATIC (decl));
5670 if (DECL_SIZE (decl) == NULL_TREE)
5672 /* If we used it already as memory, it must stay in memory. */
5673 DECL_INITIAL (decl) = NULL_TREE;
5674 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
5678 if (type == error_mark_node)
5681 /* Compute and store the initial value. */
5682 already_used = TREE_USED (decl) || TREE_USED (type);
5683 if (TREE_USED (type))
5684 DECL_READ_P (decl) = 1;
5686 /* Generate a cleanup, if necessary. */
5687 cleanup = cxx_maybe_build_cleanup (decl, tf_warning_or_error);
5689 /* Perform the initialization. */
5692 int saved_stmts_are_full_exprs_p;
5694 /* If we're only initializing a single object, guard the destructors
5695 of any temporaries used in its initializer with its destructor.
5696 This isn't right for arrays because each element initialization is
5697 a full-expression. */
5698 if (cleanup && TREE_CODE (type) != ARRAY_TYPE)
5699 wrap_temporary_cleanups (init, cleanup);
5701 gcc_assert (building_stmt_tree ());
5702 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5703 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5704 finish_expr_stmt (init);
5705 current_stmt_tree ()->stmts_are_full_exprs_p =
5706 saved_stmts_are_full_exprs_p;
5709 /* Set this to 0 so we can tell whether an aggregate which was
5710 initialized was ever used. Don't do this if it has a
5711 destructor, so we don't complain about the 'resource
5712 allocation is initialization' idiom. Now set
5713 attribute((unused)) on types so decls of that type will be
5714 marked used. (see TREE_USED, above.) */
5715 if (TYPE_NEEDS_CONSTRUCTING (type)
5717 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5718 && DECL_NAME (decl))
5719 TREE_USED (decl) = 0;
5720 else if (already_used)
5721 TREE_USED (decl) = 1;
5724 finish_decl_cleanup (decl, cleanup);
5727 /* DECL is a VAR_DECL for a compiler-generated variable with static
5728 storage duration (like a virtual table) whose initializer is a
5729 compile-time constant. Initialize the variable and provide it to the
5733 initialize_artificial_var (tree decl, VEC(constructor_elt,gc) *v)
5736 gcc_assert (DECL_ARTIFICIAL (decl));
5737 init = build_constructor (TREE_TYPE (decl), v);
5738 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5739 DECL_INITIAL (decl) = init;
5740 DECL_INITIALIZED_P (decl) = 1;
5741 determine_visibility (decl);
5742 layout_var_decl (decl);
5743 maybe_commonize_var (decl);
5744 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5747 /* INIT is the initializer for a variable, as represented by the
5748 parser. Returns true iff INIT is type-dependent. */
5751 type_dependent_init_p (tree init)
5753 if (TREE_CODE (init) == TREE_LIST)
5754 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5755 return any_type_dependent_elements_p (init);
5756 else if (TREE_CODE (init) == CONSTRUCTOR)
5757 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5759 VEC(constructor_elt, gc) *elts;
5763 elts = CONSTRUCTOR_ELTS (init);
5764 nelts = VEC_length (constructor_elt, elts);
5765 for (i = 0; i < nelts; ++i)
5766 if (type_dependent_init_p (VEC_index (constructor_elt,
5771 /* It must be a simple expression, e.g., int i = 3; */
5772 return type_dependent_expression_p (init);
5777 /* INIT is the initializer for a variable, as represented by the
5778 parser. Returns true iff INIT is value-dependent. */
5781 value_dependent_init_p (tree init)
5783 if (TREE_CODE (init) == TREE_LIST)
5784 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5785 return any_value_dependent_elements_p (init);
5786 else if (TREE_CODE (init) == CONSTRUCTOR)
5787 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5789 VEC(constructor_elt, gc) *elts;
5793 elts = CONSTRUCTOR_ELTS (init);
5794 nelts = VEC_length (constructor_elt, elts);
5795 for (i = 0; i < nelts; ++i)
5796 if (value_dependent_init_p (VEC_index (constructor_elt,
5801 /* It must be a simple expression, e.g., int i = 3; */
5802 return value_dependent_expression_p (init);
5807 /* Finish processing of a declaration;
5808 install its line number and initial value.
5809 If the length of an array type is not known before,
5810 it must be determined now, from the initial value, or it is an error.
5812 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5813 true, then INIT is an integral constant expression.
5815 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5816 if the (init) syntax was used. */
5819 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5820 tree asmspec_tree, int flags)
5824 const char *asmspec = NULL;
5825 int was_readonly = 0;
5826 bool var_definition_p = false;
5829 if (decl == error_mark_node)
5834 error ("assignment (not initialization) in declaration");
5838 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5839 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5840 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5842 type = TREE_TYPE (decl);
5843 if (type == error_mark_node)
5846 /* Assume no cleanup is required. */
5847 cleanup = NULL_TREE;
5849 /* If a name was specified, get the string. */
5850 if (global_scope_p (current_binding_level))
5851 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5852 if (asmspec_tree && asmspec_tree != error_mark_node)
5853 asmspec = TREE_STRING_POINTER (asmspec_tree);
5855 if (current_class_type
5856 && CP_DECL_CONTEXT (decl) == current_class_type
5857 && TYPE_BEING_DEFINED (current_class_type)
5858 && (DECL_INITIAL (decl) || init))
5859 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5861 auto_node = type_uses_auto (type);
5865 if (init == NULL_TREE)
5867 error ("declaration of %q#D has no initializer", decl);
5868 TREE_TYPE (decl) = error_mark_node;
5872 if (TREE_CODE (d_init) == TREE_LIST)
5873 d_init = build_x_compound_expr_from_list (d_init, ELK_INIT,
5874 tf_warning_or_error);
5875 d_init = resolve_nondeduced_context (d_init);
5876 if (describable_type (d_init))
5878 type = TREE_TYPE (decl) = do_auto_deduction (type, d_init,
5880 if (type == error_mark_node)
5885 if (TREE_CODE (decl) == FUNCTION_DECL
5886 /* For members, defer until finalize_literal_type_property. */
5887 && (!DECL_CLASS_SCOPE_P (decl)
5888 || !TYPE_BEING_DEFINED (DECL_CONTEXT (decl))))
5889 validate_constexpr_fundecl (decl);
5891 else if (!ensure_literal_type_for_constexpr_object (decl))
5892 DECL_DECLARED_CONSTEXPR_P (decl) = 0;
5894 if (init && TREE_CODE (decl) == FUNCTION_DECL)
5897 if (init == ridpointers[(int)RID_DELETE])
5899 /* FIXME check this is 1st decl. */
5900 DECL_DELETED_FN (decl) = 1;
5901 DECL_DECLARED_INLINE_P (decl) = 1;
5902 DECL_INITIAL (decl) = error_mark_node;
5903 FOR_EACH_CLONE (clone, decl)
5905 DECL_DELETED_FN (clone) = 1;
5906 DECL_DECLARED_INLINE_P (clone) = 1;
5907 DECL_INITIAL (clone) = error_mark_node;
5911 else if (init == ridpointers[(int)RID_DEFAULT])
5913 if (defaultable_fn_check (decl))
5914 DECL_DEFAULTED_FN (decl) = 1;
5916 DECL_INITIAL (decl) = NULL_TREE;
5920 if (init && TREE_CODE (decl) == VAR_DECL)
5922 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5923 if (init_const_expr_p)
5925 /* Set these flags now for templates. We'll update the flags in
5926 store_init_value for instantiations. */
5927 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5928 if (decl_maybe_constant_var_p (decl))
5929 TREE_CONSTANT (decl) = 1;
5933 if (processing_template_decl)
5935 bool type_dependent_p;
5937 /* Add this declaration to the statement-tree. */
5938 if (at_function_scope_p ())
5939 add_decl_expr (decl);
5941 type_dependent_p = dependent_type_p (type);
5943 if (check_for_bare_parameter_packs (init))
5946 DECL_INITIAL (decl) = NULL_TREE;
5949 /* Generally, initializers in templates are expanded when the
5950 template is instantiated. But, if DECL is a variable constant
5951 then it can be used in future constant expressions, so its value
5952 must be available. */
5954 if (TREE_CODE (decl) != VAR_DECL || dependent_type_p (type))
5955 /* We can't do anything if the decl has dependent type. */;
5957 && init_const_expr_p
5958 && !type_dependent_p
5959 && decl_maybe_constant_var_p (decl)
5960 && !type_dependent_init_p (init)
5961 && !value_dependent_init_p (init))
5963 /* This variable seems to be a non-dependent constant, so process
5964 its initializer. If check_initializer returns non-null the
5965 initialization wasn't constant after all. */
5966 tree init_code = check_initializer (decl, init, flags, &cleanup);
5967 if (init_code == NULL_TREE)
5970 else if (!DECL_PRETTY_FUNCTION_P (decl))
5971 /* Deduce array size even if the initializer is dependent. */
5972 maybe_deduce_size_from_array_init (decl, init);
5975 DECL_INITIAL (decl) = init;
5979 /* Take care of TYPE_DECLs up front. */
5980 if (TREE_CODE (decl) == TYPE_DECL)
5982 if (type != error_mark_node
5983 && MAYBE_CLASS_TYPE_P (type) && DECL_NAME (decl))
5985 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
5986 warning (0, "shadowing previous type declaration of %q#D", decl);
5987 set_identifier_type_value (DECL_NAME (decl), decl);
5990 /* If we have installed this as the canonical typedef for this
5991 type, and that type has not been defined yet, delay emitting
5992 the debug information for it, as we will emit it later. */
5993 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
5994 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
5995 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
5997 rest_of_decl_compilation (decl, DECL_FILE_SCOPE_P (decl),
6002 /* A reference will be modified here, as it is initialized. */
6003 if (! DECL_EXTERNAL (decl)
6004 && TREE_READONLY (decl)
6005 && TREE_CODE (type) == REFERENCE_TYPE)
6008 TREE_READONLY (decl) = 0;
6011 if (TREE_CODE (decl) == VAR_DECL)
6013 /* Only variables with trivial initialization and destruction can
6014 have thread-local storage. */
6015 if (DECL_THREAD_LOCAL_P (decl)
6016 && (type_has_nontrivial_default_init (TREE_TYPE (decl))
6017 || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
6018 error ("%qD cannot be thread-local because it has non-trivial "
6019 "type %qT", decl, TREE_TYPE (decl));
6020 /* If this is a local variable that will need a mangled name,
6021 register it now. We must do this before processing the
6022 initializer for the variable, since the initialization might
6023 require a guard variable, and since the mangled name of the
6024 guard variable will depend on the mangled name of this
6026 if (DECL_FUNCTION_SCOPE_P (decl)
6027 && TREE_STATIC (decl)
6028 && !DECL_ARTIFICIAL (decl))
6030 push_local_name (decl);
6031 if (DECL_CONSTRUCTOR_P (current_function_decl)
6032 || DECL_DESTRUCTOR_P (current_function_decl))
6033 /* Normally local_decls is populated during GIMPLE lowering,
6034 but [cd]tors are never actually compiled directly. We need
6035 to put statics on the list so we can deal with the label
6036 address extension. */
6037 add_local_decl (cfun, decl);
6040 /* Convert the initializer to the type of DECL, if we have not
6041 already initialized DECL. */
6042 if (!DECL_INITIALIZED_P (decl)
6043 /* If !DECL_EXTERNAL then DECL is being defined. In the
6044 case of a static data member initialized inside the
6045 class-specifier, there can be an initializer even if DECL
6046 is *not* defined. */
6047 && (!DECL_EXTERNAL (decl) || init))
6049 if (TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
6052 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6053 /* Allow libjava/prims.cc define primitive classes. */
6054 if (init != NULL_TREE
6055 || jclass == NULL_TREE
6056 || TREE_CODE (jclass) != TYPE_DECL
6057 || !POINTER_TYPE_P (TREE_TYPE (jclass))
6058 || !same_type_ignoring_top_level_qualifiers_p
6059 (type, TREE_TYPE (TREE_TYPE (jclass))))
6060 error ("Java object %qD not allocated with %<new%>", decl);
6063 init = check_initializer (decl, init, flags, &cleanup);
6064 /* Thread-local storage cannot be dynamically initialized. */
6065 if (DECL_THREAD_LOCAL_P (decl) && init)
6067 error ("%qD is thread-local and so cannot be dynamically "
6068 "initialized", decl);
6072 /* Check that the initializer for a static data member was a
6073 constant. Although we check in the parser that the
6074 initializer is an integral constant expression, we do not
6075 simplify division-by-zero at the point at which it
6076 occurs. Therefore, in:
6078 struct S { static const int i = 7 / 0; };
6080 we issue an error at this point. It would
6081 probably be better to forbid division by zero in
6082 integral constant expressions. */
6083 if (DECL_EXTERNAL (decl) && init)
6085 error ("%qD cannot be initialized by a non-constant expression"
6086 " when being declared", decl);
6087 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
6095 The memory occupied by any object of static storage
6096 duration is zero-initialized at program startup before
6097 any other initialization takes place.
6099 We cannot create an appropriate initializer until after
6100 the type of DECL is finalized. If DECL_INITIAL is set,
6101 then the DECL is statically initialized, and any
6102 necessary zero-initialization has already been performed. */
6103 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
6104 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
6105 /*nelts=*/NULL_TREE,
6106 /*static_storage_p=*/true);
6107 /* Remember that the initialization for this variable has
6109 DECL_INITIALIZED_P (decl) = 1;
6110 /* This declaration is the definition of this variable,
6111 unless we are initializing a static data member within
6112 the class specifier. */
6113 if (!DECL_EXTERNAL (decl))
6114 var_definition_p = true;
6116 /* If the variable has an array type, lay out the type, even if
6117 there is no initializer. It is valid to index through the
6118 array, and we must get TYPE_ALIGN set correctly on the array
6120 else if (TREE_CODE (type) == ARRAY_TYPE)
6123 if (TREE_STATIC (decl)
6124 && !at_function_scope_p ()
6125 && current_function_decl == NULL)
6126 /* So decl is a global variable or a static member of a
6127 non local class. Record the types it uses
6128 so that we can decide later to emit debug info for them. */
6129 record_types_used_by_current_var_decl (decl);
6131 else if (TREE_CODE (decl) == FIELD_DECL
6132 && TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
6133 error ("non-static data member %qD has Java class type", decl);
6135 /* Add this declaration to the statement-tree. This needs to happen
6136 after the call to check_initializer so that the DECL_EXPR for a
6137 reference temp is added before the DECL_EXPR for the reference itself. */
6138 if (at_function_scope_p ())
6139 add_decl_expr (decl);
6141 /* Let the middle end know about variables and functions -- but not
6142 static data members in uninstantiated class templates. */
6143 if (TREE_CODE (decl) == VAR_DECL
6144 || TREE_CODE (decl) == FUNCTION_DECL)
6146 if (TREE_CODE (decl) == VAR_DECL)
6148 layout_var_decl (decl);
6149 maybe_commonize_var (decl);
6152 /* This needs to happen after the linkage is set. */
6153 determine_visibility (decl);
6155 if (var_definition_p && TREE_STATIC (decl))
6157 /* If a TREE_READONLY variable needs initialization
6158 at runtime, it is no longer readonly and we need to
6159 avoid MEM_READONLY_P being set on RTL created for it. */
6162 if (TREE_READONLY (decl))
6163 TREE_READONLY (decl) = 0;
6166 else if (was_readonly)
6167 TREE_READONLY (decl) = 1;
6170 make_rtl_for_nonlocal_decl (decl, init, asmspec);
6172 /* Check for abstractness of the type. Notice that there is no
6173 need to strip array types here since the check for those types
6174 is already done within create_array_type_for_decl. */
6175 if (TREE_CODE (type) == FUNCTION_TYPE
6176 || TREE_CODE (type) == METHOD_TYPE)
6177 abstract_virtuals_error (decl, TREE_TYPE (type));
6179 abstract_virtuals_error (decl, type);
6181 if (TREE_TYPE (decl) == error_mark_node)
6182 /* No initialization required. */
6184 else if (TREE_CODE (decl) == FUNCTION_DECL)
6188 if (init == ridpointers[(int)RID_DEFAULT])
6190 /* An out-of-class default definition is defined at
6191 the point where it is explicitly defaulted. */
6192 if (DECL_DELETED_FN (decl))
6193 maybe_explain_implicit_delete (decl);
6194 else if (DECL_INITIAL (decl) == error_mark_node)
6195 synthesize_method (decl);
6198 error ("function %q#D is initialized like a variable", decl);
6200 /* else no initialization required. */
6202 else if (DECL_EXTERNAL (decl)
6203 && ! (DECL_LANG_SPECIFIC (decl)
6204 && DECL_NOT_REALLY_EXTERN (decl)))
6207 DECL_INITIAL (decl) = init;
6209 /* A variable definition. */
6210 else if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
6211 /* Initialize the local variable. */
6212 initialize_local_var (decl, init);
6214 /* If a variable is defined, and then a subsequent
6215 definition with external linkage is encountered, we will
6216 get here twice for the same variable. We want to avoid
6217 calling expand_static_init more than once. For variables
6218 that are not static data members, we can call
6219 expand_static_init only when we actually process the
6220 initializer. It is not legal to redeclare a static data
6221 member, so this issue does not arise in that case. */
6222 else if (var_definition_p && TREE_STATIC (decl))
6223 expand_static_init (decl, init);
6226 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6227 reference, insert it in the statement-tree now. */
6229 push_cleanup (decl, cleanup, false);
6232 TREE_READONLY (decl) = 1;
6235 /* Returns a declaration for a VAR_DECL as if:
6237 extern "C" TYPE NAME;
6239 had been seen. Used to create compiler-generated global
6243 declare_global_var (tree name, tree type)
6247 push_to_top_level ();
6248 decl = build_decl (input_location, VAR_DECL, name, type);
6249 TREE_PUBLIC (decl) = 1;
6250 DECL_EXTERNAL (decl) = 1;
6251 DECL_ARTIFICIAL (decl) = 1;
6252 /* If the user has explicitly declared this variable (perhaps
6253 because the code we are compiling is part of a low-level runtime
6254 library), then it is possible that our declaration will be merged
6255 with theirs by pushdecl. */
6256 decl = pushdecl (decl);
6257 cp_finish_decl (decl, NULL_TREE, false, NULL_TREE, 0);
6258 pop_from_top_level ();
6263 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6264 if "__cxa_atexit" is not being used) corresponding to the function
6265 to be called when the program exits. */
6268 get_atexit_fn_ptr_type (void)
6272 if (!atexit_fn_ptr_type_node)
6275 if (flag_use_cxa_atexit
6276 && !targetm.cxx.use_atexit_for_cxa_atexit ())
6277 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6278 arg_type = ptr_type_node;
6280 /* The parameter to "atexit" is "void (*)(void)". */
6281 arg_type = NULL_TREE;
6283 fn_type = build_function_type_list (void_type_node,
6284 arg_type, NULL_TREE);
6285 atexit_fn_ptr_type_node = build_pointer_type (fn_type);
6288 return atexit_fn_ptr_type_node;
6291 /* Returns a pointer to the `atexit' function. Note that if
6292 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6293 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6296 get_atexit_node (void)
6302 bool use_aeabi_atexit;
6307 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6309 /* The declaration for `__cxa_atexit' is:
6311 int __cxa_atexit (void (*)(void *), void *, void *)
6313 We build up the argument types and then the function type
6315 tree argtype0, argtype1, argtype2;
6317 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
6318 /* First, build the pointer-to-function type for the first
6320 fn_ptr_type = get_atexit_fn_ptr_type ();
6321 /* Then, build the rest of the argument types. */
6322 argtype2 = ptr_type_node;
6323 if (use_aeabi_atexit)
6325 argtype1 = fn_ptr_type;
6326 argtype0 = ptr_type_node;
6330 argtype1 = ptr_type_node;
6331 argtype0 = fn_ptr_type;
6333 /* And the final __cxa_atexit type. */
6334 fn_type = build_function_type_list (integer_type_node,
6335 argtype0, argtype1, argtype2,
6337 fn_ptr_type = build_pointer_type (fn_type);
6338 if (use_aeabi_atexit)
6339 name = "__aeabi_atexit";
6341 name = "__cxa_atexit";
6345 /* The declaration for `atexit' is:
6347 int atexit (void (*)());
6349 We build up the argument types and then the function type
6351 fn_ptr_type = get_atexit_fn_ptr_type ();
6352 /* Build the final atexit type. */
6353 fn_type = build_function_type_list (integer_type_node,
6354 fn_ptr_type, NULL_TREE);
6358 /* Now, build the function declaration. */
6359 push_lang_context (lang_name_c);
6360 atexit_fndecl = build_library_fn_ptr (name, fn_type);
6361 mark_used (atexit_fndecl);
6362 pop_lang_context ();
6363 atexit_node = decay_conversion (atexit_fndecl);
6368 /* Returns the __dso_handle VAR_DECL. */
6371 get_dso_handle_node (void)
6373 if (dso_handle_node)
6374 return dso_handle_node;
6376 /* Declare the variable. */
6377 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
6380 return dso_handle_node;
6383 /* Begin a new function with internal linkage whose job will be simply
6384 to destroy some particular variable. */
6386 static GTY(()) int start_cleanup_cnt;
6389 start_cleanup_fn (void)
6394 bool use_cxa_atexit = flag_use_cxa_atexit
6395 && !targetm.cxx.use_atexit_for_cxa_atexit ();
6397 push_to_top_level ();
6399 /* No need to mangle this. */
6400 push_lang_context (lang_name_c);
6402 /* Build the name of the function. */
6403 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
6404 /* Build the function declaration. */
6405 fntype = TREE_TYPE (get_atexit_fn_ptr_type ());
6406 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
6407 /* It's a function with internal linkage, generated by the
6409 TREE_PUBLIC (fndecl) = 0;
6410 DECL_ARTIFICIAL (fndecl) = 1;
6411 /* Make the function `inline' so that it is only emitted if it is
6412 actually needed. It is unlikely that it will be inlined, since
6413 it is only called via a function pointer, but we avoid unnecessary
6414 emissions this way. */
6415 DECL_DECLARED_INLINE_P (fndecl) = 1;
6416 DECL_INTERFACE_KNOWN (fndecl) = 1;
6417 /* Build the parameter. */
6422 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
6423 DECL_CONTEXT (parmdecl) = fndecl;
6424 TREE_USED (parmdecl) = 1;
6425 DECL_READ_P (parmdecl) = 1;
6426 DECL_ARGUMENTS (fndecl) = parmdecl;
6430 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
6432 pop_lang_context ();
6434 return current_function_decl;
6437 /* Finish the cleanup function begun by start_cleanup_fn. */
6440 end_cleanup_fn (void)
6442 expand_or_defer_fn (finish_function (0));
6444 pop_from_top_level ();
6447 /* Generate code to handle the destruction of DECL, an object with
6448 static storage duration. */
6451 register_dtor_fn (tree decl)
6458 tree arg0, arg1 = NULL_TREE, arg2 = NULL_TREE;
6460 type = TREE_TYPE (decl);
6461 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
6462 return void_zero_node;
6464 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6465 a class object, we can just pass the destructor to
6466 "__cxa_atexit"; we don't have to build a temporary function to do
6468 use_dtor = (flag_use_cxa_atexit
6469 && !targetm.cxx.use_atexit_for_cxa_atexit ()
6470 && CLASS_TYPE_P (type));
6475 /* Find the destructor. */
6476 idx = lookup_fnfields_1 (type, complete_dtor_identifier);
6477 gcc_assert (idx >= 0);
6478 cleanup = VEC_index (tree, CLASSTYPE_METHOD_VEC (type), idx);
6479 /* Make sure it is accessible. */
6480 perform_or_defer_access_check (TYPE_BINFO (type), cleanup, cleanup);
6484 /* Call build_cleanup before we enter the anonymous function so
6485 that any access checks will be done relative to the current
6486 scope, rather than the scope of the anonymous function. */
6487 build_cleanup (decl);
6489 /* Now start the function. */
6490 cleanup = start_cleanup_fn ();
6492 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6493 to the original function, rather than the anonymous one. That
6494 will make the back end think that nested functions are in use,
6495 which causes confusion. */
6496 push_deferring_access_checks (dk_no_check);
6497 fcall = build_cleanup (decl);
6498 pop_deferring_access_checks ();
6500 /* Create the body of the anonymous function. */
6501 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
6502 finish_expr_stmt (fcall);
6503 finish_compound_stmt (compound_stmt);
6507 /* Call atexit with the cleanup function. */
6508 mark_used (cleanup);
6509 cleanup = build_address (cleanup);
6510 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6516 /* We must convert CLEANUP to the type that "__cxa_atexit"
6518 cleanup = build_nop (get_atexit_fn_ptr_type (), cleanup);
6519 /* "__cxa_atexit" will pass the address of DECL to the
6520 cleanup function. */
6522 addr = build_address (decl);
6523 /* The declared type of the parameter to "__cxa_atexit" is
6524 "void *". For plain "T*", we could just let the
6525 machinery in cp_build_function_call convert it -- but if the
6526 type is "cv-qualified T *", then we need to convert it
6527 before passing it in, to avoid spurious errors. */
6528 addr = build_nop (ptr_type_node, addr);
6531 /* Since the cleanup functions we build ignore the address
6532 they're given, there's no reason to pass the actual address
6533 in, and, in general, it's cheaper to pass NULL than any
6535 addr = null_pointer_node;
6536 arg2 = cp_build_addr_expr (get_dso_handle_node (),
6537 tf_warning_or_error);
6538 if (targetm.cxx.use_aeabi_atexit ())
6551 return cp_build_function_call_nary (get_atexit_node (), tf_warning_or_error,
6552 arg0, arg1, arg2, NULL_TREE);
6555 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6556 is its initializer. Generate code to handle the construction
6557 and destruction of DECL. */
6560 expand_static_init (tree decl, tree init)
6562 gcc_assert (TREE_CODE (decl) == VAR_DECL);
6563 gcc_assert (TREE_STATIC (decl));
6565 /* Some variables require no dynamic initialization. */
6567 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
6570 if (DECL_FUNCTION_SCOPE_P (decl))
6572 /* Emit code to perform this initialization but once. */
6573 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
6574 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
6575 tree guard, guard_addr;
6576 tree acquire_fn, release_fn, abort_fn;
6579 /* Emit code to perform this initialization but once. This code
6582 static <type> guard;
6583 if (!guard.first_byte) {
6584 if (__cxa_guard_acquire (&guard)) {
6587 // Do initialization.
6588 flag = true; __cxa_guard_release (&guard);
6589 // Register variable for destruction at end of program.
6591 if (!flag) __cxa_guard_abort (&guard);
6595 Note that the `flag' variable is only set to 1 *after* the
6596 initialization is complete. This ensures that an exception,
6597 thrown during the construction, will cause the variable to
6598 reinitialized when we pass through this code again, as per:
6602 If the initialization exits by throwing an exception, the
6603 initialization is not complete, so it will be tried again
6604 the next time control enters the declaration.
6606 This process should be thread-safe, too; multiple threads
6607 should not be able to initialize the variable more than
6610 /* Create the guard variable. */
6611 guard = get_guard (decl);
6613 /* This optimization isn't safe on targets with relaxed memory
6614 consistency. On such targets we force synchronization in
6615 __cxa_guard_acquire. */
6616 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6618 /* Begin the conditional initialization. */
6619 if_stmt = begin_if_stmt ();
6620 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
6621 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6624 if (flag_threadsafe_statics)
6626 guard_addr = build_address (guard);
6628 acquire_fn = get_identifier ("__cxa_guard_acquire");
6629 release_fn = get_identifier ("__cxa_guard_release");
6630 abort_fn = get_identifier ("__cxa_guard_abort");
6631 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
6633 tree vfntype = build_function_type_list (void_type_node,
6634 TREE_TYPE (guard_addr),
6636 acquire_fn = push_library_fn
6637 (acquire_fn, build_function_type_list (integer_type_node,
6638 TREE_TYPE (guard_addr),
6641 release_fn = push_library_fn (release_fn, vfntype, NULL_TREE);
6642 abort_fn = push_library_fn (abort_fn, vfntype, NULL_TREE);
6646 release_fn = identifier_global_value (release_fn);
6647 abort_fn = identifier_global_value (abort_fn);
6650 inner_if_stmt = begin_if_stmt ();
6651 finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
6654 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6655 begin = get_target_expr (boolean_false_node);
6656 flag = TARGET_EXPR_SLOT (begin);
6658 TARGET_EXPR_CLEANUP (begin)
6659 = build3 (COND_EXPR, void_type_node, flag,
6661 build_call_n (abort_fn, 1, guard_addr));
6662 CLEANUP_EH_ONLY (begin) = 1;
6664 /* Do the initialization itself. */
6665 init = add_stmt_to_compound (begin, init);
6666 init = add_stmt_to_compound
6667 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
6668 init = add_stmt_to_compound
6669 (init, build_call_n (release_fn, 1, guard_addr));
6672 init = add_stmt_to_compound (init, set_guard (guard));
6674 /* Use atexit to register a function for destroying this static
6676 init = add_stmt_to_compound (init, register_dtor_fn (decl));
6678 finish_expr_stmt (init);
6680 if (flag_threadsafe_statics)
6682 finish_compound_stmt (inner_then_clause);
6683 finish_then_clause (inner_if_stmt);
6684 finish_if_stmt (inner_if_stmt);
6687 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6689 finish_compound_stmt (then_clause);
6690 finish_then_clause (if_stmt);
6691 finish_if_stmt (if_stmt);
6695 static_aggregates = tree_cons (init, decl, static_aggregates);
6699 /* Make TYPE a complete type based on INITIAL_VALUE.
6700 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6701 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6702 3 if the initializer list is empty (in pedantic mode). */
6705 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
6708 tree type, elt_type;
6712 unsigned HOST_WIDE_INT i;
6715 /* An array of character type can be initialized from a
6716 brace-enclosed string constant.
6718 FIXME: this code is duplicated from reshape_init. Probably
6719 we should just call reshape_init here? */
6720 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
6721 && TREE_CODE (initial_value) == CONSTRUCTOR
6722 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
6724 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
6725 tree value = VEC_index (constructor_elt, v, 0)->value;
6727 if (TREE_CODE (value) == STRING_CST
6728 && VEC_length (constructor_elt, v) == 1)
6729 initial_value = value;
6732 /* If any of the elements are parameter packs, we can't actually
6733 complete this type now because the array size is dependent. */
6734 if (TREE_CODE (initial_value) == CONSTRUCTOR)
6736 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value),
6739 if (PACK_EXPANSION_P (value))
6745 failure = complete_array_type (ptype, initial_value, do_default);
6747 /* We can create the array before the element type is complete, which
6748 means that we didn't have these two bits set in the original type
6749 either. In completing the type, we are expected to propagate these
6750 bits. See also complete_type which does the same thing for arrays
6753 if (TYPE_DOMAIN (type))
6755 elt_type = TREE_TYPE (type);
6756 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
6757 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
6758 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
6764 /* As above, but either give an error or reject zero-size arrays, depending
6768 cp_complete_array_type_or_error (tree *ptype, tree initial_value,
6769 bool do_default, tsubst_flags_t complain)
6772 bool sfinae = !(complain & tf_error);
6773 /* In SFINAE context we can't be lenient about zero-size arrays. */
6776 failure = cp_complete_array_type (ptype, initial_value, do_default);
6782 /* Not an error. */;
6783 else if (failure == 1)
6784 error ("initializer fails to determine size of %qT", *ptype);
6785 else if (failure == 2)
6788 error ("array size missing in %qT", *ptype);
6790 else if (failure == 3)
6791 error ("zero-size array %qT", *ptype);
6792 *ptype = error_mark_node;
6797 /* Return zero if something is declared to be a member of type
6798 CTYPE when in the context of CUR_TYPE. STRING is the error
6799 message to print in that case. Otherwise, quietly return 1. */
6802 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
6804 if (ctype && ctype != cur_type)
6806 if (flags == DTOR_FLAG)
6807 error ("destructor for alien class %qT cannot be a member", ctype);
6809 error ("constructor for alien class %qT cannot be a member", ctype);
6815 /* Subroutine of `grokdeclarator'. */
6817 /* Generate errors possibly applicable for a given set of specifiers.
6818 This is for ARM $7.1.2. */
6821 bad_specifiers (tree object,
6822 enum bad_spec_place type,
6833 error ("%qD declared as a %<virtual%> variable", object);
6835 error ("%qD declared as an %<inline%> variable", object);
6837 error ("%<const%> and %<volatile%> function specifiers on "
6838 "%qD invalid in variable declaration", object);
6842 error ("%qD declared as a %<virtual%> parameter", object);
6844 error ("%qD declared as an %<inline%> parameter", object);
6846 error ("%<const%> and %<volatile%> function specifiers on "
6847 "%qD invalid in parameter declaration", object);
6851 error ("%qD declared as a %<virtual%> type", object);
6853 error ("%qD declared as an %<inline%> type", object);
6855 error ("%<const%> and %<volatile%> function specifiers on "
6856 "%qD invalid in type declaration", object);
6860 error ("%qD declared as a %<virtual%> field", object);
6862 error ("%qD declared as an %<inline%> field", object);
6864 error ("%<const%> and %<volatile%> function specifiers on "
6865 "%qD invalid in field declaration", object);
6871 error ("%q+D declared as a friend", object);
6873 && (TREE_CODE (object) == TYPE_DECL
6874 || (!TYPE_PTRFN_P (TREE_TYPE (object))
6875 && !TYPE_REFFN_P (TREE_TYPE (object))
6876 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
6877 error ("%q+D declared with an exception specification", object);
6880 /* DECL is a member function or static data member and is presently
6881 being defined. Check that the definition is taking place in a
6885 check_class_member_definition_namespace (tree decl)
6887 /* These checks only apply to member functions and static data
6889 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
6890 || TREE_CODE (decl) == VAR_DECL);
6891 /* We check for problems with specializations in pt.c in
6892 check_specialization_namespace, where we can issue better
6894 if (processing_specialization)
6896 /* There are no restrictions on the placement of
6897 explicit instantiations. */
6898 if (processing_explicit_instantiation)
6902 A member function definition that appears outside of the
6903 class definition shall appear in a namespace scope enclosing
6904 the class definition.
6908 The definition for a static data member shall appear in a
6909 namespace scope enclosing the member's class definition. */
6910 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
6911 permerror (input_location, "definition of %qD is not in namespace enclosing %qT",
6912 decl, DECL_CONTEXT (decl));
6915 /* Build a PARM_DECL for the "this" parameter. TYPE is the
6916 METHOD_TYPE for a non-static member function; QUALS are the
6917 cv-qualifiers that apply to the function. */
6920 build_this_parm (tree type, cp_cv_quals quals)
6925 cp_cv_quals this_quals;
6927 this_type = TREE_VALUE (TYPE_ARG_TYPES (type));
6928 /* The `this' parameter is implicitly `const'; it cannot be
6930 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
6931 qual_type = cp_build_qualified_type (this_type, this_quals);
6932 parm = build_artificial_parm (this_identifier, qual_type);
6933 cp_apply_type_quals_to_decl (this_quals, parm);
6937 /* CTYPE is class type, or null if non-class.
6938 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
6940 DECLARATOR is the function's name.
6941 PARMS is a chain of PARM_DECLs for the function.
6942 VIRTUALP is truthvalue of whether the function is virtual or not.
6943 FLAGS are to be passed through to `grokclassfn'.
6944 QUALS are qualifiers indicating whether the function is `const'
6946 RAISES is a list of exceptions that this function can raise.
6947 CHECK is 1 if we must find this method in CTYPE, 0 if we should
6948 not look, and -1 if we should not call `grokclassfn' at all.
6950 SFK is the kind of special function (if any) for the new function.
6952 Returns `NULL_TREE' if something goes wrong, after issuing
6953 applicable error messages. */
6956 grokfndecl (tree ctype,
6960 tree orig_declarator,
6962 enum overload_flags flags,
6969 special_function_kind sfk,
6974 location_t location)
6977 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
6981 type = build_exception_variant (type, raises);
6983 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
6985 /* If we have an explicit location, use it, otherwise use whatever
6986 build_lang_decl used (probably input_location). */
6987 if (location != UNKNOWN_LOCATION)
6988 DECL_SOURCE_LOCATION (decl) = location;
6990 if (TREE_CODE (type) == METHOD_TYPE)
6993 parm = build_this_parm (type, quals);
6994 DECL_CHAIN (parm) = parms;
6997 DECL_ARGUMENTS (decl) = parms;
6998 for (t = parms; t; t = DECL_CHAIN (t))
6999 DECL_CONTEXT (t) = decl;
7000 /* Propagate volatile out from type to decl. */
7001 if (TYPE_VOLATILE (type))
7002 TREE_THIS_VOLATILE (decl) = 1;
7004 /* Setup decl according to sfk. */
7007 case sfk_constructor:
7008 case sfk_copy_constructor:
7009 case sfk_move_constructor:
7010 DECL_CONSTRUCTOR_P (decl) = 1;
7012 case sfk_destructor:
7013 DECL_DESTRUCTOR_P (decl) = 1;
7019 /* If pointers to member functions use the least significant bit to
7020 indicate whether a function is virtual, ensure a pointer
7021 to this function will have that bit clear. */
7022 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
7023 && TREE_CODE (type) == METHOD_TYPE
7024 && DECL_ALIGN (decl) < 2 * BITS_PER_UNIT)
7025 DECL_ALIGN (decl) = 2 * BITS_PER_UNIT;
7028 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
7032 ("defining explicit specialization %qD in friend declaration",
7036 tree fns = TREE_OPERAND (orig_declarator, 0);
7037 tree args = TREE_OPERAND (orig_declarator, 1);
7039 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7041 /* Something like `template <class T> friend void f<T>()'. */
7042 error ("invalid use of template-id %qD in declaration "
7043 "of primary template",
7049 /* A friend declaration of the form friend void f<>(). Record
7050 the information in the TEMPLATE_ID_EXPR. */
7051 SET_DECL_IMPLICIT_INSTANTIATION (decl);
7053 if (TREE_CODE (fns) == COMPONENT_REF)
7055 /* Due to bison parser ickiness, we will have already looked
7056 up an operator_name or PFUNCNAME within the current class
7057 (see template_id in parse.y). If the current class contains
7058 such a name, we'll get a COMPONENT_REF here. Undo that. */
7060 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
7061 == current_class_type);
7062 fns = TREE_OPERAND (fns, 1);
7064 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
7065 || TREE_CODE (fns) == OVERLOAD);
7066 DECL_TEMPLATE_INFO (decl) = build_template_info (fns, args);
7068 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
7069 if (TREE_PURPOSE (t)
7070 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
7072 error ("default arguments are not allowed in declaration "
7073 "of friend template specialization %qD",
7080 error ("%<inline%> is not allowed in declaration of friend "
7081 "template specialization %qD",
7088 /* If this decl has namespace scope, set that up. */
7090 set_decl_namespace (decl, in_namespace, friendp);
7092 DECL_CONTEXT (decl) = FROB_CONTEXT (current_decl_namespace ());
7094 /* `main' and builtins have implicit 'C' linkage. */
7095 if ((MAIN_NAME_P (declarator)
7096 || (IDENTIFIER_LENGTH (declarator) > 10
7097 && IDENTIFIER_POINTER (declarator)[0] == '_'
7098 && IDENTIFIER_POINTER (declarator)[1] == '_'
7099 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
7100 && current_lang_name == lang_name_cplusplus
7101 && ctype == NULL_TREE
7102 && DECL_FILE_SCOPE_P (decl))
7103 SET_DECL_LANGUAGE (decl, lang_c);
7105 /* Should probably propagate const out from type to decl I bet (mrs). */
7108 DECL_STATIC_FUNCTION_P (decl) = 1;
7109 DECL_CONTEXT (decl) = ctype;
7114 DECL_CONTEXT (decl) = ctype;
7116 check_class_member_definition_namespace (decl);
7119 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
7121 if (processing_template_decl)
7122 error ("cannot declare %<::main%> to be a template");
7124 error ("cannot declare %<::main%> to be inline");
7126 error ("cannot declare %<::main%> to be static");
7131 /* Members of anonymous types and local classes have no linkage; make
7132 them internal. If a typedef is made later, this will be changed. */
7133 if (ctype && (TYPE_ANONYMOUS_P (ctype)
7134 || decl_function_context (TYPE_MAIN_DECL (ctype))))
7137 if (publicp && cxx_dialect == cxx98)
7139 /* [basic.link]: A name with no linkage (notably, the name of a class
7140 or enumeration declared in a local scope) shall not be used to
7141 declare an entity with linkage.
7143 DR 757 relaxes this restriction for C++0x. */
7144 t = no_linkage_check (TREE_TYPE (decl),
7145 /*relaxed_p=*/false);
7148 if (TYPE_ANONYMOUS_P (t))
7150 if (DECL_EXTERN_C_P (decl))
7151 /* Allow this; it's pretty common in C. */;
7154 permerror (input_location, "anonymous type with no linkage "
7155 "used to declare function %q#D with linkage",
7157 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
7158 permerror (input_location, "%q+#D does not refer to the unqualified "
7159 "type, so it is not used for linkage",
7164 permerror (input_location, "type %qT with no linkage used to "
7165 "declare function %q#D with linkage", t, decl);
7169 TREE_PUBLIC (decl) = publicp;
7172 DECL_INTERFACE_KNOWN (decl) = 1;
7173 DECL_NOT_REALLY_EXTERN (decl) = 1;
7176 /* If the declaration was declared inline, mark it as such. */
7178 DECL_DECLARED_INLINE_P (decl) = 1;
7180 DECL_DECLARED_CONSTEXPR_P (decl) = true;
7182 DECL_EXTERNAL (decl) = 1;
7183 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
7186 ? G_("static member function %qD cannot have cv-qualifier")
7187 : G_("non-member function %qD cannot have cv-qualifier"),
7189 quals = TYPE_UNQUALIFIED;
7192 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
7193 && !grok_op_properties (decl, /*complain=*/true))
7197 /* Make the init_value nonzero so pushdecl knows this is not
7198 tentative. error_mark_node is replaced later with the BLOCK. */
7199 DECL_INITIAL (decl) = error_mark_node;
7201 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
7202 TREE_NOTHROW (decl) = 1;
7204 /* Caller will do the rest of this. */
7208 if (ctype != NULL_TREE)
7209 grokclassfn (ctype, decl, flags);
7211 decl = check_explicit_specialization (orig_declarator, decl,
7214 4 * (friendp != 0));
7215 if (decl == error_mark_node)
7220 cplus_decl_attributes (&decl, *attrlist, 0);
7221 *attrlist = NULL_TREE;
7224 /* Check main's type after attributes have been applied. */
7225 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
7227 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
7230 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
7232 error ("%<::main%> must return %<int%>");
7233 newtype = build_function_type (integer_type_node, oldtypeargs);
7234 TREE_TYPE (decl) = newtype;
7237 check_main_parameter_types (decl);
7240 if (ctype != NULL_TREE
7241 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
7244 tree old_decl = check_classfn (ctype, decl,
7245 (processing_template_decl
7246 > template_class_depth (ctype))
7247 ? current_template_parms
7250 if (old_decl == error_mark_node)
7258 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
7259 /* Because grokfndecl is always supposed to return a
7260 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7261 here. We depend on our callers to figure out that its
7262 really a template that's being returned. */
7263 old_decl = DECL_TEMPLATE_RESULT (old_decl);
7265 if (DECL_STATIC_FUNCTION_P (old_decl)
7266 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
7267 /* Remove the `this' parm added by grokclassfn.
7268 XXX Isn't this done in start_function, too? */
7269 revert_static_member_fn (decl);
7270 if (DECL_ARTIFICIAL (old_decl))
7272 error ("definition of implicitly-declared %qD", old_decl);
7276 /* Since we've smashed OLD_DECL to its
7277 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7278 if (TREE_CODE (decl) == TEMPLATE_DECL)
7279 decl = DECL_TEMPLATE_RESULT (decl);
7281 /* Attempt to merge the declarations. This can fail, in
7282 the case of some invalid specialization declarations. */
7283 pushed_scope = push_scope (ctype);
7284 ok = duplicate_decls (decl, old_decl, friendp);
7286 pop_scope (pushed_scope);
7289 error ("no %q#D member function declared in class %qT",
7297 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
7300 if (ctype == NULL_TREE || check)
7304 DECL_VIRTUAL_P (decl) = 1;
7309 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7310 the linkage that DECL will receive in the object file. */
7313 set_linkage_for_static_data_member (tree decl)
7315 /* A static data member always has static storage duration and
7316 external linkage. Note that static data members are forbidden in
7317 local classes -- the only situation in which a class has
7318 non-external linkage. */
7319 TREE_PUBLIC (decl) = 1;
7320 TREE_STATIC (decl) = 1;
7321 /* For non-template classes, static data members are always put
7322 out in exactly those files where they are defined, just as
7323 with ordinary namespace-scope variables. */
7324 if (!processing_template_decl)
7325 DECL_INTERFACE_KNOWN (decl) = 1;
7328 /* Create a VAR_DECL named NAME with the indicated TYPE.
7330 If SCOPE is non-NULL, it is the class type or namespace containing
7331 the variable. If SCOPE is NULL, the variable should is created in
7332 the innermost enclosings scope. */
7335 grokvardecl (tree type,
7337 const cp_decl_specifier_seq *declspecs,
7343 tree explicit_scope;
7345 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
7347 /* Compute the scope in which to place the variable, but remember
7348 whether or not that scope was explicitly specified by the user. */
7349 explicit_scope = scope;
7352 /* An explicit "extern" specifier indicates a namespace-scope
7354 if (declspecs->storage_class == sc_extern)
7355 scope = current_decl_namespace ();
7356 else if (!at_function_scope_p ())
7357 scope = current_scope ();
7361 && (/* If the variable is a namespace-scope variable declared in a
7362 template, we need DECL_LANG_SPECIFIC. */
7363 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
7364 /* Similarly for namespace-scope variables with language linkage
7366 || (TREE_CODE (scope) == NAMESPACE_DECL
7367 && current_lang_name != lang_name_cplusplus)
7368 /* Similarly for static data members. */
7370 decl = build_lang_decl (VAR_DECL, name, type);
7372 decl = build_decl (input_location, VAR_DECL, name, type);
7374 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
7375 set_decl_namespace (decl, explicit_scope, 0);
7377 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
7379 if (declspecs->storage_class == sc_extern)
7381 DECL_THIS_EXTERN (decl) = 1;
7382 DECL_EXTERNAL (decl) = !initialized;
7385 if (DECL_CLASS_SCOPE_P (decl))
7387 set_linkage_for_static_data_member (decl);
7388 /* This function is only called with out-of-class definitions. */
7389 DECL_EXTERNAL (decl) = 0;
7390 check_class_member_definition_namespace (decl);
7392 /* At top level, either `static' or no s.c. makes a definition
7393 (perhaps tentative), and absence of `static' makes it public. */
7394 else if (toplevel_bindings_p ())
7396 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
7397 && (DECL_THIS_EXTERN (decl) || ! constp));
7398 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
7400 /* Not at top level, only `static' makes a static definition. */
7403 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
7404 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
7407 if (declspecs->specs[(int)ds_thread])
7408 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
7410 /* If the type of the decl has no linkage, make sure that we'll
7411 notice that in mark_used. */
7412 if (cxx_dialect > cxx98
7413 && decl_linkage (decl) != lk_none
7414 && DECL_LANG_SPECIFIC (decl) == NULL
7415 && !DECL_EXTERN_C_P (decl)
7416 && no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false))
7417 retrofit_lang_decl (decl);
7419 if (TREE_PUBLIC (decl))
7421 /* [basic.link]: A name with no linkage (notably, the name of a class
7422 or enumeration declared in a local scope) shall not be used to
7423 declare an entity with linkage.
7425 DR 757 relaxes this restriction for C++0x. */
7426 tree t = (cxx_dialect > cxx98 ? NULL_TREE
7427 : no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false));
7430 if (TYPE_ANONYMOUS_P (t))
7432 if (DECL_EXTERN_C_P (decl))
7433 /* Allow this; it's pretty common in C. */
7437 /* DRs 132, 319 and 389 seem to indicate types with
7438 no linkage can only be used to declare extern "C"
7439 entities. Since it's not always an error in the
7440 ISO C++ 90 Standard, we only issue a warning. */
7441 warning (0, "anonymous type with no linkage used to declare "
7442 "variable %q#D with linkage", decl);
7443 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
7444 warning (0, "%q+#D does not refer to the unqualified "
7445 "type, so it is not used for linkage",
7450 warning (0, "type %qT with no linkage used to declare variable "
7451 "%q#D with linkage", t, decl);
7455 DECL_INTERFACE_KNOWN (decl) = 1;
7460 /* Create and return a canonical pointer to member function type, for
7461 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7464 build_ptrmemfunc_type (tree type)
7468 tree unqualified_variant = NULL_TREE;
7470 if (type == error_mark_node)
7473 /* If a canonical type already exists for this type, use it. We use
7474 this method instead of type_hash_canon, because it only does a
7475 simple equality check on the list of field members. */
7477 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
7480 /* Make sure that we always have the unqualified pointer-to-member
7482 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7484 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
7486 t = make_class_type (RECORD_TYPE);
7487 xref_basetypes (t, NULL_TREE);
7489 /* Let the front end know this is a pointer to member function... */
7490 TYPE_PTRMEMFUNC_FLAG (t) = 1;
7491 /* ... and not really a class type. */
7492 SET_CLASS_TYPE_P (t, 0);
7494 field = build_decl (input_location, FIELD_DECL, pfn_identifier, type);
7497 field = build_decl (input_location, FIELD_DECL, delta_identifier,
7499 DECL_CHAIN (field) = fields;
7502 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
7504 /* Zap out the name so that the back end will give us the debugging
7505 information for this anonymous RECORD_TYPE. */
7506 TYPE_NAME (t) = NULL_TREE;
7508 /* If this is not the unqualified form of this pointer-to-member
7509 type, set the TYPE_MAIN_VARIANT for this type to be the
7510 unqualified type. Since they are actually RECORD_TYPEs that are
7511 not variants of each other, we must do this manually.
7512 As we just built a new type there is no need to do yet another copy. */
7513 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7515 int type_quals = cp_type_quals (type);
7516 TYPE_READONLY (t) = (type_quals & TYPE_QUAL_CONST) != 0;
7517 TYPE_VOLATILE (t) = (type_quals & TYPE_QUAL_VOLATILE) != 0;
7518 TYPE_RESTRICT (t) = (type_quals & TYPE_QUAL_RESTRICT) != 0;
7519 TYPE_MAIN_VARIANT (t) = unqualified_variant;
7520 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
7521 TYPE_NEXT_VARIANT (unqualified_variant) = t;
7522 TREE_TYPE (TYPE_BINFO (t)) = t;
7525 /* Cache this pointer-to-member type so that we can find it again
7527 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
7529 if (TYPE_STRUCTURAL_EQUALITY_P (type))
7530 SET_TYPE_STRUCTURAL_EQUALITY (t);
7531 else if (TYPE_CANONICAL (type) != type)
7532 TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
7537 /* Create and return a pointer to data member type. */
7540 build_ptrmem_type (tree class_type, tree member_type)
7542 if (TREE_CODE (member_type) == METHOD_TYPE)
7544 cp_cv_quals quals = type_memfn_quals (member_type);
7545 member_type = build_memfn_type (member_type, class_type, quals);
7546 return build_ptrmemfunc_type (build_pointer_type (member_type));
7550 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
7551 return build_offset_type (class_type, member_type);
7555 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7556 Check to see that the definition is valid. Issue appropriate error
7557 messages. Return 1 if the definition is particularly bad, or 0
7561 check_static_variable_definition (tree decl, tree type)
7563 /* If DECL is declared constexpr, we'll do the appropriate checks
7564 in check_initializer. */
7565 if (DECL_P (decl) && DECL_DECLARED_CONSTEXPR_P (decl))
7567 else if (cxx_dialect >= cxx0x && !INTEGRAL_OR_ENUMERATION_TYPE_P (type))
7569 if (literal_type_p (type))
7570 error ("%<constexpr%> needed for in-class initialization of static "
7571 "data member %q#D of non-integral type", decl);
7573 error ("in-class initialization of static data member %q#D of "
7574 "non-literal type", decl);
7578 /* Motion 10 at San Diego: If a static const integral data member is
7579 initialized with an integral constant expression, the initializer
7580 may appear either in the declaration (within the class), or in
7581 the definition, but not both. If it appears in the class, the
7582 member is a member constant. The file-scope definition is always
7584 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
7586 error ("invalid in-class initialization of static data member "
7587 "of non-integral type %qT",
7591 else if (!CP_TYPE_CONST_P (type))
7592 error ("ISO C++ forbids in-class initialization of non-const "
7593 "static member %qD",
7595 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type))
7596 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids initialization of member constant "
7597 "%qD of non-integral type %qT", decl, type);
7602 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
7603 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
7604 expressions out into temporary variables so that walk_tree doesn't
7605 step into them (c++/15764). */
7608 stabilize_save_expr_r (tree *expr_p, int *walk_subtrees, void *data)
7610 struct pointer_set_t *pset = (struct pointer_set_t *)data;
7611 tree expr = *expr_p;
7612 if (TREE_CODE (expr) == SAVE_EXPR)
7614 tree op = TREE_OPERAND (expr, 0);
7615 cp_walk_tree (&op, stabilize_save_expr_r, data, pset);
7616 if (TREE_SIDE_EFFECTS (op))
7617 TREE_OPERAND (expr, 0) = get_temp_regvar (TREE_TYPE (op), op);
7619 else if (!EXPR_P (expr))
7624 /* Entry point for the above. */
7627 stabilize_vla_size (tree size)
7629 struct pointer_set_t *pset = pointer_set_create ();
7630 /* Break out any function calls into temporary variables. */
7631 cp_walk_tree (&size, stabilize_save_expr_r, pset, pset);
7634 /* Given the SIZE (i.e., number of elements) in an array, compute an
7635 appropriate index type for the array. If non-NULL, NAME is the
7636 name of the thing being declared. */
7639 compute_array_index_type (tree name, tree size, tsubst_flags_t complain)
7644 tree abi_1_itype = NULL_TREE;
7646 if (error_operand_p (size))
7647 return error_mark_node;
7649 type = TREE_TYPE (size);
7650 /* type_dependent_expression_p? */
7651 if (!dependent_type_p (type))
7653 mark_rvalue_use (size);
7655 if (cxx_dialect < cxx0x && TREE_CODE (size) == NOP_EXPR
7656 && TREE_SIDE_EFFECTS (size))
7657 /* In C++98, we mark a non-constant array bound with a magic
7658 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
7661 size = fold_non_dependent_expr (size);
7663 if (CLASS_TYPE_P (type)
7664 && CLASSTYPE_LITERAL_P (type))
7666 size = build_expr_type_conversion (WANT_INT, size, true);
7669 if (!(complain & tf_error))
7670 return error_mark_node;
7672 error ("size of array %qD has non-integral type %qT",
7675 error ("size of array has non-integral type %qT", type);
7676 size = integer_one_node;
7678 if (size == error_mark_node)
7679 return error_mark_node;
7680 type = TREE_TYPE (size);
7681 /* We didn't support this case in GCC 3.2, so don't bother
7682 trying to model it now in ABI v1. */
7683 abi_1_itype = error_mark_node;
7686 size = maybe_constant_value (size);
7687 if (!TREE_CONSTANT (size))
7691 if (error_operand_p (size))
7692 return error_mark_node;
7694 /* The array bound must be an integer type. */
7695 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type))
7697 if (!(complain & tf_error))
7698 return error_mark_node;
7700 error ("size of array %qD has non-integral type %qT", name, type);
7702 error ("size of array has non-integral type %qT", type);
7703 size = integer_one_node;
7704 type = TREE_TYPE (size);
7708 /* A type is dependent if it is...an array type constructed from any
7709 dependent type or whose size is specified by a constant expression
7710 that is value-dependent. */
7711 /* We can only call value_dependent_expression_p on integral constant
7712 expressions; treat non-constant expressions as dependent, too. */
7713 if (processing_template_decl
7714 && (dependent_type_p (type)
7715 || !TREE_CONSTANT (size) || value_dependent_expression_p (size)))
7717 /* We cannot do any checking for a SIZE that isn't known to be
7718 constant. Just build the index type and mark that it requires
7719 structural equality checks. */
7720 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7721 size, integer_one_node));
7722 TYPE_DEPENDENT_P (itype) = 1;
7723 TYPE_DEPENDENT_P_VALID (itype) = 1;
7724 SET_TYPE_STRUCTURAL_EQUALITY (itype);
7728 if (!abi_version_at_least (2) && processing_template_decl
7729 && abi_1_itype == NULL_TREE)
7730 /* For abi-1, we handled all instances in templates the same way,
7731 even when they were non-dependent. This affects the manglings
7732 produced. So, we do the normal checking for non-dependent
7733 sizes, but at the end we'll return the same type that abi-1
7734 would have, but with TYPE_CANONICAL set to the "right"
7735 value that the current ABI would provide. */
7736 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7737 osize, integer_one_node));
7739 /* Normally, the array-bound will be a constant. */
7740 if (TREE_CODE (size) == INTEGER_CST)
7742 /* Check to see if the array bound overflowed. Make that an
7743 error, no matter how generous we're being. */
7744 constant_expression_error (size);
7746 /* An array must have a positive number of elements. */
7747 if (INT_CST_LT (size, integer_zero_node))
7749 if (!(complain & tf_error))
7750 return error_mark_node;
7752 error ("size of array %qD is negative", name);
7754 error ("size of array is negative");
7755 size = integer_one_node;
7757 /* As an extension we allow zero-sized arrays. */
7758 else if (integer_zerop (size))
7760 if (!(complain & tf_error))
7761 /* We must fail if performing argument deduction (as
7762 indicated by the state of complain), so that
7763 another substitution can be found. */
7764 return error_mark_node;
7765 else if (in_system_header)
7766 /* Allow them in system headers because glibc uses them. */;
7768 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array %qD", name);
7770 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array");
7773 else if (TREE_CONSTANT (size)
7774 /* We don't allow VLAs at non-function scopes, or during
7775 tentative template substitution. */
7776 || !at_function_scope_p () || !(complain & tf_error))
7778 if (!(complain & tf_error))
7779 return error_mark_node;
7780 /* `(int) &fn' is not a valid array bound. */
7782 error ("size of array %qD is not an integral constant-expression",
7785 error ("size of array is not an integral constant-expression");
7786 size = integer_one_node;
7788 else if (pedantic && warn_vla != 0)
7791 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array %qD", name);
7793 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array");
7795 else if (warn_vla > 0)
7799 "variable length array %qD is used", name);
7802 "variable length array is used");
7805 if (processing_template_decl && !TREE_CONSTANT (size))
7806 /* A variable sized array. */
7807 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
7810 HOST_WIDE_INT saved_processing_template_decl;
7812 /* Compute the index of the largest element in the array. It is
7813 one less than the number of elements in the array. We save
7814 and restore PROCESSING_TEMPLATE_DECL so that computations in
7815 cp_build_binary_op will be appropriately folded. */
7816 saved_processing_template_decl = processing_template_decl;
7817 processing_template_decl = 0;
7818 itype = cp_build_binary_op (input_location,
7820 cp_convert (ssizetype, size),
7821 cp_convert (ssizetype, integer_one_node),
7822 tf_warning_or_error);
7823 itype = fold (itype);
7824 processing_template_decl = saved_processing_template_decl;
7826 if (!TREE_CONSTANT (itype))
7827 /* A variable sized array. */
7828 itype = variable_size (itype);
7829 /* Make sure that there was no overflow when creating to a signed
7830 index type. (For example, on a 32-bit machine, an array with
7831 size 2^32 - 1 is too big.) */
7832 else if (TREE_CODE (itype) == INTEGER_CST
7833 && TREE_OVERFLOW (itype))
7835 if (!(complain & tf_error))
7836 return error_mark_node;
7837 error ("overflow in array dimension");
7838 TREE_OVERFLOW (itype) = 0;
7842 /* Create and return the appropriate index type. */
7843 if (abi_1_itype && abi_1_itype != error_mark_node)
7845 tree t = build_index_type (itype);
7846 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
7847 itype = abi_1_itype;
7850 itype = build_index_type (itype);
7852 /* If the index type were dependent, we would have returned early, so
7853 remember that it isn't. */
7854 TYPE_DEPENDENT_P (itype) = 0;
7855 TYPE_DEPENDENT_P_VALID (itype) = 1;
7859 /* Returns the scope (if any) in which the entity declared by
7860 DECLARATOR will be located. If the entity was declared with an
7861 unqualified name, NULL_TREE is returned. */
7864 get_scope_of_declarator (const cp_declarator *declarator)
7866 while (declarator && declarator->kind != cdk_id)
7867 declarator = declarator->declarator;
7869 /* If the declarator-id is a SCOPE_REF, the scope in which the
7870 declaration occurs is the first operand. */
7872 && declarator->u.id.qualifying_scope)
7873 return declarator->u.id.qualifying_scope;
7875 /* Otherwise, the declarator is not a qualified name; the entity will
7876 be declared in the current scope. */
7880 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
7881 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
7885 create_array_type_for_decl (tree name, tree type, tree size)
7887 tree itype = NULL_TREE;
7889 /* If things have already gone awry, bail now. */
7890 if (type == error_mark_node || size == error_mark_node)
7891 return error_mark_node;
7893 /* If there are some types which cannot be array elements,
7894 issue an error-message and return. */
7895 switch (TREE_CODE (type))
7899 error ("declaration of %qD as array of void", name);
7901 error ("creating array of void");
7902 return error_mark_node;
7906 error ("declaration of %qD as array of functions", name);
7908 error ("creating array of functions");
7909 return error_mark_node;
7911 case REFERENCE_TYPE:
7913 error ("declaration of %qD as array of references", name);
7915 error ("creating array of references");
7916 return error_mark_node;
7920 error ("declaration of %qD as array of function members", name);
7922 error ("creating array of function members");
7923 return error_mark_node;
7931 The constant expressions that specify the bounds of the arrays
7932 can be omitted only for the first member of the sequence. */
7933 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
7936 error ("declaration of %qD as multidimensional array must "
7937 "have bounds for all dimensions except the first",
7940 error ("multidimensional array must have bounds for all "
7941 "dimensions except the first");
7943 return error_mark_node;
7946 /* Figure out the index type for the array. */
7948 itype = compute_array_index_type (name, size, tf_warning_or_error);
7951 T is called the array element type; this type shall not be [...] an
7952 abstract class type. */
7953 abstract_virtuals_error (name, type);
7955 return build_cplus_array_type (type, itype);
7958 /* Check that it's OK to declare a function with the indicated TYPE.
7959 SFK indicates the kind of special function (if any) that this
7960 function is. OPTYPE is the type given in a conversion operator
7961 declaration, or the class type for a constructor/destructor.
7962 Returns the actual return type of the function; that
7963 may be different than TYPE if an error occurs, or for certain
7964 special functions. */
7967 check_special_function_return_type (special_function_kind sfk,
7973 case sfk_constructor:
7975 error ("return type specification for constructor invalid");
7977 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7978 type = build_pointer_type (optype);
7980 type = void_type_node;
7983 case sfk_destructor:
7985 error ("return type specification for destructor invalid");
7986 /* We can't use the proper return type here because we run into
7987 problems with ambiguous bases and covariant returns.
7988 Java classes are left unchanged because (void *) isn't a valid
7989 Java type, and we don't want to change the Java ABI. */
7990 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
7991 type = build_pointer_type (void_type_node);
7993 type = void_type_node;
7996 case sfk_conversion:
7998 error ("return type specified for %<operator %T%>", optype);
8009 /* A variable or data member (whose unqualified name is IDENTIFIER)
8010 has been declared with the indicated TYPE. If the TYPE is not
8011 acceptable, issue an error message and return a type to use for
8012 error-recovery purposes. */
8015 check_var_type (tree identifier, tree type)
8017 if (VOID_TYPE_P (type))
8020 error ("unnamed variable or field declared void");
8021 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
8023 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
8024 error ("variable or field %qE declared void", identifier);
8027 error ("variable or field declared void");
8028 type = error_mark_node;
8034 /* Given declspecs and a declarator (abstract or otherwise), determine
8035 the name and type of the object declared and construct a DECL node
8038 DECLSPECS points to the representation of declaration-specifier
8039 sequence that precedes declarator.
8041 DECL_CONTEXT says which syntactic context this declaration is in:
8042 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8043 FUNCDEF for a function definition. Like NORMAL but a few different
8044 error messages in each case. Return value may be zero meaning
8045 this definition is too screwy to try to parse.
8046 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8047 handle member functions (which have FIELD context).
8048 Return value may be zero meaning this definition is too screwy to
8050 PARM for a parameter declaration (either within a function prototype
8051 or before a function body). Make a PARM_DECL, or return void_type_node.
8052 TPARM for a template parameter declaration.
8053 CATCHPARM for a parameter declaration before a catch clause.
8054 TYPENAME if for a typename (in a cast or sizeof).
8055 Don't make a DECL node; just return the ..._TYPE node.
8056 FIELD for a struct or union field; make a FIELD_DECL.
8057 BITFIELD for a field with specified width.
8059 INITIALIZED is as for start_decl.
8061 ATTRLIST is a pointer to the list of attributes, which may be NULL
8062 if there are none; *ATTRLIST may be modified if attributes from inside
8063 the declarator should be applied to the declaration.
8065 When this function is called, scoping variables (such as
8066 CURRENT_CLASS_TYPE) should reflect the scope in which the
8067 declaration occurs, not the scope in which the new declaration will
8068 be placed. For example, on:
8072 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8075 Returns a DECL (if a declarator is present), a TYPE (if there is no
8076 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8080 grokdeclarator (const cp_declarator *declarator,
8081 const cp_decl_specifier_seq *declspecs,
8082 enum decl_context decl_context,
8086 tree type = NULL_TREE;
8088 int explicit_int128 = 0;
8089 int virtualp, explicitp, friendp, inlinep, staticp;
8090 int explicit_int = 0;
8091 int explicit_char = 0;
8092 int defaulted_int = 0;
8093 tree dependent_name = NULL_TREE;
8095 tree typedef_decl = NULL_TREE;
8096 const char *name = NULL;
8097 tree typedef_type = NULL_TREE;
8098 /* True if this declarator is a function definition. */
8099 bool funcdef_flag = false;
8100 cp_declarator_kind innermost_code = cdk_error;
8103 /* See the code below that used this. */
8104 tree decl_attr = NULL_TREE;
8107 /* Keep track of what sort of function is being processed
8108 so that we can warn about default return values, or explicit
8109 return values which do not match prescribed defaults. */
8110 special_function_kind sfk = sfk_none;
8112 tree dname = NULL_TREE;
8113 tree ctor_return_type = NULL_TREE;
8114 enum overload_flags flags = NO_SPECIAL;
8115 /* cv-qualifiers that apply to the declarator, for a declaration of
8116 a member function. */
8117 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
8118 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8120 tree raises = NULL_TREE;
8121 int template_count = 0;
8122 tree returned_attrs = NULL_TREE;
8123 tree parms = NULL_TREE;
8124 const cp_declarator *id_declarator;
8125 /* The unqualified name of the declarator; either an
8126 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8127 tree unqualified_id;
8128 /* The class type, if any, in which this entity is located,
8129 or NULL_TREE if none. Note that this value may be different from
8130 the current class type; for example if an attempt is made to declare
8131 "A::f" inside "B", this value will be "A". */
8132 tree ctype = current_class_type;
8133 /* The NAMESPACE_DECL for the namespace in which this entity is
8134 located. If an unqualified name is used to declare the entity,
8135 this value will be NULL_TREE, even if the entity is located at
8137 tree in_namespace = NULL_TREE;
8138 cp_storage_class storage_class;
8139 bool unsigned_p, signed_p, short_p, long_p, thread_p;
8140 bool type_was_error_mark_node = false;
8141 bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
8142 bool template_type_arg = false;
8143 bool template_parm_flag = false;
8144 bool constexpr_p = declspecs->specs[(int) ds_constexpr];
8147 signed_p = declspecs->specs[(int)ds_signed];
8148 unsigned_p = declspecs->specs[(int)ds_unsigned];
8149 short_p = declspecs->specs[(int)ds_short];
8150 long_p = declspecs->specs[(int)ds_long];
8151 longlong = declspecs->specs[(int)ds_long] >= 2;
8152 explicit_int128 = declspecs->explicit_int128_p;
8153 thread_p = declspecs->specs[(int)ds_thread];
8155 if (decl_context == FUNCDEF)
8156 funcdef_flag = true, decl_context = NORMAL;
8157 else if (decl_context == MEMFUNCDEF)
8158 funcdef_flag = true, decl_context = FIELD;
8159 else if (decl_context == BITFIELD)
8160 bitfield = 1, decl_context = FIELD;
8161 else if (decl_context == TEMPLATE_TYPE_ARG)
8162 template_type_arg = true, decl_context = TYPENAME;
8163 else if (decl_context == TPARM)
8164 template_parm_flag = true, decl_context = PARM;
8166 if (initialized > 1)
8167 funcdef_flag = true;
8169 /* Look inside a declarator for the name being declared
8170 and get it as a string, for an error message. */
8171 for (id_declarator = declarator;
8173 id_declarator = id_declarator->declarator)
8175 if (id_declarator->kind != cdk_id)
8176 innermost_code = id_declarator->kind;
8178 switch (id_declarator->kind)
8181 if (id_declarator->declarator
8182 && id_declarator->declarator->kind == cdk_id)
8184 sfk = id_declarator->declarator->u.id.sfk;
8185 if (sfk == sfk_destructor)
8192 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
8193 tree decl = id_declarator->u.id.unqualified_name;
8196 if (qualifying_scope)
8198 if (at_function_scope_p ())
8202 A declarator-id shall not be qualified except
8205 None of the cases are permitted in block
8207 if (qualifying_scope == global_namespace)
8208 error ("invalid use of qualified-name %<::%D%>",
8210 else if (TYPE_P (qualifying_scope))
8211 error ("invalid use of qualified-name %<%T::%D%>",
8212 qualifying_scope, decl);
8214 error ("invalid use of qualified-name %<%D::%D%>",
8215 qualifying_scope, decl);
8216 return error_mark_node;
8218 else if (TYPE_P (qualifying_scope))
8220 ctype = qualifying_scope;
8221 if (innermost_code != cdk_function
8222 && current_class_type
8223 && !UNIQUELY_DERIVED_FROM_P (ctype,
8224 current_class_type))
8226 error ("type %qT is not derived from type %qT",
8227 ctype, current_class_type);
8228 return error_mark_node;
8231 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
8232 in_namespace = qualifying_scope;
8234 switch (TREE_CODE (decl))
8240 if (innermost_code != cdk_function)
8242 error ("declaration of %qD as non-function", decl);
8243 return error_mark_node;
8245 else if (!qualifying_scope
8246 && !(current_class_type && at_class_scope_p ()))
8248 error ("declaration of %qD as non-member", decl);
8249 return error_mark_node;
8252 type = TREE_OPERAND (decl, 0);
8254 type = constructor_name (type);
8255 name = identifier_to_locale (IDENTIFIER_POINTER (type));
8260 case TEMPLATE_ID_EXPR:
8262 tree fns = TREE_OPERAND (decl, 0);
8265 if (TREE_CODE (dname) != IDENTIFIER_NODE)
8267 gcc_assert (is_overloaded_fn (dname));
8268 dname = DECL_NAME (get_first_fn (dname));
8273 case IDENTIFIER_NODE:
8274 if (TREE_CODE (decl) == IDENTIFIER_NODE)
8277 if (C_IS_RESERVED_WORD (dname))
8279 error ("declarator-id missing; using reserved word %qD",
8281 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
8283 else if (!IDENTIFIER_TYPENAME_P (dname))
8284 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
8287 gcc_assert (flags == NO_SPECIAL);
8288 flags = TYPENAME_FLAG;
8289 ctor_return_type = TREE_TYPE (dname);
8290 sfk = sfk_conversion;
8291 if (is_typename_at_global_scope (dname))
8292 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
8294 name = "<invalid operator>";
8311 return error_mark_node;
8316 if (id_declarator->kind == cdk_id)
8322 The declarator in a function-definition shall have the form
8323 D1 ( parameter-declaration-clause) ... */
8324 if (funcdef_flag && innermost_code != cdk_function)
8326 error ("function definition does not declare parameters");
8327 return error_mark_node;
8330 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
8331 && innermost_code != cdk_function
8332 && ! (ctype && !declspecs->any_specifiers_p))
8334 error ("declaration of %qD as non-function", dname);
8335 return error_mark_node;
8338 /* Anything declared one level down from the top level
8339 must be one of the parameters of a function
8340 (because the body is at least two levels down). */
8342 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
8343 by not allowing C++ class definitions to specify their parameters
8344 with xdecls (must be spec.d in the parmlist).
8346 Since we now wait to push a class scope until we are sure that
8347 we are in a legitimate method context, we must set oldcname
8348 explicitly (since current_class_name is not yet alive).
8350 We also want to avoid calling this a PARM if it is in a namespace. */
8352 if (decl_context == NORMAL && !toplevel_bindings_p ())
8354 struct cp_binding_level *b = current_binding_level;
8355 current_binding_level = b->level_chain;
8356 if (current_binding_level != 0 && toplevel_bindings_p ())
8357 decl_context = PARM;
8358 current_binding_level = b;
8362 name = decl_context == PARM ? "parameter" : "type name";
8364 if (constexpr_p && declspecs->specs[(int)ds_typedef])
8366 error ("%<constexpr%> cannot appear in a typedef declaration");
8367 return error_mark_node;
8370 /* If there were multiple types specified in the decl-specifier-seq,
8371 issue an error message. */
8372 if (declspecs->multiple_types_p)
8374 error ("two or more data types in declaration of %qs", name);
8375 return error_mark_node;
8378 if (declspecs->conflicting_specifiers_p)
8380 error ("conflicting specifiers in declaration of %qs", name);
8381 return error_mark_node;
8384 /* Extract the basic type from the decl-specifier-seq. */
8385 type = declspecs->type;
8386 if (type == error_mark_node)
8389 type_was_error_mark_node = true;
8391 /* If the entire declaration is itself tagged as deprecated then
8392 suppress reports of deprecated items. */
8393 if (type && TREE_DEPRECATED (type)
8394 && deprecated_state != DEPRECATED_SUPPRESS)
8395 warn_deprecated_use (type, NULL_TREE);
8396 if (type && TREE_CODE (type) == TYPE_DECL)
8398 typedef_decl = type;
8399 type = TREE_TYPE (typedef_decl);
8400 if (TREE_DEPRECATED (type)
8401 && DECL_ARTIFICIAL (typedef_decl)
8402 && deprecated_state != DEPRECATED_SUPPRESS)
8403 warn_deprecated_use (type, NULL_TREE);
8405 /* No type at all: default to `int', and set DEFAULTED_INT
8406 because it was not a user-defined typedef. */
8407 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
8409 /* These imply 'int'. */
8410 type = integer_type_node;
8414 explicit_int = declspecs->explicit_int_p;
8415 explicit_char = declspecs->explicit_char_p;
8418 /* See the code below that used this. */
8420 decl_attr = DECL_ATTRIBUTES (typedef_decl);
8422 typedef_type = type;
8425 if (sfk != sfk_conversion)
8426 ctor_return_type = ctype;
8428 if (sfk != sfk_none)
8429 type = check_special_function_return_type (sfk, type,
8431 else if (type == NULL_TREE)
8437 /* We handle `main' specially here, because 'main () { }' is so
8438 common. With no options, it is allowed. With -Wreturn-type,
8439 it is a warning. It is only an error with -pedantic-errors. */
8440 is_main = (funcdef_flag
8441 && dname && TREE_CODE (dname) == IDENTIFIER_NODE
8442 && MAIN_NAME_P (dname)
8443 && ctype == NULL_TREE
8444 && in_namespace == NULL_TREE
8445 && current_namespace == global_namespace);
8447 if (type_was_error_mark_node)
8448 /* We've already issued an error, don't complain more. */;
8449 else if (in_system_header || flag_ms_extensions)
8450 /* Allow it, sigh. */;
8452 permerror (input_location, "ISO C++ forbids declaration of %qs with no type", name);
8454 pedwarn (input_location, OPT_pedantic,
8455 "ISO C++ forbids declaration of %qs with no type", name);
8457 warning (OPT_Wreturn_type,
8458 "ISO C++ forbids declaration of %qs with no type", name);
8460 type = integer_type_node;
8465 /* Now process the modifiers that were specified
8466 and check for invalid combinations. */
8468 /* Long double is a special combination. */
8469 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
8472 type = cp_build_qualified_type (long_double_type_node,
8473 cp_type_quals (type));
8476 /* Check all other uses of type modifiers. */
8478 if (unsigned_p || signed_p || long_p || short_p)
8482 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
8483 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
8484 else if (signed_p && unsigned_p)
8485 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
8486 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
8487 error ("%<long long%> invalid for %qs", name);
8488 else if (explicit_int128 && TREE_CODE (type) != INTEGER_TYPE)
8489 error ("%<__int128%> invalid for %qs", name);
8490 else if (long_p && TREE_CODE (type) == REAL_TYPE)
8491 error ("%<long%> invalid for %qs", name);
8492 else if (short_p && TREE_CODE (type) == REAL_TYPE)
8493 error ("%<short%> invalid for %qs", name);
8494 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
8495 error ("%<long%> or %<short%> invalid for %qs", name);
8496 else if ((long_p || short_p || explicit_char || explicit_int) && explicit_int128)
8497 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name);
8498 else if ((long_p || short_p) && explicit_char)
8499 error ("%<long%> or %<short%> specified with char for %qs", name);
8500 else if (long_p && short_p)
8501 error ("%<long%> and %<short%> specified together for %qs", name);
8502 else if (type == char16_type_node || type == char32_type_node)
8504 if (signed_p || unsigned_p)
8505 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
8506 else if (short_p || long_p)
8507 error ("%<short%> or %<long%> invalid for %qs", name);
8512 if (!explicit_int && !defaulted_int && !explicit_char && !explicit_int128 && pedantic)
8514 pedwarn (input_location, OPT_pedantic,
8515 "long, short, signed or unsigned used invalidly for %qs",
8517 if (flag_pedantic_errors)
8520 if (explicit_int128)
8522 if (int128_integer_type_node == NULL_TREE)
8524 error ("%<__int128%> is not supported by this target");
8529 pedwarn (input_location, OPT_pedantic,
8530 "ISO C++ does not support %<__int128%> for %qs",
8532 if (flag_pedantic_errors)
8538 /* Discard the type modifiers if they are invalid. */
8546 explicit_int128 = false;
8550 /* Decide whether an integer type is signed or not.
8551 Optionally treat bitfields as signed by default. */
8555 It is implementation-defined whether a plain (neither
8556 explicitly signed or unsigned) char, short, int, or long
8557 bit-field is signed or unsigned.
8559 Naturally, we extend this to long long as well. Note that
8560 this does not include wchar_t. */
8561 || (bitfield && !flag_signed_bitfields
8563 /* A typedef for plain `int' without `signed' can be
8564 controlled just like plain `int', but a typedef for
8565 `signed int' cannot be so controlled. */
8567 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
8568 && TREE_CODE (type) == INTEGER_TYPE
8569 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
8571 if (explicit_int128)
8572 type = int128_unsigned_type_node;
8574 type = long_long_unsigned_type_node;
8576 type = long_unsigned_type_node;
8578 type = short_unsigned_type_node;
8579 else if (type == char_type_node)
8580 type = unsigned_char_type_node;
8581 else if (typedef_decl)
8582 type = unsigned_type_for (type);
8584 type = unsigned_type_node;
8586 else if (signed_p && type == char_type_node)
8587 type = signed_char_type_node;
8588 else if (explicit_int128)
8589 type = int128_integer_type_node;
8591 type = long_long_integer_type_node;
8593 type = long_integer_type_node;
8595 type = short_integer_type_node;
8597 if (declspecs->specs[(int)ds_complex])
8599 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
8600 error ("complex invalid for %qs", name);
8601 /* If we just have "complex", it is equivalent to
8602 "complex double", but if any modifiers at all are specified it is
8603 the complex form of TYPE. E.g, "complex short" is
8604 "complex short int". */
8605 else if (defaulted_int && ! longlong && ! explicit_int128
8606 && ! (long_p || short_p || signed_p || unsigned_p))
8607 type = complex_double_type_node;
8608 else if (type == integer_type_node)
8609 type = complex_integer_type_node;
8610 else if (type == float_type_node)
8611 type = complex_float_type_node;
8612 else if (type == double_type_node)
8613 type = complex_double_type_node;
8614 else if (type == long_double_type_node)
8615 type = complex_long_double_type_node;
8617 type = build_complex_type (type);
8620 type_quals = TYPE_UNQUALIFIED;
8621 if (declspecs->specs[(int)ds_const])
8622 type_quals |= TYPE_QUAL_CONST;
8623 if (declspecs->specs[(int)ds_volatile])
8624 type_quals |= TYPE_QUAL_VOLATILE;
8625 if (declspecs->specs[(int)ds_restrict])
8626 type_quals |= TYPE_QUAL_RESTRICT;
8627 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
8628 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8631 type_quals |= cp_type_quals (type);
8632 type = cp_build_qualified_type_real
8633 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
8634 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
8635 /* We might have ignored or rejected some of the qualifiers. */
8636 type_quals = cp_type_quals (type);
8639 inlinep = !! declspecs->specs[(int)ds_inline];
8640 virtualp = !! declspecs->specs[(int)ds_virtual];
8641 explicitp = !! declspecs->specs[(int)ds_explicit];
8643 storage_class = declspecs->storage_class;
8644 if (storage_class == sc_static)
8645 staticp = 1 + (decl_context == FIELD);
8647 if (virtualp && staticp == 2)
8649 error ("member %qD cannot be declared both virtual and static", dname);
8650 storage_class = sc_none;
8653 friendp = !! declspecs->specs[(int)ds_friend];
8655 if (dependent_name && !friendp)
8657 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
8658 return error_mark_node;
8661 /* Issue errors about use of storage classes for parameters. */
8662 if (decl_context == PARM)
8664 if (declspecs->specs[(int)ds_typedef])
8666 error ("typedef declaration invalid in parameter declaration");
8667 return error_mark_node;
8669 else if (template_parm_flag && storage_class != sc_none)
8671 error ("storage class specified for template parameter %qs", name);
8672 return error_mark_node;
8674 else if (storage_class == sc_static
8675 || storage_class == sc_extern
8677 error ("storage class specifiers invalid in parameter declarations");
8679 if (type_uses_auto (type))
8681 error ("parameter declared %<auto%>");
8682 type = error_mark_node;
8685 /* Function parameters cannot be constexpr. If we saw one, moan
8686 and pretend it wasn't there. */
8689 error ("a parameter cannot be declared %<constexpr%>");
8694 /* Give error if `virtual' is used outside of class declaration. */
8696 && (current_class_name == NULL_TREE || decl_context != FIELD))
8698 error ("%<virtual%> outside class declaration");
8702 /* Static anonymous unions are dealt with here. */
8703 if (staticp && decl_context == TYPENAME
8705 && ANON_AGGR_TYPE_P (declspecs->type))
8706 decl_context = FIELD;
8708 /* Warn about storage classes that are invalid for certain
8709 kinds of declarations (parameters, typenames, etc.). */
8712 && storage_class != sc_extern
8713 && storage_class != sc_static)
8714 || declspecs->specs[(int)ds_typedef]))
8716 error ("multiple storage classes in declaration of %qs", name);
8719 if (decl_context != NORMAL
8720 && ((storage_class != sc_none
8721 && storage_class != sc_mutable)
8724 if ((decl_context == PARM || decl_context == CATCHPARM)
8725 && (storage_class == sc_register
8726 || storage_class == sc_auto))
8728 else if (declspecs->specs[(int)ds_typedef])
8730 else if (decl_context == FIELD
8731 /* C++ allows static class elements. */
8732 && storage_class == sc_static)
8733 /* C++ also allows inlines and signed and unsigned elements,
8734 but in those cases we don't come in here. */
8738 if (decl_context == FIELD)
8739 error ("storage class specified for %qs", name);
8742 if (decl_context == PARM || decl_context == CATCHPARM)
8743 error ("storage class specified for parameter %qs", name);
8745 error ("storage class specified for typename");
8747 if (storage_class == sc_register
8748 || storage_class == sc_auto
8749 || storage_class == sc_extern
8751 storage_class = sc_none;
8754 else if (storage_class == sc_extern && funcdef_flag
8755 && ! toplevel_bindings_p ())
8756 error ("nested function %qs declared %<extern%>", name);
8757 else if (toplevel_bindings_p ())
8759 if (storage_class == sc_auto)
8760 error ("top-level declaration of %qs specifies %<auto%>", name);
8763 && storage_class != sc_extern
8764 && storage_class != sc_static)
8766 error ("function-scope %qs implicitly auto and declared %<__thread%>",
8771 if (storage_class && friendp)
8773 error ("storage class specifiers invalid in friend function declarations");
8774 storage_class = sc_none;
8779 unqualified_id = NULL_TREE;
8782 unqualified_id = id_declarator->u.id.unqualified_name;
8783 switch (TREE_CODE (unqualified_id))
8786 unqualified_id = TREE_OPERAND (unqualified_id, 0);
8787 if (TYPE_P (unqualified_id))
8788 unqualified_id = constructor_name (unqualified_id);
8791 case IDENTIFIER_NODE:
8792 case TEMPLATE_ID_EXPR:
8800 /* Determine the type of the entity declared by recurring on the
8802 for (; declarator; declarator = declarator->declarator)
8804 const cp_declarator *inner_declarator;
8807 if (type == error_mark_node)
8808 return error_mark_node;
8810 attrs = declarator->attributes;
8816 if (declarator == NULL || declarator->kind == cdk_id)
8817 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
8818 if (declarator->kind == cdk_function)
8819 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
8820 if (declarator->kind == cdk_array)
8821 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
8822 returned_attrs = decl_attributes (&type,
8823 chainon (returned_attrs, attrs),
8827 if (declarator->kind == cdk_id)
8830 inner_declarator = declarator->declarator;
8832 switch (declarator->kind)
8835 type = create_array_type_for_decl (dname, type,
8836 declarator->u.array.bounds);
8844 /* Declaring a function type.
8845 Make sure we have a valid type for the function to return. */
8847 if (type_quals != TYPE_UNQUALIFIED)
8849 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
8850 warning (OPT_Wignored_qualifiers,
8851 "type qualifiers ignored on function return type");
8852 /* We now know that the TYPE_QUALS don't apply to the
8853 decl, but to its return type. */
8854 type_quals = TYPE_UNQUALIFIED;
8856 errmsg = targetm.invalid_return_type (type);
8860 type = integer_type_node;
8863 /* Error about some types functions can't return. */
8865 if (TREE_CODE (type) == FUNCTION_TYPE)
8867 error ("%qs declared as function returning a function", name);
8868 return error_mark_node;
8870 if (TREE_CODE (type) == ARRAY_TYPE)
8872 error ("%qs declared as function returning an array", name);
8873 return error_mark_node;
8876 /* Pick up type qualifiers which should be applied to `this'. */
8877 memfn_quals = declarator->u.function.qualifiers;
8879 /* Pick up the exception specifications. */
8880 raises = declarator->u.function.exception_specification;
8882 /* Say it's a definition only for the CALL_EXPR
8883 closest to the identifier. */
8884 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
8886 /* Handle a late-specified return type. */
8889 if (type_uses_auto (type))
8891 if (!declarator->u.function.late_return_type)
8893 error ("%qs function uses %<auto%> type specifier without"
8894 " late return type", name);
8895 return error_mark_node;
8897 else if (!is_auto (type))
8899 error ("%qs function with late return type has"
8900 " %qT as its type rather than plain %<auto%>",
8902 return error_mark_node;
8905 else if (declarator->u.function.late_return_type)
8907 error ("%qs function with late return type not declared"
8908 " with %<auto%> type specifier", name);
8909 return error_mark_node;
8912 type = splice_late_return_type
8913 (type, declarator->u.function.late_return_type);
8914 if (type == error_mark_node)
8915 return error_mark_node;
8917 if (ctype == NULL_TREE
8918 && decl_context == FIELD
8920 && (friendp == 0 || dname == current_class_name))
8921 ctype = current_class_type;
8923 if (ctype && (sfk == sfk_constructor
8924 || sfk == sfk_destructor))
8926 /* We are within a class's scope. If our declarator name
8927 is the same as the class name, and we are defining
8928 a function, then it is a constructor/destructor, and
8929 therefore returns a void type. */
8931 /* ISO C++ 12.4/2. A destructor may not be declared
8932 const or volatile. A destructor may not be
8935 ISO C++ 12.1. A constructor may not be declared
8936 const or volatile. A constructor may not be
8937 virtual. A constructor may not be static. */
8939 error ((flags == DTOR_FLAG)
8940 ? "destructor cannot be static member function"
8941 : "constructor cannot be static member function");
8944 error ((flags == DTOR_FLAG)
8945 ? "destructors may not be cv-qualified"
8946 : "constructors may not be cv-qualified");
8947 memfn_quals = TYPE_UNQUALIFIED;
8950 if (decl_context == FIELD
8951 && !member_function_or_else (ctype,
8954 return error_mark_node;
8956 if (flags != DTOR_FLAG)
8958 /* It's a constructor. */
8963 permerror (input_location, "constructors cannot be declared virtual");
8966 if (decl_context == FIELD
8967 && sfk != sfk_constructor)
8968 return error_mark_node;
8970 if (decl_context == FIELD)
8976 error ("can%'t initialize friend function %qs", name);
8979 /* Cannot be both friend and virtual. */
8980 error ("virtual functions cannot be friends");
8983 if (decl_context == NORMAL)
8984 error ("friend declaration not in class definition");
8985 if (current_function_decl && funcdef_flag)
8986 error ("can%'t define friend function %qs in a local "
8990 else if (ctype && sfk == sfk_conversion)
8994 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION);
8999 arg_types = grokparms (declarator->u.function.parameters,
9002 if (inner_declarator
9003 && inner_declarator->kind == cdk_id
9004 && inner_declarator->u.id.sfk == sfk_destructor
9005 && arg_types != void_list_node)
9007 error ("destructors may not have parameters");
9008 arg_types = void_list_node;
9012 type = build_function_type (type, arg_types);
9019 /* Filter out pointers-to-references and references-to-references.
9020 We can get these if a TYPE_DECL is used. */
9022 if (TREE_CODE (type) == REFERENCE_TYPE)
9024 if (declarator->kind != cdk_reference)
9026 error ("cannot declare pointer to %q#T", type);
9027 type = TREE_TYPE (type);
9030 /* In C++0x, we allow reference to reference declarations
9031 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9032 and template type arguments [14.3.1/4 temp.arg.type]. The
9033 check for direct reference to reference declarations, which
9034 are still forbidden, occurs below. Reasoning behind the change
9035 can be found in DR106, DR540, and the rvalue reference
9037 else if (cxx_dialect == cxx98)
9039 error ("cannot declare reference to %q#T", type);
9040 type = TREE_TYPE (type);
9043 else if (VOID_TYPE_P (type))
9045 if (declarator->kind == cdk_reference)
9046 error ("cannot declare reference to %q#T", type);
9047 else if (declarator->kind == cdk_ptrmem)
9048 error ("cannot declare pointer to %q#T member", type);
9051 /* We now know that the TYPE_QUALS don't apply to the decl,
9052 but to the target of the pointer. */
9053 type_quals = TYPE_UNQUALIFIED;
9055 if (declarator->kind == cdk_ptrmem
9056 && (TREE_CODE (type) == FUNCTION_TYPE
9057 || (memfn_quals && TREE_CODE (type) == METHOD_TYPE)))
9059 memfn_quals |= type_memfn_quals (type);
9060 type = build_memfn_type (type,
9061 declarator->u.pointer.class_type,
9063 if (type == error_mark_node)
9064 return error_mark_node;
9065 memfn_quals = TYPE_UNQUALIFIED;
9068 if (TREE_CODE (type) == FUNCTION_TYPE
9069 && type_memfn_quals (type) != TYPE_UNQUALIFIED)
9070 error (declarator->kind == cdk_reference
9071 ? G_("cannot declare reference to qualified function type %qT")
9072 : G_("cannot declare pointer to qualified function type %qT"),
9075 /* When the pointed-to type involves components of variable size,
9076 care must be taken to ensure that the size evaluation code is
9077 emitted early enough to dominate all the possible later uses
9078 and late enough for the variables on which it depends to have
9081 This is expected to happen automatically when the pointed-to
9082 type has a name/declaration of it's own, but special attention
9083 is required if the type is anonymous.
9085 We handle the NORMAL and FIELD contexts here by inserting a
9086 dummy statement that just evaluates the size at a safe point
9087 and ensures it is not deferred until e.g. within a deeper
9088 conditional context (c++/43555).
9090 We expect nothing to be needed here for PARM or TYPENAME.
9091 Evaluating the size at this point for TYPENAME would
9092 actually be incorrect, as we might be in the middle of an
9093 expression with side effects on the pointed-to type size
9094 "arguments" prior to the pointer declaration point and the
9095 size evaluation could end up prior to the side effects. */
9097 if (!TYPE_NAME (type)
9098 && (decl_context == NORMAL || decl_context == FIELD)
9099 && at_function_scope_p ()
9100 && variably_modified_type_p (type, NULL_TREE))
9102 /* First break out any side-effects. */
9103 stabilize_vla_size (TYPE_SIZE (type));
9104 /* And then force evaluation of the SAVE_EXPR. */
9105 finish_expr_stmt (TYPE_SIZE (type));
9108 if (declarator->kind == cdk_reference)
9110 /* In C++0x, the type we are creating a reference to might be
9111 a typedef which is itself a reference type. In that case,
9112 we follow the reference collapsing rules in
9113 [7.1.3/8 dcl.typedef] to create the final reference type:
9115 "If a typedef TD names a type that is a reference to a type
9116 T, an attempt to create the type 'lvalue reference to cv TD'
9117 creates the type 'lvalue reference to T,' while an attempt
9118 to create the type "rvalue reference to cv TD' creates the
9121 if (!VOID_TYPE_P (type))
9122 type = cp_build_reference_type
9123 ((TREE_CODE (type) == REFERENCE_TYPE
9124 ? TREE_TYPE (type) : type),
9125 (declarator->u.reference.rvalue_ref
9126 && (TREE_CODE(type) != REFERENCE_TYPE
9127 || TYPE_REF_IS_RVALUE (type))));
9129 /* In C++0x, we need this check for direct reference to
9130 reference declarations, which are forbidden by
9131 [8.3.2/5 dcl.ref]. Reference to reference declarations
9132 are only allowed indirectly through typedefs and template
9133 type arguments. Example:
9135 void foo(int & &); // invalid ref-to-ref decl
9137 typedef int & int_ref;
9138 void foo(int_ref &); // valid ref-to-ref decl
9140 if (inner_declarator && inner_declarator->kind == cdk_reference)
9141 error ("cannot declare reference to %q#T, which is not "
9142 "a typedef or a template type argument", type);
9144 else if (TREE_CODE (type) == METHOD_TYPE)
9145 type = build_ptrmemfunc_type (build_pointer_type (type));
9146 else if (declarator->kind == cdk_ptrmem)
9148 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
9150 if (declarator->u.pointer.class_type == error_mark_node)
9151 /* We will already have complained. */
9152 type = error_mark_node;
9154 type = build_ptrmem_type (declarator->u.pointer.class_type,
9158 type = build_pointer_type (type);
9160 /* Process a list of type modifier keywords (such as
9161 const or volatile) that were given inside the `*' or `&'. */
9163 if (declarator->u.pointer.qualifiers)
9166 = cp_build_qualified_type (type,
9167 declarator->u.pointer.qualifiers);
9168 type_quals = cp_type_quals (type);
9181 /* We need to stabilize side-effects in VLA sizes for regular array
9182 declarations too, not just pointers to arrays. */
9183 if (type != error_mark_node && !TYPE_NAME (type)
9184 && (decl_context == NORMAL || decl_context == FIELD)
9185 && at_function_scope_p ()
9186 && variably_modified_type_p (type, NULL_TREE))
9187 stabilize_vla_size (TYPE_SIZE (type));
9189 /* A `constexpr' specifier used in an object declaration declares
9190 the object as `const'. */
9191 if (constexpr_p && innermost_code != cdk_function)
9193 if (type_quals & TYPE_QUAL_CONST)
9194 error ("both %<const%> and %<constexpr%> cannot be used here");
9195 if (type_quals & TYPE_QUAL_VOLATILE)
9196 error ("both %<volatile%> and %<constexpr%> cannot be used here");
9197 type_quals |= TYPE_QUAL_CONST;
9198 type = cp_build_qualified_type (type, type_quals);
9201 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
9202 && TREE_CODE (type) != FUNCTION_TYPE
9203 && TREE_CODE (type) != METHOD_TYPE)
9205 error ("template-id %qD used as a declarator",
9207 unqualified_id = dname;
9210 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
9211 qualified with a class-name, turn it into a METHOD_TYPE, unless
9212 we know that the function is static. We take advantage of this
9213 opportunity to do other processing that pertains to entities
9214 explicitly declared to be class members. Note that if DECLARATOR
9215 is non-NULL, we know it is a cdk_id declarator; otherwise, we
9216 would not have exited the loop above. */
9218 && declarator->u.id.qualifying_scope
9219 && TYPE_P (declarator->u.id.qualifying_scope))
9223 ctype = declarator->u.id.qualifying_scope;
9224 ctype = TYPE_MAIN_VARIANT (ctype);
9226 while (t != NULL_TREE && CLASS_TYPE_P (t))
9228 /* You're supposed to have one `template <...>' for every
9229 template class, but you don't need one for a full
9230 specialization. For example:
9232 template <class T> struct S{};
9233 template <> struct S<int> { void f(); };
9234 void S<int>::f () {}
9236 is correct; there shouldn't be a `template <>' for the
9237 definition of `S<int>::f'. */
9238 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
9239 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
9240 /* T is an explicit (not partial) specialization. All
9241 containing classes must therefore also be explicitly
9244 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
9245 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
9246 template_count += 1;
9248 t = TYPE_MAIN_DECL (t);
9249 t = DECL_CONTEXT (t);
9252 if (ctype == current_class_type)
9256 permerror (input_location, "member functions are implicitly friends of their class");
9260 permerror (declarator->id_loc,
9261 "extra qualification %<%T::%> on member %qs",
9264 else if (/* If the qualifying type is already complete, then we
9265 can skip the following checks. */
9266 !COMPLETE_TYPE_P (ctype)
9267 && (/* If the function is being defined, then
9268 qualifying type must certainly be complete. */
9270 /* A friend declaration of "T::f" is OK, even if
9271 "T" is a template parameter. But, if this
9272 function is not a friend, the qualifying type
9274 || (!friendp && !CLASS_TYPE_P (ctype))
9275 /* For a declaration, the type need not be
9276 complete, if either it is dependent (since there
9277 is no meaningful definition of complete in that
9278 case) or the qualifying class is currently being
9280 || !(dependent_type_p (ctype)
9281 || currently_open_class (ctype)))
9282 /* Check that the qualifying type is complete. */
9283 && !complete_type_or_else (ctype, NULL_TREE))
9284 return error_mark_node;
9285 else if (TREE_CODE (type) == FUNCTION_TYPE)
9287 if (current_class_type
9288 && (!friendp || funcdef_flag))
9291 ? "cannot define member function %<%T::%s%> within %<%T%>"
9292 : "cannot declare member function %<%T::%s%> within %<%T%>",
9293 ctype, name, current_class_type);
9294 return error_mark_node;
9297 else if (declspecs->specs[(int)ds_typedef]
9298 && current_class_type)
9300 error ("cannot declare member %<%T::%s%> within %qT",
9301 ctype, name, current_class_type);
9302 return error_mark_node;
9306 if (ctype == NULL_TREE && decl_context == FIELD && friendp == 0)
9307 ctype = current_class_type;
9309 /* A constexpr non-static member function is implicitly const. */
9310 if (constexpr_p && ctype && staticp == 0
9311 && TREE_CODE (type) == FUNCTION_TYPE
9312 && sfk != sfk_constructor && sfk != sfk_destructor)
9313 memfn_quals |= TYPE_QUAL_CONST;
9315 /* Now TYPE has the actual type. */
9320 *attrlist = chainon (returned_attrs, *attrlist);
9322 attrlist = &returned_attrs;
9325 /* Handle parameter packs. */
9326 if (parameter_pack_p)
9328 if (decl_context == PARM)
9329 /* Turn the type into a pack expansion.*/
9330 type = make_pack_expansion (type);
9332 error ("non-parameter %qs cannot be a parameter pack", name);
9335 /* Did array size calculations overflow? */
9337 if (TREE_CODE (type) == ARRAY_TYPE
9338 && COMPLETE_TYPE_P (type)
9339 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
9340 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
9342 error ("size of array %qs is too large", name);
9343 /* If we proceed with the array type as it is, we'll eventually
9344 crash in tree_low_cst(). */
9345 type = error_mark_node;
9348 if ((decl_context == FIELD || decl_context == PARM)
9349 && !processing_template_decl
9350 && variably_modified_type_p (type, NULL_TREE))
9352 if (decl_context == FIELD)
9353 error ("data member may not have variably modified type %qT", type);
9355 error ("parameter may not have variably modified type %qT", type);
9356 type = error_mark_node;
9359 if (explicitp == 1 || (explicitp && friendp))
9361 /* [dcl.fct.spec] The explicit specifier shall only be used in
9362 declarations of constructors within a class definition. */
9363 error ("only declarations of constructors can be %<explicit%>");
9367 if (storage_class == sc_mutable)
9369 if (decl_context != FIELD || friendp)
9371 error ("non-member %qs cannot be declared %<mutable%>", name);
9372 storage_class = sc_none;
9374 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
9376 error ("non-object member %qs cannot be declared %<mutable%>", name);
9377 storage_class = sc_none;
9379 else if (TREE_CODE (type) == FUNCTION_TYPE
9380 || TREE_CODE (type) == METHOD_TYPE)
9382 error ("function %qs cannot be declared %<mutable%>", name);
9383 storage_class = sc_none;
9387 error ("static %qs cannot be declared %<mutable%>", name);
9388 storage_class = sc_none;
9390 else if (type_quals & TYPE_QUAL_CONST)
9392 error ("const %qs cannot be declared %<mutable%>", name);
9393 storage_class = sc_none;
9395 else if (TREE_CODE (type) == REFERENCE_TYPE)
9397 permerror (input_location, "reference %qs cannot be declared "
9398 "%<mutable%>", name);
9399 storage_class = sc_none;
9403 /* If this is declaring a typedef name, return a TYPE_DECL. */
9404 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
9408 /* Note that the grammar rejects storage classes
9409 in typenames, fields or parameters. */
9410 if (current_lang_name == lang_name_java)
9411 TYPE_FOR_JAVA (type) = 1;
9413 /* This declaration:
9415 typedef void f(int) const;
9417 declares a function type which is not a member of any
9418 particular class, but which is cv-qualified; for
9419 example "f S::*" declares a pointer to a const-qualified
9420 member function of S. We record the cv-qualification in the
9422 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
9424 type = apply_memfn_quals (type, memfn_quals);
9426 /* We have now dealt with these qualifiers. */
9427 memfn_quals = TYPE_UNQUALIFIED;
9430 if (decl_context == FIELD)
9431 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
9433 decl = build_decl (input_location, TYPE_DECL, unqualified_id, type);
9434 if (id_declarator && declarator->u.id.qualifying_scope) {
9435 error_at (DECL_SOURCE_LOCATION (decl),
9436 "typedef name may not be a nested-name-specifier");
9437 TREE_TYPE (decl) = error_mark_node;
9440 if (decl_context != FIELD)
9442 if (!current_function_decl)
9443 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
9444 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
9445 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
9446 (current_function_decl)))
9447 /* The TYPE_DECL is "abstract" because there will be
9448 clones of this constructor/destructor, and there will
9449 be copies of this TYPE_DECL generated in those
9451 DECL_ABSTRACT (decl) = 1;
9453 else if (constructor_name_p (unqualified_id, current_class_type))
9454 permerror (input_location, "ISO C++ forbids nested type %qD with same name "
9455 "as enclosing class",
9458 /* If the user declares "typedef struct {...} foo" then the
9459 struct will have an anonymous name. Fill that name in now.
9460 Nothing can refer to it, so nothing needs know about the name
9462 if (type != error_mark_node
9465 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
9466 && TYPE_ANONYMOUS_P (type)
9467 && cp_type_quals (type) == TYPE_UNQUALIFIED)
9471 /* Replace the anonymous name with the real name everywhere. */
9472 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
9474 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
9475 /* We do not rename the debug info representing the
9476 anonymous tagged type because the standard says in
9477 [dcl.typedef] that the naming applies only for
9478 linkage purposes. */
9479 /*debug_hooks->set_name (t, decl);*/
9480 TYPE_NAME (t) = decl;
9483 if (TYPE_LANG_SPECIFIC (type))
9484 TYPE_WAS_ANONYMOUS (type) = 1;
9486 /* If this is a typedef within a template class, the nested
9487 type is a (non-primary) template. The name for the
9488 template needs updating as well. */
9489 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
9490 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
9491 = TYPE_IDENTIFIER (type);
9493 /* Adjust linkage now that we aren't anonymous anymore. */
9494 set_linkage_according_to_type (type, TYPE_MAIN_DECL (type));
9495 determine_visibility (TYPE_MAIN_DECL (type));
9497 /* FIXME remangle member functions; member functions of a
9498 type with external linkage have external linkage. */
9502 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
9503 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
9505 bad_specifiers (decl, BSP_TYPE, virtualp,
9506 memfn_quals != TYPE_UNQUALIFIED,
9507 inlinep, friendp, raises != NULL_TREE);
9512 /* Detect the case of an array type of unspecified size
9513 which came, as such, direct from a typedef name.
9514 We must copy the type, so that the array's domain can be
9515 individually set by the object's initializer. */
9517 if (type && typedef_type
9518 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
9519 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
9520 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
9522 /* Detect where we're using a typedef of function type to declare a
9523 function. PARMS will not be set, so we must create it now. */
9525 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
9527 tree decls = NULL_TREE;
9530 for (args = TYPE_ARG_TYPES (type);
9531 args && args != void_list_node;
9532 args = TREE_CHAIN (args))
9534 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
9536 DECL_CHAIN (decl) = decls;
9540 parms = nreverse (decls);
9542 if (decl_context != TYPENAME)
9544 /* A cv-qualifier-seq shall only be part of the function type
9545 for a non-static member function. [8.3.5/4 dcl.fct] */
9546 if (type_memfn_quals (type) != TYPE_UNQUALIFIED
9547 && (current_class_type == NULL_TREE || staticp) )
9550 ? G_("qualified function types cannot be used to "
9551 "declare static member functions")
9552 : G_("qualified function types cannot be used to "
9553 "declare free functions"));
9554 type = TYPE_MAIN_VARIANT (type);
9557 /* The qualifiers on the function type become the qualifiers on
9558 the non-static member function. */
9559 memfn_quals |= type_memfn_quals (type);
9560 type_quals = TYPE_UNQUALIFIED;
9564 /* If this is a type name (such as, in a cast or sizeof),
9565 compute the type and return it now. */
9567 if (decl_context == TYPENAME)
9569 /* Note that the grammar rejects storage classes
9570 in typenames, fields or parameters. */
9571 if (type_quals != TYPE_UNQUALIFIED)
9572 type_quals = TYPE_UNQUALIFIED;
9574 /* Special case: "friend class foo" looks like a TYPENAME context. */
9577 if (type_quals != TYPE_UNQUALIFIED)
9579 error ("type qualifiers specified for friend class declaration");
9580 type_quals = TYPE_UNQUALIFIED;
9584 error ("%<inline%> specified for friend class declaration");
9590 /* Don't allow friend declaration without a class-key. */
9591 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9592 permerror (input_location, "template parameters cannot be friends");
9593 else if (TREE_CODE (type) == TYPENAME_TYPE)
9594 permerror (input_location, "friend declaration requires class-key, "
9595 "i.e. %<friend class %T::%D%>",
9596 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
9598 permerror (input_location, "friend declaration requires class-key, "
9599 "i.e. %<friend %#T%>",
9603 /* Only try to do this stuff if we didn't already give up. */
9604 if (type != integer_type_node)
9606 /* A friendly class? */
9607 if (current_class_type)
9608 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
9611 error ("trying to make class %qT a friend of global scope",
9614 type = void_type_node;
9617 else if (memfn_quals)
9619 if (ctype == NULL_TREE
9620 && TREE_CODE (type) == METHOD_TYPE)
9621 ctype = TYPE_METHOD_BASETYPE (type);
9624 type = build_memfn_type (type, ctype, memfn_quals);
9625 /* Core issue #547: need to allow this in template type args. */
9626 else if (template_type_arg && TREE_CODE (type) == FUNCTION_TYPE)
9627 type = apply_memfn_quals (type, memfn_quals);
9629 error ("invalid qualifiers on non-member function type");
9634 else if (unqualified_id == NULL_TREE && decl_context != PARM
9635 && decl_context != CATCHPARM
9636 && TREE_CODE (type) != UNION_TYPE
9639 error ("abstract declarator %qT used as declaration", type);
9640 return error_mark_node;
9643 /* Only functions may be declared using an operator-function-id. */
9645 && IDENTIFIER_OPNAME_P (unqualified_id)
9646 && TREE_CODE (type) != FUNCTION_TYPE
9647 && TREE_CODE (type) != METHOD_TYPE)
9649 error ("declaration of %qD as non-function", unqualified_id);
9650 return error_mark_node;
9653 /* We don't check parameter types here because we can emit a better
9654 error message later. */
9655 if (decl_context != PARM)
9657 type = check_var_type (unqualified_id, type);
9658 if (type == error_mark_node)
9659 return error_mark_node;
9662 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9663 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9665 if (decl_context == PARM || decl_context == CATCHPARM)
9667 if (ctype || in_namespace)
9668 error ("cannot use %<::%> in parameter declaration");
9670 /* A parameter declared as an array of T is really a pointer to T.
9671 One declared as a function is really a pointer to a function.
9672 One declared as a member is really a pointer to member. */
9674 if (TREE_CODE (type) == ARRAY_TYPE)
9676 /* Transfer const-ness of array into that of type pointed to. */
9677 type = build_pointer_type (TREE_TYPE (type));
9678 type_quals = TYPE_UNQUALIFIED;
9680 else if (TREE_CODE (type) == FUNCTION_TYPE)
9681 type = build_pointer_type (type);
9684 if (ctype && TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
9685 && !NEW_DELETE_OPNAME_P (unqualified_id))
9686 type = build_memfn_type (type, ctype, memfn_quals);
9691 if (decl_context == PARM)
9693 decl = cp_build_parm_decl (unqualified_id, type);
9695 bad_specifiers (decl, BSP_PARM, virtualp,
9696 memfn_quals != TYPE_UNQUALIFIED,
9697 inlinep, friendp, raises != NULL_TREE);
9699 else if (decl_context == FIELD)
9701 /* The C99 flexible array extension. */
9702 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
9703 && TYPE_DOMAIN (type) == NULL_TREE)
9705 tree itype = compute_array_index_type (dname, integer_zero_node,
9706 tf_warning_or_error);
9707 type = build_cplus_array_type (TREE_TYPE (type), itype);
9710 if (type == error_mark_node)
9712 /* Happens when declaring arrays of sizes which
9713 are error_mark_node, for example. */
9716 else if (in_namespace && !friendp)
9718 /* Something like struct S { int N::j; }; */
9719 error ("invalid use of %<::%>");
9720 return error_mark_node;
9722 else if (TREE_CODE (type) == FUNCTION_TYPE
9723 || TREE_CODE (type) == METHOD_TYPE)
9726 tree function_context;
9730 /* This should never happen in pure C++ (the check
9731 could be an assert). It could happen in
9732 Objective-C++ if someone writes invalid code that
9733 uses a function declaration for an instance
9734 variable or property (instance variables and
9735 properties are parsed as FIELD_DECLs, but they are
9736 part of an Objective-C class, not a C++ class).
9737 That code is invalid and is caught by this
9741 error ("declaration of function %qD in invalid context",
9743 return error_mark_node;
9746 /* ``A union may [ ... ] not [ have ] virtual functions.''
9748 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
9750 error ("function %qD declared virtual inside a union",
9752 return error_mark_node;
9755 if (NEW_DELETE_OPNAME_P (unqualified_id))
9759 error ("%qD cannot be declared virtual, since it "
9767 /* Check that the name used for a destructor makes sense. */
9768 if (sfk == sfk_destructor)
9770 tree uqname = id_declarator->u.id.unqualified_name;
9774 gcc_assert (friendp);
9775 error ("expected qualified name in friend declaration "
9776 "for destructor %qD", uqname);
9777 return error_mark_node;
9780 if (!check_dtor_name (ctype, TREE_OPERAND (uqname, 0)))
9782 error ("declaration of %qD as member of %qT",
9784 return error_mark_node;
9788 error ("a destructor cannot be %<constexpr%>");
9789 return error_mark_node;
9792 else if (sfk == sfk_constructor && friendp && !ctype)
9794 error ("expected qualified name in friend declaration "
9795 "for constructor %qD",
9796 id_declarator->u.id.unqualified_name);
9797 return error_mark_node;
9800 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
9801 function_context = (ctype != NULL_TREE) ?
9802 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
9803 publicp = (! friendp || ! staticp)
9804 && function_context == NULL_TREE;
9805 decl = grokfndecl (ctype, type,
9806 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9807 ? unqualified_id : dname,
9810 virtualp, flags, memfn_quals, raises,
9811 friendp ? -1 : 0, friendp, publicp,
9812 inlinep | (2 * constexpr_p),
9814 funcdef_flag, template_count, in_namespace,
9815 attrlist, declarator->id_loc);
9816 if (decl == NULL_TREE)
9817 return error_mark_node;
9819 /* This clobbers the attrs stored in `decl' from `attrlist'. */
9820 /* The decl and setting of decl_attr is also turned off. */
9821 decl = build_decl_attribute_variant (decl, decl_attr);
9824 /* [class.conv.ctor]
9826 A constructor declared without the function-specifier
9827 explicit that can be called with a single parameter
9828 specifies a conversion from the type of its first
9829 parameter to the type of its class. Such a constructor
9830 is called a converting constructor. */
9832 DECL_NONCONVERTING_P (decl) = 1;
9834 else if (!staticp && !dependent_type_p (type)
9835 && !COMPLETE_TYPE_P (complete_type (type))
9836 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
9839 error ("field %qD has incomplete type", unqualified_id);
9841 error ("name %qT has incomplete type", type);
9843 /* If we're instantiating a template, tell them which
9844 instantiation made the field's type be incomplete. */
9845 if (current_class_type
9846 && TYPE_NAME (current_class_type)
9847 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
9849 && declspecs->type == type)
9850 error (" in instantiation of template %qT",
9851 current_class_type);
9853 return error_mark_node;
9859 error ("%qE is neither function nor member function; "
9860 "cannot be declared friend", unqualified_id);
9868 /* Friends are treated specially. */
9869 if (ctype == current_class_type)
9870 ; /* We already issued a permerror. */
9871 else if (decl && DECL_NAME (decl))
9873 if (template_class_depth (current_class_type) == 0)
9875 decl = check_explicit_specialization
9876 (unqualified_id, decl, template_count,
9877 2 * funcdef_flag + 4);
9878 if (decl == error_mark_node)
9879 return error_mark_node;
9882 DECL_DECLARED_CONSTEXPR_P (decl) = constexpr_p;
9883 decl = do_friend (ctype, unqualified_id, decl,
9889 return error_mark_node;
9892 /* Structure field. It may not be a function, except for C++. */
9894 if (decl == NULL_TREE)
9900 /* An attempt is being made to initialize a non-static
9901 member. But, from [class.mem]:
9903 4 A member-declarator can contain a
9904 constant-initializer only if it declares a static
9905 member (_class.static_) of integral or enumeration
9906 type, see _class.static.data_.
9908 This used to be relatively common practice, but
9909 the rest of the compiler does not correctly
9910 handle the initialization unless the member is
9911 static so we make it static below. */
9912 if (cxx_dialect >= cxx0x)
9914 sorry ("non-static data member initializers");
9918 permerror (input_location, "ISO C++ forbids initialization of member %qD",
9920 permerror (input_location, "making %qD static", unqualified_id);
9925 if (uses_template_parms (type))
9926 /* We'll check at instantiation time. */
9928 else if (constexpr_p)
9929 /* constexpr has the same requirements. */
9931 else if (check_static_variable_definition (unqualified_id,
9933 /* If we just return the declaration, crashes
9934 will sometimes occur. We therefore return
9935 void_type_node, as if this was a friend
9936 declaration, to cause callers to completely
9937 ignore this declaration. */
9938 return error_mark_node;
9943 /* C++ allows static class members. All other work
9944 for this is done by grokfield. */
9945 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
9946 set_linkage_for_static_data_member (decl);
9947 /* Even if there is an in-class initialization, DECL
9948 is considered undefined until an out-of-class
9949 definition is provided. */
9950 DECL_EXTERNAL (decl) = 1;
9953 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
9955 if (constexpr_p && !initialized)
9957 error ("constexpr static data member %qD must have an "
9958 "initializer", decl);
9959 constexpr_p = false;
9966 error ("non-static data member %qE declared %<constexpr%>",
9968 constexpr_p = false;
9970 decl = build_decl (input_location,
9971 FIELD_DECL, unqualified_id, type);
9972 DECL_NONADDRESSABLE_P (decl) = bitfield;
9973 if (bitfield && !unqualified_id)
9974 TREE_NO_WARNING (decl) = 1;
9976 if (storage_class == sc_mutable)
9978 DECL_MUTABLE_P (decl) = 1;
9979 storage_class = sc_none;
9983 bad_specifiers (decl, BSP_FIELD, virtualp,
9984 memfn_quals != TYPE_UNQUALIFIED,
9985 inlinep, friendp, raises != NULL_TREE);
9988 else if (TREE_CODE (type) == FUNCTION_TYPE
9989 || TREE_CODE (type) == METHOD_TYPE)
9994 if (!unqualified_id)
9995 return error_mark_node;
9997 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
9998 original_name = dname;
10000 original_name = unqualified_id;
10002 if (storage_class == sc_auto)
10003 error ("storage class %<auto%> invalid for function %qs", name);
10004 else if (storage_class == sc_register)
10005 error ("storage class %<register%> invalid for function %qs", name);
10007 error ("storage class %<__thread%> invalid for function %qs", name);
10009 /* Function declaration not at top level.
10010 Storage classes other than `extern' are not allowed
10011 and `extern' makes no difference. */
10012 if (! toplevel_bindings_p ()
10013 && (storage_class == sc_static
10014 || declspecs->specs[(int)ds_inline])
10017 if (storage_class == sc_static)
10018 pedwarn (input_location, OPT_pedantic,
10019 "%<static%> specified invalid for function %qs "
10020 "declared out of global scope", name);
10022 pedwarn (input_location, OPT_pedantic,
10023 "%<inline%> specifier invalid for function %qs "
10024 "declared out of global scope", name);
10027 if (ctype != NULL_TREE
10028 && TREE_CODE (ctype) != NAMESPACE_DECL && !MAYBE_CLASS_TYPE_P (ctype))
10030 error ("%q#T is not a class or a namespace", ctype);
10034 if (ctype == NULL_TREE)
10038 error ("virtual non-class function %qs", name);
10041 else if (sfk == sfk_constructor
10042 || sfk == sfk_destructor)
10044 error (funcdef_flag
10045 ? "%qs defined in a non-class scope"
10046 : "%qs declared in a non-class scope", name);
10051 /* Record presence of `static'. */
10052 publicp = (ctype != NULL_TREE
10053 || storage_class == sc_extern
10054 || storage_class != sc_static);
10056 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
10057 virtualp, flags, memfn_quals, raises,
10059 publicp, inlinep | (2 * constexpr_p), sfk,
10061 template_count, in_namespace, attrlist,
10062 declarator->id_loc);
10063 if (decl == NULL_TREE)
10064 return error_mark_node;
10068 int invalid_static = 0;
10070 /* Don't allow a static member function in a class, and forbid
10071 declaring main to be static. */
10072 if (TREE_CODE (type) == METHOD_TYPE)
10074 permerror (input_location, "cannot declare member function %qD to have "
10075 "static linkage", decl);
10076 invalid_static = 1;
10078 else if (current_function_decl)
10080 /* FIXME need arm citation */
10081 error ("cannot declare static function inside another function");
10082 invalid_static = 1;
10085 if (invalid_static)
10088 storage_class = sc_none;
10094 /* It's a variable. */
10096 /* An uninitialized decl with `extern' is a reference. */
10097 decl = grokvardecl (type, unqualified_id,
10100 (type_quals & TYPE_QUAL_CONST) != 0,
10101 ctype ? ctype : in_namespace);
10102 bad_specifiers (decl, BSP_VAR, virtualp,
10103 memfn_quals != TYPE_UNQUALIFIED,
10104 inlinep, friendp, raises != NULL_TREE);
10108 DECL_CONTEXT (decl) = ctype;
10111 permerror (input_location, "%<static%> may not be used when defining "
10112 "(as opposed to declaring) a static data member");
10114 storage_class = sc_none;
10116 if (storage_class == sc_register && TREE_STATIC (decl))
10118 error ("static member %qD declared %<register%>", decl);
10119 storage_class = sc_none;
10121 if (storage_class == sc_extern && pedantic)
10123 pedwarn (input_location, OPT_pedantic,
10124 "cannot explicitly declare member %q#D to have "
10125 "extern linkage", decl);
10126 storage_class = sc_none;
10129 else if (constexpr_p && DECL_EXTERNAL (decl))
10130 error ("declaration of constexpr variable %qD is not a definition",
10134 if (storage_class == sc_extern && initialized && !funcdef_flag)
10136 if (toplevel_bindings_p ())
10138 /* It's common practice (and completely valid) to have a const
10139 be initialized and declared extern. */
10140 if (!(type_quals & TYPE_QUAL_CONST))
10141 warning (0, "%qs initialized and declared %<extern%>", name);
10145 error ("%qs has both %<extern%> and initializer", name);
10146 return error_mark_node;
10150 /* Record `register' declaration for warnings on &
10151 and in case doing stupid register allocation. */
10153 if (storage_class == sc_register)
10154 DECL_REGISTER (decl) = 1;
10155 else if (storage_class == sc_extern)
10156 DECL_THIS_EXTERN (decl) = 1;
10157 else if (storage_class == sc_static)
10158 DECL_THIS_STATIC (decl) = 1;
10160 /* Don't forget constexprness. */
10162 DECL_DECLARED_CONSTEXPR_P (decl) = true;
10164 /* Record constancy and volatility on the DECL itself . There's
10165 no need to do this when processing a template; we'll do this
10166 for the instantiated declaration based on the type of DECL. */
10167 if (!processing_template_decl)
10168 cp_apply_type_quals_to_decl (type_quals, decl);
10174 /* Subroutine of start_function. Ensure that each of the parameter
10175 types (as listed in PARMS) is complete, as is required for a
10176 function definition. */
10179 require_complete_types_for_parms (tree parms)
10181 for (; parms; parms = DECL_CHAIN (parms))
10183 if (dependent_type_p (TREE_TYPE (parms)))
10185 if (!VOID_TYPE_P (TREE_TYPE (parms))
10186 && complete_type_or_else (TREE_TYPE (parms), parms))
10188 relayout_decl (parms);
10189 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
10192 /* grokparms or complete_type_or_else will have already issued
10194 TREE_TYPE (parms) = error_mark_node;
10198 /* Returns nonzero if T is a local variable. */
10201 local_variable_p (const_tree t)
10203 if ((TREE_CODE (t) == VAR_DECL
10204 /* A VAR_DECL with a context that is a _TYPE is a static data
10206 && !TYPE_P (CP_DECL_CONTEXT (t))
10207 /* Any other non-local variable must be at namespace scope. */
10208 && !DECL_NAMESPACE_SCOPE_P (t))
10209 || (TREE_CODE (t) == PARM_DECL))
10215 /* Like local_variable_p, but suitable for use as a tree-walking
10219 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
10220 void *data ATTRIBUTE_UNUSED)
10222 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
10224 else if (TYPE_P (*tp))
10225 *walk_subtrees = 0;
10231 /* Check that ARG, which is a default-argument expression for a
10232 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
10233 something goes wrong. DECL may also be a _TYPE node, rather than a
10234 DECL, if there is no DECL available. */
10237 check_default_argument (tree decl, tree arg)
10242 if (TREE_CODE (arg) == DEFAULT_ARG)
10243 /* We get a DEFAULT_ARG when looking at an in-class declaration
10244 with a default argument. Ignore the argument for now; we'll
10245 deal with it after the class is complete. */
10254 decl_type = TREE_TYPE (decl);
10256 if (arg == error_mark_node
10257 || decl == error_mark_node
10258 || TREE_TYPE (arg) == error_mark_node
10259 || decl_type == error_mark_node)
10260 /* Something already went wrong. There's no need to check
10262 return error_mark_node;
10264 /* [dcl.fct.default]
10266 A default argument expression is implicitly converted to the
10268 if (!TREE_TYPE (arg)
10269 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
10272 error ("default argument for %q#D has type %qT",
10273 decl, TREE_TYPE (arg));
10275 error ("default argument for parameter of type %qT has type %qT",
10276 decl_type, TREE_TYPE (arg));
10278 return error_mark_node;
10281 /* [dcl.fct.default]
10283 Local variables shall not be used in default argument
10286 The keyword `this' shall not be used in a default argument of a
10287 member function. */
10288 var = cp_walk_tree_without_duplicates (&arg, local_variable_p_walkfn, NULL);
10291 error ("default argument %qE uses local variable %qD", arg, var);
10292 return error_mark_node;
10299 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
10302 type_is_deprecated (tree type)
10304 enum tree_code code;
10305 if (TREE_DEPRECATED (type))
10307 if (TYPE_NAME (type)
10308 && TREE_DEPRECATED (TYPE_NAME (type)))
10311 /* Do warn about using typedefs to a deprecated class. */
10312 if (TAGGED_TYPE_P (type) && type != TYPE_MAIN_VARIANT (type))
10313 return type_is_deprecated (TYPE_MAIN_VARIANT (type));
10315 code = TREE_CODE (type);
10317 if (code == POINTER_TYPE || code == REFERENCE_TYPE
10318 || code == OFFSET_TYPE || code == FUNCTION_TYPE
10319 || code == METHOD_TYPE || code == ARRAY_TYPE)
10320 return type_is_deprecated (TREE_TYPE (type));
10322 if (TYPE_PTRMEMFUNC_P (type))
10323 return type_is_deprecated
10324 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type))));
10329 /* Decode the list of parameter types for a function type.
10330 Given the list of things declared inside the parens,
10331 return a list of types.
10333 If this parameter does not end with an ellipsis, we append
10336 *PARMS is set to the chain of PARM_DECLs created. */
10339 grokparms (tree parmlist, tree *parms)
10341 tree result = NULL_TREE;
10342 tree decls = NULL_TREE;
10346 for (parm = parmlist; parm != NULL_TREE; parm = TREE_CHAIN (parm))
10348 tree type = NULL_TREE;
10349 tree init = TREE_PURPOSE (parm);
10350 tree decl = TREE_VALUE (parm);
10351 const char *errmsg;
10353 if (parm == void_list_node)
10356 if (! decl || TREE_TYPE (decl) == error_mark_node)
10359 type = TREE_TYPE (decl);
10360 if (VOID_TYPE_P (type))
10362 if (same_type_p (type, void_type_node)
10363 && DECL_SELF_REFERENCE_P (type)
10364 && !DECL_NAME (decl) && !result && TREE_CHAIN (parm) == void_list_node)
10365 /* this is a parmlist of `(void)', which is ok. */
10367 cxx_incomplete_type_error (decl, type);
10368 /* It's not a good idea to actually create parameters of
10369 type `void'; other parts of the compiler assume that a
10370 void type terminates the parameter list. */
10371 type = error_mark_node;
10372 TREE_TYPE (decl) = error_mark_node;
10375 if (type != error_mark_node
10376 && TYPE_FOR_JAVA (type)
10377 && MAYBE_CLASS_TYPE_P (type))
10379 error ("parameter %qD has Java class type", decl);
10380 type = error_mark_node;
10381 TREE_TYPE (decl) = error_mark_node;
10385 if (type != error_mark_node
10386 && (errmsg = targetm.invalid_parameter_type (type)))
10389 type = error_mark_node;
10390 TREE_TYPE (decl) = error_mark_node;
10393 if (type != error_mark_node)
10395 if (deprecated_state != DEPRECATED_SUPPRESS)
10397 tree deptype = type_is_deprecated (type);
10399 warn_deprecated_use (deptype, NULL_TREE);
10402 /* Top-level qualifiers on the parameters are
10403 ignored for function types. */
10404 type = cp_build_qualified_type (type, 0);
10405 if (TREE_CODE (type) == METHOD_TYPE)
10407 error ("parameter %qD invalidly declared method type", decl);
10408 type = build_pointer_type (type);
10409 TREE_TYPE (decl) = type;
10411 else if (abstract_virtuals_error (decl, type))
10412 any_error = 1; /* Seems like a good idea. */
10413 else if (POINTER_TYPE_P (type))
10415 /* [dcl.fct]/6, parameter types cannot contain pointers
10416 (references) to arrays of unknown bound. */
10417 tree t = TREE_TYPE (type);
10418 int ptr = TYPE_PTR_P (type);
10422 if (TYPE_PTR_P (t))
10424 else if (TREE_CODE (t) != ARRAY_TYPE)
10426 else if (!TYPE_DOMAIN (t))
10430 if (TREE_CODE (t) == ARRAY_TYPE)
10432 ? G_("parameter %qD includes pointer to array of "
10433 "unknown bound %qT")
10434 : G_("parameter %qD includes reference to array of "
10435 "unknown bound %qT"),
10441 else if (init && !processing_template_decl)
10442 init = check_default_argument (decl, init);
10445 if (TREE_CODE (decl) == PARM_DECL
10446 && FUNCTION_PARAMETER_PACK_P (decl)
10447 && TREE_CHAIN (parm)
10448 && TREE_CHAIN (parm) != void_list_node)
10449 error ("parameter packs must be at the end of the parameter list");
10451 DECL_CHAIN (decl) = decls;
10453 result = tree_cons (init, type, result);
10455 decls = nreverse (decls);
10456 result = nreverse (result);
10458 result = chainon (result, void_list_node);
10465 /* D is a constructor or overloaded `operator='.
10467 Let T be the class in which D is declared. Then, this function
10470 -1 if D's is an ill-formed constructor or copy assignment operator
10471 whose first parameter is of type `T'.
10472 0 if D is not a copy constructor or copy assignment
10474 1 if D is a copy constructor or copy assignment operator whose
10475 first parameter is a reference to non-const qualified T.
10476 2 if D is a copy constructor or copy assignment operator whose
10477 first parameter is a reference to const qualified T.
10479 This function can be used as a predicate. Positive values indicate
10480 a copy constructor and nonzero values indicate a copy assignment
10484 copy_fn_p (const_tree d)
10490 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
10492 if (TREE_CODE (d) == TEMPLATE_DECL
10493 || (DECL_TEMPLATE_INFO (d)
10494 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
10495 /* Instantiations of template member functions are never copy
10496 functions. Note that member functions of templated classes are
10497 represented as template functions internally, and we must
10498 accept those as copy functions. */
10501 args = FUNCTION_FIRST_USER_PARMTYPE (d);
10505 arg_type = TREE_VALUE (args);
10506 if (arg_type == error_mark_node)
10509 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
10511 /* Pass by value copy assignment operator. */
10514 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
10515 && !TYPE_REF_IS_RVALUE (arg_type)
10516 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
10518 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
10524 args = TREE_CHAIN (args);
10526 if (args && args != void_list_node && !TREE_PURPOSE (args))
10527 /* There are more non-optional args. */
10533 /* D is a constructor or overloaded `operator='.
10535 Let T be the class in which D is declared. Then, this function
10536 returns true when D is a move constructor or move assignment
10537 operator, false otherwise. */
10540 move_fn_p (const_tree d)
10544 bool result = false;
10546 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
10548 if (cxx_dialect == cxx98)
10549 /* There are no move constructors if we are in C++98 mode. */
10552 if (TREE_CODE (d) == TEMPLATE_DECL
10553 || (DECL_TEMPLATE_INFO (d)
10554 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
10555 /* Instantiations of template member functions are never copy
10556 functions. Note that member functions of templated classes are
10557 represented as template functions internally, and we must
10558 accept those as copy functions. */
10561 args = FUNCTION_FIRST_USER_PARMTYPE (d);
10565 arg_type = TREE_VALUE (args);
10566 if (arg_type == error_mark_node)
10569 if (TREE_CODE (arg_type) == REFERENCE_TYPE
10570 && TYPE_REF_IS_RVALUE (arg_type)
10571 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)),
10575 args = TREE_CHAIN (args);
10577 if (args && args != void_list_node && !TREE_PURPOSE (args))
10578 /* There are more non-optional args. */
10584 /* Remember any special properties of member function DECL. */
10587 grok_special_member_properties (tree decl)
10591 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
10594 class_type = DECL_CONTEXT (decl);
10595 if (DECL_CONSTRUCTOR_P (decl))
10597 int ctor = copy_fn_p (decl);
10599 if (!DECL_ARTIFICIAL (decl))
10600 TYPE_HAS_USER_CONSTRUCTOR (class_type) = 1;
10606 A non-template constructor for class X is a copy
10607 constructor if its first parameter is of type X&, const
10608 X&, volatile X& or const volatile X&, and either there
10609 are no other parameters or else all other parameters have
10610 default arguments. */
10611 TYPE_HAS_COPY_CTOR (class_type) = 1;
10612 if (user_provided_p (decl))
10613 TYPE_HAS_COMPLEX_COPY_CTOR (class_type) = 1;
10615 TYPE_HAS_CONST_COPY_CTOR (class_type) = 1;
10617 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
10619 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
10620 if (user_provided_p (decl))
10621 TYPE_HAS_COMPLEX_DFLT (class_type) = 1;
10623 else if (move_fn_p (decl) && user_provided_p (decl))
10624 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type) = 1;
10625 else if (is_list_ctor (decl))
10626 TYPE_HAS_LIST_CTOR (class_type) = 1;
10628 if (DECL_DECLARED_CONSTEXPR_P (decl)
10629 && !copy_fn_p (decl) && !move_fn_p (decl))
10630 TYPE_HAS_CONSTEXPR_CTOR (class_type) = 1;
10632 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
10636 A non-template assignment operator for class X is a copy
10637 assignment operator if its parameter is of type X, X&, const
10638 X&, volatile X& or const volatile X&. */
10640 int assop = copy_fn_p (decl);
10644 TYPE_HAS_COPY_ASSIGN (class_type) = 1;
10645 if (user_provided_p (decl))
10646 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type) = 1;
10648 TYPE_HAS_CONST_COPY_ASSIGN (class_type) = 1;
10650 else if (move_fn_p (decl) && user_provided_p (decl))
10651 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type) = 1;
10653 /* Destructors are handled in check_methods. */
10656 /* Check a constructor DECL has the correct form. Complains
10657 if the class has a constructor of the form X(X). */
10660 grok_ctor_properties (const_tree ctype, const_tree decl)
10662 int ctor_parm = copy_fn_p (decl);
10668 A declaration of a constructor for a class X is ill-formed if
10669 its first parameter is of type (optionally cv-qualified) X
10670 and either there are no other parameters or else all other
10671 parameters have default arguments.
10673 We *don't* complain about member template instantiations that
10674 have this form, though; they can occur as we try to decide
10675 what constructor to use during overload resolution. Since
10676 overload resolution will never prefer such a constructor to
10677 the non-template copy constructor (which is either explicitly
10678 or implicitly defined), there's no need to worry about their
10679 existence. Theoretically, they should never even be
10680 instantiated, but that's hard to forestall. */
10681 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10689 /* An operator with this code is unary, but can also be binary. */
10692 ambi_op_p (enum tree_code code)
10694 return (code == INDIRECT_REF
10695 || code == ADDR_EXPR
10696 || code == UNARY_PLUS_EXPR
10697 || code == NEGATE_EXPR
10698 || code == PREINCREMENT_EXPR
10699 || code == PREDECREMENT_EXPR);
10702 /* An operator with this name can only be unary. */
10705 unary_op_p (enum tree_code code)
10707 return (code == TRUTH_NOT_EXPR
10708 || code == BIT_NOT_EXPR
10709 || code == COMPONENT_REF
10710 || code == TYPE_EXPR);
10713 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
10714 errors are issued for invalid declarations. */
10717 grok_op_properties (tree decl, bool complain)
10719 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
10721 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
10722 tree name = DECL_NAME (decl);
10723 enum tree_code operator_code;
10728 /* Count the number of arguments and check for ellipsis. */
10729 for (argtype = argtypes, arity = 0;
10730 argtype && argtype != void_list_node;
10731 argtype = TREE_CHAIN (argtype))
10733 ellipsis_p = !argtype;
10735 class_type = DECL_CONTEXT (decl);
10736 if (class_type && !CLASS_TYPE_P (class_type))
10737 class_type = NULL_TREE;
10739 if (DECL_CONV_FN_P (decl))
10740 operator_code = TYPE_EXPR;
10744 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
10745 if (ansi_opname (CODE) == name) \
10747 operator_code = (CODE); \
10750 else if (ansi_assopname (CODE) == name) \
10752 operator_code = (CODE); \
10753 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
10757 #include "operators.def"
10758 #undef DEF_OPERATOR
10760 gcc_unreachable ();
10763 gcc_assert (operator_code != MAX_TREE_CODES);
10764 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10767 switch (operator_code)
10770 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
10774 TYPE_GETS_DELETE (class_type) |= 1;
10778 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
10781 case VEC_DELETE_EXPR:
10782 TYPE_GETS_DELETE (class_type) |= 2;
10789 /* [basic.std.dynamic.allocation]/1:
10791 A program is ill-formed if an allocation function is declared
10792 in a namespace scope other than global scope or declared static
10795 The same also holds true for deallocation functions. */
10796 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
10797 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10799 if (DECL_NAMESPACE_SCOPE_P (decl))
10801 if (CP_DECL_CONTEXT (decl) != global_namespace)
10803 error ("%qD may not be declared within a namespace", decl);
10806 else if (!TREE_PUBLIC (decl))
10808 error ("%qD may not be declared as static", decl);
10814 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
10816 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
10817 DECL_IS_OPERATOR_NEW (decl) = 1;
10819 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10820 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
10823 /* An operator function must either be a non-static member function
10824 or have at least one parameter of a class, a reference to a class,
10825 an enumeration, or a reference to an enumeration. 13.4.0.6 */
10826 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
10828 if (operator_code == TYPE_EXPR
10829 || operator_code == CALL_EXPR
10830 || operator_code == COMPONENT_REF
10831 || operator_code == ARRAY_REF
10832 || operator_code == NOP_EXPR)
10834 error ("%qD must be a nonstatic member function", decl);
10841 if (DECL_STATIC_FUNCTION_P (decl))
10843 error ("%qD must be either a non-static member "
10844 "function or a non-member function", decl);
10848 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
10850 tree arg = non_reference (TREE_VALUE (p));
10851 if (arg == error_mark_node)
10854 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
10855 because these checks are performed even on
10856 template functions. */
10857 if (MAYBE_CLASS_TYPE_P (arg)
10858 || TREE_CODE (arg) == ENUMERAL_TYPE)
10862 if (!p || p == void_list_node)
10865 error ("%qD must have an argument of class or "
10866 "enumerated type", decl);
10872 /* There are no restrictions on the arguments to an overloaded
10874 if (operator_code == CALL_EXPR)
10877 /* Warn about conversion operators that will never be used. */
10878 if (IDENTIFIER_TYPENAME_P (name)
10879 && ! DECL_TEMPLATE_INFO (decl)
10881 /* Warn only declaring the function; there is no need to
10882 warn again about out-of-class definitions. */
10883 && class_type == current_class_type)
10885 tree t = TREE_TYPE (name);
10886 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
10889 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
10891 if (TREE_CODE (t) == VOID_TYPE)
10892 warning (OPT_Wconversion,
10894 ? G_("conversion to a reference to void "
10895 "will never use a type conversion operator")
10896 : G_("conversion to void "
10897 "will never use a type conversion operator"));
10898 else if (class_type)
10900 if (t == class_type)
10901 warning (OPT_Wconversion,
10903 ? G_("conversion to a reference to the same type "
10904 "will never use a type conversion operator")
10905 : G_("conversion to the same type "
10906 "will never use a type conversion operator"));
10907 /* Don't force t to be complete here. */
10908 else if (MAYBE_CLASS_TYPE_P (t)
10909 && COMPLETE_TYPE_P (t)
10910 && DERIVED_FROM_P (t, class_type))
10911 warning (OPT_Wconversion,
10913 ? G_("conversion to a reference to a base class "
10914 "will never use a type conversion operator")
10915 : G_("conversion to a base class "
10916 "will never use a type conversion operator"));
10921 if (operator_code == COND_EXPR)
10924 error ("ISO C++ prohibits overloading operator ?:");
10927 else if (ellipsis_p)
10929 error ("%qD must not have variable number of arguments", decl);
10932 else if (ambi_op_p (operator_code))
10935 /* We pick the one-argument operator codes by default, so
10936 we don't have to change anything. */
10938 else if (arity == 2)
10940 /* If we thought this was a unary operator, we now know
10941 it to be a binary operator. */
10942 switch (operator_code)
10945 operator_code = MULT_EXPR;
10949 operator_code = BIT_AND_EXPR;
10952 case UNARY_PLUS_EXPR:
10953 operator_code = PLUS_EXPR;
10957 operator_code = MINUS_EXPR;
10960 case PREINCREMENT_EXPR:
10961 operator_code = POSTINCREMENT_EXPR;
10964 case PREDECREMENT_EXPR:
10965 operator_code = POSTDECREMENT_EXPR;
10969 gcc_unreachable ();
10972 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10974 if ((operator_code == POSTINCREMENT_EXPR
10975 || operator_code == POSTDECREMENT_EXPR)
10976 && ! processing_template_decl
10977 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
10980 error ("postfix %qD must take %<int%> as its argument",
10983 error ("postfix %qD must take %<int%> as its second "
10991 error ("%qD must take either zero or one argument", decl);
10993 error ("%qD must take either one or two arguments", decl);
10997 /* More Effective C++ rule 6. */
10999 && (operator_code == POSTINCREMENT_EXPR
11000 || operator_code == POSTDECREMENT_EXPR
11001 || operator_code == PREINCREMENT_EXPR
11002 || operator_code == PREDECREMENT_EXPR))
11004 tree arg = TREE_VALUE (argtypes);
11005 tree ret = TREE_TYPE (TREE_TYPE (decl));
11006 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
11007 arg = TREE_TYPE (arg);
11008 arg = TYPE_MAIN_VARIANT (arg);
11009 if (operator_code == PREINCREMENT_EXPR
11010 || operator_code == PREDECREMENT_EXPR)
11012 if (TREE_CODE (ret) != REFERENCE_TYPE
11013 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
11015 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
11016 build_reference_type (arg));
11020 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
11021 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
11025 else if (unary_op_p (operator_code))
11030 error ("%qD must take %<void%>", decl);
11032 error ("%qD must take exactly one argument", decl);
11036 else /* if (binary_op_p (operator_code)) */
11041 error ("%qD must take exactly one argument", decl);
11043 error ("%qD must take exactly two arguments", decl);
11047 /* More Effective C++ rule 7. */
11049 && (operator_code == TRUTH_ANDIF_EXPR
11050 || operator_code == TRUTH_ORIF_EXPR
11051 || operator_code == COMPOUND_EXPR))
11052 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
11056 /* Effective C++ rule 23. */
11059 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
11060 && (operator_code == PLUS_EXPR
11061 || operator_code == MINUS_EXPR
11062 || operator_code == TRUNC_DIV_EXPR
11063 || operator_code == MULT_EXPR
11064 || operator_code == TRUNC_MOD_EXPR)
11065 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
11066 warning (OPT_Weffc__, "%qD should return by value", decl);
11068 /* [over.oper]/8 */
11069 for (; argtypes && argtypes != void_list_node;
11070 argtypes = TREE_CHAIN (argtypes))
11071 if (TREE_PURPOSE (argtypes))
11073 TREE_PURPOSE (argtypes) = NULL_TREE;
11074 if (operator_code == POSTINCREMENT_EXPR
11075 || operator_code == POSTDECREMENT_EXPR)
11077 pedwarn (input_location, OPT_pedantic, "%qD cannot have default arguments",
11082 error ("%qD cannot have default arguments", decl);
11090 /* Return a string giving the keyword associate with CODE. */
11092 static const char *
11093 tag_name (enum tag_types code)
11105 case typename_type:
11108 gcc_unreachable ();
11112 /* Name lookup in an elaborated-type-specifier (after the keyword
11113 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
11114 elaborated-type-specifier is invalid, issue a diagnostic and return
11115 error_mark_node; otherwise, return the *_TYPE to which it referred.
11116 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
11119 check_elaborated_type_specifier (enum tag_types tag_code,
11121 bool allow_template_p)
11127 struct S { struct S *p; };
11129 name lookup will find the TYPE_DECL for the implicit "S::S"
11130 typedef. Adjust for that here. */
11131 if (DECL_SELF_REFERENCE_P (decl))
11132 decl = TYPE_NAME (TREE_TYPE (decl));
11134 type = TREE_TYPE (decl);
11136 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
11137 is false for this case as well. */
11138 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
11140 error ("using template type parameter %qT after %qs",
11141 type, tag_name (tag_code));
11142 return error_mark_node;
11146 If the identifier resolves to a typedef-name or a template
11147 type-parameter, the elaborated-type-specifier is ill-formed.
11149 In other words, the only legitimate declaration to use in the
11150 elaborated type specifier is the implicit typedef created when
11151 the type is declared. */
11152 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
11153 && !DECL_SELF_REFERENCE_P (decl)
11154 && tag_code != typename_type)
11156 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
11157 error ("%q+D has a previous declaration here", decl);
11158 return error_mark_node;
11160 else if (TREE_CODE (type) != RECORD_TYPE
11161 && TREE_CODE (type) != UNION_TYPE
11162 && tag_code != enum_type
11163 && tag_code != typename_type)
11165 error ("%qT referred to as %qs", type, tag_name (tag_code));
11166 error ("%q+T has a previous declaration here", type);
11167 return error_mark_node;
11169 else if (TREE_CODE (type) != ENUMERAL_TYPE
11170 && tag_code == enum_type)
11172 error ("%qT referred to as enum", type);
11173 error ("%q+T has a previous declaration here", type);
11174 return error_mark_node;
11176 else if (!allow_template_p
11177 && TREE_CODE (type) == RECORD_TYPE
11178 && CLASSTYPE_IS_TEMPLATE (type))
11180 /* If a class template appears as elaborated type specifier
11181 without a template header such as:
11183 template <class T> class C {};
11184 void f(class C); // No template header here
11186 then the required template argument is missing. */
11187 error ("template argument required for %<%s %T%>",
11188 tag_name (tag_code),
11189 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
11190 return error_mark_node;
11196 /* Lookup NAME in elaborate type specifier in scope according to
11197 SCOPE and issue diagnostics if necessary.
11198 Return *_TYPE node upon success, NULL_TREE when the NAME is not
11199 found, and ERROR_MARK_NODE for type error. */
11202 lookup_and_check_tag (enum tag_types tag_code, tree name,
11203 tag_scope scope, bool template_header_p)
11207 if (scope == ts_global)
11209 /* First try ordinary name lookup, ignoring hidden class name
11210 injected via friend declaration. */
11211 decl = lookup_name_prefer_type (name, 2);
11212 /* If that fails, the name will be placed in the smallest
11213 non-class, non-function-prototype scope according to 3.3.1/5.
11214 We may already have a hidden name declared as friend in this
11215 scope. So lookup again but not ignoring hidden names.
11216 If we find one, that name will be made visible rather than
11217 creating a new tag. */
11219 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
11222 decl = lookup_type_scope (name, scope);
11224 if (decl && DECL_CLASS_TEMPLATE_P (decl))
11225 decl = DECL_TEMPLATE_RESULT (decl);
11227 if (decl && TREE_CODE (decl) == TYPE_DECL)
11229 /* Look for invalid nested type:
11233 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
11235 error ("%qD has the same name as the class in which it is "
11238 return error_mark_node;
11241 /* Two cases we need to consider when deciding if a class
11242 template is allowed as an elaborated type specifier:
11243 1. It is a self reference to its own class.
11244 2. It comes with a template header.
11248 template <class T> class C {
11249 class C *c1; // DECL_SELF_REFERENCE_P is true
11252 template <class U> class C; // template_header_p is true
11253 template <class T> class C<T>::D {
11254 class C *c2; // DECL_SELF_REFERENCE_P is true
11257 t = check_elaborated_type_specifier (tag_code,
11260 | DECL_SELF_REFERENCE_P (decl));
11263 else if (decl && TREE_CODE (decl) == TREE_LIST)
11265 error ("reference to %qD is ambiguous", name);
11266 print_candidates (decl);
11267 return error_mark_node;
11273 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
11274 Define the tag as a forward-reference if it is not defined.
11276 If a declaration is given, process it here, and report an error if
11277 multiple declarations are not identical.
11279 SCOPE is TS_CURRENT when this is also a definition. Only look in
11280 the current frame for the name (since C++ allows new names in any
11281 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
11282 declaration. Only look beginning from the current scope outward up
11283 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
11285 TEMPLATE_HEADER_P is true when this declaration is preceded by
11286 a set of template parameters. */
11289 xref_tag_1 (enum tag_types tag_code, tree name,
11290 tag_scope scope, bool template_header_p)
11292 enum tree_code code;
11294 tree context = NULL_TREE;
11296 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
11302 code = RECORD_TYPE;
11308 code = ENUMERAL_TYPE;
11311 gcc_unreachable ();
11314 /* In case of anonymous name, xref_tag is only called to
11315 make type node and push name. Name lookup is not required. */
11316 if (ANON_AGGRNAME_P (name))
11319 t = lookup_and_check_tag (tag_code, name,
11320 scope, template_header_p);
11322 if (t == error_mark_node)
11323 return error_mark_node;
11325 if (scope != ts_current && t && current_class_type
11326 && template_class_depth (current_class_type)
11327 && template_header_p)
11329 /* Since SCOPE is not TS_CURRENT, we are not looking at a
11330 definition of this tag. Since, in addition, we are currently
11331 processing a (member) template declaration of a template
11332 class, we must be very careful; consider:
11339 { template <class V>
11340 friend struct S1; };
11342 Here, the S2::S1 declaration should not be confused with the
11343 outer declaration. In particular, the inner version should
11344 have a template parameter of level 2, not level 1. This
11345 would be particularly important if the member declaration
11348 template <class V = U> friend struct S1;
11350 say, when we should tsubst into `U' when instantiating
11351 S2. On the other hand, when presented with:
11361 we must find the inner binding eventually. We
11362 accomplish this by making sure that the new type we
11363 create to represent this declaration has the right
11365 context = TYPE_CONTEXT (t);
11371 /* If no such tag is yet defined, create a forward-reference node
11372 and record it as the "definition".
11373 When a real declaration of this type is found,
11374 the forward-reference will be altered into a real type. */
11375 if (code == ENUMERAL_TYPE)
11377 error ("use of enum %q#D without previous declaration", name);
11378 return error_mark_node;
11382 t = make_class_type (code);
11383 TYPE_CONTEXT (t) = context;
11384 t = pushtag (name, t, scope);
11389 if (template_header_p && MAYBE_CLASS_TYPE_P (t))
11391 if (!redeclare_class_template (t, current_template_parms))
11392 return error_mark_node;
11394 else if (!processing_template_decl
11395 && CLASS_TYPE_P (t)
11396 && CLASSTYPE_IS_TEMPLATE (t))
11398 error ("redeclaration of %qT as a non-template", t);
11399 error ("previous declaration %q+D", t);
11400 return error_mark_node;
11403 /* Make injected friend class visible. */
11404 if (scope != ts_within_enclosing_non_class
11405 && hidden_name_p (TYPE_NAME (t)))
11407 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
11408 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
11410 if (TYPE_TEMPLATE_INFO (t))
11412 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
11413 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
11421 /* Wrapper for xref_tag_1. */
11424 xref_tag (enum tag_types tag_code, tree name,
11425 tag_scope scope, bool template_header_p)
11428 timevar_start (TV_NAME_LOOKUP);
11429 ret = xref_tag_1 (tag_code, name, scope, template_header_p);
11430 timevar_stop (TV_NAME_LOOKUP);
11436 xref_tag_from_type (tree old, tree id, tag_scope scope)
11438 enum tag_types tag_kind;
11440 if (TREE_CODE (old) == RECORD_TYPE)
11441 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
11443 tag_kind = union_type;
11445 if (id == NULL_TREE)
11446 id = TYPE_IDENTIFIER (old);
11448 return xref_tag (tag_kind, id, scope, false);
11451 /* Create the binfo hierarchy for REF with (possibly NULL) base list
11452 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
11453 access_* node, and the TREE_VALUE is the type of the base-class.
11454 Non-NULL TREE_TYPE indicates virtual inheritance.
11456 Returns true if the binfo hierarchy was successfully created,
11457 false if an error was detected. */
11460 xref_basetypes (tree ref, tree base_list)
11463 tree binfo, base_binfo;
11464 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
11465 unsigned max_bases = 0; /* Maximum direct bases. */
11467 tree default_access;
11468 tree igo_prev; /* Track Inheritance Graph Order. */
11470 if (ref == error_mark_node)
11473 /* The base of a derived class is private by default, all others are
11475 default_access = (TREE_CODE (ref) == RECORD_TYPE
11476 && CLASSTYPE_DECLARED_CLASS (ref)
11477 ? access_private_node : access_public_node);
11479 /* First, make sure that any templates in base-classes are
11480 instantiated. This ensures that if we call ourselves recursively
11481 we do not get confused about which classes are marked and which
11483 basep = &base_list;
11486 tree basetype = TREE_VALUE (*basep);
11488 if (!(processing_template_decl && uses_template_parms (basetype))
11489 && !complete_type_or_else (basetype, NULL))
11490 /* An incomplete type. Remove it from the list. */
11491 *basep = TREE_CHAIN (*basep);
11495 if (TREE_TYPE (*basep))
11497 if (CLASS_TYPE_P (basetype))
11498 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
11499 basep = &TREE_CHAIN (*basep);
11503 TYPE_MARKED_P (ref) = 1;
11505 /* The binfo slot should be empty, unless this is an (ill-formed)
11507 if (TYPE_BINFO (ref) && !TYPE_SIZE (ref))
11509 error ("redefinition of %q#T", ref);
11513 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
11515 binfo = make_tree_binfo (max_bases);
11517 TYPE_BINFO (ref) = binfo;
11518 BINFO_OFFSET (binfo) = size_zero_node;
11519 BINFO_TYPE (binfo) = ref;
11521 /* Apply base-class info set up to the variants of this type. */
11522 fixup_type_variants (ref);
11526 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
11527 /* An aggregate cannot have baseclasses. */
11528 CLASSTYPE_NON_AGGREGATE (ref) = 1;
11530 if (TREE_CODE (ref) == UNION_TYPE)
11532 error ("derived union %qT invalid", ref);
11539 if (TYPE_FOR_JAVA (ref))
11541 error ("Java class %qT cannot have multiple bases", ref);
11548 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
11550 if (TYPE_FOR_JAVA (ref))
11552 error ("Java class %qT cannot have virtual bases", ref);
11557 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
11559 tree access = TREE_PURPOSE (base_list);
11560 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
11561 tree basetype = TREE_VALUE (base_list);
11563 if (access == access_default_node)
11564 access = default_access;
11566 if (PACK_EXPANSION_P (basetype))
11567 basetype = PACK_EXPANSION_PATTERN (basetype);
11568 if (TREE_CODE (basetype) == TYPE_DECL)
11569 basetype = TREE_TYPE (basetype);
11570 if (!MAYBE_CLASS_TYPE_P (basetype) || TREE_CODE (basetype) == UNION_TYPE)
11572 error ("base type %qT fails to be a struct or class type",
11577 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
11578 TYPE_FOR_JAVA (ref) = 1;
11580 base_binfo = NULL_TREE;
11581 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
11583 base_binfo = TYPE_BINFO (basetype);
11584 /* The original basetype could have been a typedef'd type. */
11585 basetype = BINFO_TYPE (base_binfo);
11587 /* Inherit flags from the base. */
11588 TYPE_HAS_NEW_OPERATOR (ref)
11589 |= TYPE_HAS_NEW_OPERATOR (basetype);
11590 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
11591 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
11592 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
11593 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
11594 CLASSTYPE_DIAMOND_SHAPED_P (ref)
11595 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
11596 CLASSTYPE_REPEATED_BASE_P (ref)
11597 |= CLASSTYPE_REPEATED_BASE_P (basetype);
11600 /* We must do this test after we've seen through a typedef
11602 if (TYPE_MARKED_P (basetype))
11604 if (basetype == ref)
11605 error ("recursive type %qT undefined", basetype);
11607 error ("duplicate base type %qT invalid", basetype);
11611 if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
11612 /* Regenerate the pack expansion for the bases. */
11613 basetype = make_pack_expansion (basetype);
11615 TYPE_MARKED_P (basetype) = 1;
11617 base_binfo = copy_binfo (base_binfo, basetype, ref,
11618 &igo_prev, via_virtual);
11619 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
11620 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
11622 BINFO_BASE_APPEND (binfo, base_binfo);
11623 BINFO_BASE_ACCESS_APPEND (binfo, access);
11626 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
11627 /* If we have space in the vbase vector, we must have shared at
11628 least one of them, and are therefore diamond shaped. */
11629 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
11631 /* Unmark all the types. */
11632 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
11633 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
11634 TYPE_MARKED_P (ref) = 0;
11636 /* Now see if we have a repeated base type. */
11637 if (!CLASSTYPE_REPEATED_BASE_P (ref))
11639 for (base_binfo = binfo; base_binfo;
11640 base_binfo = TREE_CHAIN (base_binfo))
11642 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
11644 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
11647 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
11649 for (base_binfo = binfo; base_binfo;
11650 base_binfo = TREE_CHAIN (base_binfo))
11651 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
11652 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
11661 /* Copies the enum-related properties from type SRC to type DST.
11662 Used with the underlying type of an enum and the enum itself. */
11664 copy_type_enum (tree dst, tree src)
11666 TYPE_MIN_VALUE (dst) = TYPE_MIN_VALUE (src);
11667 TYPE_MAX_VALUE (dst) = TYPE_MAX_VALUE (src);
11668 TYPE_SIZE (dst) = TYPE_SIZE (src);
11669 TYPE_SIZE_UNIT (dst) = TYPE_SIZE_UNIT (src);
11670 SET_TYPE_MODE (dst, TYPE_MODE (src));
11671 TYPE_PRECISION (dst) = TYPE_PRECISION (src);
11672 TYPE_ALIGN (dst) = TYPE_ALIGN (src);
11673 TYPE_USER_ALIGN (dst) = TYPE_USER_ALIGN (src);
11674 TYPE_UNSIGNED (dst) = TYPE_UNSIGNED (src);
11677 /* Begin compiling the definition of an enumeration type.
11680 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
11682 UNDERLYING_TYPE is the type that will be used as the storage for
11683 the enumeration type. This should be NULL_TREE if no storage type
11686 SCOPED_ENUM_P is true if this is a scoped enumeration type.
11688 if IS_NEW is not NULL, gets TRUE iff a new type is created.
11690 Returns the type object, as yet incomplete.
11691 Also records info about it so that build_enumerator
11692 may be used to declare the individual values as they are read. */
11695 start_enum (tree name, tree enumtype, tree underlying_type,
11696 bool scoped_enum_p, bool *is_new)
11698 tree prevtype = NULL_TREE;
11699 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
11703 /* [C++0x dcl.enum]p5:
11705 If not explicitly specified, the underlying type of a scoped
11706 enumeration type is int. */
11707 if (!underlying_type && scoped_enum_p)
11708 underlying_type = integer_type_node;
11710 if (underlying_type)
11711 underlying_type = cv_unqualified (underlying_type);
11713 /* If this is the real definition for a previous forward reference,
11714 fill in the contents in the same object that used to be the
11715 forward reference. */
11717 enumtype = lookup_and_check_tag (enum_type, name,
11718 /*tag_scope=*/ts_current,
11719 /*template_header_p=*/false);
11721 /* In case of a template_decl, the only check that should be deferred
11722 to instantiation time is the comparison of underlying types. */
11723 if (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE)
11725 if (scoped_enum_p != SCOPED_ENUM_P (enumtype))
11727 error_at (input_location, "scoped/unscoped mismatch "
11728 "in enum %q#T", enumtype);
11729 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
11730 "previous definition here");
11731 enumtype = error_mark_node;
11733 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype) != !! underlying_type)
11735 error_at (input_location, "underlying type mismatch "
11736 "in enum %q#T", enumtype);
11737 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
11738 "previous definition here");
11739 enumtype = error_mark_node;
11741 else if (underlying_type && ENUM_UNDERLYING_TYPE (enumtype)
11742 && !dependent_type_p (underlying_type)
11743 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype))
11744 && !same_type_p (underlying_type,
11745 ENUM_UNDERLYING_TYPE (enumtype)))
11747 error_at (input_location, "different underlying type "
11748 "in enum %q#T", enumtype);
11749 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
11750 "previous definition here");
11751 underlying_type = NULL_TREE;
11755 if (!enumtype || TREE_CODE (enumtype) != ENUMERAL_TYPE
11756 || processing_template_decl)
11758 /* In case of error, make a dummy enum to allow parsing to
11760 if (enumtype == error_mark_node)
11762 name = make_anon_name ();
11763 enumtype = NULL_TREE;
11766 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
11767 of an opaque enum, or an opaque enum of an already defined
11768 enumeration (C++0x only).
11769 In any other case, it'll be NULL_TREE. */
11775 prevtype = enumtype;
11776 enumtype = cxx_make_type (ENUMERAL_TYPE);
11777 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
11778 if (enumtype == error_mark_node)
11779 return error_mark_node;
11781 /* The enum is considered opaque until the opening '{' of the
11782 enumerator list. */
11783 SET_OPAQUE_ENUM_P (enumtype, true);
11784 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype) = !! underlying_type;
11787 SET_SCOPED_ENUM_P (enumtype, scoped_enum_p);
11789 if (underlying_type)
11791 if (CP_INTEGRAL_TYPE_P (underlying_type))
11793 copy_type_enum (enumtype, underlying_type);
11794 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
11796 else if (dependent_type_p (underlying_type))
11797 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
11799 error ("underlying type %<%T%> of %<%T%> must be an integral type",
11800 underlying_type, enumtype);
11803 /* If into a template class, the returned enum is always the first
11804 declaration (opaque or not) seen. This way all the references to
11805 this type will be to the same declaration. The following ones are used
11806 only to check for definition errors. */
11807 if (prevtype && processing_template_decl)
11813 /* After processing and defining all the values of an enumeration type,
11814 install their decls in the enumeration type.
11815 ENUMTYPE is the type object. */
11818 finish_enum_value_list (tree enumtype)
11821 tree underlying_type;
11824 tree minnode, maxnode;
11827 bool fixed_underlying_type_p
11828 = ENUM_UNDERLYING_TYPE (enumtype) != NULL_TREE;
11830 /* We built up the VALUES in reverse order. */
11831 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
11833 /* For an enum defined in a template, just set the type of the values;
11834 all further processing is postponed until the template is
11835 instantiated. We need to set the type so that tsubst of a CONST_DECL
11837 if (processing_template_decl)
11839 for (values = TYPE_VALUES (enumtype);
11841 values = TREE_CHAIN (values))
11842 TREE_TYPE (TREE_VALUE (values)) = enumtype;
11846 /* Determine the minimum and maximum values of the enumerators. */
11847 if (TYPE_VALUES (enumtype))
11849 minnode = maxnode = NULL_TREE;
11851 for (values = TYPE_VALUES (enumtype);
11853 values = TREE_CHAIN (values))
11855 decl = TREE_VALUE (values);
11857 /* [dcl.enum]: Following the closing brace of an enum-specifier,
11858 each enumerator has the type of its enumeration. Prior to the
11859 closing brace, the type of each enumerator is the type of its
11860 initializing value. */
11861 TREE_TYPE (decl) = enumtype;
11863 /* Update the minimum and maximum values, if appropriate. */
11864 value = DECL_INITIAL (decl);
11865 if (value == error_mark_node)
11866 value = integer_zero_node;
11867 /* Figure out what the minimum and maximum values of the
11868 enumerators are. */
11870 minnode = maxnode = value;
11871 else if (tree_int_cst_lt (maxnode, value))
11873 else if (tree_int_cst_lt (value, minnode))
11880 If the enumerator-list is empty, the underlying type is as if
11881 the enumeration had a single enumerator with value 0. */
11882 minnode = maxnode = integer_zero_node;
11884 if (!fixed_underlying_type_p)
11886 /* Compute the number of bits require to represent all values of the
11887 enumeration. We must do this before the type of MINNODE and
11888 MAXNODE are transformed, since tree_int_cst_min_precision relies
11889 on the TREE_TYPE of the value it is passed. */
11890 bool unsignedp = tree_int_cst_sgn (minnode) >= 0;
11891 int lowprec = tree_int_cst_min_precision (minnode, unsignedp);
11892 int highprec = tree_int_cst_min_precision (maxnode, unsignedp);
11893 int precision = MAX (lowprec, highprec);
11895 bool use_short_enum;
11897 /* Determine the underlying type of the enumeration.
11901 The underlying type of an enumeration is an integral type that
11902 can represent all the enumerator values defined in the
11903 enumeration. It is implementation-defined which integral type is
11904 used as the underlying type for an enumeration except that the
11905 underlying type shall not be larger than int unless the value of
11906 an enumerator cannot fit in an int or unsigned int.
11908 We use "int" or an "unsigned int" as the underlying type, even if
11909 a smaller integral type would work, unless the user has
11910 explicitly requested that we use the smallest possible type. The
11911 user can request that for all enumerations with a command line
11912 flag, or for just one enumeration with an attribute. */
11914 use_short_enum = flag_short_enums
11915 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
11917 for (itk = (use_short_enum ? itk_char : itk_int);
11921 underlying_type = integer_types[itk];
11922 if (underlying_type != NULL_TREE
11923 && TYPE_PRECISION (underlying_type) >= precision
11924 && TYPE_UNSIGNED (underlying_type) == unsignedp)
11927 if (itk == itk_none)
11931 IF no integral type can represent all the enumerator values, the
11932 enumeration is ill-formed. */
11933 error ("no integral type can represent all of the enumerator values "
11934 "for %qT", enumtype);
11935 precision = TYPE_PRECISION (long_long_integer_type_node);
11936 underlying_type = integer_types[itk_unsigned_long_long];
11941 The value of sizeof() applied to an enumeration type, an object
11942 of an enumeration type, or an enumerator, is the value of sizeof()
11943 applied to the underlying type. */
11944 copy_type_enum (enumtype, underlying_type);
11946 /* Compute the minimum and maximum values for the type.
11950 For an enumeration where emin is the smallest enumerator and emax
11951 is the largest, the values of the enumeration are the values of the
11952 underlying type in the range bmin to bmax, where bmin and bmax are,
11953 respectively, the smallest and largest values of the smallest bit-
11954 field that can store emin and emax. */
11956 /* The middle-end currently assumes that types with TYPE_PRECISION
11957 narrower than their underlying type are suitably zero or sign
11958 extended to fill their mode. Similarly, it assumes that the front
11959 end assures that a value of a particular type must be within
11960 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
11962 We used to set these fields based on bmin and bmax, but that led
11963 to invalid assumptions like optimizing away bounds checking. So
11964 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
11965 TYPE_MAX_VALUE to the values for the mode above and only restrict
11966 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
11967 ENUM_UNDERLYING_TYPE (enumtype)
11968 = build_distinct_type_copy (underlying_type);
11969 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype)) = precision;
11970 set_min_and_max_values_for_integral_type
11971 (ENUM_UNDERLYING_TYPE (enumtype), precision, unsignedp);
11973 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
11974 if (flag_strict_enums)
11975 set_min_and_max_values_for_integral_type (enumtype, precision,
11979 underlying_type = ENUM_UNDERLYING_TYPE (enumtype);
11981 /* Convert each of the enumerators to the type of the underlying
11982 type of the enumeration. */
11983 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
11985 location_t saved_location;
11987 decl = TREE_VALUE (values);
11988 saved_location = input_location;
11989 input_location = DECL_SOURCE_LOCATION (decl);
11990 if (fixed_underlying_type_p)
11991 /* If the enumeration type has a fixed underlying type, we
11992 already checked all of the enumerator values. */
11993 value = DECL_INITIAL (decl);
11995 value = perform_implicit_conversion (underlying_type,
11996 DECL_INITIAL (decl),
11997 tf_warning_or_error);
11998 input_location = saved_location;
12000 /* Do not clobber shared ints. */
12001 value = copy_node (value);
12003 TREE_TYPE (value) = enumtype;
12004 DECL_INITIAL (decl) = value;
12007 /* Fix up all variant types of this enum type. */
12008 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
12009 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
12011 /* Finish debugging output for this type. */
12012 rest_of_type_compilation (enumtype, namespace_bindings_p ());
12015 /* Finishes the enum type. This is called only the first time an
12016 enumeration is seen, be it opaque or odinary.
12017 ENUMTYPE is the type object. */
12020 finish_enum (tree enumtype)
12022 if (processing_template_decl)
12024 if (at_function_scope_p ())
12025 add_stmt (build_min (TAG_DEFN, enumtype));
12029 /* Here there should not be any variants of this type. */
12030 gcc_assert (enumtype == TYPE_MAIN_VARIANT (enumtype)
12031 && !TYPE_NEXT_VARIANT (enumtype));
12034 /* Build and install a CONST_DECL for an enumeration constant of the
12035 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
12036 LOC is the location of NAME.
12037 Assignment of sequential values by default is handled here. */
12040 build_enumerator (tree name, tree value, tree enumtype, location_t loc)
12046 /* If the VALUE was erroneous, pretend it wasn't there; that will
12047 result in the enum being assigned the next value in sequence. */
12048 if (value == error_mark_node)
12051 /* Remove no-op casts from the value. */
12053 STRIP_TYPE_NOPS (value);
12055 if (! processing_template_decl)
12057 /* Validate and default VALUE. */
12058 if (value != NULL_TREE)
12060 value = cxx_constant_value (value);
12062 if (TREE_CODE (value) == INTEGER_CST
12063 && INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value)))
12065 value = perform_integral_promotions (value);
12069 error ("enumerator value for %qD is not an integer constant", name);
12074 /* Default based on previous value. */
12075 if (value == NULL_TREE)
12077 if (TYPE_VALUES (enumtype))
12080 unsigned HOST_WIDE_INT lo;
12084 /* The next value is the previous value plus one.
12085 add_double doesn't know the type of the target expression,
12086 so we must check with int_fits_type_p as well. */
12087 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
12088 if (error_operand_p (prev_value))
12089 value = error_mark_node;
12092 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
12093 TREE_INT_CST_HIGH (prev_value),
12095 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
12097 |= !int_fits_type_p (value, TREE_TYPE (prev_value));
12101 error ("overflow in enumeration values at %qD", name);
12102 value = error_mark_node;
12107 value = integer_zero_node;
12110 /* Remove no-op casts from the value. */
12111 STRIP_TYPE_NOPS (value);
12113 /* If the underlying type of the enum is fixed, check whether
12114 the enumerator values fits in the underlying type. If it
12115 does not fit, the program is ill-formed [C++0x dcl.enum]. */
12116 if (ENUM_UNDERLYING_TYPE (enumtype)
12118 && TREE_CODE (value) == INTEGER_CST
12119 && !int_fits_type_p (value, ENUM_UNDERLYING_TYPE (enumtype)))
12121 error ("enumerator value %E is too large for underlying type %<%T%>",
12122 value, ENUM_UNDERLYING_TYPE (enumtype));
12124 /* Silently convert the value so that we can continue. */
12125 value = perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype),
12130 /* C++ associates enums with global, function, or class declarations. */
12131 context = current_scope ();
12133 /* Build the actual enumeration constant. Note that the enumeration
12134 constants have the underlying type of the enum (if it is fixed)
12135 or the type of their initializer (if the underlying type of the
12136 enum is not fixed):
12140 If the underlying type is fixed, the type of each enumerator
12141 prior to the closing brace is the underlying type; if the
12142 initializing value of an enumerator cannot be represented by
12143 the underlying type, the program is ill-formed. If the
12144 underlying type is not fixed, the type of each enumerator is
12145 the type of its initializing value.
12147 If the underlying type is not fixed, it will be computed by
12148 finish_enum and we will reset the type of this enumerator. Of
12149 course, if we're processing a template, there may be no value. */
12150 type = value ? TREE_TYPE (value) : NULL_TREE;
12152 if (context && context == current_class_type)
12153 /* This enum declaration is local to the class. We need the full
12154 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
12155 decl = build_lang_decl_loc (loc, CONST_DECL, name, type);
12157 /* It's a global enum, or it's local to a function. (Note local to
12158 a function could mean local to a class method. */
12159 decl = build_decl (loc, CONST_DECL, name, type);
12161 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
12162 TREE_CONSTANT (decl) = 1;
12163 TREE_READONLY (decl) = 1;
12164 DECL_INITIAL (decl) = value;
12166 if (context && context == current_class_type && !SCOPED_ENUM_P (enumtype))
12167 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
12168 on the TYPE_FIELDS list for `S'. (That's so that you can say
12169 things like `S::i' later.) */
12170 finish_member_declaration (decl);
12174 /* Add this enumeration constant to the list for this type. */
12175 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
12178 /* Look for an enumerator with the given NAME within the enumeration
12179 type ENUMTYPE. This routine is used primarily for qualified name
12180 lookup into an enumerator in C++0x, e.g.,
12182 enum class Color { Red, Green, Blue };
12184 Color color = Color::Red;
12186 Returns the value corresponding to the enumerator, or
12187 NULL_TREE if no such enumerator was found. */
12189 lookup_enumerator (tree enumtype, tree name)
12192 gcc_assert (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE);
12194 e = purpose_member (name, TYPE_VALUES (enumtype));
12195 return e? TREE_VALUE (e) : NULL_TREE;
12199 /* We're defining DECL. Make sure that its type is OK. */
12202 check_function_type (tree decl, tree current_function_parms)
12204 tree fntype = TREE_TYPE (decl);
12205 tree return_type = complete_type (TREE_TYPE (fntype));
12207 /* In a function definition, arg types must be complete. */
12208 require_complete_types_for_parms (current_function_parms);
12210 if (dependent_type_p (return_type))
12212 if (!COMPLETE_OR_VOID_TYPE_P (return_type)
12213 || (TYPE_FOR_JAVA (return_type) && MAYBE_CLASS_TYPE_P (return_type)))
12215 tree args = TYPE_ARG_TYPES (fntype);
12217 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
12218 error ("return type %q#T is incomplete", return_type);
12220 error ("return type has Java class type %q#T", return_type);
12222 /* Make it return void instead. */
12223 if (TREE_CODE (fntype) == METHOD_TYPE)
12224 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
12226 TREE_CHAIN (args));
12228 fntype = build_function_type (void_type_node, args);
12230 = build_exception_variant (fntype,
12231 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
12232 fntype = (cp_build_type_attribute_variant
12233 (fntype, TYPE_ATTRIBUTES (TREE_TYPE (decl))));
12234 TREE_TYPE (decl) = fntype;
12237 abstract_virtuals_error (decl, TREE_TYPE (fntype));
12240 /* Create the FUNCTION_DECL for a function definition.
12241 DECLSPECS and DECLARATOR are the parts of the declaration;
12242 they describe the function's name and the type it returns,
12243 but twisted together in a fashion that parallels the syntax of C.
12245 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
12246 DECLARATOR is really the DECL for the function we are about to
12247 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
12248 indicating that the function is an inline defined in-class.
12250 This function creates a binding context for the function body
12251 as well as setting up the FUNCTION_DECL in current_function_decl.
12253 For C++, we must first check whether that datum makes any sense.
12254 For example, "class A local_a(1,2);" means that variable local_a
12255 is an aggregate of type A, which should have a constructor
12256 applied to it with the argument list [1, 2].
12258 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
12259 or may be a BLOCK if the function has been defined previously
12260 in this translation unit. On exit, DECL_INITIAL (decl1) will be
12261 error_mark_node if the function has never been defined, or
12262 a BLOCK if the function has been defined somewhere. */
12265 start_preparsed_function (tree decl1, tree attrs, int flags)
12267 tree ctype = NULL_TREE;
12270 int doing_friend = 0;
12271 struct cp_binding_level *bl;
12272 tree current_function_parms;
12273 struct c_fileinfo *finfo
12274 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
12275 bool honor_interface;
12277 /* Sanity check. */
12278 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
12279 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
12281 fntype = TREE_TYPE (decl1);
12282 if (TREE_CODE (fntype) == METHOD_TYPE)
12283 ctype = TYPE_METHOD_BASETYPE (fntype);
12285 /* ISO C++ 11.4/5. A friend function defined in a class is in
12286 the (lexical) scope of the class in which it is defined. */
12287 if (!ctype && DECL_FRIEND_P (decl1))
12289 ctype = DECL_FRIEND_CONTEXT (decl1);
12291 /* CTYPE could be null here if we're dealing with a template;
12292 for example, `inline friend float foo()' inside a template
12293 will have no CTYPE set. */
12294 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
12300 if (DECL_DECLARED_INLINE_P (decl1)
12301 && lookup_attribute ("noinline", attrs))
12302 warning (0, "inline function %q+D given attribute noinline", decl1);
12304 /* Handle gnu_inline attribute. */
12305 if (GNU_INLINE_P (decl1))
12307 DECL_EXTERNAL (decl1) = 1;
12308 DECL_NOT_REALLY_EXTERN (decl1) = 0;
12309 DECL_INTERFACE_KNOWN (decl1) = 1;
12310 DECL_DISREGARD_INLINE_LIMITS (decl1) = 1;
12313 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
12314 /* This is a constructor, we must ensure that any default args
12315 introduced by this definition are propagated to the clones
12316 now. The clones are used directly in overload resolution. */
12317 adjust_clone_args (decl1);
12319 /* Sometimes we don't notice that a function is a static member, and
12320 build a METHOD_TYPE for it. Fix that up now. */
12321 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
12322 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
12324 revert_static_member_fn (decl1);
12328 /* Set up current_class_type, and enter the scope of the class, if
12331 push_nested_class (ctype);
12332 else if (DECL_STATIC_FUNCTION_P (decl1))
12333 push_nested_class (DECL_CONTEXT (decl1));
12335 /* Now that we have entered the scope of the class, we must restore
12336 the bindings for any template parameters surrounding DECL1, if it
12337 is an inline member template. (Order is important; consider the
12338 case where a template parameter has the same name as a field of
12339 the class.) It is not until after this point that
12340 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
12341 if (flags & SF_INCLASS_INLINE)
12342 maybe_begin_member_template_processing (decl1);
12344 /* Effective C++ rule 15. */
12346 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
12347 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
12348 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
12350 /* Make the init_value nonzero so pushdecl knows this is not tentative.
12351 error_mark_node is replaced below (in poplevel) with the BLOCK. */
12352 if (!DECL_INITIAL (decl1))
12353 DECL_INITIAL (decl1) = error_mark_node;
12355 /* This function exists in static storage.
12356 (This does not mean `static' in the C sense!) */
12357 TREE_STATIC (decl1) = 1;
12359 /* We must call push_template_decl after current_class_type is set
12360 up. (If we are processing inline definitions after exiting a
12361 class scope, current_class_type will be NULL_TREE until set above
12362 by push_nested_class.) */
12363 if (processing_template_decl)
12365 /* FIXME: Handle error_mark_node more gracefully. */
12366 tree newdecl1 = push_template_decl (decl1);
12367 if (newdecl1 != error_mark_node)
12371 /* We are now in the scope of the function being defined. */
12372 current_function_decl = decl1;
12374 /* Save the parm names or decls from this function's declarator
12375 where store_parm_decls will find them. */
12376 current_function_parms = DECL_ARGUMENTS (decl1);
12378 /* Make sure the parameter and return types are reasonable. When
12379 you declare a function, these types can be incomplete, but they
12380 must be complete when you define the function. */
12381 check_function_type (decl1, current_function_parms);
12383 /* Build the return declaration for the function. */
12384 restype = TREE_TYPE (fntype);
12385 if (DECL_RESULT (decl1) == NULL_TREE)
12389 resdecl = build_decl (input_location, RESULT_DECL, 0, restype);
12390 DECL_ARTIFICIAL (resdecl) = 1;
12391 DECL_IGNORED_P (resdecl) = 1;
12392 DECL_RESULT (decl1) = resdecl;
12394 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
12397 /* Let the user know we're compiling this function. */
12398 announce_function (decl1);
12400 /* Record the decl so that the function name is defined.
12401 If we already have a decl for this name, and it is a FUNCTION_DECL,
12402 use the old decl. */
12403 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
12405 /* A specialization is not used to guide overload resolution. */
12406 if (!DECL_FUNCTION_MEMBER_P (decl1)
12407 && !(DECL_USE_TEMPLATE (decl1) &&
12408 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
12410 tree olddecl = pushdecl (decl1);
12412 if (olddecl == error_mark_node)
12413 /* If something went wrong when registering the declaration,
12414 use DECL1; we have to have a FUNCTION_DECL to use when
12415 parsing the body of the function. */
12419 /* Otherwise, OLDDECL is either a previous declaration
12420 of the same function or DECL1 itself. */
12422 if (warn_missing_declarations
12423 && olddecl == decl1
12424 && !DECL_MAIN_P (decl1)
12425 && TREE_PUBLIC (decl1)
12426 && !DECL_DECLARED_INLINE_P (decl1))
12430 /* Check whether DECL1 is in an anonymous
12432 for (context = DECL_CONTEXT (decl1);
12434 context = DECL_CONTEXT (context))
12436 if (TREE_CODE (context) == NAMESPACE_DECL
12437 && DECL_NAME (context) == NULL_TREE)
12441 if (context == NULL)
12442 warning (OPT_Wmissing_declarations,
12443 "no previous declaration for %q+D", decl1);
12451 /* We need to set the DECL_CONTEXT. */
12452 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
12453 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
12455 fntype = TREE_TYPE (decl1);
12457 /* If #pragma weak applies, mark the decl appropriately now.
12458 The pragma only applies to global functions. Because
12459 determining whether or not the #pragma applies involves
12460 computing the mangled name for the declaration, we cannot
12461 apply the pragma until after we have merged this declaration
12462 with any previous declarations; if the original declaration
12463 has a linkage specification, that specification applies to
12464 the definition as well, and may affect the mangled name. */
12465 if (DECL_FILE_SCOPE_P (decl1))
12466 maybe_apply_pragma_weak (decl1);
12469 /* constexpr functions must have literal argument types and
12470 literal return type. */
12471 validate_constexpr_fundecl (decl1);
12473 /* Reset this in case the call to pushdecl changed it. */
12474 current_function_decl = decl1;
12476 gcc_assert (DECL_INITIAL (decl1));
12478 /* This function may already have been parsed, in which case just
12479 return; our caller will skip over the body without parsing. */
12480 if (DECL_INITIAL (decl1) != error_mark_node)
12483 /* Initialize RTL machinery. We cannot do this until
12484 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
12485 even when processing a template; this is how we get
12486 CFUN set up, and our per-function variables initialized.
12487 FIXME factor out the non-RTL stuff. */
12488 bl = current_binding_level;
12489 allocate_struct_function (decl1, processing_template_decl);
12491 /* Initialize the language data structures. Whenever we start
12492 a new function, we destroy temporaries in the usual way. */
12493 cfun->language = ggc_alloc_cleared_language_function ();
12494 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
12495 current_binding_level = bl;
12497 /* Even though we're inside a function body, we still don't want to
12498 call expand_expr to calculate the size of a variable-sized array.
12499 We haven't necessarily assigned RTL to all variables yet, so it's
12500 not safe to try to expand expressions involving them. */
12501 cfun->dont_save_pending_sizes_p = 1;
12503 /* Start the statement-tree, start the tree now. */
12504 DECL_SAVED_TREE (decl1) = push_stmt_list ();
12506 /* If we are (erroneously) defining a function that we have already
12507 defined before, wipe out what we knew before. */
12508 if (!DECL_PENDING_INLINE_P (decl1))
12509 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
12511 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
12513 /* We know that this was set up by `grokclassfn'. We do not
12514 wait until `store_parm_decls', since evil parse errors may
12515 never get us to that point. Here we keep the consistency
12516 between `current_class_type' and `current_class_ptr'. */
12517 tree t = DECL_ARGUMENTS (decl1);
12519 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
12520 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
12522 cp_function_chain->x_current_class_ref
12523 = cp_build_indirect_ref (t, RO_NULL, tf_warning_or_error);
12524 cp_function_chain->x_current_class_ptr = t;
12526 /* Constructors and destructors need to know whether they're "in
12527 charge" of initializing virtual base classes. */
12528 t = DECL_CHAIN (t);
12529 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
12531 current_in_charge_parm = t;
12532 t = DECL_CHAIN (t);
12534 if (DECL_HAS_VTT_PARM_P (decl1))
12536 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
12537 current_vtt_parm = t;
12541 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
12542 /* Implicitly-defined methods (like the
12543 destructor for a class in which no destructor
12544 is explicitly declared) must not be defined
12545 until their definition is needed. So, we
12546 ignore interface specifications for
12547 compiler-generated functions. */
12548 && !DECL_ARTIFICIAL (decl1));
12550 if (DECL_INTERFACE_KNOWN (decl1))
12552 tree ctx = decl_function_context (decl1);
12554 if (DECL_NOT_REALLY_EXTERN (decl1))
12555 DECL_EXTERNAL (decl1) = 0;
12557 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
12558 && TREE_PUBLIC (ctx))
12559 /* This is a function in a local class in an extern inline
12561 comdat_linkage (decl1);
12563 /* If this function belongs to an interface, it is public.
12564 If it belongs to someone else's interface, it is also external.
12565 This only affects inlines and template instantiations. */
12566 else if (!finfo->interface_unknown && honor_interface)
12568 if (DECL_DECLARED_INLINE_P (decl1)
12569 || DECL_TEMPLATE_INSTANTIATION (decl1)
12570 || processing_template_decl)
12572 DECL_EXTERNAL (decl1)
12573 = (finfo->interface_only
12574 || (DECL_DECLARED_INLINE_P (decl1)
12575 && ! flag_implement_inlines
12576 && !DECL_VINDEX (decl1)));
12578 /* For WIN32 we also want to put these in linkonce sections. */
12579 maybe_make_one_only (decl1);
12582 DECL_EXTERNAL (decl1) = 0;
12583 DECL_INTERFACE_KNOWN (decl1) = 1;
12584 /* If this function is in an interface implemented in this file,
12585 make sure that the back end knows to emit this function
12587 if (!DECL_EXTERNAL (decl1))
12588 mark_needed (decl1);
12590 else if (finfo->interface_unknown && finfo->interface_only
12591 && honor_interface)
12593 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
12594 interface, we will have both finfo->interface_unknown and
12595 finfo->interface_only set. In that case, we don't want to
12596 use the normal heuristics because someone will supply a
12597 #pragma implementation elsewhere, and deducing it here would
12598 produce a conflict. */
12599 comdat_linkage (decl1);
12600 DECL_EXTERNAL (decl1) = 0;
12601 DECL_INTERFACE_KNOWN (decl1) = 1;
12602 DECL_DEFER_OUTPUT (decl1) = 1;
12606 /* This is a definition, not a reference.
12607 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
12608 if (!GNU_INLINE_P (decl1))
12609 DECL_EXTERNAL (decl1) = 0;
12611 if ((DECL_DECLARED_INLINE_P (decl1)
12612 || DECL_TEMPLATE_INSTANTIATION (decl1))
12613 && ! DECL_INTERFACE_KNOWN (decl1))
12614 DECL_DEFER_OUTPUT (decl1) = 1;
12616 DECL_INTERFACE_KNOWN (decl1) = 1;
12619 /* Determine the ELF visibility attribute for the function. We must not
12620 do this before calling "pushdecl", as we must allow "duplicate_decls"
12621 to merge any attributes appropriately. We also need to wait until
12623 if (!DECL_CLONED_FUNCTION_P (decl1))
12624 determine_visibility (decl1);
12626 begin_scope (sk_function_parms, decl1);
12630 if (DECL_DESTRUCTOR_P (decl1)
12631 || (DECL_CONSTRUCTOR_P (decl1)
12632 && targetm.cxx.cdtor_returns_this ()))
12634 cdtor_label = build_decl (input_location,
12635 LABEL_DECL, NULL_TREE, NULL_TREE);
12636 DECL_CONTEXT (cdtor_label) = current_function_decl;
12639 start_fname_decls ();
12641 store_parm_decls (current_function_parms);
12645 /* Like start_preparsed_function, except that instead of a
12646 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
12648 Returns 1 on success. If the DECLARATOR is not suitable for a function
12649 (it defines a datum instead), we return 0, which tells
12650 yyparse to report a parse error. */
12653 start_function (cp_decl_specifier_seq *declspecs,
12654 const cp_declarator *declarator,
12659 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
12660 if (decl1 == error_mark_node)
12662 /* If the declarator is not suitable for a function definition,
12663 cause a syntax error. */
12664 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
12666 error ("invalid function declaration");
12670 if (DECL_MAIN_P (decl1))
12671 /* main must return int. grokfndecl should have corrected it
12672 (and issued a diagnostic) if the user got it wrong. */
12673 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
12674 integer_type_node));
12676 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
12681 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
12685 use_eh_spec_block (tree fn)
12687 return (flag_exceptions && flag_enforce_eh_specs
12688 && !processing_template_decl
12689 && !type_throw_all_p (TREE_TYPE (fn))
12690 /* We insert the EH_SPEC_BLOCK only in the original
12691 function; then, it is copied automatically to the
12693 && !DECL_CLONED_FUNCTION_P (fn)
12694 /* Implicitly-generated constructors and destructors have
12695 exception specifications. However, those specifications
12696 are the union of the possible exceptions specified by the
12697 constructors/destructors for bases and members, so no
12698 unallowed exception will ever reach this function. By
12699 not creating the EH_SPEC_BLOCK we save a little memory,
12700 and we avoid spurious warnings about unreachable
12702 && !DECL_ARTIFICIAL (fn));
12705 /* Store the parameter declarations into the current function declaration.
12706 This is called after parsing the parameter declarations, before
12707 digesting the body of the function.
12709 Also install to binding contour return value identifier, if any. */
12712 store_parm_decls (tree current_function_parms)
12714 tree fndecl = current_function_decl;
12717 /* This is a chain of any other decls that came in among the parm
12718 declarations. If a parm is declared with enum {foo, bar} x;
12719 then CONST_DECLs for foo and bar are put here. */
12720 tree nonparms = NULL_TREE;
12722 if (current_function_parms)
12724 /* This case is when the function was defined with an ANSI prototype.
12725 The parms already have decls, so we need not do anything here
12726 except record them as in effect
12727 and complain if any redundant old-style parm decls were written. */
12729 tree specparms = current_function_parms;
12732 /* Must clear this because it might contain TYPE_DECLs declared
12734 current_binding_level->names = NULL;
12736 /* If we're doing semantic analysis, then we'll call pushdecl
12737 for each of these. We must do them in reverse order so that
12738 they end in the correct forward order. */
12739 specparms = nreverse (specparms);
12741 for (parm = specparms; parm; parm = next)
12743 next = DECL_CHAIN (parm);
12744 if (TREE_CODE (parm) == PARM_DECL)
12746 if (DECL_NAME (parm) == NULL_TREE
12747 || TREE_CODE (parm) != VOID_TYPE)
12750 error ("parameter %qD declared void", parm);
12754 /* If we find an enum constant or a type tag,
12755 put it aside for the moment. */
12756 TREE_CHAIN (parm) = NULL_TREE;
12757 nonparms = chainon (nonparms, parm);
12761 /* Get the decls in their original chain order and record in the
12762 function. This is all and only the PARM_DECLs that were
12763 pushed into scope by the loop above. */
12764 DECL_ARGUMENTS (fndecl) = getdecls ();
12767 DECL_ARGUMENTS (fndecl) = NULL_TREE;
12769 /* Now store the final chain of decls for the arguments
12770 as the decl-chain of the current lexical scope.
12771 Put the enumerators in as well, at the front so that
12772 DECL_ARGUMENTS is not modified. */
12773 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
12775 if (use_eh_spec_block (current_function_decl))
12776 current_eh_spec_block = begin_eh_spec_block ();
12780 /* We have finished doing semantic analysis on DECL, but have not yet
12781 generated RTL for its body. Save away our current state, so that
12782 when we want to generate RTL later we know what to do. */
12785 save_function_data (tree decl)
12787 struct language_function *f;
12789 /* Save the language-specific per-function data so that we can
12790 get it back when we really expand this function. */
12791 gcc_assert (!DECL_PENDING_INLINE_P (decl));
12794 f = ggc_alloc_language_function ();
12795 memcpy (f, cp_function_chain, sizeof (struct language_function));
12796 DECL_SAVED_FUNCTION_DATA (decl) = f;
12798 /* Clear out the bits we don't need. */
12799 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
12800 f->bindings = NULL;
12801 f->x_local_names = NULL;
12805 /* Set the return value of the constructor (if present). */
12808 finish_constructor_body (void)
12813 if (targetm.cxx.cdtor_returns_this ()
12814 && (! TYPE_FOR_JAVA (current_class_type)))
12816 /* Any return from a constructor will end up here. */
12817 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12819 val = DECL_ARGUMENTS (current_function_decl);
12820 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12821 DECL_RESULT (current_function_decl), val);
12822 /* Return the address of the object. */
12823 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12824 add_stmt (exprstmt);
12828 /* Do all the processing for the beginning of a destructor; set up the
12829 vtable pointers and cleanups for bases and members. */
12832 begin_destructor_body (void)
12834 tree compound_stmt;
12836 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
12837 issued an error message. We still want to try to process the
12838 body of the function, but initialize_vtbl_ptrs will crash if
12839 TYPE_BINFO is NULL. */
12840 if (COMPLETE_TYPE_P (current_class_type))
12842 compound_stmt = begin_compound_stmt (0);
12843 /* Make all virtual function table pointers in non-virtual base
12844 classes point to CURRENT_CLASS_TYPE's virtual function
12846 initialize_vtbl_ptrs (current_class_ptr);
12847 finish_compound_stmt (compound_stmt);
12849 /* And insert cleanups for our bases and members so that they
12850 will be properly destroyed if we throw. */
12851 push_base_cleanups ();
12855 /* At the end of every destructor we generate code to delete the object if
12856 necessary. Do that now. */
12859 finish_destructor_body (void)
12863 /* Any return from a destructor will end up here; that way all base
12864 and member cleanups will be run when the function returns. */
12865 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12867 /* In a virtual destructor, we must call delete. */
12868 if (DECL_VIRTUAL_P (current_function_decl))
12871 tree virtual_size = cxx_sizeof (current_class_type);
12875 At the point of definition of a virtual destructor (including
12876 an implicit definition), non-placement operator delete shall
12877 be looked up in the scope of the destructor's class and if
12878 found shall be accessible and unambiguous. */
12879 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
12881 /*global_p=*/false,
12882 /*placement=*/NULL_TREE,
12883 /*alloc_fn=*/NULL_TREE);
12885 if_stmt = begin_if_stmt ();
12886 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
12887 current_in_charge_parm,
12890 finish_expr_stmt (exprstmt);
12891 finish_then_clause (if_stmt);
12892 finish_if_stmt (if_stmt);
12895 if (targetm.cxx.cdtor_returns_this ())
12899 val = DECL_ARGUMENTS (current_function_decl);
12900 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12901 DECL_RESULT (current_function_decl), val);
12902 /* Return the address of the object. */
12903 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12904 add_stmt (exprstmt);
12908 /* Do the necessary processing for the beginning of a function body, which
12909 in this case includes member-initializers, but not the catch clauses of
12910 a function-try-block. Currently, this means opening a binding level
12911 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
12914 begin_function_body (void)
12918 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12921 if (processing_template_decl)
12922 /* Do nothing now. */;
12924 /* Always keep the BLOCK node associated with the outermost pair of
12925 curly braces of a function. These are needed for correct
12926 operation of dwarfout.c. */
12927 keep_next_level (true);
12929 stmt = begin_compound_stmt (BCS_FN_BODY);
12931 if (processing_template_decl)
12932 /* Do nothing now. */;
12933 else if (DECL_DESTRUCTOR_P (current_function_decl))
12934 begin_destructor_body ();
12939 /* Do the processing for the end of a function body. Currently, this means
12940 closing out the cleanups for fully-constructed bases and members, and in
12941 the case of the destructor, deleting the object if desired. Again, this
12942 is only meaningful for [cd]tors, since they are the only functions where
12943 there is a significant distinction between the main body and any
12944 function catch clauses. Handling, say, main() return semantics here
12945 would be wrong, as flowing off the end of a function catch clause for
12946 main() would also need to return 0. */
12949 finish_function_body (tree compstmt)
12951 if (compstmt == NULL_TREE)
12954 /* Close the block. */
12955 finish_compound_stmt (compstmt);
12957 if (processing_template_decl)
12958 /* Do nothing now. */;
12959 else if (DECL_CONSTRUCTOR_P (current_function_decl))
12960 finish_constructor_body ();
12961 else if (DECL_DESTRUCTOR_P (current_function_decl))
12962 finish_destructor_body ();
12965 /* Given a function, returns the BLOCK corresponding to the outermost level
12966 of curly braces, skipping the artificial block created for constructor
12970 outer_curly_brace_block (tree fndecl)
12972 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
12973 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12974 /* Skip the artificial function body block. */
12975 block = BLOCK_SUBBLOCKS (block);
12979 /* If FNDECL is a class's key method, add the class to the list of
12980 keyed classes that should be emitted. */
12983 record_key_method_defined (tree fndecl)
12985 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
12986 && DECL_VIRTUAL_P (fndecl)
12987 && !processing_template_decl)
12989 tree fnclass = DECL_CONTEXT (fndecl);
12990 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
12991 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
12995 /* Subroutine of finish_function.
12996 Save the body of constexpr functions for possible
12997 future compile time evaluation. */
13000 maybe_save_function_definition (tree fun)
13002 if (!processing_template_decl
13003 && DECL_DECLARED_CONSTEXPR_P (fun)
13004 && !DECL_CLONED_FUNCTION_P (fun))
13005 register_constexpr_fundef (fun, DECL_SAVED_TREE (fun));
13008 /* Finish up a function declaration and compile that function
13009 all the way to assembler language output. The free the storage
13010 for the function definition.
13012 FLAGS is a bitwise or of the following values:
13014 We just finished processing the body of an in-class inline
13015 function definition. (This processing will have taken place
13016 after the class definition is complete.) */
13019 finish_function (int flags)
13021 tree fndecl = current_function_decl;
13022 tree fntype, ctype = NULL_TREE;
13023 int inclass_inline = (flags & 2) != 0;
13025 /* When we get some parse errors, we can end up without a
13026 current_function_decl, so cope. */
13027 if (fndecl == NULL_TREE)
13028 return error_mark_node;
13030 if (c_dialect_objc ())
13031 objc_finish_function ();
13033 gcc_assert (!defer_mark_used_calls);
13034 defer_mark_used_calls = true;
13036 record_key_method_defined (fndecl);
13038 fntype = TREE_TYPE (fndecl);
13040 /* TREE_READONLY (fndecl) = 1;
13041 This caused &foo to be of type ptr-to-const-function
13042 which then got a warning when stored in a ptr-to-function variable. */
13044 gcc_assert (building_stmt_tree ());
13045 /* The current function is being defined, so its DECL_INITIAL should
13046 be set, and unless there's a multiple definition, it should be
13047 error_mark_node. */
13048 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
13050 /* For a cloned function, we've already got all the code we need;
13051 there's no need to add any extra bits. */
13052 if (!DECL_CLONED_FUNCTION_P (fndecl))
13054 if (DECL_MAIN_P (current_function_decl))
13058 /* Make it so that `main' always returns 0 by default (or
13061 stmt = finish_return_stmt (integer_one_node);
13063 stmt = finish_return_stmt (integer_zero_node);
13065 /* Hack. We don't want the middle-end to warn that this
13066 return is unreachable, so put the statement on the
13069 location_t linezero = linemap_line_start (line_table, 0, 1);
13070 SET_EXPR_LOCATION (stmt, linezero);
13074 if (use_eh_spec_block (current_function_decl))
13075 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
13076 (TREE_TYPE (current_function_decl)),
13077 current_eh_spec_block);
13080 /* If we're saving up tree structure, tie off the function now. */
13081 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
13083 finish_fname_decls ();
13085 /* If this function can't throw any exceptions, remember that. */
13086 if (!processing_template_decl
13087 && !cp_function_chain->can_throw
13088 && !flag_non_call_exceptions
13089 && !decl_replaceable_p (fndecl))
13090 TREE_NOTHROW (fndecl) = 1;
13092 /* This must come after expand_function_end because cleanups might
13093 have declarations (from inline functions) that need to go into
13094 this function's blocks. */
13096 /* If the current binding level isn't the outermost binding level
13097 for this function, either there is a bug, or we have experienced
13098 syntax errors and the statement tree is malformed. */
13099 if (current_binding_level->kind != sk_function_parms)
13101 /* Make sure we have already experienced errors. */
13102 gcc_assert (errorcount);
13104 /* Throw away the broken statement tree and extra binding
13106 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
13108 while (current_binding_level->kind != sk_function_parms)
13110 if (current_binding_level->kind == sk_class)
13111 pop_nested_class ();
13113 poplevel (0, 0, 0);
13116 poplevel (1, 0, 1);
13118 /* Statements should always be full-expressions at the outermost set
13119 of curly braces for a function. */
13120 gcc_assert (stmts_are_full_exprs_p ());
13122 /* Save constexpr function body before it gets munged by
13123 the NRV transformation. */
13124 maybe_save_function_definition (fndecl);
13126 /* Set up the named return value optimization, if we can. Candidate
13127 variables are selected in check_return_expr. */
13128 if (current_function_return_value)
13130 tree r = current_function_return_value;
13133 if (r != error_mark_node
13134 /* This is only worth doing for fns that return in memory--and
13135 simpler, since we don't have to worry about promoted modes. */
13136 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
13137 /* Only allow this for variables declared in the outer scope of
13138 the function so we know that their lifetime always ends with a
13139 return; see g++.dg/opt/nrv6.C. We could be more flexible if
13140 we were to do this optimization in tree-ssa. */
13141 && (outer = outer_curly_brace_block (fndecl))
13142 && chain_member (r, BLOCK_VARS (outer)))
13143 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
13145 current_function_return_value = NULL_TREE;
13148 /* Remember that we were in class scope. */
13149 if (current_class_name)
13150 ctype = current_class_type;
13152 /* Must mark the RESULT_DECL as being in this function. */
13153 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
13155 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
13156 to the FUNCTION_DECL node itself. */
13157 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
13159 /* Save away current state, if appropriate. */
13160 if (!processing_template_decl)
13161 save_function_data (fndecl);
13163 /* Complain if there's just no return statement. */
13164 if (warn_return_type
13165 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
13166 && !dependent_type_p (TREE_TYPE (fntype))
13167 && !current_function_returns_value && !current_function_returns_null
13168 /* Don't complain if we abort or throw. */
13169 && !current_function_returns_abnormally
13170 /* Don't complain if we are declared noreturn. */
13171 && !TREE_THIS_VOLATILE (fndecl)
13172 && !DECL_NAME (DECL_RESULT (fndecl))
13173 && !TREE_NO_WARNING (fndecl)
13174 /* Structor return values (if any) are set by the compiler. */
13175 && !DECL_CONSTRUCTOR_P (fndecl)
13176 && !DECL_DESTRUCTOR_P (fndecl))
13178 warning (OPT_Wreturn_type,
13179 "no return statement in function returning non-void");
13180 TREE_NO_WARNING (fndecl) = 1;
13183 /* Store the end of the function, so that we get good line number
13184 info for the epilogue. */
13185 cfun->function_end_locus = input_location;
13187 /* Complain about parameters that are only set, but never otherwise used. */
13188 if (warn_unused_but_set_parameter
13189 && !processing_template_decl
13190 && errorcount == unused_but_set_errorcount
13191 && !DECL_CLONED_FUNCTION_P (fndecl))
13195 for (decl = DECL_ARGUMENTS (fndecl);
13197 decl = DECL_CHAIN (decl))
13198 if (TREE_USED (decl)
13199 && TREE_CODE (decl) == PARM_DECL
13200 && !DECL_READ_P (decl)
13201 && DECL_NAME (decl)
13202 && !DECL_ARTIFICIAL (decl)
13203 && !TREE_NO_WARNING (decl)
13204 && !DECL_IN_SYSTEM_HEADER (decl)
13205 && TREE_TYPE (decl) != error_mark_node
13206 && TREE_CODE (TREE_TYPE (decl)) != REFERENCE_TYPE
13207 && (!CLASS_TYPE_P (TREE_TYPE (decl))
13208 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
13209 warning (OPT_Wunused_but_set_parameter,
13210 "parameter %q+D set but not used", decl);
13211 unused_but_set_errorcount = errorcount;
13214 /* Genericize before inlining. */
13215 if (!processing_template_decl)
13217 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
13218 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE, fndecl);
13219 cp_genericize (fndecl);
13220 /* Clear out the bits we don't need. */
13221 f->x_current_class_ptr = NULL;
13222 f->x_current_class_ref = NULL;
13223 f->x_eh_spec_block = NULL;
13224 f->x_in_charge_parm = NULL;
13225 f->x_vtt_parm = NULL;
13226 f->x_return_value = NULL;
13227 f->bindings = NULL;
13228 f->extern_decl_map = NULL;
13230 /* Clear out the bits we don't need. */
13231 local_names = NULL;
13233 /* We're leaving the context of this function, so zap cfun. It's still in
13234 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
13236 current_function_decl = NULL;
13238 /* If this is an in-class inline definition, we may have to pop the
13239 bindings for the template parameters that we added in
13240 maybe_begin_member_template_processing when start_function was
13242 if (inclass_inline)
13243 maybe_end_member_template_processing ();
13245 /* Leave the scope of the class. */
13247 pop_nested_class ();
13252 current_function_decl = NULL_TREE;
13254 defer_mark_used_calls = false;
13255 if (deferred_mark_used_calls)
13260 FOR_EACH_VEC_ELT (tree, deferred_mark_used_calls, i, decl)
13262 VEC_free (tree, gc, deferred_mark_used_calls);
13268 /* Create the FUNCTION_DECL for a function definition.
13269 DECLSPECS and DECLARATOR are the parts of the declaration;
13270 they describe the return type and the name of the function,
13271 but twisted together in a fashion that parallels the syntax of C.
13273 This function creates a binding context for the function body
13274 as well as setting up the FUNCTION_DECL in current_function_decl.
13276 Returns a FUNCTION_DECL on success.
13278 If the DECLARATOR is not suitable for a function (it defines a datum
13279 instead), we return 0, which tells yyparse to report a parse error.
13281 May return void_type_node indicating that this method is actually
13282 a friend. See grokfield for more details.
13284 Came here with a `.pushlevel' .
13286 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
13287 CHANGES TO CODE IN `grokfield'. */
13290 grokmethod (cp_decl_specifier_seq *declspecs,
13291 const cp_declarator *declarator, tree attrlist)
13293 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
13296 if (fndecl == error_mark_node)
13297 return error_mark_node;
13299 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
13301 error ("invalid member function declaration");
13302 return error_mark_node;
13306 cplus_decl_attributes (&fndecl, attrlist, 0);
13308 /* Pass friends other than inline friend functions back. */
13309 if (fndecl == void_type_node)
13312 if (DECL_IN_AGGR_P (fndecl))
13314 if (DECL_CLASS_SCOPE_P (fndecl))
13315 error ("%qD is already defined in class %qT", fndecl,
13316 DECL_CONTEXT (fndecl));
13317 return error_mark_node;
13320 check_template_shadow (fndecl);
13322 DECL_DECLARED_INLINE_P (fndecl) = 1;
13323 DECL_NO_INLINE_WARNING_P (fndecl) = 1;
13325 /* We process method specializations in finish_struct_1. */
13326 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
13328 fndecl = push_template_decl (fndecl);
13329 if (fndecl == error_mark_node)
13333 if (! DECL_FRIEND_P (fndecl))
13335 if (DECL_CHAIN (fndecl))
13337 fndecl = copy_node (fndecl);
13338 TREE_CHAIN (fndecl) = NULL_TREE;
13342 cp_finish_decl (fndecl, NULL_TREE, false, NULL_TREE, 0);
13344 DECL_IN_AGGR_P (fndecl) = 1;
13349 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
13350 we can lay it out later, when and if its type becomes complete. */
13353 maybe_register_incomplete_var (tree var)
13355 gcc_assert (TREE_CODE (var) == VAR_DECL);
13357 /* Keep track of variables with incomplete types. */
13358 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
13359 && DECL_EXTERNAL (var))
13361 tree inner_type = TREE_TYPE (var);
13363 while (TREE_CODE (inner_type) == ARRAY_TYPE)
13364 inner_type = TREE_TYPE (inner_type);
13365 inner_type = TYPE_MAIN_VARIANT (inner_type);
13367 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
13368 /* RTTI TD entries are created while defining the type_info. */
13369 || (TYPE_LANG_SPECIFIC (inner_type)
13370 && TYPE_BEING_DEFINED (inner_type)))
13373 = VEC_safe_push (incomplete_var, gc, incomplete_vars, NULL);
13375 iv->incomplete_type = inner_type;
13380 /* Called when a class type (given by TYPE) is defined. If there are
13381 any existing VAR_DECLs whose type has been completed by this
13382 declaration, update them now. */
13385 complete_vars (tree type)
13388 incomplete_var *iv;
13390 for (ix = 0; VEC_iterate (incomplete_var, incomplete_vars, ix, iv); )
13392 if (same_type_p (type, iv->incomplete_type))
13394 tree var = iv->decl;
13395 tree type = TREE_TYPE (var);
13396 /* Complete the type of the variable. The VAR_DECL itself
13397 will be laid out in expand_expr. */
13398 complete_type (type);
13399 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
13400 /* Remove this entry from the list. */
13401 VEC_unordered_remove (incomplete_var, incomplete_vars, ix);
13407 /* Check for pending declarations which may have abstract type. */
13408 complete_type_check_abstract (type);
13411 /* If DECL is of a type which needs a cleanup, build and return an
13412 expression to perform that cleanup here. Return NULL_TREE if no
13413 cleanup need be done. */
13416 cxx_maybe_build_cleanup (tree decl, tsubst_flags_t complain)
13422 /* Assume no cleanup is required. */
13423 cleanup = NULL_TREE;
13425 if (error_operand_p (decl))
13428 /* Handle "__attribute__((cleanup))". We run the cleanup function
13429 before the destructor since the destructor is what actually
13430 terminates the lifetime of the object. */
13431 attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl));
13438 /* Get the name specified by the user for the cleanup function. */
13439 id = TREE_VALUE (TREE_VALUE (attr));
13440 /* Look up the name to find the cleanup function to call. It is
13441 important to use lookup_name here because that is what is
13442 used in c-common.c:handle_cleanup_attribute when performing
13443 initial checks on the attribute. Note that those checks
13444 include ensuring that the function found is not an overloaded
13445 function, or an object with an overloaded call operator,
13446 etc.; we can rely on the fact that the function found is an
13447 ordinary FUNCTION_DECL. */
13448 fn = lookup_name (id);
13449 arg = build_address (decl);
13451 cleanup = cp_build_function_call_nary (fn, complain, arg, NULL_TREE);
13452 if (cleanup == error_mark_node)
13453 return error_mark_node;
13455 /* Handle ordinary C++ destructors. */
13456 type = TREE_TYPE (decl);
13457 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
13459 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
13460 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
13461 && CLASSTYPE_VBASECLASSES (type));
13465 if (TREE_CODE (type) == ARRAY_TYPE)
13468 addr = build_address (decl);
13470 /* Optimize for space over speed here. */
13471 if (!has_vbases || flag_expensive_optimizations)
13472 flags |= LOOKUP_NONVIRTUAL;
13474 call = build_delete (TREE_TYPE (addr), addr,
13475 sfk_complete_destructor, flags, 0, complain);
13476 if (call == error_mark_node)
13477 cleanup = error_mark_node;
13479 cleanup = cp_build_compound_expr (cleanup, call, complain);
13487 /* When a stmt has been parsed, this function is called. */
13494 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
13495 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
13496 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
13499 static_fn_type (tree memfntype)
13504 if (TYPE_PTRMEMFUNC_P (memfntype))
13505 memfntype = TYPE_PTRMEMFUNC_FN_TYPE (memfntype);
13506 if (POINTER_TYPE_P (memfntype)
13507 || TREE_CODE (memfntype) == FUNCTION_DECL)
13508 memfntype = TREE_TYPE (memfntype);
13509 if (TREE_CODE (memfntype) == FUNCTION_TYPE)
13511 gcc_assert (TREE_CODE (memfntype) == METHOD_TYPE);
13512 args = TYPE_ARG_TYPES (memfntype);
13513 fntype = build_function_type (TREE_TYPE (memfntype), TREE_CHAIN (args));
13514 fntype = apply_memfn_quals (fntype, type_memfn_quals (memfntype));
13515 fntype = (cp_build_type_attribute_variant
13516 (fntype, TYPE_ATTRIBUTES (memfntype)));
13517 fntype = (build_exception_variant
13518 (fntype, TYPE_RAISES_EXCEPTIONS (memfntype)));
13522 /* DECL was originally constructed as a non-static member function,
13523 but turned out to be static. Update it accordingly. */
13526 revert_static_member_fn (tree decl)
13528 tree stype = static_fn_type (decl);
13530 if (type_memfn_quals (stype) != TYPE_UNQUALIFIED)
13532 error ("static member function %q#D declared with type qualifiers", decl);
13533 stype = apply_memfn_quals (stype, TYPE_UNQUALIFIED);
13535 TREE_TYPE (decl) = stype;
13537 if (DECL_ARGUMENTS (decl))
13538 DECL_ARGUMENTS (decl) = DECL_CHAIN (DECL_ARGUMENTS (decl));
13539 DECL_STATIC_FUNCTION_P (decl) = 1;
13542 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
13543 one of the language-independent trees. */
13545 enum cp_tree_node_structure_enum
13546 cp_tree_node_structure (union lang_tree_node * t)
13548 switch (TREE_CODE (&t->generic))
13550 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
13551 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
13552 case OVERLOAD: return TS_CP_OVERLOAD;
13553 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
13554 case PTRMEM_CST: return TS_CP_PTRMEM;
13555 case BASELINK: return TS_CP_BASELINK;
13556 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
13557 case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
13558 case TRAIT_EXPR: return TS_CP_TRAIT_EXPR;
13559 case LAMBDA_EXPR: return TS_CP_LAMBDA_EXPR;
13560 case TEMPLATE_INFO: return TS_CP_TEMPLATE_INFO;
13561 default: return TS_CP_GENERIC;
13565 /* Build the void_list_node (void_type_node having been created). */
13567 build_void_list_node (void)
13569 tree t = build_tree_list (NULL_TREE, void_type_node);
13574 cp_missing_noreturn_ok_p (tree decl)
13576 /* A missing noreturn is ok for the `main' function. */
13577 return DECL_MAIN_P (decl);
13580 /* Return the COMDAT group into which DECL should be placed. */
13583 cxx_comdat_group (tree decl)
13587 /* Virtual tables, construction virtual tables, and virtual table
13588 tables all go in a single COMDAT group, named after the primary
13590 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
13591 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
13592 /* For all other DECLs, the COMDAT group is the mangled name of the
13593 declaration itself. */
13596 while (DECL_THUNK_P (decl))
13598 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
13599 into the same section as the target function. In that case
13600 we must return target's name. */
13601 tree target = THUNK_TARGET (decl);
13602 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
13603 && DECL_SECTION_NAME (target) != NULL
13604 && DECL_ONE_ONLY (target))
13609 name = DECL_ASSEMBLER_NAME (decl);
13615 #include "gt-cp-decl.h"