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 (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, tsubst_flags_t);
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,
4908 tsubst_flags_t complain)
4911 bool sized_array_p = (max_index != NULL_TREE);
4912 unsigned HOST_WIDE_INT max_index_cst = 0;
4913 unsigned HOST_WIDE_INT index;
4915 /* The initializer for an array is always a CONSTRUCTOR. */
4916 new_init = build_constructor (init_list_type_node, NULL);
4920 /* Minus 1 is used for zero sized arrays. */
4921 if (integer_all_onesp (max_index))
4924 if (host_integerp (max_index, 1))
4925 max_index_cst = tree_low_cst (max_index, 1);
4926 /* sizetype is sign extended, not zero extended. */
4928 max_index_cst = tree_low_cst (fold_convert (size_type_node, max_index),
4932 /* Loop until there are no more initializers. */
4934 d->cur != d->end && (!sized_array_p || index <= max_index_cst);
4939 check_array_designated_initializer (d->cur);
4940 elt_init = reshape_init_r (elt_type, d, /*first_initializer_p=*/false,
4942 if (elt_init == error_mark_node)
4943 return error_mark_node;
4944 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init),
4945 size_int (index), elt_init);
4946 if (!TREE_CONSTANT (elt_init))
4947 TREE_CONSTANT (new_init) = false;
4953 /* Subroutine of reshape_init_r, processes the initializers for arrays.
4954 Parameters are the same of reshape_init_r. */
4957 reshape_init_array (tree type, reshape_iter *d, tsubst_flags_t complain)
4959 tree max_index = NULL_TREE;
4961 gcc_assert (TREE_CODE (type) == ARRAY_TYPE);
4963 if (TYPE_DOMAIN (type))
4964 max_index = array_type_nelts (type);
4966 return reshape_init_array_1 (TREE_TYPE (type), max_index, d, complain);
4969 /* Subroutine of reshape_init_r, processes the initializers for vectors.
4970 Parameters are the same of reshape_init_r. */
4973 reshape_init_vector (tree type, reshape_iter *d, tsubst_flags_t complain)
4975 tree max_index = NULL_TREE;
4977 gcc_assert (TREE_CODE (type) == VECTOR_TYPE);
4979 if (COMPOUND_LITERAL_P (d->cur->value))
4981 tree value = d->cur->value;
4982 if (!same_type_p (TREE_TYPE (value), type))
4984 if (complain & tf_error)
4985 error ("invalid type %qT as initializer for a vector of type %qT",
4986 TREE_TYPE (d->cur->value), type);
4987 value = error_mark_node;
4993 /* For a vector, we initialize it as an array of the appropriate size. */
4994 if (TREE_CODE (type) == VECTOR_TYPE)
4995 max_index = size_int (TYPE_VECTOR_SUBPARTS (type) - 1);
4997 return reshape_init_array_1 (TREE_TYPE (type), max_index, d, complain);
5000 /* Subroutine of reshape_init_r, processes the initializers for classes
5001 or union. Parameters are the same of reshape_init_r. */
5004 reshape_init_class (tree type, reshape_iter *d, bool first_initializer_p,
5005 tsubst_flags_t complain)
5010 gcc_assert (CLASS_TYPE_P (type));
5012 /* The initializer for a class is always a CONSTRUCTOR. */
5013 new_init = build_constructor (init_list_type_node, NULL);
5014 field = next_initializable_field (TYPE_FIELDS (type));
5020 An initializer for an aggregate member that is an
5021 empty class shall have the form of an empty
5022 initializer-list {}. */
5023 if (!first_initializer_p)
5025 if (complain & tf_error)
5026 error ("initializer for %qT must be brace-enclosed", type);
5027 return error_mark_node;
5032 /* Loop through the initializable fields, gathering initializers. */
5033 while (d->cur != d->end)
5037 /* Handle designated initializers, as an extension. */
5040 field = lookup_field_1 (type, d->cur->index, /*want_type=*/false);
5042 if (!field || TREE_CODE (field) != FIELD_DECL)
5044 if (complain & tf_error)
5045 error ("%qT has no non-static data member named %qD", type,
5047 return error_mark_node;
5051 /* If we processed all the member of the class, we are done. */
5055 field_init = reshape_init_r (TREE_TYPE (field), d,
5056 /*first_initializer_p=*/false, complain);
5057 if (field_init == error_mark_node)
5058 return error_mark_node;
5060 CONSTRUCTOR_APPEND_ELT (CONSTRUCTOR_ELTS (new_init), field, field_init);
5064 When a union is initialized with a brace-enclosed
5065 initializer, the braces shall only contain an
5066 initializer for the first member of the union. */
5067 if (TREE_CODE (type) == UNION_TYPE)
5070 field = next_initializable_field (DECL_CHAIN (field));
5076 /* Subroutine of reshape_init, which processes a single initializer (part of
5077 a CONSTRUCTOR). TYPE is the type of the variable being initialized, D is the
5078 iterator within the CONSTRUCTOR which points to the initializer to process.
5079 FIRST_INITIALIZER_P is true if this is the first initializer of the
5080 outermost CONSTRUCTOR node. */
5083 reshape_init_r (tree type, reshape_iter *d, bool first_initializer_p,
5084 tsubst_flags_t complain)
5086 tree init = d->cur->value;
5088 if (error_operand_p (init))
5089 return error_mark_node;
5091 if (TREE_CODE (type) == COMPLEX_TYPE)
5093 /* A complex type can be initialized from one or two initializers,
5094 but braces are not elided. */
5096 if (BRACE_ENCLOSED_INITIALIZER_P (init))
5098 if (CONSTRUCTOR_NELTS (init) > 2)
5100 if (complain & tf_error)
5101 error ("too many initializers for %qT", type);
5103 return error_mark_node;
5106 else if (first_initializer_p && d->cur != d->end)
5108 VEC(constructor_elt, gc) *v = 0;
5109 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, init);
5110 CONSTRUCTOR_APPEND_ELT (v, NULL_TREE, d->cur->value);
5112 init = build_constructor (init_list_type_node, v);
5117 /* A non-aggregate type is always initialized with a single
5119 if (!CP_AGGREGATE_TYPE_P (type))
5121 /* It is invalid to initialize a non-aggregate type with a
5122 brace-enclosed initializer before C++0x.
5123 We need to check for BRACE_ENCLOSED_INITIALIZER_P here because
5124 of g++.old-deja/g++.mike/p7626.C: a pointer-to-member constant is
5125 a CONSTRUCTOR (with a record type). */
5126 if (TREE_CODE (init) == CONSTRUCTOR
5127 && BRACE_ENCLOSED_INITIALIZER_P (init)) /* p7626.C */
5129 if (SCALAR_TYPE_P (type))
5131 if (complain & tf_error)
5132 error ("braces around scalar initializer for type %qT", type);
5133 init = error_mark_node;
5136 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
5145 All implicit type conversions (clause _conv_) are considered when
5146 initializing the aggregate member with an initializer from an
5147 initializer-list. If the initializer can initialize a member,
5148 the member is initialized. Otherwise, if the member is itself a
5149 non-empty subaggregate, brace elision is assumed and the
5150 initializer is considered for the initialization of the first
5151 member of the subaggregate. */
5152 if (TREE_CODE (init) != CONSTRUCTOR
5153 /* But don't try this for the first initializer, since that would be
5154 looking through the outermost braces; A a2 = { a1 }; is not a
5155 valid aggregate initialization. */
5156 && !first_initializer_p
5157 && (same_type_ignoring_top_level_qualifiers_p (type, TREE_TYPE (init))
5158 || can_convert_arg (type, TREE_TYPE (init), init, LOOKUP_NORMAL)))
5164 /* [dcl.init.string]
5166 A char array (whether plain char, signed char, or unsigned char)
5167 can be initialized by a string-literal (optionally enclosed in
5168 braces); a wchar_t array can be initialized by a wide
5169 string-literal (optionally enclosed in braces). */
5170 if (TREE_CODE (type) == ARRAY_TYPE
5171 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
5173 tree str_init = init;
5175 /* Strip one level of braces if and only if they enclose a single
5176 element (as allowed by [dcl.init.string]). */
5177 if (!first_initializer_p
5178 && TREE_CODE (str_init) == CONSTRUCTOR
5179 && VEC_length (constructor_elt, CONSTRUCTOR_ELTS (str_init)) == 1)
5181 str_init = VEC_index (constructor_elt,
5182 CONSTRUCTOR_ELTS (str_init), 0)->value;
5185 /* If it's a string literal, then it's the initializer for the array
5186 as a whole. Otherwise, continue with normal initialization for
5187 array types (one value per array element). */
5188 if (TREE_CODE (str_init) == STRING_CST)
5195 /* The following cases are about aggregates. If we are not within a full
5196 initializer already, and there is not a CONSTRUCTOR, it means that there
5197 is a missing set of braces (that is, we are processing the case for
5198 which reshape_init exists). */
5199 if (!first_initializer_p)
5201 if (TREE_CODE (init) == CONSTRUCTOR)
5203 if (TREE_TYPE (init) && TYPE_PTRMEMFUNC_P (TREE_TYPE (init)))
5204 /* There is no need to reshape pointer-to-member function
5205 initializers, as they are always constructed correctly
5206 by the front end. */
5208 else if (COMPOUND_LITERAL_P (init))
5209 /* For a nested compound literal, there is no need to reshape since
5210 brace elision is not allowed. Even if we decided to allow it,
5211 we should add a call to reshape_init in finish_compound_literal,
5212 before calling digest_init, so changing this code would still
5213 not be necessary. */
5214 gcc_assert (!BRACE_ENCLOSED_INITIALIZER_P (init));
5218 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5219 return reshape_init (type, init, complain);
5223 warning (OPT_Wmissing_braces, "missing braces around initializer for %qT",
5227 /* Dispatch to specialized routines. */
5228 if (CLASS_TYPE_P (type))
5229 return reshape_init_class (type, d, first_initializer_p, complain);
5230 else if (TREE_CODE (type) == ARRAY_TYPE)
5231 return reshape_init_array (type, d, complain);
5232 else if (TREE_CODE (type) == VECTOR_TYPE)
5233 return reshape_init_vector (type, d, complain);
5238 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
5239 brace-enclosed aggregate initializer.
5241 INIT is the CONSTRUCTOR containing the list of initializers describing
5242 a brace-enclosed initializer for an entity of the indicated aggregate TYPE.
5243 It may not presently match the shape of the TYPE; for example:
5245 struct S { int a; int b; };
5246 struct S a[] = { 1, 2, 3, 4 };
5248 Here INIT will hold a VEC of four elements, rather than a
5249 VEC of two elements, each itself a VEC of two elements. This
5250 routine transforms INIT from the former form into the latter. The
5251 revised CONSTRUCTOR node is returned. */
5254 reshape_init (tree type, tree init, tsubst_flags_t complain)
5256 VEC(constructor_elt, gc) *v;
5260 gcc_assert (BRACE_ENCLOSED_INITIALIZER_P (init));
5262 v = CONSTRUCTOR_ELTS (init);
5264 /* An empty constructor does not need reshaping, and it is always a valid
5266 if (VEC_empty (constructor_elt, v))
5269 /* Recurse on this CONSTRUCTOR. */
5270 d.cur = VEC_index (constructor_elt, v, 0);
5271 d.end = d.cur + VEC_length (constructor_elt, v);
5273 new_init = reshape_init_r (type, &d, true, complain);
5274 if (new_init == error_mark_node)
5275 return error_mark_node;
5277 /* Make sure all the element of the constructor were used. Otherwise,
5278 issue an error about exceeding initializers. */
5281 if (complain & tf_error)
5282 error ("too many initializers for %qT", type);
5284 return error_mark_node;
5290 /* Verify array initializer. Returns true if errors have been reported. */
5293 check_array_initializer (tree decl, tree type, tree init)
5295 tree element_type = TREE_TYPE (type);
5297 /* The array type itself need not be complete, because the
5298 initializer may tell us how many elements are in the array.
5299 But, the elements of the array must be complete. */
5300 if (!COMPLETE_TYPE_P (complete_type (element_type)))
5303 error ("elements of array %q#D have incomplete type", decl);
5305 error ("elements of array %q#T have incomplete type", type);
5308 /* It is not valid to initialize a VLA. */
5310 && ((COMPLETE_TYPE_P (type) && !TREE_CONSTANT (TYPE_SIZE (type)))
5311 || !TREE_CONSTANT (TYPE_SIZE (element_type))))
5314 error ("variable-sized object %qD may not be initialized", decl);
5316 error ("variable-sized compound literal");
5322 /* Subroutine of check_initializer; args are passed down from that function.
5323 Set stmts_are_full_exprs_p to 1 across a call to build_aggr_init. */
5326 build_aggr_init_full_exprs (tree decl, tree init, int flags)
5329 int saved_stmts_are_full_exprs_p = 0;
5330 if (building_stmt_tree ())
5332 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5333 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5335 init = build_aggr_init (decl, init, flags, tf_warning_or_error);
5336 if (building_stmt_tree ())
5337 current_stmt_tree ()->stmts_are_full_exprs_p =
5338 saved_stmts_are_full_exprs_p;
5342 /* Verify INIT (the initializer for DECL), and record the
5343 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
5344 grok_reference_init.
5346 If the return value is non-NULL, it is an expression that must be
5347 evaluated dynamically to initialize DECL. */
5350 check_initializer (tree decl, tree init, int flags, tree *cleanup)
5352 tree type = TREE_TYPE (decl);
5353 tree init_code = NULL;
5354 tree extra_init = NULL_TREE;
5357 /* Things that are going to be initialized need to have complete
5359 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
5361 if (type == error_mark_node)
5362 /* We will have already complained. */
5365 if (TREE_CODE (type) == ARRAY_TYPE)
5367 if (check_array_initializer (decl, type, init))
5370 else if (!COMPLETE_TYPE_P (type))
5372 error ("%qD has incomplete type", decl);
5373 TREE_TYPE (decl) = error_mark_node;
5377 /* There is no way to make a variable-sized class type in GNU C++. */
5378 gcc_assert (TREE_CONSTANT (TYPE_SIZE (type)));
5380 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5382 int init_len = VEC_length (constructor_elt, CONSTRUCTOR_ELTS (init));
5383 if (SCALAR_TYPE_P (type))
5387 maybe_warn_cpp0x (CPP0X_INITIALIZER_LISTS);
5388 init = build_zero_init (type, NULL_TREE, false);
5390 else if (init_len != 1 && TREE_CODE (type) != COMPLEX_TYPE)
5392 error ("scalar object %qD requires one element in initializer",
5394 TREE_TYPE (decl) = error_mark_node;
5400 if (TREE_CODE (decl) == CONST_DECL)
5402 gcc_assert (TREE_CODE (type) != REFERENCE_TYPE);
5404 DECL_INITIAL (decl) = init;
5406 gcc_assert (init != NULL_TREE);
5409 else if (!init && DECL_REALLY_EXTERN (decl))
5411 else if (TREE_CODE (type) == REFERENCE_TYPE)
5412 init = grok_reference_init (decl, type, init, cleanup);
5413 else if (init || type_build_ctor_call (type))
5416 check_for_uninitialized_const_var (decl);
5417 /* Do not reshape constructors of vectors (they don't need to be
5419 else if (BRACE_ENCLOSED_INITIALIZER_P (init))
5421 if (is_std_init_list (type))
5422 init = build_init_list_var_init (decl, type, init,
5423 &extra_init, cleanup);
5424 else if (TYPE_NON_AGGREGATE_CLASS (type))
5426 /* Don't reshape if the class has constructors. */
5427 if (cxx_dialect == cxx98)
5428 error ("in C++98 %qD must be initialized by constructor, "
5432 else if (TREE_CODE (type) == VECTOR_TYPE && TYPE_VECTOR_OPAQUE (type))
5434 error ("opaque vector types cannot be initialized");
5435 init = error_mark_node;
5438 init = reshape_init (type, init, tf_warning_or_error);
5441 /* If DECL has an array type without a specific bound, deduce the
5442 array size from the initializer. */
5443 maybe_deduce_size_from_array_init (decl, init);
5444 type = TREE_TYPE (decl);
5445 if (type == error_mark_node)
5448 if (type_build_ctor_call (type)
5449 || (CLASS_TYPE_P (type)
5450 && !(init && BRACE_ENCLOSED_INITIALIZER_P (init))))
5452 init_code = build_aggr_init_full_exprs (decl, init, flags);
5454 /* If this is a constexpr initializer, expand_default_init will
5455 have returned an INIT_EXPR rather than a CALL_EXPR. In that
5456 case, pull the initializer back out and pass it down into
5457 store_init_value. */
5458 while (TREE_CODE (init_code) == EXPR_STMT
5459 || TREE_CODE (init_code) == CONVERT_EXPR)
5460 init_code = TREE_OPERAND (init_code, 0);
5461 if (TREE_CODE (init_code) == INIT_EXPR)
5463 init = TREE_OPERAND (init_code, 1);
5464 init_code = NULL_TREE;
5465 /* Don't call digest_init; it's unnecessary and will complain
5466 about aggregate initialization of non-aggregate classes. */
5467 flags |= LOOKUP_ALREADY_DIGESTED;
5469 else if (DECL_DECLARED_CONSTEXPR_P (decl))
5471 /* Declared constexpr, but no suitable initializer; massage
5472 init appropriately so we can pass it into store_init_value
5474 if (init && BRACE_ENCLOSED_INITIALIZER_P (init))
5475 init = finish_compound_literal (type, init,
5476 tf_warning_or_error);
5477 else if (CLASS_TYPE_P (type)
5478 && (!init || TREE_CODE (init) == TREE_LIST))
5480 init = build_functional_cast (type, init, tf_none);
5481 if (init != error_mark_node)
5482 TARGET_EXPR_DIRECT_INIT_P (init) = true;
5484 init_code = NULL_TREE;
5490 if (init && TREE_CODE (init) != TREE_VEC)
5492 init_code = store_init_value (decl, init, flags);
5493 if (pedantic && TREE_CODE (type) == ARRAY_TYPE
5494 && DECL_INITIAL (decl)
5495 && TREE_CODE (DECL_INITIAL (decl)) == STRING_CST
5496 && PAREN_STRING_LITERAL_P (DECL_INITIAL (decl)))
5497 warning (0, "array %qD initialized by parenthesized string literal %qE",
5498 decl, DECL_INITIAL (decl));
5504 if (CLASS_TYPE_P (core_type = strip_array_types (type))
5505 && (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type)
5506 || CLASSTYPE_REF_FIELDS_NEED_INIT (core_type)))
5507 diagnose_uninitialized_cst_or_ref_member (core_type, /*using_new=*/false,
5510 check_for_uninitialized_const_var (decl);
5513 if (init && init != error_mark_node)
5514 init_code = build2 (INIT_EXPR, type, decl, init);
5517 init_code = add_stmt_to_compound (extra_init, init_code);
5519 if (init_code && DECL_IN_AGGR_P (decl))
5521 static int explained = 0;
5523 if (cxx_dialect < cxx0x)
5524 error ("initializer invalid for static member with constructor");
5526 error ("non-constant in-class initialization invalid for static "
5527 "member %qD", decl);
5530 error ("(an out of class initialization is required)");
5538 /* If DECL is not a local variable, give it RTL. */
5541 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
5543 int toplev = toplevel_bindings_p ();
5545 const char *filename;
5547 /* Set the DECL_ASSEMBLER_NAME for the object. */
5550 /* The `register' keyword, when used together with an
5551 asm-specification, indicates that the variable should be
5552 placed in a particular register. */
5553 if (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
5555 set_user_assembler_name (decl, asmspec);
5556 DECL_HARD_REGISTER (decl) = 1;
5560 if (TREE_CODE (decl) == FUNCTION_DECL
5561 && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL)
5562 set_builtin_user_assembler_name (decl, asmspec);
5563 set_user_assembler_name (decl, asmspec);
5567 /* Handle non-variables up front. */
5568 if (TREE_CODE (decl) != VAR_DECL)
5570 rest_of_decl_compilation (decl, toplev, at_eof);
5574 /* If we see a class member here, it should be a static data
5576 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
5578 gcc_assert (TREE_STATIC (decl));
5579 /* An in-class declaration of a static data member should be
5580 external; it is only a declaration, and not a definition. */
5581 if (init == NULL_TREE)
5582 gcc_assert (DECL_EXTERNAL (decl) || !TREE_PUBLIC (decl));
5585 /* We don't create any RTL for local variables. */
5586 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
5589 /* We defer emission of local statics until the corresponding
5590 DECL_EXPR is expanded. */
5591 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
5593 /* We try to defer namespace-scope static constants so that they are
5594 not emitted into the object file unnecessarily. */
5595 filename = input_filename;
5596 if (!DECL_VIRTUAL_P (decl)
5597 && TREE_READONLY (decl)
5598 && DECL_INITIAL (decl) != NULL_TREE
5599 && DECL_INITIAL (decl) != error_mark_node
5601 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
5603 && !TREE_PUBLIC (decl))
5605 /* Fool with the linkage of static consts according to #pragma
5607 struct c_fileinfo *finfo = get_fileinfo (filename);
5608 if (!finfo->interface_unknown && !TREE_PUBLIC (decl))
5610 TREE_PUBLIC (decl) = 1;
5611 DECL_EXTERNAL (decl) = finfo->interface_only;
5616 /* Likewise for template instantiations. */
5617 else if (DECL_LANG_SPECIFIC (decl)
5618 && DECL_IMPLICIT_INSTANTIATION (decl))
5621 /* If we're not deferring, go ahead and assemble the variable. */
5623 rest_of_decl_compilation (decl, toplev, at_eof);
5626 /* walk_tree helper for wrap_temporary_cleanups, below. */
5629 wrap_cleanups_r (tree *stmt_p, int *walk_subtrees, void *data)
5631 if (TYPE_P (*stmt_p))
5637 if (TREE_CODE (*stmt_p) == TARGET_EXPR)
5639 tree guard = (tree)data;
5640 tree tcleanup = TARGET_EXPR_CLEANUP (*stmt_p);
5642 tcleanup = build2 (TRY_CATCH_EXPR, void_type_node, tcleanup, guard);
5643 /* Tell honor_protect_cleanup_actions to handle this as a separate
5645 TRY_CATCH_IS_CLEANUP (tcleanup) = 1;
5647 TARGET_EXPR_CLEANUP (*stmt_p) = tcleanup;
5653 /* We're initializing a local variable which has a cleanup GUARD. If there
5654 are any temporaries used in the initializer INIT of this variable, we
5655 need to wrap their cleanups with TRY_CATCH_EXPR (, GUARD) so that the
5656 variable will be cleaned up properly if one of them throws.
5658 Unfortunately, there's no way to express this properly in terms of
5659 nesting, as the regions for the temporaries overlap the region for the
5660 variable itself; if there are two temporaries, the variable needs to be
5661 the first thing destroyed if either of them throws. However, we only
5662 want to run the variable's cleanup if it actually got constructed. So
5663 we need to guard the temporary cleanups with the variable's cleanup if
5664 they are run on the normal path, but not if they are run on the
5665 exceptional path. We implement this by telling
5666 honor_protect_cleanup_actions to strip the variable cleanup from the
5667 exceptional path. */
5670 wrap_temporary_cleanups (tree init, tree guard)
5672 cp_walk_tree_without_duplicates (&init, wrap_cleanups_r, (void *)guard);
5675 /* Generate code to initialize DECL (a local variable). */
5678 initialize_local_var (tree decl, tree init)
5680 tree type = TREE_TYPE (decl);
5684 gcc_assert (TREE_CODE (decl) == VAR_DECL
5685 || TREE_CODE (decl) == RESULT_DECL);
5686 gcc_assert (!TREE_STATIC (decl));
5688 if (DECL_SIZE (decl) == NULL_TREE)
5690 /* If we used it already as memory, it must stay in memory. */
5691 DECL_INITIAL (decl) = NULL_TREE;
5692 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
5696 if (type == error_mark_node)
5699 /* Compute and store the initial value. */
5700 already_used = TREE_USED (decl) || TREE_USED (type);
5701 if (TREE_USED (type))
5702 DECL_READ_P (decl) = 1;
5704 /* Generate a cleanup, if necessary. */
5705 cleanup = cxx_maybe_build_cleanup (decl, tf_warning_or_error);
5707 /* Perform the initialization. */
5710 if (TREE_CODE (init) == INIT_EXPR
5711 && !TREE_SIDE_EFFECTS (TREE_OPERAND (init, 1)))
5713 /* Stick simple initializers in DECL_INITIAL so that
5714 -Wno-init-self works (c++/34772). */
5715 gcc_assert (TREE_OPERAND (init, 0) == decl);
5716 DECL_INITIAL (decl) = TREE_OPERAND (init, 1);
5720 int saved_stmts_are_full_exprs_p;
5722 /* If we're only initializing a single object, guard the
5723 destructors of any temporaries used in its initializer with
5724 its destructor. This isn't right for arrays because each
5725 element initialization is a full-expression. */
5726 if (cleanup && TREE_CODE (type) != ARRAY_TYPE)
5727 wrap_temporary_cleanups (init, cleanup);
5729 gcc_assert (building_stmt_tree ());
5730 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
5731 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
5732 finish_expr_stmt (init);
5733 current_stmt_tree ()->stmts_are_full_exprs_p =
5734 saved_stmts_are_full_exprs_p;
5738 /* Set this to 0 so we can tell whether an aggregate which was
5739 initialized was ever used. Don't do this if it has a
5740 destructor, so we don't complain about the 'resource
5741 allocation is initialization' idiom. Now set
5742 attribute((unused)) on types so decls of that type will be
5743 marked used. (see TREE_USED, above.) */
5744 if (TYPE_NEEDS_CONSTRUCTING (type)
5746 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
5747 && DECL_NAME (decl))
5748 TREE_USED (decl) = 0;
5749 else if (already_used)
5750 TREE_USED (decl) = 1;
5753 finish_decl_cleanup (decl, cleanup);
5756 /* DECL is a VAR_DECL for a compiler-generated variable with static
5757 storage duration (like a virtual table) whose initializer is a
5758 compile-time constant. Initialize the variable and provide it to the
5762 initialize_artificial_var (tree decl, VEC(constructor_elt,gc) *v)
5765 gcc_assert (DECL_ARTIFICIAL (decl));
5766 init = build_constructor (TREE_TYPE (decl), v);
5767 gcc_assert (TREE_CODE (init) == CONSTRUCTOR);
5768 DECL_INITIAL (decl) = init;
5769 DECL_INITIALIZED_P (decl) = 1;
5770 determine_visibility (decl);
5771 layout_var_decl (decl);
5772 maybe_commonize_var (decl);
5773 make_rtl_for_nonlocal_decl (decl, init, /*asmspec=*/NULL);
5776 /* INIT is the initializer for a variable, as represented by the
5777 parser. Returns true iff INIT is type-dependent. */
5780 type_dependent_init_p (tree init)
5782 if (TREE_CODE (init) == TREE_LIST)
5783 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5784 return any_type_dependent_elements_p (init);
5785 else if (TREE_CODE (init) == CONSTRUCTOR)
5786 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5788 VEC(constructor_elt, gc) *elts;
5792 elts = CONSTRUCTOR_ELTS (init);
5793 nelts = VEC_length (constructor_elt, elts);
5794 for (i = 0; i < nelts; ++i)
5795 if (type_dependent_init_p (VEC_index (constructor_elt,
5800 /* It must be a simple expression, e.g., int i = 3; */
5801 return type_dependent_expression_p (init);
5806 /* INIT is the initializer for a variable, as represented by the
5807 parser. Returns true iff INIT is value-dependent. */
5810 value_dependent_init_p (tree init)
5812 if (TREE_CODE (init) == TREE_LIST)
5813 /* A parenthesized initializer, e.g.: int i (3, 2); ? */
5814 return any_value_dependent_elements_p (init);
5815 else if (TREE_CODE (init) == CONSTRUCTOR)
5816 /* A brace-enclosed initializer, e.g.: int i = { 3 }; ? */
5818 VEC(constructor_elt, gc) *elts;
5822 elts = CONSTRUCTOR_ELTS (init);
5823 nelts = VEC_length (constructor_elt, elts);
5824 for (i = 0; i < nelts; ++i)
5825 if (value_dependent_init_p (VEC_index (constructor_elt,
5830 /* It must be a simple expression, e.g., int i = 3; */
5831 return value_dependent_expression_p (init);
5836 /* Finish processing of a declaration;
5837 install its line number and initial value.
5838 If the length of an array type is not known before,
5839 it must be determined now, from the initial value, or it is an error.
5841 INIT is the initializer (if any) for DECL. If INIT_CONST_EXPR_P is
5842 true, then INIT is an integral constant expression.
5844 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
5845 if the (init) syntax was used. */
5848 cp_finish_decl (tree decl, tree init, bool init_const_expr_p,
5849 tree asmspec_tree, int flags)
5853 const char *asmspec = NULL;
5854 int was_readonly = 0;
5855 bool var_definition_p = false;
5858 if (decl == error_mark_node)
5863 error ("assignment (not initialization) in declaration");
5867 gcc_assert (TREE_CODE (decl) != RESULT_DECL);
5868 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
5869 gcc_assert (TREE_CODE (decl) != PARM_DECL);
5871 type = TREE_TYPE (decl);
5872 if (type == error_mark_node)
5875 /* Assume no cleanup is required. */
5876 cleanup = NULL_TREE;
5878 /* If a name was specified, get the string. */
5879 if (global_scope_p (current_binding_level))
5880 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
5881 if (asmspec_tree && asmspec_tree != error_mark_node)
5882 asmspec = TREE_STRING_POINTER (asmspec_tree);
5884 if (current_class_type
5885 && CP_DECL_CONTEXT (decl) == current_class_type
5886 && TYPE_BEING_DEFINED (current_class_type)
5887 && (DECL_INITIAL (decl) || init))
5888 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
5890 auto_node = type_uses_auto (type);
5894 if (init == NULL_TREE)
5896 error ("declaration of %q#D has no initializer", decl);
5897 TREE_TYPE (decl) = error_mark_node;
5901 if (TREE_CODE (d_init) == TREE_LIST)
5902 d_init = build_x_compound_expr_from_list (d_init, ELK_INIT,
5903 tf_warning_or_error);
5904 d_init = resolve_nondeduced_context (d_init);
5905 if (describable_type (d_init))
5907 type = TREE_TYPE (decl) = do_auto_deduction (type, d_init,
5909 if (type == error_mark_node)
5914 if (!ensure_literal_type_for_constexpr_object (decl))
5915 DECL_DECLARED_CONSTEXPR_P (decl) = 0;
5917 if (init && TREE_CODE (decl) == FUNCTION_DECL)
5920 if (init == ridpointers[(int)RID_DELETE])
5922 /* FIXME check this is 1st decl. */
5923 DECL_DELETED_FN (decl) = 1;
5924 DECL_DECLARED_INLINE_P (decl) = 1;
5925 DECL_INITIAL (decl) = error_mark_node;
5926 FOR_EACH_CLONE (clone, decl)
5928 DECL_DELETED_FN (clone) = 1;
5929 DECL_DECLARED_INLINE_P (clone) = 1;
5930 DECL_INITIAL (clone) = error_mark_node;
5934 else if (init == ridpointers[(int)RID_DEFAULT])
5936 if (defaultable_fn_check (decl))
5937 DECL_DEFAULTED_FN (decl) = 1;
5939 DECL_INITIAL (decl) = NULL_TREE;
5943 if (init && TREE_CODE (decl) == VAR_DECL)
5945 DECL_NONTRIVIALLY_INITIALIZED_P (decl) = 1;
5946 if (init_const_expr_p)
5948 /* Set these flags now for templates. We'll update the flags in
5949 store_init_value for instantiations. */
5950 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (decl) = 1;
5951 if (decl_maybe_constant_var_p (decl))
5952 TREE_CONSTANT (decl) = 1;
5956 if (processing_template_decl)
5958 bool type_dependent_p;
5960 /* Add this declaration to the statement-tree. */
5961 if (at_function_scope_p ())
5962 add_decl_expr (decl);
5964 type_dependent_p = dependent_type_p (type);
5966 if (check_for_bare_parameter_packs (init))
5969 DECL_INITIAL (decl) = NULL_TREE;
5972 /* Generally, initializers in templates are expanded when the
5973 template is instantiated. But, if DECL is a variable constant
5974 then it can be used in future constant expressions, so its value
5975 must be available. */
5977 if (TREE_CODE (decl) != VAR_DECL || dependent_type_p (type))
5978 /* We can't do anything if the decl has dependent type. */;
5980 && init_const_expr_p
5981 && !type_dependent_p
5982 && decl_maybe_constant_var_p (decl)
5983 && !type_dependent_init_p (init)
5984 && !value_dependent_init_p (init))
5986 /* This variable seems to be a non-dependent constant, so process
5987 its initializer. If check_initializer returns non-null the
5988 initialization wasn't constant after all. */
5989 tree init_code = check_initializer (decl, init, flags, &cleanup);
5990 if (init_code == NULL_TREE)
5993 else if (!DECL_PRETTY_FUNCTION_P (decl))
5994 /* Deduce array size even if the initializer is dependent. */
5995 maybe_deduce_size_from_array_init (decl, init);
5998 DECL_INITIAL (decl) = init;
6002 /* Take care of TYPE_DECLs up front. */
6003 if (TREE_CODE (decl) == TYPE_DECL)
6005 if (type != error_mark_node
6006 && MAYBE_CLASS_TYPE_P (type) && DECL_NAME (decl))
6008 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
6009 warning (0, "shadowing previous type declaration of %q#D", decl);
6010 set_identifier_type_value (DECL_NAME (decl), decl);
6013 /* If we have installed this as the canonical typedef for this
6014 type, and that type has not been defined yet, delay emitting
6015 the debug information for it, as we will emit it later. */
6016 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
6017 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
6018 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
6020 rest_of_decl_compilation (decl, DECL_FILE_SCOPE_P (decl),
6025 /* A reference will be modified here, as it is initialized. */
6026 if (! DECL_EXTERNAL (decl)
6027 && TREE_READONLY (decl)
6028 && TREE_CODE (type) == REFERENCE_TYPE)
6031 TREE_READONLY (decl) = 0;
6034 if (TREE_CODE (decl) == VAR_DECL)
6036 /* Only variables with trivial initialization and destruction can
6037 have thread-local storage. */
6038 if (DECL_THREAD_LOCAL_P (decl)
6039 && (type_has_nontrivial_default_init (TREE_TYPE (decl))
6040 || TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
6041 error ("%qD cannot be thread-local because it has non-trivial "
6042 "type %qT", decl, TREE_TYPE (decl));
6043 /* If this is a local variable that will need a mangled name,
6044 register it now. We must do this before processing the
6045 initializer for the variable, since the initialization might
6046 require a guard variable, and since the mangled name of the
6047 guard variable will depend on the mangled name of this
6049 if (DECL_FUNCTION_SCOPE_P (decl)
6050 && TREE_STATIC (decl)
6051 && !DECL_ARTIFICIAL (decl))
6053 push_local_name (decl);
6054 if (DECL_CONSTRUCTOR_P (current_function_decl)
6055 || DECL_DESTRUCTOR_P (current_function_decl))
6056 /* Normally local_decls is populated during GIMPLE lowering,
6057 but [cd]tors are never actually compiled directly. We need
6058 to put statics on the list so we can deal with the label
6059 address extension. */
6060 add_local_decl (cfun, decl);
6063 /* Convert the initializer to the type of DECL, if we have not
6064 already initialized DECL. */
6065 if (!DECL_INITIALIZED_P (decl)
6066 /* If !DECL_EXTERNAL then DECL is being defined. In the
6067 case of a static data member initialized inside the
6068 class-specifier, there can be an initializer even if DECL
6069 is *not* defined. */
6070 && (!DECL_EXTERNAL (decl) || init))
6072 if (TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
6075 = IDENTIFIER_GLOBAL_VALUE (get_identifier ("jclass"));
6076 /* Allow libjava/prims.cc define primitive classes. */
6077 if (init != NULL_TREE
6078 || jclass == NULL_TREE
6079 || TREE_CODE (jclass) != TYPE_DECL
6080 || !POINTER_TYPE_P (TREE_TYPE (jclass))
6081 || !same_type_ignoring_top_level_qualifiers_p
6082 (type, TREE_TYPE (TREE_TYPE (jclass))))
6083 error ("Java object %qD not allocated with %<new%>", decl);
6086 init = check_initializer (decl, init, flags, &cleanup);
6087 /* Thread-local storage cannot be dynamically initialized. */
6088 if (DECL_THREAD_LOCAL_P (decl) && init)
6090 error ("%qD is thread-local and so cannot be dynamically "
6091 "initialized", decl);
6095 /* Check that the initializer for a static data member was a
6096 constant. Although we check in the parser that the
6097 initializer is an integral constant expression, we do not
6098 simplify division-by-zero at the point at which it
6099 occurs. Therefore, in:
6101 struct S { static const int i = 7 / 0; };
6103 we issue an error at this point. It would
6104 probably be better to forbid division by zero in
6105 integral constant expressions. */
6106 if (DECL_EXTERNAL (decl) && init)
6108 error ("%qD cannot be initialized by a non-constant expression"
6109 " when being declared", decl);
6110 DECL_INITIALIZED_IN_CLASS_P (decl) = 0;
6118 The memory occupied by any object of static storage
6119 duration is zero-initialized at program startup before
6120 any other initialization takes place.
6122 We cannot create an appropriate initializer until after
6123 the type of DECL is finalized. If DECL_INITIAL is set,
6124 then the DECL is statically initialized, and any
6125 necessary zero-initialization has already been performed. */
6126 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
6127 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
6128 /*nelts=*/NULL_TREE,
6129 /*static_storage_p=*/true);
6130 /* Remember that the initialization for this variable has
6132 DECL_INITIALIZED_P (decl) = 1;
6133 /* This declaration is the definition of this variable,
6134 unless we are initializing a static data member within
6135 the class specifier. */
6136 if (!DECL_EXTERNAL (decl))
6137 var_definition_p = true;
6139 /* If the variable has an array type, lay out the type, even if
6140 there is no initializer. It is valid to index through the
6141 array, and we must get TYPE_ALIGN set correctly on the array
6143 else if (TREE_CODE (type) == ARRAY_TYPE)
6146 if (TREE_STATIC (decl)
6147 && !at_function_scope_p ()
6148 && current_function_decl == NULL)
6149 /* So decl is a global variable or a static member of a
6150 non local class. Record the types it uses
6151 so that we can decide later to emit debug info for them. */
6152 record_types_used_by_current_var_decl (decl);
6154 else if (TREE_CODE (decl) == FIELD_DECL
6155 && TYPE_FOR_JAVA (type) && MAYBE_CLASS_TYPE_P (type))
6156 error ("non-static data member %qD has Java class type", decl);
6158 /* Add this declaration to the statement-tree. This needs to happen
6159 after the call to check_initializer so that the DECL_EXPR for a
6160 reference temp is added before the DECL_EXPR for the reference itself. */
6161 if (at_function_scope_p ())
6162 add_decl_expr (decl);
6164 /* Let the middle end know about variables and functions -- but not
6165 static data members in uninstantiated class templates. */
6166 if (TREE_CODE (decl) == VAR_DECL
6167 || TREE_CODE (decl) == FUNCTION_DECL)
6169 if (TREE_CODE (decl) == VAR_DECL)
6171 layout_var_decl (decl);
6172 maybe_commonize_var (decl);
6175 /* This needs to happen after the linkage is set. */
6176 determine_visibility (decl);
6178 if (var_definition_p && TREE_STATIC (decl))
6180 /* If a TREE_READONLY variable needs initialization
6181 at runtime, it is no longer readonly and we need to
6182 avoid MEM_READONLY_P being set on RTL created for it. */
6185 if (TREE_READONLY (decl))
6186 TREE_READONLY (decl) = 0;
6189 else if (was_readonly)
6190 TREE_READONLY (decl) = 1;
6193 make_rtl_for_nonlocal_decl (decl, init, asmspec);
6195 /* Check for abstractness of the type. Notice that there is no
6196 need to strip array types here since the check for those types
6197 is already done within create_array_type_for_decl. */
6198 if (TREE_CODE (type) == FUNCTION_TYPE
6199 || TREE_CODE (type) == METHOD_TYPE)
6200 abstract_virtuals_error (decl, TREE_TYPE (type));
6202 abstract_virtuals_error (decl, type);
6204 if (TREE_TYPE (decl) == error_mark_node)
6205 /* No initialization required. */
6207 else if (TREE_CODE (decl) == FUNCTION_DECL)
6211 if (init == ridpointers[(int)RID_DEFAULT])
6213 /* An out-of-class default definition is defined at
6214 the point where it is explicitly defaulted. */
6215 if (DECL_DELETED_FN (decl))
6216 maybe_explain_implicit_delete (decl);
6217 else if (DECL_INITIAL (decl) == error_mark_node)
6218 synthesize_method (decl);
6221 error ("function %q#D is initialized like a variable", decl);
6223 /* else no initialization required. */
6225 else if (DECL_EXTERNAL (decl)
6226 && ! (DECL_LANG_SPECIFIC (decl)
6227 && DECL_NOT_REALLY_EXTERN (decl)))
6230 DECL_INITIAL (decl) = init;
6232 /* A variable definition. */
6233 else if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
6234 /* Initialize the local variable. */
6235 initialize_local_var (decl, init);
6237 /* If a variable is defined, and then a subsequent
6238 definition with external linkage is encountered, we will
6239 get here twice for the same variable. We want to avoid
6240 calling expand_static_init more than once. For variables
6241 that are not static data members, we can call
6242 expand_static_init only when we actually process the
6243 initializer. It is not legal to redeclare a static data
6244 member, so this issue does not arise in that case. */
6245 else if (var_definition_p && TREE_STATIC (decl))
6246 expand_static_init (decl, init);
6249 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
6250 reference, insert it in the statement-tree now. */
6252 push_cleanup (decl, cleanup, false);
6255 TREE_READONLY (decl) = 1;
6258 /* Returns a declaration for a VAR_DECL as if:
6260 extern "C" TYPE NAME;
6262 had been seen. Used to create compiler-generated global
6266 declare_global_var (tree name, tree type)
6270 push_to_top_level ();
6271 decl = build_decl (input_location, VAR_DECL, name, type);
6272 TREE_PUBLIC (decl) = 1;
6273 DECL_EXTERNAL (decl) = 1;
6274 DECL_ARTIFICIAL (decl) = 1;
6275 /* If the user has explicitly declared this variable (perhaps
6276 because the code we are compiling is part of a low-level runtime
6277 library), then it is possible that our declaration will be merged
6278 with theirs by pushdecl. */
6279 decl = pushdecl (decl);
6280 cp_finish_decl (decl, NULL_TREE, false, NULL_TREE, 0);
6281 pop_from_top_level ();
6286 /* Returns the type for the argument to "__cxa_atexit" (or "atexit",
6287 if "__cxa_atexit" is not being used) corresponding to the function
6288 to be called when the program exits. */
6291 get_atexit_fn_ptr_type (void)
6295 if (!atexit_fn_ptr_type_node)
6298 if (flag_use_cxa_atexit
6299 && !targetm.cxx.use_atexit_for_cxa_atexit ())
6300 /* The parameter to "__cxa_atexit" is "void (*)(void *)". */
6301 arg_type = ptr_type_node;
6303 /* The parameter to "atexit" is "void (*)(void)". */
6304 arg_type = NULL_TREE;
6306 fn_type = build_function_type_list (void_type_node,
6307 arg_type, NULL_TREE);
6308 atexit_fn_ptr_type_node = build_pointer_type (fn_type);
6311 return atexit_fn_ptr_type_node;
6314 /* Returns a pointer to the `atexit' function. Note that if
6315 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
6316 `__cxa_atexit' function specified in the IA64 C++ ABI. */
6319 get_atexit_node (void)
6325 bool use_aeabi_atexit;
6330 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6332 /* The declaration for `__cxa_atexit' is:
6334 int __cxa_atexit (void (*)(void *), void *, void *)
6336 We build up the argument types and then the function type
6338 tree argtype0, argtype1, argtype2;
6340 use_aeabi_atexit = targetm.cxx.use_aeabi_atexit ();
6341 /* First, build the pointer-to-function type for the first
6343 fn_ptr_type = get_atexit_fn_ptr_type ();
6344 /* Then, build the rest of the argument types. */
6345 argtype2 = ptr_type_node;
6346 if (use_aeabi_atexit)
6348 argtype1 = fn_ptr_type;
6349 argtype0 = ptr_type_node;
6353 argtype1 = ptr_type_node;
6354 argtype0 = fn_ptr_type;
6356 /* And the final __cxa_atexit type. */
6357 fn_type = build_function_type_list (integer_type_node,
6358 argtype0, argtype1, argtype2,
6360 fn_ptr_type = build_pointer_type (fn_type);
6361 if (use_aeabi_atexit)
6362 name = "__aeabi_atexit";
6364 name = "__cxa_atexit";
6368 /* The declaration for `atexit' is:
6370 int atexit (void (*)());
6372 We build up the argument types and then the function type
6374 fn_ptr_type = get_atexit_fn_ptr_type ();
6375 /* Build the final atexit type. */
6376 fn_type = build_function_type_list (integer_type_node,
6377 fn_ptr_type, NULL_TREE);
6381 /* Now, build the function declaration. */
6382 push_lang_context (lang_name_c);
6383 atexit_fndecl = build_library_fn_ptr (name, fn_type);
6384 mark_used (atexit_fndecl);
6385 pop_lang_context ();
6386 atexit_node = decay_conversion (atexit_fndecl);
6391 /* Returns the __dso_handle VAR_DECL. */
6394 get_dso_handle_node (void)
6396 if (dso_handle_node)
6397 return dso_handle_node;
6399 /* Declare the variable. */
6400 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
6403 return dso_handle_node;
6406 /* Begin a new function with internal linkage whose job will be simply
6407 to destroy some particular variable. */
6409 static GTY(()) int start_cleanup_cnt;
6412 start_cleanup_fn (void)
6417 bool use_cxa_atexit = flag_use_cxa_atexit
6418 && !targetm.cxx.use_atexit_for_cxa_atexit ();
6420 push_to_top_level ();
6422 /* No need to mangle this. */
6423 push_lang_context (lang_name_c);
6425 /* Build the name of the function. */
6426 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
6427 /* Build the function declaration. */
6428 fntype = TREE_TYPE (get_atexit_fn_ptr_type ());
6429 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
6430 /* It's a function with internal linkage, generated by the
6432 TREE_PUBLIC (fndecl) = 0;
6433 DECL_ARTIFICIAL (fndecl) = 1;
6434 /* Make the function `inline' so that it is only emitted if it is
6435 actually needed. It is unlikely that it will be inlined, since
6436 it is only called via a function pointer, but we avoid unnecessary
6437 emissions this way. */
6438 DECL_DECLARED_INLINE_P (fndecl) = 1;
6439 DECL_INTERFACE_KNOWN (fndecl) = 1;
6440 /* Build the parameter. */
6445 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
6446 DECL_CONTEXT (parmdecl) = fndecl;
6447 TREE_USED (parmdecl) = 1;
6448 DECL_READ_P (parmdecl) = 1;
6449 DECL_ARGUMENTS (fndecl) = parmdecl;
6453 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
6455 pop_lang_context ();
6457 return current_function_decl;
6460 /* Finish the cleanup function begun by start_cleanup_fn. */
6463 end_cleanup_fn (void)
6465 expand_or_defer_fn (finish_function (0));
6467 pop_from_top_level ();
6470 /* Generate code to handle the destruction of DECL, an object with
6471 static storage duration. */
6474 register_dtor_fn (tree decl)
6481 tree arg0, arg1 = NULL_TREE, arg2 = NULL_TREE;
6483 type = TREE_TYPE (decl);
6484 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (type))
6485 return void_zero_node;
6487 /* If we're using "__cxa_atexit" (or "__aeabi_atexit"), and DECL is
6488 a class object, we can just pass the destructor to
6489 "__cxa_atexit"; we don't have to build a temporary function to do
6491 use_dtor = (flag_use_cxa_atexit
6492 && !targetm.cxx.use_atexit_for_cxa_atexit ()
6493 && CLASS_TYPE_P (type));
6498 /* Find the destructor. */
6499 idx = lookup_fnfields_1 (type, complete_dtor_identifier);
6500 gcc_assert (idx >= 0);
6501 cleanup = VEC_index (tree, CLASSTYPE_METHOD_VEC (type), idx);
6502 /* Make sure it is accessible. */
6503 perform_or_defer_access_check (TYPE_BINFO (type), cleanup, cleanup);
6507 /* Call build_cleanup before we enter the anonymous function so
6508 that any access checks will be done relative to the current
6509 scope, rather than the scope of the anonymous function. */
6510 build_cleanup (decl);
6512 /* Now start the function. */
6513 cleanup = start_cleanup_fn ();
6515 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
6516 to the original function, rather than the anonymous one. That
6517 will make the back end think that nested functions are in use,
6518 which causes confusion. */
6519 push_deferring_access_checks (dk_no_check);
6520 fcall = build_cleanup (decl);
6521 pop_deferring_access_checks ();
6523 /* Create the body of the anonymous function. */
6524 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
6525 finish_expr_stmt (fcall);
6526 finish_compound_stmt (compound_stmt);
6530 /* Call atexit with the cleanup function. */
6531 mark_used (cleanup);
6532 cleanup = build_address (cleanup);
6533 if (flag_use_cxa_atexit && !targetm.cxx.use_atexit_for_cxa_atexit ())
6539 /* We must convert CLEANUP to the type that "__cxa_atexit"
6541 cleanup = build_nop (get_atexit_fn_ptr_type (), cleanup);
6542 /* "__cxa_atexit" will pass the address of DECL to the
6543 cleanup function. */
6545 addr = build_address (decl);
6546 /* The declared type of the parameter to "__cxa_atexit" is
6547 "void *". For plain "T*", we could just let the
6548 machinery in cp_build_function_call convert it -- but if the
6549 type is "cv-qualified T *", then we need to convert it
6550 before passing it in, to avoid spurious errors. */
6551 addr = build_nop (ptr_type_node, addr);
6554 /* Since the cleanup functions we build ignore the address
6555 they're given, there's no reason to pass the actual address
6556 in, and, in general, it's cheaper to pass NULL than any
6558 addr = null_pointer_node;
6559 arg2 = cp_build_addr_expr (get_dso_handle_node (),
6560 tf_warning_or_error);
6561 if (targetm.cxx.use_aeabi_atexit ())
6574 return cp_build_function_call_nary (get_atexit_node (), tf_warning_or_error,
6575 arg0, arg1, arg2, NULL_TREE);
6578 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
6579 is its initializer. Generate code to handle the construction
6580 and destruction of DECL. */
6583 expand_static_init (tree decl, tree init)
6585 gcc_assert (TREE_CODE (decl) == VAR_DECL);
6586 gcc_assert (TREE_STATIC (decl));
6588 /* Some variables require no dynamic initialization. */
6590 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
6593 if (DECL_FUNCTION_SCOPE_P (decl))
6595 /* Emit code to perform this initialization but once. */
6596 tree if_stmt = NULL_TREE, inner_if_stmt = NULL_TREE;
6597 tree then_clause = NULL_TREE, inner_then_clause = NULL_TREE;
6598 tree guard, guard_addr;
6599 tree acquire_fn, release_fn, abort_fn;
6602 /* Emit code to perform this initialization but once. This code
6605 static <type> guard;
6606 if (!guard.first_byte) {
6607 if (__cxa_guard_acquire (&guard)) {
6610 // Do initialization.
6611 flag = true; __cxa_guard_release (&guard);
6612 // Register variable for destruction at end of program.
6614 if (!flag) __cxa_guard_abort (&guard);
6618 Note that the `flag' variable is only set to 1 *after* the
6619 initialization is complete. This ensures that an exception,
6620 thrown during the construction, will cause the variable to
6621 reinitialized when we pass through this code again, as per:
6625 If the initialization exits by throwing an exception, the
6626 initialization is not complete, so it will be tried again
6627 the next time control enters the declaration.
6629 This process should be thread-safe, too; multiple threads
6630 should not be able to initialize the variable more than
6633 /* Create the guard variable. */
6634 guard = get_guard (decl);
6636 /* This optimization isn't safe on targets with relaxed memory
6637 consistency. On such targets we force synchronization in
6638 __cxa_guard_acquire. */
6639 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6641 /* Begin the conditional initialization. */
6642 if_stmt = begin_if_stmt ();
6643 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
6644 then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6647 if (flag_threadsafe_statics)
6649 guard_addr = build_address (guard);
6651 acquire_fn = get_identifier ("__cxa_guard_acquire");
6652 release_fn = get_identifier ("__cxa_guard_release");
6653 abort_fn = get_identifier ("__cxa_guard_abort");
6654 if (!get_global_value_if_present (acquire_fn, &acquire_fn))
6656 tree vfntype = build_function_type_list (void_type_node,
6657 TREE_TYPE (guard_addr),
6659 acquire_fn = push_library_fn
6660 (acquire_fn, build_function_type_list (integer_type_node,
6661 TREE_TYPE (guard_addr),
6664 release_fn = push_library_fn (release_fn, vfntype, NULL_TREE);
6665 abort_fn = push_library_fn (abort_fn, vfntype, NULL_TREE);
6669 release_fn = identifier_global_value (release_fn);
6670 abort_fn = identifier_global_value (abort_fn);
6673 inner_if_stmt = begin_if_stmt ();
6674 finish_if_stmt_cond (build_call_n (acquire_fn, 1, guard_addr),
6677 inner_then_clause = begin_compound_stmt (BCS_NO_SCOPE);
6678 begin = get_target_expr (boolean_false_node);
6679 flag = TARGET_EXPR_SLOT (begin);
6681 TARGET_EXPR_CLEANUP (begin)
6682 = build3 (COND_EXPR, void_type_node, flag,
6684 build_call_n (abort_fn, 1, guard_addr));
6685 CLEANUP_EH_ONLY (begin) = 1;
6687 /* Do the initialization itself. */
6688 init = add_stmt_to_compound (begin, init);
6689 init = add_stmt_to_compound
6690 (init, build2 (MODIFY_EXPR, void_type_node, flag, boolean_true_node));
6691 init = add_stmt_to_compound
6692 (init, build_call_n (release_fn, 1, guard_addr));
6695 init = add_stmt_to_compound (init, set_guard (guard));
6697 /* Use atexit to register a function for destroying this static
6699 init = add_stmt_to_compound (init, register_dtor_fn (decl));
6701 finish_expr_stmt (init);
6703 if (flag_threadsafe_statics)
6705 finish_compound_stmt (inner_then_clause);
6706 finish_then_clause (inner_if_stmt);
6707 finish_if_stmt (inner_if_stmt);
6710 if (!targetm.relaxed_ordering || !flag_threadsafe_statics)
6712 finish_compound_stmt (then_clause);
6713 finish_then_clause (if_stmt);
6714 finish_if_stmt (if_stmt);
6718 static_aggregates = tree_cons (init, decl, static_aggregates);
6722 /* Make TYPE a complete type based on INITIAL_VALUE.
6723 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
6724 2 if there was no information (in which case assume 0 if DO_DEFAULT),
6725 3 if the initializer list is empty (in pedantic mode). */
6728 cp_complete_array_type (tree *ptype, tree initial_value, bool do_default)
6731 tree type, elt_type;
6735 unsigned HOST_WIDE_INT i;
6738 /* An array of character type can be initialized from a
6739 brace-enclosed string constant.
6741 FIXME: this code is duplicated from reshape_init. Probably
6742 we should just call reshape_init here? */
6743 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (*ptype)))
6744 && TREE_CODE (initial_value) == CONSTRUCTOR
6745 && !VEC_empty (constructor_elt, CONSTRUCTOR_ELTS (initial_value)))
6747 VEC(constructor_elt,gc) *v = CONSTRUCTOR_ELTS (initial_value);
6748 tree value = VEC_index (constructor_elt, v, 0)->value;
6750 if (TREE_CODE (value) == STRING_CST
6751 && VEC_length (constructor_elt, v) == 1)
6752 initial_value = value;
6755 /* If any of the elements are parameter packs, we can't actually
6756 complete this type now because the array size is dependent. */
6757 if (TREE_CODE (initial_value) == CONSTRUCTOR)
6759 FOR_EACH_CONSTRUCTOR_VALUE (CONSTRUCTOR_ELTS (initial_value),
6762 if (PACK_EXPANSION_P (value))
6768 failure = complete_array_type (ptype, initial_value, do_default);
6770 /* We can create the array before the element type is complete, which
6771 means that we didn't have these two bits set in the original type
6772 either. In completing the type, we are expected to propagate these
6773 bits. See also complete_type which does the same thing for arrays
6776 if (TYPE_DOMAIN (type))
6778 elt_type = TREE_TYPE (type);
6779 TYPE_NEEDS_CONSTRUCTING (type) = TYPE_NEEDS_CONSTRUCTING (elt_type);
6780 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
6781 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (elt_type);
6787 /* As above, but either give an error or reject zero-size arrays, depending
6791 cp_complete_array_type_or_error (tree *ptype, tree initial_value,
6792 bool do_default, tsubst_flags_t complain)
6795 bool sfinae = !(complain & tf_error);
6796 /* In SFINAE context we can't be lenient about zero-size arrays. */
6799 failure = cp_complete_array_type (ptype, initial_value, do_default);
6805 /* Not an error. */;
6806 else if (failure == 1)
6807 error ("initializer fails to determine size of %qT", *ptype);
6808 else if (failure == 2)
6811 error ("array size missing in %qT", *ptype);
6813 else if (failure == 3)
6814 error ("zero-size array %qT", *ptype);
6815 *ptype = error_mark_node;
6820 /* Return zero if something is declared to be a member of type
6821 CTYPE when in the context of CUR_TYPE. STRING is the error
6822 message to print in that case. Otherwise, quietly return 1. */
6825 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
6827 if (ctype && ctype != cur_type)
6829 if (flags == DTOR_FLAG)
6830 error ("destructor for alien class %qT cannot be a member", ctype);
6832 error ("constructor for alien class %qT cannot be a member", ctype);
6838 /* Subroutine of `grokdeclarator'. */
6840 /* Generate errors possibly applicable for a given set of specifiers.
6841 This is for ARM $7.1.2. */
6844 bad_specifiers (tree object,
6845 enum bad_spec_place type,
6856 error ("%qD declared as a %<virtual%> variable", object);
6858 error ("%qD declared as an %<inline%> variable", object);
6860 error ("%<const%> and %<volatile%> function specifiers on "
6861 "%qD invalid in variable declaration", object);
6865 error ("%qD declared as a %<virtual%> parameter", object);
6867 error ("%qD declared as an %<inline%> parameter", object);
6869 error ("%<const%> and %<volatile%> function specifiers on "
6870 "%qD invalid in parameter declaration", object);
6874 error ("%qD declared as a %<virtual%> type", object);
6876 error ("%qD declared as an %<inline%> type", object);
6878 error ("%<const%> and %<volatile%> function specifiers on "
6879 "%qD invalid in type declaration", object);
6883 error ("%qD declared as a %<virtual%> field", object);
6885 error ("%qD declared as an %<inline%> field", object);
6887 error ("%<const%> and %<volatile%> function specifiers on "
6888 "%qD invalid in field declaration", object);
6894 error ("%q+D declared as a friend", object);
6896 && (TREE_CODE (object) == TYPE_DECL
6897 || (!TYPE_PTRFN_P (TREE_TYPE (object))
6898 && !TYPE_REFFN_P (TREE_TYPE (object))
6899 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
6900 error ("%q+D declared with an exception specification", object);
6903 /* DECL is a member function or static data member and is presently
6904 being defined. Check that the definition is taking place in a
6908 check_class_member_definition_namespace (tree decl)
6910 /* These checks only apply to member functions and static data
6912 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
6913 || TREE_CODE (decl) == VAR_DECL);
6914 /* We check for problems with specializations in pt.c in
6915 check_specialization_namespace, where we can issue better
6917 if (processing_specialization)
6919 /* There are no restrictions on the placement of
6920 explicit instantiations. */
6921 if (processing_explicit_instantiation)
6925 A member function definition that appears outside of the
6926 class definition shall appear in a namespace scope enclosing
6927 the class definition.
6931 The definition for a static data member shall appear in a
6932 namespace scope enclosing the member's class definition. */
6933 if (!is_ancestor (current_namespace, DECL_CONTEXT (decl)))
6934 permerror (input_location, "definition of %qD is not in namespace enclosing %qT",
6935 decl, DECL_CONTEXT (decl));
6938 /* Build a PARM_DECL for the "this" parameter. TYPE is the
6939 METHOD_TYPE for a non-static member function; QUALS are the
6940 cv-qualifiers that apply to the function. */
6943 build_this_parm (tree type, cp_cv_quals quals)
6948 cp_cv_quals this_quals;
6950 this_type = type_of_this_parm (type);
6951 /* The `this' parameter is implicitly `const'; it cannot be
6953 this_quals = (quals & TYPE_QUAL_RESTRICT) | TYPE_QUAL_CONST;
6954 qual_type = cp_build_qualified_type (this_type, this_quals);
6955 parm = build_artificial_parm (this_identifier, qual_type);
6956 cp_apply_type_quals_to_decl (this_quals, parm);
6960 /* CTYPE is class type, or null if non-class.
6961 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
6963 DECLARATOR is the function's name.
6964 PARMS is a chain of PARM_DECLs for the function.
6965 VIRTUALP is truthvalue of whether the function is virtual or not.
6966 FLAGS are to be passed through to `grokclassfn'.
6967 QUALS are qualifiers indicating whether the function is `const'
6969 RAISES is a list of exceptions that this function can raise.
6970 CHECK is 1 if we must find this method in CTYPE, 0 if we should
6971 not look, and -1 if we should not call `grokclassfn' at all.
6973 SFK is the kind of special function (if any) for the new function.
6975 Returns `NULL_TREE' if something goes wrong, after issuing
6976 applicable error messages. */
6979 grokfndecl (tree ctype,
6983 tree orig_declarator,
6985 enum overload_flags flags,
6992 special_function_kind sfk,
6997 location_t location)
7000 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
7004 type = build_exception_variant (type, raises);
7006 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
7008 /* If we have an explicit location, use it, otherwise use whatever
7009 build_lang_decl used (probably input_location). */
7010 if (location != UNKNOWN_LOCATION)
7011 DECL_SOURCE_LOCATION (decl) = location;
7013 if (TREE_CODE (type) == METHOD_TYPE)
7016 parm = build_this_parm (type, quals);
7017 DECL_CHAIN (parm) = parms;
7020 DECL_ARGUMENTS (decl) = parms;
7021 for (t = parms; t; t = DECL_CHAIN (t))
7022 DECL_CONTEXT (t) = decl;
7023 /* Propagate volatile out from type to decl. */
7024 if (TYPE_VOLATILE (type))
7025 TREE_THIS_VOLATILE (decl) = 1;
7027 /* Setup decl according to sfk. */
7030 case sfk_constructor:
7031 case sfk_copy_constructor:
7032 case sfk_move_constructor:
7033 DECL_CONSTRUCTOR_P (decl) = 1;
7035 case sfk_destructor:
7036 DECL_DESTRUCTOR_P (decl) = 1;
7042 /* If pointers to member functions use the least significant bit to
7043 indicate whether a function is virtual, ensure a pointer
7044 to this function will have that bit clear. */
7045 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
7046 && TREE_CODE (type) == METHOD_TYPE
7047 && DECL_ALIGN (decl) < 2 * BITS_PER_UNIT)
7048 DECL_ALIGN (decl) = 2 * BITS_PER_UNIT;
7051 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
7055 ("defining explicit specialization %qD in friend declaration",
7059 tree fns = TREE_OPERAND (orig_declarator, 0);
7060 tree args = TREE_OPERAND (orig_declarator, 1);
7062 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
7064 /* Something like `template <class T> friend void f<T>()'. */
7065 error ("invalid use of template-id %qD in declaration "
7066 "of primary template",
7072 /* A friend declaration of the form friend void f<>(). Record
7073 the information in the TEMPLATE_ID_EXPR. */
7074 SET_DECL_IMPLICIT_INSTANTIATION (decl);
7076 if (TREE_CODE (fns) == COMPONENT_REF)
7078 /* Due to bison parser ickiness, we will have already looked
7079 up an operator_name or PFUNCNAME within the current class
7080 (see template_id in parse.y). If the current class contains
7081 such a name, we'll get a COMPONENT_REF here. Undo that. */
7083 gcc_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
7084 == current_class_type);
7085 fns = TREE_OPERAND (fns, 1);
7087 gcc_assert (TREE_CODE (fns) == IDENTIFIER_NODE
7088 || TREE_CODE (fns) == OVERLOAD);
7089 DECL_TEMPLATE_INFO (decl) = build_template_info (fns, args);
7091 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
7092 if (TREE_PURPOSE (t)
7093 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
7095 error ("default arguments are not allowed in declaration "
7096 "of friend template specialization %qD",
7103 error ("%<inline%> is not allowed in declaration of friend "
7104 "template specialization %qD",
7111 /* If this decl has namespace scope, set that up. */
7113 set_decl_namespace (decl, in_namespace, friendp);
7115 DECL_CONTEXT (decl) = FROB_CONTEXT (current_decl_namespace ());
7117 /* `main' and builtins have implicit 'C' linkage. */
7118 if ((MAIN_NAME_P (declarator)
7119 || (IDENTIFIER_LENGTH (declarator) > 10
7120 && IDENTIFIER_POINTER (declarator)[0] == '_'
7121 && IDENTIFIER_POINTER (declarator)[1] == '_'
7122 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
7123 && current_lang_name == lang_name_cplusplus
7124 && ctype == NULL_TREE
7125 && DECL_FILE_SCOPE_P (decl))
7126 SET_DECL_LANGUAGE (decl, lang_c);
7128 /* Should probably propagate const out from type to decl I bet (mrs). */
7131 DECL_STATIC_FUNCTION_P (decl) = 1;
7132 DECL_CONTEXT (decl) = ctype;
7137 DECL_CONTEXT (decl) = ctype;
7139 check_class_member_definition_namespace (decl);
7142 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
7144 if (processing_template_decl)
7145 error ("cannot declare %<::main%> to be a template");
7147 error ("cannot declare %<::main%> to be inline");
7149 error ("cannot declare %<::main%> to be static");
7154 /* Members of anonymous types and local classes have no linkage; make
7155 them internal. If a typedef is made later, this will be changed. */
7156 if (ctype && (TYPE_ANONYMOUS_P (ctype)
7157 || decl_function_context (TYPE_MAIN_DECL (ctype))))
7160 if (publicp && cxx_dialect == cxx98)
7162 /* [basic.link]: A name with no linkage (notably, the name of a class
7163 or enumeration declared in a local scope) shall not be used to
7164 declare an entity with linkage.
7166 DR 757 relaxes this restriction for C++0x. */
7167 t = no_linkage_check (TREE_TYPE (decl),
7168 /*relaxed_p=*/false);
7171 if (TYPE_ANONYMOUS_P (t))
7173 if (DECL_EXTERN_C_P (decl))
7174 /* Allow this; it's pretty common in C. */;
7177 permerror (input_location, "anonymous type with no linkage "
7178 "used to declare function %q#D with linkage",
7180 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
7181 permerror (input_location, "%q+#D does not refer to the unqualified "
7182 "type, so it is not used for linkage",
7187 permerror (input_location, "type %qT with no linkage used to "
7188 "declare function %q#D with linkage", t, decl);
7192 TREE_PUBLIC (decl) = publicp;
7195 DECL_INTERFACE_KNOWN (decl) = 1;
7196 DECL_NOT_REALLY_EXTERN (decl) = 1;
7199 /* If the declaration was declared inline, mark it as such. */
7201 DECL_DECLARED_INLINE_P (decl) = 1;
7203 DECL_DECLARED_CONSTEXPR_P (decl) = true;
7205 DECL_EXTERNAL (decl) = 1;
7206 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
7209 ? G_("static member function %qD cannot have cv-qualifier")
7210 : G_("non-member function %qD cannot have cv-qualifier"),
7212 quals = TYPE_UNQUALIFIED;
7215 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl))
7216 && !grok_op_properties (decl, /*complain=*/true))
7220 /* Make the init_value nonzero so pushdecl knows this is not
7221 tentative. error_mark_node is replaced later with the BLOCK. */
7222 DECL_INITIAL (decl) = error_mark_node;
7224 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
7225 TREE_NOTHROW (decl) = 1;
7227 /* Caller will do the rest of this. */
7231 if (ctype != NULL_TREE)
7232 grokclassfn (ctype, decl, flags);
7234 decl = check_explicit_specialization (orig_declarator, decl,
7237 4 * (friendp != 0));
7238 if (decl == error_mark_node)
7243 cplus_decl_attributes (&decl, *attrlist, 0);
7244 *attrlist = NULL_TREE;
7247 /* Check main's type after attributes have been applied. */
7248 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
7250 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
7253 tree oldtypeargs = TYPE_ARG_TYPES (TREE_TYPE (decl));
7255 error ("%<::main%> must return %<int%>");
7256 newtype = build_function_type (integer_type_node, oldtypeargs);
7257 TREE_TYPE (decl) = newtype;
7260 check_main_parameter_types (decl);
7263 if (ctype != NULL_TREE
7264 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
7267 tree old_decl = check_classfn (ctype, decl,
7268 (processing_template_decl
7269 > template_class_depth (ctype))
7270 ? current_template_parms
7273 if (old_decl == error_mark_node)
7281 if (TREE_CODE (old_decl) == TEMPLATE_DECL)
7282 /* Because grokfndecl is always supposed to return a
7283 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
7284 here. We depend on our callers to figure out that its
7285 really a template that's being returned. */
7286 old_decl = DECL_TEMPLATE_RESULT (old_decl);
7288 if (DECL_STATIC_FUNCTION_P (old_decl)
7289 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
7290 /* Remove the `this' parm added by grokclassfn.
7291 XXX Isn't this done in start_function, too? */
7292 revert_static_member_fn (decl);
7293 if (DECL_ARTIFICIAL (old_decl))
7295 error ("definition of implicitly-declared %qD", old_decl);
7299 /* Since we've smashed OLD_DECL to its
7300 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
7301 if (TREE_CODE (decl) == TEMPLATE_DECL)
7302 decl = DECL_TEMPLATE_RESULT (decl);
7304 /* Attempt to merge the declarations. This can fail, in
7305 the case of some invalid specialization declarations. */
7306 pushed_scope = push_scope (ctype);
7307 ok = duplicate_decls (decl, old_decl, friendp);
7309 pop_scope (pushed_scope);
7312 error ("no %q#D member function declared in class %qT",
7320 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
7323 if (ctype == NULL_TREE || check)
7327 DECL_VIRTUAL_P (decl) = 1;
7332 /* decl is a FUNCTION_DECL.
7333 specifiers are the parsed virt-specifiers.
7335 Set flags to reflect the virt-specifiers.
7340 set_virt_specifiers (tree decl, cp_virt_specifiers specifiers)
7342 if (decl == NULL_TREE)
7344 if (specifiers & VIRT_SPEC_OVERRIDE)
7345 DECL_OVERRIDE_P (decl) = 1;
7346 if (specifiers & VIRT_SPEC_FINAL)
7347 DECL_FINAL_P (decl) = 1;
7351 /* DECL is a VAR_DECL for a static data member. Set flags to reflect
7352 the linkage that DECL will receive in the object file. */
7355 set_linkage_for_static_data_member (tree decl)
7357 /* A static data member always has static storage duration and
7358 external linkage. Note that static data members are forbidden in
7359 local classes -- the only situation in which a class has
7360 non-external linkage. */
7361 TREE_PUBLIC (decl) = 1;
7362 TREE_STATIC (decl) = 1;
7363 /* For non-template classes, static data members are always put
7364 out in exactly those files where they are defined, just as
7365 with ordinary namespace-scope variables. */
7366 if (!processing_template_decl)
7367 DECL_INTERFACE_KNOWN (decl) = 1;
7370 /* Create a VAR_DECL named NAME with the indicated TYPE.
7372 If SCOPE is non-NULL, it is the class type or namespace containing
7373 the variable. If SCOPE is NULL, the variable should is created in
7374 the innermost enclosings scope. */
7377 grokvardecl (tree type,
7379 const cp_decl_specifier_seq *declspecs,
7385 tree explicit_scope;
7387 gcc_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE);
7389 /* Compute the scope in which to place the variable, but remember
7390 whether or not that scope was explicitly specified by the user. */
7391 explicit_scope = scope;
7394 /* An explicit "extern" specifier indicates a namespace-scope
7396 if (declspecs->storage_class == sc_extern)
7397 scope = current_decl_namespace ();
7398 else if (!at_function_scope_p ())
7399 scope = current_scope ();
7403 && (/* If the variable is a namespace-scope variable declared in a
7404 template, we need DECL_LANG_SPECIFIC. */
7405 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
7406 /* Similarly for namespace-scope variables with language linkage
7408 || (TREE_CODE (scope) == NAMESPACE_DECL
7409 && current_lang_name != lang_name_cplusplus)
7410 /* Similarly for static data members. */
7412 decl = build_lang_decl (VAR_DECL, name, type);
7414 decl = build_decl (input_location, VAR_DECL, name, type);
7416 if (explicit_scope && TREE_CODE (explicit_scope) == NAMESPACE_DECL)
7417 set_decl_namespace (decl, explicit_scope, 0);
7419 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
7421 if (declspecs->storage_class == sc_extern)
7423 DECL_THIS_EXTERN (decl) = 1;
7424 DECL_EXTERNAL (decl) = !initialized;
7427 if (DECL_CLASS_SCOPE_P (decl))
7429 set_linkage_for_static_data_member (decl);
7430 /* This function is only called with out-of-class definitions. */
7431 DECL_EXTERNAL (decl) = 0;
7432 check_class_member_definition_namespace (decl);
7434 /* At top level, either `static' or no s.c. makes a definition
7435 (perhaps tentative), and absence of `static' makes it public. */
7436 else if (toplevel_bindings_p ())
7438 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
7439 && (DECL_THIS_EXTERN (decl) || ! constp));
7440 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
7442 /* Not at top level, only `static' makes a static definition. */
7445 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
7446 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
7449 if (declspecs->specs[(int)ds_thread])
7450 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
7452 /* If the type of the decl has no linkage, make sure that we'll
7453 notice that in mark_used. */
7454 if (cxx_dialect > cxx98
7455 && decl_linkage (decl) != lk_none
7456 && DECL_LANG_SPECIFIC (decl) == NULL
7457 && !DECL_EXTERN_C_P (decl)
7458 && no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false))
7459 retrofit_lang_decl (decl);
7461 if (TREE_PUBLIC (decl))
7463 /* [basic.link]: A name with no linkage (notably, the name of a class
7464 or enumeration declared in a local scope) shall not be used to
7465 declare an entity with linkage.
7467 DR 757 relaxes this restriction for C++0x. */
7468 tree t = (cxx_dialect > cxx98 ? NULL_TREE
7469 : no_linkage_check (TREE_TYPE (decl), /*relaxed_p=*/false));
7472 if (TYPE_ANONYMOUS_P (t))
7474 if (DECL_EXTERN_C_P (decl))
7475 /* Allow this; it's pretty common in C. */
7479 /* DRs 132, 319 and 389 seem to indicate types with
7480 no linkage can only be used to declare extern "C"
7481 entities. Since it's not always an error in the
7482 ISO C++ 90 Standard, we only issue a warning. */
7483 warning (0, "anonymous type with no linkage used to declare "
7484 "variable %q#D with linkage", decl);
7485 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
7486 warning (0, "%q+#D does not refer to the unqualified "
7487 "type, so it is not used for linkage",
7492 warning (0, "type %qT with no linkage used to declare variable "
7493 "%q#D with linkage", t, decl);
7497 DECL_INTERFACE_KNOWN (decl) = 1;
7502 /* Create and return a canonical pointer to member function type, for
7503 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
7506 build_ptrmemfunc_type (tree type)
7510 tree unqualified_variant = NULL_TREE;
7512 if (type == error_mark_node)
7515 /* If a canonical type already exists for this type, use it. We use
7516 this method instead of type_hash_canon, because it only does a
7517 simple equality check on the list of field members. */
7519 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
7522 /* Make sure that we always have the unqualified pointer-to-member
7524 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7526 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
7528 t = make_class_type (RECORD_TYPE);
7529 xref_basetypes (t, NULL_TREE);
7531 /* Let the front end know this is a pointer to member function... */
7532 TYPE_PTRMEMFUNC_FLAG (t) = 1;
7533 /* ... and not really a class type. */
7534 SET_CLASS_TYPE_P (t, 0);
7536 field = build_decl (input_location, FIELD_DECL, pfn_identifier, type);
7539 field = build_decl (input_location, FIELD_DECL, delta_identifier,
7541 DECL_CHAIN (field) = fields;
7544 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
7546 /* Zap out the name so that the back end will give us the debugging
7547 information for this anonymous RECORD_TYPE. */
7548 TYPE_NAME (t) = NULL_TREE;
7550 /* If this is not the unqualified form of this pointer-to-member
7551 type, set the TYPE_MAIN_VARIANT for this type to be the
7552 unqualified type. Since they are actually RECORD_TYPEs that are
7553 not variants of each other, we must do this manually.
7554 As we just built a new type there is no need to do yet another copy. */
7555 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
7557 int type_quals = cp_type_quals (type);
7558 TYPE_READONLY (t) = (type_quals & TYPE_QUAL_CONST) != 0;
7559 TYPE_VOLATILE (t) = (type_quals & TYPE_QUAL_VOLATILE) != 0;
7560 TYPE_RESTRICT (t) = (type_quals & TYPE_QUAL_RESTRICT) != 0;
7561 TYPE_MAIN_VARIANT (t) = unqualified_variant;
7562 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
7563 TYPE_NEXT_VARIANT (unqualified_variant) = t;
7564 TREE_TYPE (TYPE_BINFO (t)) = t;
7567 /* Cache this pointer-to-member type so that we can find it again
7569 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
7571 if (TYPE_STRUCTURAL_EQUALITY_P (type))
7572 SET_TYPE_STRUCTURAL_EQUALITY (t);
7573 else if (TYPE_CANONICAL (type) != type)
7574 TYPE_CANONICAL (t) = build_ptrmemfunc_type (TYPE_CANONICAL (type));
7579 /* Create and return a pointer to data member type. */
7582 build_ptrmem_type (tree class_type, tree member_type)
7584 if (TREE_CODE (member_type) == METHOD_TYPE)
7586 cp_cv_quals quals = type_memfn_quals (member_type);
7587 member_type = build_memfn_type (member_type, class_type, quals);
7588 return build_ptrmemfunc_type (build_pointer_type (member_type));
7592 gcc_assert (TREE_CODE (member_type) != FUNCTION_TYPE);
7593 return build_offset_type (class_type, member_type);
7597 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
7598 Check to see that the definition is valid. Issue appropriate error
7599 messages. Return 1 if the definition is particularly bad, or 0
7603 check_static_variable_definition (tree decl, tree type)
7605 /* If DECL is declared constexpr, we'll do the appropriate checks
7606 in check_initializer. */
7607 if (DECL_P (decl) && DECL_DECLARED_CONSTEXPR_P (decl))
7609 else if (cxx_dialect >= cxx0x && !INTEGRAL_OR_ENUMERATION_TYPE_P (type))
7611 if (literal_type_p (type))
7612 error ("%<constexpr%> needed for in-class initialization of static "
7613 "data member %q#D of non-integral type", decl);
7615 error ("in-class initialization of static data member %q#D of "
7616 "non-literal type", decl);
7620 /* Motion 10 at San Diego: If a static const integral data member is
7621 initialized with an integral constant expression, the initializer
7622 may appear either in the declaration (within the class), or in
7623 the definition, but not both. If it appears in the class, the
7624 member is a member constant. The file-scope definition is always
7626 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
7628 error ("invalid in-class initialization of static data member "
7629 "of non-integral type %qT",
7633 else if (!CP_TYPE_CONST_P (type))
7634 error ("ISO C++ forbids in-class initialization of non-const "
7635 "static member %qD",
7637 else if (!INTEGRAL_OR_ENUMERATION_TYPE_P (type))
7638 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids initialization of member constant "
7639 "%qD of non-integral type %qT", decl, type);
7644 /* *expr_p is part of the TYPE_SIZE of a variably-sized array. If any
7645 SAVE_EXPRs in *expr_p wrap expressions with side-effects, break those
7646 expressions out into temporary variables so that walk_tree doesn't
7647 step into them (c++/15764). */
7650 stabilize_save_expr_r (tree *expr_p, int *walk_subtrees, void *data)
7652 struct pointer_set_t *pset = (struct pointer_set_t *)data;
7653 tree expr = *expr_p;
7654 if (TREE_CODE (expr) == SAVE_EXPR)
7656 tree op = TREE_OPERAND (expr, 0);
7657 cp_walk_tree (&op, stabilize_save_expr_r, data, pset);
7658 if (TREE_SIDE_EFFECTS (op))
7659 TREE_OPERAND (expr, 0) = get_temp_regvar (TREE_TYPE (op), op);
7662 else if (!EXPR_P (expr) || !TREE_SIDE_EFFECTS (expr))
7667 /* Entry point for the above. */
7670 stabilize_vla_size (tree size)
7672 struct pointer_set_t *pset = pointer_set_create ();
7673 /* Break out any function calls into temporary variables. */
7674 cp_walk_tree (&size, stabilize_save_expr_r, pset, pset);
7677 /* Given the SIZE (i.e., number of elements) in an array, compute an
7678 appropriate index type for the array. If non-NULL, NAME is the
7679 name of the thing being declared. */
7682 compute_array_index_type (tree name, tree size, tsubst_flags_t complain)
7687 tree abi_1_itype = NULL_TREE;
7689 if (error_operand_p (size))
7690 return error_mark_node;
7692 type = TREE_TYPE (size);
7693 /* type_dependent_expression_p? */
7694 if (!dependent_type_p (type))
7696 mark_rvalue_use (size);
7698 if (cxx_dialect < cxx0x && TREE_CODE (size) == NOP_EXPR
7699 && TREE_SIDE_EFFECTS (size))
7700 /* In C++98, we mark a non-constant array bound with a magic
7701 NOP_EXPR with TREE_SIDE_EFFECTS; don't fold in that case. */;
7704 size = fold_non_dependent_expr (size);
7706 if (CLASS_TYPE_P (type)
7707 && CLASSTYPE_LITERAL_P (type))
7709 size = build_expr_type_conversion (WANT_INT, size, true);
7712 if (!(complain & tf_error))
7713 return error_mark_node;
7715 error ("size of array %qD has non-integral type %qT",
7718 error ("size of array has non-integral type %qT", type);
7719 size = integer_one_node;
7721 if (size == error_mark_node)
7722 return error_mark_node;
7723 type = TREE_TYPE (size);
7724 /* We didn't support this case in GCC 3.2, so don't bother
7725 trying to model it now in ABI v1. */
7726 abi_1_itype = error_mark_node;
7729 size = maybe_constant_value (size);
7730 if (!TREE_CONSTANT (size))
7734 if (error_operand_p (size))
7735 return error_mark_node;
7737 /* The array bound must be an integer type. */
7738 if (!INTEGRAL_OR_UNSCOPED_ENUMERATION_TYPE_P (type))
7740 if (!(complain & tf_error))
7741 return error_mark_node;
7743 error ("size of array %qD has non-integral type %qT", name, type);
7745 error ("size of array has non-integral type %qT", type);
7746 size = integer_one_node;
7747 type = TREE_TYPE (size);
7751 /* A type is dependent if it is...an array type constructed from any
7752 dependent type or whose size is specified by a constant expression
7753 that is value-dependent. */
7754 /* We can only call value_dependent_expression_p on integral constant
7755 expressions; treat non-constant expressions as dependent, too. */
7756 if (processing_template_decl
7757 && (dependent_type_p (type)
7758 || !TREE_CONSTANT (size) || value_dependent_expression_p (size)))
7760 /* We cannot do any checking for a SIZE that isn't known to be
7761 constant. Just build the index type and mark that it requires
7762 structural equality checks. */
7763 itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7764 size, integer_one_node));
7765 TYPE_DEPENDENT_P (itype) = 1;
7766 TYPE_DEPENDENT_P_VALID (itype) = 1;
7767 SET_TYPE_STRUCTURAL_EQUALITY (itype);
7771 if (!abi_version_at_least (2) && processing_template_decl
7772 && abi_1_itype == NULL_TREE)
7773 /* For abi-1, we handled all instances in templates the same way,
7774 even when they were non-dependent. This affects the manglings
7775 produced. So, we do the normal checking for non-dependent
7776 sizes, but at the end we'll return the same type that abi-1
7777 would have, but with TYPE_CANONICAL set to the "right"
7778 value that the current ABI would provide. */
7779 abi_1_itype = build_index_type (build_min (MINUS_EXPR, sizetype,
7780 osize, integer_one_node));
7782 /* Normally, the array-bound will be a constant. */
7783 if (TREE_CODE (size) == INTEGER_CST)
7785 /* Check to see if the array bound overflowed. Make that an
7786 error, no matter how generous we're being. */
7787 constant_expression_error (size);
7789 /* An array must have a positive number of elements. */
7790 if (INT_CST_LT (size, integer_zero_node))
7792 if (!(complain & tf_error))
7793 return error_mark_node;
7795 error ("size of array %qD is negative", name);
7797 error ("size of array is negative");
7798 size = integer_one_node;
7800 /* As an extension we allow zero-sized arrays. */
7801 else if (integer_zerop (size))
7803 if (!(complain & tf_error))
7804 /* We must fail if performing argument deduction (as
7805 indicated by the state of complain), so that
7806 another substitution can be found. */
7807 return error_mark_node;
7808 else if (in_system_header)
7809 /* Allow them in system headers because glibc uses them. */;
7811 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array %qD", name);
7813 pedwarn (input_location, OPT_pedantic, "ISO C++ forbids zero-size array");
7816 else if (TREE_CONSTANT (size)
7817 /* We don't allow VLAs at non-function scopes, or during
7818 tentative template substitution. */
7819 || !at_function_scope_p () || !(complain & tf_error))
7821 if (!(complain & tf_error))
7822 return error_mark_node;
7823 /* `(int) &fn' is not a valid array bound. */
7825 error ("size of array %qD is not an integral constant-expression",
7828 error ("size of array is not an integral constant-expression");
7829 size = integer_one_node;
7831 else if (pedantic && warn_vla != 0)
7834 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array %qD", name);
7836 pedwarn (input_location, OPT_Wvla, "ISO C++ forbids variable length array");
7838 else if (warn_vla > 0)
7842 "variable length array %qD is used", name);
7845 "variable length array is used");
7848 if (processing_template_decl && !TREE_CONSTANT (size))
7849 /* A variable sized array. */
7850 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
7853 HOST_WIDE_INT saved_processing_template_decl;
7855 /* Compute the index of the largest element in the array. It is
7856 one less than the number of elements in the array. We save
7857 and restore PROCESSING_TEMPLATE_DECL so that computations in
7858 cp_build_binary_op will be appropriately folded. */
7859 saved_processing_template_decl = processing_template_decl;
7860 processing_template_decl = 0;
7861 itype = cp_build_binary_op (input_location,
7863 cp_convert (ssizetype, size),
7864 cp_convert (ssizetype, integer_one_node),
7865 tf_warning_or_error);
7866 itype = fold (itype);
7867 processing_template_decl = saved_processing_template_decl;
7869 if (!TREE_CONSTANT (itype))
7870 /* A variable sized array. */
7871 itype = variable_size (itype);
7872 /* Make sure that there was no overflow when creating to a signed
7873 index type. (For example, on a 32-bit machine, an array with
7874 size 2^32 - 1 is too big.) */
7875 else if (TREE_CODE (itype) == INTEGER_CST
7876 && TREE_OVERFLOW (itype))
7878 if (!(complain & tf_error))
7879 return error_mark_node;
7880 error ("overflow in array dimension");
7881 TREE_OVERFLOW (itype) = 0;
7885 /* Create and return the appropriate index type. */
7886 if (abi_1_itype && abi_1_itype != error_mark_node)
7888 tree t = build_index_type (itype);
7889 TYPE_CANONICAL (abi_1_itype) = TYPE_CANONICAL (t);
7890 itype = abi_1_itype;
7893 itype = build_index_type (itype);
7895 /* If the index type were dependent, we would have returned early, so
7896 remember that it isn't. */
7897 TYPE_DEPENDENT_P (itype) = 0;
7898 TYPE_DEPENDENT_P_VALID (itype) = 1;
7902 /* Returns the scope (if any) in which the entity declared by
7903 DECLARATOR will be located. If the entity was declared with an
7904 unqualified name, NULL_TREE is returned. */
7907 get_scope_of_declarator (const cp_declarator *declarator)
7909 while (declarator && declarator->kind != cdk_id)
7910 declarator = declarator->declarator;
7912 /* If the declarator-id is a SCOPE_REF, the scope in which the
7913 declaration occurs is the first operand. */
7915 && declarator->u.id.qualifying_scope)
7916 return declarator->u.id.qualifying_scope;
7918 /* Otherwise, the declarator is not a qualified name; the entity will
7919 be declared in the current scope. */
7923 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
7924 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
7928 create_array_type_for_decl (tree name, tree type, tree size)
7930 tree itype = NULL_TREE;
7932 /* If things have already gone awry, bail now. */
7933 if (type == error_mark_node || size == error_mark_node)
7934 return error_mark_node;
7936 /* If there are some types which cannot be array elements,
7937 issue an error-message and return. */
7938 switch (TREE_CODE (type))
7942 error ("declaration of %qD as array of void", name);
7944 error ("creating array of void");
7945 return error_mark_node;
7949 error ("declaration of %qD as array of functions", name);
7951 error ("creating array of functions");
7952 return error_mark_node;
7954 case REFERENCE_TYPE:
7956 error ("declaration of %qD as array of references", name);
7958 error ("creating array of references");
7959 return error_mark_node;
7963 error ("declaration of %qD as array of function members", name);
7965 error ("creating array of function members");
7966 return error_mark_node;
7974 The constant expressions that specify the bounds of the arrays
7975 can be omitted only for the first member of the sequence. */
7976 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
7979 error ("declaration of %qD as multidimensional array must "
7980 "have bounds for all dimensions except the first",
7983 error ("multidimensional array must have bounds for all "
7984 "dimensions except the first");
7986 return error_mark_node;
7989 /* Figure out the index type for the array. */
7991 itype = compute_array_index_type (name, size, tf_warning_or_error);
7994 T is called the array element type; this type shall not be [...] an
7995 abstract class type. */
7996 abstract_virtuals_error (name, type);
7998 return build_cplus_array_type (type, itype);
8001 /* Check that it's OK to declare a function with the indicated TYPE.
8002 SFK indicates the kind of special function (if any) that this
8003 function is. OPTYPE is the type given in a conversion operator
8004 declaration, or the class type for a constructor/destructor.
8005 Returns the actual return type of the function; that
8006 may be different than TYPE if an error occurs, or for certain
8007 special functions. */
8010 check_special_function_return_type (special_function_kind sfk,
8016 case sfk_constructor:
8018 error ("return type specification for constructor invalid");
8020 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
8021 type = build_pointer_type (optype);
8023 type = void_type_node;
8026 case sfk_destructor:
8028 error ("return type specification for destructor invalid");
8029 /* We can't use the proper return type here because we run into
8030 problems with ambiguous bases and covariant returns.
8031 Java classes are left unchanged because (void *) isn't a valid
8032 Java type, and we don't want to change the Java ABI. */
8033 if (targetm.cxx.cdtor_returns_this () && !TYPE_FOR_JAVA (optype))
8034 type = build_pointer_type (void_type_node);
8036 type = void_type_node;
8039 case sfk_conversion:
8041 error ("return type specified for %<operator %T%>", optype);
8052 /* A variable or data member (whose unqualified name is IDENTIFIER)
8053 has been declared with the indicated TYPE. If the TYPE is not
8054 acceptable, issue an error message and return a type to use for
8055 error-recovery purposes. */
8058 check_var_type (tree identifier, tree type)
8060 if (VOID_TYPE_P (type))
8063 error ("unnamed variable or field declared void");
8064 else if (TREE_CODE (identifier) == IDENTIFIER_NODE)
8066 gcc_assert (!IDENTIFIER_OPNAME_P (identifier));
8067 error ("variable or field %qE declared void", identifier);
8070 error ("variable or field declared void");
8071 type = error_mark_node;
8077 /* Given declspecs and a declarator (abstract or otherwise), determine
8078 the name and type of the object declared and construct a DECL node
8081 DECLSPECS points to the representation of declaration-specifier
8082 sequence that precedes declarator.
8084 DECL_CONTEXT says which syntactic context this declaration is in:
8085 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
8086 FUNCDEF for a function definition. Like NORMAL but a few different
8087 error messages in each case. Return value may be zero meaning
8088 this definition is too screwy to try to parse.
8089 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
8090 handle member functions (which have FIELD context).
8091 Return value may be zero meaning this definition is too screwy to
8093 PARM for a parameter declaration (either within a function prototype
8094 or before a function body). Make a PARM_DECL, or return void_type_node.
8095 TPARM for a template parameter declaration.
8096 CATCHPARM for a parameter declaration before a catch clause.
8097 TYPENAME if for a typename (in a cast or sizeof).
8098 Don't make a DECL node; just return the ..._TYPE node.
8099 FIELD for a struct or union field; make a FIELD_DECL.
8100 BITFIELD for a field with specified width.
8102 INITIALIZED is as for start_decl.
8104 ATTRLIST is a pointer to the list of attributes, which may be NULL
8105 if there are none; *ATTRLIST may be modified if attributes from inside
8106 the declarator should be applied to the declaration.
8108 When this function is called, scoping variables (such as
8109 CURRENT_CLASS_TYPE) should reflect the scope in which the
8110 declaration occurs, not the scope in which the new declaration will
8111 be placed. For example, on:
8115 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
8118 Returns a DECL (if a declarator is present), a TYPE (if there is no
8119 declarator, in cases like "struct S;"), or the ERROR_MARK_NODE if an
8123 grokdeclarator (const cp_declarator *declarator,
8124 const cp_decl_specifier_seq *declspecs,
8125 enum decl_context decl_context,
8129 tree type = NULL_TREE;
8131 int explicit_int128 = 0;
8132 int virtualp, explicitp, friendp, inlinep, staticp;
8133 int explicit_int = 0;
8134 int explicit_char = 0;
8135 int defaulted_int = 0;
8136 tree dependent_name = NULL_TREE;
8138 tree typedef_decl = NULL_TREE;
8139 const char *name = NULL;
8140 tree typedef_type = NULL_TREE;
8141 /* True if this declarator is a function definition. */
8142 bool funcdef_flag = false;
8143 cp_declarator_kind innermost_code = cdk_error;
8146 /* See the code below that used this. */
8147 tree decl_attr = NULL_TREE;
8150 /* Keep track of what sort of function is being processed
8151 so that we can warn about default return values, or explicit
8152 return values which do not match prescribed defaults. */
8153 special_function_kind sfk = sfk_none;
8155 tree dname = NULL_TREE;
8156 tree ctor_return_type = NULL_TREE;
8157 enum overload_flags flags = NO_SPECIAL;
8158 /* cv-qualifiers that apply to the declarator, for a declaration of
8159 a member function. */
8160 cp_cv_quals memfn_quals = TYPE_UNQUALIFIED;
8161 /* virt-specifiers that apply to the declarator, for a declaration of
8162 a member function. */
8163 cp_virt_specifiers virt_specifiers = VIRT_SPEC_UNSPECIFIED;
8164 /* cv-qualifiers that apply to the type specified by the DECLSPECS. */
8166 tree raises = NULL_TREE;
8167 int template_count = 0;
8168 tree returned_attrs = NULL_TREE;
8169 tree parms = NULL_TREE;
8170 const cp_declarator *id_declarator;
8171 /* The unqualified name of the declarator; either an
8172 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
8173 tree unqualified_id;
8174 /* The class type, if any, in which this entity is located,
8175 or NULL_TREE if none. Note that this value may be different from
8176 the current class type; for example if an attempt is made to declare
8177 "A::f" inside "B", this value will be "A". */
8178 tree ctype = current_class_type;
8179 /* The NAMESPACE_DECL for the namespace in which this entity is
8180 located. If an unqualified name is used to declare the entity,
8181 this value will be NULL_TREE, even if the entity is located at
8183 tree in_namespace = NULL_TREE;
8184 cp_storage_class storage_class;
8185 bool unsigned_p, signed_p, short_p, long_p, thread_p;
8186 bool type_was_error_mark_node = false;
8187 bool parameter_pack_p = declarator? declarator->parameter_pack_p : false;
8188 bool template_type_arg = false;
8189 bool template_parm_flag = false;
8190 bool constexpr_p = declspecs->specs[(int) ds_constexpr];
8193 signed_p = declspecs->specs[(int)ds_signed];
8194 unsigned_p = declspecs->specs[(int)ds_unsigned];
8195 short_p = declspecs->specs[(int)ds_short];
8196 long_p = declspecs->specs[(int)ds_long];
8197 longlong = declspecs->specs[(int)ds_long] >= 2;
8198 explicit_int128 = declspecs->explicit_int128_p;
8199 thread_p = declspecs->specs[(int)ds_thread];
8201 if (decl_context == FUNCDEF)
8202 funcdef_flag = true, decl_context = NORMAL;
8203 else if (decl_context == MEMFUNCDEF)
8204 funcdef_flag = true, decl_context = FIELD;
8205 else if (decl_context == BITFIELD)
8206 bitfield = 1, decl_context = FIELD;
8207 else if (decl_context == TEMPLATE_TYPE_ARG)
8208 template_type_arg = true, decl_context = TYPENAME;
8209 else if (decl_context == TPARM)
8210 template_parm_flag = true, decl_context = PARM;
8212 if (initialized > 1)
8213 funcdef_flag = true;
8215 /* Look inside a declarator for the name being declared
8216 and get it as a string, for an error message. */
8217 for (id_declarator = declarator;
8219 id_declarator = id_declarator->declarator)
8221 if (id_declarator->kind != cdk_id)
8222 innermost_code = id_declarator->kind;
8224 switch (id_declarator->kind)
8227 if (id_declarator->declarator
8228 && id_declarator->declarator->kind == cdk_id)
8230 sfk = id_declarator->declarator->u.id.sfk;
8231 if (sfk == sfk_destructor)
8238 tree qualifying_scope = id_declarator->u.id.qualifying_scope;
8239 tree decl = id_declarator->u.id.unqualified_name;
8242 if (qualifying_scope)
8244 if (at_function_scope_p ())
8248 A declarator-id shall not be qualified except
8251 None of the cases are permitted in block
8253 if (qualifying_scope == global_namespace)
8254 error ("invalid use of qualified-name %<::%D%>",
8256 else if (TYPE_P (qualifying_scope))
8257 error ("invalid use of qualified-name %<%T::%D%>",
8258 qualifying_scope, decl);
8260 error ("invalid use of qualified-name %<%D::%D%>",
8261 qualifying_scope, decl);
8262 return error_mark_node;
8264 else if (TYPE_P (qualifying_scope))
8266 ctype = qualifying_scope;
8267 if (innermost_code != cdk_function
8268 && current_class_type
8269 && !UNIQUELY_DERIVED_FROM_P (ctype,
8270 current_class_type))
8272 error ("type %qT is not derived from type %qT",
8273 ctype, current_class_type);
8274 return error_mark_node;
8277 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
8278 in_namespace = qualifying_scope;
8280 switch (TREE_CODE (decl))
8286 if (innermost_code != cdk_function)
8288 error ("declaration of %qD as non-function", decl);
8289 return error_mark_node;
8291 else if (!qualifying_scope
8292 && !(current_class_type && at_class_scope_p ()))
8294 error ("declaration of %qD as non-member", decl);
8295 return error_mark_node;
8298 type = TREE_OPERAND (decl, 0);
8300 type = constructor_name (type);
8301 name = identifier_to_locale (IDENTIFIER_POINTER (type));
8306 case TEMPLATE_ID_EXPR:
8308 tree fns = TREE_OPERAND (decl, 0);
8311 if (TREE_CODE (dname) != IDENTIFIER_NODE)
8313 gcc_assert (is_overloaded_fn (dname));
8314 dname = DECL_NAME (get_first_fn (dname));
8319 case IDENTIFIER_NODE:
8320 if (TREE_CODE (decl) == IDENTIFIER_NODE)
8323 if (C_IS_RESERVED_WORD (dname))
8325 error ("declarator-id missing; using reserved word %qD",
8327 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
8329 else if (!IDENTIFIER_TYPENAME_P (dname))
8330 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
8333 gcc_assert (flags == NO_SPECIAL);
8334 flags = TYPENAME_FLAG;
8335 ctor_return_type = TREE_TYPE (dname);
8336 sfk = sfk_conversion;
8337 if (is_typename_at_global_scope (dname))
8338 name = identifier_to_locale (IDENTIFIER_POINTER (dname));
8340 name = "<invalid operator>";
8357 return error_mark_node;
8362 if (id_declarator->kind == cdk_id)
8368 The declarator in a function-definition shall have the form
8369 D1 ( parameter-declaration-clause) ... */
8370 if (funcdef_flag && innermost_code != cdk_function)
8372 error ("function definition does not declare parameters");
8373 return error_mark_node;
8376 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
8377 && innermost_code != cdk_function
8378 && ! (ctype && !declspecs->any_specifiers_p))
8380 error ("declaration of %qD as non-function", dname);
8381 return error_mark_node;
8384 /* Anything declared one level down from the top level
8385 must be one of the parameters of a function
8386 (because the body is at least two levels down). */
8388 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
8389 by not allowing C++ class definitions to specify their parameters
8390 with xdecls (must be spec.d in the parmlist).
8392 Since we now wait to push a class scope until we are sure that
8393 we are in a legitimate method context, we must set oldcname
8394 explicitly (since current_class_name is not yet alive).
8396 We also want to avoid calling this a PARM if it is in a namespace. */
8398 if (decl_context == NORMAL && !toplevel_bindings_p ())
8400 struct cp_binding_level *b = current_binding_level;
8401 current_binding_level = b->level_chain;
8402 if (current_binding_level != 0 && toplevel_bindings_p ())
8403 decl_context = PARM;
8404 current_binding_level = b;
8408 name = decl_context == PARM ? "parameter" : "type name";
8410 if (constexpr_p && declspecs->specs[(int)ds_typedef])
8412 error ("%<constexpr%> cannot appear in a typedef declaration");
8413 return error_mark_node;
8416 /* If there were multiple types specified in the decl-specifier-seq,
8417 issue an error message. */
8418 if (declspecs->multiple_types_p)
8420 error ("two or more data types in declaration of %qs", name);
8421 return error_mark_node;
8424 if (declspecs->conflicting_specifiers_p)
8426 error ("conflicting specifiers in declaration of %qs", name);
8427 return error_mark_node;
8430 /* Extract the basic type from the decl-specifier-seq. */
8431 type = declspecs->type;
8432 if (type == error_mark_node)
8435 type_was_error_mark_node = true;
8437 /* If the entire declaration is itself tagged as deprecated then
8438 suppress reports of deprecated items. */
8439 if (type && TREE_DEPRECATED (type)
8440 && deprecated_state != DEPRECATED_SUPPRESS)
8441 warn_deprecated_use (type, NULL_TREE);
8442 if (type && TREE_CODE (type) == TYPE_DECL)
8444 typedef_decl = type;
8445 type = TREE_TYPE (typedef_decl);
8446 if (TREE_DEPRECATED (type)
8447 && DECL_ARTIFICIAL (typedef_decl)
8448 && deprecated_state != DEPRECATED_SUPPRESS)
8449 warn_deprecated_use (type, NULL_TREE);
8451 /* No type at all: default to `int', and set DEFAULTED_INT
8452 because it was not a user-defined typedef. */
8453 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
8455 /* These imply 'int'. */
8456 type = integer_type_node;
8460 explicit_int = declspecs->explicit_int_p;
8461 explicit_char = declspecs->explicit_char_p;
8464 /* See the code below that used this. */
8466 decl_attr = DECL_ATTRIBUTES (typedef_decl);
8468 typedef_type = type;
8471 if (sfk != sfk_conversion)
8472 ctor_return_type = ctype;
8474 if (sfk != sfk_none)
8475 type = check_special_function_return_type (sfk, type,
8477 else if (type == NULL_TREE)
8483 /* We handle `main' specially here, because 'main () { }' is so
8484 common. With no options, it is allowed. With -Wreturn-type,
8485 it is a warning. It is only an error with -pedantic-errors. */
8486 is_main = (funcdef_flag
8487 && dname && TREE_CODE (dname) == IDENTIFIER_NODE
8488 && MAIN_NAME_P (dname)
8489 && ctype == NULL_TREE
8490 && in_namespace == NULL_TREE
8491 && current_namespace == global_namespace);
8493 if (type_was_error_mark_node)
8494 /* We've already issued an error, don't complain more. */;
8495 else if (in_system_header || flag_ms_extensions)
8496 /* Allow it, sigh. */;
8498 permerror (input_location, "ISO C++ forbids declaration of %qs with no type", name);
8500 pedwarn (input_location, OPT_pedantic,
8501 "ISO C++ forbids declaration of %qs with no type", name);
8503 warning (OPT_Wreturn_type,
8504 "ISO C++ forbids declaration of %qs with no type", name);
8506 type = integer_type_node;
8511 /* Now process the modifiers that were specified
8512 and check for invalid combinations. */
8514 /* Long double is a special combination. */
8515 if (long_p && !longlong && TYPE_MAIN_VARIANT (type) == double_type_node)
8518 type = cp_build_qualified_type (long_double_type_node,
8519 cp_type_quals (type));
8522 /* Check all other uses of type modifiers. */
8524 if (unsigned_p || signed_p || long_p || short_p)
8528 if ((signed_p || unsigned_p) && TREE_CODE (type) != INTEGER_TYPE)
8529 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
8530 else if (signed_p && unsigned_p)
8531 error ("%<signed%> and %<unsigned%> specified together for %qs", name);
8532 else if (longlong && TREE_CODE (type) != INTEGER_TYPE)
8533 error ("%<long long%> invalid for %qs", name);
8534 else if (explicit_int128 && TREE_CODE (type) != INTEGER_TYPE)
8535 error ("%<__int128%> invalid for %qs", name);
8536 else if (long_p && TREE_CODE (type) == REAL_TYPE)
8537 error ("%<long%> invalid for %qs", name);
8538 else if (short_p && TREE_CODE (type) == REAL_TYPE)
8539 error ("%<short%> invalid for %qs", name);
8540 else if ((long_p || short_p) && TREE_CODE (type) != INTEGER_TYPE)
8541 error ("%<long%> or %<short%> invalid for %qs", name);
8542 else if ((long_p || short_p || explicit_char || explicit_int) && explicit_int128)
8543 error ("%<long%>, %<int%>, %<short%>, or %<char%> invalid for %qs", name);
8544 else if ((long_p || short_p) && explicit_char)
8545 error ("%<long%> or %<short%> specified with char for %qs", name);
8546 else if (long_p && short_p)
8547 error ("%<long%> and %<short%> specified together for %qs", name);
8548 else if (type == char16_type_node || type == char32_type_node)
8550 if (signed_p || unsigned_p)
8551 error ("%<signed%> or %<unsigned%> invalid for %qs", name);
8552 else if (short_p || long_p)
8553 error ("%<short%> or %<long%> invalid for %qs", name);
8558 if (!explicit_int && !defaulted_int && !explicit_char && !explicit_int128 && pedantic)
8560 pedwarn (input_location, OPT_pedantic,
8561 "long, short, signed or unsigned used invalidly for %qs",
8563 if (flag_pedantic_errors)
8566 if (explicit_int128)
8568 if (int128_integer_type_node == NULL_TREE)
8570 error ("%<__int128%> is not supported by this target");
8575 pedwarn (input_location, OPT_pedantic,
8576 "ISO C++ does not support %<__int128%> for %qs",
8578 if (flag_pedantic_errors)
8584 /* Discard the type modifiers if they are invalid. */
8592 explicit_int128 = false;
8596 /* Decide whether an integer type is signed or not.
8597 Optionally treat bitfields as signed by default. */
8601 It is implementation-defined whether a plain (neither
8602 explicitly signed or unsigned) char, short, int, or long
8603 bit-field is signed or unsigned.
8605 Naturally, we extend this to long long as well. Note that
8606 this does not include wchar_t. */
8607 || (bitfield && !flag_signed_bitfields
8609 /* A typedef for plain `int' without `signed' can be
8610 controlled just like plain `int', but a typedef for
8611 `signed int' cannot be so controlled. */
8613 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
8614 && TREE_CODE (type) == INTEGER_TYPE
8615 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
8617 if (explicit_int128)
8618 type = int128_unsigned_type_node;
8620 type = long_long_unsigned_type_node;
8622 type = long_unsigned_type_node;
8624 type = short_unsigned_type_node;
8625 else if (type == char_type_node)
8626 type = unsigned_char_type_node;
8627 else if (typedef_decl)
8628 type = unsigned_type_for (type);
8630 type = unsigned_type_node;
8632 else if (signed_p && type == char_type_node)
8633 type = signed_char_type_node;
8634 else if (explicit_int128)
8635 type = int128_integer_type_node;
8637 type = long_long_integer_type_node;
8639 type = long_integer_type_node;
8641 type = short_integer_type_node;
8643 if (declspecs->specs[(int)ds_complex])
8645 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
8646 error ("complex invalid for %qs", name);
8647 /* If we just have "complex", it is equivalent to
8648 "complex double", but if any modifiers at all are specified it is
8649 the complex form of TYPE. E.g, "complex short" is
8650 "complex short int". */
8651 else if (defaulted_int && ! longlong && ! explicit_int128
8652 && ! (long_p || short_p || signed_p || unsigned_p))
8653 type = complex_double_type_node;
8654 else if (type == integer_type_node)
8655 type = complex_integer_type_node;
8656 else if (type == float_type_node)
8657 type = complex_float_type_node;
8658 else if (type == double_type_node)
8659 type = complex_double_type_node;
8660 else if (type == long_double_type_node)
8661 type = complex_long_double_type_node;
8663 type = build_complex_type (type);
8666 type_quals = TYPE_UNQUALIFIED;
8667 if (declspecs->specs[(int)ds_const])
8668 type_quals |= TYPE_QUAL_CONST;
8669 if (declspecs->specs[(int)ds_volatile])
8670 type_quals |= TYPE_QUAL_VOLATILE;
8671 if (declspecs->specs[(int)ds_restrict])
8672 type_quals |= TYPE_QUAL_RESTRICT;
8673 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
8674 error ("qualifiers are not allowed on declaration of %<operator %T%>",
8677 type_quals |= cp_type_quals (type);
8678 type = cp_build_qualified_type_real
8679 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
8680 ? tf_ignore_bad_quals : 0) | tf_warning_or_error));
8681 /* We might have ignored or rejected some of the qualifiers. */
8682 type_quals = cp_type_quals (type);
8685 inlinep = !! declspecs->specs[(int)ds_inline];
8686 virtualp = !! declspecs->specs[(int)ds_virtual];
8687 explicitp = !! declspecs->specs[(int)ds_explicit];
8689 storage_class = declspecs->storage_class;
8690 if (storage_class == sc_static)
8691 staticp = 1 + (decl_context == FIELD);
8693 if (virtualp && staticp == 2)
8695 error ("member %qD cannot be declared both virtual and static", dname);
8696 storage_class = sc_none;
8699 friendp = !! declspecs->specs[(int)ds_friend];
8701 if (dependent_name && !friendp)
8703 error ("%<%T::%D%> is not a valid declarator", ctype, dependent_name);
8704 return error_mark_node;
8707 /* Issue errors about use of storage classes for parameters. */
8708 if (decl_context == PARM)
8710 if (declspecs->specs[(int)ds_typedef])
8712 error ("typedef declaration invalid in parameter declaration");
8713 return error_mark_node;
8715 else if (template_parm_flag && storage_class != sc_none)
8717 error ("storage class specified for template parameter %qs", name);
8718 return error_mark_node;
8720 else if (storage_class == sc_static
8721 || storage_class == sc_extern
8723 error ("storage class specifiers invalid in parameter declarations");
8725 if (type_uses_auto (type))
8727 error ("parameter declared %<auto%>");
8728 type = error_mark_node;
8731 /* Function parameters cannot be constexpr. If we saw one, moan
8732 and pretend it wasn't there. */
8735 error ("a parameter cannot be declared %<constexpr%>");
8740 /* Give error if `virtual' is used outside of class declaration. */
8742 && (current_class_name == NULL_TREE || decl_context != FIELD))
8744 error ("%<virtual%> outside class declaration");
8748 /* Static anonymous unions are dealt with here. */
8749 if (staticp && decl_context == TYPENAME
8751 && ANON_AGGR_TYPE_P (declspecs->type))
8752 decl_context = FIELD;
8754 /* Warn about storage classes that are invalid for certain
8755 kinds of declarations (parameters, typenames, etc.). */
8758 && storage_class != sc_extern
8759 && storage_class != sc_static)
8760 || declspecs->specs[(int)ds_typedef]))
8762 error ("multiple storage classes in declaration of %qs", name);
8765 if (decl_context != NORMAL
8766 && ((storage_class != sc_none
8767 && storage_class != sc_mutable)
8770 if ((decl_context == PARM || decl_context == CATCHPARM)
8771 && (storage_class == sc_register
8772 || storage_class == sc_auto))
8774 else if (declspecs->specs[(int)ds_typedef])
8776 else if (decl_context == FIELD
8777 /* C++ allows static class elements. */
8778 && storage_class == sc_static)
8779 /* C++ also allows inlines and signed and unsigned elements,
8780 but in those cases we don't come in here. */
8784 if (decl_context == FIELD)
8785 error ("storage class specified for %qs", name);
8788 if (decl_context == PARM || decl_context == CATCHPARM)
8789 error ("storage class specified for parameter %qs", name);
8791 error ("storage class specified for typename");
8793 if (storage_class == sc_register
8794 || storage_class == sc_auto
8795 || storage_class == sc_extern
8797 storage_class = sc_none;
8800 else if (storage_class == sc_extern && funcdef_flag
8801 && ! toplevel_bindings_p ())
8802 error ("nested function %qs declared %<extern%>", name);
8803 else if (toplevel_bindings_p ())
8805 if (storage_class == sc_auto)
8806 error ("top-level declaration of %qs specifies %<auto%>", name);
8809 && storage_class != sc_extern
8810 && storage_class != sc_static)
8812 error ("function-scope %qs implicitly auto and declared %<__thread%>",
8817 if (storage_class && friendp)
8819 error ("storage class specifiers invalid in friend function declarations");
8820 storage_class = sc_none;
8825 unqualified_id = NULL_TREE;
8828 unqualified_id = id_declarator->u.id.unqualified_name;
8829 switch (TREE_CODE (unqualified_id))
8832 unqualified_id = TREE_OPERAND (unqualified_id, 0);
8833 if (TYPE_P (unqualified_id))
8834 unqualified_id = constructor_name (unqualified_id);
8837 case IDENTIFIER_NODE:
8838 case TEMPLATE_ID_EXPR:
8846 /* Determine the type of the entity declared by recurring on the
8848 for (; declarator; declarator = declarator->declarator)
8850 const cp_declarator *inner_declarator;
8853 if (type == error_mark_node)
8854 return error_mark_node;
8856 attrs = declarator->attributes;
8862 if (declarator == NULL || declarator->kind == cdk_id)
8863 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
8864 if (declarator->kind == cdk_function)
8865 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
8866 if (declarator->kind == cdk_array)
8867 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
8868 returned_attrs = decl_attributes (&type,
8869 chainon (returned_attrs, attrs),
8873 if (declarator->kind == cdk_id)
8876 inner_declarator = declarator->declarator;
8878 switch (declarator->kind)
8881 type = create_array_type_for_decl (dname, type,
8882 declarator->u.array.bounds);
8890 /* Declaring a function type.
8891 Make sure we have a valid type for the function to return. */
8893 if (type_quals != TYPE_UNQUALIFIED)
8895 if (SCALAR_TYPE_P (type) || VOID_TYPE_P (type))
8896 warning (OPT_Wignored_qualifiers,
8897 "type qualifiers ignored on function return type");
8898 /* We now know that the TYPE_QUALS don't apply to the
8899 decl, but to its return type. */
8900 type_quals = TYPE_UNQUALIFIED;
8902 errmsg = targetm.invalid_return_type (type);
8906 type = integer_type_node;
8909 /* Error about some types functions can't return. */
8911 if (TREE_CODE (type) == FUNCTION_TYPE)
8913 error ("%qs declared as function returning a function", name);
8914 return error_mark_node;
8916 if (TREE_CODE (type) == ARRAY_TYPE)
8918 error ("%qs declared as function returning an array", name);
8919 return error_mark_node;
8922 /* Pick up type qualifiers which should be applied to `this'. */
8923 memfn_quals = declarator->u.function.qualifiers;
8924 /* Pick up virt-specifiers. */
8925 virt_specifiers = declarator->u.function.virt_specifiers;
8926 /* Pick up the exception specifications. */
8927 raises = declarator->u.function.exception_specification;
8929 /* Say it's a definition only for the CALL_EXPR
8930 closest to the identifier. */
8931 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
8933 /* Handle a late-specified return type. */
8936 if (type_uses_auto (type))
8938 if (!declarator->u.function.late_return_type)
8940 error ("%qs function uses %<auto%> type specifier without"
8941 " late return type", name);
8942 return error_mark_node;
8944 else if (!is_auto (type))
8946 error ("%qs function with late return type has"
8947 " %qT as its type rather than plain %<auto%>",
8949 return error_mark_node;
8952 else if (declarator->u.function.late_return_type)
8954 error ("%qs function with late return type not declared"
8955 " with %<auto%> type specifier", name);
8956 return error_mark_node;
8959 type = splice_late_return_type
8960 (type, declarator->u.function.late_return_type);
8961 if (type == error_mark_node)
8962 return error_mark_node;
8964 if (ctype == NULL_TREE
8965 && decl_context == FIELD
8967 && (friendp == 0 || dname == current_class_name))
8968 ctype = current_class_type;
8970 if (ctype && (sfk == sfk_constructor
8971 || sfk == sfk_destructor))
8973 /* We are within a class's scope. If our declarator name
8974 is the same as the class name, and we are defining
8975 a function, then it is a constructor/destructor, and
8976 therefore returns a void type. */
8978 /* ISO C++ 12.4/2. A destructor may not be declared
8979 const or volatile. A destructor may not be
8982 ISO C++ 12.1. A constructor may not be declared
8983 const or volatile. A constructor may not be
8984 virtual. A constructor may not be static. */
8986 error ((flags == DTOR_FLAG)
8987 ? "destructor cannot be static member function"
8988 : "constructor cannot be static member function");
8991 error ((flags == DTOR_FLAG)
8992 ? "destructors may not be cv-qualified"
8993 : "constructors may not be cv-qualified");
8994 memfn_quals = TYPE_UNQUALIFIED;
8997 if (decl_context == FIELD
8998 && !member_function_or_else (ctype,
9001 return error_mark_node;
9003 if (flags != DTOR_FLAG)
9005 /* It's a constructor. */
9010 permerror (input_location, "constructors cannot be declared virtual");
9013 if (decl_context == FIELD
9014 && sfk != sfk_constructor)
9015 return error_mark_node;
9017 if (decl_context == FIELD)
9023 error ("can%'t initialize friend function %qs", name);
9026 /* Cannot be both friend and virtual. */
9027 error ("virtual functions cannot be friends");
9030 if (decl_context == NORMAL)
9031 error ("friend declaration not in class definition");
9032 if (current_function_decl && funcdef_flag)
9033 error ("can%'t define friend function %qs in a local "
9037 else if (ctype && sfk == sfk_conversion)
9041 maybe_warn_cpp0x (CPP0X_EXPLICIT_CONVERSION);
9046 arg_types = grokparms (declarator->u.function.parameters,
9049 if (inner_declarator
9050 && inner_declarator->kind == cdk_id
9051 && inner_declarator->u.id.sfk == sfk_destructor
9052 && arg_types != void_list_node)
9054 error ("destructors may not have parameters");
9055 arg_types = void_list_node;
9059 type = build_function_type (type, arg_types);
9066 /* Filter out pointers-to-references and references-to-references.
9067 We can get these if a TYPE_DECL is used. */
9069 if (TREE_CODE (type) == REFERENCE_TYPE)
9071 if (declarator->kind != cdk_reference)
9073 error ("cannot declare pointer to %q#T", type);
9074 type = TREE_TYPE (type);
9077 /* In C++0x, we allow reference to reference declarations
9078 that occur indirectly through typedefs [7.1.3/8 dcl.typedef]
9079 and template type arguments [14.3.1/4 temp.arg.type]. The
9080 check for direct reference to reference declarations, which
9081 are still forbidden, occurs below. Reasoning behind the change
9082 can be found in DR106, DR540, and the rvalue reference
9084 else if (cxx_dialect == cxx98)
9086 error ("cannot declare reference to %q#T", type);
9087 type = TREE_TYPE (type);
9090 else if (VOID_TYPE_P (type))
9092 if (declarator->kind == cdk_reference)
9093 error ("cannot declare reference to %q#T", type);
9094 else if (declarator->kind == cdk_ptrmem)
9095 error ("cannot declare pointer to %q#T member", type);
9098 /* We now know that the TYPE_QUALS don't apply to the decl,
9099 but to the target of the pointer. */
9100 type_quals = TYPE_UNQUALIFIED;
9102 if (declarator->kind == cdk_ptrmem
9103 && (TREE_CODE (type) == FUNCTION_TYPE
9104 || (memfn_quals && TREE_CODE (type) == METHOD_TYPE)))
9106 memfn_quals |= type_memfn_quals (type);
9107 type = build_memfn_type (type,
9108 declarator->u.pointer.class_type,
9110 if (type == error_mark_node)
9111 return error_mark_node;
9112 memfn_quals = TYPE_UNQUALIFIED;
9115 if (TREE_CODE (type) == FUNCTION_TYPE
9116 && type_memfn_quals (type) != TYPE_UNQUALIFIED)
9117 error (declarator->kind == cdk_reference
9118 ? G_("cannot declare reference to qualified function type %qT")
9119 : G_("cannot declare pointer to qualified function type %qT"),
9122 /* When the pointed-to type involves components of variable size,
9123 care must be taken to ensure that the size evaluation code is
9124 emitted early enough to dominate all the possible later uses
9125 and late enough for the variables on which it depends to have
9128 This is expected to happen automatically when the pointed-to
9129 type has a name/declaration of it's own, but special attention
9130 is required if the type is anonymous.
9132 We handle the NORMAL and FIELD contexts here by inserting a
9133 dummy statement that just evaluates the size at a safe point
9134 and ensures it is not deferred until e.g. within a deeper
9135 conditional context (c++/43555).
9137 We expect nothing to be needed here for PARM or TYPENAME.
9138 Evaluating the size at this point for TYPENAME would
9139 actually be incorrect, as we might be in the middle of an
9140 expression with side effects on the pointed-to type size
9141 "arguments" prior to the pointer declaration point and the
9142 size evaluation could end up prior to the side effects. */
9144 if (!TYPE_NAME (type)
9145 && (decl_context == NORMAL || decl_context == FIELD)
9146 && at_function_scope_p ()
9147 && variably_modified_type_p (type, NULL_TREE))
9149 /* First break out any side-effects. */
9150 stabilize_vla_size (TYPE_SIZE (type));
9151 /* And then force evaluation of the SAVE_EXPR. */
9152 finish_expr_stmt (TYPE_SIZE (type));
9155 if (declarator->kind == cdk_reference)
9157 /* In C++0x, the type we are creating a reference to might be
9158 a typedef which is itself a reference type. In that case,
9159 we follow the reference collapsing rules in
9160 [7.1.3/8 dcl.typedef] to create the final reference type:
9162 "If a typedef TD names a type that is a reference to a type
9163 T, an attempt to create the type 'lvalue reference to cv TD'
9164 creates the type 'lvalue reference to T,' while an attempt
9165 to create the type "rvalue reference to cv TD' creates the
9168 if (!VOID_TYPE_P (type))
9169 type = cp_build_reference_type
9170 ((TREE_CODE (type) == REFERENCE_TYPE
9171 ? TREE_TYPE (type) : type),
9172 (declarator->u.reference.rvalue_ref
9173 && (TREE_CODE(type) != REFERENCE_TYPE
9174 || TYPE_REF_IS_RVALUE (type))));
9176 /* In C++0x, we need this check for direct reference to
9177 reference declarations, which are forbidden by
9178 [8.3.2/5 dcl.ref]. Reference to reference declarations
9179 are only allowed indirectly through typedefs and template
9180 type arguments. Example:
9182 void foo(int & &); // invalid ref-to-ref decl
9184 typedef int & int_ref;
9185 void foo(int_ref &); // valid ref-to-ref decl
9187 if (inner_declarator && inner_declarator->kind == cdk_reference)
9188 error ("cannot declare reference to %q#T, which is not "
9189 "a typedef or a template type argument", type);
9191 else if (TREE_CODE (type) == METHOD_TYPE)
9192 type = build_ptrmemfunc_type (build_pointer_type (type));
9193 else if (declarator->kind == cdk_ptrmem)
9195 gcc_assert (TREE_CODE (declarator->u.pointer.class_type)
9197 if (declarator->u.pointer.class_type == error_mark_node)
9198 /* We will already have complained. */
9199 type = error_mark_node;
9201 type = build_ptrmem_type (declarator->u.pointer.class_type,
9205 type = build_pointer_type (type);
9207 /* Process a list of type modifier keywords (such as
9208 const or volatile) that were given inside the `*' or `&'. */
9210 if (declarator->u.pointer.qualifiers)
9213 = cp_build_qualified_type (type,
9214 declarator->u.pointer.qualifiers);
9215 type_quals = cp_type_quals (type);
9228 /* We need to stabilize side-effects in VLA sizes for regular array
9229 declarations too, not just pointers to arrays. */
9230 if (type != error_mark_node && !TYPE_NAME (type)
9231 && (decl_context == NORMAL || decl_context == FIELD)
9232 && at_function_scope_p ()
9233 && variably_modified_type_p (type, NULL_TREE))
9234 stabilize_vla_size (TYPE_SIZE (type));
9236 /* A `constexpr' specifier used in an object declaration declares
9237 the object as `const'. */
9238 if (constexpr_p && innermost_code != cdk_function)
9240 if (type_quals & TYPE_QUAL_CONST)
9241 error ("both %<const%> and %<constexpr%> cannot be used here");
9242 if (type_quals & TYPE_QUAL_VOLATILE)
9243 error ("both %<volatile%> and %<constexpr%> cannot be used here");
9244 type_quals |= TYPE_QUAL_CONST;
9245 type = cp_build_qualified_type (type, type_quals);
9248 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
9249 && TREE_CODE (type) != FUNCTION_TYPE
9250 && TREE_CODE (type) != METHOD_TYPE)
9252 error ("template-id %qD used as a declarator",
9254 unqualified_id = dname;
9257 /* If TYPE is a FUNCTION_TYPE, but the function name was explicitly
9258 qualified with a class-name, turn it into a METHOD_TYPE, unless
9259 we know that the function is static. We take advantage of this
9260 opportunity to do other processing that pertains to entities
9261 explicitly declared to be class members. Note that if DECLARATOR
9262 is non-NULL, we know it is a cdk_id declarator; otherwise, we
9263 would not have exited the loop above. */
9265 && declarator->u.id.qualifying_scope
9266 && TYPE_P (declarator->u.id.qualifying_scope))
9270 ctype = declarator->u.id.qualifying_scope;
9271 ctype = TYPE_MAIN_VARIANT (ctype);
9273 while (t != NULL_TREE && CLASS_TYPE_P (t))
9275 /* You're supposed to have one `template <...>' for every
9276 template class, but you don't need one for a full
9277 specialization. For example:
9279 template <class T> struct S{};
9280 template <> struct S<int> { void f(); };
9281 void S<int>::f () {}
9283 is correct; there shouldn't be a `template <>' for the
9284 definition of `S<int>::f'. */
9285 if (CLASSTYPE_TEMPLATE_SPECIALIZATION (t)
9286 && !any_dependent_template_arguments_p (CLASSTYPE_TI_ARGS (t)))
9287 /* T is an explicit (not partial) specialization. All
9288 containing classes must therefore also be explicitly
9291 if ((CLASSTYPE_USE_TEMPLATE (t) || CLASSTYPE_IS_TEMPLATE (t))
9292 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
9293 template_count += 1;
9295 t = TYPE_MAIN_DECL (t);
9296 t = DECL_CONTEXT (t);
9299 if (ctype == current_class_type)
9303 permerror (input_location, "member functions are implicitly friends of their class");
9307 permerror (declarator->id_loc,
9308 "extra qualification %<%T::%> on member %qs",
9311 else if (/* If the qualifying type is already complete, then we
9312 can skip the following checks. */
9313 !COMPLETE_TYPE_P (ctype)
9314 && (/* If the function is being defined, then
9315 qualifying type must certainly be complete. */
9317 /* A friend declaration of "T::f" is OK, even if
9318 "T" is a template parameter. But, if this
9319 function is not a friend, the qualifying type
9321 || (!friendp && !CLASS_TYPE_P (ctype))
9322 /* For a declaration, the type need not be
9323 complete, if either it is dependent (since there
9324 is no meaningful definition of complete in that
9325 case) or the qualifying class is currently being
9327 || !(dependent_type_p (ctype)
9328 || currently_open_class (ctype)))
9329 /* Check that the qualifying type is complete. */
9330 && !complete_type_or_else (ctype, NULL_TREE))
9331 return error_mark_node;
9332 else if (TREE_CODE (type) == FUNCTION_TYPE)
9334 if (current_class_type
9335 && (!friendp || funcdef_flag))
9338 ? "cannot define member function %<%T::%s%> within %<%T%>"
9339 : "cannot declare member function %<%T::%s%> within %<%T%>",
9340 ctype, name, current_class_type);
9341 return error_mark_node;
9344 else if (declspecs->specs[(int)ds_typedef]
9345 && current_class_type)
9347 error ("cannot declare member %<%T::%s%> within %qT",
9348 ctype, name, current_class_type);
9349 return error_mark_node;
9353 if (ctype == NULL_TREE && decl_context == FIELD && friendp == 0)
9354 ctype = current_class_type;
9356 /* A constexpr non-static member function is implicitly const. */
9357 if (constexpr_p && ctype && staticp == 0
9358 && TREE_CODE (type) == FUNCTION_TYPE
9359 && sfk != sfk_constructor && sfk != sfk_destructor)
9360 memfn_quals |= TYPE_QUAL_CONST;
9362 /* Now TYPE has the actual type. */
9367 *attrlist = chainon (returned_attrs, *attrlist);
9369 attrlist = &returned_attrs;
9372 /* Handle parameter packs. */
9373 if (parameter_pack_p)
9375 if (decl_context == PARM)
9376 /* Turn the type into a pack expansion.*/
9377 type = make_pack_expansion (type);
9379 error ("non-parameter %qs cannot be a parameter pack", name);
9382 /* Did array size calculations overflow? */
9384 if (TREE_CODE (type) == ARRAY_TYPE
9385 && COMPLETE_TYPE_P (type)
9386 && TREE_CODE (TYPE_SIZE_UNIT (type)) == INTEGER_CST
9387 && TREE_OVERFLOW (TYPE_SIZE_UNIT (type)))
9389 error ("size of array %qs is too large", name);
9390 /* If we proceed with the array type as it is, we'll eventually
9391 crash in tree_low_cst(). */
9392 type = error_mark_node;
9395 if ((decl_context == FIELD || decl_context == PARM)
9396 && !processing_template_decl
9397 && variably_modified_type_p (type, NULL_TREE))
9399 if (decl_context == FIELD)
9400 error ("data member may not have variably modified type %qT", type);
9402 error ("parameter may not have variably modified type %qT", type);
9403 type = error_mark_node;
9406 if (explicitp == 1 || (explicitp && friendp))
9408 /* [dcl.fct.spec] The explicit specifier shall only be used in
9409 declarations of constructors within a class definition. */
9410 error ("only declarations of constructors can be %<explicit%>");
9414 if (storage_class == sc_mutable)
9416 if (decl_context != FIELD || friendp)
9418 error ("non-member %qs cannot be declared %<mutable%>", name);
9419 storage_class = sc_none;
9421 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
9423 error ("non-object member %qs cannot be declared %<mutable%>", name);
9424 storage_class = sc_none;
9426 else if (TREE_CODE (type) == FUNCTION_TYPE
9427 || TREE_CODE (type) == METHOD_TYPE)
9429 error ("function %qs cannot be declared %<mutable%>", name);
9430 storage_class = sc_none;
9434 error ("static %qs cannot be declared %<mutable%>", name);
9435 storage_class = sc_none;
9437 else if (type_quals & TYPE_QUAL_CONST)
9439 error ("const %qs cannot be declared %<mutable%>", name);
9440 storage_class = sc_none;
9442 else if (TREE_CODE (type) == REFERENCE_TYPE)
9444 permerror (input_location, "reference %qs cannot be declared "
9445 "%<mutable%>", name);
9446 storage_class = sc_none;
9450 /* If this is declaring a typedef name, return a TYPE_DECL. */
9451 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
9455 /* Note that the grammar rejects storage classes
9456 in typenames, fields or parameters. */
9457 if (current_lang_name == lang_name_java)
9458 TYPE_FOR_JAVA (type) = 1;
9460 /* This declaration:
9462 typedef void f(int) const;
9464 declares a function type which is not a member of any
9465 particular class, but which is cv-qualified; for
9466 example "f S::*" declares a pointer to a const-qualified
9467 member function of S. We record the cv-qualification in the
9469 if (memfn_quals && TREE_CODE (type) == FUNCTION_TYPE)
9471 type = apply_memfn_quals (type, memfn_quals);
9473 /* We have now dealt with these qualifiers. */
9474 memfn_quals = TYPE_UNQUALIFIED;
9477 if (decl_context == FIELD)
9478 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
9480 decl = build_decl (input_location, TYPE_DECL, unqualified_id, type);
9481 if (id_declarator && declarator->u.id.qualifying_scope) {
9482 error_at (DECL_SOURCE_LOCATION (decl),
9483 "typedef name may not be a nested-name-specifier");
9484 TREE_TYPE (decl) = error_mark_node;
9487 if (decl_context != FIELD)
9489 if (!current_function_decl)
9490 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
9491 else if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (current_function_decl)
9492 || (DECL_MAYBE_IN_CHARGE_DESTRUCTOR_P
9493 (current_function_decl)))
9494 /* The TYPE_DECL is "abstract" because there will be
9495 clones of this constructor/destructor, and there will
9496 be copies of this TYPE_DECL generated in those
9498 DECL_ABSTRACT (decl) = 1;
9500 else if (constructor_name_p (unqualified_id, current_class_type))
9501 permerror (input_location, "ISO C++ forbids nested type %qD with same name "
9502 "as enclosing class",
9505 /* If the user declares "typedef struct {...} foo" then the
9506 struct will have an anonymous name. Fill that name in now.
9507 Nothing can refer to it, so nothing needs know about the name
9509 if (type != error_mark_node
9512 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
9513 && TYPE_ANONYMOUS_P (type)
9514 && cp_type_quals (type) == TYPE_UNQUALIFIED)
9518 /* Replace the anonymous name with the real name everywhere. */
9519 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
9521 if (ANON_AGGRNAME_P (TYPE_IDENTIFIER (t)))
9522 /* We do not rename the debug info representing the
9523 anonymous tagged type because the standard says in
9524 [dcl.typedef] that the naming applies only for
9525 linkage purposes. */
9526 /*debug_hooks->set_name (t, decl);*/
9527 TYPE_NAME (t) = decl;
9530 if (TYPE_LANG_SPECIFIC (type))
9531 TYPE_WAS_ANONYMOUS (type) = 1;
9533 /* If this is a typedef within a template class, the nested
9534 type is a (non-primary) template. The name for the
9535 template needs updating as well. */
9536 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
9537 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
9538 = TYPE_IDENTIFIER (type);
9540 /* Adjust linkage now that we aren't anonymous anymore. */
9541 set_linkage_according_to_type (type, TYPE_MAIN_DECL (type));
9542 determine_visibility (TYPE_MAIN_DECL (type));
9544 /* FIXME remangle member functions; member functions of a
9545 type with external linkage have external linkage. */
9549 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
9550 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
9552 bad_specifiers (decl, BSP_TYPE, virtualp,
9553 memfn_quals != TYPE_UNQUALIFIED,
9554 inlinep, friendp, raises != NULL_TREE);
9559 /* Detect the case of an array type of unspecified size
9560 which came, as such, direct from a typedef name.
9561 We must copy the type, so that the array's domain can be
9562 individually set by the object's initializer. */
9564 if (type && typedef_type
9565 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
9566 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
9567 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
9569 /* Detect where we're using a typedef of function type to declare a
9570 function. PARMS will not be set, so we must create it now. */
9572 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
9574 tree decls = NULL_TREE;
9577 for (args = TYPE_ARG_TYPES (type);
9578 args && args != void_list_node;
9579 args = TREE_CHAIN (args))
9581 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
9583 DECL_CHAIN (decl) = decls;
9587 parms = nreverse (decls);
9589 if (decl_context != TYPENAME)
9591 /* A cv-qualifier-seq shall only be part of the function type
9592 for a non-static member function. [8.3.5/4 dcl.fct] */
9593 if (type_memfn_quals (type) != TYPE_UNQUALIFIED
9594 && (current_class_type == NULL_TREE || staticp) )
9597 ? G_("qualified function types cannot be used to "
9598 "declare static member functions")
9599 : G_("qualified function types cannot be used to "
9600 "declare free functions"));
9601 type = TYPE_MAIN_VARIANT (type);
9604 /* The qualifiers on the function type become the qualifiers on
9605 the non-static member function. */
9606 memfn_quals |= type_memfn_quals (type);
9607 type_quals = TYPE_UNQUALIFIED;
9611 /* If this is a type name (such as, in a cast or sizeof),
9612 compute the type and return it now. */
9614 if (decl_context == TYPENAME)
9616 /* Note that the grammar rejects storage classes
9617 in typenames, fields or parameters. */
9618 if (type_quals != TYPE_UNQUALIFIED)
9619 type_quals = TYPE_UNQUALIFIED;
9621 /* Special case: "friend class foo" looks like a TYPENAME context. */
9624 if (type_quals != TYPE_UNQUALIFIED)
9626 error ("type qualifiers specified for friend class declaration");
9627 type_quals = TYPE_UNQUALIFIED;
9631 error ("%<inline%> specified for friend class declaration");
9637 /* Don't allow friend declaration without a class-key. */
9638 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
9639 permerror (input_location, "template parameters cannot be friends");
9640 else if (TREE_CODE (type) == TYPENAME_TYPE)
9641 permerror (input_location, "friend declaration requires class-key, "
9642 "i.e. %<friend class %T::%D%>",
9643 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
9645 permerror (input_location, "friend declaration requires class-key, "
9646 "i.e. %<friend %#T%>",
9650 /* Only try to do this stuff if we didn't already give up. */
9651 if (type != integer_type_node)
9653 /* A friendly class? */
9654 if (current_class_type)
9655 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
9658 error ("trying to make class %qT a friend of global scope",
9661 type = void_type_node;
9664 else if (memfn_quals)
9666 if (ctype == NULL_TREE
9667 && TREE_CODE (type) == METHOD_TYPE)
9668 ctype = TYPE_METHOD_BASETYPE (type);
9671 type = build_memfn_type (type, ctype, memfn_quals);
9672 /* Core issue #547: need to allow this in template type args. */
9673 else if (template_type_arg && TREE_CODE (type) == FUNCTION_TYPE)
9674 type = apply_memfn_quals (type, memfn_quals);
9676 error ("invalid qualifiers on non-member function type");
9681 else if (unqualified_id == NULL_TREE && decl_context != PARM
9682 && decl_context != CATCHPARM
9683 && TREE_CODE (type) != UNION_TYPE
9686 error ("abstract declarator %qT used as declaration", type);
9687 return error_mark_node;
9690 /* Only functions may be declared using an operator-function-id. */
9692 && IDENTIFIER_OPNAME_P (unqualified_id)
9693 && TREE_CODE (type) != FUNCTION_TYPE
9694 && TREE_CODE (type) != METHOD_TYPE)
9696 error ("declaration of %qD as non-function", unqualified_id);
9697 return error_mark_node;
9700 /* We don't check parameter types here because we can emit a better
9701 error message later. */
9702 if (decl_context != PARM)
9704 type = check_var_type (unqualified_id, type);
9705 if (type == error_mark_node)
9706 return error_mark_node;
9709 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
9710 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
9712 if (decl_context == PARM || decl_context == CATCHPARM)
9714 if (ctype || in_namespace)
9715 error ("cannot use %<::%> in parameter declaration");
9717 /* A parameter declared as an array of T is really a pointer to T.
9718 One declared as a function is really a pointer to a function.
9719 One declared as a member is really a pointer to member. */
9721 if (TREE_CODE (type) == ARRAY_TYPE)
9723 /* Transfer const-ness of array into that of type pointed to. */
9724 type = build_pointer_type (TREE_TYPE (type));
9725 type_quals = TYPE_UNQUALIFIED;
9727 else if (TREE_CODE (type) == FUNCTION_TYPE)
9728 type = build_pointer_type (type);
9731 if (ctype && TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
9732 && !NEW_DELETE_OPNAME_P (unqualified_id))
9733 type = build_memfn_type (type, ctype, memfn_quals);
9738 if (decl_context == PARM)
9740 decl = cp_build_parm_decl (unqualified_id, type);
9742 bad_specifiers (decl, BSP_PARM, virtualp,
9743 memfn_quals != TYPE_UNQUALIFIED,
9744 inlinep, friendp, raises != NULL_TREE);
9746 else if (decl_context == FIELD)
9748 /* The C99 flexible array extension. */
9749 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
9750 && TYPE_DOMAIN (type) == NULL_TREE)
9752 tree itype = compute_array_index_type (dname, integer_zero_node,
9753 tf_warning_or_error);
9754 type = build_cplus_array_type (TREE_TYPE (type), itype);
9757 if (type == error_mark_node)
9759 /* Happens when declaring arrays of sizes which
9760 are error_mark_node, for example. */
9763 else if (in_namespace && !friendp)
9765 /* Something like struct S { int N::j; }; */
9766 error ("invalid use of %<::%>");
9767 return error_mark_node;
9769 else if (TREE_CODE (type) == FUNCTION_TYPE
9770 || TREE_CODE (type) == METHOD_TYPE)
9773 tree function_context;
9777 /* This should never happen in pure C++ (the check
9778 could be an assert). It could happen in
9779 Objective-C++ if someone writes invalid code that
9780 uses a function declaration for an instance
9781 variable or property (instance variables and
9782 properties are parsed as FIELD_DECLs, but they are
9783 part of an Objective-C class, not a C++ class).
9784 That code is invalid and is caught by this
9788 error ("declaration of function %qD in invalid context",
9790 return error_mark_node;
9793 /* ``A union may [ ... ] not [ have ] virtual functions.''
9795 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
9797 error ("function %qD declared virtual inside a union",
9799 return error_mark_node;
9802 if (NEW_DELETE_OPNAME_P (unqualified_id))
9806 error ("%qD cannot be declared virtual, since it "
9814 /* Check that the name used for a destructor makes sense. */
9815 if (sfk == sfk_destructor)
9817 tree uqname = id_declarator->u.id.unqualified_name;
9821 gcc_assert (friendp);
9822 error ("expected qualified name in friend declaration "
9823 "for destructor %qD", uqname);
9824 return error_mark_node;
9827 if (!check_dtor_name (ctype, TREE_OPERAND (uqname, 0)))
9829 error ("declaration of %qD as member of %qT",
9831 return error_mark_node;
9835 error ("a destructor cannot be %<constexpr%>");
9836 return error_mark_node;
9839 else if (sfk == sfk_constructor && friendp && !ctype)
9841 error ("expected qualified name in friend declaration "
9842 "for constructor %qD",
9843 id_declarator->u.id.unqualified_name);
9844 return error_mark_node;
9847 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
9848 function_context = (ctype != NULL_TREE) ?
9849 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
9850 publicp = (! friendp || ! staticp)
9851 && function_context == NULL_TREE;
9852 decl = grokfndecl (ctype, type,
9853 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
9854 ? unqualified_id : dname,
9857 virtualp, flags, memfn_quals, raises,
9858 friendp ? -1 : 0, friendp, publicp,
9859 inlinep | (2 * constexpr_p),
9861 funcdef_flag, template_count, in_namespace,
9862 attrlist, declarator->id_loc);
9863 decl = set_virt_specifiers (decl, virt_specifiers);
9864 if (decl == NULL_TREE)
9865 return error_mark_node;
9867 /* This clobbers the attrs stored in `decl' from `attrlist'. */
9868 /* The decl and setting of decl_attr is also turned off. */
9869 decl = build_decl_attribute_variant (decl, decl_attr);
9872 /* [class.conv.ctor]
9874 A constructor declared without the function-specifier
9875 explicit that can be called with a single parameter
9876 specifies a conversion from the type of its first
9877 parameter to the type of its class. Such a constructor
9878 is called a converting constructor. */
9880 DECL_NONCONVERTING_P (decl) = 1;
9882 else if (!staticp && !dependent_type_p (type)
9883 && !COMPLETE_TYPE_P (complete_type (type))
9884 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
9887 error ("field %qD has incomplete type", unqualified_id);
9889 error ("name %qT has incomplete type", type);
9891 /* If we're instantiating a template, tell them which
9892 instantiation made the field's type be incomplete. */
9893 if (current_class_type
9894 && TYPE_NAME (current_class_type)
9895 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
9897 && declspecs->type == type)
9898 error (" in instantiation of template %qT",
9899 current_class_type);
9901 return error_mark_node;
9907 error ("%qE is neither function nor member function; "
9908 "cannot be declared friend", unqualified_id);
9916 /* Friends are treated specially. */
9917 if (ctype == current_class_type)
9918 ; /* We already issued a permerror. */
9919 else if (decl && DECL_NAME (decl))
9921 if (template_class_depth (current_class_type) == 0)
9923 decl = check_explicit_specialization
9924 (unqualified_id, decl, template_count,
9925 2 * funcdef_flag + 4);
9926 if (decl == error_mark_node)
9927 return error_mark_node;
9930 decl = do_friend (ctype, unqualified_id, decl,
9936 return error_mark_node;
9939 /* Structure field. It may not be a function, except for C++. */
9941 if (decl == NULL_TREE)
9947 /* An attempt is being made to initialize a non-static
9948 member. But, from [class.mem]:
9950 4 A member-declarator can contain a
9951 constant-initializer only if it declares a static
9952 member (_class.static_) of integral or enumeration
9953 type, see _class.static.data_.
9955 This used to be relatively common practice, but
9956 the rest of the compiler does not correctly
9957 handle the initialization unless the member is
9958 static so we make it static below. */
9959 if (cxx_dialect >= cxx0x)
9961 sorry ("non-static data member initializers");
9965 permerror (input_location, "ISO C++ forbids initialization of member %qD",
9967 permerror (input_location, "making %qD static", unqualified_id);
9972 if (uses_template_parms (type))
9973 /* We'll check at instantiation time. */
9975 else if (constexpr_p)
9976 /* constexpr has the same requirements. */
9978 else if (check_static_variable_definition (unqualified_id,
9980 /* If we just return the declaration, crashes
9981 will sometimes occur. We therefore return
9982 void_type_node, as if this was a friend
9983 declaration, to cause callers to completely
9984 ignore this declaration. */
9985 return error_mark_node;
9990 /* C++ allows static class members. All other work
9991 for this is done by grokfield. */
9992 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
9993 set_linkage_for_static_data_member (decl);
9994 /* Even if there is an in-class initialization, DECL
9995 is considered undefined until an out-of-class
9996 definition is provided. */
9997 DECL_EXTERNAL (decl) = 1;
10000 DECL_TLS_MODEL (decl) = decl_default_tls_model (decl);
10002 if (constexpr_p && !initialized)
10004 error ("constexpr static data member %qD must have an "
10005 "initializer", decl);
10006 constexpr_p = false;
10013 error ("non-static data member %qE declared %<constexpr%>",
10015 constexpr_p = false;
10017 decl = build_decl (input_location,
10018 FIELD_DECL, unqualified_id, type);
10019 DECL_NONADDRESSABLE_P (decl) = bitfield;
10020 if (bitfield && !unqualified_id)
10021 TREE_NO_WARNING (decl) = 1;
10023 if (storage_class == sc_mutable)
10025 DECL_MUTABLE_P (decl) = 1;
10026 storage_class = sc_none;
10030 bad_specifiers (decl, BSP_FIELD, virtualp,
10031 memfn_quals != TYPE_UNQUALIFIED,
10032 inlinep, friendp, raises != NULL_TREE);
10035 else if (TREE_CODE (type) == FUNCTION_TYPE
10036 || TREE_CODE (type) == METHOD_TYPE)
10038 tree original_name;
10041 if (!unqualified_id)
10042 return error_mark_node;
10044 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
10045 original_name = dname;
10047 original_name = unqualified_id;
10049 if (storage_class == sc_auto)
10050 error ("storage class %<auto%> invalid for function %qs", name);
10051 else if (storage_class == sc_register)
10052 error ("storage class %<register%> invalid for function %qs", name);
10054 error ("storage class %<__thread%> invalid for function %qs", name);
10056 if (virt_specifiers)
10057 error ("virt-specifiers in %qs not allowed outside a class definition", name);
10058 /* Function declaration not at top level.
10059 Storage classes other than `extern' are not allowed
10060 and `extern' makes no difference. */
10061 if (! toplevel_bindings_p ()
10062 && (storage_class == sc_static
10063 || declspecs->specs[(int)ds_inline])
10066 if (storage_class == sc_static)
10067 pedwarn (input_location, OPT_pedantic,
10068 "%<static%> specified invalid for function %qs "
10069 "declared out of global scope", name);
10071 pedwarn (input_location, OPT_pedantic,
10072 "%<inline%> specifier invalid for function %qs "
10073 "declared out of global scope", name);
10076 if (ctype != NULL_TREE
10077 && TREE_CODE (ctype) != NAMESPACE_DECL && !MAYBE_CLASS_TYPE_P (ctype))
10079 error ("%q#T is not a class or a namespace", ctype);
10083 if (ctype == NULL_TREE)
10087 error ("virtual non-class function %qs", name);
10090 else if (sfk == sfk_constructor
10091 || sfk == sfk_destructor)
10093 error (funcdef_flag
10094 ? "%qs defined in a non-class scope"
10095 : "%qs declared in a non-class scope", name);
10100 /* Record presence of `static'. */
10101 publicp = (ctype != NULL_TREE
10102 || storage_class == sc_extern
10103 || storage_class != sc_static);
10105 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
10106 virtualp, flags, memfn_quals, raises,
10108 publicp, inlinep | (2 * constexpr_p), sfk,
10110 template_count, in_namespace, attrlist,
10111 declarator->id_loc);
10112 if (decl == NULL_TREE)
10113 return error_mark_node;
10117 int invalid_static = 0;
10119 /* Don't allow a static member function in a class, and forbid
10120 declaring main to be static. */
10121 if (TREE_CODE (type) == METHOD_TYPE)
10123 permerror (input_location, "cannot declare member function %qD to have "
10124 "static linkage", decl);
10125 invalid_static = 1;
10127 else if (current_function_decl)
10129 /* FIXME need arm citation */
10130 error ("cannot declare static function inside another function");
10131 invalid_static = 1;
10134 if (invalid_static)
10137 storage_class = sc_none;
10143 /* It's a variable. */
10145 /* An uninitialized decl with `extern' is a reference. */
10146 decl = grokvardecl (type, unqualified_id,
10149 (type_quals & TYPE_QUAL_CONST) != 0,
10150 ctype ? ctype : in_namespace);
10151 bad_specifiers (decl, BSP_VAR, virtualp,
10152 memfn_quals != TYPE_UNQUALIFIED,
10153 inlinep, friendp, raises != NULL_TREE);
10157 DECL_CONTEXT (decl) = ctype;
10160 permerror (input_location, "%<static%> may not be used when defining "
10161 "(as opposed to declaring) a static data member");
10163 storage_class = sc_none;
10165 if (storage_class == sc_register && TREE_STATIC (decl))
10167 error ("static member %qD declared %<register%>", decl);
10168 storage_class = sc_none;
10170 if (storage_class == sc_extern && pedantic)
10172 pedwarn (input_location, OPT_pedantic,
10173 "cannot explicitly declare member %q#D to have "
10174 "extern linkage", decl);
10175 storage_class = sc_none;
10178 else if (constexpr_p && DECL_EXTERNAL (decl))
10180 error ("declaration of constexpr variable %qD is not a definition",
10182 constexpr_p = false;
10186 if (storage_class == sc_extern && initialized && !funcdef_flag)
10188 if (toplevel_bindings_p ())
10190 /* It's common practice (and completely valid) to have a const
10191 be initialized and declared extern. */
10192 if (!(type_quals & TYPE_QUAL_CONST))
10193 warning (0, "%qs initialized and declared %<extern%>", name);
10197 error ("%qs has both %<extern%> and initializer", name);
10198 return error_mark_node;
10202 /* Record `register' declaration for warnings on &
10203 and in case doing stupid register allocation. */
10205 if (storage_class == sc_register)
10206 DECL_REGISTER (decl) = 1;
10207 else if (storage_class == sc_extern)
10208 DECL_THIS_EXTERN (decl) = 1;
10209 else if (storage_class == sc_static)
10210 DECL_THIS_STATIC (decl) = 1;
10212 /* Set constexpr flag on vars (functions got it in grokfndecl). */
10213 if (constexpr_p && TREE_CODE (decl) == VAR_DECL)
10214 DECL_DECLARED_CONSTEXPR_P (decl) = true;
10216 /* Record constancy and volatility on the DECL itself . There's
10217 no need to do this when processing a template; we'll do this
10218 for the instantiated declaration based on the type of DECL. */
10219 if (!processing_template_decl)
10220 cp_apply_type_quals_to_decl (type_quals, decl);
10226 /* Subroutine of start_function. Ensure that each of the parameter
10227 types (as listed in PARMS) is complete, as is required for a
10228 function definition. */
10231 require_complete_types_for_parms (tree parms)
10233 for (; parms; parms = DECL_CHAIN (parms))
10235 if (dependent_type_p (TREE_TYPE (parms)))
10237 if (!VOID_TYPE_P (TREE_TYPE (parms))
10238 && complete_type_or_else (TREE_TYPE (parms), parms))
10240 relayout_decl (parms);
10241 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
10244 /* grokparms or complete_type_or_else will have already issued
10246 TREE_TYPE (parms) = error_mark_node;
10250 /* Returns nonzero if T is a local variable. */
10253 local_variable_p (const_tree t)
10255 if ((TREE_CODE (t) == VAR_DECL
10256 /* A VAR_DECL with a context that is a _TYPE is a static data
10258 && !TYPE_P (CP_DECL_CONTEXT (t))
10259 /* Any other non-local variable must be at namespace scope. */
10260 && !DECL_NAMESPACE_SCOPE_P (t))
10261 || (TREE_CODE (t) == PARM_DECL))
10267 /* Like local_variable_p, but suitable for use as a tree-walking
10271 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
10272 void *data ATTRIBUTE_UNUSED)
10274 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
10276 else if (TYPE_P (*tp))
10277 *walk_subtrees = 0;
10283 /* Check that ARG, which is a default-argument expression for a
10284 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
10285 something goes wrong. DECL may also be a _TYPE node, rather than a
10286 DECL, if there is no DECL available. */
10289 check_default_argument (tree decl, tree arg)
10294 if (TREE_CODE (arg) == DEFAULT_ARG)
10295 /* We get a DEFAULT_ARG when looking at an in-class declaration
10296 with a default argument. Ignore the argument for now; we'll
10297 deal with it after the class is complete. */
10306 decl_type = TREE_TYPE (decl);
10308 if (arg == error_mark_node
10309 || decl == error_mark_node
10310 || TREE_TYPE (arg) == error_mark_node
10311 || decl_type == error_mark_node)
10312 /* Something already went wrong. There's no need to check
10314 return error_mark_node;
10316 /* [dcl.fct.default]
10318 A default argument expression is implicitly converted to the
10320 if (!TREE_TYPE (arg)
10321 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg, LOOKUP_NORMAL))
10324 error ("default argument for %q#D has type %qT",
10325 decl, TREE_TYPE (arg));
10327 error ("default argument for parameter of type %qT has type %qT",
10328 decl_type, TREE_TYPE (arg));
10330 return error_mark_node;
10333 /* [dcl.fct.default]
10335 Local variables shall not be used in default argument
10338 The keyword `this' shall not be used in a default argument of a
10339 member function. */
10340 var = cp_walk_tree_without_duplicates (&arg, local_variable_p_walkfn, NULL);
10343 error ("default argument %qE uses local variable %qD", arg, var);
10344 return error_mark_node;
10351 /* Returns a deprecated type used within TYPE, or NULL_TREE if none. */
10354 type_is_deprecated (tree type)
10356 enum tree_code code;
10357 if (TREE_DEPRECATED (type))
10359 if (TYPE_NAME (type)
10360 && TREE_DEPRECATED (TYPE_NAME (type)))
10363 /* Do warn about using typedefs to a deprecated class. */
10364 if (TAGGED_TYPE_P (type) && type != TYPE_MAIN_VARIANT (type))
10365 return type_is_deprecated (TYPE_MAIN_VARIANT (type));
10367 code = TREE_CODE (type);
10369 if (code == POINTER_TYPE || code == REFERENCE_TYPE
10370 || code == OFFSET_TYPE || code == FUNCTION_TYPE
10371 || code == METHOD_TYPE || code == ARRAY_TYPE)
10372 return type_is_deprecated (TREE_TYPE (type));
10374 if (TYPE_PTRMEMFUNC_P (type))
10375 return type_is_deprecated
10376 (TREE_TYPE (TREE_TYPE (TYPE_PTRMEMFUNC_FN_TYPE (type))));
10381 /* Decode the list of parameter types for a function type.
10382 Given the list of things declared inside the parens,
10383 return a list of types.
10385 If this parameter does not end with an ellipsis, we append
10388 *PARMS is set to the chain of PARM_DECLs created. */
10391 grokparms (tree parmlist, tree *parms)
10393 tree result = NULL_TREE;
10394 tree decls = NULL_TREE;
10398 for (parm = parmlist; parm != NULL_TREE; parm = TREE_CHAIN (parm))
10400 tree type = NULL_TREE;
10401 tree init = TREE_PURPOSE (parm);
10402 tree decl = TREE_VALUE (parm);
10403 const char *errmsg;
10405 if (parm == void_list_node)
10408 if (! decl || TREE_TYPE (decl) == error_mark_node)
10411 type = TREE_TYPE (decl);
10412 if (VOID_TYPE_P (type))
10414 if (same_type_p (type, void_type_node)
10415 && DECL_SELF_REFERENCE_P (type)
10416 && !DECL_NAME (decl) && !result && TREE_CHAIN (parm) == void_list_node)
10417 /* this is a parmlist of `(void)', which is ok. */
10419 cxx_incomplete_type_error (decl, type);
10420 /* It's not a good idea to actually create parameters of
10421 type `void'; other parts of the compiler assume that a
10422 void type terminates the parameter list. */
10423 type = error_mark_node;
10424 TREE_TYPE (decl) = error_mark_node;
10427 if (type != error_mark_node
10428 && TYPE_FOR_JAVA (type)
10429 && MAYBE_CLASS_TYPE_P (type))
10431 error ("parameter %qD has Java class type", decl);
10432 type = error_mark_node;
10433 TREE_TYPE (decl) = error_mark_node;
10437 if (type != error_mark_node
10438 && (errmsg = targetm.invalid_parameter_type (type)))
10441 type = error_mark_node;
10442 TREE_TYPE (decl) = error_mark_node;
10445 if (type != error_mark_node)
10447 if (deprecated_state != DEPRECATED_SUPPRESS)
10449 tree deptype = type_is_deprecated (type);
10451 warn_deprecated_use (deptype, NULL_TREE);
10454 /* Top-level qualifiers on the parameters are
10455 ignored for function types. */
10456 type = cp_build_qualified_type (type, 0);
10457 if (TREE_CODE (type) == METHOD_TYPE)
10459 error ("parameter %qD invalidly declared method type", decl);
10460 type = build_pointer_type (type);
10461 TREE_TYPE (decl) = type;
10463 else if (abstract_virtuals_error (decl, type))
10464 any_error = 1; /* Seems like a good idea. */
10465 else if (POINTER_TYPE_P (type))
10467 /* [dcl.fct]/6, parameter types cannot contain pointers
10468 (references) to arrays of unknown bound. */
10469 tree t = TREE_TYPE (type);
10470 int ptr = TYPE_PTR_P (type);
10474 if (TYPE_PTR_P (t))
10476 else if (TREE_CODE (t) != ARRAY_TYPE)
10478 else if (!TYPE_DOMAIN (t))
10482 if (TREE_CODE (t) == ARRAY_TYPE)
10484 ? G_("parameter %qD includes pointer to array of "
10485 "unknown bound %qT")
10486 : G_("parameter %qD includes reference to array of "
10487 "unknown bound %qT"),
10493 else if (init && !processing_template_decl)
10494 init = check_default_argument (decl, init);
10497 if (TREE_CODE (decl) == PARM_DECL
10498 && FUNCTION_PARAMETER_PACK_P (decl)
10499 && TREE_CHAIN (parm)
10500 && TREE_CHAIN (parm) != void_list_node)
10501 error ("parameter packs must be at the end of the parameter list");
10503 DECL_CHAIN (decl) = decls;
10505 result = tree_cons (init, type, result);
10507 decls = nreverse (decls);
10508 result = nreverse (result);
10510 result = chainon (result, void_list_node);
10517 /* D is a constructor or overloaded `operator='.
10519 Let T be the class in which D is declared. Then, this function
10522 -1 if D's is an ill-formed constructor or copy assignment operator
10523 whose first parameter is of type `T'.
10524 0 if D is not a copy constructor or copy assignment
10526 1 if D is a copy constructor or copy assignment operator whose
10527 first parameter is a reference to non-const qualified T.
10528 2 if D is a copy constructor or copy assignment operator whose
10529 first parameter is a reference to const qualified T.
10531 This function can be used as a predicate. Positive values indicate
10532 a copy constructor and nonzero values indicate a copy assignment
10536 copy_fn_p (const_tree d)
10542 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
10544 if (TREE_CODE (d) == TEMPLATE_DECL
10545 || (DECL_TEMPLATE_INFO (d)
10546 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
10547 /* Instantiations of template member functions are never copy
10548 functions. Note that member functions of templated classes are
10549 represented as template functions internally, and we must
10550 accept those as copy functions. */
10553 args = FUNCTION_FIRST_USER_PARMTYPE (d);
10557 arg_type = TREE_VALUE (args);
10558 if (arg_type == error_mark_node)
10561 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
10563 /* Pass by value copy assignment operator. */
10566 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
10567 && !TYPE_REF_IS_RVALUE (arg_type)
10568 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
10570 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
10576 args = TREE_CHAIN (args);
10578 if (args && args != void_list_node && !TREE_PURPOSE (args))
10579 /* There are more non-optional args. */
10585 /* D is a constructor or overloaded `operator='.
10587 Let T be the class in which D is declared. Then, this function
10588 returns true when D is a move constructor or move assignment
10589 operator, false otherwise. */
10592 move_fn_p (const_tree d)
10596 bool result = false;
10598 gcc_assert (DECL_FUNCTION_MEMBER_P (d));
10600 if (cxx_dialect == cxx98)
10601 /* There are no move constructors if we are in C++98 mode. */
10604 if (TREE_CODE (d) == TEMPLATE_DECL
10605 || (DECL_TEMPLATE_INFO (d)
10606 && DECL_MEMBER_TEMPLATE_P (DECL_TI_TEMPLATE (d))))
10607 /* Instantiations of template member functions are never copy
10608 functions. Note that member functions of templated classes are
10609 represented as template functions internally, and we must
10610 accept those as copy functions. */
10613 args = FUNCTION_FIRST_USER_PARMTYPE (d);
10617 arg_type = TREE_VALUE (args);
10618 if (arg_type == error_mark_node)
10621 if (TREE_CODE (arg_type) == REFERENCE_TYPE
10622 && TYPE_REF_IS_RVALUE (arg_type)
10623 && same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)),
10627 args = TREE_CHAIN (args);
10629 if (args && args != void_list_node && !TREE_PURPOSE (args))
10630 /* There are more non-optional args. */
10636 /* Remember any special properties of member function DECL. */
10639 grok_special_member_properties (tree decl)
10643 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P (decl))
10646 class_type = DECL_CONTEXT (decl);
10647 if (DECL_CONSTRUCTOR_P (decl))
10649 int ctor = copy_fn_p (decl);
10651 if (!DECL_ARTIFICIAL (decl))
10652 TYPE_HAS_USER_CONSTRUCTOR (class_type) = 1;
10658 A non-template constructor for class X is a copy
10659 constructor if its first parameter is of type X&, const
10660 X&, volatile X& or const volatile X&, and either there
10661 are no other parameters or else all other parameters have
10662 default arguments. */
10663 TYPE_HAS_COPY_CTOR (class_type) = 1;
10664 if (user_provided_p (decl))
10665 TYPE_HAS_COMPLEX_COPY_CTOR (class_type) = 1;
10667 TYPE_HAS_CONST_COPY_CTOR (class_type) = 1;
10669 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
10671 TYPE_HAS_DEFAULT_CONSTRUCTOR (class_type) = 1;
10672 if (user_provided_p (decl))
10673 TYPE_HAS_COMPLEX_DFLT (class_type) = 1;
10675 else if (move_fn_p (decl) && user_provided_p (decl))
10676 TYPE_HAS_COMPLEX_MOVE_CTOR (class_type) = 1;
10677 else if (is_list_ctor (decl))
10678 TYPE_HAS_LIST_CTOR (class_type) = 1;
10680 if (DECL_DECLARED_CONSTEXPR_P (decl)
10681 && !copy_fn_p (decl) && !move_fn_p (decl))
10682 TYPE_HAS_CONSTEXPR_CTOR (class_type) = 1;
10684 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
10688 A non-template assignment operator for class X is a copy
10689 assignment operator if its parameter is of type X, X&, const
10690 X&, volatile X& or const volatile X&. */
10692 int assop = copy_fn_p (decl);
10696 TYPE_HAS_COPY_ASSIGN (class_type) = 1;
10697 if (user_provided_p (decl))
10698 TYPE_HAS_COMPLEX_COPY_ASSIGN (class_type) = 1;
10700 TYPE_HAS_CONST_COPY_ASSIGN (class_type) = 1;
10702 else if (move_fn_p (decl) && user_provided_p (decl))
10703 TYPE_HAS_COMPLEX_MOVE_ASSIGN (class_type) = 1;
10705 /* Destructors are handled in check_methods. */
10708 /* Check a constructor DECL has the correct form. Complains
10709 if the class has a constructor of the form X(X). */
10712 grok_ctor_properties (const_tree ctype, const_tree decl)
10714 int ctor_parm = copy_fn_p (decl);
10720 A declaration of a constructor for a class X is ill-formed if
10721 its first parameter is of type (optionally cv-qualified) X
10722 and either there are no other parameters or else all other
10723 parameters have default arguments.
10725 We *don't* complain about member template instantiations that
10726 have this form, though; they can occur as we try to decide
10727 what constructor to use during overload resolution. Since
10728 overload resolution will never prefer such a constructor to
10729 the non-template copy constructor (which is either explicitly
10730 or implicitly defined), there's no need to worry about their
10731 existence. Theoretically, they should never even be
10732 instantiated, but that's hard to forestall. */
10733 error ("invalid constructor; you probably meant %<%T (const %T&)%>",
10741 /* An operator with this code is unary, but can also be binary. */
10744 ambi_op_p (enum tree_code code)
10746 return (code == INDIRECT_REF
10747 || code == ADDR_EXPR
10748 || code == UNARY_PLUS_EXPR
10749 || code == NEGATE_EXPR
10750 || code == PREINCREMENT_EXPR
10751 || code == PREDECREMENT_EXPR);
10754 /* An operator with this name can only be unary. */
10757 unary_op_p (enum tree_code code)
10759 return (code == TRUTH_NOT_EXPR
10760 || code == BIT_NOT_EXPR
10761 || code == COMPONENT_REF
10762 || code == TYPE_EXPR);
10765 /* DECL is a declaration for an overloaded operator. If COMPLAIN is true,
10766 errors are issued for invalid declarations. */
10769 grok_op_properties (tree decl, bool complain)
10771 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
10773 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
10774 tree name = DECL_NAME (decl);
10775 enum tree_code operator_code;
10780 /* Count the number of arguments and check for ellipsis. */
10781 for (argtype = argtypes, arity = 0;
10782 argtype && argtype != void_list_node;
10783 argtype = TREE_CHAIN (argtype))
10785 ellipsis_p = !argtype;
10787 class_type = DECL_CONTEXT (decl);
10788 if (class_type && !CLASS_TYPE_P (class_type))
10789 class_type = NULL_TREE;
10791 if (DECL_CONV_FN_P (decl))
10792 operator_code = TYPE_EXPR;
10796 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
10797 if (ansi_opname (CODE) == name) \
10799 operator_code = (CODE); \
10802 else if (ansi_assopname (CODE) == name) \
10804 operator_code = (CODE); \
10805 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
10809 #include "operators.def"
10810 #undef DEF_OPERATOR
10812 gcc_unreachable ();
10815 gcc_assert (operator_code != MAX_TREE_CODES);
10816 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
10819 switch (operator_code)
10822 TYPE_HAS_NEW_OPERATOR (class_type) = 1;
10826 TYPE_GETS_DELETE (class_type) |= 1;
10830 TYPE_HAS_ARRAY_NEW_OPERATOR (class_type) = 1;
10833 case VEC_DELETE_EXPR:
10834 TYPE_GETS_DELETE (class_type) |= 2;
10841 /* [basic.std.dynamic.allocation]/1:
10843 A program is ill-formed if an allocation function is declared
10844 in a namespace scope other than global scope or declared static
10847 The same also holds true for deallocation functions. */
10848 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
10849 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10851 if (DECL_NAMESPACE_SCOPE_P (decl))
10853 if (CP_DECL_CONTEXT (decl) != global_namespace)
10855 error ("%qD may not be declared within a namespace", decl);
10858 else if (!TREE_PUBLIC (decl))
10860 error ("%qD may not be declared as static", decl);
10866 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
10868 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
10869 DECL_IS_OPERATOR_NEW (decl) = 1;
10871 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
10872 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
10875 /* An operator function must either be a non-static member function
10876 or have at least one parameter of a class, a reference to a class,
10877 an enumeration, or a reference to an enumeration. 13.4.0.6 */
10878 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
10880 if (operator_code == TYPE_EXPR
10881 || operator_code == CALL_EXPR
10882 || operator_code == COMPONENT_REF
10883 || operator_code == ARRAY_REF
10884 || operator_code == NOP_EXPR)
10886 error ("%qD must be a nonstatic member function", decl);
10893 if (DECL_STATIC_FUNCTION_P (decl))
10895 error ("%qD must be either a non-static member "
10896 "function or a non-member function", decl);
10900 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
10902 tree arg = non_reference (TREE_VALUE (p));
10903 if (arg == error_mark_node)
10906 /* MAYBE_CLASS_TYPE_P, rather than CLASS_TYPE_P, is used
10907 because these checks are performed even on
10908 template functions. */
10909 if (MAYBE_CLASS_TYPE_P (arg)
10910 || TREE_CODE (arg) == ENUMERAL_TYPE)
10914 if (!p || p == void_list_node)
10917 error ("%qD must have an argument of class or "
10918 "enumerated type", decl);
10924 /* There are no restrictions on the arguments to an overloaded
10926 if (operator_code == CALL_EXPR)
10929 /* Warn about conversion operators that will never be used. */
10930 if (IDENTIFIER_TYPENAME_P (name)
10931 && ! DECL_TEMPLATE_INFO (decl)
10933 /* Warn only declaring the function; there is no need to
10934 warn again about out-of-class definitions. */
10935 && class_type == current_class_type)
10937 tree t = TREE_TYPE (name);
10938 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
10941 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
10943 if (TREE_CODE (t) == VOID_TYPE)
10944 warning (OPT_Wconversion,
10946 ? G_("conversion to a reference to void "
10947 "will never use a type conversion operator")
10948 : G_("conversion to void "
10949 "will never use a type conversion operator"));
10950 else if (class_type)
10952 if (t == class_type)
10953 warning (OPT_Wconversion,
10955 ? G_("conversion to a reference to the same type "
10956 "will never use a type conversion operator")
10957 : G_("conversion to the same type "
10958 "will never use a type conversion operator"));
10959 /* Don't force t to be complete here. */
10960 else if (MAYBE_CLASS_TYPE_P (t)
10961 && COMPLETE_TYPE_P (t)
10962 && DERIVED_FROM_P (t, class_type))
10963 warning (OPT_Wconversion,
10965 ? G_("conversion to a reference to a base class "
10966 "will never use a type conversion operator")
10967 : G_("conversion to a base class "
10968 "will never use a type conversion operator"));
10973 if (operator_code == COND_EXPR)
10976 error ("ISO C++ prohibits overloading operator ?:");
10979 else if (ellipsis_p)
10981 error ("%qD must not have variable number of arguments", decl);
10984 else if (ambi_op_p (operator_code))
10987 /* We pick the one-argument operator codes by default, so
10988 we don't have to change anything. */
10990 else if (arity == 2)
10992 /* If we thought this was a unary operator, we now know
10993 it to be a binary operator. */
10994 switch (operator_code)
10997 operator_code = MULT_EXPR;
11001 operator_code = BIT_AND_EXPR;
11004 case UNARY_PLUS_EXPR:
11005 operator_code = PLUS_EXPR;
11009 operator_code = MINUS_EXPR;
11012 case PREINCREMENT_EXPR:
11013 operator_code = POSTINCREMENT_EXPR;
11016 case PREDECREMENT_EXPR:
11017 operator_code = POSTDECREMENT_EXPR;
11021 gcc_unreachable ();
11024 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
11026 if ((operator_code == POSTINCREMENT_EXPR
11027 || operator_code == POSTDECREMENT_EXPR)
11028 && ! processing_template_decl
11029 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
11032 error ("postfix %qD must take %<int%> as its argument",
11035 error ("postfix %qD must take %<int%> as its second "
11043 error ("%qD must take either zero or one argument", decl);
11045 error ("%qD must take either one or two arguments", decl);
11049 /* More Effective C++ rule 6. */
11051 && (operator_code == POSTINCREMENT_EXPR
11052 || operator_code == POSTDECREMENT_EXPR
11053 || operator_code == PREINCREMENT_EXPR
11054 || operator_code == PREDECREMENT_EXPR))
11056 tree arg = TREE_VALUE (argtypes);
11057 tree ret = TREE_TYPE (TREE_TYPE (decl));
11058 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
11059 arg = TREE_TYPE (arg);
11060 arg = TYPE_MAIN_VARIANT (arg);
11061 if (operator_code == PREINCREMENT_EXPR
11062 || operator_code == PREDECREMENT_EXPR)
11064 if (TREE_CODE (ret) != REFERENCE_TYPE
11065 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
11067 warning (OPT_Weffc__, "prefix %qD should return %qT", decl,
11068 build_reference_type (arg));
11072 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
11073 warning (OPT_Weffc__, "postfix %qD should return %qT", decl, arg);
11077 else if (unary_op_p (operator_code))
11082 error ("%qD must take %<void%>", decl);
11084 error ("%qD must take exactly one argument", decl);
11088 else /* if (binary_op_p (operator_code)) */
11093 error ("%qD must take exactly one argument", decl);
11095 error ("%qD must take exactly two arguments", decl);
11099 /* More Effective C++ rule 7. */
11101 && (operator_code == TRUTH_ANDIF_EXPR
11102 || operator_code == TRUTH_ORIF_EXPR
11103 || operator_code == COMPOUND_EXPR))
11104 warning (OPT_Weffc__, "user-defined %qD always evaluates both arguments",
11108 /* Effective C++ rule 23. */
11111 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
11112 && (operator_code == PLUS_EXPR
11113 || operator_code == MINUS_EXPR
11114 || operator_code == TRUNC_DIV_EXPR
11115 || operator_code == MULT_EXPR
11116 || operator_code == TRUNC_MOD_EXPR)
11117 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
11118 warning (OPT_Weffc__, "%qD should return by value", decl);
11120 /* [over.oper]/8 */
11121 for (; argtypes && argtypes != void_list_node;
11122 argtypes = TREE_CHAIN (argtypes))
11123 if (TREE_PURPOSE (argtypes))
11125 TREE_PURPOSE (argtypes) = NULL_TREE;
11126 if (operator_code == POSTINCREMENT_EXPR
11127 || operator_code == POSTDECREMENT_EXPR)
11129 pedwarn (input_location, OPT_pedantic, "%qD cannot have default arguments",
11134 error ("%qD cannot have default arguments", decl);
11142 /* Return a string giving the keyword associate with CODE. */
11144 static const char *
11145 tag_name (enum tag_types code)
11157 case typename_type:
11160 gcc_unreachable ();
11164 /* Name lookup in an elaborated-type-specifier (after the keyword
11165 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
11166 elaborated-type-specifier is invalid, issue a diagnostic and return
11167 error_mark_node; otherwise, return the *_TYPE to which it referred.
11168 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
11171 check_elaborated_type_specifier (enum tag_types tag_code,
11173 bool allow_template_p)
11179 struct S { struct S *p; };
11181 name lookup will find the TYPE_DECL for the implicit "S::S"
11182 typedef. Adjust for that here. */
11183 if (DECL_SELF_REFERENCE_P (decl))
11184 decl = TYPE_NAME (TREE_TYPE (decl));
11186 type = TREE_TYPE (decl);
11188 /* Check TEMPLATE_TYPE_PARM first because DECL_IMPLICIT_TYPEDEF_P
11189 is false for this case as well. */
11190 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
11192 error ("using template type parameter %qT after %qs",
11193 type, tag_name (tag_code));
11194 return error_mark_node;
11198 If the identifier resolves to a typedef-name or a template
11199 type-parameter, the elaborated-type-specifier is ill-formed.
11201 In other words, the only legitimate declaration to use in the
11202 elaborated type specifier is the implicit typedef created when
11203 the type is declared. */
11204 else if (!DECL_IMPLICIT_TYPEDEF_P (decl)
11205 && !DECL_SELF_REFERENCE_P (decl)
11206 && tag_code != typename_type)
11208 error ("using typedef-name %qD after %qs", decl, tag_name (tag_code));
11209 error ("%q+D has a previous declaration here", decl);
11210 return error_mark_node;
11212 else if (TREE_CODE (type) != RECORD_TYPE
11213 && TREE_CODE (type) != UNION_TYPE
11214 && tag_code != enum_type
11215 && tag_code != typename_type)
11217 error ("%qT referred to as %qs", type, tag_name (tag_code));
11218 error ("%q+T has a previous declaration here", type);
11219 return error_mark_node;
11221 else if (TREE_CODE (type) != ENUMERAL_TYPE
11222 && tag_code == enum_type)
11224 error ("%qT referred to as enum", type);
11225 error ("%q+T has a previous declaration here", type);
11226 return error_mark_node;
11228 else if (!allow_template_p
11229 && TREE_CODE (type) == RECORD_TYPE
11230 && CLASSTYPE_IS_TEMPLATE (type))
11232 /* If a class template appears as elaborated type specifier
11233 without a template header such as:
11235 template <class T> class C {};
11236 void f(class C); // No template header here
11238 then the required template argument is missing. */
11239 error ("template argument required for %<%s %T%>",
11240 tag_name (tag_code),
11241 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
11242 return error_mark_node;
11248 /* Lookup NAME in elaborate type specifier in scope according to
11249 SCOPE and issue diagnostics if necessary.
11250 Return *_TYPE node upon success, NULL_TREE when the NAME is not
11251 found, and ERROR_MARK_NODE for type error. */
11254 lookup_and_check_tag (enum tag_types tag_code, tree name,
11255 tag_scope scope, bool template_header_p)
11259 if (scope == ts_global)
11261 /* First try ordinary name lookup, ignoring hidden class name
11262 injected via friend declaration. */
11263 decl = lookup_name_prefer_type (name, 2);
11264 /* If that fails, the name will be placed in the smallest
11265 non-class, non-function-prototype scope according to 3.3.1/5.
11266 We may already have a hidden name declared as friend in this
11267 scope. So lookup again but not ignoring hidden names.
11268 If we find one, that name will be made visible rather than
11269 creating a new tag. */
11271 decl = lookup_type_scope (name, ts_within_enclosing_non_class);
11274 decl = lookup_type_scope (name, scope);
11276 if (decl && DECL_CLASS_TEMPLATE_P (decl))
11277 decl = DECL_TEMPLATE_RESULT (decl);
11279 if (decl && TREE_CODE (decl) == TYPE_DECL)
11281 /* Look for invalid nested type:
11285 if (scope == ts_current && DECL_SELF_REFERENCE_P (decl))
11287 error ("%qD has the same name as the class in which it is "
11290 return error_mark_node;
11293 /* Two cases we need to consider when deciding if a class
11294 template is allowed as an elaborated type specifier:
11295 1. It is a self reference to its own class.
11296 2. It comes with a template header.
11300 template <class T> class C {
11301 class C *c1; // DECL_SELF_REFERENCE_P is true
11304 template <class U> class C; // template_header_p is true
11305 template <class T> class C<T>::D {
11306 class C *c2; // DECL_SELF_REFERENCE_P is true
11309 t = check_elaborated_type_specifier (tag_code,
11312 | DECL_SELF_REFERENCE_P (decl));
11315 else if (decl && TREE_CODE (decl) == TREE_LIST)
11317 error ("reference to %qD is ambiguous", name);
11318 print_candidates (decl);
11319 return error_mark_node;
11325 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
11326 Define the tag as a forward-reference if it is not defined.
11328 If a declaration is given, process it here, and report an error if
11329 multiple declarations are not identical.
11331 SCOPE is TS_CURRENT when this is also a definition. Only look in
11332 the current frame for the name (since C++ allows new names in any
11333 scope.) It is TS_WITHIN_ENCLOSING_NON_CLASS if this is a friend
11334 declaration. Only look beginning from the current scope outward up
11335 till the nearest non-class scope. Otherwise it is TS_GLOBAL.
11337 TEMPLATE_HEADER_P is true when this declaration is preceded by
11338 a set of template parameters. */
11341 xref_tag_1 (enum tag_types tag_code, tree name,
11342 tag_scope scope, bool template_header_p)
11344 enum tree_code code;
11346 tree context = NULL_TREE;
11348 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
11354 code = RECORD_TYPE;
11360 code = ENUMERAL_TYPE;
11363 gcc_unreachable ();
11366 /* In case of anonymous name, xref_tag is only called to
11367 make type node and push name. Name lookup is not required. */
11368 if (ANON_AGGRNAME_P (name))
11371 t = lookup_and_check_tag (tag_code, name,
11372 scope, template_header_p);
11374 if (t == error_mark_node)
11375 return error_mark_node;
11377 if (scope != ts_current && t && current_class_type
11378 && template_class_depth (current_class_type)
11379 && template_header_p)
11381 /* Since SCOPE is not TS_CURRENT, we are not looking at a
11382 definition of this tag. Since, in addition, we are currently
11383 processing a (member) template declaration of a template
11384 class, we must be very careful; consider:
11391 { template <class V>
11392 friend struct S1; };
11394 Here, the S2::S1 declaration should not be confused with the
11395 outer declaration. In particular, the inner version should
11396 have a template parameter of level 2, not level 1. This
11397 would be particularly important if the member declaration
11400 template <class V = U> friend struct S1;
11402 say, when we should tsubst into `U' when instantiating
11403 S2. On the other hand, when presented with:
11413 we must find the inner binding eventually. We
11414 accomplish this by making sure that the new type we
11415 create to represent this declaration has the right
11417 context = TYPE_CONTEXT (t);
11423 /* If no such tag is yet defined, create a forward-reference node
11424 and record it as the "definition".
11425 When a real declaration of this type is found,
11426 the forward-reference will be altered into a real type. */
11427 if (code == ENUMERAL_TYPE)
11429 error ("use of enum %q#D without previous declaration", name);
11430 return error_mark_node;
11434 t = make_class_type (code);
11435 TYPE_CONTEXT (t) = context;
11436 t = pushtag (name, t, scope);
11441 if (template_header_p && MAYBE_CLASS_TYPE_P (t))
11443 if (!redeclare_class_template (t, current_template_parms))
11444 return error_mark_node;
11446 else if (!processing_template_decl
11447 && CLASS_TYPE_P (t)
11448 && CLASSTYPE_IS_TEMPLATE (t))
11450 error ("redeclaration of %qT as a non-template", t);
11451 error ("previous declaration %q+D", t);
11452 return error_mark_node;
11455 /* Make injected friend class visible. */
11456 if (scope != ts_within_enclosing_non_class
11457 && hidden_name_p (TYPE_NAME (t)))
11459 DECL_ANTICIPATED (TYPE_NAME (t)) = 0;
11460 DECL_FRIEND_P (TYPE_NAME (t)) = 0;
11462 if (TYPE_TEMPLATE_INFO (t))
11464 DECL_ANTICIPATED (TYPE_TI_TEMPLATE (t)) = 0;
11465 DECL_FRIEND_P (TYPE_TI_TEMPLATE (t)) = 0;
11473 /* Wrapper for xref_tag_1. */
11476 xref_tag (enum tag_types tag_code, tree name,
11477 tag_scope scope, bool template_header_p)
11480 timevar_start (TV_NAME_LOOKUP);
11481 ret = xref_tag_1 (tag_code, name, scope, template_header_p);
11482 timevar_stop (TV_NAME_LOOKUP);
11488 xref_tag_from_type (tree old, tree id, tag_scope scope)
11490 enum tag_types tag_kind;
11492 if (TREE_CODE (old) == RECORD_TYPE)
11493 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
11495 tag_kind = union_type;
11497 if (id == NULL_TREE)
11498 id = TYPE_IDENTIFIER (old);
11500 return xref_tag (tag_kind, id, scope, false);
11503 /* Create the binfo hierarchy for REF with (possibly NULL) base list
11504 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
11505 access_* node, and the TREE_VALUE is the type of the base-class.
11506 Non-NULL TREE_TYPE indicates virtual inheritance.
11508 Returns true if the binfo hierarchy was successfully created,
11509 false if an error was detected. */
11512 xref_basetypes (tree ref, tree base_list)
11515 tree binfo, base_binfo;
11516 unsigned max_vbases = 0; /* Maximum direct & indirect virtual bases. */
11517 unsigned max_bases = 0; /* Maximum direct bases. */
11519 tree default_access;
11520 tree igo_prev; /* Track Inheritance Graph Order. */
11522 if (ref == error_mark_node)
11525 /* The base of a derived class is private by default, all others are
11527 default_access = (TREE_CODE (ref) == RECORD_TYPE
11528 && CLASSTYPE_DECLARED_CLASS (ref)
11529 ? access_private_node : access_public_node);
11531 /* First, make sure that any templates in base-classes are
11532 instantiated. This ensures that if we call ourselves recursively
11533 we do not get confused about which classes are marked and which
11535 basep = &base_list;
11538 tree basetype = TREE_VALUE (*basep);
11540 if (!(processing_template_decl && uses_template_parms (basetype))
11541 && !complete_type_or_else (basetype, NULL))
11542 /* An incomplete type. Remove it from the list. */
11543 *basep = TREE_CHAIN (*basep);
11547 if (TREE_TYPE (*basep))
11549 if (CLASS_TYPE_P (basetype))
11550 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
11551 basep = &TREE_CHAIN (*basep);
11555 TYPE_MARKED_P (ref) = 1;
11557 /* The binfo slot should be empty, unless this is an (ill-formed)
11559 if (TYPE_BINFO (ref) && !TYPE_SIZE (ref))
11561 error ("redefinition of %q#T", ref);
11565 gcc_assert (TYPE_MAIN_VARIANT (ref) == ref);
11567 binfo = make_tree_binfo (max_bases);
11569 TYPE_BINFO (ref) = binfo;
11570 BINFO_OFFSET (binfo) = size_zero_node;
11571 BINFO_TYPE (binfo) = ref;
11573 /* Apply base-class info set up to the variants of this type. */
11574 fixup_type_variants (ref);
11578 BINFO_BASE_ACCESSES (binfo) = VEC_alloc (tree, gc, max_bases);
11579 /* An aggregate cannot have baseclasses. */
11580 CLASSTYPE_NON_AGGREGATE (ref) = 1;
11582 if (TREE_CODE (ref) == UNION_TYPE)
11584 error ("derived union %qT invalid", ref);
11591 if (TYPE_FOR_JAVA (ref))
11593 error ("Java class %qT cannot have multiple bases", ref);
11600 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, gc, max_vbases);
11602 if (TYPE_FOR_JAVA (ref))
11604 error ("Java class %qT cannot have virtual bases", ref);
11609 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
11611 tree access = TREE_PURPOSE (base_list);
11612 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
11613 tree basetype = TREE_VALUE (base_list);
11615 if (access == access_default_node)
11616 access = default_access;
11618 if (PACK_EXPANSION_P (basetype))
11619 basetype = PACK_EXPANSION_PATTERN (basetype);
11620 if (TREE_CODE (basetype) == TYPE_DECL)
11621 basetype = TREE_TYPE (basetype);
11622 if (!MAYBE_CLASS_TYPE_P (basetype) || TREE_CODE (basetype) == UNION_TYPE)
11624 error ("base type %qT fails to be a struct or class type",
11629 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
11630 TYPE_FOR_JAVA (ref) = 1;
11632 base_binfo = NULL_TREE;
11633 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
11635 base_binfo = TYPE_BINFO (basetype);
11636 /* The original basetype could have been a typedef'd type. */
11637 basetype = BINFO_TYPE (base_binfo);
11639 /* Inherit flags from the base. */
11640 TYPE_HAS_NEW_OPERATOR (ref)
11641 |= TYPE_HAS_NEW_OPERATOR (basetype);
11642 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
11643 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
11644 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
11645 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
11646 CLASSTYPE_DIAMOND_SHAPED_P (ref)
11647 |= CLASSTYPE_DIAMOND_SHAPED_P (basetype);
11648 CLASSTYPE_REPEATED_BASE_P (ref)
11649 |= CLASSTYPE_REPEATED_BASE_P (basetype);
11652 /* We must do this test after we've seen through a typedef
11654 if (TYPE_MARKED_P (basetype))
11656 if (basetype == ref)
11657 error ("recursive type %qT undefined", basetype);
11659 error ("duplicate base type %qT invalid", basetype);
11663 if (PACK_EXPANSION_P (TREE_VALUE (base_list)))
11664 /* Regenerate the pack expansion for the bases. */
11665 basetype = make_pack_expansion (basetype);
11667 TYPE_MARKED_P (basetype) = 1;
11669 base_binfo = copy_binfo (base_binfo, basetype, ref,
11670 &igo_prev, via_virtual);
11671 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
11672 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
11674 BINFO_BASE_APPEND (binfo, base_binfo);
11675 BINFO_BASE_ACCESS_APPEND (binfo, access);
11678 if (VEC_space (tree, CLASSTYPE_VBASECLASSES (ref), 1))
11679 /* If we have space in the vbase vector, we must have shared at
11680 least one of them, and are therefore diamond shaped. */
11681 CLASSTYPE_DIAMOND_SHAPED_P (ref) = 1;
11683 /* Unmark all the types. */
11684 for (i = 0; BINFO_BASE_ITERATE (binfo, i, base_binfo); i++)
11685 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
11686 TYPE_MARKED_P (ref) = 0;
11688 /* Now see if we have a repeated base type. */
11689 if (!CLASSTYPE_REPEATED_BASE_P (ref))
11691 for (base_binfo = binfo; base_binfo;
11692 base_binfo = TREE_CHAIN (base_binfo))
11694 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
11696 CLASSTYPE_REPEATED_BASE_P (ref) = 1;
11699 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 1;
11701 for (base_binfo = binfo; base_binfo;
11702 base_binfo = TREE_CHAIN (base_binfo))
11703 if (TYPE_MARKED_P (BINFO_TYPE (base_binfo)))
11704 TYPE_MARKED_P (BINFO_TYPE (base_binfo)) = 0;
11713 /* Copies the enum-related properties from type SRC to type DST.
11714 Used with the underlying type of an enum and the enum itself. */
11716 copy_type_enum (tree dst, tree src)
11718 TYPE_MIN_VALUE (dst) = TYPE_MIN_VALUE (src);
11719 TYPE_MAX_VALUE (dst) = TYPE_MAX_VALUE (src);
11720 TYPE_SIZE (dst) = TYPE_SIZE (src);
11721 TYPE_SIZE_UNIT (dst) = TYPE_SIZE_UNIT (src);
11722 SET_TYPE_MODE (dst, TYPE_MODE (src));
11723 TYPE_PRECISION (dst) = TYPE_PRECISION (src);
11724 TYPE_ALIGN (dst) = TYPE_ALIGN (src);
11725 TYPE_USER_ALIGN (dst) = TYPE_USER_ALIGN (src);
11726 TYPE_UNSIGNED (dst) = TYPE_UNSIGNED (src);
11729 /* Begin compiling the definition of an enumeration type.
11732 if ENUMTYPE is not NULL_TREE then the type has alredy been found.
11734 UNDERLYING_TYPE is the type that will be used as the storage for
11735 the enumeration type. This should be NULL_TREE if no storage type
11738 SCOPED_ENUM_P is true if this is a scoped enumeration type.
11740 if IS_NEW is not NULL, gets TRUE iff a new type is created.
11742 Returns the type object, as yet incomplete.
11743 Also records info about it so that build_enumerator
11744 may be used to declare the individual values as they are read. */
11747 start_enum (tree name, tree enumtype, tree underlying_type,
11748 bool scoped_enum_p, bool *is_new)
11750 tree prevtype = NULL_TREE;
11751 gcc_assert (TREE_CODE (name) == IDENTIFIER_NODE);
11755 /* [C++0x dcl.enum]p5:
11757 If not explicitly specified, the underlying type of a scoped
11758 enumeration type is int. */
11759 if (!underlying_type && scoped_enum_p)
11760 underlying_type = integer_type_node;
11762 if (underlying_type)
11763 underlying_type = cv_unqualified (underlying_type);
11765 /* If this is the real definition for a previous forward reference,
11766 fill in the contents in the same object that used to be the
11767 forward reference. */
11769 enumtype = lookup_and_check_tag (enum_type, name,
11770 /*tag_scope=*/ts_current,
11771 /*template_header_p=*/false);
11773 /* In case of a template_decl, the only check that should be deferred
11774 to instantiation time is the comparison of underlying types. */
11775 if (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE)
11777 if (scoped_enum_p != SCOPED_ENUM_P (enumtype))
11779 error_at (input_location, "scoped/unscoped mismatch "
11780 "in enum %q#T", enumtype);
11781 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
11782 "previous definition here");
11783 enumtype = error_mark_node;
11785 else if (ENUM_FIXED_UNDERLYING_TYPE_P (enumtype) != !! underlying_type)
11787 error_at (input_location, "underlying type mismatch "
11788 "in enum %q#T", enumtype);
11789 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
11790 "previous definition here");
11791 enumtype = error_mark_node;
11793 else if (underlying_type && ENUM_UNDERLYING_TYPE (enumtype)
11794 && !dependent_type_p (underlying_type)
11795 && !dependent_type_p (ENUM_UNDERLYING_TYPE (enumtype))
11796 && !same_type_p (underlying_type,
11797 ENUM_UNDERLYING_TYPE (enumtype)))
11799 error_at (input_location, "different underlying type "
11800 "in enum %q#T", enumtype);
11801 error_at (DECL_SOURCE_LOCATION (TYPE_MAIN_DECL (enumtype)),
11802 "previous definition here");
11803 underlying_type = NULL_TREE;
11807 if (!enumtype || TREE_CODE (enumtype) != ENUMERAL_TYPE
11808 || processing_template_decl)
11810 /* In case of error, make a dummy enum to allow parsing to
11812 if (enumtype == error_mark_node)
11814 name = make_anon_name ();
11815 enumtype = NULL_TREE;
11818 /* enumtype may be an ENUMERAL_TYPE if this is a redefinition
11819 of an opaque enum, or an opaque enum of an already defined
11820 enumeration (C++0x only).
11821 In any other case, it'll be NULL_TREE. */
11827 prevtype = enumtype;
11828 enumtype = cxx_make_type (ENUMERAL_TYPE);
11829 enumtype = pushtag (name, enumtype, /*tag_scope=*/ts_current);
11830 if (enumtype == error_mark_node)
11831 return error_mark_node;
11833 /* The enum is considered opaque until the opening '{' of the
11834 enumerator list. */
11835 SET_OPAQUE_ENUM_P (enumtype, true);
11836 ENUM_FIXED_UNDERLYING_TYPE_P (enumtype) = !! underlying_type;
11839 SET_SCOPED_ENUM_P (enumtype, scoped_enum_p);
11841 if (underlying_type)
11843 if (CP_INTEGRAL_TYPE_P (underlying_type))
11845 copy_type_enum (enumtype, underlying_type);
11846 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
11848 else if (dependent_type_p (underlying_type))
11849 ENUM_UNDERLYING_TYPE (enumtype) = underlying_type;
11851 error ("underlying type %<%T%> of %<%T%> must be an integral type",
11852 underlying_type, enumtype);
11855 /* If into a template class, the returned enum is always the first
11856 declaration (opaque or not) seen. This way all the references to
11857 this type will be to the same declaration. The following ones are used
11858 only to check for definition errors. */
11859 if (prevtype && processing_template_decl)
11865 /* After processing and defining all the values of an enumeration type,
11866 install their decls in the enumeration type.
11867 ENUMTYPE is the type object. */
11870 finish_enum_value_list (tree enumtype)
11873 tree underlying_type;
11876 tree minnode, maxnode;
11879 bool fixed_underlying_type_p
11880 = ENUM_UNDERLYING_TYPE (enumtype) != NULL_TREE;
11882 /* We built up the VALUES in reverse order. */
11883 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
11885 /* For an enum defined in a template, just set the type of the values;
11886 all further processing is postponed until the template is
11887 instantiated. We need to set the type so that tsubst of a CONST_DECL
11889 if (processing_template_decl)
11891 for (values = TYPE_VALUES (enumtype);
11893 values = TREE_CHAIN (values))
11894 TREE_TYPE (TREE_VALUE (values)) = enumtype;
11898 /* Determine the minimum and maximum values of the enumerators. */
11899 if (TYPE_VALUES (enumtype))
11901 minnode = maxnode = NULL_TREE;
11903 for (values = TYPE_VALUES (enumtype);
11905 values = TREE_CHAIN (values))
11907 decl = TREE_VALUE (values);
11909 /* [dcl.enum]: Following the closing brace of an enum-specifier,
11910 each enumerator has the type of its enumeration. Prior to the
11911 closing brace, the type of each enumerator is the type of its
11912 initializing value. */
11913 TREE_TYPE (decl) = enumtype;
11915 /* Update the minimum and maximum values, if appropriate. */
11916 value = DECL_INITIAL (decl);
11917 if (value == error_mark_node)
11918 value = integer_zero_node;
11919 /* Figure out what the minimum and maximum values of the
11920 enumerators are. */
11922 minnode = maxnode = value;
11923 else if (tree_int_cst_lt (maxnode, value))
11925 else if (tree_int_cst_lt (value, minnode))
11932 If the enumerator-list is empty, the underlying type is as if
11933 the enumeration had a single enumerator with value 0. */
11934 minnode = maxnode = integer_zero_node;
11936 if (!fixed_underlying_type_p)
11938 /* Compute the number of bits require to represent all values of the
11939 enumeration. We must do this before the type of MINNODE and
11940 MAXNODE are transformed, since tree_int_cst_min_precision relies
11941 on the TREE_TYPE of the value it is passed. */
11942 bool unsignedp = tree_int_cst_sgn (minnode) >= 0;
11943 int lowprec = tree_int_cst_min_precision (minnode, unsignedp);
11944 int highprec = tree_int_cst_min_precision (maxnode, unsignedp);
11945 int precision = MAX (lowprec, highprec);
11947 bool use_short_enum;
11949 /* Determine the underlying type of the enumeration.
11953 The underlying type of an enumeration is an integral type that
11954 can represent all the enumerator values defined in the
11955 enumeration. It is implementation-defined which integral type is
11956 used as the underlying type for an enumeration except that the
11957 underlying type shall not be larger than int unless the value of
11958 an enumerator cannot fit in an int or unsigned int.
11960 We use "int" or an "unsigned int" as the underlying type, even if
11961 a smaller integral type would work, unless the user has
11962 explicitly requested that we use the smallest possible type. The
11963 user can request that for all enumerations with a command line
11964 flag, or for just one enumeration with an attribute. */
11966 use_short_enum = flag_short_enums
11967 || lookup_attribute ("packed", TYPE_ATTRIBUTES (enumtype));
11969 for (itk = (use_short_enum ? itk_char : itk_int);
11973 underlying_type = integer_types[itk];
11974 if (underlying_type != NULL_TREE
11975 && TYPE_PRECISION (underlying_type) >= precision
11976 && TYPE_UNSIGNED (underlying_type) == unsignedp)
11979 if (itk == itk_none)
11983 IF no integral type can represent all the enumerator values, the
11984 enumeration is ill-formed. */
11985 error ("no integral type can represent all of the enumerator values "
11986 "for %qT", enumtype);
11987 precision = TYPE_PRECISION (long_long_integer_type_node);
11988 underlying_type = integer_types[itk_unsigned_long_long];
11993 The value of sizeof() applied to an enumeration type, an object
11994 of an enumeration type, or an enumerator, is the value of sizeof()
11995 applied to the underlying type. */
11996 copy_type_enum (enumtype, underlying_type);
11998 /* Compute the minimum and maximum values for the type.
12002 For an enumeration where emin is the smallest enumerator and emax
12003 is the largest, the values of the enumeration are the values of the
12004 underlying type in the range bmin to bmax, where bmin and bmax are,
12005 respectively, the smallest and largest values of the smallest bit-
12006 field that can store emin and emax. */
12008 /* The middle-end currently assumes that types with TYPE_PRECISION
12009 narrower than their underlying type are suitably zero or sign
12010 extended to fill their mode. Similarly, it assumes that the front
12011 end assures that a value of a particular type must be within
12012 TYPE_MIN_VALUE and TYPE_MAX_VALUE.
12014 We used to set these fields based on bmin and bmax, but that led
12015 to invalid assumptions like optimizing away bounds checking. So
12016 now we just set the TYPE_PRECISION, TYPE_MIN_VALUE, and
12017 TYPE_MAX_VALUE to the values for the mode above and only restrict
12018 the ENUM_UNDERLYING_TYPE for the benefit of diagnostics. */
12019 ENUM_UNDERLYING_TYPE (enumtype)
12020 = build_distinct_type_copy (underlying_type);
12021 TYPE_PRECISION (ENUM_UNDERLYING_TYPE (enumtype)) = precision;
12022 set_min_and_max_values_for_integral_type
12023 (ENUM_UNDERLYING_TYPE (enumtype), precision, unsignedp);
12025 /* If -fstrict-enums, still constrain TYPE_MIN/MAX_VALUE. */
12026 if (flag_strict_enums)
12027 set_min_and_max_values_for_integral_type (enumtype, precision,
12031 underlying_type = ENUM_UNDERLYING_TYPE (enumtype);
12033 /* Convert each of the enumerators to the type of the underlying
12034 type of the enumeration. */
12035 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
12037 location_t saved_location;
12039 decl = TREE_VALUE (values);
12040 saved_location = input_location;
12041 input_location = DECL_SOURCE_LOCATION (decl);
12042 if (fixed_underlying_type_p)
12043 /* If the enumeration type has a fixed underlying type, we
12044 already checked all of the enumerator values. */
12045 value = DECL_INITIAL (decl);
12047 value = perform_implicit_conversion (underlying_type,
12048 DECL_INITIAL (decl),
12049 tf_warning_or_error);
12050 input_location = saved_location;
12052 /* Do not clobber shared ints. */
12053 value = copy_node (value);
12055 TREE_TYPE (value) = enumtype;
12056 DECL_INITIAL (decl) = value;
12059 /* Fix up all variant types of this enum type. */
12060 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
12061 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
12063 /* Finish debugging output for this type. */
12064 rest_of_type_compilation (enumtype, namespace_bindings_p ());
12067 /* Finishes the enum type. This is called only the first time an
12068 enumeration is seen, be it opaque or odinary.
12069 ENUMTYPE is the type object. */
12072 finish_enum (tree enumtype)
12074 if (processing_template_decl)
12076 if (at_function_scope_p ())
12077 add_stmt (build_min (TAG_DEFN, enumtype));
12081 /* Here there should not be any variants of this type. */
12082 gcc_assert (enumtype == TYPE_MAIN_VARIANT (enumtype)
12083 && !TYPE_NEXT_VARIANT (enumtype));
12086 /* Build and install a CONST_DECL for an enumeration constant of the
12087 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
12088 LOC is the location of NAME.
12089 Assignment of sequential values by default is handled here. */
12092 build_enumerator (tree name, tree value, tree enumtype, location_t loc)
12098 /* If the VALUE was erroneous, pretend it wasn't there; that will
12099 result in the enum being assigned the next value in sequence. */
12100 if (value == error_mark_node)
12103 /* Remove no-op casts from the value. */
12105 STRIP_TYPE_NOPS (value);
12107 if (! processing_template_decl)
12109 /* Validate and default VALUE. */
12110 if (value != NULL_TREE)
12112 value = cxx_constant_value (value);
12114 if (TREE_CODE (value) == INTEGER_CST
12115 && INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (value)))
12117 value = perform_integral_promotions (value);
12121 error ("enumerator value for %qD is not an integer constant", name);
12126 /* Default based on previous value. */
12127 if (value == NULL_TREE)
12129 if (TYPE_VALUES (enumtype))
12132 unsigned HOST_WIDE_INT lo;
12136 /* The next value is the previous value plus one.
12137 add_double doesn't know the type of the target expression,
12138 so we must check with int_fits_type_p as well. */
12139 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
12140 if (error_operand_p (prev_value))
12141 value = error_mark_node;
12144 overflowed = add_double (TREE_INT_CST_LOW (prev_value),
12145 TREE_INT_CST_HIGH (prev_value),
12147 value = build_int_cst_wide (TREE_TYPE (prev_value), lo, hi);
12149 |= !int_fits_type_p (value, TREE_TYPE (prev_value));
12153 error ("overflow in enumeration values at %qD", name);
12154 value = error_mark_node;
12159 value = integer_zero_node;
12162 /* Remove no-op casts from the value. */
12163 STRIP_TYPE_NOPS (value);
12165 /* If the underlying type of the enum is fixed, check whether
12166 the enumerator values fits in the underlying type. If it
12167 does not fit, the program is ill-formed [C++0x dcl.enum]. */
12168 if (ENUM_UNDERLYING_TYPE (enumtype)
12170 && TREE_CODE (value) == INTEGER_CST
12171 && !int_fits_type_p (value, ENUM_UNDERLYING_TYPE (enumtype)))
12173 error ("enumerator value %E is too large for underlying type %<%T%>",
12174 value, ENUM_UNDERLYING_TYPE (enumtype));
12176 /* Silently convert the value so that we can continue. */
12177 value = perform_implicit_conversion (ENUM_UNDERLYING_TYPE (enumtype),
12182 /* C++ associates enums with global, function, or class declarations. */
12183 context = current_scope ();
12185 /* Build the actual enumeration constant. Note that the enumeration
12186 constants have the underlying type of the enum (if it is fixed)
12187 or the type of their initializer (if the underlying type of the
12188 enum is not fixed):
12192 If the underlying type is fixed, the type of each enumerator
12193 prior to the closing brace is the underlying type; if the
12194 initializing value of an enumerator cannot be represented by
12195 the underlying type, the program is ill-formed. If the
12196 underlying type is not fixed, the type of each enumerator is
12197 the type of its initializing value.
12199 If the underlying type is not fixed, it will be computed by
12200 finish_enum and we will reset the type of this enumerator. Of
12201 course, if we're processing a template, there may be no value. */
12202 type = value ? TREE_TYPE (value) : NULL_TREE;
12204 if (context && context == current_class_type)
12205 /* This enum declaration is local to the class. We need the full
12206 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
12207 decl = build_lang_decl_loc (loc, CONST_DECL, name, type);
12209 /* It's a global enum, or it's local to a function. (Note local to
12210 a function could mean local to a class method. */
12211 decl = build_decl (loc, CONST_DECL, name, type);
12213 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
12214 TREE_CONSTANT (decl) = 1;
12215 TREE_READONLY (decl) = 1;
12216 DECL_INITIAL (decl) = value;
12218 if (context && context == current_class_type && !SCOPED_ENUM_P (enumtype))
12219 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
12220 on the TYPE_FIELDS list for `S'. (That's so that you can say
12221 things like `S::i' later.) */
12222 finish_member_declaration (decl);
12226 /* Add this enumeration constant to the list for this type. */
12227 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
12230 /* Look for an enumerator with the given NAME within the enumeration
12231 type ENUMTYPE. This routine is used primarily for qualified name
12232 lookup into an enumerator in C++0x, e.g.,
12234 enum class Color { Red, Green, Blue };
12236 Color color = Color::Red;
12238 Returns the value corresponding to the enumerator, or
12239 NULL_TREE if no such enumerator was found. */
12241 lookup_enumerator (tree enumtype, tree name)
12244 gcc_assert (enumtype && TREE_CODE (enumtype) == ENUMERAL_TYPE);
12246 e = purpose_member (name, TYPE_VALUES (enumtype));
12247 return e? TREE_VALUE (e) : NULL_TREE;
12251 /* We're defining DECL. Make sure that its type is OK. */
12254 check_function_type (tree decl, tree current_function_parms)
12256 tree fntype = TREE_TYPE (decl);
12257 tree return_type = complete_type (TREE_TYPE (fntype));
12259 /* In a function definition, arg types must be complete. */
12260 require_complete_types_for_parms (current_function_parms);
12262 if (dependent_type_p (return_type))
12264 if (!COMPLETE_OR_VOID_TYPE_P (return_type)
12265 || (TYPE_FOR_JAVA (return_type) && MAYBE_CLASS_TYPE_P (return_type)))
12267 tree args = TYPE_ARG_TYPES (fntype);
12269 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
12270 error ("return type %q#T is incomplete", return_type);
12272 error ("return type has Java class type %q#T", return_type);
12274 /* Make it return void instead. */
12275 if (TREE_CODE (fntype) == METHOD_TYPE)
12276 fntype = build_method_type_directly (TREE_TYPE (TREE_VALUE (args)),
12278 TREE_CHAIN (args));
12280 fntype = build_function_type (void_type_node, args);
12282 = build_exception_variant (fntype,
12283 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (decl)));
12284 fntype = (cp_build_type_attribute_variant
12285 (fntype, TYPE_ATTRIBUTES (TREE_TYPE (decl))));
12286 TREE_TYPE (decl) = fntype;
12289 abstract_virtuals_error (decl, TREE_TYPE (fntype));
12292 /* Create the FUNCTION_DECL for a function definition.
12293 DECLSPECS and DECLARATOR are the parts of the declaration;
12294 they describe the function's name and the type it returns,
12295 but twisted together in a fashion that parallels the syntax of C.
12297 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
12298 DECLARATOR is really the DECL for the function we are about to
12299 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
12300 indicating that the function is an inline defined in-class.
12302 This function creates a binding context for the function body
12303 as well as setting up the FUNCTION_DECL in current_function_decl.
12305 For C++, we must first check whether that datum makes any sense.
12306 For example, "class A local_a(1,2);" means that variable local_a
12307 is an aggregate of type A, which should have a constructor
12308 applied to it with the argument list [1, 2].
12310 On entry, DECL_INITIAL (decl1) should be NULL_TREE or error_mark_node,
12311 or may be a BLOCK if the function has been defined previously
12312 in this translation unit. On exit, DECL_INITIAL (decl1) will be
12313 error_mark_node if the function has never been defined, or
12314 a BLOCK if the function has been defined somewhere. */
12317 start_preparsed_function (tree decl1, tree attrs, int flags)
12319 tree ctype = NULL_TREE;
12322 int doing_friend = 0;
12323 struct cp_binding_level *bl;
12324 tree current_function_parms;
12325 struct c_fileinfo *finfo
12326 = get_fileinfo (LOCATION_FILE (DECL_SOURCE_LOCATION (decl1)));
12327 bool honor_interface;
12329 /* Sanity check. */
12330 gcc_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE);
12331 gcc_assert (TREE_CHAIN (void_list_node) == NULL_TREE);
12333 fntype = TREE_TYPE (decl1);
12334 if (TREE_CODE (fntype) == METHOD_TYPE)
12335 ctype = TYPE_METHOD_BASETYPE (fntype);
12337 /* ISO C++ 11.4/5. A friend function defined in a class is in
12338 the (lexical) scope of the class in which it is defined. */
12339 if (!ctype && DECL_FRIEND_P (decl1))
12341 ctype = DECL_FRIEND_CONTEXT (decl1);
12343 /* CTYPE could be null here if we're dealing with a template;
12344 for example, `inline friend float foo()' inside a template
12345 will have no CTYPE set. */
12346 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
12352 if (DECL_DECLARED_INLINE_P (decl1)
12353 && lookup_attribute ("noinline", attrs))
12354 warning (0, "inline function %q+D given attribute noinline", decl1);
12356 /* Handle gnu_inline attribute. */
12357 if (GNU_INLINE_P (decl1))
12359 DECL_EXTERNAL (decl1) = 1;
12360 DECL_NOT_REALLY_EXTERN (decl1) = 0;
12361 DECL_INTERFACE_KNOWN (decl1) = 1;
12362 DECL_DISREGARD_INLINE_LIMITS (decl1) = 1;
12365 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
12366 /* This is a constructor, we must ensure that any default args
12367 introduced by this definition are propagated to the clones
12368 now. The clones are used directly in overload resolution. */
12369 adjust_clone_args (decl1);
12371 /* Sometimes we don't notice that a function is a static member, and
12372 build a METHOD_TYPE for it. Fix that up now. */
12373 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
12374 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
12376 revert_static_member_fn (decl1);
12380 /* Set up current_class_type, and enter the scope of the class, if
12383 push_nested_class (ctype);
12384 else if (DECL_STATIC_FUNCTION_P (decl1))
12385 push_nested_class (DECL_CONTEXT (decl1));
12387 /* Now that we have entered the scope of the class, we must restore
12388 the bindings for any template parameters surrounding DECL1, if it
12389 is an inline member template. (Order is important; consider the
12390 case where a template parameter has the same name as a field of
12391 the class.) It is not until after this point that
12392 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
12393 if (flags & SF_INCLASS_INLINE)
12394 maybe_begin_member_template_processing (decl1);
12396 /* Effective C++ rule 15. */
12398 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
12399 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
12400 warning (OPT_Weffc__, "%<operator=%> should return a reference to %<*this%>");
12402 /* Make the init_value nonzero so pushdecl knows this is not tentative.
12403 error_mark_node is replaced below (in poplevel) with the BLOCK. */
12404 if (!DECL_INITIAL (decl1))
12405 DECL_INITIAL (decl1) = error_mark_node;
12407 /* This function exists in static storage.
12408 (This does not mean `static' in the C sense!) */
12409 TREE_STATIC (decl1) = 1;
12411 /* We must call push_template_decl after current_class_type is set
12412 up. (If we are processing inline definitions after exiting a
12413 class scope, current_class_type will be NULL_TREE until set above
12414 by push_nested_class.) */
12415 if (processing_template_decl)
12417 /* FIXME: Handle error_mark_node more gracefully. */
12418 tree newdecl1 = push_template_decl (decl1);
12419 if (newdecl1 != error_mark_node)
12423 /* We are now in the scope of the function being defined. */
12424 current_function_decl = decl1;
12426 /* Save the parm names or decls from this function's declarator
12427 where store_parm_decls will find them. */
12428 current_function_parms = DECL_ARGUMENTS (decl1);
12430 /* Make sure the parameter and return types are reasonable. When
12431 you declare a function, these types can be incomplete, but they
12432 must be complete when you define the function. */
12433 check_function_type (decl1, current_function_parms);
12435 /* Build the return declaration for the function. */
12436 restype = TREE_TYPE (fntype);
12437 if (DECL_RESULT (decl1) == NULL_TREE)
12441 resdecl = build_decl (input_location, RESULT_DECL, 0, restype);
12442 DECL_ARTIFICIAL (resdecl) = 1;
12443 DECL_IGNORED_P (resdecl) = 1;
12444 DECL_RESULT (decl1) = resdecl;
12446 cp_apply_type_quals_to_decl (cp_type_quals (restype), resdecl);
12449 /* Let the user know we're compiling this function. */
12450 announce_function (decl1);
12452 /* Record the decl so that the function name is defined.
12453 If we already have a decl for this name, and it is a FUNCTION_DECL,
12454 use the old decl. */
12455 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
12457 /* A specialization is not used to guide overload resolution. */
12458 if (!DECL_FUNCTION_MEMBER_P (decl1)
12459 && !(DECL_USE_TEMPLATE (decl1) &&
12460 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
12462 tree olddecl = pushdecl (decl1);
12464 if (olddecl == error_mark_node)
12465 /* If something went wrong when registering the declaration,
12466 use DECL1; we have to have a FUNCTION_DECL to use when
12467 parsing the body of the function. */
12471 /* Otherwise, OLDDECL is either a previous declaration
12472 of the same function or DECL1 itself. */
12474 if (warn_missing_declarations
12475 && olddecl == decl1
12476 && !DECL_MAIN_P (decl1)
12477 && TREE_PUBLIC (decl1)
12478 && !DECL_DECLARED_INLINE_P (decl1))
12482 /* Check whether DECL1 is in an anonymous
12484 for (context = DECL_CONTEXT (decl1);
12486 context = DECL_CONTEXT (context))
12488 if (TREE_CODE (context) == NAMESPACE_DECL
12489 && DECL_NAME (context) == NULL_TREE)
12493 if (context == NULL)
12494 warning (OPT_Wmissing_declarations,
12495 "no previous declaration for %q+D", decl1);
12503 /* We need to set the DECL_CONTEXT. */
12504 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
12505 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
12507 fntype = TREE_TYPE (decl1);
12509 /* If #pragma weak applies, mark the decl appropriately now.
12510 The pragma only applies to global functions. Because
12511 determining whether or not the #pragma applies involves
12512 computing the mangled name for the declaration, we cannot
12513 apply the pragma until after we have merged this declaration
12514 with any previous declarations; if the original declaration
12515 has a linkage specification, that specification applies to
12516 the definition as well, and may affect the mangled name. */
12517 if (DECL_FILE_SCOPE_P (decl1))
12518 maybe_apply_pragma_weak (decl1);
12521 /* constexpr functions must have literal argument types and
12522 literal return type. */
12523 validate_constexpr_fundecl (decl1);
12525 /* Reset this in case the call to pushdecl changed it. */
12526 current_function_decl = decl1;
12528 gcc_assert (DECL_INITIAL (decl1));
12530 /* This function may already have been parsed, in which case just
12531 return; our caller will skip over the body without parsing. */
12532 if (DECL_INITIAL (decl1) != error_mark_node)
12535 /* Initialize RTL machinery. We cannot do this until
12536 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
12537 even when processing a template; this is how we get
12538 CFUN set up, and our per-function variables initialized.
12539 FIXME factor out the non-RTL stuff. */
12540 bl = current_binding_level;
12541 allocate_struct_function (decl1, processing_template_decl);
12543 /* Initialize the language data structures. Whenever we start
12544 a new function, we destroy temporaries in the usual way. */
12545 cfun->language = ggc_alloc_cleared_language_function ();
12546 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
12547 current_binding_level = bl;
12549 /* Start the statement-tree, start the tree now. */
12550 DECL_SAVED_TREE (decl1) = push_stmt_list ();
12552 /* If we are (erroneously) defining a function that we have already
12553 defined before, wipe out what we knew before. */
12554 if (!DECL_PENDING_INLINE_P (decl1))
12555 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
12557 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
12559 /* We know that this was set up by `grokclassfn'. We do not
12560 wait until `store_parm_decls', since evil parse errors may
12561 never get us to that point. Here we keep the consistency
12562 between `current_class_type' and `current_class_ptr'. */
12563 tree t = DECL_ARGUMENTS (decl1);
12565 gcc_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL);
12566 gcc_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE);
12568 cp_function_chain->x_current_class_ref
12569 = cp_build_indirect_ref (t, RO_NULL, tf_warning_or_error);
12570 cp_function_chain->x_current_class_ptr = t;
12572 /* Constructors and destructors need to know whether they're "in
12573 charge" of initializing virtual base classes. */
12574 t = DECL_CHAIN (t);
12575 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
12577 current_in_charge_parm = t;
12578 t = DECL_CHAIN (t);
12580 if (DECL_HAS_VTT_PARM_P (decl1))
12582 gcc_assert (DECL_NAME (t) == vtt_parm_identifier);
12583 current_vtt_parm = t;
12587 honor_interface = (!DECL_TEMPLATE_INSTANTIATION (decl1)
12588 /* Implicitly-defined methods (like the
12589 destructor for a class in which no destructor
12590 is explicitly declared) must not be defined
12591 until their definition is needed. So, we
12592 ignore interface specifications for
12593 compiler-generated functions. */
12594 && !DECL_ARTIFICIAL (decl1));
12596 if (DECL_INTERFACE_KNOWN (decl1))
12598 tree ctx = decl_function_context (decl1);
12600 if (DECL_NOT_REALLY_EXTERN (decl1))
12601 DECL_EXTERNAL (decl1) = 0;
12603 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
12604 && TREE_PUBLIC (ctx))
12605 /* This is a function in a local class in an extern inline
12607 comdat_linkage (decl1);
12609 /* If this function belongs to an interface, it is public.
12610 If it belongs to someone else's interface, it is also external.
12611 This only affects inlines and template instantiations. */
12612 else if (!finfo->interface_unknown && honor_interface)
12614 if (DECL_DECLARED_INLINE_P (decl1)
12615 || DECL_TEMPLATE_INSTANTIATION (decl1)
12616 || processing_template_decl)
12618 DECL_EXTERNAL (decl1)
12619 = (finfo->interface_only
12620 || (DECL_DECLARED_INLINE_P (decl1)
12621 && ! flag_implement_inlines
12622 && !DECL_VINDEX (decl1)));
12624 /* For WIN32 we also want to put these in linkonce sections. */
12625 maybe_make_one_only (decl1);
12628 DECL_EXTERNAL (decl1) = 0;
12629 DECL_INTERFACE_KNOWN (decl1) = 1;
12630 /* If this function is in an interface implemented in this file,
12631 make sure that the back end knows to emit this function
12633 if (!DECL_EXTERNAL (decl1))
12634 mark_needed (decl1);
12636 else if (finfo->interface_unknown && finfo->interface_only
12637 && honor_interface)
12639 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
12640 interface, we will have both finfo->interface_unknown and
12641 finfo->interface_only set. In that case, we don't want to
12642 use the normal heuristics because someone will supply a
12643 #pragma implementation elsewhere, and deducing it here would
12644 produce a conflict. */
12645 comdat_linkage (decl1);
12646 DECL_EXTERNAL (decl1) = 0;
12647 DECL_INTERFACE_KNOWN (decl1) = 1;
12648 DECL_DEFER_OUTPUT (decl1) = 1;
12652 /* This is a definition, not a reference.
12653 So clear DECL_EXTERNAL, unless this is a GNU extern inline. */
12654 if (!GNU_INLINE_P (decl1))
12655 DECL_EXTERNAL (decl1) = 0;
12657 if ((DECL_DECLARED_INLINE_P (decl1)
12658 || DECL_TEMPLATE_INSTANTIATION (decl1))
12659 && ! DECL_INTERFACE_KNOWN (decl1))
12660 DECL_DEFER_OUTPUT (decl1) = 1;
12662 DECL_INTERFACE_KNOWN (decl1) = 1;
12665 /* Determine the ELF visibility attribute for the function. We must not
12666 do this before calling "pushdecl", as we must allow "duplicate_decls"
12667 to merge any attributes appropriately. We also need to wait until
12669 if (!DECL_CLONED_FUNCTION_P (decl1))
12670 determine_visibility (decl1);
12672 begin_scope (sk_function_parms, decl1);
12676 if (DECL_DESTRUCTOR_P (decl1)
12677 || (DECL_CONSTRUCTOR_P (decl1)
12678 && targetm.cxx.cdtor_returns_this ()))
12680 cdtor_label = build_decl (input_location,
12681 LABEL_DECL, NULL_TREE, NULL_TREE);
12682 DECL_CONTEXT (cdtor_label) = current_function_decl;
12685 start_fname_decls ();
12687 store_parm_decls (current_function_parms);
12691 /* Like start_preparsed_function, except that instead of a
12692 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
12694 Returns 1 on success. If the DECLARATOR is not suitable for a function
12695 (it defines a datum instead), we return 0, which tells
12696 yyparse to report a parse error. */
12699 start_function (cp_decl_specifier_seq *declspecs,
12700 const cp_declarator *declarator,
12705 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
12706 if (decl1 == error_mark_node)
12708 /* If the declarator is not suitable for a function definition,
12709 cause a syntax error. */
12710 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
12712 error ("invalid function declaration");
12716 if (DECL_MAIN_P (decl1))
12717 /* main must return int. grokfndecl should have corrected it
12718 (and issued a diagnostic) if the user got it wrong. */
12719 gcc_assert (same_type_p (TREE_TYPE (TREE_TYPE (decl1)),
12720 integer_type_node));
12722 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
12727 /* Returns true iff an EH_SPEC_BLOCK should be created in the body of
12731 use_eh_spec_block (tree fn)
12733 return (flag_exceptions && flag_enforce_eh_specs
12734 && !processing_template_decl
12735 && !type_throw_all_p (TREE_TYPE (fn))
12736 /* We insert the EH_SPEC_BLOCK only in the original
12737 function; then, it is copied automatically to the
12739 && !DECL_CLONED_FUNCTION_P (fn)
12740 /* Implicitly-generated constructors and destructors have
12741 exception specifications. However, those specifications
12742 are the union of the possible exceptions specified by the
12743 constructors/destructors for bases and members, so no
12744 unallowed exception will ever reach this function. By
12745 not creating the EH_SPEC_BLOCK we save a little memory,
12746 and we avoid spurious warnings about unreachable
12748 && !DECL_ARTIFICIAL (fn));
12751 /* Store the parameter declarations into the current function declaration.
12752 This is called after parsing the parameter declarations, before
12753 digesting the body of the function.
12755 Also install to binding contour return value identifier, if any. */
12758 store_parm_decls (tree current_function_parms)
12760 tree fndecl = current_function_decl;
12763 /* This is a chain of any other decls that came in among the parm
12764 declarations. If a parm is declared with enum {foo, bar} x;
12765 then CONST_DECLs for foo and bar are put here. */
12766 tree nonparms = NULL_TREE;
12768 if (current_function_parms)
12770 /* This case is when the function was defined with an ANSI prototype.
12771 The parms already have decls, so we need not do anything here
12772 except record them as in effect
12773 and complain if any redundant old-style parm decls were written. */
12775 tree specparms = current_function_parms;
12778 /* Must clear this because it might contain TYPE_DECLs declared
12780 current_binding_level->names = NULL;
12782 /* If we're doing semantic analysis, then we'll call pushdecl
12783 for each of these. We must do them in reverse order so that
12784 they end in the correct forward order. */
12785 specparms = nreverse (specparms);
12787 for (parm = specparms; parm; parm = next)
12789 next = DECL_CHAIN (parm);
12790 if (TREE_CODE (parm) == PARM_DECL)
12792 if (DECL_NAME (parm) == NULL_TREE
12793 || TREE_CODE (parm) != VOID_TYPE)
12796 error ("parameter %qD declared void", parm);
12800 /* If we find an enum constant or a type tag,
12801 put it aside for the moment. */
12802 TREE_CHAIN (parm) = NULL_TREE;
12803 nonparms = chainon (nonparms, parm);
12807 /* Get the decls in their original chain order and record in the
12808 function. This is all and only the PARM_DECLs that were
12809 pushed into scope by the loop above. */
12810 DECL_ARGUMENTS (fndecl) = getdecls ();
12813 DECL_ARGUMENTS (fndecl) = NULL_TREE;
12815 /* Now store the final chain of decls for the arguments
12816 as the decl-chain of the current lexical scope.
12817 Put the enumerators in as well, at the front so that
12818 DECL_ARGUMENTS is not modified. */
12819 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
12821 if (use_eh_spec_block (current_function_decl))
12822 current_eh_spec_block = begin_eh_spec_block ();
12826 /* We have finished doing semantic analysis on DECL, but have not yet
12827 generated RTL for its body. Save away our current state, so that
12828 when we want to generate RTL later we know what to do. */
12831 save_function_data (tree decl)
12833 struct language_function *f;
12835 /* Save the language-specific per-function data so that we can
12836 get it back when we really expand this function. */
12837 gcc_assert (!DECL_PENDING_INLINE_P (decl));
12840 f = ggc_alloc_language_function ();
12841 memcpy (f, cp_function_chain, sizeof (struct language_function));
12842 DECL_SAVED_FUNCTION_DATA (decl) = f;
12844 /* Clear out the bits we don't need. */
12845 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
12846 f->bindings = NULL;
12847 f->x_local_names = NULL;
12851 /* Set the return value of the constructor (if present). */
12854 finish_constructor_body (void)
12859 if (targetm.cxx.cdtor_returns_this ()
12860 && (! TYPE_FOR_JAVA (current_class_type)))
12862 /* Any return from a constructor will end up here. */
12863 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12865 val = DECL_ARGUMENTS (current_function_decl);
12866 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12867 DECL_RESULT (current_function_decl), val);
12868 /* Return the address of the object. */
12869 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12870 add_stmt (exprstmt);
12874 /* Do all the processing for the beginning of a destructor; set up the
12875 vtable pointers and cleanups for bases and members. */
12878 begin_destructor_body (void)
12880 tree compound_stmt;
12882 /* If the CURRENT_CLASS_TYPE is incomplete, we will have already
12883 issued an error message. We still want to try to process the
12884 body of the function, but initialize_vtbl_ptrs will crash if
12885 TYPE_BINFO is NULL. */
12886 if (COMPLETE_TYPE_P (current_class_type))
12888 compound_stmt = begin_compound_stmt (0);
12889 /* Make all virtual function table pointers in non-virtual base
12890 classes point to CURRENT_CLASS_TYPE's virtual function
12892 initialize_vtbl_ptrs (current_class_ptr);
12893 finish_compound_stmt (compound_stmt);
12895 /* And insert cleanups for our bases and members so that they
12896 will be properly destroyed if we throw. */
12897 push_base_cleanups ();
12901 /* At the end of every destructor we generate code to delete the object if
12902 necessary. Do that now. */
12905 finish_destructor_body (void)
12909 /* Any return from a destructor will end up here; that way all base
12910 and member cleanups will be run when the function returns. */
12911 add_stmt (build_stmt (input_location, LABEL_EXPR, cdtor_label));
12913 /* In a virtual destructor, we must call delete. */
12914 if (DECL_VIRTUAL_P (current_function_decl))
12917 tree virtual_size = cxx_sizeof (current_class_type);
12921 At the point of definition of a virtual destructor (including
12922 an implicit definition), non-placement operator delete shall
12923 be looked up in the scope of the destructor's class and if
12924 found shall be accessible and unambiguous. */
12925 exprstmt = build_op_delete_call(DELETE_EXPR, current_class_ptr,
12927 /*global_p=*/false,
12928 /*placement=*/NULL_TREE,
12929 /*alloc_fn=*/NULL_TREE);
12931 if_stmt = begin_if_stmt ();
12932 finish_if_stmt_cond (build2 (BIT_AND_EXPR, integer_type_node,
12933 current_in_charge_parm,
12936 finish_expr_stmt (exprstmt);
12937 finish_then_clause (if_stmt);
12938 finish_if_stmt (if_stmt);
12941 if (targetm.cxx.cdtor_returns_this ())
12945 val = DECL_ARGUMENTS (current_function_decl);
12946 val = build2 (MODIFY_EXPR, TREE_TYPE (val),
12947 DECL_RESULT (current_function_decl), val);
12948 /* Return the address of the object. */
12949 exprstmt = build_stmt (input_location, RETURN_EXPR, val);
12950 add_stmt (exprstmt);
12954 /* Do the necessary processing for the beginning of a function body, which
12955 in this case includes member-initializers, but not the catch clauses of
12956 a function-try-block. Currently, this means opening a binding level
12957 for the member-initializers (in a ctor) and member cleanups (in a dtor). */
12960 begin_function_body (void)
12964 if (! FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
12967 if (processing_template_decl)
12968 /* Do nothing now. */;
12970 /* Always keep the BLOCK node associated with the outermost pair of
12971 curly braces of a function. These are needed for correct
12972 operation of dwarfout.c. */
12973 keep_next_level (true);
12975 stmt = begin_compound_stmt (BCS_FN_BODY);
12977 if (processing_template_decl)
12978 /* Do nothing now. */;
12979 else if (DECL_DESTRUCTOR_P (current_function_decl))
12980 begin_destructor_body ();
12985 /* Do the processing for the end of a function body. Currently, this means
12986 closing out the cleanups for fully-constructed bases and members, and in
12987 the case of the destructor, deleting the object if desired. Again, this
12988 is only meaningful for [cd]tors, since they are the only functions where
12989 there is a significant distinction between the main body and any
12990 function catch clauses. Handling, say, main() return semantics here
12991 would be wrong, as flowing off the end of a function catch clause for
12992 main() would also need to return 0. */
12995 finish_function_body (tree compstmt)
12997 if (compstmt == NULL_TREE)
13000 /* Close the block. */
13001 finish_compound_stmt (compstmt);
13003 if (processing_template_decl)
13004 /* Do nothing now. */;
13005 else if (DECL_CONSTRUCTOR_P (current_function_decl))
13006 finish_constructor_body ();
13007 else if (DECL_DESTRUCTOR_P (current_function_decl))
13008 finish_destructor_body ();
13011 /* Given a function, returns the BLOCK corresponding to the outermost level
13012 of curly braces, skipping the artificial block created for constructor
13016 outer_curly_brace_block (tree fndecl)
13018 tree block = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl));
13019 if (FUNCTION_NEEDS_BODY_BLOCK (current_function_decl))
13020 /* Skip the artificial function body block. */
13021 block = BLOCK_SUBBLOCKS (block);
13025 /* If FNDECL is a class's key method, add the class to the list of
13026 keyed classes that should be emitted. */
13029 record_key_method_defined (tree fndecl)
13031 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
13032 && DECL_VIRTUAL_P (fndecl)
13033 && !processing_template_decl)
13035 tree fnclass = DECL_CONTEXT (fndecl);
13036 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
13037 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
13041 /* Subroutine of finish_function.
13042 Save the body of constexpr functions for possible
13043 future compile time evaluation. */
13046 maybe_save_function_definition (tree fun)
13048 if (!processing_template_decl
13049 && DECL_DECLARED_CONSTEXPR_P (fun)
13050 && !DECL_CLONED_FUNCTION_P (fun))
13051 register_constexpr_fundef (fun, DECL_SAVED_TREE (fun));
13054 /* Finish up a function declaration and compile that function
13055 all the way to assembler language output. The free the storage
13056 for the function definition.
13058 FLAGS is a bitwise or of the following values:
13060 We just finished processing the body of an in-class inline
13061 function definition. (This processing will have taken place
13062 after the class definition is complete.) */
13065 finish_function (int flags)
13067 tree fndecl = current_function_decl;
13068 tree fntype, ctype = NULL_TREE;
13069 int inclass_inline = (flags & 2) != 0;
13071 /* When we get some parse errors, we can end up without a
13072 current_function_decl, so cope. */
13073 if (fndecl == NULL_TREE)
13074 return error_mark_node;
13076 if (c_dialect_objc ())
13077 objc_finish_function ();
13079 gcc_assert (!defer_mark_used_calls);
13080 defer_mark_used_calls = true;
13082 record_key_method_defined (fndecl);
13084 fntype = TREE_TYPE (fndecl);
13086 /* TREE_READONLY (fndecl) = 1;
13087 This caused &foo to be of type ptr-to-const-function
13088 which then got a warning when stored in a ptr-to-function variable. */
13090 gcc_assert (building_stmt_tree ());
13091 /* The current function is being defined, so its DECL_INITIAL should
13092 be set, and unless there's a multiple definition, it should be
13093 error_mark_node. */
13094 gcc_assert (DECL_INITIAL (fndecl) == error_mark_node);
13096 /* For a cloned function, we've already got all the code we need;
13097 there's no need to add any extra bits. */
13098 if (!DECL_CLONED_FUNCTION_P (fndecl))
13100 if (DECL_MAIN_P (current_function_decl))
13104 /* Make it so that `main' always returns 0 by default (or
13107 stmt = finish_return_stmt (integer_one_node);
13109 stmt = finish_return_stmt (integer_zero_node);
13111 /* Hack. We don't want the middle-end to warn that this
13112 return is unreachable, so put the statement on the
13115 location_t linezero = linemap_line_start (line_table, 0, 1);
13116 SET_EXPR_LOCATION (stmt, linezero);
13120 if (use_eh_spec_block (current_function_decl))
13121 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
13122 (TREE_TYPE (current_function_decl)),
13123 current_eh_spec_block);
13126 /* If we're saving up tree structure, tie off the function now. */
13127 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
13129 finish_fname_decls ();
13131 /* If this function can't throw any exceptions, remember that. */
13132 if (!processing_template_decl
13133 && !cp_function_chain->can_throw
13134 && !flag_non_call_exceptions
13135 && !decl_replaceable_p (fndecl))
13136 TREE_NOTHROW (fndecl) = 1;
13138 /* This must come after expand_function_end because cleanups might
13139 have declarations (from inline functions) that need to go into
13140 this function's blocks. */
13142 /* If the current binding level isn't the outermost binding level
13143 for this function, either there is a bug, or we have experienced
13144 syntax errors and the statement tree is malformed. */
13145 if (current_binding_level->kind != sk_function_parms)
13147 /* Make sure we have already experienced errors. */
13148 gcc_assert (errorcount);
13150 /* Throw away the broken statement tree and extra binding
13152 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
13154 while (current_binding_level->kind != sk_function_parms)
13156 if (current_binding_level->kind == sk_class)
13157 pop_nested_class ();
13159 poplevel (0, 0, 0);
13162 poplevel (1, 0, 1);
13164 /* Statements should always be full-expressions at the outermost set
13165 of curly braces for a function. */
13166 gcc_assert (stmts_are_full_exprs_p ());
13168 /* Save constexpr function body before it gets munged by
13169 the NRV transformation. */
13170 maybe_save_function_definition (fndecl);
13172 /* Set up the named return value optimization, if we can. Candidate
13173 variables are selected in check_return_expr. */
13174 if (current_function_return_value)
13176 tree r = current_function_return_value;
13179 if (r != error_mark_node
13180 /* This is only worth doing for fns that return in memory--and
13181 simpler, since we don't have to worry about promoted modes. */
13182 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
13183 /* Only allow this for variables declared in the outer scope of
13184 the function so we know that their lifetime always ends with a
13185 return; see g++.dg/opt/nrv6.C. We could be more flexible if
13186 we were to do this optimization in tree-ssa. */
13187 && (outer = outer_curly_brace_block (fndecl))
13188 && chain_member (r, BLOCK_VARS (outer)))
13189 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
13191 current_function_return_value = NULL_TREE;
13194 /* Remember that we were in class scope. */
13195 if (current_class_name)
13196 ctype = current_class_type;
13198 /* Must mark the RESULT_DECL as being in this function. */
13199 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
13201 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
13202 to the FUNCTION_DECL node itself. */
13203 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
13205 /* Save away current state, if appropriate. */
13206 if (!processing_template_decl)
13207 save_function_data (fndecl);
13209 /* Complain if there's just no return statement. */
13210 if (warn_return_type
13211 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
13212 && !dependent_type_p (TREE_TYPE (fntype))
13213 && !current_function_returns_value && !current_function_returns_null
13214 /* Don't complain if we abort or throw. */
13215 && !current_function_returns_abnormally
13216 /* Don't complain if we are declared noreturn. */
13217 && !TREE_THIS_VOLATILE (fndecl)
13218 && !DECL_NAME (DECL_RESULT (fndecl))
13219 && !TREE_NO_WARNING (fndecl)
13220 /* Structor return values (if any) are set by the compiler. */
13221 && !DECL_CONSTRUCTOR_P (fndecl)
13222 && !DECL_DESTRUCTOR_P (fndecl))
13224 warning (OPT_Wreturn_type,
13225 "no return statement in function returning non-void");
13226 TREE_NO_WARNING (fndecl) = 1;
13229 /* Store the end of the function, so that we get good line number
13230 info for the epilogue. */
13231 cfun->function_end_locus = input_location;
13233 /* Complain about parameters that are only set, but never otherwise used. */
13234 if (warn_unused_but_set_parameter
13235 && !processing_template_decl
13236 && errorcount == unused_but_set_errorcount
13237 && !DECL_CLONED_FUNCTION_P (fndecl))
13241 for (decl = DECL_ARGUMENTS (fndecl);
13243 decl = DECL_CHAIN (decl))
13244 if (TREE_USED (decl)
13245 && TREE_CODE (decl) == PARM_DECL
13246 && !DECL_READ_P (decl)
13247 && DECL_NAME (decl)
13248 && !DECL_ARTIFICIAL (decl)
13249 && !TREE_NO_WARNING (decl)
13250 && !DECL_IN_SYSTEM_HEADER (decl)
13251 && TREE_TYPE (decl) != error_mark_node
13252 && TREE_CODE (TREE_TYPE (decl)) != REFERENCE_TYPE
13253 && (!CLASS_TYPE_P (TREE_TYPE (decl))
13254 || !TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TREE_TYPE (decl))))
13255 warning (OPT_Wunused_but_set_parameter,
13256 "parameter %q+D set but not used", decl);
13257 unused_but_set_errorcount = errorcount;
13260 /* Genericize before inlining. */
13261 if (!processing_template_decl)
13263 struct language_function *f = DECL_SAVED_FUNCTION_DATA (fndecl);
13264 invoke_plugin_callbacks (PLUGIN_PRE_GENERICIZE, fndecl);
13265 cp_genericize (fndecl);
13266 /* Clear out the bits we don't need. */
13267 f->x_current_class_ptr = NULL;
13268 f->x_current_class_ref = NULL;
13269 f->x_eh_spec_block = NULL;
13270 f->x_in_charge_parm = NULL;
13271 f->x_vtt_parm = NULL;
13272 f->x_return_value = NULL;
13273 f->bindings = NULL;
13274 f->extern_decl_map = NULL;
13276 /* Clear out the bits we don't need. */
13277 local_names = NULL;
13279 /* We're leaving the context of this function, so zap cfun. It's still in
13280 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
13282 current_function_decl = NULL;
13284 /* If this is an in-class inline definition, we may have to pop the
13285 bindings for the template parameters that we added in
13286 maybe_begin_member_template_processing when start_function was
13288 if (inclass_inline)
13289 maybe_end_member_template_processing ();
13291 /* Leave the scope of the class. */
13293 pop_nested_class ();
13298 current_function_decl = NULL_TREE;
13300 defer_mark_used_calls = false;
13301 if (deferred_mark_used_calls)
13306 FOR_EACH_VEC_ELT (tree, deferred_mark_used_calls, i, decl)
13308 VEC_free (tree, gc, deferred_mark_used_calls);
13314 /* Create the FUNCTION_DECL for a function definition.
13315 DECLSPECS and DECLARATOR are the parts of the declaration;
13316 they describe the return type and the name of the function,
13317 but twisted together in a fashion that parallels the syntax of C.
13319 This function creates a binding context for the function body
13320 as well as setting up the FUNCTION_DECL in current_function_decl.
13322 Returns a FUNCTION_DECL on success.
13324 If the DECLARATOR is not suitable for a function (it defines a datum
13325 instead), we return 0, which tells yyparse to report a parse error.
13327 May return void_type_node indicating that this method is actually
13328 a friend. See grokfield for more details.
13330 Came here with a `.pushlevel' .
13332 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
13333 CHANGES TO CODE IN `grokfield'. */
13336 grokmethod (cp_decl_specifier_seq *declspecs,
13337 const cp_declarator *declarator, tree attrlist)
13339 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
13342 if (fndecl == error_mark_node)
13343 return error_mark_node;
13345 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
13347 error ("invalid member function declaration");
13348 return error_mark_node;
13352 cplus_decl_attributes (&fndecl, attrlist, 0);
13354 /* Pass friends other than inline friend functions back. */
13355 if (fndecl == void_type_node)
13358 if (DECL_IN_AGGR_P (fndecl))
13360 if (DECL_CLASS_SCOPE_P (fndecl))
13361 error ("%qD is already defined in class %qT", fndecl,
13362 DECL_CONTEXT (fndecl));
13363 return error_mark_node;
13366 check_template_shadow (fndecl);
13368 DECL_DECLARED_INLINE_P (fndecl) = 1;
13369 DECL_NO_INLINE_WARNING_P (fndecl) = 1;
13371 /* We process method specializations in finish_struct_1. */
13372 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
13374 fndecl = push_template_decl (fndecl);
13375 if (fndecl == error_mark_node)
13379 if (! DECL_FRIEND_P (fndecl))
13381 if (DECL_CHAIN (fndecl))
13383 fndecl = copy_node (fndecl);
13384 TREE_CHAIN (fndecl) = NULL_TREE;
13388 cp_finish_decl (fndecl, NULL_TREE, false, NULL_TREE, 0);
13390 DECL_IN_AGGR_P (fndecl) = 1;
13395 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
13396 we can lay it out later, when and if its type becomes complete. */
13399 maybe_register_incomplete_var (tree var)
13401 gcc_assert (TREE_CODE (var) == VAR_DECL);
13403 /* Keep track of variables with incomplete types. */
13404 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
13405 && DECL_EXTERNAL (var))
13407 tree inner_type = TREE_TYPE (var);
13409 while (TREE_CODE (inner_type) == ARRAY_TYPE)
13410 inner_type = TREE_TYPE (inner_type);
13411 inner_type = TYPE_MAIN_VARIANT (inner_type);
13413 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
13414 /* RTTI TD entries are created while defining the type_info. */
13415 || (TYPE_LANG_SPECIFIC (inner_type)
13416 && TYPE_BEING_DEFINED (inner_type)))
13419 = VEC_safe_push (incomplete_var, gc, incomplete_vars, NULL);
13421 iv->incomplete_type = inner_type;
13426 /* Called when a class type (given by TYPE) is defined. If there are
13427 any existing VAR_DECLs whose type has been completed by this
13428 declaration, update them now. */
13431 complete_vars (tree type)
13434 incomplete_var *iv;
13436 for (ix = 0; VEC_iterate (incomplete_var, incomplete_vars, ix, iv); )
13438 if (same_type_p (type, iv->incomplete_type))
13440 tree var = iv->decl;
13441 tree type = TREE_TYPE (var);
13442 /* Complete the type of the variable. The VAR_DECL itself
13443 will be laid out in expand_expr. */
13444 complete_type (type);
13445 cp_apply_type_quals_to_decl (cp_type_quals (type), var);
13446 /* Remove this entry from the list. */
13447 VEC_unordered_remove (incomplete_var, incomplete_vars, ix);
13453 /* Check for pending declarations which may have abstract type. */
13454 complete_type_check_abstract (type);
13457 /* If DECL is of a type which needs a cleanup, build and return an
13458 expression to perform that cleanup here. Return NULL_TREE if no
13459 cleanup need be done. */
13462 cxx_maybe_build_cleanup (tree decl, tsubst_flags_t complain)
13468 /* Assume no cleanup is required. */
13469 cleanup = NULL_TREE;
13471 if (error_operand_p (decl))
13474 /* Handle "__attribute__((cleanup))". We run the cleanup function
13475 before the destructor since the destructor is what actually
13476 terminates the lifetime of the object. */
13477 attr = lookup_attribute ("cleanup", DECL_ATTRIBUTES (decl));
13484 /* Get the name specified by the user for the cleanup function. */
13485 id = TREE_VALUE (TREE_VALUE (attr));
13486 /* Look up the name to find the cleanup function to call. It is
13487 important to use lookup_name here because that is what is
13488 used in c-common.c:handle_cleanup_attribute when performing
13489 initial checks on the attribute. Note that those checks
13490 include ensuring that the function found is not an overloaded
13491 function, or an object with an overloaded call operator,
13492 etc.; we can rely on the fact that the function found is an
13493 ordinary FUNCTION_DECL. */
13494 fn = lookup_name (id);
13495 arg = build_address (decl);
13497 cleanup = cp_build_function_call_nary (fn, complain, arg, NULL_TREE);
13498 if (cleanup == error_mark_node)
13499 return error_mark_node;
13501 /* Handle ordinary C++ destructors. */
13502 type = TREE_TYPE (decl);
13503 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
13505 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
13506 bool has_vbases = (TREE_CODE (type) == RECORD_TYPE
13507 && CLASSTYPE_VBASECLASSES (type));
13511 if (TREE_CODE (type) == ARRAY_TYPE)
13514 addr = build_address (decl);
13516 /* Optimize for space over speed here. */
13517 if (!has_vbases || flag_expensive_optimizations)
13518 flags |= LOOKUP_NONVIRTUAL;
13520 call = build_delete (TREE_TYPE (addr), addr,
13521 sfk_complete_destructor, flags, 0, complain);
13522 if (call == error_mark_node)
13523 cleanup = error_mark_node;
13525 cleanup = cp_build_compound_expr (cleanup, call, complain);
13533 /* When a stmt has been parsed, this function is called. */
13540 /* Return the FUNCTION_TYPE that corresponds to MEMFNTYPE, which can be a
13541 FUNCTION_DECL, METHOD_TYPE, FUNCTION_TYPE, pointer or reference to
13542 METHOD_TYPE or FUNCTION_TYPE, or pointer to member function. */
13545 static_fn_type (tree memfntype)
13550 if (TYPE_PTRMEMFUNC_P (memfntype))
13551 memfntype = TYPE_PTRMEMFUNC_FN_TYPE (memfntype);
13552 if (POINTER_TYPE_P (memfntype)
13553 || TREE_CODE (memfntype) == FUNCTION_DECL)
13554 memfntype = TREE_TYPE (memfntype);
13555 if (TREE_CODE (memfntype) == FUNCTION_TYPE)
13557 gcc_assert (TREE_CODE (memfntype) == METHOD_TYPE);
13558 args = TYPE_ARG_TYPES (memfntype);
13559 fntype = build_function_type (TREE_TYPE (memfntype), TREE_CHAIN (args));
13560 fntype = apply_memfn_quals (fntype, type_memfn_quals (memfntype));
13561 fntype = (cp_build_type_attribute_variant
13562 (fntype, TYPE_ATTRIBUTES (memfntype)));
13563 fntype = (build_exception_variant
13564 (fntype, TYPE_RAISES_EXCEPTIONS (memfntype)));
13568 /* DECL was originally constructed as a non-static member function,
13569 but turned out to be static. Update it accordingly. */
13572 revert_static_member_fn (tree decl)
13574 tree stype = static_fn_type (decl);
13576 if (type_memfn_quals (stype) != TYPE_UNQUALIFIED)
13578 error ("static member function %q#D declared with type qualifiers", decl);
13579 stype = apply_memfn_quals (stype, TYPE_UNQUALIFIED);
13581 TREE_TYPE (decl) = stype;
13583 if (DECL_ARGUMENTS (decl))
13584 DECL_ARGUMENTS (decl) = DECL_CHAIN (DECL_ARGUMENTS (decl));
13585 DECL_STATIC_FUNCTION_P (decl) = 1;
13588 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
13589 one of the language-independent trees. */
13591 enum cp_tree_node_structure_enum
13592 cp_tree_node_structure (union lang_tree_node * t)
13594 switch (TREE_CODE (&t->generic))
13596 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
13597 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
13598 case OVERLOAD: return TS_CP_OVERLOAD;
13599 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
13600 case PTRMEM_CST: return TS_CP_PTRMEM;
13601 case BASELINK: return TS_CP_BASELINK;
13602 case STATIC_ASSERT: return TS_CP_STATIC_ASSERT;
13603 case ARGUMENT_PACK_SELECT: return TS_CP_ARGUMENT_PACK_SELECT;
13604 case TRAIT_EXPR: return TS_CP_TRAIT_EXPR;
13605 case LAMBDA_EXPR: return TS_CP_LAMBDA_EXPR;
13606 case TEMPLATE_INFO: return TS_CP_TEMPLATE_INFO;
13607 default: return TS_CP_GENERIC;
13611 /* Build the void_list_node (void_type_node having been created). */
13613 build_void_list_node (void)
13615 tree t = build_tree_list (NULL_TREE, void_type_node);
13620 cp_missing_noreturn_ok_p (tree decl)
13622 /* A missing noreturn is ok for the `main' function. */
13623 return DECL_MAIN_P (decl);
13626 /* Return the COMDAT group into which DECL should be placed. */
13629 cxx_comdat_group (tree decl)
13633 /* Virtual tables, construction virtual tables, and virtual table
13634 tables all go in a single COMDAT group, named after the primary
13636 if (TREE_CODE (decl) == VAR_DECL && DECL_VTABLE_OR_VTT_P (decl))
13637 name = DECL_ASSEMBLER_NAME (CLASSTYPE_VTABLES (DECL_CONTEXT (decl)));
13638 /* For all other DECLs, the COMDAT group is the mangled name of the
13639 declaration itself. */
13642 while (DECL_THUNK_P (decl))
13644 /* If TARGET_USE_LOCAL_THUNK_ALIAS_P, use_thunk puts the thunk
13645 into the same section as the target function. In that case
13646 we must return target's name. */
13647 tree target = THUNK_TARGET (decl);
13648 if (TARGET_USE_LOCAL_THUNK_ALIAS_P (target)
13649 && DECL_SECTION_NAME (target) != NULL
13650 && DECL_ONE_ONLY (target))
13655 name = DECL_ASSEMBLER_NAME (decl);
13661 #include "gt-cp-decl.h"