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 Free Software Foundation, Inc.
4 Contributed by Michael Tiemann (tiemann@cygnus.com)
6 This file is part of GCC.
8 GCC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GCC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GCC; see the file COPYING. If not, write to
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
24 /* Process declarations and symbol lookup for C++ front end.
25 Also constructs types; the standard scalar types at initialization,
26 and structure, union, array and enum types when they are declared. */
28 /* ??? not all decl nodes are given the most useful possible
29 line numbers. For example, the CONST_DECLs for enum values. */
33 #include "coretypes.h"
40 #include "tree-inline.h"
50 #include "diagnostic.h"
53 #include "tree-flow.h"
55 static tree grokparms (cp_parameter_declarator *, tree *);
56 static const char *redeclaration_error_message (tree, tree);
58 static int decl_jump_unsafe (tree);
59 static void require_complete_types_for_parms (tree);
60 static int ambi_op_p (enum tree_code);
61 static int unary_op_p (enum tree_code);
62 static void push_local_name (tree);
63 static tree grok_reference_init (tree, tree, tree, tree *);
64 static tree grokfndecl (tree, tree, tree, tree, tree, int,
65 enum overload_flags, cp_cv_quals,
66 tree, int, int, int, int, int, int, tree);
67 static tree grokvardecl (tree, tree, const cp_decl_specifier_seq *,
69 static void record_unknown_type (tree, const char *);
70 static tree builtin_function_1 (const char *, tree, tree, int,
71 enum built_in_class, const char *,
73 static tree build_library_fn_1 (tree, enum tree_code, tree);
74 static int member_function_or_else (tree, tree, enum overload_flags);
75 static void bad_specifiers (tree, const char *, int, int, int, int,
77 static void check_for_uninitialized_const_var (tree);
78 static hashval_t typename_hash (const void *);
79 static int typename_compare (const void *, const void *);
80 static tree local_variable_p_walkfn (tree *, int *, void *);
81 static tree record_builtin_java_type (const char *, int);
82 static const char *tag_name (enum tag_types code);
83 static int walk_namespaces_r (tree, walk_namespaces_fn, void *);
84 static int walk_globals_r (tree, void*);
85 static int walk_vtables_r (tree, void*);
86 static tree make_label_decl (tree, int);
87 static void use_label (tree);
88 static void check_previous_goto_1 (tree, struct cp_binding_level *, tree,
90 static void check_previous_goto (struct named_label_use_list *);
91 static void check_switch_goto (struct cp_binding_level *);
92 static void check_previous_gotos (tree);
93 static void pop_label (tree, tree);
94 static void pop_labels (tree);
95 static void maybe_deduce_size_from_array_init (tree, tree);
96 static void layout_var_decl (tree);
97 static void maybe_commonize_var (tree);
98 static tree check_initializer (tree, tree, int, tree *);
99 static void make_rtl_for_nonlocal_decl (tree, tree, const char *);
100 static void save_function_data (tree);
101 static void check_function_type (tree, tree);
102 static void begin_constructor_body (void);
103 static void finish_constructor_body (void);
104 static void begin_destructor_body (void);
105 static void finish_destructor_body (void);
106 static tree create_array_type_for_decl (tree, tree, tree);
107 static tree get_atexit_node (void);
108 static tree get_dso_handle_node (void);
109 static tree start_cleanup_fn (void);
110 static void end_cleanup_fn (void);
111 static tree cp_make_fname_decl (tree, int);
112 static void initialize_predefined_identifiers (void);
113 static tree check_special_function_return_type
114 (special_function_kind, tree, tree);
115 static tree push_cp_library_fn (enum tree_code, tree);
116 static tree build_cp_library_fn (tree, enum tree_code, tree);
117 static void store_parm_decls (tree);
118 static void initialize_local_var (tree, tree);
119 static void expand_static_init (tree, tree);
120 static tree next_initializable_field (tree);
121 static tree reshape_init (tree, tree *);
122 static tree build_typename_type (tree, tree, tree);
124 /* Erroneous argument lists can use this *IFF* they do not modify it. */
125 tree error_mark_list;
127 /* The following symbols are subsumed in the cp_global_trees array, and
128 listed here individually for documentation purposes.
131 tree wchar_decl_node;
133 tree vtable_entry_type;
134 tree delta_type_node;
135 tree __t_desc_type_node;
136 tree ti_desc_type_node;
137 tree bltn_desc_type_node, ptr_desc_type_node;
138 tree ary_desc_type_node, func_desc_type_node, enum_desc_type_node;
139 tree class_desc_type_node, si_class_desc_type_node, vmi_class_desc_type_node;
140 tree ptm_desc_type_node;
141 tree base_desc_type_node;
143 tree class_type_node;
144 tree unknown_type_node;
146 Array type `vtable_entry_type[]'
149 tree vtbl_ptr_type_node;
156 A FUNCTION_DECL which can call `abort'. Not necessarily the
157 one that the user will declare, but sufficient to be called
158 by routines that want to abort the program.
162 The FUNCTION_DECL for the default `::operator delete'.
164 tree global_delete_fndecl;
167 tree type_info_type_node, tinfo_decl_id, tinfo_decl_type;
172 tree cp_global_trees[CPTI_MAX];
174 /* Indicates that there is a type value in some namespace, although
175 that is not necessarily in scope at the moment. */
177 tree global_type_node;
179 /* The node that holds the "name" of the global scope. */
180 tree global_scope_name;
182 /* Used only for jumps to as-yet undefined labels, since jumps to
183 defined labels can have their validity checked immediately. */
185 struct named_label_use_list GTY(())
187 struct cp_binding_level *binding_level;
190 location_t o_goto_locus;
191 struct named_label_use_list *next;
194 #define named_label_uses cp_function_chain->x_named_label_uses
196 #define local_names cp_function_chain->x_local_names
198 /* A list of objects which have constructors or destructors
199 which reside in the global scope. The decl is stored in
200 the TREE_VALUE slot and the initializer is stored
201 in the TREE_PURPOSE slot. */
202 tree static_aggregates;
206 /* A node for the integer constants 2, and 3. */
208 tree integer_two_node, integer_three_node;
210 /* A list of all LABEL_DECLs in the function that have names. Here so
211 we can clear out their names' definitions at the end of the
212 function, and so we can check the validity of jumps to these labels. */
214 struct named_label_list GTY(())
216 struct cp_binding_level *binding_level;
221 struct named_label_list *next;
222 unsigned int in_try_scope : 1;
223 unsigned int in_catch_scope : 1;
226 #define named_labels cp_function_chain->x_named_labels
228 /* The number of function bodies which we are currently processing.
229 (Zero if we are at namespace scope, one inside the body of a
230 function, two inside the body of a function in a local class, etc.) */
233 /* States indicating how grokdeclarator() should handle declspecs marked
234 with __attribute__((deprecated)). An object declared as
235 __attribute__((deprecated)) suppresses warnings of uses of other
238 enum deprecated_states {
243 static enum deprecated_states deprecated_state = DEPRECATED_NORMAL;
245 /* True if a declaration with an `extern' linkage specifier is being
247 bool have_extern_spec;
250 /* A TREE_LIST of VAR_DECLs. The TREE_PURPOSE is a RECORD_TYPE or
251 UNION_TYPE; the TREE_VALUE is a VAR_DECL with that type. At the
252 time the VAR_DECL was declared, the type was incomplete. */
254 static GTY(()) tree incomplete_vars;
256 /* Returns the kind of template specialization we are currently
257 processing, given that it's declaration contained N_CLASS_SCOPES
258 explicit scope qualifications. */
261 current_tmpl_spec_kind (int n_class_scopes)
263 int n_template_parm_scopes = 0;
264 int seen_specialization_p = 0;
265 int innermost_specialization_p = 0;
266 struct cp_binding_level *b;
268 /* Scan through the template parameter scopes. */
269 for (b = current_binding_level;
270 b->kind == sk_template_parms;
273 /* If we see a specialization scope inside a parameter scope,
274 then something is wrong. That corresponds to a declaration
277 template <class T> template <> ...
279 which is always invalid since [temp.expl.spec] forbids the
280 specialization of a class member template if the enclosing
281 class templates are not explicitly specialized as well. */
282 if (b->explicit_spec_p)
284 if (n_template_parm_scopes == 0)
285 innermost_specialization_p = 1;
287 seen_specialization_p = 1;
289 else if (seen_specialization_p == 1)
290 return tsk_invalid_member_spec;
292 ++n_template_parm_scopes;
295 /* Handle explicit instantiations. */
296 if (processing_explicit_instantiation)
298 if (n_template_parm_scopes != 0)
299 /* We've seen a template parameter list during an explicit
300 instantiation. For example:
302 template <class T> template void f(int);
304 This is erroneous. */
305 return tsk_invalid_expl_inst;
307 return tsk_expl_inst;
310 if (n_template_parm_scopes < n_class_scopes)
311 /* We've not seen enough template headers to match all the
312 specialized classes present. For example:
314 template <class T> void R<T>::S<T>::f(int);
316 This is invalid; there needs to be one set of template
317 parameters for each class. */
318 return tsk_insufficient_parms;
319 else if (n_template_parm_scopes == n_class_scopes)
320 /* We're processing a non-template declaration (even though it may
321 be a member of a template class.) For example:
323 template <class T> void S<T>::f(int);
325 The `class T' maches the `S<T>', leaving no template headers
326 corresponding to the `f'. */
328 else if (n_template_parm_scopes > n_class_scopes + 1)
329 /* We've got too many template headers. For example:
331 template <> template <class T> void f (T);
333 There need to be more enclosing classes. */
334 return tsk_excessive_parms;
336 /* This must be a template. It's of the form:
338 template <class T> template <class U> void S<T>::f(U);
340 This is a specialization if the innermost level was a
341 specialization; otherwise it's just a definition of the
343 return innermost_specialization_p ? tsk_expl_spec : tsk_template;
346 /* Exit the current scope. */
354 /* When a label goes out of scope, check to see if that label was used
355 in a valid manner, and issue any appropriate warnings or errors. */
358 pop_label (tree label, tree old_value)
360 if (!processing_template_decl)
362 if (DECL_INITIAL (label) == NULL_TREE)
366 cp_error_at ("label `%D' used but not defined", label);
367 #ifdef USE_MAPPED_LOCATION
368 location = input_location; /* FIXME want (input_filename, (line)0) */
370 location.file = input_filename;
373 /* Avoid crashing later. */
374 define_label (location, DECL_NAME (label));
376 else if (warn_unused_label && !TREE_USED (label))
377 cp_warning_at ("label `%D' defined but not used", label);
380 SET_IDENTIFIER_LABEL_VALUE (DECL_NAME (label), old_value);
383 /* At the end of a function, all labels declared within the function
384 go out of scope. BLOCK is the top-level block for the
388 pop_labels (tree block)
390 struct named_label_list *link;
392 /* Clear out the definitions of all label names, since their scopes
394 for (link = named_labels; link; link = link->next)
396 pop_label (link->label_decl, link->old_value);
397 /* Put the labels into the "variables" of the top-level block,
398 so debugger can see them. */
399 TREE_CHAIN (link->label_decl) = BLOCK_VARS (block);
400 BLOCK_VARS (block) = link->label_decl;
406 /* Exit a binding level.
407 Pop the level off, and restore the state of the identifier-decl mappings
408 that were in effect when this level was entered.
410 If KEEP == 1, this level had explicit declarations, so
411 and create a "block" (a BLOCK node) for the level
412 to record its declarations and subblocks for symbol table output.
414 If FUNCTIONBODY is nonzero, this level is the body of a function,
415 so create a block as if KEEP were set and also clear out all
418 If REVERSE is nonzero, reverse the order of decls before putting
419 them into the BLOCK. */
422 poplevel (int keep, int reverse, int functionbody)
425 /* The chain of decls was accumulated in reverse order.
426 Put it into forward order, just for cleanliness. */
428 int tmp = functionbody;
429 int real_functionbody;
433 int leaving_for_scope;
436 timevar_push (TV_NAME_LOOKUP);
441 my_friendly_assert (current_binding_level->kind != sk_class, 19990916);
443 real_functionbody = (current_binding_level->kind == sk_cleanup
444 ? ((functionbody = 0), tmp) : functionbody);
445 subblocks = functionbody >= 0 ? current_binding_level->blocks : 0;
447 my_friendly_assert (VEC_length(cp_class_binding,
448 current_binding_level->class_shadowed) == 0,
451 /* We used to use KEEP == 2 to indicate that the new block should go
452 at the beginning of the list of blocks at this binding level,
453 rather than the end. This hack is no longer used. */
454 my_friendly_assert (keep == 0 || keep == 1, 0);
456 if (current_binding_level->keep)
459 /* Any uses of undefined labels, and any defined labels, now operate
460 under constraints of next binding contour. */
461 if (cfun && !functionbody)
463 struct cp_binding_level *level_chain;
464 level_chain = current_binding_level->level_chain;
467 struct named_label_use_list *uses;
468 struct named_label_list *labels;
469 for (labels = named_labels; labels; labels = labels->next)
470 if (labels->binding_level == current_binding_level)
473 if (current_binding_level->kind == sk_try)
474 labels->in_try_scope = 1;
475 if (current_binding_level->kind == sk_catch)
476 labels->in_catch_scope = 1;
477 for (decl = labels->names_in_scope; decl;
478 decl = TREE_CHAIN (decl))
479 if (decl_jump_unsafe (decl))
480 labels->bad_decls = tree_cons (NULL_TREE, decl,
482 labels->binding_level = level_chain;
483 labels->names_in_scope = level_chain->names;
486 for (uses = named_label_uses; uses; uses = uses->next)
487 if (uses->binding_level == current_binding_level)
489 uses->binding_level = level_chain;
490 uses->names_in_scope = level_chain->names;
495 /* Get the decls in the order they were written.
496 Usually current_binding_level->names is in reverse order.
497 But parameter decls were previously put in forward order. */
500 current_binding_level->names
501 = decls = nreverse (current_binding_level->names);
503 decls = current_binding_level->names;
505 /* When not in function-at-a-time mode, expand_end_bindings will
506 warn about unused variables. But, in function-at-a-time mode
507 expand_end_bindings is not passed the list of variables in the
508 current scope, and therefore no warning is emitted. So, we
509 explicitly warn here. */
510 if (!processing_template_decl)
511 warn_about_unused_variables (getdecls ());
513 /* If there were any declarations or structure tags in that level,
514 or if this level is a function body,
515 create a BLOCK to record them for the life of this function. */
517 if (keep == 1 || functionbody)
518 block = make_node (BLOCK);
519 if (block != NULL_TREE)
521 BLOCK_VARS (block) = decls;
522 BLOCK_SUBBLOCKS (block) = subblocks;
525 /* In each subblock, record that this is its superior. */
527 for (link = subblocks; link; link = TREE_CHAIN (link))
528 BLOCK_SUPERCONTEXT (link) = block;
530 /* We still support the old for-scope rules, whereby the variables
531 in a for-init statement were in scope after the for-statement
532 ended. We only use the new rules if flag_new_for_scope is
535 = current_binding_level->kind == sk_for && flag_new_for_scope == 1;
537 /* Remove declarations for all the DECLs in this level. */
538 for (link = decls; link; link = TREE_CHAIN (link))
540 if (leaving_for_scope && TREE_CODE (link) == VAR_DECL
543 tree name = DECL_NAME (link);
547 ob = outer_binding (name,
548 IDENTIFIER_BINDING (name),
551 ns_binding = IDENTIFIER_NAMESPACE_VALUE (name);
553 ns_binding = NULL_TREE;
555 if (ob && ob->scope == current_binding_level->level_chain)
556 /* We have something like:
561 and we are leaving the `for' scope. There's no reason to
562 keep the binding of the inner `i' in this case. */
563 pop_binding (name, link);
564 else if ((ob && (TREE_CODE (ob->value) == TYPE_DECL))
565 || (ns_binding && TREE_CODE (ns_binding) == TYPE_DECL))
566 /* Here, we have something like:
574 We must pop the for-scope binding so we know what's a
575 type and what isn't. */
576 pop_binding (name, link);
579 /* Mark this VAR_DECL as dead so that we can tell we left it
580 there only for backward compatibility. */
581 DECL_DEAD_FOR_LOCAL (link) = 1;
583 /* Keep track of what should have happened when we
584 popped the binding. */
586 DECL_SHADOWED_FOR_VAR (link) = ob->value;
588 /* Add it to the list of dead variables in the next
589 outermost binding to that we can remove these when we
590 leave that binding. */
591 current_binding_level->level_chain->dead_vars_from_for
592 = tree_cons (NULL_TREE, link,
593 current_binding_level->level_chain->
596 /* Although we don't pop the cxx_binding, we do clear
597 its SCOPE since the scope is going away now. */
598 IDENTIFIER_BINDING (name)->scope
599 = current_binding_level->level_chain;
604 /* Remove the binding. */
606 if (TREE_CODE (decl) == TREE_LIST)
607 decl = TREE_VALUE (decl);
609 pop_binding (DECL_NAME (decl), decl);
610 else if (TREE_CODE (decl) == OVERLOAD)
611 pop_binding (DECL_NAME (OVL_FUNCTION (decl)), decl);
617 /* Remove declarations for any `for' variables from inner scopes
618 that we kept around. */
619 for (link = current_binding_level->dead_vars_from_for;
620 link; link = TREE_CHAIN (link))
621 pop_binding (DECL_NAME (TREE_VALUE (link)), TREE_VALUE (link));
623 /* Restore the IDENTIFIER_TYPE_VALUEs. */
624 for (link = current_binding_level->type_shadowed;
625 link; link = TREE_CHAIN (link))
626 SET_IDENTIFIER_TYPE_VALUE (TREE_PURPOSE (link), TREE_VALUE (link));
628 /* Restore the IDENTIFIER_LABEL_VALUEs for local labels. */
629 for (link = current_binding_level->shadowed_labels;
631 link = TREE_CHAIN (link))
632 pop_label (TREE_VALUE (link), TREE_PURPOSE (link));
634 /* There may be OVERLOADs (wrapped in TREE_LISTs) on the BLOCK_VARs
635 list if a `using' declaration put them there. The debugging
636 back-ends won't understand OVERLOAD, so we remove them here.
637 Because the BLOCK_VARS are (temporarily) shared with
638 CURRENT_BINDING_LEVEL->NAMES we must do this fixup after we have
639 popped all the bindings. */
644 for (d = &BLOCK_VARS (block); *d; )
646 if (TREE_CODE (*d) == TREE_LIST)
647 *d = TREE_CHAIN (*d);
649 d = &TREE_CHAIN (*d);
653 /* If the level being exited is the top level of a function,
654 check over all the labels. */
657 /* Since this is the top level block of a function, the vars are
658 the function's parameters. Don't leave them in the BLOCK
659 because they are found in the FUNCTION_DECL instead. */
660 BLOCK_VARS (block) = 0;
664 kind = current_binding_level->kind;
665 if (kind == sk_cleanup)
669 /* If this is a temporary binding created for a cleanup, then we'll
670 have pushed a statement list level. Pop that, create a new
671 BIND_EXPR for the block, and insert it into the stream. */
672 stmt = pop_stmt_list (current_binding_level->statement_list);
673 stmt = c_build_bind_expr (block, stmt);
679 DECL_INITIAL (current_function_decl) = block;
681 current_binding_level->blocks
682 = chainon (current_binding_level->blocks, block);
684 /* If we did not make a block for the level just exited,
685 any blocks made for inner levels
686 (since they cannot be recorded as subblocks in that level)
687 must be carried forward so they will later become subblocks
688 of something else. */
690 current_binding_level->blocks
691 = chainon (current_binding_level->blocks, subblocks);
693 /* Each and every BLOCK node created here in `poplevel' is important
694 (e.g. for proper debugging information) so if we created one
695 earlier, mark it as "used". */
697 TREE_USED (block) = 1;
699 /* All temporary bindings created for cleanups are popped silently. */
700 if (kind == sk_cleanup)
703 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, block);
706 /* Delete the node BLOCK from the current binding level.
707 This is used for the block inside a stmt expr ({...})
708 so that the block can be reinserted where appropriate. */
711 delete_block (tree block)
714 if (current_binding_level->blocks == block)
715 current_binding_level->blocks = TREE_CHAIN (block);
716 for (t = current_binding_level->blocks; t;)
718 if (TREE_CHAIN (t) == block)
719 TREE_CHAIN (t) = TREE_CHAIN (block);
723 TREE_CHAIN (block) = NULL_TREE;
724 /* Clear TREE_USED which is always set by poplevel.
725 The flag is set again if insert_block is called. */
726 TREE_USED (block) = 0;
729 /* Insert BLOCK at the end of the list of subblocks of the
730 current binding level. This is used when a BIND_EXPR is expanded,
731 to handle the BLOCK node inside the BIND_EXPR. */
734 insert_block (tree block)
736 TREE_USED (block) = 1;
737 current_binding_level->blocks
738 = chainon (current_binding_level->blocks, block);
741 /* Returns nonzero if T is a virtual function table. */
744 vtable_decl_p (tree t, void* data ATTRIBUTE_UNUSED )
746 return (TREE_CODE (t) == VAR_DECL && DECL_VIRTUAL_P (t));
749 /* Returns nonzero if T is a TYPE_DECL for a type with virtual
753 vtype_decl_p (tree t, void *data ATTRIBUTE_UNUSED )
755 return (TREE_CODE (t) == TYPE_DECL
756 && TREE_CODE (TREE_TYPE (t)) == RECORD_TYPE
757 && TYPE_POLYMORPHIC_P (TREE_TYPE (t)));
760 struct walk_globals_data {
766 /* Walk the vtable declarations in NAMESPACE. Whenever one is found
767 for which P returns nonzero, call F with its address. If any call
768 to F returns a nonzero value, return a nonzero value. */
771 walk_vtables_r (tree namespace, void* data)
773 struct walk_globals_data* wgd = (struct walk_globals_data *) data;
774 walk_globals_fn f = wgd->f;
776 tree decl = NAMESPACE_LEVEL (namespace)->vtables;
779 for (; decl ; decl = TREE_CHAIN (decl))
780 result |= (*f) (&decl, d);
785 /* Walk the vtable declarations. Whenever one is found for which P
786 returns nonzero, call F with its address. If any call to F
787 returns a nonzero value, return a nonzero value. */
789 walk_vtables (walk_globals_pred p, walk_globals_fn f, void *data)
791 struct walk_globals_data wgd;
796 return walk_namespaces (walk_vtables_r, &wgd);
799 /* Walk all the namespaces contained NAMESPACE, including NAMESPACE
800 itself, calling F for each. The DATA is passed to F as well. */
803 walk_namespaces_r (tree namespace, walk_namespaces_fn f, void* data)
806 tree current = NAMESPACE_LEVEL (namespace)->namespaces;
808 result |= (*f) (namespace, data);
810 for (; current; current = TREE_CHAIN (current))
811 result |= walk_namespaces_r (current, f, data);
816 /* Walk all the namespaces, calling F for each. The DATA is passed to
820 walk_namespaces (walk_namespaces_fn f, void* data)
822 return walk_namespaces_r (global_namespace, f, data);
825 /* Walk the global declarations in NAMESPACE. Whenever one is found
826 for which P returns nonzero, call F with its address. If any call
827 to F returns a nonzero value, return a nonzero value. */
830 walk_globals_r (tree namespace, void* data)
832 struct walk_globals_data* wgd = (struct walk_globals_data *) data;
833 walk_globals_pred p = wgd->p;
834 walk_globals_fn f = wgd->f;
839 t = &NAMESPACE_LEVEL (namespace)->names;
846 result |= (*f) (t, d);
848 /* If F changed *T, then *T still points at the next item to
851 t = &TREE_CHAIN (*t);
857 /* Walk the global declarations. Whenever one is found for which P
858 returns true, call F with its address. If any call to F
859 returns true, return true. */
862 walk_globals (walk_globals_pred p, walk_globals_fn f, void *data)
864 struct walk_globals_data wgd;
869 return walk_namespaces (walk_globals_r, &wgd);
872 /* Call wrapup_globals_declarations for the globals in NAMESPACE. If
873 DATA is non-NULL, this is the last time we will call
874 wrapup_global_declarations for this NAMESPACE. */
877 wrapup_globals_for_namespace (tree namespace, void* data)
879 struct cp_binding_level *level = NAMESPACE_LEVEL (namespace);
880 varray_type statics = level->static_decls;
881 tree *vec = &VARRAY_TREE (statics, 0);
882 int len = VARRAY_ACTIVE_SIZE (statics);
883 int last_time = (data != 0);
887 check_global_declarations (vec, len);
891 /* Write out any globals that need to be output. */
892 return wrapup_global_declarations (vec, len);
896 /* In C++, you don't have to write `struct S' to refer to `S'; you
897 can just use `S'. We accomplish this by creating a TYPE_DECL as
898 if the user had written `typedef struct S S'. Create and return
899 the TYPE_DECL for TYPE. */
902 create_implicit_typedef (tree name, tree type)
906 decl = build_decl (TYPE_DECL, name, type);
907 DECL_ARTIFICIAL (decl) = 1;
908 /* There are other implicit type declarations, like the one *within*
909 a class that allows you to write `S::S'. We must distinguish
911 SET_DECL_IMPLICIT_TYPEDEF_P (decl);
912 TYPE_NAME (type) = decl;
917 /* Remember a local name for name-mangling purposes. */
920 push_local_name (tree decl)
925 timevar_push (TV_NAME_LOOKUP);
927 VARRAY_TREE_INIT (local_names, 8, "local_names");
929 name = DECL_NAME (decl);
931 nelts = VARRAY_ACTIVE_SIZE (local_names);
932 for (i = 0; i < nelts; i++)
934 t = VARRAY_TREE (local_names, i);
935 if (DECL_NAME (t) == name)
937 if (!DECL_LANG_SPECIFIC (decl))
938 retrofit_lang_decl (decl);
939 DECL_LANG_SPECIFIC (decl)->decl_flags.u2sel = 1;
940 if (DECL_LANG_SPECIFIC (t))
941 DECL_DISCRIMINATOR (decl) = DECL_DISCRIMINATOR (t) + 1;
943 DECL_DISCRIMINATOR (decl) = 1;
945 VARRAY_TREE (local_names, i) = decl;
946 timevar_pop (TV_NAME_LOOKUP);
951 VARRAY_PUSH_TREE (local_names, decl);
952 timevar_pop (TV_NAME_LOOKUP);
955 /* Subroutine of duplicate_decls: return truthvalue of whether
956 or not types of these decls match.
958 For C++, we must compare the parameter list so that `int' can match
959 `int&' in a parameter position, but `int&' is not confused with
963 decls_match (tree newdecl, tree olddecl)
967 if (newdecl == olddecl)
970 if (TREE_CODE (newdecl) != TREE_CODE (olddecl))
971 /* If the two DECLs are not even the same kind of thing, we're not
972 interested in their types. */
975 if (TREE_CODE (newdecl) == FUNCTION_DECL)
977 tree f1 = TREE_TYPE (newdecl);
978 tree f2 = TREE_TYPE (olddecl);
979 tree p1 = TYPE_ARG_TYPES (f1);
980 tree p2 = TYPE_ARG_TYPES (f2);
982 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl)
983 && ! (DECL_EXTERN_C_P (newdecl)
984 && DECL_EXTERN_C_P (olddecl)))
987 if (TREE_CODE (f1) != TREE_CODE (f2))
990 if (same_type_p (TREE_TYPE (f1), TREE_TYPE (f2)))
992 if (p2 == NULL_TREE && DECL_EXTERN_C_P (olddecl)
993 && (DECL_BUILT_IN (olddecl)
994 #ifndef NO_IMPLICIT_EXTERN_C
995 || (DECL_IN_SYSTEM_HEADER (newdecl) && !DECL_CLASS_SCOPE_P (newdecl))
996 || (DECL_IN_SYSTEM_HEADER (olddecl) && !DECL_CLASS_SCOPE_P (olddecl))
1000 types_match = self_promoting_args_p (p1);
1001 if (p1 == void_list_node)
1002 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
1004 #ifndef NO_IMPLICIT_EXTERN_C
1005 else if (p1 == NULL_TREE
1006 && (DECL_EXTERN_C_P (olddecl)
1007 && DECL_IN_SYSTEM_HEADER (olddecl)
1008 && !DECL_CLASS_SCOPE_P (olddecl))
1009 && (DECL_EXTERN_C_P (newdecl)
1010 && DECL_IN_SYSTEM_HEADER (newdecl)
1011 && !DECL_CLASS_SCOPE_P (newdecl)))
1013 types_match = self_promoting_args_p (p2);
1014 TREE_TYPE (newdecl) = TREE_TYPE (olddecl);
1018 types_match = compparms (p1, p2);
1023 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1025 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl))
1026 != TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)))
1029 if (!comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1030 DECL_TEMPLATE_PARMS (olddecl)))
1033 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1034 types_match = same_type_p (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl)),
1035 TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl)));
1037 types_match = decls_match (DECL_TEMPLATE_RESULT (olddecl),
1038 DECL_TEMPLATE_RESULT (newdecl));
1042 if (TREE_TYPE (newdecl) == error_mark_node)
1043 types_match = TREE_TYPE (olddecl) == error_mark_node;
1044 else if (TREE_TYPE (olddecl) == NULL_TREE)
1045 types_match = TREE_TYPE (newdecl) == NULL_TREE;
1046 else if (TREE_TYPE (newdecl) == NULL_TREE)
1049 types_match = comptypes (TREE_TYPE (newdecl),
1050 TREE_TYPE (olddecl),
1051 COMPARE_REDECLARATION);
1057 /* If NEWDECL is `static' and an `extern' was seen previously,
1058 warn about it. OLDDECL is the previous declaration.
1060 Note that this does not apply to the C++ case of declaring
1061 a variable `extern const' and then later `const'.
1063 Don't complain about built-in functions, since they are beyond
1064 the user's control. */
1067 warn_extern_redeclared_static (tree newdecl, tree olddecl)
1071 if (TREE_CODE (newdecl) == TYPE_DECL
1072 || TREE_CODE (newdecl) == TEMPLATE_DECL
1073 || TREE_CODE (newdecl) == CONST_DECL
1074 || TREE_CODE (newdecl) == NAMESPACE_DECL)
1077 /* Don't get confused by static member functions; that's a different
1079 if (TREE_CODE (newdecl) == FUNCTION_DECL
1080 && DECL_STATIC_FUNCTION_P (newdecl))
1083 /* If the old declaration was `static', or the new one isn't, then
1084 then everything is OK. */
1085 if (DECL_THIS_STATIC (olddecl) || !DECL_THIS_STATIC (newdecl))
1088 /* It's OK to declare a builtin function as `static'. */
1089 if (TREE_CODE (olddecl) == FUNCTION_DECL
1090 && DECL_ARTIFICIAL (olddecl))
1093 name = DECL_ASSEMBLER_NAME (newdecl);
1094 pedwarn ("`%D' was declared `extern' and later `static'", newdecl);
1095 cp_pedwarn_at ("previous declaration of `%D'", olddecl);
1098 /* If NEWDECL is a redeclaration of OLDDECL, merge the declarations.
1099 If the redeclaration is invalid, a diagnostic is issued, and the
1100 error_mark_node is returned. Otherwise, OLDDECL is returned.
1102 If NEWDECL is not a redeclaration of OLDDECL, NULL_TREE is
1106 duplicate_decls (tree newdecl, tree olddecl)
1108 unsigned olddecl_uid = DECL_UID (olddecl);
1109 int olddecl_friend = 0, types_match = 0;
1110 int new_defines_function = 0;
1112 if (newdecl == olddecl)
1115 types_match = decls_match (newdecl, olddecl);
1117 /* If either the type of the new decl or the type of the old decl is an
1118 error_mark_node, then that implies that we have already issued an
1119 error (earlier) for some bogus type specification, and in that case,
1120 it is rather pointless to harass the user with yet more error message
1121 about the same declaration, so just pretend the types match here. */
1122 if (TREE_TYPE (newdecl) == error_mark_node
1123 || TREE_TYPE (olddecl) == error_mark_node)
1126 if (DECL_P (olddecl)
1127 && TREE_CODE (newdecl) == FUNCTION_DECL
1128 && TREE_CODE (olddecl) == FUNCTION_DECL
1129 && (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl)))
1131 if (DECL_DECLARED_INLINE_P (newdecl)
1132 && DECL_UNINLINABLE (newdecl)
1133 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1134 /* Already warned elsewhere. */;
1135 else if (DECL_DECLARED_INLINE_P (olddecl)
1136 && DECL_UNINLINABLE (olddecl)
1137 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1138 /* Already warned. */;
1139 else if (DECL_DECLARED_INLINE_P (newdecl)
1140 && DECL_UNINLINABLE (olddecl)
1141 && lookup_attribute ("noinline", DECL_ATTRIBUTES (olddecl)))
1143 warning ("%Jfunction '%D' redeclared as inline", newdecl, newdecl);
1144 warning ("%Jprevious declaration of '%D' with attribute noinline",
1147 else if (DECL_DECLARED_INLINE_P (olddecl)
1148 && DECL_UNINLINABLE (newdecl)
1149 && lookup_attribute ("noinline", DECL_ATTRIBUTES (newdecl)))
1151 warning ("%Jfunction '%D' redeclared with attribute noinline",
1153 warning ("%Jprevious declaration of '%D' was inline",
1158 /* Check for redeclaration and other discrepancies. */
1159 if (TREE_CODE (olddecl) == FUNCTION_DECL
1160 && DECL_ARTIFICIAL (olddecl))
1162 if (TREE_CODE (newdecl) != FUNCTION_DECL)
1164 /* Avoid warnings redeclaring anticipated built-ins. */
1165 if (DECL_ANTICIPATED (olddecl))
1168 /* If you declare a built-in or predefined function name as static,
1169 the old definition is overridden, but optionally warn this was a
1170 bad choice of name. */
1171 if (! TREE_PUBLIC (newdecl))
1174 warning ("shadowing %s function `%#D'",
1175 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1177 /* Discard the old built-in function. */
1180 /* If the built-in is not ansi, then programs can override
1181 it even globally without an error. */
1182 else if (! DECL_BUILT_IN (olddecl))
1183 warning ("library function `%#D' redeclared as non-function `%#D'",
1187 error ("declaration of `%#D'", newdecl);
1188 error ("conflicts with built-in declaration `%#D'",
1193 else if (!types_match)
1195 /* Avoid warnings redeclaring anticipated built-ins. */
1196 if (DECL_ANTICIPATED (olddecl))
1198 /* Deal with fileptr_type_node. FILE type is not known
1199 at the time we create the builtins. */
1202 for (t1 = TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1203 t2 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1205 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2))
1208 else if (TREE_VALUE (t2) == fileptr_type_node)
1210 tree t = TREE_VALUE (t1);
1212 if (TREE_CODE (t) == POINTER_TYPE
1213 && TYPE_NAME (TREE_TYPE (t))
1214 && DECL_NAME (TYPE_NAME (TREE_TYPE (t)))
1215 == get_identifier ("FILE")
1216 && compparms (TREE_CHAIN (t1), TREE_CHAIN (t2)))
1218 tree oldargs = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1220 TYPE_ARG_TYPES (TREE_TYPE (olddecl))
1221 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1222 types_match = decls_match (newdecl, olddecl);
1224 return duplicate_decls (newdecl, olddecl);
1225 TYPE_ARG_TYPES (TREE_TYPE (olddecl)) = oldargs;
1228 else if (! same_type_p (TREE_VALUE (t1), TREE_VALUE (t2)))
1231 else if ((DECL_EXTERN_C_P (newdecl)
1232 && DECL_EXTERN_C_P (olddecl))
1233 || compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1234 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1236 /* A near match; override the builtin. */
1238 if (TREE_PUBLIC (newdecl))
1240 warning ("new declaration `%#D'", newdecl);
1241 warning ("ambiguates built-in declaration `%#D'",
1244 else if (warn_shadow)
1245 warning ("shadowing %s function `%#D'",
1246 DECL_BUILT_IN (olddecl) ? "built-in" : "library",
1250 /* Discard the old built-in function. */
1253 /* Replace the old RTL to avoid problems with inlining. */
1254 COPY_DECL_RTL (newdecl, olddecl);
1256 /* Even if the types match, prefer the new declarations type
1257 for anticipated built-ins, for exception lists, etc... */
1258 else if (DECL_ANTICIPATED (olddecl))
1260 tree type = TREE_TYPE (newdecl);
1261 tree attribs = (*targetm.merge_type_attributes)
1262 (TREE_TYPE (olddecl), type);
1264 type = cp_build_type_attribute_variant (type, attribs);
1265 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = type;
1268 /* Whether or not the builtin can throw exceptions has no
1269 bearing on this declarator. */
1270 TREE_NOTHROW (olddecl) = 0;
1272 if (DECL_THIS_STATIC (newdecl) && !DECL_THIS_STATIC (olddecl))
1274 /* If a builtin function is redeclared as `static', merge
1275 the declarations, but make the original one static. */
1276 DECL_THIS_STATIC (olddecl) = 1;
1277 TREE_PUBLIC (olddecl) = 0;
1279 /* Make the old declaration consistent with the new one so
1280 that all remnants of the builtin-ness of this function
1281 will be banished. */
1282 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1283 COPY_DECL_RTL (newdecl, olddecl);
1286 else if (TREE_CODE (olddecl) != TREE_CODE (newdecl))
1288 if ((TREE_CODE (olddecl) == TYPE_DECL && DECL_ARTIFICIAL (olddecl)
1289 && TREE_CODE (newdecl) != TYPE_DECL
1290 && ! (TREE_CODE (newdecl) == TEMPLATE_DECL
1291 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL))
1292 || (TREE_CODE (newdecl) == TYPE_DECL && DECL_ARTIFICIAL (newdecl)
1293 && TREE_CODE (olddecl) != TYPE_DECL
1294 && ! (TREE_CODE (olddecl) == TEMPLATE_DECL
1295 && (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl))
1298 /* We do nothing special here, because C++ does such nasty
1299 things with TYPE_DECLs. Instead, just let the TYPE_DECL
1300 get shadowed, and know that if we need to find a TYPE_DECL
1301 for a given name, we can look in the IDENTIFIER_TYPE_VALUE
1302 slot of the identifier. */
1306 if ((TREE_CODE (newdecl) == FUNCTION_DECL
1307 && DECL_FUNCTION_TEMPLATE_P (olddecl))
1308 || (TREE_CODE (olddecl) == FUNCTION_DECL
1309 && DECL_FUNCTION_TEMPLATE_P (newdecl)))
1312 error ("`%#D' redeclared as different kind of symbol", newdecl);
1313 if (TREE_CODE (olddecl) == TREE_LIST)
1314 olddecl = TREE_VALUE (olddecl);
1315 cp_error_at ("previous declaration of `%#D'", olddecl);
1317 return error_mark_node;
1319 else if (!types_match)
1321 if (CP_DECL_CONTEXT (newdecl) != CP_DECL_CONTEXT (olddecl))
1322 /* These are certainly not duplicate declarations; they're
1323 from different scopes. */
1326 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1328 /* The name of a class template may not be declared to refer to
1329 any other template, class, function, object, namespace, value,
1330 or type in the same scope. */
1331 if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == TYPE_DECL
1332 || TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1334 error ("declaration of template `%#D'", newdecl);
1335 cp_error_at ("conflicts with previous declaration `%#D'",
1338 else if (TREE_CODE (DECL_TEMPLATE_RESULT (olddecl)) == FUNCTION_DECL
1339 && TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == FUNCTION_DECL
1340 && compparms (TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl))),
1341 TYPE_ARG_TYPES (TREE_TYPE (DECL_TEMPLATE_RESULT (newdecl))))
1342 && comp_template_parms (DECL_TEMPLATE_PARMS (newdecl),
1343 DECL_TEMPLATE_PARMS (olddecl))
1344 /* Template functions can be disambiguated by
1346 && same_type_p (TREE_TYPE (TREE_TYPE (newdecl)),
1347 TREE_TYPE (TREE_TYPE (olddecl))))
1349 error ("new declaration `%#D'", newdecl);
1350 cp_error_at ("ambiguates old declaration `%#D'", olddecl);
1354 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1356 if (DECL_EXTERN_C_P (newdecl) && DECL_EXTERN_C_P (olddecl))
1358 error ("declaration of C function `%#D' conflicts with",
1360 cp_error_at ("previous declaration `%#D' here", olddecl);
1362 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (newdecl)),
1363 TYPE_ARG_TYPES (TREE_TYPE (olddecl))))
1365 error ("new declaration `%#D'", newdecl);
1366 cp_error_at ("ambiguates old declaration `%#D'", olddecl);
1373 error ("conflicting declaration '%#D'", newdecl);
1374 cp_error_at ("'%D' has a previous declaration as `%#D'",
1379 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1380 && ((DECL_TEMPLATE_SPECIALIZATION (olddecl)
1381 && (!DECL_TEMPLATE_INFO (newdecl)
1382 || (DECL_TI_TEMPLATE (newdecl)
1383 != DECL_TI_TEMPLATE (olddecl))))
1384 || (DECL_TEMPLATE_SPECIALIZATION (newdecl)
1385 && (!DECL_TEMPLATE_INFO (olddecl)
1386 || (DECL_TI_TEMPLATE (olddecl)
1387 != DECL_TI_TEMPLATE (newdecl))))))
1388 /* It's OK to have a template specialization and a non-template
1389 with the same type, or to have specializations of two
1390 different templates with the same type. Note that if one is a
1391 specialization, and the other is an instantiation of the same
1392 template, that we do not exit at this point. That situation
1393 can occur if we instantiate a template class, and then
1394 specialize one of its methods. This situation is valid, but
1395 the declarations must be merged in the usual way. */
1397 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1398 && ((DECL_TEMPLATE_INSTANTIATION (olddecl)
1399 && !DECL_USE_TEMPLATE (newdecl))
1400 || (DECL_TEMPLATE_INSTANTIATION (newdecl)
1401 && !DECL_USE_TEMPLATE (olddecl))))
1402 /* One of the declarations is a template instantiation, and the
1403 other is not a template at all. That's OK. */
1405 else if (TREE_CODE (newdecl) == NAMESPACE_DECL
1406 && DECL_NAMESPACE_ALIAS (newdecl)
1407 && DECL_NAMESPACE_ALIAS (newdecl) == DECL_NAMESPACE_ALIAS (olddecl))
1408 /* In [namespace.alias] we have:
1410 In a declarative region, a namespace-alias-definition can be
1411 used to redefine a namespace-alias declared in that declarative
1412 region to refer only to the namespace to which it already
1415 Therefore, if we encounter a second alias directive for the same
1416 alias, we can just ignore the second directive. */
1420 const char *errmsg = redeclaration_error_message (newdecl, olddecl);
1423 error (errmsg, newdecl);
1424 if (DECL_NAME (olddecl) != NULL_TREE)
1425 cp_error_at ((DECL_INITIAL (olddecl)
1426 && namespace_bindings_p ())
1427 ? "`%#D' previously defined here"
1428 : "`%#D' previously declared here", olddecl);
1429 return error_mark_node;
1431 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1432 && DECL_INITIAL (olddecl) != NULL_TREE
1433 && TYPE_ARG_TYPES (TREE_TYPE (olddecl)) == NULL_TREE
1434 && TYPE_ARG_TYPES (TREE_TYPE (newdecl)) != NULL_TREE)
1436 /* Prototype decl follows defn w/o prototype. */
1437 cp_warning_at ("prototype for `%#D'", newdecl);
1438 warning ("%Jfollows non-prototype definition here", olddecl);
1440 else if (TREE_CODE (olddecl) == FUNCTION_DECL
1441 && DECL_LANGUAGE (newdecl) != DECL_LANGUAGE (olddecl))
1443 /* extern "C" int foo ();
1444 int foo () { bar (); }
1446 if (current_lang_depth () == 0)
1447 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1450 cp_error_at ("previous declaration of `%#D' with %L linkage",
1451 olddecl, DECL_LANGUAGE (olddecl));
1452 error ("conflicts with new declaration with %L linkage",
1453 DECL_LANGUAGE (newdecl));
1457 if (DECL_LANG_SPECIFIC (olddecl) && DECL_USE_TEMPLATE (olddecl))
1459 else if (TREE_CODE (olddecl) == FUNCTION_DECL)
1461 tree t1 = TYPE_ARG_TYPES (TREE_TYPE (olddecl));
1462 tree t2 = TYPE_ARG_TYPES (TREE_TYPE (newdecl));
1465 if (TREE_CODE (TREE_TYPE (newdecl)) == METHOD_TYPE)
1466 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2);
1468 for (; t1 && t1 != void_list_node;
1469 t1 = TREE_CHAIN (t1), t2 = TREE_CHAIN (t2), i++)
1470 if (TREE_PURPOSE (t1) && TREE_PURPOSE (t2))
1472 if (1 == simple_cst_equal (TREE_PURPOSE (t1),
1475 pedwarn ("default argument given for parameter %d of `%#D'",
1477 cp_pedwarn_at ("after previous specification in `%#D'",
1482 error ("default argument given for parameter %d of `%#D'",
1484 cp_error_at ("after previous specification in `%#D'",
1489 if (DECL_DECLARED_INLINE_P (newdecl)
1490 && ! DECL_DECLARED_INLINE_P (olddecl)
1491 && TREE_ADDRESSABLE (olddecl) && warn_inline)
1493 warning ("`%#D' was used before it was declared inline", newdecl);
1494 warning ("%Jprevious non-inline declaration here", olddecl);
1499 /* Do not merge an implicit typedef with an explicit one. In:
1503 typedef class A A __attribute__ ((foo));
1505 the attribute should apply only to the typedef. */
1506 if (TREE_CODE (olddecl) == TYPE_DECL
1507 && (DECL_IMPLICIT_TYPEDEF_P (olddecl)
1508 || DECL_IMPLICIT_TYPEDEF_P (newdecl)))
1511 /* If new decl is `static' and an `extern' was seen previously,
1513 warn_extern_redeclared_static (newdecl, olddecl);
1515 /* We have committed to returning 1 at this point. */
1516 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1518 /* Now that functions must hold information normally held
1519 by field decls, there is extra work to do so that
1520 declaration information does not get destroyed during
1522 if (DECL_VINDEX (olddecl))
1523 DECL_VINDEX (newdecl) = DECL_VINDEX (olddecl);
1524 if (DECL_CONTEXT (olddecl))
1525 DECL_CONTEXT (newdecl) = DECL_CONTEXT (olddecl);
1526 DECL_STATIC_CONSTRUCTOR (newdecl) |= DECL_STATIC_CONSTRUCTOR (olddecl);
1527 DECL_STATIC_DESTRUCTOR (newdecl) |= DECL_STATIC_DESTRUCTOR (olddecl);
1528 DECL_PURE_VIRTUAL_P (newdecl) |= DECL_PURE_VIRTUAL_P (olddecl);
1529 DECL_VIRTUAL_P (newdecl) |= DECL_VIRTUAL_P (olddecl);
1530 DECL_NEEDS_FINAL_OVERRIDER_P (newdecl) |= DECL_NEEDS_FINAL_OVERRIDER_P (olddecl);
1531 DECL_THIS_STATIC (newdecl) |= DECL_THIS_STATIC (olddecl);
1532 if (DECL_OVERLOADED_OPERATOR_P (olddecl) != ERROR_MARK)
1533 SET_OVERLOADED_OPERATOR_CODE
1534 (newdecl, DECL_OVERLOADED_OPERATOR_P (olddecl));
1535 new_defines_function = DECL_INITIAL (newdecl) != NULL_TREE;
1537 /* Optionally warn about more than one declaration for the same
1538 name, but don't warn about a function declaration followed by a
1540 if (warn_redundant_decls && ! DECL_ARTIFICIAL (olddecl)
1541 && !(new_defines_function && DECL_INITIAL (olddecl) == NULL_TREE)
1542 /* Don't warn about extern decl followed by definition. */
1543 && !(DECL_EXTERNAL (olddecl) && ! DECL_EXTERNAL (newdecl))
1544 /* Don't warn about friends, let add_friend take care of it. */
1545 && ! (DECL_FRIEND_P (newdecl) || DECL_FRIEND_P (olddecl)))
1547 warning ("redundant redeclaration of `%D' in same scope", newdecl);
1548 cp_warning_at ("previous declaration of `%D'", olddecl);
1552 /* Deal with C++: must preserve virtual function table size. */
1553 if (TREE_CODE (olddecl) == TYPE_DECL)
1555 tree newtype = TREE_TYPE (newdecl);
1556 tree oldtype = TREE_TYPE (olddecl);
1558 if (newtype != error_mark_node && oldtype != error_mark_node
1559 && TYPE_LANG_SPECIFIC (newtype) && TYPE_LANG_SPECIFIC (oldtype))
1560 CLASSTYPE_FRIEND_CLASSES (newtype)
1561 = CLASSTYPE_FRIEND_CLASSES (oldtype);
1563 DECL_ORIGINAL_TYPE (newdecl) = DECL_ORIGINAL_TYPE (olddecl);
1566 /* Copy all the DECL_... slots specified in the new decl
1567 except for any that we copy here from the old type. */
1568 DECL_ATTRIBUTES (newdecl)
1569 = (*targetm.merge_decl_attributes) (olddecl, newdecl);
1571 if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1573 TREE_TYPE (olddecl) = TREE_TYPE (DECL_TEMPLATE_RESULT (olddecl));
1574 DECL_TEMPLATE_SPECIALIZATIONS (olddecl)
1575 = chainon (DECL_TEMPLATE_SPECIALIZATIONS (olddecl),
1576 DECL_TEMPLATE_SPECIALIZATIONS (newdecl));
1578 /* If the new declaration is a definition, update the file and
1579 line information on the declaration. */
1580 if (DECL_INITIAL (DECL_TEMPLATE_RESULT (olddecl)) == NULL_TREE
1581 && DECL_INITIAL (DECL_TEMPLATE_RESULT (newdecl)) != NULL_TREE)
1583 DECL_SOURCE_LOCATION (olddecl)
1584 = DECL_SOURCE_LOCATION (DECL_TEMPLATE_RESULT (olddecl))
1585 = DECL_SOURCE_LOCATION (newdecl);
1586 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1587 DECL_ARGUMENTS (DECL_TEMPLATE_RESULT (olddecl))
1588 = DECL_ARGUMENTS (DECL_TEMPLATE_RESULT (newdecl));
1591 if (DECL_FUNCTION_TEMPLATE_P (newdecl))
1593 DECL_INLINE (DECL_TEMPLATE_RESULT (olddecl))
1594 |= DECL_INLINE (DECL_TEMPLATE_RESULT (newdecl));
1595 DECL_DECLARED_INLINE_P (DECL_TEMPLATE_RESULT (olddecl))
1596 |= DECL_DECLARED_INLINE_P (DECL_TEMPLATE_RESULT (newdecl));
1604 /* Automatically handles default parameters. */
1605 tree oldtype = TREE_TYPE (olddecl);
1608 /* Merge the data types specified in the two decls. */
1609 newtype = merge_types (TREE_TYPE (newdecl), TREE_TYPE (olddecl));
1611 /* If merge_types produces a non-typedef type, just use the old type. */
1612 if (TREE_CODE (newdecl) == TYPE_DECL
1613 && newtype == DECL_ORIGINAL_TYPE (newdecl))
1616 if (TREE_CODE (newdecl) == VAR_DECL)
1618 DECL_THIS_EXTERN (newdecl) |= DECL_THIS_EXTERN (olddecl);
1619 DECL_INITIALIZED_P (newdecl) |= DECL_INITIALIZED_P (olddecl);
1620 DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (newdecl)
1621 |= DECL_INITIALIZED_BY_CONSTANT_EXPRESSION_P (olddecl);
1624 /* Do this after calling `merge_types' so that default
1625 parameters don't confuse us. */
1626 else if (TREE_CODE (newdecl) == FUNCTION_DECL
1627 && (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl))
1628 != TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl))))
1630 TREE_TYPE (newdecl) = build_exception_variant (newtype,
1631 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl)));
1632 TREE_TYPE (olddecl) = build_exception_variant (newtype,
1633 TYPE_RAISES_EXCEPTIONS (oldtype));
1635 if ((pedantic || ! DECL_IN_SYSTEM_HEADER (olddecl))
1636 && ! DECL_IS_BUILTIN (olddecl)
1638 && !comp_except_specs (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (newdecl)),
1639 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (olddecl)), 1))
1641 error ("declaration of `%F' throws different exceptions",
1643 cp_error_at ("than previous declaration `%F'", olddecl);
1646 TREE_TYPE (newdecl) = TREE_TYPE (olddecl) = newtype;
1648 /* Lay the type out, unless already done. */
1649 if (! same_type_p (newtype, oldtype)
1650 && TREE_TYPE (newdecl) != error_mark_node
1651 && !(processing_template_decl && uses_template_parms (newdecl)))
1652 layout_type (TREE_TYPE (newdecl));
1654 if ((TREE_CODE (newdecl) == VAR_DECL
1655 || TREE_CODE (newdecl) == PARM_DECL
1656 || TREE_CODE (newdecl) == RESULT_DECL
1657 || TREE_CODE (newdecl) == FIELD_DECL
1658 || TREE_CODE (newdecl) == TYPE_DECL)
1659 && !(processing_template_decl && uses_template_parms (newdecl)))
1660 layout_decl (newdecl, 0);
1662 /* Merge the type qualifiers. */
1663 if (TREE_READONLY (newdecl))
1664 TREE_READONLY (olddecl) = 1;
1665 if (TREE_THIS_VOLATILE (newdecl))
1666 TREE_THIS_VOLATILE (olddecl) = 1;
1668 /* Merge the initialization information. */
1669 if (DECL_INITIAL (newdecl) == NULL_TREE
1670 && DECL_INITIAL (olddecl) != NULL_TREE)
1672 DECL_INITIAL (newdecl) = DECL_INITIAL (olddecl);
1673 DECL_SOURCE_LOCATION (newdecl) = DECL_SOURCE_LOCATION (olddecl);
1674 if (CAN_HAVE_FULL_LANG_DECL_P (newdecl)
1675 && DECL_LANG_SPECIFIC (newdecl)
1676 && DECL_LANG_SPECIFIC (olddecl))
1678 DECL_SAVED_TREE (newdecl) = DECL_SAVED_TREE (olddecl);
1679 DECL_STRUCT_FUNCTION (newdecl) = DECL_STRUCT_FUNCTION (olddecl);
1683 /* Merge the section attribute.
1684 We want to issue an error if the sections conflict but that must be
1685 done later in decl_attributes since we are called before attributes
1687 if (DECL_SECTION_NAME (newdecl) == NULL_TREE)
1688 DECL_SECTION_NAME (newdecl) = DECL_SECTION_NAME (olddecl);
1690 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1692 DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (newdecl)
1693 |= DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (olddecl);
1694 DECL_NO_LIMIT_STACK (newdecl) |= DECL_NO_LIMIT_STACK (olddecl);
1695 TREE_THIS_VOLATILE (newdecl) |= TREE_THIS_VOLATILE (olddecl);
1696 TREE_READONLY (newdecl) |= TREE_READONLY (olddecl);
1697 TREE_NOTHROW (newdecl) |= TREE_NOTHROW (olddecl);
1698 DECL_IS_MALLOC (newdecl) |= DECL_IS_MALLOC (olddecl);
1699 DECL_IS_PURE (newdecl) |= DECL_IS_PURE (olddecl);
1700 /* Keep the old RTL. */
1701 COPY_DECL_RTL (olddecl, newdecl);
1703 else if (TREE_CODE (newdecl) == VAR_DECL
1704 && (DECL_SIZE (olddecl) || !DECL_SIZE (newdecl)))
1706 /* Keep the old RTL. We cannot keep the old RTL if the old
1707 declaration was for an incomplete object and the new
1708 declaration is not since many attributes of the RTL will
1710 COPY_DECL_RTL (olddecl, newdecl);
1713 /* If cannot merge, then use the new type and qualifiers,
1714 and don't preserve the old rtl. */
1717 /* Clean out any memory we had of the old declaration. */
1718 tree oldstatic = value_member (olddecl, static_aggregates);
1720 TREE_VALUE (oldstatic) = error_mark_node;
1722 TREE_TYPE (olddecl) = TREE_TYPE (newdecl);
1723 TREE_READONLY (olddecl) = TREE_READONLY (newdecl);
1724 TREE_THIS_VOLATILE (olddecl) = TREE_THIS_VOLATILE (newdecl);
1725 TREE_SIDE_EFFECTS (olddecl) = TREE_SIDE_EFFECTS (newdecl);
1728 /* Merge the storage class information. */
1729 merge_weak (newdecl, olddecl);
1731 DECL_ONE_ONLY (newdecl) |= DECL_ONE_ONLY (olddecl);
1732 DECL_DEFER_OUTPUT (newdecl) |= DECL_DEFER_OUTPUT (olddecl);
1733 TREE_PUBLIC (newdecl) = TREE_PUBLIC (olddecl);
1734 TREE_STATIC (olddecl) = TREE_STATIC (newdecl) |= TREE_STATIC (olddecl);
1735 if (! DECL_EXTERNAL (olddecl))
1736 DECL_EXTERNAL (newdecl) = 0;
1738 if (DECL_LANG_SPECIFIC (newdecl) && DECL_LANG_SPECIFIC (olddecl))
1740 DECL_INTERFACE_KNOWN (newdecl) |= DECL_INTERFACE_KNOWN (olddecl);
1741 DECL_NOT_REALLY_EXTERN (newdecl) |= DECL_NOT_REALLY_EXTERN (olddecl);
1742 DECL_COMDAT (newdecl) |= DECL_COMDAT (olddecl);
1743 DECL_TEMPLATE_INSTANTIATED (newdecl)
1744 |= DECL_TEMPLATE_INSTANTIATED (olddecl);
1745 /* Don't really know how much of the language-specific
1746 values we should copy from old to new. */
1747 DECL_IN_AGGR_P (newdecl) = DECL_IN_AGGR_P (olddecl);
1748 DECL_LANG_SPECIFIC (newdecl)->decl_flags.u2 =
1749 DECL_LANG_SPECIFIC (olddecl)->decl_flags.u2;
1750 DECL_NONCONVERTING_P (newdecl) = DECL_NONCONVERTING_P (olddecl);
1751 DECL_TEMPLATE_INFO (newdecl) = DECL_TEMPLATE_INFO (olddecl);
1752 DECL_INITIALIZED_IN_CLASS_P (newdecl)
1753 |= DECL_INITIALIZED_IN_CLASS_P (olddecl);
1754 olddecl_friend = DECL_FRIEND_P (olddecl);
1756 /* Only functions have DECL_BEFRIENDING_CLASSES. */
1757 if (TREE_CODE (newdecl) == FUNCTION_DECL
1758 || DECL_FUNCTION_TEMPLATE_P (newdecl))
1760 DECL_BEFRIENDING_CLASSES (newdecl)
1761 = chainon (DECL_BEFRIENDING_CLASSES (newdecl),
1762 DECL_BEFRIENDING_CLASSES (olddecl));
1763 /* DECL_THUNKS is only valid for virtual functions,
1764 otherwise it is a DECL_FRIEND_CONTEXT. */
1765 if (DECL_VIRTUAL_P (newdecl))
1766 DECL_THUNKS (newdecl) = DECL_THUNKS (olddecl);
1770 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1772 if (DECL_TEMPLATE_INSTANTIATION (olddecl)
1773 && !DECL_TEMPLATE_INSTANTIATION (newdecl))
1775 /* If newdecl is not a specialization, then it is not a
1776 template-related function at all. And that means that we
1777 should have exited above, returning 0. */
1778 my_friendly_assert (DECL_TEMPLATE_SPECIALIZATION (newdecl),
1781 if (TREE_USED (olddecl))
1782 /* From [temp.expl.spec]:
1784 If a template, a member template or the member of a class
1785 template is explicitly specialized then that
1786 specialization shall be declared before the first use of
1787 that specialization that would cause an implicit
1788 instantiation to take place, in every translation unit in
1789 which such a use occurs. */
1790 error ("explicit specialization of %D after first use",
1793 SET_DECL_TEMPLATE_SPECIALIZATION (olddecl);
1795 /* [temp.expl.spec/14] We don't inline explicit specialization
1796 just because the primary template says so. */
1800 if (DECL_PENDING_INLINE_INFO (newdecl) == 0)
1801 DECL_PENDING_INLINE_INFO (newdecl) = DECL_PENDING_INLINE_INFO (olddecl);
1803 DECL_DECLARED_INLINE_P (newdecl) |= DECL_DECLARED_INLINE_P (olddecl);
1805 /* If either decl says `inline', this fn is inline, unless
1806 its definition was passed already. */
1807 if (DECL_INLINE (newdecl) && DECL_INITIAL (olddecl) == NULL_TREE)
1808 DECL_INLINE (olddecl) = 1;
1809 DECL_INLINE (newdecl) = DECL_INLINE (olddecl);
1811 DECL_UNINLINABLE (newdecl) = DECL_UNINLINABLE (olddecl)
1812 = (DECL_UNINLINABLE (newdecl) || DECL_UNINLINABLE (olddecl));
1815 /* Preserve abstractness on cloned [cd]tors. */
1816 DECL_ABSTRACT (newdecl) = DECL_ABSTRACT (olddecl);
1820 SET_DECL_LANGUAGE (olddecl, DECL_LANGUAGE (newdecl));
1821 COPY_DECL_ASSEMBLER_NAME (newdecl, olddecl);
1822 COPY_DECL_RTL (newdecl, olddecl);
1824 if (! types_match || new_defines_function)
1826 /* These need to be copied so that the names are available.
1827 Note that if the types do match, we'll preserve inline
1828 info and other bits, but if not, we won't. */
1829 DECL_ARGUMENTS (olddecl) = DECL_ARGUMENTS (newdecl);
1830 DECL_RESULT (olddecl) = DECL_RESULT (newdecl);
1832 if (new_defines_function)
1833 /* If defining a function declared with other language
1834 linkage, use the previously declared language linkage. */
1835 SET_DECL_LANGUAGE (newdecl, DECL_LANGUAGE (olddecl));
1836 else if (types_match)
1838 /* If redeclaring a builtin function, and not a definition,
1839 it stays built in. */
1840 if (DECL_BUILT_IN (olddecl))
1842 DECL_BUILT_IN_CLASS (newdecl) = DECL_BUILT_IN_CLASS (olddecl);
1843 DECL_FUNCTION_CODE (newdecl) = DECL_FUNCTION_CODE (olddecl);
1844 /* If we're keeping the built-in definition, keep the rtl,
1845 regardless of declaration matches. */
1846 COPY_DECL_RTL (olddecl, newdecl);
1849 DECL_RESULT (newdecl) = DECL_RESULT (olddecl);
1850 /* Don't clear out the arguments if we're redefining a function. */
1851 if (DECL_ARGUMENTS (olddecl))
1852 DECL_ARGUMENTS (newdecl) = DECL_ARGUMENTS (olddecl);
1855 else if (TREE_CODE (newdecl) == NAMESPACE_DECL)
1856 NAMESPACE_LEVEL (newdecl) = NAMESPACE_LEVEL (olddecl);
1858 /* Now preserve various other info from the definition. */
1859 TREE_ADDRESSABLE (newdecl) = TREE_ADDRESSABLE (olddecl);
1860 TREE_ASM_WRITTEN (newdecl) = TREE_ASM_WRITTEN (olddecl);
1861 DECL_COMMON (newdecl) = DECL_COMMON (olddecl);
1862 COPY_DECL_ASSEMBLER_NAME (olddecl, newdecl);
1864 /* If either declaration has a nondefault visibility, use it. */
1865 if (DECL_VISIBILITY (olddecl) != VISIBILITY_DEFAULT)
1867 if (DECL_VISIBILITY (newdecl) != VISIBILITY_DEFAULT
1868 && DECL_VISIBILITY (newdecl) != DECL_VISIBILITY (olddecl))
1870 warning ("%J'%D': visibility attribute ignored because it",
1872 warning ("%Jconflicts with previous declaration here", olddecl);
1874 DECL_VISIBILITY (newdecl) = DECL_VISIBILITY (olddecl);
1877 if (TREE_CODE (newdecl) == FUNCTION_DECL)
1881 function_size = sizeof (struct tree_decl);
1883 memcpy ((char *) olddecl + sizeof (struct tree_common),
1884 (char *) newdecl + sizeof (struct tree_common),
1885 function_size - sizeof (struct tree_common));
1887 if (DECL_TEMPLATE_INSTANTIATION (newdecl))
1888 /* If newdecl is a template instantiation, it is possible that
1889 the following sequence of events has occurred:
1891 o A friend function was declared in a class template. The
1892 class template was instantiated.
1894 o The instantiation of the friend declaration was
1895 recorded on the instantiation list, and is newdecl.
1897 o Later, however, instantiate_class_template called pushdecl
1898 on the newdecl to perform name injection. But, pushdecl in
1899 turn called duplicate_decls when it discovered that another
1900 declaration of a global function with the same name already
1903 o Here, in duplicate_decls, we decided to clobber newdecl.
1905 If we're going to do that, we'd better make sure that
1906 olddecl, and not newdecl, is on the list of
1907 instantiations so that if we try to do the instantiation
1908 again we won't get the clobbered declaration. */
1909 reregister_specialization (newdecl,
1910 DECL_TI_TEMPLATE (newdecl),
1915 memcpy ((char *) olddecl + sizeof (struct tree_common),
1916 (char *) newdecl + sizeof (struct tree_common),
1917 sizeof (struct tree_decl) - sizeof (struct tree_common)
1918 + TREE_CODE_LENGTH (TREE_CODE (newdecl)) * sizeof (char *));
1921 DECL_UID (olddecl) = olddecl_uid;
1923 DECL_FRIEND_P (olddecl) = 1;
1925 /* NEWDECL contains the merged attribute lists.
1926 Update OLDDECL to be the same. */
1927 DECL_ATTRIBUTES (olddecl) = DECL_ATTRIBUTES (newdecl);
1929 /* If OLDDECL had its DECL_RTL instantiated, re-invoke make_decl_rtl
1930 so that encode_section_info has a chance to look at the new decl
1931 flags and attributes. */
1932 if (DECL_RTL_SET_P (olddecl)
1933 && (TREE_CODE (olddecl) == FUNCTION_DECL
1934 || (TREE_CODE (olddecl) == VAR_DECL
1935 && TREE_STATIC (olddecl))))
1936 make_decl_rtl (olddecl, NULL);
1941 /* Return zero if the declaration NEWDECL is valid
1942 when the declaration OLDDECL (assumed to be for the same name)
1943 has already been seen.
1944 Otherwise return an error message format string with a %s
1945 where the identifier should go. */
1948 redeclaration_error_message (tree newdecl, tree olddecl)
1950 if (TREE_CODE (newdecl) == TYPE_DECL)
1952 /* Because C++ can put things into name space for free,
1953 constructs like "typedef struct foo { ... } foo"
1954 would look like an erroneous redeclaration. */
1955 if (same_type_p (TREE_TYPE (newdecl), TREE_TYPE (olddecl)))
1958 return "redefinition of `%#D'";
1960 else if (TREE_CODE (newdecl) == FUNCTION_DECL)
1962 /* If this is a pure function, its olddecl will actually be
1963 the original initialization to `0' (which we force to call
1964 abort()). Don't complain about redefinition in this case. */
1965 if (DECL_LANG_SPECIFIC (olddecl) && DECL_PURE_VIRTUAL_P (olddecl))
1968 /* If both functions come from different namespaces, this is not
1969 a redeclaration - this is a conflict with a used function. */
1970 if (DECL_NAMESPACE_SCOPE_P (olddecl)
1971 && DECL_CONTEXT (olddecl) != DECL_CONTEXT (newdecl))
1972 return "`%D' conflicts with used function";
1974 /* We'll complain about linkage mismatches in
1975 warn_extern_redeclared_static. */
1977 /* Defining the same name twice is no good. */
1978 if (DECL_INITIAL (olddecl) != NULL_TREE
1979 && DECL_INITIAL (newdecl) != NULL_TREE)
1981 if (DECL_NAME (olddecl) == NULL_TREE)
1982 return "`%#D' not declared in class";
1984 return "redefinition of `%#D'";
1988 else if (TREE_CODE (newdecl) == TEMPLATE_DECL)
1992 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) == TYPE_DECL)
1994 if (COMPLETE_TYPE_P (TREE_TYPE (newdecl))
1995 && COMPLETE_TYPE_P (TREE_TYPE (olddecl)))
1996 return "redefinition of `%#D'";
2000 if (TREE_CODE (DECL_TEMPLATE_RESULT (newdecl)) != FUNCTION_DECL
2001 || (DECL_TEMPLATE_RESULT (newdecl)
2002 == DECL_TEMPLATE_RESULT (olddecl)))
2005 nt = DECL_TEMPLATE_RESULT (newdecl);
2006 if (DECL_TEMPLATE_INFO (nt))
2007 nt = DECL_TEMPLATE_RESULT (template_for_substitution (nt));
2008 ot = DECL_TEMPLATE_RESULT (olddecl);
2009 if (DECL_TEMPLATE_INFO (ot))
2010 ot = DECL_TEMPLATE_RESULT (template_for_substitution (ot));
2011 if (DECL_INITIAL (nt) && DECL_INITIAL (ot))
2012 return "redefinition of `%#D'";
2016 else if (toplevel_bindings_p () || DECL_NAMESPACE_SCOPE_P (newdecl))
2018 /* Objects declared at top level: */
2019 /* If at least one is a reference, it's ok. */
2020 if (DECL_EXTERNAL (newdecl) || DECL_EXTERNAL (olddecl))
2022 /* Reject two definitions. */
2023 return "redefinition of `%#D'";
2027 /* Objects declared with block scope: */
2028 /* Reject two definitions, and reject a definition
2029 together with an external reference. */
2030 if (!(DECL_EXTERNAL (newdecl) && DECL_EXTERNAL (olddecl)))
2031 return "redeclaration of `%#D'";
2036 /* Create a new label, named ID. */
2039 make_label_decl (tree id, int local_p)
2043 decl = build_decl (LABEL_DECL, id, void_type_node);
2045 DECL_CONTEXT (decl) = current_function_decl;
2046 DECL_MODE (decl) = VOIDmode;
2047 C_DECLARED_LABEL_FLAG (decl) = local_p;
2049 /* Say where one reference is to the label, for the sake of the
2050 error if it is not defined. */
2051 DECL_SOURCE_LOCATION (decl) = input_location;
2053 /* Record the fact that this identifier is bound to this label. */
2054 SET_IDENTIFIER_LABEL_VALUE (id, decl);
2059 /* Record this label on the list of used labels so that we can check
2060 at the end of the function to see whether or not the label was
2061 actually defined, and so we can check when the label is defined whether
2062 this use is valid. */
2065 use_label (tree decl)
2067 if (named_label_uses == NULL
2068 || named_label_uses->names_in_scope != current_binding_level->names
2069 || named_label_uses->label_decl != decl)
2071 struct named_label_use_list *new_ent;
2072 new_ent = ggc_alloc (sizeof (struct named_label_use_list));
2073 new_ent->label_decl = decl;
2074 new_ent->names_in_scope = current_binding_level->names;
2075 new_ent->binding_level = current_binding_level;
2076 new_ent->o_goto_locus = input_location;
2077 new_ent->next = named_label_uses;
2078 named_label_uses = new_ent;
2082 /* Look for a label named ID in the current function. If one cannot
2083 be found, create one. (We keep track of used, but undefined,
2084 labels, and complain about them at the end of a function.) */
2087 lookup_label (tree id)
2090 struct named_label_list *ent;
2092 timevar_push (TV_NAME_LOOKUP);
2093 /* You can't use labels at global scope. */
2094 if (current_function_decl == NULL_TREE)
2096 error ("label `%E' referenced outside of any function", id);
2097 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, NULL_TREE);
2100 /* See if we've already got this label. */
2101 decl = IDENTIFIER_LABEL_VALUE (id);
2102 if (decl != NULL_TREE && DECL_CONTEXT (decl) == current_function_decl)
2103 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2105 /* Record this label on the list of labels used in this function.
2106 We do this before calling make_label_decl so that we get the
2107 IDENTIFIER_LABEL_VALUE before the new label is declared. */
2108 ent = ggc_alloc_cleared (sizeof (struct named_label_list));
2109 ent->old_value = IDENTIFIER_LABEL_VALUE (id);
2110 ent->next = named_labels;
2113 /* We need a new label. */
2114 decl = make_label_decl (id, /*local_p=*/0);
2116 /* Now fill in the information we didn't have before. */
2117 ent->label_decl = decl;
2119 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
2122 /* Declare a local label named ID. */
2125 declare_local_label (tree id)
2129 /* Add a new entry to the SHADOWED_LABELS list so that when we leave
2130 this scope we can restore the old value of
2131 IDENTIFIER_TYPE_VALUE. */
2132 current_binding_level->shadowed_labels
2133 = tree_cons (IDENTIFIER_LABEL_VALUE (id), NULL_TREE,
2134 current_binding_level->shadowed_labels);
2135 /* Look for the label. */
2136 decl = make_label_decl (id, /*local_p=*/1);
2137 /* Now fill in the information we didn't have before. */
2138 TREE_VALUE (current_binding_level->shadowed_labels) = decl;
2143 /* Returns nonzero if it is ill-formed to jump past the declaration of
2144 DECL. Returns 2 if it's also a real problem. */
2147 decl_jump_unsafe (tree decl)
2149 if (TREE_CODE (decl) != VAR_DECL || TREE_STATIC (decl))
2152 if (DECL_INITIAL (decl) == NULL_TREE
2153 && pod_type_p (TREE_TYPE (decl)))
2156 /* This is really only important if we're crossing an initialization.
2157 The POD stuff is just pedantry; why should it matter if the class
2158 contains a field of pointer to member type? */
2159 if (DECL_INITIAL (decl)
2160 || (TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))))
2165 /* Check that a single previously seen jump to a newly defined label
2166 is OK. DECL is the LABEL_DECL or 0; LEVEL is the binding_level for
2167 the jump context; NAMES are the names in scope in LEVEL at the jump
2168 context; FILE and LINE are the source position of the jump or 0. */
2171 check_previous_goto_1 (tree decl,
2172 struct cp_binding_level* level,
2173 tree names, const location_t *locus)
2177 struct cp_binding_level *b = current_binding_level;
2178 for (; b; b = b->level_chain)
2180 tree new_decls = b->names;
2181 tree old_decls = (b == level ? names : NULL_TREE);
2182 for (; new_decls != old_decls;
2183 new_decls = TREE_CHAIN (new_decls))
2185 int problem = decl_jump_unsafe (new_decls);
2192 pedwarn ("jump to label `%D'", decl);
2194 pedwarn ("jump to case label");
2197 pedwarn ("%H from here", locus);
2202 cp_error_at (" crosses initialization of `%#D'",
2205 cp_pedwarn_at (" enters scope of non-POD `%#D'",
2211 if ((b->kind == sk_try || b->kind == sk_catch) && ! saw_eh)
2216 pedwarn ("jump to label `%D'", decl);
2218 pedwarn ("jump to case label");
2221 pedwarn ("%H from here", locus);
2224 if (b->kind == sk_try)
2225 error (" enters try block");
2227 error (" enters catch block");
2234 check_previous_goto (struct named_label_use_list* use)
2236 check_previous_goto_1 (use->label_decl, use->binding_level,
2237 use->names_in_scope, &use->o_goto_locus);
2241 check_switch_goto (struct cp_binding_level* level)
2243 check_previous_goto_1 (NULL_TREE, level, level->names, NULL);
2246 /* Check that any previously seen jumps to a newly defined label DECL
2247 are OK. Called by define_label. */
2250 check_previous_gotos (tree decl)
2252 struct named_label_use_list **usep;
2254 if (! TREE_USED (decl))
2257 for (usep = &named_label_uses; *usep; )
2259 struct named_label_use_list *use = *usep;
2260 if (use->label_decl == decl)
2262 check_previous_goto (use);
2266 usep = &(use->next);
2270 /* Check that a new jump to a label DECL is OK. Called by
2271 finish_goto_stmt. */
2274 check_goto (tree decl)
2278 struct named_label_list *lab;
2280 /* We can't know where a computed goto is jumping. So we assume
2282 if (! DECL_P (decl))
2285 /* If the label hasn't been defined yet, defer checking. */
2286 if (! DECL_INITIAL (decl))
2292 for (lab = named_labels; lab; lab = lab->next)
2293 if (decl == lab->label_decl)
2296 /* If the label is not on named_labels it's a gcc local label, so
2297 it must be in an outer scope, so jumping to it is always OK. */
2301 if ((lab->in_try_scope || lab->in_catch_scope || lab->bad_decls)
2304 cp_pedwarn_at ("jump to label `%D'", decl);
2305 pedwarn (" from here");
2309 for (bad = lab->bad_decls; bad; bad = TREE_CHAIN (bad))
2311 tree b = TREE_VALUE (bad);
2312 int u = decl_jump_unsafe (b);
2314 if (u > 1 && DECL_ARTIFICIAL (b))
2315 /* Can't skip init of __exception_info. */
2316 error ("%J enters catch block", b);
2318 cp_error_at (" skips initialization of `%#D'", b);
2320 cp_pedwarn_at (" enters scope of non-POD `%#D'", b);
2323 if (lab->in_try_scope)
2324 error (" enters try block");
2325 else if (lab->in_catch_scope)
2326 error (" enters catch block");
2329 /* Define a label, specifying the location in the source file.
2330 Return the LABEL_DECL node for the label. */
2333 define_label (location_t location, tree name)
2335 tree decl = lookup_label (name);
2336 struct named_label_list *ent;
2337 struct cp_binding_level *p;
2339 timevar_push (TV_NAME_LOOKUP);
2340 for (ent = named_labels; ent; ent = ent->next)
2341 if (ent->label_decl == decl)
2344 /* After labels, make any new cleanups in the function go into their
2345 own new (temporary) binding contour. */
2346 for (p = current_binding_level;
2347 p->kind != sk_function_parms;
2349 p->more_cleanups_ok = 0;
2351 if (name == get_identifier ("wchar_t"))
2352 pedwarn ("label named wchar_t");
2354 if (DECL_INITIAL (decl) != NULL_TREE)
2355 error ("duplicate label `%D'", decl);
2358 /* Mark label as having been defined. */
2359 DECL_INITIAL (decl) = error_mark_node;
2360 /* Say where in the source. */
2361 DECL_SOURCE_LOCATION (decl) = location;
2364 ent->names_in_scope = current_binding_level->names;
2365 ent->binding_level = current_binding_level;
2367 check_previous_gotos (decl);
2370 timevar_pop (TV_NAME_LOOKUP);
2376 struct cp_binding_level *level;
2377 struct cp_switch *next;
2378 /* The SWITCH_STMT being built. */
2380 /* A splay-tree mapping the low element of a case range to the high
2381 element, or NULL_TREE if there is no high element. Used to
2382 determine whether or not a new case label duplicates an old case
2383 label. We need a tree, rather than simply a hash table, because
2384 of the GNU case range extension. */
2388 /* A stack of the currently active switch statements. The innermost
2389 switch statement is on the top of the stack. There is no need to
2390 mark the stack for garbage collection because it is only active
2391 during the processing of the body of a function, and we never
2392 collect at that point. */
2394 static struct cp_switch *switch_stack;
2396 /* Called right after a switch-statement condition is parsed.
2397 SWITCH_STMT is the switch statement being parsed. */
2400 push_switch (tree switch_stmt)
2402 struct cp_switch *p = xmalloc (sizeof (struct cp_switch));
2403 p->level = current_binding_level;
2404 p->next = switch_stack;
2405 p->switch_stmt = switch_stmt;
2406 p->cases = splay_tree_new (case_compare, NULL, NULL);
2413 struct cp_switch *cs = switch_stack;
2415 /* Emit warnings as needed. */
2416 c_do_switch_warnings (cs->cases, cs->switch_stmt);
2418 splay_tree_delete (cs->cases);
2419 switch_stack = switch_stack->next;
2423 /* Note that we've seen a definition of a case label, and complain if this
2424 is a bad place for one. */
2427 finish_case_label (tree low_value, tree high_value)
2430 struct cp_binding_level *p;
2432 if (processing_template_decl)
2436 /* For templates, just add the case label; we'll do semantic
2437 analysis at instantiation-time. */
2438 label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
2439 return add_stmt (build_case_label (low_value, high_value, label));
2442 /* Find the condition on which this switch statement depends. */
2443 cond = SWITCH_COND (switch_stack->switch_stmt);
2444 if (cond && TREE_CODE (cond) == TREE_LIST)
2445 cond = TREE_VALUE (cond);
2447 r = c_add_case_label (switch_stack->cases, cond, low_value, high_value);
2449 check_switch_goto (switch_stack->level);
2451 /* After labels, make any new cleanups in the function go into their
2452 own new (temporary) binding contour. */
2453 for (p = current_binding_level;
2454 p->kind != sk_function_parms;
2456 p->more_cleanups_ok = 0;
2461 /* Hash a TYPENAME_TYPE. K is really of type `tree'. */
2464 typename_hash (const void* k)
2469 hash = (htab_hash_pointer (TYPE_CONTEXT (t))
2470 ^ htab_hash_pointer (DECL_NAME (TYPE_NAME (t))));
2475 /* Compare two TYPENAME_TYPEs. K1 and K2 are really of type `tree'. */
2478 typename_compare (const void * k1, const void * k2)
2487 d1 = TYPE_NAME (t1);
2488 d2 = TYPE_NAME (t2);
2490 return (DECL_NAME (d1) == DECL_NAME (d2)
2491 && TYPE_CONTEXT (t1) == TYPE_CONTEXT (t2)
2492 && ((TREE_TYPE (t1) != NULL_TREE)
2493 == (TREE_TYPE (t2) != NULL_TREE))
2494 && same_type_p (TREE_TYPE (t1), TREE_TYPE (t2))
2495 && TYPENAME_TYPE_FULLNAME (t1) == TYPENAME_TYPE_FULLNAME (t2));
2498 /* Build a TYPENAME_TYPE. If the type is `typename T::t', CONTEXT is
2499 the type of `T', NAME is the IDENTIFIER_NODE for `t'. If BASE_TYPE
2500 is non-NULL, this type is being created by the implicit typename
2501 extension, and BASE_TYPE is a type named `t' in some base class of
2502 `T' which depends on template parameters.
2504 Returns the new TYPENAME_TYPE. */
2506 static GTY ((param_is (union tree_node))) htab_t typename_htab;
2509 build_typename_type (tree context, tree name, tree fullname)
2515 if (typename_htab == NULL)
2517 typename_htab = htab_create_ggc (61, &typename_hash,
2518 &typename_compare, NULL);
2521 /* Build the TYPENAME_TYPE. */
2522 t = make_aggr_type (TYPENAME_TYPE);
2523 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2524 TYPENAME_TYPE_FULLNAME (t) = fullname;
2526 /* Build the corresponding TYPE_DECL. */
2527 d = build_decl (TYPE_DECL, name, t);
2528 TYPE_NAME (TREE_TYPE (d)) = d;
2529 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2530 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2531 DECL_ARTIFICIAL (d) = 1;
2533 /* See if we already have this type. */
2534 e = htab_find_slot (typename_htab, t, INSERT);
2543 /* Resolve `typename CONTEXT::NAME'. Returns an appropriate type,
2544 unless an error occurs, in which case error_mark_node is returned.
2545 If we locate a non-artificial TYPE_DECL and TF_KEEP_TYPE_DECL is
2546 set, we return that, rather than the _TYPE it corresponds to, in
2547 other cases we look through the type decl. If TF_ERROR is set,
2548 complain about errors, otherwise be quiet. */
2551 make_typename_type (tree context, tree name, tsubst_flags_t complain)
2555 if (name == error_mark_node
2556 || context == NULL_TREE
2557 || context == error_mark_node)
2558 return error_mark_node;
2562 if (!(TYPE_LANG_SPECIFIC (name)
2563 && (CLASSTYPE_IS_TEMPLATE (name)
2564 || CLASSTYPE_USE_TEMPLATE (name))))
2565 name = TYPE_IDENTIFIER (name);
2567 /* Create a TEMPLATE_ID_EXPR for the type. */
2568 name = build_nt (TEMPLATE_ID_EXPR,
2569 CLASSTYPE_TI_TEMPLATE (name),
2570 CLASSTYPE_TI_ARGS (name));
2572 else if (TREE_CODE (name) == TYPE_DECL)
2573 name = DECL_NAME (name);
2577 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
2579 name = TREE_OPERAND (name, 0);
2580 if (TREE_CODE (name) == TEMPLATE_DECL)
2581 name = TREE_OPERAND (fullname, 0) = DECL_NAME (name);
2583 if (TREE_CODE (name) == TEMPLATE_DECL)
2585 error ("`%D' used without template parameters", name);
2586 return error_mark_node;
2588 my_friendly_assert (TREE_CODE (name) == IDENTIFIER_NODE, 20030802);
2590 if (TREE_CODE (context) == NAMESPACE_DECL)
2592 /* We can get here from typename_sub0 in the explicit_template_type
2593 expansion. Just fail. */
2594 if (complain & tf_error)
2595 error ("no class template named `%#T' in `%#T'",
2597 return error_mark_node;
2600 if (!dependent_type_p (context)
2601 || currently_open_class (context))
2603 if (TREE_CODE (fullname) == TEMPLATE_ID_EXPR)
2605 tree tmpl = NULL_TREE;
2606 if (IS_AGGR_TYPE (context))
2607 tmpl = lookup_field (context, name, 0, false);
2608 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2610 if (complain & tf_error)
2611 error ("no class template named `%#T' in `%#T'",
2613 return error_mark_node;
2616 if (complain & tf_error)
2617 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2619 return lookup_template_class (tmpl,
2620 TREE_OPERAND (fullname, 1),
2622 /*entering_scope=*/0,
2623 tf_error | tf_warning | tf_user);
2629 if (!IS_AGGR_TYPE (context))
2631 if (complain & tf_error)
2632 error ("no type named `%#T' in `%#T'", name, context);
2633 return error_mark_node;
2636 t = lookup_field (context, name, 0, true);
2639 if (TREE_CODE (t) != TYPE_DECL)
2641 if (complain & tf_error)
2642 error ("no type named `%#T' in `%#T'", name, context);
2643 return error_mark_node;
2646 if (complain & tf_error)
2647 perform_or_defer_access_check (TYPE_BINFO (context), t);
2649 if (DECL_ARTIFICIAL (t) || !(complain & tf_keep_type_decl))
2657 /* If the CONTEXT is not a template type, then either the field is
2658 there now or its never going to be. */
2659 if (!dependent_type_p (context))
2661 if (complain & tf_error)
2662 error ("no type named `%#T' in `%#T'", name, context);
2663 return error_mark_node;
2666 return build_typename_type (context, name, fullname);
2669 /* Resolve `CONTEXT::template NAME'. Returns an appropriate type,
2670 unless an error occurs, in which case error_mark_node is returned.
2671 If we locate a TYPE_DECL, we return that, rather than the _TYPE it
2672 corresponds to. If COMPLAIN zero, don't complain about any errors
2676 make_unbound_class_template (tree context, tree name, tsubst_flags_t complain)
2682 name = TYPE_IDENTIFIER (name);
2683 else if (DECL_P (name))
2684 name = DECL_NAME (name);
2685 if (TREE_CODE (name) != IDENTIFIER_NODE)
2688 if (!dependent_type_p (context)
2689 || currently_open_class (context))
2691 tree tmpl = NULL_TREE;
2693 if (IS_AGGR_TYPE (context))
2694 tmpl = lookup_field (context, name, 0, false);
2696 if (!tmpl || !DECL_CLASS_TEMPLATE_P (tmpl))
2698 if (complain & tf_error)
2699 error ("no class template named `%#T' in `%#T'", name, context);
2700 return error_mark_node;
2703 if (complain & tf_error)
2704 perform_or_defer_access_check (TYPE_BINFO (context), tmpl);
2709 /* Build the UNBOUND_CLASS_TEMPLATE. */
2710 t = make_aggr_type (UNBOUND_CLASS_TEMPLATE);
2711 TYPE_CONTEXT (t) = FROB_CONTEXT (context);
2712 TREE_TYPE (t) = NULL_TREE;
2714 /* Build the corresponding TEMPLATE_DECL. */
2715 d = build_decl (TEMPLATE_DECL, name, t);
2716 TYPE_NAME (TREE_TYPE (d)) = d;
2717 TYPE_STUB_DECL (TREE_TYPE (d)) = d;
2718 DECL_CONTEXT (d) = FROB_CONTEXT (context);
2719 DECL_ARTIFICIAL (d) = 1;
2726 /* Push the declarations of builtin types into the namespace.
2727 RID_INDEX is the index of the builtin type in the array
2728 RID_POINTERS. NAME is the name used when looking up the builtin
2729 type. TYPE is the _TYPE node for the builtin type. */
2732 record_builtin_type (enum rid rid_index,
2736 tree rname = NULL_TREE, tname = NULL_TREE;
2737 tree tdecl = NULL_TREE;
2739 if ((int) rid_index < (int) RID_MAX)
2740 rname = ridpointers[(int) rid_index];
2742 tname = get_identifier (name);
2744 /* The calls to SET_IDENTIFIER_GLOBAL_VALUE below should be
2745 eliminated. Built-in types should not be looked up name; their
2746 names are keywords that the parser can recognize. However, there
2747 is code in c-common.c that uses identifier_global_value to look
2748 up built-in types by name. */
2751 tdecl = build_decl (TYPE_DECL, tname, type);
2752 DECL_ARTIFICIAL (tdecl) = 1;
2753 SET_IDENTIFIER_GLOBAL_VALUE (tname, tdecl);
2759 tdecl = build_decl (TYPE_DECL, rname, type);
2760 DECL_ARTIFICIAL (tdecl) = 1;
2762 SET_IDENTIFIER_GLOBAL_VALUE (rname, tdecl);
2765 if (!TYPE_NAME (type))
2766 TYPE_NAME (type) = tdecl;
2769 debug_hooks->type_decl (tdecl, 0);
2772 /* Record one of the standard Java types.
2773 * Declare it as having the given NAME.
2774 * If SIZE > 0, it is the size of one of the integral types;
2775 * otherwise it is the negative of the size of one of the other types. */
2778 record_builtin_java_type (const char* name, int size)
2782 type = make_signed_type (size);
2783 else if (size > -32)
2784 { /* "__java_char" or ""__java_boolean". */
2785 type = make_unsigned_type (-size);
2786 /*if (size == -1) TREE_SET_CODE (type, BOOLEAN_TYPE);*/
2789 { /* "__java_float" or ""__java_double". */
2790 type = make_node (REAL_TYPE);
2791 TYPE_PRECISION (type) = - size;
2794 record_builtin_type (RID_MAX, name, type);
2795 decl = TYPE_NAME (type);
2797 /* Suppress generate debug symbol entries for these types,
2798 since for normal C++ they are just clutter.
2799 However, push_lang_context undoes this if extern "Java" is seen. */
2800 DECL_IGNORED_P (decl) = 1;
2802 TYPE_FOR_JAVA (type) = 1;
2806 /* Push a type into the namespace so that the back-ends ignore it. */
2809 record_unknown_type (tree type, const char* name)
2811 tree decl = pushdecl (build_decl (TYPE_DECL, get_identifier (name), type));
2812 /* Make sure the "unknown type" typedecl gets ignored for debug info. */
2813 DECL_IGNORED_P (decl) = 1;
2814 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
2815 TYPE_SIZE (type) = TYPE_SIZE (void_type_node);
2816 TYPE_ALIGN (type) = 1;
2817 TYPE_USER_ALIGN (type) = 0;
2818 TYPE_MODE (type) = TYPE_MODE (void_type_node);
2821 /* An string for which we should create an IDENTIFIER_NODE at
2824 typedef struct predefined_identifier
2826 /* The name of the identifier. */
2827 const char *const name;
2828 /* The place where the IDENTIFIER_NODE should be stored. */
2830 /* Nonzero if this is the name of a constructor or destructor. */
2831 const int ctor_or_dtor_p;
2832 } predefined_identifier;
2834 /* Create all the predefined identifiers. */
2837 initialize_predefined_identifiers (void)
2839 const predefined_identifier *pid;
2841 /* A table of identifiers to create at startup. */
2842 static const predefined_identifier predefined_identifiers[] = {
2843 { "C++", &lang_name_cplusplus, 0 },
2844 { "C", &lang_name_c, 0 },
2845 { "Java", &lang_name_java, 0 },
2846 { CTOR_NAME, &ctor_identifier, 1 },
2847 { "__base_ctor", &base_ctor_identifier, 1 },
2848 { "__comp_ctor", &complete_ctor_identifier, 1 },
2849 { DTOR_NAME, &dtor_identifier, 1 },
2850 { "__comp_dtor", &complete_dtor_identifier, 1 },
2851 { "__base_dtor", &base_dtor_identifier, 1 },
2852 { "__deleting_dtor", &deleting_dtor_identifier, 1 },
2853 { IN_CHARGE_NAME, &in_charge_identifier, 0 },
2854 { "nelts", &nelts_identifier, 0 },
2855 { THIS_NAME, &this_identifier, 0 },
2856 { VTABLE_DELTA_NAME, &delta_identifier, 0 },
2857 { VTABLE_PFN_NAME, &pfn_identifier, 0 },
2858 { "_vptr", &vptr_identifier, 0 },
2859 { "__vtt_parm", &vtt_parm_identifier, 0 },
2860 { "::", &global_scope_name, 0 },
2861 { "std", &std_identifier, 0 },
2865 for (pid = predefined_identifiers; pid->name; ++pid)
2867 *pid->node = get_identifier (pid->name);
2868 if (pid->ctor_or_dtor_p)
2869 IDENTIFIER_CTOR_OR_DTOR_P (*pid->node) = 1;
2873 /* Create the predefined scalar types of C,
2874 and some nodes representing standard constants (0, 1, (void *)0).
2875 Initialize the global binding level.
2876 Make definitions for built-in primitive functions. */
2879 cxx_init_decl_processing (void)
2882 tree void_ftype_ptr;
2884 build_common_tree_nodes (flag_signed_char);
2886 /* Create all the identifiers we need. */
2887 initialize_predefined_identifiers ();
2889 /* Create the global variables. */
2890 push_to_top_level ();
2892 current_function_decl = NULL_TREE;
2893 current_binding_level = NULL;
2894 /* Enter the global namespace. */
2895 my_friendly_assert (global_namespace == NULL_TREE, 375);
2896 global_namespace = build_lang_decl (NAMESPACE_DECL, global_scope_name,
2898 begin_scope (sk_namespace, global_namespace);
2900 current_lang_name = NULL_TREE;
2902 /* Adjust various flags based on command-line settings. */
2903 if (!flag_permissive)
2904 flag_pedantic_errors = 1;
2905 if (!flag_no_inline)
2907 flag_inline_trees = 1;
2910 if (flag_inline_functions)
2912 flag_inline_trees = 2;
2913 flag_inline_functions = 0;
2916 /* Force minimum function alignment if using the least significant
2917 bit of function pointers to store the virtual bit. */
2918 if (TARGET_PTRMEMFUNC_VBIT_LOCATION == ptrmemfunc_vbit_in_pfn
2919 && force_align_functions_log < 1)
2920 force_align_functions_log = 1;
2923 current_lang_name = lang_name_c;
2925 error_mark_list = build_tree_list (error_mark_node, error_mark_node);
2926 TREE_TYPE (error_mark_list) = error_mark_node;
2928 /* Create the `std' namespace. */
2929 push_namespace (std_identifier);
2930 std_node = current_namespace;
2933 c_common_nodes_and_builtins ();
2935 java_byte_type_node = record_builtin_java_type ("__java_byte", 8);
2936 java_short_type_node = record_builtin_java_type ("__java_short", 16);
2937 java_int_type_node = record_builtin_java_type ("__java_int", 32);
2938 java_long_type_node = record_builtin_java_type ("__java_long", 64);
2939 java_float_type_node = record_builtin_java_type ("__java_float", -32);
2940 java_double_type_node = record_builtin_java_type ("__java_double", -64);
2941 java_char_type_node = record_builtin_java_type ("__java_char", -16);
2942 java_boolean_type_node = record_builtin_java_type ("__java_boolean", -1);
2944 integer_two_node = build_int_2 (2, 0);
2945 TREE_TYPE (integer_two_node) = integer_type_node;
2946 integer_three_node = build_int_2 (3, 0);
2947 TREE_TYPE (integer_three_node) = integer_type_node;
2949 record_builtin_type (RID_BOOL, "bool", boolean_type_node);
2950 truthvalue_type_node = boolean_type_node;
2951 truthvalue_false_node = boolean_false_node;
2952 truthvalue_true_node = boolean_true_node;
2954 empty_except_spec = build_tree_list (NULL_TREE, NULL_TREE);
2957 record_builtin_type (RID_MAX, NULL, string_type_node);
2960 delta_type_node = ptrdiff_type_node;
2961 vtable_index_type = ptrdiff_type_node;
2963 vtt_parm_type = build_pointer_type (const_ptr_type_node);
2964 void_ftype = build_function_type (void_type_node, void_list_node);
2965 void_ftype_ptr = build_function_type (void_type_node,
2966 tree_cons (NULL_TREE,
2970 = build_exception_variant (void_ftype_ptr, empty_except_spec);
2972 /* C++ extensions */
2974 unknown_type_node = make_node (UNKNOWN_TYPE);
2975 record_unknown_type (unknown_type_node, "unknown type");
2977 /* Indirecting an UNKNOWN_TYPE node yields an UNKNOWN_TYPE node. */
2978 TREE_TYPE (unknown_type_node) = unknown_type_node;
2980 /* Looking up TYPE_POINTER_TO and TYPE_REFERENCE_TO yield the same
2982 TYPE_POINTER_TO (unknown_type_node) = unknown_type_node;
2983 TYPE_REFERENCE_TO (unknown_type_node) = unknown_type_node;
2986 /* Make sure we get a unique function type, so we can give
2987 its pointer type a name. (This wins for gdb.) */
2988 tree vfunc_type = make_node (FUNCTION_TYPE);
2989 TREE_TYPE (vfunc_type) = integer_type_node;
2990 TYPE_ARG_TYPES (vfunc_type) = NULL_TREE;
2991 layout_type (vfunc_type);
2993 vtable_entry_type = build_pointer_type (vfunc_type);
2995 record_builtin_type (RID_MAX, VTBL_PTR_TYPE, vtable_entry_type);
2998 = build_cplus_array_type (vtable_entry_type, NULL_TREE);
2999 layout_type (vtbl_type_node);
3000 vtbl_type_node = build_qualified_type (vtbl_type_node, TYPE_QUAL_CONST);
3001 record_builtin_type (RID_MAX, NULL, vtbl_type_node);
3002 vtbl_ptr_type_node = build_pointer_type (vtable_entry_type);
3003 layout_type (vtbl_ptr_type_node);
3004 record_builtin_type (RID_MAX, NULL, vtbl_ptr_type_node);
3006 push_namespace (get_identifier ("__cxxabiv1"));
3007 abi_node = current_namespace;
3010 global_type_node = make_node (LANG_TYPE);
3011 record_unknown_type (global_type_node, "global type");
3014 current_lang_name = lang_name_cplusplus;
3018 tree bad_alloc_type_node;
3019 tree bad_alloc_decl;
3020 tree newtype, deltype;
3021 tree ptr_ftype_sizetype;
3023 push_namespace (std_identifier);
3024 bad_alloc_id = get_identifier ("bad_alloc");
3025 bad_alloc_type_node = make_aggr_type (RECORD_TYPE);
3026 TYPE_CONTEXT (bad_alloc_type_node) = current_namespace;
3028 = create_implicit_typedef (bad_alloc_id, bad_alloc_type_node);
3029 DECL_CONTEXT (bad_alloc_decl) = current_namespace;
3030 TYPE_STUB_DECL (bad_alloc_type_node) = bad_alloc_decl;
3034 = build_function_type (ptr_type_node,
3035 tree_cons (NULL_TREE,
3038 newtype = build_exception_variant
3039 (ptr_ftype_sizetype, add_exception_specifier
3040 (NULL_TREE, bad_alloc_type_node, -1));
3041 deltype = build_exception_variant (void_ftype_ptr, empty_except_spec);
3042 push_cp_library_fn (NEW_EXPR, newtype);
3043 push_cp_library_fn (VEC_NEW_EXPR, newtype);
3044 global_delete_fndecl = push_cp_library_fn (DELETE_EXPR, deltype);
3045 push_cp_library_fn (VEC_DELETE_EXPR, deltype);
3049 = build_library_fn_ptr ("__cxa_pure_virtual", void_ftype);
3051 /* Perform other language dependent initializations. */
3052 init_class_processing ();
3053 init_rtti_processing ();
3055 if (flag_exceptions)
3056 init_exception_processing ();
3058 if (! supports_one_only ())
3061 make_fname_decl = cp_make_fname_decl;
3062 start_fname_decls ();
3064 /* Show we use EH for cleanups. */
3065 if (flag_exceptions)
3066 using_eh_for_cleanups ();
3069 /* Generate an initializer for a function naming variable from
3070 NAME. NAME may be NULL, to indicate a dependent name. TYPE_P is
3071 filled in with the type of the init. */
3074 cp_fname_init (const char* name, tree *type_p)
3076 tree domain = NULL_TREE;
3078 tree init = NULL_TREE;
3083 length = strlen (name);
3084 domain = build_index_type (size_int (length));
3085 init = build_string (length + 1, name);
3088 type = build_qualified_type (char_type_node, TYPE_QUAL_CONST);
3089 type = build_cplus_array_type (type, domain);
3094 TREE_TYPE (init) = type;
3096 init = error_mark_node;
3101 /* Create the VAR_DECL for __FUNCTION__ etc. ID is the name to give the
3102 decl, NAME is the initialization string and TYPE_DEP indicates whether
3103 NAME depended on the type of the function. We make use of that to detect
3104 __PRETTY_FUNCTION__ inside a template fn. This is being done
3105 lazily at the point of first use, so we mustn't push the decl now. */
3108 cp_make_fname_decl (tree id, int type_dep)
3110 const char *const name = (type_dep && processing_template_decl
3111 ? NULL : fname_as_string (type_dep));
3113 tree init = cp_fname_init (name, &type);
3114 tree decl = build_decl (VAR_DECL, id, type);
3117 free ((char *) name);
3119 /* As we're using pushdecl_with_scope, we must set the context. */
3120 DECL_CONTEXT (decl) = current_function_decl;
3121 DECL_PRETTY_FUNCTION_P (decl) = type_dep;
3123 TREE_STATIC (decl) = 1;
3124 TREE_READONLY (decl) = 1;
3125 DECL_ARTIFICIAL (decl) = 1;
3126 DECL_INITIAL (decl) = init;
3128 TREE_USED (decl) = 1;
3130 if (current_function_decl)
3132 struct cp_binding_level *b = current_binding_level;
3133 while (b->level_chain->kind != sk_function_parms)
3135 pushdecl_with_scope (decl, b);
3136 cp_finish_decl (decl, init, NULL_TREE, LOOKUP_ONLYCONVERTING);
3139 pushdecl_top_level_and_finish (decl, init);
3144 /* Make a definition for a builtin function named NAME in the current
3145 namespace, whose data type is TYPE and whose context is CONTEXT.
3146 TYPE should be a function type with argument types.
3148 CLASS and CODE tell later passes how to compile calls to this function.
3149 See tree.h for possible values.
3151 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3152 the name to be called if we can't opencode the function.
3153 If ATTRS is nonzero, use that for the function's attribute
3157 builtin_function_1 (const char* name,
3161 enum built_in_class class,
3162 const char* libname,
3165 tree decl = build_library_fn_1 (get_identifier (name), ERROR_MARK, type);
3166 DECL_BUILT_IN_CLASS (decl) = class;
3167 DECL_FUNCTION_CODE (decl) = code;
3168 DECL_CONTEXT (decl) = context;
3172 /* Since `pushdecl' relies on DECL_ASSEMBLER_NAME instead of DECL_NAME,
3173 we cannot change DECL_ASSEMBLER_NAME until we have installed this
3174 function in the namespace. */
3176 SET_DECL_ASSEMBLER_NAME (decl, get_identifier (libname));
3178 /* Warn if a function in the namespace for users
3179 is used without an occasion to consider it declared. */
3180 if (name[0] != '_' || name[1] != '_')
3181 DECL_ANTICIPATED (decl) = 1;
3183 /* Possibly apply some default attributes to this built-in function. */
3185 decl_attributes (&decl, attrs, ATTR_FLAG_BUILT_IN);
3187 decl_attributes (&decl, NULL_TREE, 0);
3192 /* Entry point for the benefit of c_common_nodes_and_builtins.
3194 Make a definition for a builtin function named NAME and whose data type
3195 is TYPE. TYPE should be a function type with argument types. This
3196 function places the anticipated declaration in the global namespace
3197 and additionally in the std namespace if appropriate.
3199 CLASS and CODE tell later passes how to compile calls to this function.
3200 See tree.h for possible values.
3202 If LIBNAME is nonzero, use that for DECL_ASSEMBLER_NAME,
3203 the name to be called if we can't opencode the function.
3205 If ATTRS is nonzero, use that for the function's attribute
3209 builtin_function (const char* name,
3212 enum built_in_class class,
3213 const char* libname,
3216 /* All builtins that don't begin with an '_' should additionally
3217 go in the 'std' namespace. */
3220 push_namespace (std_identifier);
3221 builtin_function_1 (name, type, std_node, code, class, libname, attrs);
3225 return builtin_function_1 (name, type, NULL_TREE, code,
3226 class, libname, attrs);
3229 /* Generate a FUNCTION_DECL with the typical flags for a runtime library
3230 function. Not called directly. */
3233 build_library_fn_1 (tree name, enum tree_code operator_code, tree type)
3235 tree fn = build_lang_decl (FUNCTION_DECL, name, type);
3236 DECL_EXTERNAL (fn) = 1;
3237 TREE_PUBLIC (fn) = 1;
3238 DECL_ARTIFICIAL (fn) = 1;
3239 TREE_NOTHROW (fn) = 1;
3240 SET_OVERLOADED_OPERATOR_CODE (fn, operator_code);
3241 SET_DECL_LANGUAGE (fn, lang_c);
3245 /* Returns the _DECL for a library function with C linkage.
3246 We assume that such functions never throw; if this is incorrect,
3247 callers should unset TREE_NOTHROW. */
3250 build_library_fn (tree name, tree type)
3252 return build_library_fn_1 (name, ERROR_MARK, type);
3255 /* Returns the _DECL for a library function with C++ linkage. */
3258 build_cp_library_fn (tree name, enum tree_code operator_code, tree type)
3260 tree fn = build_library_fn_1 (name, operator_code, type);
3261 TREE_NOTHROW (fn) = TYPE_NOTHROW_P (type);
3262 DECL_CONTEXT (fn) = FROB_CONTEXT (current_namespace);
3263 SET_DECL_LANGUAGE (fn, lang_cplusplus);
3267 /* Like build_library_fn, but takes a C string instead of an
3271 build_library_fn_ptr (const char* name, tree type)
3273 return build_library_fn (get_identifier (name), type);
3276 /* Like build_cp_library_fn, but takes a C string instead of an
3280 build_cp_library_fn_ptr (const char* name, tree type)
3282 return build_cp_library_fn (get_identifier (name), ERROR_MARK, type);
3285 /* Like build_library_fn, but also pushes the function so that we will
3286 be able to find it via IDENTIFIER_GLOBAL_VALUE. */
3289 push_library_fn (tree name, tree type)
3291 tree fn = build_library_fn (name, type);
3292 pushdecl_top_level (fn);
3296 /* Like build_cp_library_fn, but also pushes the function so that it
3297 will be found by normal lookup. */
3300 push_cp_library_fn (enum tree_code operator_code, tree type)
3302 tree fn = build_cp_library_fn (ansi_opname (operator_code),
3309 /* Like push_library_fn, but takes a TREE_LIST of parm types rather than
3313 push_void_library_fn (tree name, tree parmtypes)
3315 tree type = build_function_type (void_type_node, parmtypes);
3316 return push_library_fn (name, type);
3319 /* Like push_library_fn, but also note that this function throws
3320 and does not return. Used for __throw_foo and the like. */
3323 push_throw_library_fn (tree name, tree type)
3325 tree fn = push_library_fn (name, type);
3326 TREE_THIS_VOLATILE (fn) = 1;
3327 TREE_NOTHROW (fn) = 0;
3331 /* When we call finish_struct for an anonymous union, we create
3332 default copy constructors and such. But, an anonymous union
3333 shouldn't have such things; this function undoes the damage to the
3334 anonymous union type T.
3336 (The reason that we create the synthesized methods is that we don't
3337 distinguish `union { int i; }' from `typedef union { int i; } U'.
3338 The first is an anonymous union; the second is just an ordinary
3342 fixup_anonymous_aggr (tree t)
3346 /* Wipe out memory of synthesized methods. */
3347 TYPE_HAS_CONSTRUCTOR (t) = 0;
3348 TYPE_HAS_DEFAULT_CONSTRUCTOR (t) = 0;
3349 TYPE_HAS_INIT_REF (t) = 0;
3350 TYPE_HAS_CONST_INIT_REF (t) = 0;
3351 TYPE_HAS_ASSIGN_REF (t) = 0;
3352 TYPE_HAS_CONST_ASSIGN_REF (t) = 0;
3354 /* Splice the implicitly generated functions out of the TYPE_METHODS
3356 q = &TYPE_METHODS (t);
3359 if (DECL_ARTIFICIAL (*q))
3360 *q = TREE_CHAIN (*q);
3362 q = &TREE_CHAIN (*q);
3365 /* ISO C++ 9.5.3. Anonymous unions may not have function members. */
3366 if (TYPE_METHODS (t))
3367 error ("%Jan anonymous union cannot have function members",
3368 TYPE_MAIN_DECL (t));
3370 /* Anonymous aggregates cannot have fields with ctors, dtors or complex
3371 assignment operators (because they cannot have these methods themselves).
3372 For anonymous unions this is already checked because they are not allowed
3373 in any union, otherwise we have to check it. */
3374 if (TREE_CODE (t) != UNION_TYPE)
3378 for (field = TYPE_FIELDS (t); field; field = TREE_CHAIN (field))
3379 if (TREE_CODE (field) == FIELD_DECL)
3381 type = TREE_TYPE (field);
3382 if (CLASS_TYPE_P (type))
3384 if (TYPE_NEEDS_CONSTRUCTING (type))
3385 cp_error_at ("member %#D' with constructor not allowed in anonymous aggregate",
3387 if (TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3388 cp_error_at ("member %#D' with destructor not allowed in anonymous aggregate",
3390 if (TYPE_HAS_COMPLEX_ASSIGN_REF (type))
3391 cp_error_at ("member %#D' with copy assignment operator not allowed in anonymous aggregate",
3398 /* Make sure that a declaration with no declarator is well-formed, i.e.
3399 just declares a tagged type or anonymous union.
3401 Returns the type declared; or NULL_TREE if none. */
3404 check_tag_decl (cp_decl_specifier_seq *declspecs)
3406 int saw_friend = declspecs->specs[(int)ds_friend] != 0;
3407 int saw_typedef = declspecs->specs[(int)ds_typedef] != 0;
3408 /* If a class, struct, or enum type is declared by the DECLSPECS
3409 (i.e, if a class-specifier, enum-specifier, or non-typename
3410 elaborated-type-specifier appears in the DECLSPECS),
3411 DECLARED_TYPE is set to the corresponding type. */
3412 tree declared_type = NULL_TREE;
3413 bool error_p = false;
3415 if (declspecs->multiple_types_p)
3416 error ("multiple types in one declaration");
3417 else if (declspecs->redefined_builtin_type)
3419 if (!in_system_header)
3420 pedwarn ("redeclaration of C++ built-in type %qT",
3421 declspecs->redefined_builtin_type);
3425 if (TYPE_P (declspecs->type)
3426 && ((TREE_CODE (declspecs->type) != TYPENAME_TYPE
3427 && IS_AGGR_TYPE (declspecs->type))
3428 || TREE_CODE (declspecs->type) == ENUMERAL_TYPE))
3429 declared_type = declspecs->type;
3430 else if (declspecs->type == error_mark_node)
3432 if (declared_type == NULL_TREE && ! saw_friend && !error_p)
3433 pedwarn ("declaration does not declare anything");
3434 /* Check for an anonymous union. */
3435 else if (declared_type && IS_AGGR_TYPE_CODE (TREE_CODE (declared_type))
3436 && TYPE_ANONYMOUS_P (declared_type))
3438 /* 7/3 In a simple-declaration, the optional init-declarator-list
3439 can be omitted only when declaring a class (clause 9) or
3440 enumeration (7.2), that is, when the decl-specifier-seq contains
3441 either a class-specifier, an elaborated-type-specifier with
3442 a class-key (9.1), or an enum-specifier. In these cases and
3443 whenever a class-specifier or enum-specifier is present in the
3444 decl-specifier-seq, the identifiers in these specifiers are among
3445 the names being declared by the declaration (as class-name,
3446 enum-names, or enumerators, depending on the syntax). In such
3447 cases, and except for the declaration of an unnamed bit-field (9.6),
3448 the decl-specifier-seq shall introduce one or more names into the
3449 program, or shall redeclare a name introduced by a previous
3450 declaration. [Example:
3451 enum { }; // ill-formed
3452 typedef class { }; // ill-formed
3456 error ("missing type-name in typedef-declaration");
3459 /* Anonymous unions are objects, so they can have specifiers. */;
3460 SET_ANON_AGGR_TYPE_P (declared_type);
3462 if (TREE_CODE (declared_type) != UNION_TYPE && pedantic
3463 && !in_system_header)
3464 pedwarn ("ISO C++ prohibits anonymous structs");
3469 if (declspecs->specs[(int)ds_inline]
3470 || declspecs->specs[(int)ds_virtual])
3471 error ("`%s' can only be specified for functions",
3472 declspecs->specs[(int)ds_inline]
3473 ? "inline" : "virtual");
3475 && (!current_class_type
3476 || current_scope () != current_class_type))
3477 error ("`friend' can only be specified inside a class");
3478 else if (declspecs->specs[(int)ds_explicit])
3479 error ("`explicit' can only be specified for constructors");
3480 else if (declspecs->storage_class)
3481 error ("a storage class can only be specified for objects "
3483 else if (declspecs->specs[(int)ds_const]
3484 || declspecs->specs[(int)ds_volatile]
3485 || declspecs->specs[(int)ds_restrict]
3486 || declspecs->specs[(int)ds_thread])
3487 error ("qualifiers can only be specified for objects "
3491 return declared_type;
3494 /* Called when a declaration is seen that contains no names to declare.
3495 If its type is a reference to a structure, union or enum inherited
3496 from a containing scope, shadow that tag name for the current scope
3497 with a forward reference.
3498 If its type defines a new named structure or union
3499 or defines an enum, it is valid but we need not do anything here.
3500 Otherwise, it is an error.
3502 C++: may have to grok the declspecs to learn about static,
3503 complain for anonymous unions.
3505 Returns the TYPE declared -- or NULL_TREE if none. */
3508 shadow_tag (cp_decl_specifier_seq *declspecs)
3510 tree t = check_tag_decl (declspecs);
3515 maybe_process_partial_specialization (t);
3517 /* This is where the variables in an anonymous union are
3518 declared. An anonymous union declaration looks like:
3520 because there is no declarator after the union, the parser
3521 sends that declaration here. */
3522 if (ANON_AGGR_TYPE_P (t))
3524 fixup_anonymous_aggr (t);
3526 if (TYPE_FIELDS (t))
3528 tree decl = grokdeclarator (/*declarator=*/NULL,
3529 declspecs, NORMAL, 0, NULL);
3530 finish_anon_union (decl);
3537 /* Decode a "typename", such as "int **", returning a ..._TYPE node. */
3540 groktypename (cp_decl_specifier_seq *type_specifiers,
3541 const cp_declarator *declarator)
3545 attrs = type_specifiers->attributes;
3546 type_specifiers->attributes = NULL_TREE;
3547 type = grokdeclarator (declarator, type_specifiers, TYPENAME, 0, &attrs);
3549 cplus_decl_attributes (&type, attrs, 0);
3553 /* Decode a declarator in an ordinary declaration or data definition.
3554 This is called as soon as the type information and variable name
3555 have been parsed, before parsing the initializer if any.
3556 Here we create the ..._DECL node, fill in its type,
3557 and put it on the list of decls for the current context.
3558 The ..._DECL node is returned as the value.
3560 Exception: for arrays where the length is not specified,
3561 the type is left null, to be filled in by `cp_finish_decl'.
3563 Function definitions do not come here; they go to start_function
3564 instead. However, external and forward declarations of functions
3565 do go through here. Structure field declarations are done by
3566 grokfield and not through here. */
3569 start_decl (const cp_declarator *declarator,
3570 cp_decl_specifier_seq *declspecs,
3573 tree prefix_attributes)
3579 /* This should only be done once on the top most decl. */
3580 if (have_extern_spec)
3582 declspecs->storage_class = sc_extern;
3583 have_extern_spec = false;
3586 /* An object declared as __attribute__((deprecated)) suppresses
3587 warnings of uses of other deprecated items. */
3588 if (lookup_attribute ("deprecated", attributes))
3589 deprecated_state = DEPRECATED_SUPPRESS;
3591 attributes = chainon (attributes, prefix_attributes);
3593 decl = grokdeclarator (declarator, declspecs, NORMAL, initialized,
3596 deprecated_state = DEPRECATED_NORMAL;
3598 if (decl == NULL_TREE || TREE_CODE (decl) == VOID_TYPE)
3601 type = TREE_TYPE (decl);
3603 if (type == error_mark_node)
3606 context = DECL_CONTEXT (decl);
3608 if (initialized && context && TREE_CODE (context) == NAMESPACE_DECL
3609 && context != current_namespace && TREE_CODE (decl) == VAR_DECL)
3611 /* When parsing the initializer, lookup should use the object's
3613 push_decl_namespace (context);
3616 /* We are only interested in class contexts, later. */
3617 if (context && TREE_CODE (context) == NAMESPACE_DECL)
3618 context = NULL_TREE;
3621 /* Is it valid for this decl to have an initializer at all?
3622 If not, set INITIALIZED to zero, which will indirectly
3623 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3624 switch (TREE_CODE (decl))
3627 error ("typedef `%D' is initialized (use __typeof__ instead)", decl);
3632 error ("function `%#D' is initialized like a variable", decl);
3642 if (! toplevel_bindings_p ()
3643 && DECL_EXTERNAL (decl))
3644 warning ("declaration of `%#D' has `extern' and is initialized",
3646 DECL_EXTERNAL (decl) = 0;
3647 if (toplevel_bindings_p ())
3648 TREE_STATIC (decl) = 1;
3650 /* Tell `pushdecl' this is an initialized decl
3651 even though we don't yet have the initializer expression.
3652 Also tell `cp_finish_decl' it may store the real initializer. */
3653 DECL_INITIAL (decl) = error_mark_node;
3656 /* Set attributes here so if duplicate decl, will have proper attributes. */
3657 cplus_decl_attributes (&decl, attributes, 0);
3659 /* If #pragma weak was used, mark the decl weak now. */
3660 if (global_scope_p (current_binding_level))
3661 maybe_apply_pragma_weak (decl);
3663 if (TREE_CODE (decl) == FUNCTION_DECL
3664 && DECL_DECLARED_INLINE_P (decl)
3665 && DECL_UNINLINABLE (decl)
3666 && lookup_attribute ("noinline", DECL_ATTRIBUTES (decl)))
3667 warning ("%Jinline function '%D' given attribute noinline", decl, decl);
3669 if (context && COMPLETE_TYPE_P (complete_type (context)))
3671 push_nested_class (context);
3673 if (TREE_CODE (decl) == VAR_DECL)
3675 tree field = lookup_field (context, DECL_NAME (decl), 0, false);
3676 if (field == NULL_TREE || TREE_CODE (field) != VAR_DECL)
3677 error ("`%#D' is not a static member of `%#T'", decl, context);
3680 if (DECL_CONTEXT (field) != context)
3682 if (!same_type_p (DECL_CONTEXT (field), context))
3683 pedwarn ("ISO C++ does not permit `%T::%D' to be defined as `%T::%D'",
3684 DECL_CONTEXT (field), DECL_NAME (decl),
3685 context, DECL_NAME (decl));
3686 DECL_CONTEXT (decl) = DECL_CONTEXT (field);
3688 /* Static data member are tricky; an in-class initialization
3689 still doesn't provide a definition, so the in-class
3690 declaration will have DECL_EXTERNAL set, but will have an
3691 initialization. Thus, duplicate_decls won't warn
3692 about this situation, and so we check here. */
3693 if (DECL_INITIAL (decl) && DECL_INITIAL (field))
3694 error ("duplicate initialization of %D", decl);
3695 if (duplicate_decls (decl, field))
3701 tree field = check_classfn (context, decl,
3702 (processing_template_decl
3703 > template_class_depth (context))
3704 ? current_template_parms
3706 if (field && duplicate_decls (decl, field))
3710 /* cp_finish_decl sets DECL_EXTERNAL if DECL_IN_AGGR_P is set. */
3711 DECL_IN_AGGR_P (decl) = 0;
3712 if ((DECL_LANG_SPECIFIC (decl) && DECL_USE_TEMPLATE (decl))
3713 || CLASSTYPE_TEMPLATE_INSTANTIATION (context))
3715 SET_DECL_TEMPLATE_SPECIALIZATION (decl);
3716 /* [temp.expl.spec] An explicit specialization of a static data
3717 member of a template is a definition if the declaration
3718 includes an initializer; otherwise, it is a declaration.
3720 We check for processing_specialization so this only applies
3721 to the new specialization syntax. */
3722 if (DECL_INITIAL (decl) == NULL_TREE && processing_specialization)
3723 DECL_EXTERNAL (decl) = 1;
3726 if (DECL_EXTERNAL (decl) && ! DECL_TEMPLATE_SPECIALIZATION (decl))
3727 pedwarn ("declaration of `%#D' outside of class is not definition",
3731 /* Enter this declaration into the symbol table. */
3732 tem = maybe_push_decl (decl);
3734 if (processing_template_decl)
3735 tem = push_template_decl (tem);
3736 if (tem == error_mark_node)
3737 return error_mark_node;
3739 #if ! defined (ASM_OUTPUT_BSS) && ! defined (ASM_OUTPUT_ALIGNED_BSS)
3740 /* Tell the back-end to use or not use .common as appropriate. If we say
3741 -fconserve-space, we want this to save .data space, at the expense of
3742 wrong semantics. If we say -fno-conserve-space, we want this to
3743 produce errors about redefs; to do this we force variables into the
3745 DECL_COMMON (tem) = ((TREE_CODE (tem) != VAR_DECL
3746 || !DECL_THREAD_LOCAL (tem))
3747 && (flag_conserve_space || ! TREE_PUBLIC (tem)));
3750 if (! processing_template_decl)
3757 start_decl_1 (tree decl)
3759 tree type = TREE_TYPE (decl);
3760 int initialized = (DECL_INITIAL (decl) != NULL_TREE);
3762 if (type == error_mark_node)
3766 /* Is it valid for this decl to have an initializer at all?
3767 If not, set INITIALIZED to zero, which will indirectly
3768 tell `cp_finish_decl' to ignore the initializer once it is parsed. */
3770 /* Don't allow initializations for incomplete types except for
3771 arrays which might be completed by the initialization. */
3772 if (COMPLETE_TYPE_P (complete_type (type)))
3773 ; /* A complete type is ok. */
3774 else if (TREE_CODE (type) != ARRAY_TYPE)
3776 error ("variable `%#D' has initializer but incomplete type",
3779 type = TREE_TYPE (decl) = error_mark_node;
3781 else if (!COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
3783 if (DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl))
3784 error ("elements of array `%#D' have incomplete type", decl);
3785 /* else we already gave an error in start_decl. */
3791 && TREE_CODE (decl) != TYPE_DECL
3792 && TREE_CODE (decl) != TEMPLATE_DECL
3793 && type != error_mark_node
3794 && IS_AGGR_TYPE (type)
3795 && ! DECL_EXTERNAL (decl))
3797 if ((! processing_template_decl || ! uses_template_parms (type))
3798 && !COMPLETE_TYPE_P (complete_type (type)))
3800 error ("aggregate `%#D' has incomplete type and cannot be defined",
3802 /* Change the type so that assemble_variable will give
3803 DECL an rtl we can live with: (mem (const_int 0)). */
3804 type = TREE_TYPE (decl) = error_mark_node;
3808 /* If any base type in the hierarchy of TYPE needs a constructor,
3809 then we set initialized to 1. This way any nodes which are
3810 created for the purposes of initializing this aggregate
3811 will live as long as it does. This is necessary for global
3812 aggregates which do not have their initializers processed until
3813 the end of the file. */
3814 initialized = TYPE_NEEDS_CONSTRUCTING (type);
3819 DECL_INITIAL (decl) = NULL_TREE;
3821 /* Create a new scope to hold this declaration if necessary.
3822 Whether or not a new scope is necessary cannot be determined
3823 until after the type has been completed; if the type is a
3824 specialization of a class template it is not until after
3825 instantiation has occurred that TYPE_HAS_NONTRIVIAL_DESTRUCTOR
3826 will be set correctly. */
3827 maybe_push_cleanup_level (type);
3830 /* Handle initialization of references. DECL, TYPE, and INIT have the
3831 same meaning as in cp_finish_decl. *CLEANUP must be NULL on entry,
3832 but will be set to a new CLEANUP_STMT if a temporary is created
3833 that must be destroyed subsequently.
3835 Returns an initializer expression to use to initialize DECL, or
3836 NULL if the initialization can be performed statically.
3838 Quotes on semantics can be found in ARM 8.4.3. */
3841 grok_reference_init (tree decl, tree type, tree init, tree *cleanup)
3845 if (init == NULL_TREE)
3847 if ((DECL_LANG_SPECIFIC (decl) == 0
3848 || DECL_IN_AGGR_P (decl) == 0)
3849 && ! DECL_THIS_EXTERN (decl))
3850 error ("`%D' declared as reference but not initialized", decl);
3854 if (TREE_CODE (init) == CONSTRUCTOR)
3856 error ("ISO C++ forbids use of initializer list to initialize reference `%D'", decl);
3860 if (TREE_CODE (init) == TREE_LIST)
3861 init = build_x_compound_expr_from_list (init, "initializer");
3863 if (TREE_CODE (TREE_TYPE (init)) == REFERENCE_TYPE)
3864 init = convert_from_reference (init);
3866 if (TREE_CODE (TREE_TYPE (type)) != ARRAY_TYPE
3867 && TREE_CODE (TREE_TYPE (init)) == ARRAY_TYPE)
3868 /* Note: default conversion is only called in very special cases. */
3869 init = decay_conversion (init);
3871 /* Convert INIT to the reference type TYPE. This may involve the
3872 creation of a temporary, whose lifetime must be the same as that
3873 of the reference. If so, a DECL_EXPR for the temporary will be
3874 added just after the DECL_EXPR for DECL. That's why we don't set
3875 DECL_INITIAL for local references (instead assigning to them
3876 explicitly); we need to allow the temporary to be initialized
3878 tmp = initialize_reference (type, init, decl, cleanup);
3880 if (tmp == error_mark_node)
3882 else if (tmp == NULL_TREE)
3884 error ("cannot initialize `%T' from `%T'", type, TREE_TYPE (init));
3888 if (TREE_STATIC (decl) && !TREE_CONSTANT (tmp))
3891 DECL_INITIAL (decl) = tmp;
3896 /* When parsing `int a[] = {1, 2};' we don't know the size of the
3897 array until we finish parsing the initializer. If that's the
3898 situation we're in, update DECL accordingly. */
3901 maybe_deduce_size_from_array_init (tree decl, tree init)
3903 tree type = TREE_TYPE (decl);
3905 if (TREE_CODE (type) == ARRAY_TYPE
3906 && TYPE_DOMAIN (type) == NULL_TREE
3907 && TREE_CODE (decl) != TYPE_DECL)
3909 /* do_default is really a C-ism to deal with tentative definitions.
3910 But let's leave it here to ease the eventual merge. */
3911 int do_default = !DECL_EXTERNAL (decl);
3912 tree initializer = init ? init : DECL_INITIAL (decl);
3913 int failure = complete_array_type (type, initializer, do_default);
3916 error ("initializer fails to determine size of `%D'", decl);
3921 error ("array size missing in `%D'", decl);
3922 /* If a `static' var's size isn't known, make it extern as
3923 well as static, so it does not get allocated. If it's not
3924 `static', then don't mark it extern; finish_incomplete_decl
3925 will give it a default size and it will get allocated. */
3926 else if (!pedantic && TREE_STATIC (decl) && !TREE_PUBLIC (decl))
3927 DECL_EXTERNAL (decl) = 1;
3930 if (pedantic && TYPE_DOMAIN (type) != NULL_TREE
3931 && tree_int_cst_lt (TYPE_MAX_VALUE (TYPE_DOMAIN (type)),
3933 error ("zero-size array `%D'", decl);
3935 layout_decl (decl, 0);
3939 /* Set DECL_SIZE, DECL_ALIGN, etc. for DECL (a VAR_DECL), and issue
3940 any appropriate error messages regarding the layout. */
3943 layout_var_decl (tree decl)
3945 tree type = TREE_TYPE (decl);
3947 tree ttype = target_type (type);
3950 /* If we haven't already layed out this declaration, do so now.
3951 Note that we must not call complete type for an external object
3952 because it's type might involve templates that we are not
3953 supposed to instantiate yet. (And it's perfectly valid to say
3954 `extern X x' for some incomplete type `X'.) */
3955 if (!DECL_EXTERNAL (decl))
3956 complete_type (type);
3957 if (!DECL_SIZE (decl)
3958 && TREE_TYPE (decl) != error_mark_node
3959 && (COMPLETE_TYPE_P (type)
3960 || (TREE_CODE (type) == ARRAY_TYPE
3961 && !TYPE_DOMAIN (type)
3962 && COMPLETE_TYPE_P (TREE_TYPE (type)))))
3963 layout_decl (decl, 0);
3965 if (!DECL_EXTERNAL (decl) && DECL_SIZE (decl) == NULL_TREE)
3967 /* An automatic variable with an incomplete type: that is an error.
3968 Don't talk about array types here, since we took care of that
3969 message in grokdeclarator. */
3970 error ("storage size of `%D' isn't known", decl);
3971 TREE_TYPE (decl) = error_mark_node;
3974 /* Keep this code around in case we later want to control debug info
3975 based on whether a type is "used". (jason 1999-11-11) */
3977 else if (!DECL_EXTERNAL (decl) && IS_AGGR_TYPE (ttype))
3978 /* Let debugger know it should output info for this type. */
3979 note_debug_info_needed (ttype);
3981 if (TREE_STATIC (decl) && DECL_CLASS_SCOPE_P (decl))
3982 note_debug_info_needed (DECL_CONTEXT (decl));
3985 if ((DECL_EXTERNAL (decl) || TREE_STATIC (decl))
3986 && DECL_SIZE (decl) != NULL_TREE
3987 && ! TREE_CONSTANT (DECL_SIZE (decl)))
3989 if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
3990 constant_expression_warning (DECL_SIZE (decl));
3992 error ("storage size of `%D' isn't constant", decl);
3995 if (TREE_STATIC (decl)
3996 && !DECL_ARTIFICIAL (decl)
3997 && current_function_decl
3998 && DECL_CONTEXT (decl) == current_function_decl)
3999 push_local_name (decl);
4002 /* If a local static variable is declared in an inline function, or if
4003 we have a weak definition, we must endeavor to create only one
4004 instance of the variable at link-time. */
4007 maybe_commonize_var (tree decl)
4009 /* Static data in a function with comdat linkage also has comdat
4011 if (TREE_STATIC (decl)
4012 /* Don't mess with __FUNCTION__. */
4013 && ! DECL_ARTIFICIAL (decl)
4014 && DECL_FUNCTION_SCOPE_P (decl)
4015 /* Unfortunately, import_export_decl has not always been called
4016 before the function is processed, so we cannot simply check
4018 && (DECL_COMDAT (DECL_CONTEXT (decl))
4019 || ((DECL_DECLARED_INLINE_P (DECL_CONTEXT (decl))
4020 || DECL_TEMPLATE_INSTANTIATION (DECL_CONTEXT (decl)))
4021 && TREE_PUBLIC (DECL_CONTEXT (decl)))))
4025 /* With weak symbols, we simply make the variable COMDAT;
4026 that will cause copies in multiple translations units to
4028 comdat_linkage (decl);
4032 if (DECL_INITIAL (decl) == NULL_TREE
4033 || DECL_INITIAL (decl) == error_mark_node)
4035 /* Without weak symbols, we can use COMMON to merge
4036 uninitialized variables. */
4037 TREE_PUBLIC (decl) = 1;
4038 DECL_COMMON (decl) = 1;
4042 /* While for initialized variables, we must use internal
4043 linkage -- which means that multiple copies will not
4045 TREE_PUBLIC (decl) = 0;
4046 DECL_COMMON (decl) = 0;
4047 cp_warning_at ("sorry: semantics of inline function static data `%#D' are wrong (you'll wind up with multiple copies)", decl);
4048 warning ("%J you can work around this by removing the initializer",
4053 else if (DECL_LANG_SPECIFIC (decl) && DECL_COMDAT (decl))
4054 /* Set it up again; we might have set DECL_INITIAL since the last
4056 comdat_linkage (decl);
4059 /* Issue an error message if DECL is an uninitialized const variable. */
4062 check_for_uninitialized_const_var (tree decl)
4064 tree type = TREE_TYPE (decl);
4066 /* ``Unless explicitly declared extern, a const object does not have
4067 external linkage and must be initialized. ($8.4; $12.1)'' ARM
4069 if (TREE_CODE (decl) == VAR_DECL
4070 && TREE_CODE (type) != REFERENCE_TYPE
4071 && CP_TYPE_CONST_P (type)
4072 && !TYPE_NEEDS_CONSTRUCTING (type)
4073 && !DECL_INITIAL (decl))
4074 error ("uninitialized const `%D'", decl);
4077 /* FIELD is a FIELD_DECL or NULL. In the former case, the value
4078 returned is the next FIELD_DECL (possibly FIELD itself) that can be
4079 initialized. If there are no more such fields, the return value
4083 next_initializable_field (tree field)
4086 && (TREE_CODE (field) != FIELD_DECL
4087 || (DECL_C_BIT_FIELD (field) && !DECL_NAME (field))
4088 || DECL_ARTIFICIAL (field)))
4089 field = TREE_CHAIN (field);
4094 /* Undo the brace-elision allowed by [dcl.init.aggr] in a
4095 brace-enclosed aggregate initializer.
4097 *INITP is one of a list of initializers describing a brace-enclosed
4098 initializer for an entity of the indicated aggregate TYPE. It may
4099 not presently match the shape of the TYPE; for example:
4101 struct S { int a; int b; };
4102 struct S a[] = { 1, 2, 3, 4 };
4104 Here *INITP will point to TREE_LIST of four elements, rather than a
4105 list of two elements, each itself a list of two elements. This
4106 routine transforms INIT from the former form into the latter. The
4107 revised initializer is returned. */
4110 reshape_init (tree type, tree *initp)
4114 tree old_init_value;
4116 bool brace_enclosed_p;
4119 old_init_value = (TREE_CODE (*initp) == TREE_LIST
4120 ? TREE_VALUE (*initp) : old_init);
4122 my_friendly_assert (old_init_value, 20030723);
4124 /* If the initializer is brace-enclosed, pull initializers from the
4125 enclosed elements. Advance past the brace-enclosed initializer
4127 if (TREE_CODE (old_init_value) == CONSTRUCTOR
4128 && BRACE_ENCLOSED_INITIALIZER_P (old_init_value))
4130 *initp = TREE_CHAIN (old_init);
4131 TREE_CHAIN (old_init) = NULL_TREE;
4132 inits = CONSTRUCTOR_ELTS (old_init_value);
4134 brace_enclosed_p = true;
4139 brace_enclosed_p = false;
4142 /* A non-aggregate type is always initialized with a single
4144 if (!CP_AGGREGATE_TYPE_P (type))
4146 *initp = TREE_CHAIN (old_init);
4147 TREE_CHAIN (old_init) = NULL_TREE;
4148 /* It is invalid to initialize a non-aggregate type with a
4149 brace-enclosed initializer. */
4150 if (brace_enclosed_p)
4152 error ("brace-enclosed initializer used to initialize `%T'",
4154 if (TREE_CODE (old_init) == TREE_LIST)
4155 TREE_VALUE (old_init) = error_mark_node;
4157 old_init = error_mark_node;
4165 All implicit type conversions (clause _conv_) are considered when
4166 initializing the aggregate member with an initializer from an
4167 initializer-list. If the initializer can initialize a member,
4168 the member is initialized. Otherwise, if the member is itself a
4169 non-empty subaggregate, brace elision is assumed and the
4170 initializer is considered for the initialization of the first
4171 member of the subaggregate. */
4172 if (!brace_enclosed_p
4173 && can_convert_arg (type, TREE_TYPE (old_init_value), old_init_value))
4175 *initp = TREE_CHAIN (old_init);
4176 TREE_CHAIN (old_init) = NULL_TREE;
4180 if (TREE_CODE (old_init_value) == STRING_CST
4181 && TREE_CODE (type) == ARRAY_TYPE
4182 && char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type))))
4184 /* [dcl.init.string]
4186 A char array (whether plain char, signed char, or unsigned char)
4187 can be initialized by a string-literal (optionally enclosed in
4188 braces); a wchar_t array can be initialized by a wide
4189 string-literal (optionally enclosed in braces). */
4190 new_init = old_init;
4191 /* Move past the initializer. */
4192 *initp = TREE_CHAIN (old_init);
4193 TREE_CHAIN (old_init) = NULL_TREE;
4197 /* Build a CONSTRUCTOR to hold the contents of the aggregate. */
4198 new_init = build_constructor (NULL_TREE, NULL_TREE);
4200 if (CLASS_TYPE_P (type))
4204 field = next_initializable_field (TYPE_FIELDS (type));
4210 An initializer for an aggregate member that is an
4211 empty class shall have the form of an empty
4212 initializer-list {}. */
4213 if (!brace_enclosed_p)
4215 error ("initializer for `%T' must be brace-enclosed",
4217 return error_mark_node;
4222 /* Loop through the initializable fields, gathering
4228 /* Handle designated initializers, as an extension. */
4229 if (TREE_PURPOSE (*initp))
4232 pedwarn ("ISO C++ does not allow designated initializers");
4233 field = lookup_field_1 (type, TREE_PURPOSE (*initp),
4234 /*want_type=*/false);
4235 if (!field || TREE_CODE (field) != FIELD_DECL)
4236 error ("`%T' has no non-static data member named `%D'",
4237 type, TREE_PURPOSE (*initp));
4242 field_init = reshape_init (TREE_TYPE (field), initp);
4243 if (field_init == error_mark_node)
4244 return error_mark_node;
4245 TREE_CHAIN (field_init) = CONSTRUCTOR_ELTS (new_init);
4246 CONSTRUCTOR_ELTS (new_init) = field_init;
4249 When a union is initialized with a brace-enclosed
4250 initializer, the braces shall only contain an
4251 initializer for the first member of the union. */
4252 if (TREE_CODE (type) == UNION_TYPE)
4254 field = next_initializable_field (TREE_CHAIN (field));
4258 else if (TREE_CODE (type) == ARRAY_TYPE
4259 || TREE_CODE (type) == VECTOR_TYPE)
4264 /* If the bound of the array is known, take no more initializers
4265 than are allowed. */
4266 max_index = NULL_TREE;
4267 if (TREE_CODE (type) == ARRAY_TYPE)
4269 if (TYPE_DOMAIN (type))
4270 max_index = array_type_nelts (type);
4274 /* For a vector, the representation type is a struct
4275 containing a single member which is an array of the
4276 appropriate size. */
4277 tree rtype = TYPE_DEBUG_REPRESENTATION_TYPE (type);
4278 if (rtype && TYPE_DOMAIN (TREE_TYPE (TYPE_FIELDS (rtype))))
4279 max_index = array_type_nelts (TREE_TYPE (TYPE_FIELDS (rtype)));
4282 /* Loop through the array elements, gathering initializers. */
4283 for (index = size_zero_node;
4284 *initp && (!max_index || !tree_int_cst_lt (max_index, index));
4285 index = size_binop (PLUS_EXPR, index, size_one_node))
4289 element_init = reshape_init (TREE_TYPE (type), initp);
4290 if (element_init == error_mark_node)
4291 return error_mark_node;
4292 TREE_CHAIN (element_init) = CONSTRUCTOR_ELTS (new_init);
4293 CONSTRUCTOR_ELTS (new_init) = element_init;
4294 if (TREE_PURPOSE (element_init))
4296 tree next_index = TREE_PURPOSE (element_init);
4297 if (TREE_CODE (next_index) == IDENTIFIER_NODE)
4299 error ("name `%D' used in a GNU-style designated "
4300 "initializer for an array", next_index);
4301 TREE_PURPOSE (element_init) = NULL_TREE;
4311 /* The initializers were placed in reverse order in the
4313 CONSTRUCTOR_ELTS (new_init) = nreverse (CONSTRUCTOR_ELTS (new_init));
4315 if (TREE_CODE (old_init) == TREE_LIST)
4316 new_init = build_tree_list (TREE_PURPOSE (old_init), new_init);
4319 /* If this was a brace-enclosed initializer and all of the
4320 initializers were not used up, there is a problem. */
4321 if (brace_enclosed_p && *initp)
4322 error ("too many initializers for `%T'", type);
4327 /* Verify INIT (the initializer for DECL), and record the
4328 initialization in DECL_INITIAL, if appropriate. CLEANUP is as for
4329 grok_reference_init.
4331 If the return value is non-NULL, it is an expression that must be
4332 evaluated dynamically to initialize DECL. */
4335 check_initializer (tree decl, tree init, int flags, tree *cleanup)
4337 tree type = TREE_TYPE (decl);
4338 tree init_code = NULL;
4340 /* If `start_decl' didn't like having an initialization, ignore it now. */
4341 if (init != NULL_TREE && DECL_INITIAL (decl) == NULL_TREE)
4344 /* If an initializer is present, DECL_INITIAL has been
4345 error_mark_node, to indicate that an as-of-yet unevaluated
4346 initialization will occur. From now on, DECL_INITIAL reflects
4347 the static initialization -- if any -- of DECL. */
4348 DECL_INITIAL (decl) = NULL_TREE;
4350 /* Things that are going to be initialized need to have complete
4352 TREE_TYPE (decl) = type = complete_type (TREE_TYPE (decl));
4354 if (type == error_mark_node)
4355 /* We will have already complained. */
4357 else if (init && COMPLETE_TYPE_P (type)
4358 && !TREE_CONSTANT (TYPE_SIZE (type)))
4360 error ("variable-sized object `%D' may not be initialized", decl);
4363 else if (TREE_CODE (type) == ARRAY_TYPE
4364 && !COMPLETE_TYPE_P (complete_type (TREE_TYPE (type))))
4366 error ("elements of array `%#D' have incomplete type", decl);
4369 else if (TREE_CODE (type) != ARRAY_TYPE && !COMPLETE_TYPE_P (type))
4371 error ("`%D' has incomplete type", decl);
4372 TREE_TYPE (decl) = error_mark_node;
4376 if (TREE_CODE (decl) == CONST_DECL)
4378 my_friendly_assert (TREE_CODE (decl) != REFERENCE_TYPE, 148);
4380 DECL_INITIAL (decl) = init;
4382 my_friendly_assert (init != NULL_TREE, 149);
4385 else if (!DECL_EXTERNAL (decl) && TREE_CODE (type) == REFERENCE_TYPE)
4386 init = grok_reference_init (decl, type, init, cleanup);
4389 if (TREE_CODE (init) == CONSTRUCTOR
4390 && BRACE_ENCLOSED_INITIALIZER_P (init))
4392 /* [dcl.init] paragraph 13,
4393 If T is a scalar type, then a declaration of the form
4398 reshape_init will complain about the extra braces,
4399 and doesn't do anything useful in the case where TYPE is
4400 scalar, so just don't call it. */
4401 if (CP_AGGREGATE_TYPE_P (type))
4402 init = reshape_init (type, &init);
4404 if ((*targetm.vector_opaque_p) (type))
4406 error ("opaque vector types cannot be initialized");
4407 init = error_mark_node;
4411 /* If DECL has an array type without a specific bound, deduce the
4412 array size from the initializer. */
4413 maybe_deduce_size_from_array_init (decl, init);
4414 type = TREE_TYPE (decl);
4416 if (TYPE_HAS_CONSTRUCTOR (type) || TYPE_NEEDS_CONSTRUCTING (type))
4418 if (TREE_CODE (type) == ARRAY_TYPE)
4419 goto initialize_aggr;
4420 else if (TREE_CODE (init) == CONSTRUCTOR
4421 && BRACE_ENCLOSED_INITIALIZER_P (init))
4423 if (TYPE_NON_AGGREGATE_CLASS (type))
4425 error ("`%D' must be initialized by constructor, not by `{...}'",
4427 init = error_mark_node;
4430 goto dont_use_constructor;
4434 int saved_stmts_are_full_exprs_p;
4437 saved_stmts_are_full_exprs_p = 0;
4438 if (building_stmt_tree ())
4440 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4441 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4443 init = build_aggr_init (decl, init, flags);
4444 if (building_stmt_tree ())
4445 current_stmt_tree ()->stmts_are_full_exprs_p =
4446 saved_stmts_are_full_exprs_p;
4452 dont_use_constructor:
4453 if (TREE_CODE (init) != TREE_VEC)
4455 init_code = store_init_value (decl, init);
4460 else if (DECL_EXTERNAL (decl))
4462 else if (TYPE_P (type) && TYPE_NEEDS_CONSTRUCTING (type))
4463 goto initialize_aggr;
4464 else if (IS_AGGR_TYPE (type))
4466 tree core_type = strip_array_types (type);
4468 if (CLASSTYPE_READONLY_FIELDS_NEED_INIT (core_type))
4469 error ("structure `%D' with uninitialized const members", decl);
4470 if (CLASSTYPE_REF_FIELDS_NEED_INIT (core_type))
4471 error ("structure `%D' with uninitialized reference members",
4474 check_for_uninitialized_const_var (decl);
4477 check_for_uninitialized_const_var (decl);
4479 if (init && init != error_mark_node)
4480 init_code = build (INIT_EXPR, type, decl, init);
4485 /* If DECL is not a local variable, give it RTL. */
4488 make_rtl_for_nonlocal_decl (tree decl, tree init, const char* asmspec)
4490 int toplev = toplevel_bindings_p ();
4493 /* Handle non-variables up front. */
4494 if (TREE_CODE (decl) != VAR_DECL)
4496 rest_of_decl_compilation (decl, asmspec, toplev, at_eof);
4500 /* If we see a class member here, it should be a static data
4502 if (DECL_LANG_SPECIFIC (decl) && DECL_IN_AGGR_P (decl))
4504 my_friendly_assert (TREE_STATIC (decl), 19990828);
4505 /* An in-class declaration of a static data member should be
4506 external; it is only a declaration, and not a definition. */
4507 if (init == NULL_TREE)
4508 my_friendly_assert (DECL_EXTERNAL (decl), 20000723);
4511 /* Set the DECL_ASSEMBLER_NAME for the variable. */
4514 change_decl_assembler_name (decl, get_identifier (asmspec));
4515 /* The `register' keyword, when used together with an
4516 asm-specification, indicates that the variable should be
4517 placed in a particular register. */
4518 if (DECL_REGISTER (decl))
4519 DECL_HARD_REGISTER (decl) = 1;
4522 /* We don't create any RTL for local variables. */
4523 if (DECL_FUNCTION_SCOPE_P (decl) && !TREE_STATIC (decl))
4526 /* We defer emission of local statics until the corresponding
4527 DECL_EXPR is expanded. */
4528 defer_p = DECL_FUNCTION_SCOPE_P (decl) || DECL_VIRTUAL_P (decl);
4530 /* We try to defer namespace-scope static constants so that they are
4531 not emitted into the object file unnecessarily. */
4532 if (!DECL_VIRTUAL_P (decl)
4533 && TREE_READONLY (decl)
4534 && DECL_INITIAL (decl) != NULL_TREE
4535 && DECL_INITIAL (decl) != error_mark_node
4536 && ! EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl))
4538 && !TREE_PUBLIC (decl))
4540 /* Fool with the linkage of static consts according to #pragma
4542 if (!interface_unknown && !TREE_PUBLIC (decl))
4544 TREE_PUBLIC (decl) = 1;
4545 DECL_EXTERNAL (decl) = interface_only;
4550 /* Likewise for template instantiations. */
4551 else if (DECL_COMDAT (decl))
4554 /* If we're deferring the variable, we only need to make RTL if
4555 there's an ASMSPEC. Otherwise, we'll lazily create it later when
4556 we need it. (There's no way to lazily create RTL for things that
4557 have assembly specs because the information about the specifier
4558 isn't stored in the tree, yet) */
4559 if (defer_p && asmspec)
4560 make_decl_rtl (decl, asmspec);
4561 /* If we're not deferring, go ahead and assemble the variable. */
4563 rest_of_decl_compilation (decl, asmspec, toplev, at_eof);
4566 /* Generate code to initialize DECL (a local variable). */
4569 initialize_local_var (tree decl, tree init)
4571 tree type = TREE_TYPE (decl);
4574 my_friendly_assert (TREE_CODE (decl) == VAR_DECL
4575 || TREE_CODE (decl) == RESULT_DECL,
4577 my_friendly_assert (!TREE_STATIC (decl), 20021010);
4579 if (DECL_SIZE (decl) == NULL_TREE)
4581 /* If we used it already as memory, it must stay in memory. */
4582 DECL_INITIAL (decl) = NULL_TREE;
4583 TREE_ADDRESSABLE (decl) = TREE_USED (decl);
4586 if (DECL_SIZE (decl) && type != error_mark_node)
4590 /* Compute and store the initial value. */
4591 already_used = TREE_USED (decl) || TREE_USED (type);
4593 /* Perform the initialization. */
4596 int saved_stmts_are_full_exprs_p;
4598 my_friendly_assert (building_stmt_tree (), 20000906);
4599 saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
4600 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
4601 finish_expr_stmt (init);
4602 current_stmt_tree ()->stmts_are_full_exprs_p =
4603 saved_stmts_are_full_exprs_p;
4606 /* Set this to 0 so we can tell whether an aggregate which was
4607 initialized was ever used. Don't do this if it has a
4608 destructor, so we don't complain about the 'resource
4609 allocation is initialization' idiom. Now set
4610 attribute((unused)) on types so decls of that type will be
4611 marked used. (see TREE_USED, above.) */
4612 if (TYPE_NEEDS_CONSTRUCTING (type)
4614 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type)
4615 && DECL_NAME (decl))
4616 TREE_USED (decl) = 0;
4617 else if (already_used)
4618 TREE_USED (decl) = 1;
4621 /* Generate a cleanup, if necessary. */
4622 cleanup = cxx_maybe_build_cleanup (decl);
4623 if (DECL_SIZE (decl) && cleanup)
4624 finish_decl_cleanup (decl, cleanup);
4627 /* Finish processing of a declaration;
4628 install its line number and initial value.
4629 If the length of an array type is not known before,
4630 it must be determined now, from the initial value, or it is an error.
4632 INIT holds the value of an initializer that should be allowed to escape
4635 FLAGS is LOOKUP_ONLYCONVERTING if the = init syntax was used, else 0
4636 if the (init) syntax was used. */
4639 cp_finish_decl (tree decl, tree init, tree asmspec_tree, int flags)
4642 tree ttype = NULL_TREE;
4644 const char *asmspec = NULL;
4645 int was_readonly = 0;
4647 if (decl == error_mark_node)
4652 error ("assignment (not initialization) in declaration");
4656 my_friendly_assert (TREE_CODE (decl) != RESULT_DECL, 20030619);
4658 /* Assume no cleanup is required. */
4659 cleanup = NULL_TREE;
4661 /* If a name was specified, get the string. */
4662 if (global_scope_p (current_binding_level))
4663 asmspec_tree = maybe_apply_renaming_pragma (decl, asmspec_tree);
4665 asmspec = TREE_STRING_POINTER (asmspec_tree);
4667 if (init && TREE_CODE (init) == NAMESPACE_DECL)
4669 error ("cannot initialize `%D' to namespace `%D'",
4674 if (current_class_type
4675 && CP_DECL_CONTEXT (decl) == current_class_type
4676 && TYPE_BEING_DEFINED (current_class_type)
4677 && (DECL_INITIAL (decl) || init))
4678 DECL_INITIALIZED_IN_CLASS_P (decl) = 1;
4680 if (TREE_CODE (decl) == VAR_DECL
4681 && DECL_CONTEXT (decl)
4682 && TREE_CODE (DECL_CONTEXT (decl)) == NAMESPACE_DECL
4683 && DECL_CONTEXT (decl) != current_namespace
4686 /* Leave the namespace of the object. */
4687 pop_decl_namespace ();
4690 type = TREE_TYPE (decl);
4692 if (type == error_mark_node)
4695 if (TYPE_HAS_MUTABLE_P (type))
4696 TREE_READONLY (decl) = 0;
4698 if (processing_template_decl)
4700 /* Add this declaration to the statement-tree. */
4701 if (at_function_scope_p ())
4702 add_decl_expr (decl);
4704 if (init && DECL_INITIAL (decl))
4705 DECL_INITIAL (decl) = init;
4706 if (TREE_CODE (decl) == VAR_DECL
4707 && !DECL_PRETTY_FUNCTION_P (decl)
4708 && !dependent_type_p (TREE_TYPE (decl)))
4709 maybe_deduce_size_from_array_init (decl, init);
4713 /* Parameters are handled by store_parm_decls, not cp_finish_decl. */
4714 my_friendly_assert (TREE_CODE (decl) != PARM_DECL, 19990828);
4716 /* Take care of TYPE_DECLs up front. */
4717 if (TREE_CODE (decl) == TYPE_DECL)
4719 if (type != error_mark_node
4720 && IS_AGGR_TYPE (type) && DECL_NAME (decl))
4722 if (TREE_TYPE (DECL_NAME (decl)) && TREE_TYPE (decl) != type)
4723 warning ("shadowing previous type declaration of `%#D'", decl);
4724 set_identifier_type_value (DECL_NAME (decl), decl);
4727 /* If we have installed this as the canonical typedef for this
4728 type, and that type has not been defined yet, delay emitting
4729 the debug information for it, as we will emit it later. */
4730 if (TYPE_MAIN_DECL (TREE_TYPE (decl)) == decl
4731 && !COMPLETE_TYPE_P (TREE_TYPE (decl)))
4732 TYPE_DECL_SUPPRESS_DEBUG (decl) = 1;
4734 rest_of_decl_compilation (decl, NULL,
4735 DECL_CONTEXT (decl) == NULL_TREE, at_eof);
4739 if (TREE_CODE (decl) != FUNCTION_DECL)
4740 ttype = target_type (type);
4743 /* Currently, GNU C++ puts constants in text space, making them
4744 impossible to initialize. In the future, one would hope for
4745 an operating system which understood the difference between
4746 initialization and the running of a program. */
4747 if (! DECL_EXTERNAL (decl) && TREE_READONLY (decl))
4750 if (TYPE_NEEDS_CONSTRUCTING (type)
4751 || TREE_CODE (type) == REFERENCE_TYPE)
4752 TREE_READONLY (decl) = 0;
4755 if (TREE_CODE (decl) == VAR_DECL)
4757 /* Only PODs can have thread-local storage. Other types may require
4758 various kinds of non-trivial initialization. */
4759 if (DECL_THREAD_LOCAL (decl) && !pod_type_p (TREE_TYPE (decl)))
4760 error ("`%D' cannot be thread-local because it has non-POD type `%T'",
4761 decl, TREE_TYPE (decl));
4762 /* Convert the initializer to the type of DECL, if we have not
4763 already initialized DECL. */
4764 if (!DECL_INITIALIZED_P (decl)
4765 /* If !DECL_EXTERNAL then DECL is being defined. In the
4766 case of a static data member initialized inside the
4767 class-specifier, there can be an initializer even if DECL
4768 is *not* defined. */
4769 && (!DECL_EXTERNAL (decl) || init))
4771 init = check_initializer (decl, init, flags, &cleanup);
4772 /* Thread-local storage cannot be dynamically initialized. */
4773 if (DECL_THREAD_LOCAL (decl) && init)
4775 error ("`%D' is thread-local and so cannot be dynamically "
4776 "initialized", decl);
4783 The memory occupied by any object of static storage
4784 duration is zero-initialized at program startup before
4785 any other initialization takes place.
4787 We cannot create an appropriate initializer until after
4788 the type of DECL is finalized. If DECL_INITIAL is set,
4789 then the DECL is statically initialized, and any
4790 necessary zero-initialization has already been performed. */
4791 if (TREE_STATIC (decl) && !DECL_INITIAL (decl))
4792 DECL_INITIAL (decl) = build_zero_init (TREE_TYPE (decl),
4793 /*nelts=*/NULL_TREE,
4794 /*static_storage_p=*/true);
4795 /* Remember that the initialization for this variable has
4797 DECL_INITIALIZED_P (decl) = 1;
4799 /* If the variable has an array type, lay out the type, even if
4800 there is no initializer. It is valid to index through the
4801 array, and we must get TYPE_ALIGN set correctly on the array
4803 else if (TREE_CODE (type) == ARRAY_TYPE)
4807 /* Add this declaration to the statement-tree. This needs to happen
4808 after the call to check_initializer so that the DECL_EXPR for a
4809 reference temp is added before the DECL_EXPR for the reference itself. */
4810 if (at_function_scope_p ())
4811 add_decl_expr (decl);
4813 if (TREE_CODE (decl) == VAR_DECL)
4814 layout_var_decl (decl);
4816 /* Output the assembler code and/or RTL code for variables and functions,
4817 unless the type is an undefined structure or union.
4818 If not, it will get done when the type is completed. */
4819 if (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == FUNCTION_DECL)
4821 if (TREE_CODE (decl) == VAR_DECL)
4822 maybe_commonize_var (decl);
4824 make_rtl_for_nonlocal_decl (decl, init, asmspec);
4826 /* Check for abstractness of the type. Notice that there is no
4827 need to strip array types here since the check for those types
4828 is already done within create_array_type_for_decl. */
4829 if (TREE_CODE (type) == FUNCTION_TYPE
4830 || TREE_CODE (type) == METHOD_TYPE)
4831 abstract_virtuals_error (decl, TREE_TYPE (type));
4833 abstract_virtuals_error (decl, type);
4835 if (TREE_CODE (decl) == FUNCTION_DECL
4836 || TREE_TYPE (decl) == error_mark_node)
4837 /* No initialization required. */
4839 else if (DECL_EXTERNAL (decl)
4840 && ! (DECL_LANG_SPECIFIC (decl)
4841 && DECL_NOT_REALLY_EXTERN (decl)))
4844 DECL_INITIAL (decl) = init;
4848 /* A variable definition. */
4849 if (DECL_FUNCTION_SCOPE_P (decl))
4851 /* Initialize the local variable. */
4852 if (processing_template_decl)
4854 if (init || DECL_INITIAL (decl) == error_mark_node)
4855 DECL_INITIAL (decl) = init;
4857 else if (!TREE_STATIC (decl))
4858 initialize_local_var (decl, init);
4861 if (TREE_STATIC (decl))
4862 expand_static_init (decl, init);
4866 /* Undo call to `pushclass' that was done in `start_decl'
4867 due to initialization of qualified member variable.
4868 I.e., Foo::x = 10; */
4870 tree context = CP_DECL_CONTEXT (decl);
4873 && (TREE_CODE (decl) == VAR_DECL
4874 /* We also have a pushclass done that we need to undo here
4875 if we're at top level and declare a method. */
4876 || TREE_CODE (decl) == FUNCTION_DECL)
4877 /* If size hasn't been set, we're still defining it,
4878 and therefore inside the class body; don't pop
4879 the binding level.. */
4880 && COMPLETE_TYPE_P (context)
4881 && context == current_class_type)
4882 pop_nested_class ();
4886 /* If a CLEANUP_STMT was created to destroy a temporary bound to a
4887 reference, insert it in the statement-tree now. */
4889 push_cleanup (decl, cleanup, false);
4894 TREE_READONLY (decl) = 1;
4896 /* If this was marked 'used', be sure it will be output. */
4897 if (lookup_attribute ("used", DECL_ATTRIBUTES (decl)))
4898 mark_decl_referenced (decl);
4901 /* This is here for a midend callback from c-common.c. */
4904 finish_decl (tree decl, tree init, tree asmspec_tree)
4906 cp_finish_decl (decl, init, asmspec_tree, 0);
4909 /* Returns a declaration for a VAR_DECL as if:
4911 extern "C" TYPE NAME;
4913 had been seen. Used to create compiler-generated global
4917 declare_global_var (tree name, tree type)
4921 push_to_top_level ();
4922 decl = build_decl (VAR_DECL, name, type);
4923 TREE_PUBLIC (decl) = 1;
4924 DECL_EXTERNAL (decl) = 1;
4925 DECL_ARTIFICIAL (decl) = 1;
4927 cp_finish_decl (decl, NULL_TREE, NULL_TREE, 0);
4928 pop_from_top_level ();
4933 /* Returns a pointer to the `atexit' function. Note that if
4934 FLAG_USE_CXA_ATEXIT is nonzero, then this will actually be the new
4935 `__cxa_atexit' function specified in the IA64 C++ ABI. */
4938 get_atexit_node (void)
4949 if (flag_use_cxa_atexit)
4951 /* The declaration for `__cxa_atexit' is:
4953 int __cxa_atexit (void (*)(void *), void *, void *)
4955 We build up the argument types and then then function type
4958 /* First, build the pointer-to-function type for the first
4960 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
4961 fn_type = build_function_type (void_type_node, arg_types);
4962 fn_ptr_type = build_pointer_type (fn_type);
4963 /* Then, build the rest of the argument types. */
4964 arg_types = tree_cons (NULL_TREE, ptr_type_node, void_list_node);
4965 arg_types = tree_cons (NULL_TREE, ptr_type_node, arg_types);
4966 arg_types = tree_cons (NULL_TREE, fn_ptr_type, arg_types);
4967 /* And the final __cxa_atexit type. */
4968 fn_type = build_function_type (integer_type_node, arg_types);
4969 fn_ptr_type = build_pointer_type (fn_type);
4970 name = "__cxa_atexit";
4974 /* The declaration for `atexit' is:
4976 int atexit (void (*)());
4978 We build up the argument types and then then function type
4980 fn_type = build_function_type (void_type_node, void_list_node);
4981 fn_ptr_type = build_pointer_type (fn_type);
4982 arg_types = tree_cons (NULL_TREE, fn_ptr_type, void_list_node);
4983 /* Build the final atexit type. */
4984 fn_type = build_function_type (integer_type_node, arg_types);
4988 /* Now, build the function declaration. */
4989 push_lang_context (lang_name_c);
4990 atexit_fndecl = build_library_fn_ptr (name, fn_type);
4991 mark_used (atexit_fndecl);
4992 pop_lang_context ();
4993 atexit_node = decay_conversion (atexit_fndecl);
4998 /* Returns the __dso_handle VAR_DECL. */
5001 get_dso_handle_node (void)
5003 if (dso_handle_node)
5004 return dso_handle_node;
5006 /* Declare the variable. */
5007 dso_handle_node = declare_global_var (get_identifier ("__dso_handle"),
5010 return dso_handle_node;
5013 /* Begin a new function with internal linkage whose job will be simply
5014 to destroy some particular variable. */
5016 static GTY(()) int start_cleanup_cnt;
5019 start_cleanup_fn (void)
5021 int old_interface_only = interface_only;
5022 int old_interface_unknown = interface_unknown;
5028 push_to_top_level ();
5030 /* No need to mangle this. */
5031 push_lang_context (lang_name_c);
5034 interface_unknown = 1;
5036 /* Build the parameter-types. */
5037 parmtypes = void_list_node;
5038 /* Functions passed to __cxa_atexit take an additional parameter.
5039 We'll just ignore it. After we implement the new calling
5040 convention for destructors, we can eliminate the use of
5041 additional cleanup functions entirely in the -fnew-abi case. */
5042 if (flag_use_cxa_atexit)
5043 parmtypes = tree_cons (NULL_TREE, ptr_type_node, parmtypes);
5044 /* Build the function type itself. */
5045 fntype = build_function_type (void_type_node, parmtypes);
5046 /* Build the name of the function. */
5047 sprintf (name, "__tcf_%d", start_cleanup_cnt++);
5048 /* Build the function declaration. */
5049 fndecl = build_lang_decl (FUNCTION_DECL, get_identifier (name), fntype);
5050 /* It's a function with internal linkage, generated by the
5052 TREE_PUBLIC (fndecl) = 0;
5053 DECL_ARTIFICIAL (fndecl) = 1;
5054 /* Make the function `inline' so that it is only emitted if it is
5055 actually needed. It is unlikely that it will be inlined, since
5056 it is only called via a function pointer, but we avoid unnecessary
5057 emissions this way. */
5058 DECL_INLINE (fndecl) = 1;
5059 DECL_DECLARED_INLINE_P (fndecl) = 1;
5060 DECL_INTERFACE_KNOWN (fndecl) = 1;
5061 /* Build the parameter. */
5062 if (flag_use_cxa_atexit)
5066 parmdecl = cp_build_parm_decl (NULL_TREE, ptr_type_node);
5067 DECL_CONTEXT (parmdecl) = fndecl;
5068 TREE_USED (parmdecl) = 1;
5069 DECL_ARGUMENTS (fndecl) = parmdecl;
5073 start_preparsed_function (fndecl, NULL_TREE, SF_PRE_PARSED);
5075 interface_unknown = old_interface_unknown;
5076 interface_only = old_interface_only;
5078 pop_lang_context ();
5080 return current_function_decl;
5083 /* Finish the cleanup function begun by start_cleanup_fn. */
5086 end_cleanup_fn (void)
5088 expand_or_defer_fn (finish_function (0));
5090 pop_from_top_level ();
5093 /* Generate code to handle the destruction of DECL, an object with
5094 static storage duration. */
5097 register_dtor_fn (tree decl)
5104 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5107 /* Call build_cleanup before we enter the anonymous function so that
5108 any access checks will be done relative to the current scope,
5109 rather than the scope of the anonymous function. */
5110 build_cleanup (decl);
5112 /* Now start the function. */
5113 cleanup = start_cleanup_fn ();
5115 /* Now, recompute the cleanup. It may contain SAVE_EXPRs that refer
5116 to the original function, rather than the anonymous one. That
5117 will make the back-end think that nested functions are in use,
5118 which causes confusion. */
5120 push_deferring_access_checks (dk_no_check);
5121 fcall = build_cleanup (decl);
5122 pop_deferring_access_checks ();
5124 /* Create the body of the anonymous function. */
5125 compound_stmt = begin_compound_stmt (BCS_FN_BODY);
5126 finish_expr_stmt (fcall);
5127 finish_compound_stmt (compound_stmt);
5130 /* Call atexit with the cleanup function. */
5131 cxx_mark_addressable (cleanup);
5132 mark_used (cleanup);
5133 cleanup = build_unary_op (ADDR_EXPR, cleanup, 0);
5134 if (flag_use_cxa_atexit)
5136 args = tree_cons (NULL_TREE,
5137 build_unary_op (ADDR_EXPR, get_dso_handle_node (), 0),
5139 args = tree_cons (NULL_TREE, null_pointer_node, args);
5140 args = tree_cons (NULL_TREE, cleanup, args);
5143 args = tree_cons (NULL_TREE, cleanup, NULL_TREE);
5144 finish_expr_stmt (build_function_call (get_atexit_node (), args));
5147 /* DECL is a VAR_DECL with static storage duration. INIT, if present,
5148 is its initializer. Generate code to handle the construction
5149 and destruction of DECL. */
5152 expand_static_init (tree decl, tree init)
5154 my_friendly_assert (TREE_CODE (decl) == VAR_DECL, 20021010);
5155 my_friendly_assert (TREE_STATIC (decl), 20021010);
5157 /* Some variables require no initialization. */
5159 && !TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl))
5160 && TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
5163 if (! toplevel_bindings_p ())
5165 /* Emit code to perform this initialization but once. */
5172 /* Emit code to perform this initialization but once. This code
5175 static int guard = 0;
5177 // Do initialization.
5179 // Register variable for destruction at end of program.
5182 Note that the `temp' variable is only set to 1 *after* the
5183 initialization is complete. This ensures that an exception,
5184 thrown during the construction, will cause the variable to
5185 reinitialized when we pass through this code again, as per:
5189 If the initialization exits by throwing an exception, the
5190 initialization is not complete, so it will be tried again
5191 the next time control enters the declaration.
5193 In theory, this process should be thread-safe, too; multiple
5194 threads should not be able to initialize the variable more
5195 than once. We don't yet attempt to ensure thread-safety. */
5197 /* Create the guard variable. */
5198 guard = get_guard (decl);
5200 /* Begin the conditional initialization. */
5201 if_stmt = begin_if_stmt ();
5202 finish_if_stmt_cond (get_guard_cond (guard), if_stmt);
5203 then_clause = begin_compound_stmt (0);
5205 /* Do the initialization itself. */
5206 assignment = init ? init : NULL_TREE;
5208 /* Once the assignment is complete, set TEMP to 1. Since the
5209 construction of the static object is complete at this point,
5210 we want to make sure TEMP is set to 1 even if a temporary
5211 constructed during the initialization throws an exception
5212 when it is destroyed. So, we combine the initialization and
5213 the assignment to TEMP into a single expression, ensuring
5214 that when we call finish_expr_stmt the cleanups will not be
5215 run until after TEMP is set to 1. */
5216 guard_init = set_guard (guard);
5218 assignment = build_compound_expr (assignment, guard_init);
5220 assignment = guard_init;
5221 finish_expr_stmt (assignment);
5223 /* Use atexit to register a function for destroying this static
5225 register_dtor_fn (decl);
5227 finish_compound_stmt (then_clause);
5228 finish_then_clause (if_stmt);
5229 finish_if_stmt (if_stmt);
5232 static_aggregates = tree_cons (init, decl, static_aggregates);
5236 /* Make TYPE a complete type based on INITIAL_VALUE.
5237 Return 0 if successful, 1 if INITIAL_VALUE can't be deciphered,
5238 2 if there was no information (in which case assume 0 if DO_DEFAULT). */
5241 complete_array_type (tree type, tree initial_value, int do_default)
5243 tree maxindex = NULL_TREE;
5248 /* An array of character type can be initialized from a
5249 brace-enclosed string constant. */
5250 if (char_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (type)))
5251 && TREE_CODE (initial_value) == CONSTRUCTOR
5252 && CONSTRUCTOR_ELTS (initial_value)
5253 && (TREE_CODE (TREE_VALUE (CONSTRUCTOR_ELTS (initial_value)))
5255 && TREE_CHAIN (CONSTRUCTOR_ELTS (initial_value)) == NULL_TREE)
5256 initial_value = TREE_VALUE (CONSTRUCTOR_ELTS (initial_value));
5258 /* Note MAXINDEX is really the maximum index, one less than the
5260 if (TREE_CODE (initial_value) == STRING_CST)
5263 = int_size_in_bytes (TREE_TYPE (TREE_TYPE (initial_value)));
5264 maxindex = build_int_2 ((TREE_STRING_LENGTH (initial_value)
5267 else if (TREE_CODE (initial_value) == CONSTRUCTOR)
5269 tree elts = CONSTRUCTOR_ELTS (initial_value);
5271 maxindex = ssize_int (-1);
5272 for (; elts; elts = TREE_CHAIN (elts))
5274 if (TREE_PURPOSE (elts))
5275 maxindex = TREE_PURPOSE (elts);
5277 maxindex = size_binop (PLUS_EXPR, maxindex, ssize_int (1));
5279 maxindex = copy_node (maxindex);
5283 /* Make an error message unless that happened already. */
5284 if (initial_value != error_mark_node)
5287 initial_value = NULL_TREE;
5289 /* Prevent further error messages. */
5290 maxindex = build_int_2 (0, 0);
5297 maxindex = build_int_2 (0, 0);
5307 domain = build_index_type (maxindex);
5308 TYPE_DOMAIN (type) = domain;
5310 if (! TREE_TYPE (maxindex))
5311 TREE_TYPE (maxindex) = domain;
5313 itype = TREE_TYPE (initial_value);
5316 if (itype && !TYPE_DOMAIN (itype))
5317 TYPE_DOMAIN (itype) = domain;
5318 /* The type of the main variant should never be used for arrays
5319 of different sizes. It should only ever be completed with the
5320 size of the array. */
5321 if (! TYPE_DOMAIN (TYPE_MAIN_VARIANT (type)))
5322 TYPE_DOMAIN (TYPE_MAIN_VARIANT (type)) = domain;
5324 elt_type = TREE_TYPE (type);
5325 TYPE_NEEDS_CONSTRUCTING (type)
5326 = TYPE_NEEDS_CONSTRUCTING (TYPE_MAIN_VARIANT (elt_type));
5327 TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type)
5328 = TYPE_HAS_NONTRIVIAL_DESTRUCTOR (TYPE_MAIN_VARIANT (elt_type));
5331 /* Lay out the type now that we can get the real answer. */
5338 /* Return zero if something is declared to be a member of type
5339 CTYPE when in the context of CUR_TYPE. STRING is the error
5340 message to print in that case. Otherwise, quietly return 1. */
5343 member_function_or_else (tree ctype, tree cur_type, enum overload_flags flags)
5345 if (ctype && ctype != cur_type)
5347 if (flags == DTOR_FLAG)
5348 error ("destructor for alien class `%T' cannot be a member",
5351 error ("constructor for alien class `%T' cannot be a member",
5358 /* Subroutine of `grokdeclarator'. */
5360 /* Generate errors possibly applicable for a given set of specifiers.
5361 This is for ARM $7.1.2. */
5364 bad_specifiers (tree object,
5373 error ("`%D' declared as a `virtual' %s", object, type);
5375 error ("`%D' declared as an `inline' %s", object, type);
5377 error ("`const' and `volatile' function specifiers on `%D' invalid in %s declaration",
5380 cp_error_at ("`%D' declared as a friend", object);
5382 && (TREE_CODE (object) == TYPE_DECL
5383 || (!TYPE_PTRFN_P (TREE_TYPE (object))
5384 && !TYPE_REFFN_P (TREE_TYPE (object))
5385 && !TYPE_PTRMEMFUNC_P (TREE_TYPE (object)))))
5386 cp_error_at ("`%D' declared with an exception specification", object);
5389 /* CTYPE is class type, or null if non-class.
5390 TYPE is type this FUNCTION_DECL should have, either FUNCTION_TYPE
5392 DECLARATOR is the function's name.
5393 PARMS is a chain of PARM_DECLs for the function.
5394 VIRTUALP is truthvalue of whether the function is virtual or not.
5395 FLAGS are to be passed through to `grokclassfn'.
5396 QUALS are qualifiers indicating whether the function is `const'
5398 RAISES is a list of exceptions that this function can raise.
5399 CHECK is 1 if we must find this method in CTYPE, 0 if we should
5400 not look, and -1 if we should not call `grokclassfn' at all.
5402 Returns `NULL_TREE' if something goes wrong, after issuing
5403 applicable error messages. */
5406 grokfndecl (tree ctype,
5410 tree orig_declarator,
5412 enum overload_flags flags,
5424 int staticp = ctype && TREE_CODE (type) == FUNCTION_TYPE;
5425 int has_default_arg = 0;
5429 type = build_exception_variant (type, raises);
5431 decl = build_lang_decl (FUNCTION_DECL, declarator, type);
5432 DECL_ARGUMENTS (decl) = parms;
5433 /* Propagate volatile out from type to decl. */
5434 if (TYPE_VOLATILE (type))
5435 TREE_THIS_VOLATILE (decl) = 1;
5437 /* If this decl has namespace scope, set that up. */
5439 set_decl_namespace (decl, in_namespace, friendp);
5441 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
5443 /* `main' and builtins have implicit 'C' linkage. */
5444 if ((MAIN_NAME_P (declarator)
5445 || (IDENTIFIER_LENGTH (declarator) > 10
5446 && IDENTIFIER_POINTER (declarator)[0] == '_'
5447 && IDENTIFIER_POINTER (declarator)[1] == '_'
5448 && strncmp (IDENTIFIER_POINTER (declarator)+2, "builtin_", 8) == 0))
5449 && current_lang_name == lang_name_cplusplus
5450 && ctype == NULL_TREE
5451 /* NULL_TREE means global namespace. */
5452 && DECL_CONTEXT (decl) == NULL_TREE)
5453 SET_DECL_LANGUAGE (decl, lang_c);
5455 /* Should probably propagate const out from type to decl I bet (mrs). */
5458 DECL_STATIC_FUNCTION_P (decl) = 1;
5459 DECL_CONTEXT (decl) = ctype;
5463 DECL_CONTEXT (decl) = ctype;
5465 if (ctype == NULL_TREE && DECL_MAIN_P (decl))
5467 if (processing_template_decl)
5468 error ("cannot declare `::main' to be a template");
5470 error ("cannot declare `::main' to be inline");
5472 error ("cannot declare `::main' to be static");
5473 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl)),
5475 error ("`main' must return `int'");
5480 /* Members of anonymous types and local classes have no linkage; make
5481 them internal. If a typedef is made later, this will be changed. */
5482 if (ctype && (TYPE_ANONYMOUS_P (ctype)
5483 || decl_function_context (TYPE_MAIN_DECL (ctype))))
5488 /* [basic.link]: A name with no linkage (notably, the name of a class
5489 or enumeration declared in a local scope) shall not be used to
5490 declare an entity with linkage.
5492 Only check this for public decls for now. See core 319, 389. */
5493 t = no_linkage_check (TREE_TYPE (decl));
5496 if (TYPE_ANONYMOUS_P (t))
5498 if (DECL_EXTERN_C_P (decl))
5499 /* Allow this; it's pretty common in C. */;
5502 pedwarn ("non-local function `%#D' uses anonymous type",
5504 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
5506 `%#D' does not refer to the unqualified type, so it is not used for linkage",
5511 pedwarn ("non-local function `%#D' uses local type `%T'",
5516 TREE_PUBLIC (decl) = publicp;
5519 DECL_INTERFACE_KNOWN (decl) = 1;
5520 DECL_NOT_REALLY_EXTERN (decl) = 1;
5523 /* If the declaration was declared inline, mark it as such. */
5525 DECL_DECLARED_INLINE_P (decl) = 1;
5526 /* We inline functions that are explicitly declared inline, or, when
5527 the user explicitly asks us to, all functions. */
5528 if (DECL_DECLARED_INLINE_P (decl)
5529 || (flag_inline_trees == 2 && !DECL_INLINE (decl) && funcdef_flag))
5530 DECL_INLINE (decl) = 1;
5532 DECL_EXTERNAL (decl) = 1;
5533 if (quals && TREE_CODE (type) == FUNCTION_TYPE)
5535 error ("%smember function `%D' cannot have cv-qualifier",
5536 (ctype ? "static " : "non-"), decl);
5537 quals = TYPE_UNQUALIFIED;
5540 if (IDENTIFIER_OPNAME_P (DECL_NAME (decl)))
5541 grok_op_properties (decl, friendp, /*complain=*/true);
5543 if (ctype && decl_function_context (decl))
5544 DECL_NO_STATIC_CHAIN (decl) = 1;
5546 for (t = TYPE_ARG_TYPES (TREE_TYPE (decl)); t; t = TREE_CHAIN (t))
5547 if (TREE_PURPOSE (t)
5548 && TREE_CODE (TREE_PURPOSE (t)) == DEFAULT_ARG)
5550 has_default_arg = 1;
5555 && TREE_CODE (orig_declarator) == TEMPLATE_ID_EXPR)
5559 ("defining explicit specialization `%D' in friend declaration",
5563 tree fns = TREE_OPERAND (orig_declarator, 0);
5564 tree args = TREE_OPERAND (orig_declarator, 1);
5566 if (PROCESSING_REAL_TEMPLATE_DECL_P ())
5568 /* Something like `template <class T> friend void f<T>()'. */
5569 error ("invalid use of template-id `%D' in declaration of primary template",
5575 /* A friend declaration of the form friend void f<>(). Record
5576 the information in the TEMPLATE_ID_EXPR. */
5577 SET_DECL_IMPLICIT_INSTANTIATION (decl);
5579 if (TREE_CODE (fns) == COMPONENT_REF)
5581 /* Due to bison parser ickiness, we will have already looked
5582 up an operator_name or PFUNCNAME within the current class
5583 (see template_id in parse.y). If the current class contains
5584 such a name, we'll get a COMPONENT_REF here. Undo that. */
5586 my_friendly_assert (TREE_TYPE (TREE_OPERAND (fns, 0))
5587 == current_class_type, 20001120);
5588 fns = TREE_OPERAND (fns, 1);
5590 my_friendly_assert (TREE_CODE (fns) == IDENTIFIER_NODE
5591 || TREE_CODE (fns) == OVERLOAD, 20001120);
5592 DECL_TEMPLATE_INFO (decl) = tree_cons (fns, args, NULL_TREE);
5594 if (has_default_arg)
5596 error ("default arguments are not allowed in declaration of friend template specialization `%D'",
5603 error ("`inline' is not allowed in declaration of friend template specialization `%D'",
5611 /* Make the init_value nonzero so pushdecl knows this is not
5612 tentative. error_mark_node is replaced later with the BLOCK. */
5613 DECL_INITIAL (decl) = error_mark_node;
5615 if (TYPE_NOTHROW_P (type) || nothrow_libfn_p (decl))
5616 TREE_NOTHROW (decl) = 1;
5618 /* Caller will do the rest of this. */
5622 if (flags == NO_SPECIAL && ctype && constructor_name_p (declarator, ctype))
5623 DECL_CONSTRUCTOR_P (decl) = 1;
5625 /* Function gets the ugly name, field gets the nice one. This call
5626 may change the type of the function (because of default
5628 if (ctype != NULL_TREE)
5629 grokclassfn (ctype, decl, flags, quals);
5631 decl = check_explicit_specialization (orig_declarator, decl,
5633 2 * (funcdef_flag != 0) +
5634 4 * (friendp != 0));
5635 if (decl == error_mark_node)
5638 if (ctype != NULL_TREE
5639 && (! TYPE_FOR_JAVA (ctype) || check_java_method (decl))
5644 old_decl = check_classfn (ctype, decl,
5645 (processing_template_decl
5646 > template_class_depth (ctype))
5647 ? current_template_parms
5650 if (old_decl && TREE_CODE (old_decl) == TEMPLATE_DECL)
5651 /* Because grokfndecl is always supposed to return a
5652 FUNCTION_DECL, we pull out the DECL_TEMPLATE_RESULT
5653 here. We depend on our callers to figure out that its
5654 really a template that's being returned. */
5655 old_decl = DECL_TEMPLATE_RESULT (old_decl);
5657 if (old_decl && DECL_STATIC_FUNCTION_P (old_decl)
5658 && TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE)
5659 /* Remove the `this' parm added by grokclassfn.
5660 XXX Isn't this done in start_function, too? */
5661 revert_static_member_fn (decl);
5662 if (old_decl && DECL_ARTIFICIAL (old_decl))
5663 error ("definition of implicitly-declared `%D'", old_decl);
5670 /* Since we've smashed OLD_DECL to its
5671 DECL_TEMPLATE_RESULT, we must do the same to DECL. */
5672 if (TREE_CODE (decl) == TEMPLATE_DECL)
5673 decl = DECL_TEMPLATE_RESULT (decl);
5675 /* Attempt to merge the declarations. This can fail, in
5676 the case of some invalid specialization declarations. */
5677 pop_p = push_scope (ctype);
5678 ok = duplicate_decls (decl, old_decl);
5683 error ("no `%#D' member function declared in class `%T'",
5691 if (DECL_CONSTRUCTOR_P (decl) && !grok_ctor_properties (ctype, decl))
5694 if (ctype == NULL_TREE || check)
5698 DECL_VIRTUAL_P (decl) = 1;
5703 /* Create a VAR_DECL named NAME with the indicated TYPE.
5705 If SCOPE is non-NULL, it is the class type or namespace containing
5706 the variable. If SCOPE is NULL, the variable should is created in
5707 the innermost enclosings scope. */
5710 grokvardecl (tree type,
5712 const cp_decl_specifier_seq *declspecs,
5719 my_friendly_assert (!name || TREE_CODE (name) == IDENTIFIER_NODE,
5722 /* Compute the scope in which to place the variable. */
5725 /* An explicit "extern" specifier indicates a namespace-scope
5727 if (declspecs->storage_class == sc_extern)
5728 scope = current_namespace;
5729 else if (!at_function_scope_p ())
5731 scope = current_scope ();
5733 scope = current_namespace;
5738 && (/* If the variable is a namespace-scope variable declared in a
5739 template, we need DECL_LANG_SPECIFIC. */
5740 (TREE_CODE (scope) == NAMESPACE_DECL && processing_template_decl)
5741 /* Similarly for namespace-scope variables with language linkage
5743 || (TREE_CODE (scope) == NAMESPACE_DECL
5744 && current_lang_name != lang_name_cplusplus)
5745 /* Similarly for static data members. */
5747 decl = build_lang_decl (VAR_DECL, name, type);
5749 decl = build_decl (VAR_DECL, name, type);
5751 if (scope && TREE_CODE (scope) == NAMESPACE_DECL)
5752 set_decl_namespace (decl, scope, 0);
5754 DECL_CONTEXT (decl) = scope;
5756 if (declspecs->storage_class == sc_extern)
5758 DECL_THIS_EXTERN (decl) = 1;
5759 DECL_EXTERNAL (decl) = !initialized;
5762 /* In class context, static means one per class,
5763 public access, and static storage. */
5764 if (DECL_CLASS_SCOPE_P (decl))
5766 TREE_PUBLIC (decl) = 1;
5767 TREE_STATIC (decl) = 1;
5768 DECL_EXTERNAL (decl) = 0;
5770 /* At top level, either `static' or no s.c. makes a definition
5771 (perhaps tentative), and absence of `static' makes it public. */
5772 else if (toplevel_bindings_p ())
5774 TREE_PUBLIC (decl) = (declspecs->storage_class != sc_static
5775 && (DECL_THIS_EXTERN (decl) || ! constp));
5776 TREE_STATIC (decl) = ! DECL_EXTERNAL (decl);
5778 /* Not at top level, only `static' makes a static definition. */
5781 TREE_STATIC (decl) = declspecs->storage_class == sc_static;
5782 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl);
5785 if (declspecs->specs[(int)ds_thread])
5787 if (targetm.have_tls)
5788 DECL_THREAD_LOCAL (decl) = 1;
5790 /* A mere warning is sure to result in improper semantics
5791 at runtime. Don't bother to allow this to compile. */
5792 error ("thread-local storage not supported for this target");
5795 if (TREE_PUBLIC (decl))
5797 /* [basic.link]: A name with no linkage (notably, the name of a class
5798 or enumeration declared in a local scope) shall not be used to
5799 declare an entity with linkage.
5801 Only check this for public decls for now. */
5802 tree t = no_linkage_check (TREE_TYPE (decl));
5805 if (TYPE_ANONYMOUS_P (t))
5807 if (DECL_EXTERN_C_P (decl))
5808 /* Allow this; it's pretty common in C. */;
5811 pedwarn ("non-local variable `%#D' uses anonymous type",
5813 if (DECL_ORIGINAL_TYPE (TYPE_NAME (t)))
5815 `%#D' does not refer to the unqualified type, so it is not used for linkage",
5820 pedwarn ("non-local variable `%#D' uses local type `%T'",
5828 /* Create and return a canonical pointer to member function type, for
5829 TYPE, which is a POINTER_TYPE to a METHOD_TYPE. */
5832 build_ptrmemfunc_type (tree type)
5836 tree unqualified_variant = NULL_TREE;
5838 if (type == error_mark_node)
5841 /* If a canonical type already exists for this type, use it. We use
5842 this method instead of type_hash_canon, because it only does a
5843 simple equality check on the list of field members. */
5845 if ((t = TYPE_GET_PTRMEMFUNC_TYPE (type)))
5848 /* Make sure that we always have the unqualified pointer-to-member
5850 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
5852 = build_ptrmemfunc_type (TYPE_MAIN_VARIANT (type));
5854 t = make_aggr_type (RECORD_TYPE);
5855 xref_basetypes (t, NULL_TREE);
5857 /* Let the front-end know this is a pointer to member function... */
5858 TYPE_PTRMEMFUNC_FLAG (t) = 1;
5859 /* ... and not really an aggregate. */
5860 SET_IS_AGGR_TYPE (t, 0);
5862 field = build_decl (FIELD_DECL, pfn_identifier, type);
5865 field = build_decl (FIELD_DECL, delta_identifier, delta_type_node);
5866 TREE_CHAIN (field) = fields;
5869 finish_builtin_struct (t, "__ptrmemfunc_type", fields, ptr_type_node);
5871 /* Zap out the name so that the back-end will give us the debugging
5872 information for this anonymous RECORD_TYPE. */
5873 TYPE_NAME (t) = NULL_TREE;
5875 /* If this is not the unqualified form of this pointer-to-member
5876 type, set the TYPE_MAIN_VARIANT for this type to be the
5877 unqualified type. Since they are actually RECORD_TYPEs that are
5878 not variants of each other, we must do this manually. */
5879 if (cp_type_quals (type) != TYPE_UNQUALIFIED)
5881 t = build_qualified_type (t, cp_type_quals (type));
5882 TYPE_MAIN_VARIANT (t) = unqualified_variant;
5883 TYPE_NEXT_VARIANT (t) = TYPE_NEXT_VARIANT (unqualified_variant);
5884 TYPE_NEXT_VARIANT (unqualified_variant) = t;
5887 /* Cache this pointer-to-member type so that we can find it again
5889 TYPE_SET_PTRMEMFUNC_TYPE (type, t);
5894 /* Create and return a pointer to data member type. */
5897 build_ptrmem_type (tree class_type, tree member_type)
5899 if (TREE_CODE (member_type) == METHOD_TYPE)
5903 arg_types = TYPE_ARG_TYPES (member_type);
5904 class_type = (cp_build_qualified_type
5906 cp_type_quals (TREE_TYPE (TREE_VALUE (arg_types)))));
5908 = build_method_type_directly (class_type,
5909 TREE_TYPE (member_type),
5910 TREE_CHAIN (arg_types));
5911 return build_ptrmemfunc_type (build_pointer_type (member_type));
5915 my_friendly_assert (TREE_CODE (member_type) != FUNCTION_TYPE,
5917 return build_offset_type (class_type, member_type);
5921 /* DECL is a VAR_DECL defined in-class, whose TYPE is also given.
5922 Check to see that the definition is valid. Issue appropriate error
5923 messages. Return 1 if the definition is particularly bad, or 0
5927 check_static_variable_definition (tree decl, tree type)
5929 /* Motion 10 at San Diego: If a static const integral data member is
5930 initialized with an integral constant expression, the initializer
5931 may appear either in the declaration (within the class), or in
5932 the definition, but not both. If it appears in the class, the
5933 member is a member constant. The file-scope definition is always
5935 if (!ARITHMETIC_TYPE_P (type) && TREE_CODE (type) != ENUMERAL_TYPE)
5937 error ("invalid in-class initialization of static data member of non-integral type `%T'",
5939 /* If we just return the declaration, crashes will sometimes
5940 occur. We therefore return void_type_node, as if this were a
5941 friend declaration, to cause callers to completely ignore
5942 this declaration. */
5945 else if (!CP_TYPE_CONST_P (type))
5946 error ("ISO C++ forbids in-class initialization of non-const static member `%D'",
5948 else if (pedantic && !INTEGRAL_TYPE_P (type))
5949 pedwarn ("ISO C++ forbids initialization of member constant `%D' of non-integral type `%T'", decl, type);
5954 /* Given the SIZE (i.e., number of elements) in an array, compute an
5955 appropriate index type for the array. If non-NULL, NAME is the
5956 name of the thing being declared. */
5959 compute_array_index_type (tree name, tree size)
5961 tree type = TREE_TYPE (size);
5964 /* The array bound must be an integer type. */
5965 if (!dependent_type_p (type) && !INTEGRAL_TYPE_P (type))
5968 error ("size of array `%D' has non-integral type `%T'", name, type);
5970 error ("size of array has non-integral type `%T'", type);
5971 size = integer_one_node;
5972 type = TREE_TYPE (size);
5975 if (abi_version_at_least (2)
5976 /* We should only handle value dependent expressions specially. */
5977 ? value_dependent_expression_p (size)
5978 /* But for abi-1, we handled all instances in templates. This
5979 effects the manglings produced. */
5980 : processing_template_decl)
5981 return build_index_type (build_min (MINUS_EXPR, sizetype,
5982 size, integer_one_node));
5984 /* The size might be the result of a cast. */
5985 STRIP_TYPE_NOPS (size);
5987 /* It might be a const variable or enumeration constant. */
5988 size = decl_constant_value (size);
5990 /* Normally, the array-bound will be a constant. */
5991 if (TREE_CODE (size) == INTEGER_CST)
5993 /* Check to see if the array bound overflowed. Make that an
5994 error, no matter how generous we're being. */
5995 int old_flag_pedantic_errors = flag_pedantic_errors;
5996 int old_pedantic = pedantic;
5997 pedantic = flag_pedantic_errors = 1;
5998 constant_expression_warning (size);
5999 pedantic = old_pedantic;
6000 flag_pedantic_errors = old_flag_pedantic_errors;
6002 /* An array must have a positive number of elements. */
6003 if (INT_CST_LT (size, integer_zero_node))
6006 error ("size of array `%D' is negative", name);
6008 error ("size of array is negative");
6009 size = integer_one_node;
6011 /* As an extension we allow zero-sized arrays. We always allow
6012 them in system headers because glibc uses them. */
6013 else if (integer_zerop (size) && pedantic && !in_system_header)
6016 pedwarn ("ISO C++ forbids zero-size array `%D'", name);
6018 pedwarn ("ISO C++ forbids zero-size array");
6021 else if (TREE_CONSTANT (size))
6023 /* `(int) &fn' is not a valid array bound. */
6025 error ("size of array `%D' is not an integral constant-expression",
6028 error ("size of array is not an integral constant-expression");
6033 pedwarn ("ISO C++ forbids variable-size array `%D'", name);
6035 pedwarn ("ISO C++ forbids variable-size array");
6038 if (processing_template_decl && !TREE_CONSTANT (size))
6039 /* A variable sized array. */
6040 itype = build_min (MINUS_EXPR, sizetype, size, integer_one_node);
6043 /* Compute the index of the largest element in the array. It is
6044 one less than the number of elements in the array. */
6046 = fold (cp_build_binary_op (MINUS_EXPR,
6047 cp_convert (ssizetype, size),
6048 cp_convert (ssizetype, integer_one_node)));
6049 if (!TREE_CONSTANT (itype))
6050 /* A variable sized array. */
6051 itype = variable_size (itype);
6052 /* Make sure that there was no overflow when creating to a signed
6053 index type. (For example, on a 32-bit machine, an array with
6054 size 2^32 - 1 is too big.) */
6055 else if (TREE_OVERFLOW (itype))
6057 error ("overflow in array dimension");
6058 TREE_OVERFLOW (itype) = 0;
6062 /* Create and return the appropriate index type. */
6063 return build_index_type (itype);
6066 /* Returns the scope (if any) in which the entity declared by
6067 DECLARATOR will be located. If the entity was declared with an
6068 unqualified name, NULL_TREE is returned. */
6071 get_scope_of_declarator (const cp_declarator *declarator)
6073 while (declarator && declarator->kind != cdk_id)
6074 declarator = declarator->declarator;
6076 /* If the declarator-id is a SCOPE_REF, the scope in which the
6077 declaration occurs is the first operand. */
6079 && declarator->u.id.name
6080 && TREE_CODE (declarator->u.id.name) == SCOPE_REF)
6081 return TREE_OPERAND (declarator->u.id.name, 0);
6083 /* Otherwise, the declarator is not a quablified name; the entity will
6084 be declared in the current scope. */
6088 /* Returns an ARRAY_TYPE for an array with SIZE elements of the
6089 indicated TYPE. If non-NULL, NAME is the NAME of the declaration
6093 create_array_type_for_decl (tree name, tree type, tree size)
6095 tree itype = NULL_TREE;
6096 const char* error_msg;
6098 /* If things have already gone awry, bail now. */
6099 if (type == error_mark_node || size == error_mark_node)
6100 return error_mark_node;
6102 /* Assume that everything will go OK. */
6105 /* There are some types which cannot be array elements. */
6106 switch (TREE_CODE (type))
6109 error_msg = "array of void";
6113 error_msg = "array of functions";
6116 case REFERENCE_TYPE:
6117 error_msg = "array of references";
6121 error_msg = "array of function members";
6128 /* If something went wrong, issue an error-message and return. */
6132 error ("declaration of `%D' as %s", name, error_msg);
6134 error ("creating %s", error_msg);
6136 return error_mark_node;
6141 The constant expressions that specify the bounds of the arrays
6142 can be omitted only for the first member of the sequence. */
6143 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
6146 error ("declaration of `%D' as multidimensional array must have bounds for all dimensions except the first",
6149 error ("multidimensional array must have bounds for all dimensions except the first");
6151 return error_mark_node;
6154 /* Figure out the index type for the array. */
6156 itype = compute_array_index_type (name, size);
6159 T is called the array element type; this type shall not be [...] an
6160 abstract class type. */
6161 abstract_virtuals_error (name, type);
6163 return build_cplus_array_type (type, itype);
6166 /* Check that it's OK to declare a function with the indicated TYPE.
6167 SFK indicates the kind of special function (if any) that this
6168 function is. OPTYPE is the type given in a conversion operator
6169 declaration. Returns the actual return type of the function; that
6170 may be different than TYPE if an error occurs, or for certain
6171 special functions. */
6174 check_special_function_return_type (special_function_kind sfk,
6180 case sfk_constructor:
6182 error ("return type specification for constructor invalid");
6184 type = void_type_node;
6187 case sfk_destructor:
6189 error ("return type specification for destructor invalid");
6190 type = void_type_node;
6193 case sfk_conversion:
6194 if (type && !same_type_p (type, optype))
6195 error ("operator `%T' declared to return `%T'", optype, type);
6197 pedwarn ("return type specified for `operator %T'", optype);
6209 /* Given declspecs and a declarator (abstract or otherwise), determine
6210 the name and type of the object declared and construct a DECL node
6213 DECLSPECS is a chain of tree_list nodes whose value fields
6214 are the storage classes and type specifiers.
6216 DECL_CONTEXT says which syntactic context this declaration is in:
6217 NORMAL for most contexts. Make a VAR_DECL or FUNCTION_DECL or TYPE_DECL.
6218 FUNCDEF for a function definition. Like NORMAL but a few different
6219 error messages in each case. Return value may be zero meaning
6220 this definition is too screwy to try to parse.
6221 MEMFUNCDEF for a function definition. Like FUNCDEF but prepares to
6222 handle member functions (which have FIELD context).
6223 Return value may be zero meaning this definition is too screwy to
6225 PARM for a parameter declaration (either within a function prototype
6226 or before a function body). Make a PARM_DECL, or return void_type_node.
6227 CATCHPARM for a parameter declaration before a catch clause.
6228 TYPENAME if for a typename (in a cast or sizeof).
6229 Don't make a DECL node; just return the ..._TYPE node.
6230 FIELD for a struct or union field; make a FIELD_DECL.
6231 BITFIELD for a field with specified width.
6232 INITIALIZED is 1 if the decl has an initializer.
6234 ATTRLIST is a pointer to the list of attributes, which may be NULL
6235 if there are none; *ATTRLIST may be modified if attributes from inside
6236 the declarator should be applied to the declaration.
6238 When this function is called, scoping variables (such as
6239 CURRENT_CLASS_TYPE) should reflect the scope in which the
6240 declaration occurs, not the scope in which the new declaration will
6241 be placed. For example, on:
6245 when grokdeclarator is called for `S::f', the CURRENT_CLASS_TYPE
6246 should not be `S'. */
6249 grokdeclarator (const cp_declarator *declarator,
6250 const cp_decl_specifier_seq *declspecs,
6251 enum decl_context decl_context,
6255 tree type = NULL_TREE;
6258 int virtualp, explicitp, friendp, inlinep, staticp;
6259 int explicit_int = 0;
6260 int explicit_char = 0;
6261 int defaulted_int = 0;
6262 tree dependant_name = NULL_TREE;
6264 tree typedef_decl = NULL_TREE;
6265 const char *name = NULL;
6266 tree typedef_type = NULL_TREE;
6267 int funcdef_flag = 0;
6268 cp_declarator_kind innermost_code = cdk_error;
6271 /* See the code below that used this. */
6272 tree decl_attr = NULL_TREE;
6275 /* Keep track of what sort of function is being processed
6276 so that we can warn about default return values, or explicit
6277 return values which do not match prescribed defaults. */
6278 special_function_kind sfk = sfk_none;
6280 tree dname = NULL_TREE;
6281 tree ctor_return_type = NULL_TREE;
6282 enum overload_flags flags = NO_SPECIAL;
6283 cp_cv_quals quals = TYPE_UNQUALIFIED;
6284 tree raises = NULL_TREE;
6285 int template_count = 0;
6286 tree returned_attrs = NULL_TREE;
6287 tree parms = NULL_TREE;
6288 const cp_declarator *id_declarator;
6289 /* The unqualified name of the declarator; either an
6290 IDENTIFIER_NODE, BIT_NOT_EXPR, or TEMPLATE_ID_EXPR. */
6291 tree unqualified_id;
6292 /* The class type, if any, in which this entity is located,
6293 or NULL_TREE if none. Note that this value may be different from
6294 the current class type; for example if an attempt is made to declare
6295 "A::f" inside "B", this value will be "A". */
6296 tree ctype = current_class_type;
6297 /* The NAMESPACE_DECL for the namespace in which this entity is
6298 located. If an unqualified name is used to declare the entity,
6299 this value will be NULL_TREE, even if the entity is located at
6301 tree in_namespace = NULL_TREE;
6303 cp_storage_class storage_class;
6304 bool unsigned_p, signed_p, short_p, long_p, thread_p;
6306 signed_p = declspecs->specs[(int)ds_signed];
6307 unsigned_p = declspecs->specs[(int)ds_unsigned];
6308 short_p = declspecs->specs[(int)ds_short];
6309 long_p = declspecs->specs[(int)ds_long];
6310 thread_p = declspecs->specs[(int)ds_thread];
6312 if (decl_context == FUNCDEF)
6313 funcdef_flag = 1, decl_context = NORMAL;
6314 else if (decl_context == MEMFUNCDEF)
6315 funcdef_flag = -1, decl_context = FIELD;
6316 else if (decl_context == BITFIELD)
6317 bitfield = 1, decl_context = FIELD;
6319 /* Look inside a declarator for the name being declared
6320 and get it as a string, for an error message. */
6321 for (id_declarator = declarator;
6323 id_declarator = id_declarator->declarator)
6325 if (id_declarator->kind != cdk_id)
6326 innermost_code = id_declarator->kind;
6328 switch (id_declarator->kind)
6331 if (id_declarator->declarator
6332 && id_declarator->declarator->kind == cdk_id)
6334 sfk = id_declarator->declarator->u.id.sfk;
6335 if (sfk == sfk_destructor)
6342 tree decl = id_declarator->u.id.name;
6345 if (TREE_CODE (decl) == SCOPE_REF)
6347 tree qualifying_scope = TREE_OPERAND (decl, 0);
6349 /* It is valid to write:
6351 class C { void f(); };
6355 The standard is not clear about whether `typedef const C D' is
6356 legal; as of 2002-09-15 the committee is considering
6357 that question. EDG 3.0 allows that syntax.
6358 Therefore, we do as well. */
6359 if (qualifying_scope && TYPE_P (qualifying_scope))
6361 ctype = TYPE_MAIN_VARIANT (qualifying_scope);
6362 if (innermost_code != cdk_function
6363 && current_class_type
6364 && !UNIQUELY_DERIVED_FROM_P (ctype,
6365 current_class_type))
6367 error ("type `%T' is not derived from type `%T'",
6368 ctype, current_class_type);
6371 TREE_OPERAND (decl, 0) = ctype;
6373 else if (TREE_CODE (qualifying_scope) == NAMESPACE_DECL)
6374 in_namespace = qualifying_scope;
6375 decl = TREE_OPERAND (decl, 1);
6377 if (TREE_CODE (decl) == BASELINK)
6378 decl = BASELINK_FUNCTIONS (decl);
6379 if (decl == error_mark_node)
6380 return error_mark_node;
6381 switch (TREE_CODE (decl))
6385 tree type = TREE_OPERAND (decl, 0);
6386 type = constructor_name (type);
6387 name = IDENTIFIER_POINTER (type);
6391 case TEMPLATE_ID_EXPR:
6393 tree fns = TREE_OPERAND (decl, 0);
6396 if (TREE_CODE (dname) == COMPONENT_REF)
6397 dname = TREE_OPERAND (dname, 1);
6398 if (TREE_CODE (dname) != IDENTIFIER_NODE)
6400 my_friendly_assert (is_overloaded_fn (dname),
6402 dname = DECL_NAME (get_first_fn (dname));
6407 case IDENTIFIER_NODE:
6408 if (TREE_CODE (decl) == IDENTIFIER_NODE)
6411 if (C_IS_RESERVED_WORD (dname))
6413 error ("declarator-id missing; using reserved word `%D'",
6415 name = IDENTIFIER_POINTER (dname);
6417 else if (!IDENTIFIER_TYPENAME_P (dname))
6418 name = IDENTIFIER_POINTER (dname);
6421 my_friendly_assert (flags == NO_SPECIAL, 154);
6422 flags = TYPENAME_FLAG;
6423 ctor_return_type = TREE_TYPE (dname);
6424 sfk = sfk_conversion;
6425 if (is_typename_at_global_scope (dname))
6426 name = IDENTIFIER_POINTER (dname);
6428 name = "<invalid operator>";
6433 dname = constructor_name (TREE_TYPE (decl));
6434 name = IDENTIFIER_POINTER (dname);
6455 if (id_declarator->kind == cdk_id)
6459 /* A function definition's declarator must have the form of
6460 a function declarator. */
6462 if (funcdef_flag && innermost_code != cdk_function)
6465 if (((dname && IDENTIFIER_OPNAME_P (dname)) || flags == TYPENAME_FLAG)
6466 && innermost_code != cdk_function
6467 && ! (ctype && !declspecs->any_specifiers_p))
6469 error ("declaration of `%D' as non-function", dname);
6470 return void_type_node;
6473 /* Anything declared one level down from the top level
6474 must be one of the parameters of a function
6475 (because the body is at least two levels down). */
6477 /* This heuristic cannot be applied to C++ nodes! Fixed, however,
6478 by not allowing C++ class definitions to specify their parameters
6479 with xdecls (must be spec.d in the parmlist).
6481 Since we now wait to push a class scope until we are sure that
6482 we are in a legitimate method context, we must set oldcname
6483 explicitly (since current_class_name is not yet alive).
6485 We also want to avoid calling this a PARM if it is in a namespace. */
6487 if (decl_context == NORMAL && !toplevel_bindings_p ())
6489 struct cp_binding_level *b = current_binding_level;
6490 current_binding_level = b->level_chain;
6491 if (current_binding_level != 0 && toplevel_bindings_p ())
6492 decl_context = PARM;
6493 current_binding_level = b;
6497 name = decl_context == PARM ? "parameter" : "type name";
6499 /* If there were multiple types specified in the decl-specifier-seq,
6500 issue an error message. */
6501 if (declspecs->multiple_types_p)
6502 error ("two or more data types in declaration of `%s'", name);
6503 /* Extract the basic type from the decl-specifier-seq. */
6504 type = declspecs->type;
6505 if (type == error_mark_node)
6507 /* If the entire declaration is itself tagged as deprecated then
6508 suppress reports of deprecated items. */
6509 if (type && TREE_DEPRECATED (type)
6510 && deprecated_state != DEPRECATED_SUPPRESS)
6511 warn_deprecated_use (type);
6512 if (type && TREE_CODE (type) == TYPE_DECL)
6514 typedef_decl = type;
6515 type = TREE_TYPE (typedef_decl);
6517 /* No type at all: default to `int', and set DEFAULTED_INT
6518 because it was not a user-defined typedef. */
6519 if (type == NULL_TREE && (signed_p || unsigned_p || long_p || short_p))
6521 /* These imply 'int'. */
6522 type = integer_type_node;
6526 explicit_int = declspecs->explicit_int_p;
6527 explicit_char = declspecs->explicit_char_p;
6529 /* Check for repeated decl-specifiers. */
6530 for (ds = ds_first; ds != ds_last; ++ds)
6532 unsigned count = declspecs->specs[(int)ds];
6535 /* The "long" specifier is a special case because of
6540 error ("`long long long' is too long for GCC");
6541 else if (pedantic && !in_system_header && warn_long_long)
6542 pedwarn ("ISO C++ does not support `long long'");
6546 else if (declspecs->specs[(int)ds] > 1)
6548 static const char *const decl_spec_names[] = {
6564 error ("duplicate `%s'", decl_spec_names[(int)ds]);
6569 /* See the code below that used this. */
6571 decl_attr = DECL_ATTRIBUTES (typedef_decl);
6573 typedef_type = type;
6576 if (sfk != sfk_none)
6577 type = check_special_function_return_type (sfk, type,
6579 else if (type == NULL_TREE)
6585 /* We handle `main' specially here, because 'main () { }' is so
6586 common. With no options, it is allowed. With -Wreturn-type,
6587 it is a warning. It is only an error with -pedantic-errors. */
6588 is_main = (funcdef_flag
6589 && dname && MAIN_NAME_P (dname)
6590 && ctype == NULL_TREE
6591 && in_namespace == NULL_TREE
6592 && current_namespace == global_namespace);
6594 if (in_system_header || flag_ms_extensions)
6595 /* Allow it, sigh. */;
6596 else if (pedantic || ! is_main)
6597 pedwarn ("ISO C++ forbids declaration of `%s' with no type",
6599 else if (warn_return_type)
6600 warning ("ISO C++ forbids declaration of `%s' with no type",
6603 type = integer_type_node;
6608 /* Now process the modifiers that were specified
6609 and check for invalid combinations. */
6611 /* Long double is a special combination. */
6612 if (long_p && TYPE_MAIN_VARIANT (type) == double_type_node)
6615 type = build_qualified_type (long_double_type_node,
6616 cp_type_quals (type));
6619 /* Check all other uses of type modifiers. */
6621 if (unsigned_p || signed_p || long_p || short_p)
6625 if (TREE_CODE (type) == REAL_TYPE)
6626 error ("short, signed or unsigned invalid for `%s'", name);
6627 else if (TREE_CODE (type) != INTEGER_TYPE)
6628 error ("long, short, signed or unsigned invalid for `%s'", name);
6629 else if (long_p && short_p)
6630 error ("long and short specified together for `%s'", name);
6631 else if ((long_p || short_p) && explicit_char)
6632 error ("long or short specified with char for `%s'", name);
6633 else if ((long_p|| short_p) && TREE_CODE (type) == REAL_TYPE)
6634 error ("long or short specified with floating type for `%s'", name);
6635 else if (signed_p && unsigned_p)
6636 error ("signed and unsigned given together for `%s'", name);
6640 if (!explicit_int && !defaulted_int && !explicit_char && pedantic)
6642 pedwarn ("long, short, signed or unsigned used invalidly for `%s'",
6644 if (flag_pedantic_errors)
6649 /* Discard the type modifiers if they are invalid. */
6660 /* Decide whether an integer type is signed or not.
6661 Optionally treat bitfields as signed by default. */
6665 It is implementation-defined whether a plain (neither
6666 explicitly signed or unsigned) char, short, int, or long
6667 bit-field is signed or unsigned.
6669 Naturally, we extend this to long long as well. Note that
6670 this does not include wchar_t. */
6671 || (bitfield && !flag_signed_bitfields
6673 /* A typedef for plain `int' without `signed' can be
6674 controlled just like plain `int', but a typedef for
6675 `signed int' cannot be so controlled. */
6677 && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl))
6678 && (TREE_CODE (type) == INTEGER_TYPE
6679 || TREE_CODE (type) == CHAR_TYPE)
6680 && !same_type_p (TYPE_MAIN_VARIANT (type), wchar_type_node)))
6683 type = long_long_unsigned_type_node;
6685 type = long_unsigned_type_node;
6687 type = short_unsigned_type_node;
6688 else if (type == char_type_node)
6689 type = unsigned_char_type_node;
6690 else if (typedef_decl)
6691 type = c_common_unsigned_type (type);
6693 type = unsigned_type_node;
6695 else if (signed_p && type == char_type_node)
6696 type = signed_char_type_node;
6698 type = long_long_integer_type_node;
6700 type = long_integer_type_node;
6702 type = short_integer_type_node;
6704 if (declspecs->specs[(int)ds_complex])
6706 if (TREE_CODE (type) != INTEGER_TYPE && TREE_CODE (type) != REAL_TYPE)
6707 error ("complex invalid for `%s'", name);
6708 /* If we just have "complex", it is equivalent to
6709 "complex double", but if any modifiers at all are specified it is
6710 the complex form of TYPE. E.g, "complex short" is
6711 "complex short int". */
6713 else if (defaulted_int && ! longlong
6714 && ! (long_p || short_p || signed_p || unsigned_p))
6715 type = complex_double_type_node;
6716 else if (type == integer_type_node)
6717 type = complex_integer_type_node;
6718 else if (type == float_type_node)
6719 type = complex_float_type_node;
6720 else if (type == double_type_node)
6721 type = complex_double_type_node;
6722 else if (type == long_double_type_node)
6723 type = complex_long_double_type_node;
6725 type = build_complex_type (type);
6728 type_quals = TYPE_UNQUALIFIED;
6729 if (declspecs->specs[(int)ds_const])
6730 type_quals |= TYPE_QUAL_CONST;
6731 if (declspecs->specs[(int)ds_volatile])
6732 type_quals |= TYPE_QUAL_VOLATILE;
6733 if (declspecs->specs[(int)ds_restrict])
6734 type_quals |= TYPE_QUAL_RESTRICT;
6735 if (sfk == sfk_conversion && type_quals != TYPE_UNQUALIFIED)
6736 error ("qualifiers are not allowed on declaration of `operator %T'",
6739 type_quals |= cp_type_quals (type);
6740 type = cp_build_qualified_type_real
6741 (type, type_quals, ((typedef_decl && !DECL_ARTIFICIAL (typedef_decl)
6742 ? tf_ignore_bad_quals : 0) | tf_error | tf_warning));
6743 /* We might have ignored or rejected some of the qualifiers. */
6744 type_quals = cp_type_quals (type);
6747 inlinep = !! declspecs->specs[(int)ds_inline];
6748 virtualp = !! declspecs->specs[(int)ds_virtual];
6749 explicitp = !! declspecs->specs[(int)ds_explicit];
6751 storage_class = declspecs->storage_class;
6752 if (storage_class == sc_static)
6753 staticp = 1 + (decl_context == FIELD);
6755 if (virtualp && staticp == 2)
6757 error ("member `%D' cannot be declared both virtual and static",
6761 friendp = !! declspecs->specs[(int)ds_friend];
6763 if (dependant_name && !friendp)
6765 error ("`%T::%D' is not a valid declarator", ctype, dependant_name);
6766 return void_type_node;
6769 /* Issue errors about use of storage classes for parameters. */
6770 if (decl_context == PARM)
6772 if (declspecs->specs[(int)ds_typedef])
6773 error ("typedef declaration invalid in parameter declaration");
6774 else if (storage_class == sc_static
6775 || storage_class == sc_extern
6777 error ("storage class specifiers invalid in parameter declarations");
6780 /* Give error if `virtual' is used outside of class declaration. */
6782 && (current_class_name == NULL_TREE || decl_context != FIELD))
6784 error ("virtual outside class declaration");
6788 /* Static anonymous unions are dealt with here. */
6789 if (staticp && decl_context == TYPENAME
6791 && ANON_AGGR_TYPE_P (declspecs->type))
6792 decl_context = FIELD;
6794 /* Warn about storage classes that are invalid for certain
6795 kinds of declarations (parameters, typenames, etc.). */
6796 if (declspecs->multiple_storage_classes_p)
6797 error ("multiple storage classes in declaration of `%s'", name);
6800 && storage_class != sc_extern
6801 && storage_class != sc_static)
6802 || declspecs->specs[(int)ds_typedef]))
6804 error ("multiple storage classes in declaration of `%s'", name);
6807 else if (decl_context != NORMAL
6808 && ((storage_class != sc_none
6809 && storage_class != sc_mutable)
6812 if ((decl_context == PARM || decl_context == CATCHPARM)
6813 && (storage_class == sc_register
6814 || storage_class == sc_auto))
6816 else if (declspecs->specs[(int)ds_typedef])
6818 else if (decl_context == FIELD
6819 /* C++ allows static class elements. */
6820 && storage_class == sc_static)
6821 /* C++ also allows inlines and signed and unsigned elements,
6822 but in those cases we don't come in here. */
6826 if (decl_context == FIELD)
6828 tree tmp = NULL_TREE;
6833 /* Avoid trying to get an operand off an identifier node. */
6834 if (declarator->kind != cdk_id)
6835 tmp = declarator->declarator->u.id.name;
6837 tmp = declarator->u.id.name;
6838 op = IDENTIFIER_OPNAME_P (tmp);
6839 if (IDENTIFIER_TYPENAME_P (tmp))
6841 if (is_typename_at_global_scope (tmp))
6842 name = IDENTIFIER_POINTER (tmp);
6844 name = "<invalid operator>";
6847 error ("storage class specified for %s `%s'",
6848 op ? "member operator" : "field",
6853 if (decl_context == PARM || decl_context == CATCHPARM)
6854 error ("storage class specified for parameter `%s'", name);
6856 error ("storage class specified for typename");
6858 if (storage_class == sc_register
6859 || storage_class == sc_auto
6860 || storage_class == sc_extern
6862 storage_class = sc_none;
6865 else if (storage_class == sc_extern && initialized
6868 if (toplevel_bindings_p ())
6870 /* It's common practice (and completely valid) to have a const
6871 be initialized and declared extern. */
6872 if (!(type_quals & TYPE_QUAL_CONST))
6873 warning ("`%s' initialized and declared `extern'", name);
6876 error ("`%s' has both `extern' and initializer", name);
6878 else if (storage_class == sc_extern && funcdef_flag
6879 && ! toplevel_bindings_p ())
6880 error ("nested function `%s' declared `extern'", name);
6881 else if (toplevel_bindings_p ())
6883 if (storage_class == sc_auto)
6884 error ("top-level declaration of `%s' specifies `auto'", name);
6887 && storage_class != sc_extern
6888 && storage_class != sc_static)
6890 error ("function-scope `%s' implicitly auto and declared `__thread'",
6895 if (storage_class && friendp)
6896 error ("storage class specifiers invalid in friend function declarations");
6899 unqualified_id = NULL_TREE;
6902 unqualified_id = id_declarator->u.id.name;
6903 if (TREE_CODE (unqualified_id) == SCOPE_REF)
6904 unqualified_id = TREE_OPERAND (unqualified_id, 1);
6905 if (TREE_CODE (unqualified_id) == BASELINK)
6906 unqualified_id = BASELINK_FUNCTIONS (unqualified_id);
6907 switch (TREE_CODE (unqualified_id))
6911 = constructor_name (TREE_OPERAND (unqualified_id, 0));
6916 = constructor_name (TREE_TYPE (unqualified_id));
6919 case IDENTIFIER_NODE:
6920 case TEMPLATE_ID_EXPR:
6928 /* Determine the type of the entity declared by recurring on the
6931 declarator && declarator->kind != cdk_id;
6932 declarator = declarator->declarator)
6934 const cp_declarator *inner_declarator;
6937 if (type == error_mark_node)
6938 return error_mark_node;
6940 inner_declarator = declarator->declarator;
6942 attrs = declarator->attributes;
6948 if (declarator == NULL || declarator->kind == cdk_id)
6949 attr_flags |= (int) ATTR_FLAG_DECL_NEXT;
6950 if (declarator->kind == cdk_function)
6951 attr_flags |= (int) ATTR_FLAG_FUNCTION_NEXT;
6952 if (declarator->kind == cdk_array)
6953 attr_flags |= (int) ATTR_FLAG_ARRAY_NEXT;
6954 returned_attrs = decl_attributes (&type,
6955 chainon (returned_attrs, attrs),
6959 switch (declarator->kind)
6962 type = create_array_type_for_decl (dname, type,
6963 declarator->u.array.bounds);
6964 if (inner_declarator
6965 && (inner_declarator->kind == cdk_pointer
6966 || inner_declarator->kind == cdk_reference
6967 || inner_declarator->kind == cdk_ptrmem))
6968 /* We can never complete an array type which is the
6969 target of a pointer, so go ahead and lay it out. */
6978 /* Declaring a function type.
6979 Make sure we have a valid type for the function to return. */
6981 /* We now know that the TYPE_QUALS don't apply to the
6982 decl, but to its return type. */
6983 type_quals = TYPE_UNQUALIFIED;
6985 /* Warn about some types functions can't return. */
6987 if (TREE_CODE (type) == FUNCTION_TYPE)
6989 error ("`%s' declared as function returning a function", name);
6990 type = integer_type_node;
6992 if (TREE_CODE (type) == ARRAY_TYPE)
6994 error ("`%s' declared as function returning an array", name);
6995 type = integer_type_node;
6998 /* Pick up type qualifiers which should be applied to `this'. */
6999 quals = declarator->u.function.qualifiers;
7001 /* Pick up the exception specifications. */
7002 raises = declarator->u.function.exception_specification;
7004 /* Say it's a definition only for the CALL_EXPR
7005 closest to the identifier. */
7006 funcdecl_p = inner_declarator && inner_declarator->kind == cdk_id;
7008 if (ctype == NULL_TREE
7009 && decl_context == FIELD
7011 && (friendp == 0 || dname == current_class_name))
7012 ctype = current_class_type;
7014 if (ctype && sfk == sfk_conversion)
7015 TYPE_HAS_CONVERSION (ctype) = 1;
7016 if (ctype && (sfk == sfk_constructor
7017 || sfk == sfk_destructor))
7019 /* We are within a class's scope. If our declarator name
7020 is the same as the class name, and we are defining
7021 a function, then it is a constructor/destructor, and
7022 therefore returns a void type. */
7024 if (flags == DTOR_FLAG)
7026 /* ISO C++ 12.4/2. A destructor may not be
7027 declared const or volatile. A destructor may
7030 error ("destructor cannot be static member function");
7033 error ("destructors may not be cv-qualified");
7034 quals = TYPE_UNQUALIFIED;
7036 if (decl_context == FIELD)
7038 if (! member_function_or_else (ctype,
7041 return void_type_node;
7044 else /* It's a constructor. */
7048 /* ISO C++ 12.1. A constructor may not be
7049 declared const or volatile. A constructor may
7050 not be virtual. A constructor may not be
7053 error ("constructor cannot be static member function");
7056 pedwarn ("constructors cannot be declared virtual");
7061 error ("constructors may not be cv-qualified");
7062 quals = TYPE_UNQUALIFIED;
7064 if (decl_context == FIELD)
7066 if (! member_function_or_else (ctype,
7069 return void_type_node;
7070 TYPE_HAS_CONSTRUCTOR (ctype) = 1;
7071 if (sfk != sfk_constructor)
7075 if (decl_context == FIELD)
7081 error ("can't initialize friend function `%s'", name);
7084 /* Cannot be both friend and virtual. */
7085 error ("virtual functions cannot be friends");
7088 if (decl_context == NORMAL)
7089 error ("friend declaration not in class definition");
7090 if (current_function_decl && funcdef_flag)
7091 error ("can't define friend function `%s' in a local class definition",
7095 arg_types = grokparms (declarator->u.function.parameters,
7098 if (inner_declarator
7099 && inner_declarator->kind == cdk_id
7100 && inner_declarator->u.id.sfk == sfk_destructor
7101 && arg_types != void_list_node)
7103 error ("destructors may not have parameters");
7104 arg_types = void_list_node;
7108 type = build_function_type (type, arg_types);
7115 /* Filter out pointers-to-references and references-to-references.
7116 We can get these if a TYPE_DECL is used. */
7118 if (TREE_CODE (type) == REFERENCE_TYPE)
7120 error (declarator->kind == cdk_reference
7121 ? "cannot declare reference to `%#T'"
7122 : "cannot declare pointer to `%#T'", type);
7123 type = TREE_TYPE (type);
7125 else if (VOID_TYPE_P (type))
7127 if (declarator->kind == cdk_reference)
7128 error ("cannot declare reference to `%#T'", type);
7129 else if (declarator->kind == cdk_ptrmem)
7130 error ("cannot declare pointer to `%#T' member", type);
7133 /* We now know that the TYPE_QUALS don't apply to the decl,
7134 but to the target of the pointer. */
7135 type_quals = TYPE_UNQUALIFIED;
7137 if (declarator->kind == cdk_ptrmem
7138 && (TREE_CODE (type) == FUNCTION_TYPE
7139 || (quals && TREE_CODE (type) == METHOD_TYPE)))
7141 tree dummy = build_decl (TYPE_DECL, NULL_TREE, type);
7142 grok_method_quals (declarator->u.pointer.class_type,
7144 type = TREE_TYPE (dummy);
7145 quals = TYPE_UNQUALIFIED;
7148 if (declarator->kind == cdk_reference)
7150 if (!VOID_TYPE_P (type))
7151 type = build_reference_type (type);
7153 else if (TREE_CODE (type) == METHOD_TYPE)
7154 type = build_ptrmemfunc_type (build_pointer_type (type));
7155 else if (declarator->kind == cdk_ptrmem)
7156 type = build_ptrmem_type (declarator->u.pointer.class_type,
7159 type = build_pointer_type (type);
7161 /* Process a list of type modifier keywords (such as
7162 const or volatile) that were given inside the `*' or `&'. */
7164 if (declarator->u.pointer.qualifiers)
7167 = cp_build_qualified_type (type,
7168 declarator->u.pointer.qualifiers);
7169 type_quals = cp_type_quals (type);
7182 if (unqualified_id && TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR
7183 && TREE_CODE (type) != FUNCTION_TYPE
7184 && TREE_CODE (type) != METHOD_TYPE)
7186 error ("template-id `%D' used as a declarator",
7188 unqualified_id = dname;
7191 /* If DECLARATOR is non-NULL, we know it is a cdk_id declarator;
7192 otherwise, we would not have exited the loop above. */
7194 && TREE_CODE (declarator->u.id.name) == SCOPE_REF
7195 /* If the qualifying scope was invalid, it will have been set to
7197 && TREE_OPERAND (declarator->u.id.name, 0)
7198 && TYPE_P (TREE_OPERAND (declarator->u.id.name, 0)))
7202 ctype = TREE_OPERAND (declarator->u.id.name, 0);
7204 ctype = TYPE_MAIN_VARIANT (ctype);
7206 while (t != NULL_TREE && CLASS_TYPE_P (t))
7208 /* You're supposed to have one `template <...>' for every
7209 template class, but you don't need one for a full
7210 specialization. For example:
7212 template <class T> struct S{};
7213 template <> struct S<int> { void f(); };
7214 void S<int>::f () {}
7216 is correct; there shouldn't be a `template <>' for the
7217 definition of `S<int>::f'. */
7218 if (CLASSTYPE_TEMPLATE_INFO (t)
7219 && (CLASSTYPE_TEMPLATE_INSTANTIATION (t)
7220 || uses_template_parms (CLASSTYPE_TI_ARGS (t)))
7221 && PRIMARY_TEMPLATE_P (CLASSTYPE_TI_TEMPLATE (t)))
7222 template_count += 1;
7224 t = TYPE_MAIN_DECL (t);
7225 t = DECL_CONTEXT (t);
7228 if (ctype == current_class_type)
7234 Is this ill-formed? */
7237 pedwarn ("extra qualification `%T::' on member `%s' ignored",
7240 else if (TREE_CODE (type) == FUNCTION_TYPE)
7242 tree sname = TREE_OPERAND (declarator->u.id.name, 1);
7244 if (TREE_CODE (sname) == IDENTIFIER_NODE
7245 && NEW_DELETE_OPNAME_P (sname))
7246 /* Overloaded operator new and operator delete
7247 are always static functions. */
7249 else if (current_class_type == NULL_TREE || friendp)
7251 = build_method_type_directly (ctype,
7253 TYPE_ARG_TYPES (type));
7256 error ("cannot declare member function `%T::%s' within `%T'",
7257 ctype, name, current_class_type);
7258 return error_mark_node;
7261 else if (declspecs->specs[(int)ds_typedef]
7262 || COMPLETE_TYPE_P (complete_type (ctype)))
7264 /* Have to move this code elsewhere in this function.
7265 this code is used for i.e., typedef int A::M; M *pm;
7267 It is? How? jason 10/2/94 */
7269 if (current_class_type)
7271 error ("cannot declare member `%T::%s' within `%T'",
7272 ctype, name, current_class_type);
7273 return void_type_node;
7278 cxx_incomplete_type_error (NULL_TREE, ctype);
7279 return error_mark_node;
7286 *attrlist = chainon (returned_attrs, *attrlist);
7288 attrlist = &returned_attrs;
7291 /* Now TYPE has the actual type. */
7293 /* Did array size calculations overflow? */
7295 if (TREE_CODE (type) == ARRAY_TYPE
7296 && COMPLETE_TYPE_P (type)
7297 && TREE_OVERFLOW (TYPE_SIZE (type)))
7299 error ("size of array `%s' is too large", name);
7300 /* If we proceed with the array type as it is, we'll eventually
7301 crash in tree_low_cst(). */
7302 type = error_mark_node;
7305 if ((decl_context == FIELD || decl_context == PARM)
7306 && !processing_template_decl
7307 && variably_modified_type_p (type, NULL_TREE))
7309 if (decl_context == FIELD)
7310 error ("data member may not have variably modified type `%T'", type);
7312 error ("parameter may not have variably modified type `%T'", type);
7313 type = error_mark_node;
7316 if (explicitp == 1 || (explicitp && friendp))
7318 /* [dcl.fct.spec] The explicit specifier shall only be used in
7319 declarations of constructors within a class definition. */
7320 error ("only declarations of constructors can be `explicit'");
7324 if (storage_class == sc_mutable)
7326 if (decl_context != FIELD || friendp)
7328 error ("non-member `%s' cannot be declared `mutable'", name);
7329 storage_class = sc_none;
7331 else if (decl_context == TYPENAME || declspecs->specs[(int)ds_typedef])
7333 error ("non-object member `%s' cannot be declared `mutable'", name);
7334 storage_class = sc_none;
7336 else if (TREE_CODE (type) == FUNCTION_TYPE
7337 || TREE_CODE (type) == METHOD_TYPE)
7339 error ("function `%s' cannot be declared `mutable'", name);
7340 storage_class = sc_none;
7344 error ("static `%s' cannot be declared `mutable'", name);
7345 storage_class = sc_none;
7347 else if (type_quals & TYPE_QUAL_CONST)
7349 error ("const `%s' cannot be declared `mutable'", name);
7350 storage_class = sc_none;
7354 /* If this is declaring a typedef name, return a TYPE_DECL. */
7355 if (declspecs->specs[(int)ds_typedef] && decl_context != TYPENAME)
7359 /* Note that the grammar rejects storage classes
7360 in typenames, fields or parameters. */
7361 if (current_lang_name == lang_name_java)
7362 TYPE_FOR_JAVA (type) = 1;
7364 if (decl_context == FIELD)
7366 if (constructor_name_p (unqualified_id, current_class_type))
7367 pedwarn ("ISO C++ forbids nested type `%D' with same name as enclosing class",
7369 decl = build_lang_decl (TYPE_DECL, unqualified_id, type);
7373 decl = build_decl (TYPE_DECL, unqualified_id, type);
7374 if (in_namespace || ctype)
7375 error ("%Jtypedef name may not be a nested-name-specifier", decl);
7376 if (!current_function_decl)
7377 DECL_CONTEXT (decl) = FROB_CONTEXT (current_namespace);
7380 /* If the user declares "typedef struct {...} foo" then the
7381 struct will have an anonymous name. Fill that name in now.
7382 Nothing can refer to it, so nothing needs know about the name
7384 if (type != error_mark_node
7387 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
7388 && TYPE_ANONYMOUS_P (type)
7389 /* Don't do this if there are attributes. */
7390 && (!attrlist || !*attrlist)
7391 && cp_type_quals (type) == TYPE_UNQUALIFIED)
7393 tree oldname = TYPE_NAME (type);
7396 /* Replace the anonymous name with the real name everywhere. */
7397 lookup_tag_reverse (type, unqualified_id);
7398 for (t = TYPE_MAIN_VARIANT (type); t; t = TYPE_NEXT_VARIANT (t))
7399 if (TYPE_NAME (t) == oldname)
7400 TYPE_NAME (t) = decl;
7402 if (TYPE_LANG_SPECIFIC (type))
7403 TYPE_WAS_ANONYMOUS (type) = 1;
7405 /* If this is a typedef within a template class, the nested
7406 type is a (non-primary) template. The name for the
7407 template needs updating as well. */
7408 if (TYPE_LANG_SPECIFIC (type) && CLASSTYPE_TEMPLATE_INFO (type))
7409 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type))
7410 = TYPE_IDENTIFIER (type);
7412 /* FIXME remangle member functions; member functions of a
7413 type with external linkage have external linkage. */
7418 if (ctype == NULL_TREE)
7420 if (TREE_CODE (type) != METHOD_TYPE)
7421 error ("%Jinvalid type qualifier for non-member function type",
7424 ctype = TYPE_METHOD_BASETYPE (type);
7426 if (ctype != NULL_TREE)
7427 grok_method_quals (ctype, decl, quals);
7431 || (typedef_decl && C_TYPEDEF_EXPLICITLY_SIGNED (typedef_decl)))
7432 C_TYPEDEF_EXPLICITLY_SIGNED (decl) = 1;
7434 bad_specifiers (decl, "type", virtualp, quals != TYPE_UNQUALIFIED,
7435 inlinep, friendp, raises != NULL_TREE);
7440 /* Detect the case of an array type of unspecified size
7441 which came, as such, direct from a typedef name.
7442 We must copy the type, so that the array's domain can be
7443 individually set by the object's initializer. */
7445 if (type && typedef_type
7446 && TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type)
7447 && TYPE_MAIN_VARIANT (type) == TYPE_MAIN_VARIANT (typedef_type))
7448 type = build_cplus_array_type (TREE_TYPE (type), NULL_TREE);
7450 /* Detect where we're using a typedef of function type to declare a
7451 function. PARMS will not be set, so we must create it now. */
7453 if (type == typedef_type && TREE_CODE (type) == FUNCTION_TYPE)
7455 tree decls = NULL_TREE;
7458 for (args = TYPE_ARG_TYPES (type); args; args = TREE_CHAIN (args))
7460 tree decl = cp_build_parm_decl (NULL_TREE, TREE_VALUE (args));
7462 TREE_CHAIN (decl) = decls;
7466 parms = nreverse (decls);
7469 /* If this is a type name (such as, in a cast or sizeof),
7470 compute the type and return it now. */
7472 if (decl_context == TYPENAME)
7474 /* Note that the grammar rejects storage classes
7475 in typenames, fields or parameters. */
7476 if (type_quals != TYPE_UNQUALIFIED)
7477 type_quals = TYPE_UNQUALIFIED;
7479 /* Special case: "friend class foo" looks like a TYPENAME context. */
7482 if (type_quals != TYPE_UNQUALIFIED)
7484 error ("type qualifiers specified for friend class declaration");
7485 type_quals = TYPE_UNQUALIFIED;
7489 error ("`inline' specified for friend class declaration");
7495 /* Don't allow friend declaration without a class-key. */
7496 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
7497 pedwarn ("template parameters cannot be friends");
7498 else if (TREE_CODE (type) == TYPENAME_TYPE)
7499 pedwarn ("friend declaration requires class-key, "
7500 "i.e. `friend class %T::%D'",
7501 TYPE_CONTEXT (type), TYPENAME_TYPE_FULLNAME (type));
7503 pedwarn ("friend declaration requires class-key, "
7504 "i.e. `friend %#T'",
7508 /* Only try to do this stuff if we didn't already give up. */
7509 if (type != integer_type_node)
7511 /* A friendly class? */
7512 if (current_class_type)
7513 make_friend_class (current_class_type, TYPE_MAIN_VARIANT (type),
7516 error ("trying to make class `%T' a friend of global scope",
7519 type = void_type_node;
7524 if (ctype == NULL_TREE)
7526 if (TREE_CODE (type) != METHOD_TYPE)
7527 error ("invalid qualifiers on non-member function type");
7529 ctype = TYPE_METHOD_BASETYPE (type);
7533 tree dummy = build_decl (TYPE_DECL, unqualified_id, type);
7534 grok_method_quals (ctype, dummy, quals);
7535 type = TREE_TYPE (dummy);
7541 else if (unqualified_id == NULL_TREE && decl_context != PARM
7542 && decl_context != CATCHPARM
7543 && TREE_CODE (type) != UNION_TYPE
7546 error ("abstract declarator `%T' used as declaration", type);
7547 unqualified_id = make_anon_name ();
7550 /* `void' at top level (not within pointer)
7551 is allowed only in typedefs or type names.
7552 We don't complain about parms either, but that is because
7553 a better error message can be made later. */
7555 if (TREE_CODE (type) == VOID_TYPE && decl_context != PARM)
7557 if (! unqualified_id)
7558 error ("unnamed variable or field declared void");
7559 else if (TREE_CODE (unqualified_id) == IDENTIFIER_NODE)
7561 if (IDENTIFIER_OPNAME_P (unqualified_id))
7564 error ("variable or field `%s' declared void", name);
7567 error ("variable or field declared void");
7568 type = integer_type_node;
7571 /* Now create the decl, which may be a VAR_DECL, a PARM_DECL
7572 or a FUNCTION_DECL, depending on DECL_CONTEXT and TYPE. */
7574 if (decl_context == PARM || decl_context == CATCHPARM)
7576 if (ctype || in_namespace)
7577 error ("cannot use `::' in parameter declaration");
7579 /* A parameter declared as an array of T is really a pointer to T.
7580 One declared as a function is really a pointer to a function.
7581 One declared as a member is really a pointer to member. */
7583 if (TREE_CODE (type) == ARRAY_TYPE)
7585 /* Transfer const-ness of array into that of type pointed to. */
7586 type = build_pointer_type (TREE_TYPE (type));
7587 type_quals = TYPE_UNQUALIFIED;
7589 else if (TREE_CODE (type) == FUNCTION_TYPE)
7590 type = build_pointer_type (type);
7596 if (decl_context == PARM)
7598 decl = cp_build_parm_decl (unqualified_id, type);
7600 bad_specifiers (decl, "parameter", virtualp, quals != TYPE_UNQUALIFIED,
7601 inlinep, friendp, raises != NULL_TREE);
7603 else if (decl_context == FIELD)
7605 /* The C99 flexible array extension. */
7606 if (!staticp && TREE_CODE (type) == ARRAY_TYPE
7607 && TYPE_DOMAIN (type) == NULL_TREE)
7609 tree itype = compute_array_index_type (dname, integer_zero_node);
7610 type = build_cplus_array_type (TREE_TYPE (type), itype);
7613 if (type == error_mark_node)
7615 /* Happens when declaring arrays of sizes which
7616 are error_mark_node, for example. */
7619 else if (in_namespace && !friendp)
7621 /* Something like struct S { int N::j; }; */
7622 error ("invalid use of `::'");
7625 else if (TREE_CODE (type) == FUNCTION_TYPE)
7628 tree function_context;
7630 /* We catch the others as conflicts with the builtin
7632 if (friendp && unqualified_id == ridpointers[(int) RID_SIGNED])
7634 error ("function `%D' cannot be declared friend",
7641 if (ctype == NULL_TREE)
7642 ctype = current_class_type;
7644 if (ctype == NULL_TREE)
7646 error ("can't make `%D' into a method -- not in a class",
7648 return void_type_node;
7651 /* ``A union may [ ... ] not [ have ] virtual functions.''
7653 if (virtualp && TREE_CODE (ctype) == UNION_TYPE)
7655 error ("function `%D' declared virtual inside a union",
7657 return void_type_node;
7660 if (NEW_DELETE_OPNAME_P (unqualified_id))
7664 error ("`%D' cannot be declared virtual, since it is always static",
7669 else if (staticp < 2)
7670 type = build_method_type_directly (ctype,
7672 TYPE_ARG_TYPES (type));
7675 /* Tell grokfndecl if it needs to set TREE_PUBLIC on the node. */
7676 function_context = (ctype != NULL_TREE) ?
7677 decl_function_context (TYPE_MAIN_DECL (ctype)) : NULL_TREE;
7678 publicp = (! friendp || ! staticp)
7679 && function_context == NULL_TREE;
7680 decl = grokfndecl (ctype, type,
7681 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
7682 ? unqualified_id : dname,
7685 virtualp, flags, quals, raises,
7686 friendp ? -1 : 0, friendp, publicp, inlinep,
7687 funcdef_flag, template_count, in_namespace);
7688 if (decl == NULL_TREE)
7691 /* This clobbers the attrs stored in `decl' from `attrlist'. */
7692 /* The decl and setting of decl_attr is also turned off. */
7693 decl = build_decl_attribute_variant (decl, decl_attr);
7696 /* [class.conv.ctor]
7698 A constructor declared without the function-specifier
7699 explicit that can be called with a single parameter
7700 specifies a conversion from the type of its first
7701 parameter to the type of its class. Such a constructor
7702 is called a converting constructor. */
7704 DECL_NONCONVERTING_P (decl) = 1;
7705 else if (DECL_CONSTRUCTOR_P (decl))
7707 /* The constructor can be called with exactly one
7708 parameter if there is at least one parameter, and
7709 any subsequent parameters have default arguments.
7710 Ignore any compiler-added parms. */
7711 tree arg_types = FUNCTION_FIRST_USER_PARMTYPE (decl);
7713 if (arg_types == void_list_node
7715 && TREE_CHAIN (arg_types)
7716 && TREE_CHAIN (arg_types) != void_list_node
7717 && !TREE_PURPOSE (TREE_CHAIN (arg_types))))
7718 DECL_NONCONVERTING_P (decl) = 1;
7721 else if (TREE_CODE (type) == METHOD_TYPE)
7723 /* We only get here for friend declarations of
7724 members of other classes. */
7725 /* All method decls are public, so tell grokfndecl to set
7726 TREE_PUBLIC, also. */
7727 decl = grokfndecl (ctype, type,
7728 TREE_CODE (unqualified_id) != TEMPLATE_ID_EXPR
7729 ? unqualified_id : dname,
7732 virtualp, flags, quals, raises,
7733 friendp ? -1 : 0, friendp, 1, 0, funcdef_flag,
7734 template_count, in_namespace);
7735 if (decl == NULL_TREE)
7738 else if (!staticp && !dependent_type_p (type)
7739 && !COMPLETE_TYPE_P (complete_type (type))
7740 && (TREE_CODE (type) != ARRAY_TYPE || initialized == 0))
7743 error ("field `%D' has incomplete type", unqualified_id);
7745 error ("name `%T' has incomplete type", type);
7747 /* If we're instantiating a template, tell them which
7748 instantiation made the field's type be incomplete. */
7749 if (current_class_type
7750 && TYPE_NAME (current_class_type)
7751 && IDENTIFIER_TEMPLATE (TYPE_IDENTIFIER (current_class_type))
7753 && declspecs->type == type)
7754 error (" in instantiation of template `%T'",
7755 current_class_type);
7757 type = error_mark_node;
7764 error ("`%E' is neither function nor member function; "
7765 "cannot be declared friend", unqualified_id);
7773 /* Friends are treated specially. */
7774 if (ctype == current_class_type)
7775 warning ("member functions are implicitly friends of their class");
7776 else if (decl && DECL_NAME (decl))
7778 if (template_class_depth (current_class_type) == 0)
7780 decl = check_explicit_specialization
7781 (unqualified_id, decl, template_count,
7782 2 * (funcdef_flag != 0) + 4);
7783 if (decl == error_mark_node)
7784 return error_mark_node;
7787 decl = do_friend (ctype, unqualified_id, decl,
7788 *attrlist, flags, quals, funcdef_flag);
7792 return void_type_node;
7795 /* Structure field. It may not be a function, except for C++. */
7797 if (decl == NULL_TREE)
7803 /* An attempt is being made to initialize a non-static
7804 member. But, from [class.mem]:
7806 4 A member-declarator can contain a
7807 constant-initializer only if it declares a static
7808 member (_class.static_) of integral or enumeration
7809 type, see _class.static.data_.
7811 This used to be relatively common practice, but
7812 the rest of the compiler does not correctly
7813 handle the initialization unless the member is
7814 static so we make it static below. */
7815 pedwarn ("ISO C++ forbids initialization of member `%D'",
7817 pedwarn ("making `%D' static", unqualified_id);
7821 if (uses_template_parms (type))
7822 /* We'll check at instantiation time. */
7824 else if (check_static_variable_definition (unqualified_id,
7826 /* If we just return the declaration, crashes
7827 will sometimes occur. We therefore return
7828 void_type_node, as if this was a friend
7829 declaration, to cause callers to completely
7830 ignore this declaration. */
7831 return void_type_node;
7836 /* C++ allows static class members. All other work
7837 for this is done by grokfield. */
7838 decl = build_lang_decl (VAR_DECL, unqualified_id, type);
7839 TREE_STATIC (decl) = 1;
7840 /* In class context, 'static' means public access. */
7841 TREE_PUBLIC (decl) = DECL_EXTERNAL (decl) = 1;
7845 decl = build_decl (FIELD_DECL, unqualified_id, type);
7846 DECL_NONADDRESSABLE_P (decl) = bitfield;
7847 if (storage_class == sc_mutable)
7849 DECL_MUTABLE_P (decl) = 1;
7850 storage_class = sc_none;
7854 bad_specifiers (decl, "field", virtualp, quals != TYPE_UNQUALIFIED,
7855 inlinep, friendp, raises != NULL_TREE);
7858 else if (TREE_CODE (type) == FUNCTION_TYPE
7859 || TREE_CODE (type) == METHOD_TYPE)
7864 if (!unqualified_id)
7867 if (TREE_CODE (unqualified_id) == TEMPLATE_ID_EXPR)
7868 original_name = dname;
7870 original_name = unqualified_id;
7872 if (storage_class == sc_auto)
7873 error ("storage class `auto' invalid for function `%s'", name);
7874 else if (storage_class == sc_register)
7875 error ("storage class `register' invalid for function `%s'", name);
7877 error ("storage class `__thread' invalid for function `%s'", name);
7879 /* Function declaration not at top level.
7880 Storage classes other than `extern' are not allowed
7881 and `extern' makes no difference. */
7882 if (! toplevel_bindings_p ()
7883 && (storage_class == sc_static
7884 || declspecs->specs[(int)ds_inline])
7887 if (storage_class == sc_static)
7888 pedwarn ("`static' specified invalid for function `%s' declared out of global scope", name);
7890 pedwarn ("`inline' specifier invalid for function `%s' declared out of global scope", name);
7893 if (ctype == NULL_TREE)
7897 error ("virtual non-class function `%s'", name);
7901 else if (TREE_CODE (type) == FUNCTION_TYPE && staticp < 2
7902 && !NEW_DELETE_OPNAME_P (original_name))
7903 type = build_method_type_directly (ctype,
7905 TYPE_ARG_TYPES (type));
7907 /* Record presence of `static'. */
7908 publicp = (ctype != NULL_TREE
7909 || storage_class == sc_extern
7910 || storage_class != sc_static);
7912 decl = grokfndecl (ctype, type, original_name, parms, unqualified_id,
7913 virtualp, flags, quals, raises,
7915 publicp, inlinep, funcdef_flag,
7916 template_count, in_namespace);
7917 if (decl == NULL_TREE)
7922 int invalid_static = 0;
7924 /* Don't allow a static member function in a class, and forbid
7925 declaring main to be static. */
7926 if (TREE_CODE (type) == METHOD_TYPE)
7928 pedwarn ("cannot declare member function `%D' to have static linkage", decl);
7931 else if (current_function_decl)
7933 /* FIXME need arm citation */
7934 error ("cannot declare static function inside another function");
7941 storage_class = sc_none;
7947 /* It's a variable. */
7949 /* An uninitialized decl with `extern' is a reference. */
7950 decl = grokvardecl (type, unqualified_id,
7953 (type_quals & TYPE_QUAL_CONST) != 0,
7954 ctype ? ctype : in_namespace);
7955 bad_specifiers (decl, "variable", virtualp, quals != TYPE_UNQUALIFIED,
7956 inlinep, friendp, raises != NULL_TREE);
7960 DECL_CONTEXT (decl) = ctype;
7963 pedwarn ("`static' may not be used when defining (as opposed to declaring) a static data member");
7965 storage_class = sc_none;
7967 if (storage_class == sc_register && TREE_STATIC (decl))
7969 error ("static member `%D' declared `register'", decl);
7970 storage_class = sc_none;
7972 if (storage_class == sc_extern && pedantic)
7974 pedwarn ("cannot explicitly declare member `%#D' to have extern linkage",
7976 storage_class = sc_none;
7981 /* Record `register' declaration for warnings on &
7982 and in case doing stupid register allocation. */
7984 if (storage_class == sc_register)
7985 DECL_REGISTER (decl) = 1;
7986 else if (storage_class == sc_extern)
7987 DECL_THIS_EXTERN (decl) = 1;
7988 else if (storage_class == sc_static)
7989 DECL_THIS_STATIC (decl) = 1;
7991 /* Record constancy and volatility. There's no need to do this
7992 when processing a template; we'll do this for the instantiated
7993 declaration based on the type of DECL. */
7994 if (!processing_template_decl)
7995 c_apply_type_quals_to_decl (type_quals, decl);
8001 /* Subroutine of start_function. Ensure that each of the parameter
8002 types (as listed in PARMS) is complete, as is required for a
8003 function definition. */
8006 require_complete_types_for_parms (tree parms)
8008 for (; parms; parms = TREE_CHAIN (parms))
8010 if (VOID_TYPE_P (TREE_TYPE (parms)))
8011 /* grokparms will have already issued an error. */
8012 TREE_TYPE (parms) = error_mark_node;
8013 else if (complete_type_or_else (TREE_TYPE (parms), parms))
8015 layout_decl (parms, 0);
8016 DECL_ARG_TYPE (parms) = type_passed_as (TREE_TYPE (parms));
8021 /* Returns nonzero if T is a local variable. */
8024 local_variable_p (tree t)
8026 if ((TREE_CODE (t) == VAR_DECL
8027 /* A VAR_DECL with a context that is a _TYPE is a static data
8029 && !TYPE_P (CP_DECL_CONTEXT (t))
8030 /* Any other non-local variable must be at namespace scope. */
8031 && !DECL_NAMESPACE_SCOPE_P (t))
8032 || (TREE_CODE (t) == PARM_DECL))
8038 /* Returns nonzero if T is an automatic local variable or a label.
8039 (These are the declarations that need to be remapped when the code
8040 containing them is duplicated.) */
8043 nonstatic_local_decl_p (tree t)
8045 return ((local_variable_p (t) && !TREE_STATIC (t))
8046 || TREE_CODE (t) == LABEL_DECL
8047 || TREE_CODE (t) == RESULT_DECL);
8050 /* Like local_variable_p, but suitable for use as a tree-walking
8054 local_variable_p_walkfn (tree *tp, int *walk_subtrees,
8055 void *data ATTRIBUTE_UNUSED)
8057 if (local_variable_p (*tp) && !DECL_ARTIFICIAL (*tp))
8059 else if (TYPE_P (*tp))
8066 /* Check that ARG, which is a default-argument expression for a
8067 parameter DECL, is valid. Returns ARG, or ERROR_MARK_NODE, if
8068 something goes wrong. DECL may also be a _TYPE node, rather than a
8069 DECL, if there is no DECL available. */
8072 check_default_argument (tree decl, tree arg)
8077 if (TREE_CODE (arg) == DEFAULT_ARG)
8078 /* We get a DEFAULT_ARG when looking at an in-class declaration
8079 with a default argument. Ignore the argument for now; we'll
8080 deal with it after the class is complete. */
8083 if (processing_template_decl || uses_template_parms (arg))
8084 /* We don't do anything checking until instantiation-time. Note
8085 that there may be uninstantiated arguments even for an
8086 instantiated function, since default arguments are not
8087 instantiated until they are needed. */
8096 decl_type = TREE_TYPE (decl);
8098 if (arg == error_mark_node
8099 || decl == error_mark_node
8100 || TREE_TYPE (arg) == error_mark_node
8101 || decl_type == error_mark_node)
8102 /* Something already went wrong. There's no need to check
8104 return error_mark_node;
8106 /* [dcl.fct.default]
8108 A default argument expression is implicitly converted to the
8110 if (!TREE_TYPE (arg)
8111 || !can_convert_arg (decl_type, TREE_TYPE (arg), arg))
8114 error ("default argument for `%#D' has type `%T'",
8115 decl, TREE_TYPE (arg));
8117 error ("default argument for parameter of type `%T' has type `%T'",
8118 decl_type, TREE_TYPE (arg));
8120 return error_mark_node;
8123 /* [dcl.fct.default]
8125 Local variables shall not be used in default argument
8128 The keyword `this' shall not be used in a default argument of a
8130 var = walk_tree_without_duplicates (&arg, local_variable_p_walkfn,
8134 error ("default argument `%E' uses local variable `%D'",
8136 return error_mark_node;
8143 /* Decode the list of parameter types for a function type.
8144 Given the list of things declared inside the parens,
8145 return a list of types.
8147 If this parameter does not end with an ellipsis, we append
8150 *PARMS is set to the chain of PARM_DECLs created. */
8153 grokparms (cp_parameter_declarator *first_parm, tree *parms)
8155 tree result = NULL_TREE;
8156 tree decls = NULL_TREE;
8157 int ellipsis = !first_parm || first_parm->ellipsis_p;
8158 cp_parameter_declarator *parm;
8161 for (parm = first_parm; parm != NULL; parm = parm->next)
8163 tree type = NULL_TREE;
8164 tree init = parm->default_argument;
8168 if (parm == no_parameters)
8171 attrs = parm->decl_specifiers.attributes;
8172 parm->decl_specifiers.attributes = NULL_TREE;
8173 decl = grokdeclarator (parm->declarator, &parm->decl_specifiers,
8174 PARM, init != NULL_TREE, &attrs);
8175 if (! decl || TREE_TYPE (decl) == error_mark_node)
8179 cplus_decl_attributes (&decl, attrs, 0);
8181 type = TREE_TYPE (decl);
8182 if (VOID_TYPE_P (type))
8184 if (same_type_p (type, void_type_node)
8185 && !DECL_NAME (decl) && !result && !parm->next && !ellipsis)
8186 /* this is a parmlist of `(void)', which is ok. */
8188 cxx_incomplete_type_error (decl, type);
8189 /* It's not a good idea to actually create parameters of
8190 type `void'; other parts of the compiler assume that a
8191 void type terminates the parameter list. */
8192 type = error_mark_node;
8193 TREE_TYPE (decl) = error_mark_node;
8196 if (type != error_mark_node)
8198 /* Top-level qualifiers on the parameters are
8199 ignored for function types. */
8200 type = cp_build_qualified_type (type, 0);
8201 if (TREE_CODE (type) == METHOD_TYPE)
8203 error ("parameter `%D' invalidly declared method type", decl);
8204 type = build_pointer_type (type);
8205 TREE_TYPE (decl) = type;
8207 else if (abstract_virtuals_error (decl, type))
8208 any_error = 1; /* Seems like a good idea. */
8209 else if (POINTER_TYPE_P (type))
8211 /* [dcl.fct]/6, parameter types cannot contain pointers
8212 (references) to arrays of unknown bound. */
8213 tree t = TREE_TYPE (type);
8214 int ptr = TYPE_PTR_P (type);
8220 else if (TREE_CODE (t) != ARRAY_TYPE)
8222 else if (!TYPE_DOMAIN (t))
8226 if (TREE_CODE (t) == ARRAY_TYPE)
8227 error ("parameter `%D' includes %s to array of unknown bound `%T'",
8228 decl, ptr ? "pointer" : "reference", t);
8231 if (!any_error && init)
8232 init = check_default_argument (decl, init);
8237 TREE_CHAIN (decl) = decls;
8239 result = tree_cons (init, type, result);
8241 decls = nreverse (decls);
8242 result = nreverse (result);
8244 result = chainon (result, void_list_node);
8251 /* D is a constructor or overloaded `operator='.
8253 Let T be the class in which D is declared. Then, this function
8256 -1 if D's is an ill-formed constructor or copy assignment operator
8257 whose first parameter is of type `T'.
8258 0 if D is not a copy constructor or copy assignment
8260 1 if D is a copy constructor or copy assignment operator whose
8261 first parameter is a reference to const qualified T.
8262 2 if D is a copy constructor or copy assignment operator whose
8263 first parameter is a reference to non-const qualified T.
8265 This function can be used as a predicate. Positive values indicate
8266 a copy constructor and nonzero values indicate a copy assignment
8276 my_friendly_assert (DECL_FUNCTION_MEMBER_P (d), 20011208);
8278 if (DECL_TEMPLATE_INFO (d) && is_member_template (DECL_TI_TEMPLATE (d)))
8279 /* Instantiations of template member functions are never copy
8280 functions. Note that member functions of templated classes are
8281 represented as template functions internally, and we must
8282 accept those as copy functions. */
8285 args = FUNCTION_FIRST_USER_PARMTYPE (d);
8289 arg_type = TREE_VALUE (args);
8291 if (TYPE_MAIN_VARIANT (arg_type) == DECL_CONTEXT (d))
8293 /* Pass by value copy assignment operator. */
8296 else if (TREE_CODE (arg_type) == REFERENCE_TYPE
8297 && TYPE_MAIN_VARIANT (TREE_TYPE (arg_type)) == DECL_CONTEXT (d))
8299 if (CP_TYPE_CONST_P (TREE_TYPE (arg_type)))
8305 args = TREE_CHAIN (args);
8307 if (args && args != void_list_node && !TREE_PURPOSE (args))
8308 /* There are more non-optional args. */
8314 /* Remember any special properties of member function DECL. */
8316 void grok_special_member_properties (tree decl)
8318 if (!DECL_NONSTATIC_MEMBER_FUNCTION_P(decl))
8319 ; /* Not special. */
8320 else if (DECL_CONSTRUCTOR_P (decl))
8322 int ctor = copy_fn_p (decl);
8328 A non-template constructor for class X is a copy
8329 constructor if its first parameter is of type X&, const
8330 X&, volatile X& or const volatile X&, and either there
8331 are no other parameters or else all other parameters have
8332 default arguments. */
8333 TYPE_HAS_INIT_REF (DECL_CONTEXT (decl)) = 1;
8335 TYPE_HAS_CONST_INIT_REF (DECL_CONTEXT (decl)) = 1;
8337 else if (sufficient_parms_p (FUNCTION_FIRST_USER_PARMTYPE (decl)))
8338 TYPE_HAS_DEFAULT_CONSTRUCTOR (DECL_CONTEXT (decl)) = 1;
8340 else if (DECL_OVERLOADED_OPERATOR_P (decl) == NOP_EXPR)
8344 A non-template assignment operator for class X is a copy
8345 assignment operator if its parameter is of type X, X&, const
8346 X&, volatile X& or const volatile X&. */
8348 int assop = copy_fn_p (decl);
8352 TYPE_HAS_ASSIGN_REF (DECL_CONTEXT (decl)) = 1;
8354 TYPE_HAS_CONST_ASSIGN_REF (DECL_CONTEXT (decl)) = 1;
8359 /* Check a constructor DECL has the correct form. Complains
8360 if the class has a constructor of the form X(X). */
8363 grok_ctor_properties (tree ctype, tree decl)
8365 int ctor_parm = copy_fn_p (decl);
8371 A declaration of a constructor for a class X is ill-formed if
8372 its first parameter is of type (optionally cv-qualified) X
8373 and either there are no other parameters or else all other
8374 parameters have default arguments.
8376 We *don't* complain about member template instantiations that
8377 have this form, though; they can occur as we try to decide
8378 what constructor to use during overload resolution. Since
8379 overload resolution will never prefer such a constructor to
8380 the non-template copy constructor (which is either explicitly
8381 or implicitly defined), there's no need to worry about their
8382 existence. Theoretically, they should never even be
8383 instantiated, but that's hard to forestall. */
8384 error ("invalid constructor; you probably meant `%T (const %T&)'",
8392 /* An operator with this code is unary, but can also be binary. */
8395 ambi_op_p (enum tree_code code)
8397 return (code == INDIRECT_REF
8398 || code == ADDR_EXPR
8399 || code == CONVERT_EXPR
8400 || code == NEGATE_EXPR
8401 || code == PREINCREMENT_EXPR
8402 || code == PREDECREMENT_EXPR);
8405 /* An operator with this name can only be unary. */
8408 unary_op_p (enum tree_code code)
8410 return (code == TRUTH_NOT_EXPR
8411 || code == BIT_NOT_EXPR
8412 || code == COMPONENT_REF
8413 || code == TYPE_EXPR);
8416 /* DECL is a declaration for an overloaded operator. Returns true if
8417 the declaration is valid; false otherwise. If COMPLAIN is true,
8418 errors are issued for invalid declarations. */
8421 grok_op_properties (tree decl, int friendp, bool complain)
8423 tree argtypes = TYPE_ARG_TYPES (TREE_TYPE (decl));
8425 int methodp = (TREE_CODE (TREE_TYPE (decl)) == METHOD_TYPE);
8426 tree name = DECL_NAME (decl);
8427 enum tree_code operator_code;
8431 /* Assume that the declaration is valid. */
8434 /* Count the number of arguments. */
8435 for (argtype = argtypes, arity = 0;
8436 argtype && argtype != void_list_node;
8437 argtype = TREE_CHAIN (argtype))
8440 if (current_class_type == NULL_TREE)
8443 if (DECL_CONV_FN_P (decl))
8444 operator_code = TYPE_EXPR;
8448 #define DEF_OPERATOR(NAME, CODE, MANGLING, ARITY, ASSN_P) \
8449 if (ansi_opname (CODE) == name) \
8451 operator_code = (CODE); \
8454 else if (ansi_assopname (CODE) == name) \
8456 operator_code = (CODE); \
8457 DECL_ASSIGNMENT_OPERATOR_P (decl) = 1; \
8461 #include "operators.def"
8467 my_friendly_assert (operator_code != LAST_CPLUS_TREE_CODE, 20000526);
8468 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
8472 switch (operator_code)
8475 TYPE_HAS_NEW_OPERATOR (current_class_type) = 1;
8479 TYPE_GETS_DELETE (current_class_type) |= 1;
8483 TYPE_HAS_ARRAY_NEW_OPERATOR (current_class_type) = 1;
8486 case VEC_DELETE_EXPR:
8487 TYPE_GETS_DELETE (current_class_type) |= 2;
8495 /* [basic.std.dynamic.allocation]/1:
8497 A program is ill-formed if an allocation function is declared
8498 in a namespace scope other than global scope or declared static
8501 The same also holds true for deallocation functions. */
8502 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR
8503 || operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
8505 if (DECL_NAMESPACE_SCOPE_P (decl))
8507 if (CP_DECL_CONTEXT (decl) != global_namespace)
8508 error ("`%D' may not be declared within a namespace", decl);
8509 else if (!TREE_PUBLIC (decl))
8510 error ("`%D' may not be declared as static", decl);
8514 if (operator_code == NEW_EXPR || operator_code == VEC_NEW_EXPR)
8515 TREE_TYPE (decl) = coerce_new_type (TREE_TYPE (decl));
8516 else if (operator_code == DELETE_EXPR || operator_code == VEC_DELETE_EXPR)
8517 TREE_TYPE (decl) = coerce_delete_type (TREE_TYPE (decl));
8520 /* An operator function must either be a non-static member function
8521 or have at least one parameter of a class, a reference to a class,
8522 an enumeration, or a reference to an enumeration. 13.4.0.6 */
8523 if (! methodp || DECL_STATIC_FUNCTION_P (decl))
8525 if (operator_code == TYPE_EXPR
8526 || operator_code == CALL_EXPR
8527 || operator_code == COMPONENT_REF
8528 || operator_code == ARRAY_REF
8529 || operator_code == NOP_EXPR)
8530 error ("`%D' must be a nonstatic member function", decl);
8535 if (DECL_STATIC_FUNCTION_P (decl))
8536 error ("`%D' must be either a non-static member function or a non-member function", decl);
8538 for (p = argtypes; p && p != void_list_node; p = TREE_CHAIN (p))
8540 tree arg = non_reference (TREE_VALUE (p));
8541 /* IS_AGGR_TYPE, rather than CLASS_TYPE_P, is used
8542 because these checks are performed even on
8543 template functions. */
8544 if (IS_AGGR_TYPE (arg) || TREE_CODE (arg) == ENUMERAL_TYPE)
8548 if (!p || p == void_list_node)
8553 error ("`%D' must have an argument of class or "
8561 /* There are no restrictions on the arguments to an overloaded
8563 if (operator_code == CALL_EXPR)
8566 if (IDENTIFIER_TYPENAME_P (name) && ! DECL_TEMPLATE_INFO (decl))
8568 tree t = TREE_TYPE (name);
8571 int ref = (TREE_CODE (t) == REFERENCE_TYPE);
8572 const char *what = 0;
8575 t = TYPE_MAIN_VARIANT (TREE_TYPE (t));
8577 if (TREE_CODE (t) == VOID_TYPE)
8579 else if (t == current_class_type)
8580 what = "the same type";
8581 /* Don't force t to be complete here. */
8582 else if (IS_AGGR_TYPE (t)
8583 && COMPLETE_TYPE_P (t)
8584 && DERIVED_FROM_P (t, current_class_type))
8585 what = "a base class";
8587 if (what && warn_conversion)
8588 warning ("conversion to %s%s will never use a type conversion operator",
8589 ref ? "a reference to " : "", what);
8592 if (operator_code == COND_EXPR)
8595 error ("ISO C++ prohibits overloading operator ?:");
8597 else if (ambi_op_p (operator_code))
8600 /* We pick the one-argument operator codes by default, so
8601 we don't have to change anything. */
8603 else if (arity == 2)
8605 /* If we thought this was a unary operator, we now know
8606 it to be a binary operator. */
8607 switch (operator_code)
8610 operator_code = MULT_EXPR;
8614 operator_code = BIT_AND_EXPR;
8618 operator_code = PLUS_EXPR;
8622 operator_code = MINUS_EXPR;
8625 case PREINCREMENT_EXPR:
8626 operator_code = POSTINCREMENT_EXPR;
8629 case PREDECREMENT_EXPR:
8630 operator_code = POSTDECREMENT_EXPR;
8637 SET_OVERLOADED_OPERATOR_CODE (decl, operator_code);
8639 if ((operator_code == POSTINCREMENT_EXPR
8640 || operator_code == POSTDECREMENT_EXPR)
8641 && ! processing_template_decl
8642 && ! same_type_p (TREE_VALUE (TREE_CHAIN (argtypes)), integer_type_node))
8645 error ("postfix `%D' must take `int' as its argument",
8649 ("postfix `%D' must take `int' as its second argument",
8656 error ("`%D' must take either zero or one argument", decl);
8658 error ("`%D' must take either one or two arguments", decl);
8661 /* More Effective C++ rule 6. */
8663 && (operator_code == POSTINCREMENT_EXPR
8664 || operator_code == POSTDECREMENT_EXPR
8665 || operator_code == PREINCREMENT_EXPR
8666 || operator_code == PREDECREMENT_EXPR))
8668 tree arg = TREE_VALUE (argtypes);
8669 tree ret = TREE_TYPE (TREE_TYPE (decl));
8670 if (methodp || TREE_CODE (arg) == REFERENCE_TYPE)
8671 arg = TREE_TYPE (arg);
8672 arg = TYPE_MAIN_VARIANT (arg);
8673 if (operator_code == PREINCREMENT_EXPR
8674 || operator_code == PREDECREMENT_EXPR)
8676 if (TREE_CODE (ret) != REFERENCE_TYPE
8677 || !same_type_p (TYPE_MAIN_VARIANT (TREE_TYPE (ret)),
8679 warning ("prefix `%D' should return `%T'", decl,
8680 build_reference_type (arg));
8684 if (!same_type_p (TYPE_MAIN_VARIANT (ret), arg))
8685 warning ("postfix `%D' should return `%T'", decl, arg);
8689 else if (unary_op_p (operator_code))
8694 error ("`%D' must take `void'", decl);
8696 error ("`%D' must take exactly one argument", decl);
8699 else /* if (binary_op_p (operator_code)) */
8704 error ("`%D' must take exactly one argument", decl);
8706 error ("`%D' must take exactly two arguments", decl);
8709 /* More Effective C++ rule 7. */
8711 && (operator_code == TRUTH_ANDIF_EXPR
8712 || operator_code == TRUTH_ORIF_EXPR
8713 || operator_code == COMPOUND_EXPR))
8714 warning ("user-defined `%D' always evaluates both arguments",
8718 /* Effective C++ rule 23. */
8721 && !DECL_ASSIGNMENT_OPERATOR_P (decl)
8722 && (operator_code == PLUS_EXPR
8723 || operator_code == MINUS_EXPR
8724 || operator_code == TRUNC_DIV_EXPR
8725 || operator_code == MULT_EXPR
8726 || operator_code == TRUNC_MOD_EXPR)
8727 && TREE_CODE (TREE_TYPE (TREE_TYPE (decl))) == REFERENCE_TYPE)
8728 warning ("`%D' should return by value", decl);
8731 for (; argtypes && argtypes != void_list_node;
8732 argtypes = TREE_CHAIN (argtypes))
8733 if (TREE_PURPOSE (argtypes))
8735 TREE_PURPOSE (argtypes) = NULL_TREE;
8736 if (operator_code == POSTINCREMENT_EXPR
8737 || operator_code == POSTDECREMENT_EXPR)
8740 pedwarn ("`%D' cannot have default arguments", decl);
8743 error ("`%D' cannot have default arguments", decl);
8752 tag_name (enum tag_types code)
8769 /* Name lookup in an elaborated-type-specifier (after the keyword
8770 indicated by TAG_CODE) has found the TYPE_DECL DECL. If the
8771 elaborated-type-specifier is invalid, issue a diagnostic and return
8772 error_mark_node; otherwise, return the *_TYPE to which it referred.
8773 If ALLOW_TEMPLATE_P is true, TYPE may be a class template. */
8776 check_elaborated_type_specifier (enum tag_types tag_code,
8778 bool allow_template_p)
8784 struct S { struct S *p; };
8786 name lookup will find the TYPE_DECL for the implicit "S::S"
8787 typedef. Adjust for that here. */
8788 if (DECL_SELF_REFERENCE_P (decl))
8789 decl = TYPE_NAME (TREE_TYPE (decl));
8791 type = TREE_TYPE (decl);
8795 If the identifier resolves to a typedef-name or a template
8796 type-parameter, the elaborated-type-specifier is ill-formed.
8798 In other words, the only legitimate declaration to use in the
8799 elaborated type specifier is the implicit typedef created when
8800 the type is declared. */
8801 if (!DECL_IMPLICIT_TYPEDEF_P (decl))
8803 error ("using typedef-name `%D' after `%s'", decl, tag_name (tag_code));
8804 return IS_AGGR_TYPE (type) ? type : error_mark_node;
8807 if (TREE_CODE (type) == TEMPLATE_TYPE_PARM)
8809 error ("using template type parameter `%T' after `%s'",
8810 type, tag_name (tag_code));
8811 return error_mark_node;
8813 else if (TREE_CODE (type) != RECORD_TYPE
8814 && TREE_CODE (type) != UNION_TYPE
8815 && tag_code != enum_type)
8817 error ("`%T' referred to as `%s'", type, tag_name (tag_code));
8818 return error_mark_node;
8820 else if (TREE_CODE (type) != ENUMERAL_TYPE
8821 && tag_code == enum_type)
8823 error ("`%T' referred to as enum", type);
8824 return error_mark_node;
8826 else if (!allow_template_p
8827 && TREE_CODE (type) == RECORD_TYPE
8828 && CLASSTYPE_IS_TEMPLATE (type))
8830 /* If a class template appears as elaborated type specifier
8831 without a template header such as:
8833 template <class T> class C {};
8834 void f(class C); // No template header here
8836 then the required template argument is missing. */
8838 error ("template argument required for `%s %T'",
8839 tag_name (tag_code),
8840 DECL_NAME (CLASSTYPE_TI_TEMPLATE (type)));
8841 return error_mark_node;
8847 /* Get the struct, enum or union (TAG_CODE says which) with tag NAME.
8848 Define the tag as a forward-reference if it is not defined.
8850 If a declaration is given, process it here, and report an error if
8851 multiple declarations are not identical.
8853 GLOBALIZE is false when this is also a definition. Only look in
8854 the current frame for the name (since C++ allows new names in any
8857 TEMPLATE_HEADER_P is true when this declaration is preceded by
8858 a set of template parameters. */
8861 xref_tag (enum tag_types tag_code, tree name,
8862 bool globalize, bool template_header_p)
8864 enum tree_code code;
8866 struct cp_binding_level *b = current_binding_level;
8867 tree context = NULL_TREE;
8869 timevar_push (TV_NAME_LOOKUP);
8871 my_friendly_assert (TREE_CODE (name) == IDENTIFIER_NODE, 0);
8883 code = ENUMERAL_TYPE;
8891 /* If we know we are defining this tag, only look it up in
8892 this scope and don't try to find it as a type. */
8893 t = lookup_tag (code, name, b, 1);
8897 tree decl = lookup_name (name, 2);
8899 if (decl && DECL_CLASS_TEMPLATE_P (decl))
8900 decl = DECL_TEMPLATE_RESULT (decl);
8902 if (decl && TREE_CODE (decl) == TYPE_DECL)
8904 /* Two cases we need to consider when deciding if a class
8905 template is allowed as an elaborated type specifier:
8906 1. It is a self reference to its own class.
8907 2. It comes with a template header.
8911 template <class T> class C {
8912 class C *c1; // DECL_SELF_REFERENCE_P is true
8915 template <class U> class C; // template_header_p is true
8916 template <class T> class C<T>::D {
8917 class C *c2; // DECL_SELF_REFERENCE_P is true
8920 t = check_elaborated_type_specifier (tag_code,
8923 | DECL_SELF_REFERENCE_P (decl));
8924 if (t == error_mark_node)
8925 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
8930 if (t && current_class_type
8931 && template_class_depth (current_class_type)
8932 && template_header_p)
8934 /* Since GLOBALIZE is nonzero, we are not looking at a
8935 definition of this tag. Since, in addition, we are currently
8936 processing a (member) template declaration of a template
8937 class, we must be very careful; consider:
8944 { template <class V>
8945 friend struct S1; };
8947 Here, the S2::S1 declaration should not be confused with the
8948 outer declaration. In particular, the inner version should
8949 have a template parameter of level 2, not level 1. This
8950 would be particularly important if the member declaration
8953 template <class V = U> friend struct S1;
8955 say, when we should tsubst into `U' when instantiating
8956 S2. On the other hand, when presented with:
8966 we must find the inner binding eventually. We
8967 accomplish this by making sure that the new type we
8968 create to represent this declaration has the right
8970 context = TYPE_CONTEXT (t);
8977 /* If no such tag is yet defined, create a forward-reference node
8978 and record it as the "definition".
8979 When a real declaration of this type is found,
8980 the forward-reference will be altered into a real type. */
8981 if (code == ENUMERAL_TYPE)
8983 error ("use of enum `%#D' without previous declaration", name);
8984 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, error_mark_node);
8988 t = make_aggr_type (code);
8989 TYPE_CONTEXT (t) = context;
8990 pushtag (name, t, globalize);
8995 if (!globalize && processing_template_decl && IS_AGGR_TYPE (t))
8996 redeclare_class_template (t, current_template_parms);
8997 else if (!processing_template_decl
8999 && CLASSTYPE_IS_TEMPLATE (t))
9001 error ("redeclaration of `%T' as a non-template", t);
9002 t = error_mark_node;
9006 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, t);
9010 xref_tag_from_type (tree old, tree id, int globalize)
9012 enum tag_types tag_kind;
9014 if (TREE_CODE (old) == RECORD_TYPE)
9015 tag_kind = (CLASSTYPE_DECLARED_CLASS (old) ? class_type : record_type);
9017 tag_kind = union_type;
9019 if (id == NULL_TREE)
9020 id = TYPE_IDENTIFIER (old);
9022 return xref_tag (tag_kind, id, globalize, false);
9025 /* Create the binfo hierarchy for REF with (possibly NULL) base list
9026 BASE_LIST. For each element on BASE_LIST the TREE_PURPOSE is an
9027 access_* node, and the TREE_VALUE is the type of the base-class.
9028 Non-NULL TREE_TYPE indicates virtual inheritance. */
9031 xref_basetypes (tree ref, tree base_list)
9035 unsigned max_vbases = 0; /* Maxium direct & indirect virtual bases. */
9036 unsigned max_bases = 0; /* Maxium direct bases. */
9038 tree default_access;
9039 tree igo_prev; /* Track Inheritance Graph Order. */
9041 if (ref == error_mark_node)
9044 /* The base of a derived class is private by default, all others are
9046 default_access = (TREE_CODE (ref) == RECORD_TYPE
9047 && CLASSTYPE_DECLARED_CLASS (ref)
9048 ? access_private_node : access_public_node);
9050 /* First, make sure that any templates in base-classes are
9051 instantiated. This ensures that if we call ourselves recursively
9052 we do not get confused about which classes are marked and which
9057 tree basetype = TREE_VALUE (*basep);
9059 if (!(processing_template_decl && uses_template_parms (basetype))
9060 && !complete_type_or_else (basetype, NULL))
9061 /* An incomplete type. Remove it from the list. */
9062 *basep = TREE_CHAIN (*basep);
9066 if (TREE_TYPE (*basep))
9068 if (CLASS_TYPE_P (basetype))
9069 max_vbases += VEC_length (tree, CLASSTYPE_VBASECLASSES (basetype));
9070 basep = &TREE_CHAIN (*basep);
9074 SET_CLASSTYPE_MARKED (ref);
9076 /* The binfo slot should be empty, unless this is an (ill-formed)
9078 my_friendly_assert (!TYPE_BINFO (ref) || TYPE_SIZE (ref), 20040706);
9079 my_friendly_assert (TYPE_MAIN_VARIANT (ref) == ref, 20040712);
9081 binfo = make_tree_binfo (BINFO_LANG_SLOTS);
9082 TYPE_BINFO (ref) = binfo;
9083 BINFO_OFFSET (binfo) = size_zero_node;
9084 BINFO_TYPE (binfo) = ref;
9088 BINFO_BASE_BINFOS (binfo) = make_tree_vec (max_bases);
9089 BINFO_BASE_ACCESSES (binfo) = make_tree_vec (max_bases);
9090 /* An aggregate cannot have baseclasses. */
9091 CLASSTYPE_NON_AGGREGATE (ref) = 1;
9093 if (TREE_CODE (ref) == UNION_TYPE)
9094 error ("derived union `%T' invalid", ref);
9099 TYPE_USES_MULTIPLE_INHERITANCE (ref) = 1;
9100 /* If there is more than one non-empty they cannot be at the
9102 TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (ref) = 1;
9104 if (TYPE_FOR_JAVA (ref))
9105 error ("Java class '%T' cannot have multiple bases", ref);
9110 CLASSTYPE_VBASECLASSES (ref) = VEC_alloc (tree, max_vbases);
9111 TYPE_USES_VIRTUAL_BASECLASSES (ref) = 1;
9112 /* Converting to a virtual base class requires looking up the
9113 offset of the virtual base. */
9114 TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (ref) = 1;
9116 if (TYPE_FOR_JAVA (ref))
9117 error ("Java class '%T' cannot have virtual bases", ref);
9121 for (igo_prev = binfo; base_list; base_list = TREE_CHAIN (base_list))
9123 tree access = TREE_PURPOSE (base_list);
9124 int via_virtual = TREE_TYPE (base_list) != NULL_TREE;
9125 tree basetype = TREE_VALUE (base_list);
9126 tree base_binfo = NULL_TREE;
9128 if (access == access_default_node)
9129 access = default_access;
9131 if (TREE_CODE (basetype) == TYPE_DECL)
9132 basetype = TREE_TYPE (basetype);
9133 if (TREE_CODE (basetype) != RECORD_TYPE
9134 && TREE_CODE (basetype) != TYPENAME_TYPE
9135 && TREE_CODE (basetype) != TEMPLATE_TYPE_PARM
9136 && TREE_CODE (basetype) != BOUND_TEMPLATE_TEMPLATE_PARM)
9138 error ("base type `%T' fails to be a struct or class type",
9143 if (CLASSTYPE_MARKED (basetype))
9145 if (basetype == ref)
9146 error ("recursive type `%T' undefined", basetype);
9148 error ("duplicate base type `%T' invalid", basetype);
9151 SET_CLASSTYPE_MARKED (basetype);
9153 if (TYPE_FOR_JAVA (basetype) && (current_lang_depth () == 0))
9154 TYPE_FOR_JAVA (ref) = 1;
9156 if (CLASS_TYPE_P (basetype) && !dependent_type_p (basetype))
9158 base_binfo = TYPE_BINFO (basetype);
9159 /* The orignal basetype could have been a typedef'd type. */
9160 basetype = BINFO_TYPE (base_binfo);
9162 /* Inherit flags from the base. */
9163 TYPE_HAS_NEW_OPERATOR (ref)
9164 |= TYPE_HAS_NEW_OPERATOR (basetype);
9165 TYPE_HAS_ARRAY_NEW_OPERATOR (ref)
9166 |= TYPE_HAS_ARRAY_NEW_OPERATOR (basetype);
9167 TYPE_GETS_DELETE (ref) |= TYPE_GETS_DELETE (basetype);
9168 TYPE_USES_MULTIPLE_INHERITANCE (ref)
9169 |= TYPE_USES_MULTIPLE_INHERITANCE (basetype);
9170 TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (ref)
9171 |= TYPE_BASE_CONVS_MAY_REQUIRE_CODE_P (basetype);
9172 TYPE_HAS_CONVERSION (ref) |= TYPE_HAS_CONVERSION (basetype);
9175 base_binfo = copy_binfo (base_binfo, basetype, ref,
9176 &igo_prev, via_virtual);
9177 if (!BINFO_INHERITANCE_CHAIN (base_binfo))
9178 BINFO_INHERITANCE_CHAIN (base_binfo) = binfo;
9180 TREE_VEC_ELT (BINFO_BASE_ACCESSES (binfo), i) = access;
9181 BINFO_BASE_BINFO (binfo, i) = base_binfo;
9187 /* If any bases were invalid, we will have allocated too many
9189 TREE_VEC_LENGTH (BINFO_BASE_ACCESSES (binfo)) = i;
9190 TREE_VEC_LENGTH (BINFO_BASE_BINFOS (binfo)) = i;
9193 /* Unmark all the types. */
9194 for (i = 0; i != BINFO_N_BASE_BINFOS (binfo); i++)
9195 CLEAR_CLASSTYPE_MARKED (BINFO_TYPE (BINFO_BASE_BINFO (binfo, i)));
9196 CLEAR_CLASSTYPE_MARKED (ref);
9200 /* Begin compiling the definition of an enumeration type.
9201 NAME is its name (or null if anonymous).
9202 Returns the type object, as yet incomplete.
9203 Also records info about it so that build_enumerator
9204 may be used to declare the individual values as they are read. */
9207 start_enum (tree name)
9209 tree enumtype = NULL_TREE;
9210 struct cp_binding_level *b = current_binding_level;
9212 /* If this is the real definition for a previous forward reference,
9213 fill in the contents in the same object that used to be the
9214 forward reference. */
9216 if (name != NULL_TREE)
9217 enumtype = lookup_tag (ENUMERAL_TYPE, name, b, 1);
9219 if (enumtype != NULL_TREE && TREE_CODE (enumtype) == ENUMERAL_TYPE)
9221 error ("multiple definition of `%#T'", enumtype);
9222 error ("%Jprevious definition here", TYPE_MAIN_DECL (enumtype));
9223 /* Clear out TYPE_VALUES, and start again. */
9224 TYPE_VALUES (enumtype) = NULL_TREE;
9228 enumtype = make_node (ENUMERAL_TYPE);
9229 pushtag (name, enumtype, 0);
9235 /* After processing and defining all the values of an enumeration type,
9236 install their decls in the enumeration type and finish it off.
9237 ENUMTYPE is the type object and VALUES a list of name-value pairs. */
9240 finish_enum (tree enumtype)
9252 integer_type_kind itk;
9253 tree underlying_type = NULL_TREE;
9255 /* We built up the VALUES in reverse order. */
9256 TYPE_VALUES (enumtype) = nreverse (TYPE_VALUES (enumtype));
9258 /* For an enum defined in a template, just set the type of the values;
9259 all further processing is postponed until the template is
9260 instantiated. We need to set the type so that tsubst of a CONST_DECL
9262 if (processing_template_decl)
9264 for (values = TYPE_VALUES (enumtype);
9266 values = TREE_CHAIN (values))
9267 TREE_TYPE (TREE_VALUE (values)) = enumtype;
9268 if (at_function_scope_p ())
9269 add_stmt (build_min (TAG_DEFN, enumtype));
9273 /* Determine the minimum and maximum values of the enumerators. */
9274 if (TYPE_VALUES (enumtype))
9276 minnode = maxnode = NULL_TREE;
9278 for (values = TYPE_VALUES (enumtype);
9280 values = TREE_CHAIN (values))
9282 decl = TREE_VALUE (values);
9284 /* [dcl.enum]: Following the closing brace of an enum-specifier,
9285 each enumerator has the type of its enumeration. Prior to the
9286 closing brace, the type of each enumerator is the type of its
9287 initializing value. */
9288 TREE_TYPE (decl) = enumtype;
9290 /* Update the minimum and maximum values, if appropriate. */
9291 value = DECL_INITIAL (decl);
9292 /* Figure out what the minimum and maximum values of the
9295 minnode = maxnode = value;
9296 else if (tree_int_cst_lt (maxnode, value))
9298 else if (tree_int_cst_lt (value, minnode))
9301 /* Set the TREE_TYPE for the values as well. That's so that when
9302 we call decl_constant_value we get an entity of the right type
9303 (but with the constant value). But first make a copy so we
9304 don't clobber shared INTEGER_CSTs. */
9305 if (TREE_TYPE (value) != enumtype)
9307 value = DECL_INITIAL (decl) = copy_node (value);
9308 TREE_TYPE (value) = enumtype;
9315 If the enumerator-list is empty, the underlying type is as if
9316 the enumeration had a single enumerator with value 0. */
9317 minnode = maxnode = integer_zero_node;
9319 /* Compute the number of bits require to represent all values of the
9320 enumeration. We must do this before the type of MINNODE and
9321 MAXNODE are transformed, since min_precision relies on the
9322 TREE_TYPE of the value it is passed. */
9323 unsignedp = tree_int_cst_sgn (minnode) >= 0;
9324 lowprec = min_precision (minnode, unsignedp);
9325 highprec = min_precision (maxnode, unsignedp);
9326 precision = MAX (lowprec, highprec);
9328 /* Determine the underlying type of the enumeration.
9332 The underlying type of an enumeration is an integral type that
9333 can represent all the enumerator values defined in the
9334 enumeration. It is implementation-defined which integral type is
9335 used as the underlying type for an enumeration except that the
9336 underlying type shall not be larger than int unless the value of
9337 an enumerator cannot fit in an int or unsigned int.
9339 We use "int" or an "unsigned int" as the underlying type, even if
9340 a smaller integral type would work, unless the user has
9341 explicitly requested that we use the smallest possible type. */
9342 for (itk = (flag_short_enums ? itk_char : itk_int);
9346 underlying_type = integer_types[itk];
9347 if (TYPE_PRECISION (underlying_type) >= precision
9348 && TYPE_UNSIGNED (underlying_type) == unsignedp)
9351 if (itk == itk_none)
9355 IF no integral type can represent all the enumerator values, the
9356 enumeration is ill-formed. */
9357 error ("no integral type can represent all of the enumerator values "
9358 "for `%T'", enumtype);
9359 precision = TYPE_PRECISION (long_long_integer_type_node);
9360 underlying_type = integer_types[itk_unsigned_long_long];
9363 /* Compute the minium and maximum values for the type.
9367 For an enumeration where emin is the smallest enumerator and emax
9368 is the largest, the values of the enumeration are the values of the
9369 underlying type in the range bmin to bmax, where bmin and bmax are,
9370 respectively, the smallest and largest values of the smallest bit-
9371 field that can store emin and emax. */
9372 TYPE_PRECISION (enumtype) = precision;
9373 set_min_and_max_values_for_integral_type (enumtype, precision, unsignedp);
9377 The value of sizeof() applied to an enumeration type, an object
9378 of an enumeration type, or an enumerator, is the value of sizeof()
9379 applied to the underlying type. */
9380 TYPE_SIZE (enumtype) = TYPE_SIZE (underlying_type);
9381 TYPE_SIZE_UNIT (enumtype) = TYPE_SIZE_UNIT (underlying_type);
9382 TYPE_MODE (enumtype) = TYPE_MODE (underlying_type);
9383 TYPE_ALIGN (enumtype) = TYPE_ALIGN (underlying_type);
9384 TYPE_USER_ALIGN (enumtype) = TYPE_USER_ALIGN (underlying_type);
9385 TYPE_UNSIGNED (enumtype) = TYPE_UNSIGNED (underlying_type);
9387 /* Convert each of the enumerators to the type of the underlying
9388 type of the enumeration. */
9389 for (values = TYPE_VALUES (enumtype); values; values = TREE_CHAIN (values))
9391 decl = TREE_VALUE (values);
9392 value = perform_implicit_conversion (underlying_type,
9393 DECL_INITIAL (decl));
9394 TREE_TYPE (value) = enumtype;
9395 DECL_INITIAL (decl) = value;
9396 TREE_VALUE (values) = value;
9399 /* Fix up all variant types of this enum type. */
9400 for (t = TYPE_MAIN_VARIANT (enumtype); t; t = TYPE_NEXT_VARIANT (t))
9402 TYPE_VALUES (t) = TYPE_VALUES (enumtype);
9403 TYPE_MIN_VALUE (t) = TYPE_MIN_VALUE (enumtype);
9404 TYPE_MAX_VALUE (t) = TYPE_MAX_VALUE (enumtype);
9405 TYPE_SIZE (t) = TYPE_SIZE (enumtype);
9406 TYPE_SIZE_UNIT (t) = TYPE_SIZE_UNIT (enumtype);
9407 TYPE_MODE (t) = TYPE_MODE (enumtype);
9408 TYPE_PRECISION (t) = TYPE_PRECISION (enumtype);
9409 TYPE_ALIGN (t) = TYPE_ALIGN (enumtype);
9410 TYPE_USER_ALIGN (t) = TYPE_USER_ALIGN (enumtype);
9411 TYPE_UNSIGNED (t) = TYPE_UNSIGNED (enumtype);
9414 /* Finish debugging output for this type. */
9415 rest_of_type_compilation (enumtype, namespace_bindings_p ());
9418 /* Build and install a CONST_DECL for an enumeration constant of the
9419 enumeration type ENUMTYPE whose NAME and VALUE (if any) are provided.
9420 Assignment of sequential values by default is handled here. */
9423 build_enumerator (tree name, tree value, tree enumtype)
9429 /* Remove no-op casts from the value. */
9431 STRIP_TYPE_NOPS (value);
9433 if (! processing_template_decl)
9435 /* Validate and default VALUE. */
9436 if (value != NULL_TREE)
9438 value = decl_constant_value (value);
9440 if (TREE_CODE (value) == INTEGER_CST)
9442 value = perform_integral_promotions (value);
9443 constant_expression_warning (value);
9447 error ("enumerator value for `%D' not integer constant", name);
9452 /* Default based on previous value. */
9453 if (value == NULL_TREE)
9457 if (TYPE_VALUES (enumtype))
9459 /* The next value is the previous value ... */
9460 prev_value = DECL_INITIAL (TREE_VALUE (TYPE_VALUES (enumtype)));
9462 value = cp_build_binary_op (PLUS_EXPR,
9466 if (tree_int_cst_lt (value, prev_value))
9467 error ("overflow in enumeration values at `%D'", name);
9470 value = integer_zero_node;
9473 /* Remove no-op casts from the value. */
9474 STRIP_TYPE_NOPS (value);
9477 /* C++ associates enums with global, function, or class declarations. */
9478 context = current_scope ();
9480 context = current_namespace;
9482 /* Build the actual enumeration constant. Note that the enumeration
9483 constants have the type of their initializers until the
9484 enumeration is complete:
9488 Following the closing brace of an enum-specifier, each enumer-
9489 ator has the type of its enumeration. Prior to the closing
9490 brace, the type of each enumerator is the type of its
9493 In finish_enum we will reset the type. Of course, if we're
9494 processing a template, there may be no value. */
9495 type = value ? TREE_TYPE (value) : NULL_TREE;
9497 if (context && context == current_class_type)
9498 /* This enum declaration is local to the class. We need the full
9499 lang_decl so that we can record DECL_CLASS_CONTEXT, for example. */
9500 decl = build_lang_decl (CONST_DECL, name, type);
9502 /* It's a global enum, or it's local to a function. (Note local to
9503 a function could mean local to a class method. */
9504 decl = build_decl (CONST_DECL, name, type);
9506 DECL_CONTEXT (decl) = FROB_CONTEXT (context);
9507 TREE_CONSTANT (decl) = 1;
9508 TREE_INVARIANT (decl) = 1;
9509 TREE_READONLY (decl) = 1;
9510 DECL_INITIAL (decl) = value;
9512 if (context && context == current_class_type)
9513 /* In something like `struct S { enum E { i = 7 }; };' we put `i'
9514 on the TYPE_FIELDS list for `S'. (That's so that you can say
9515 things like `S::i' later.) */
9516 finish_member_declaration (decl);
9520 /* Add this enumeration constant to the list for this type. */
9521 TYPE_VALUES (enumtype) = tree_cons (name, decl, TYPE_VALUES (enumtype));
9525 /* We're defining DECL. Make sure that it's type is OK. */
9528 check_function_type (tree decl, tree current_function_parms)
9530 tree fntype = TREE_TYPE (decl);
9531 tree return_type = complete_type (TREE_TYPE (fntype));
9533 /* In a function definition, arg types must be complete. */
9534 require_complete_types_for_parms (current_function_parms);
9536 if (!COMPLETE_OR_VOID_TYPE_P (return_type))
9538 error ("return type `%#T' is incomplete", TREE_TYPE (fntype));
9540 /* Make it return void instead, but don't change the
9541 type of the DECL_RESULT, in case we have a named return value. */
9542 if (TREE_CODE (fntype) == METHOD_TYPE)
9544 tree ctype = TREE_TYPE (TREE_VALUE (TYPE_ARG_TYPES (fntype)));
9546 = build_method_type_directly (ctype,
9548 FUNCTION_ARG_CHAIN (decl));
9552 = build_function_type (void_type_node,
9553 TYPE_ARG_TYPES (TREE_TYPE (decl)));
9555 = build_exception_variant (fntype,
9556 TYPE_RAISES_EXCEPTIONS (fntype));
9559 abstract_virtuals_error (decl, TREE_TYPE (fntype));
9562 /* Create the FUNCTION_DECL for a function definition.
9563 DECLSPECS and DECLARATOR are the parts of the declaration;
9564 they describe the function's name and the type it returns,
9565 but twisted together in a fashion that parallels the syntax of C.
9567 FLAGS is a bitwise or of SF_PRE_PARSED (indicating that the
9568 DECLARATOR is really the DECL for the function we are about to
9569 process and that DECLSPECS should be ignored), SF_INCLASS_INLINE
9570 indicating that the function is an inline defined in-class.
9572 This function creates a binding context for the function body
9573 as well as setting up the FUNCTION_DECL in current_function_decl.
9575 For C++, we must first check whether that datum makes any sense.
9576 For example, "class A local_a(1,2);" means that variable local_a
9577 is an aggregate of type A, which should have a constructor
9578 applied to it with the argument list [1, 2]. */
9581 start_preparsed_function (tree decl1, tree attrs, int flags)
9583 tree ctype = NULL_TREE;
9586 int doing_friend = 0;
9587 struct cp_binding_level *bl;
9588 tree current_function_parms;
9591 my_friendly_assert (TREE_CODE (TREE_VALUE (void_list_node)) == VOID_TYPE, 160);
9592 my_friendly_assert (TREE_CHAIN (void_list_node) == NULL_TREE, 161);
9594 fntype = TREE_TYPE (decl1);
9595 if (TREE_CODE (fntype) == METHOD_TYPE)
9596 ctype = TYPE_METHOD_BASETYPE (fntype);
9598 /* ISO C++ 11.4/5. A friend function defined in a class is in
9599 the (lexical) scope of the class in which it is defined. */
9600 if (!ctype && DECL_FRIEND_P (decl1))
9602 ctype = DECL_FRIEND_CONTEXT (decl1);
9604 /* CTYPE could be null here if we're dealing with a template;
9605 for example, `inline friend float foo()' inside a template
9606 will have no CTYPE set. */
9607 if (ctype && TREE_CODE (ctype) != RECORD_TYPE)
9613 if (DECL_DECLARED_INLINE_P (decl1)
9614 && lookup_attribute ("noinline", attrs))
9615 warning ("%Jinline function '%D' given attribute noinline", decl1, decl1);
9617 if (DECL_MAYBE_IN_CHARGE_CONSTRUCTOR_P (decl1))
9618 /* This is a constructor, we must ensure that any default args
9619 introduced by this definition are propagated to the clones
9620 now. The clones are used directly in overload resolution. */
9621 adjust_clone_args (decl1);
9623 /* Sometimes we don't notice that a function is a static member, and
9624 build a METHOD_TYPE for it. Fix that up now. */
9625 if (ctype != NULL_TREE && DECL_STATIC_FUNCTION_P (decl1)
9626 && TREE_CODE (TREE_TYPE (decl1)) == METHOD_TYPE)
9628 revert_static_member_fn (decl1);
9632 /* Set up current_class_type, and enter the scope of the class, if
9635 push_nested_class (ctype);
9636 else if (DECL_STATIC_FUNCTION_P (decl1))
9637 push_nested_class (DECL_CONTEXT (decl1));
9639 /* Now that we have entered the scope of the class, we must restore
9640 the bindings for any template parameters surrounding DECL1, if it
9641 is an inline member template. (Order is important; consider the
9642 case where a template parameter has the same name as a field of
9643 the class.) It is not until after this point that
9644 PROCESSING_TEMPLATE_DECL is guaranteed to be set up correctly. */
9645 if (flags & SF_INCLASS_INLINE)
9646 maybe_begin_member_template_processing (decl1);
9648 /* Effective C++ rule 15. */
9650 && DECL_OVERLOADED_OPERATOR_P (decl1) == NOP_EXPR
9651 && TREE_CODE (TREE_TYPE (fntype)) == VOID_TYPE)
9652 warning ("`operator=' should return a reference to `*this'");
9654 /* Make the init_value nonzero so pushdecl knows this is not tentative.
9655 error_mark_node is replaced below (in poplevel) with the BLOCK. */
9656 if (!DECL_INITIAL (decl1))
9657 DECL_INITIAL (decl1) = error_mark_node;
9659 /* This function exists in static storage.
9660 (This does not mean `static' in the C sense!) */
9661 TREE_STATIC (decl1) = 1;
9663 /* We must call push_template_decl after current_class_type is set
9664 up. (If we are processing inline definitions after exiting a
9665 class scope, current_class_type will be NULL_TREE until set above
9666 by push_nested_class.) */
9667 if (processing_template_decl)
9668 decl1 = push_template_decl (decl1);
9670 /* We are now in the scope of the function being defined. */
9671 current_function_decl = decl1;
9673 /* Save the parm names or decls from this function's declarator
9674 where store_parm_decls will find them. */
9675 current_function_parms = DECL_ARGUMENTS (decl1);
9677 /* Make sure the parameter and return types are reasonable. When
9678 you declare a function, these types can be incomplete, but they
9679 must be complete when you define the function. */
9680 if (! processing_template_decl)
9681 check_function_type (decl1, current_function_parms);
9683 /* Build the return declaration for the function. */
9684 restype = TREE_TYPE (fntype);
9685 /* Promote the value to int before returning it. */
9686 if (c_promoting_integer_type_p (restype))
9687 restype = type_promotes_to (restype);
9688 if (DECL_RESULT (decl1) == NULL_TREE)
9691 = build_decl (RESULT_DECL, 0, TYPE_MAIN_VARIANT (restype));
9692 c_apply_type_quals_to_decl (cp_type_quals (restype),
9693 DECL_RESULT (decl1));
9696 /* Initialize RTL machinery. We cannot do this until
9697 CURRENT_FUNCTION_DECL and DECL_RESULT are set up. We do this
9698 even when processing a template; this is how we get
9699 CFUN set up, and our per-function variables initialized.
9700 FIXME factor out the non-RTL stuff. */
9701 bl = current_binding_level;
9702 allocate_struct_function (decl1);
9703 current_binding_level = bl;
9705 /* Even though we're inside a function body, we still don't want to
9706 call expand_expr to calculate the size of a variable-sized array.
9707 We haven't necessarily assigned RTL to all variables yet, so it's
9708 not safe to try to expand expressions involving them. */
9709 cfun->x_dont_save_pending_sizes_p = 1;
9711 /* Start the statement-tree, start the tree now. */
9712 DECL_SAVED_TREE (decl1) = push_stmt_list ();
9714 /* Let the user know we're compiling this function. */
9715 announce_function (decl1);
9717 /* Record the decl so that the function name is defined.
9718 If we already have a decl for this name, and it is a FUNCTION_DECL,
9719 use the old decl. */
9720 if (!processing_template_decl && !(flags & SF_PRE_PARSED))
9722 /* A specialization is not used to guide overload resolution. */
9723 if (!DECL_FUNCTION_MEMBER_P (decl1)
9724 && !(DECL_USE_TEMPLATE (decl1) &&
9725 PRIMARY_TEMPLATE_P (DECL_TI_TEMPLATE (decl1))))
9727 tree olddecl = pushdecl (decl1);
9729 if (olddecl == error_mark_node)
9730 /* If something went wrong when registering the declaration,
9731 use DECL1; we have to have a FUNCTION_DECL to use when
9732 parsing the body of the function. */
9735 /* Otherwise, OLDDECL is either a previous declaration of
9736 the same function or DECL1 itself. */
9741 /* We need to set the DECL_CONTEXT. */
9742 if (!DECL_CONTEXT (decl1) && DECL_TEMPLATE_INFO (decl1))
9743 DECL_CONTEXT (decl1) = DECL_CONTEXT (DECL_TI_TEMPLATE (decl1));
9744 /* And make sure we have enough default args. */
9745 check_default_args (decl1);
9747 fntype = TREE_TYPE (decl1);
9750 /* Reset these in case the call to pushdecl changed them. */
9751 current_function_decl = decl1;
9754 /* If we are (erroneously) defining a function that we have already
9755 defined before, wipe out what we knew before. */
9756 if (!DECL_PENDING_INLINE_P (decl1))
9757 DECL_SAVED_FUNCTION_DATA (decl1) = NULL;
9759 if (ctype && !doing_friend && !DECL_STATIC_FUNCTION_P (decl1))
9761 /* We know that this was set up by `grokclassfn'. We do not
9762 wait until `store_parm_decls', since evil parse errors may
9763 never get us to that point. Here we keep the consistency
9764 between `current_class_type' and `current_class_ptr'. */
9765 tree t = DECL_ARGUMENTS (decl1);
9767 my_friendly_assert (t != NULL_TREE && TREE_CODE (t) == PARM_DECL,
9769 my_friendly_assert (TREE_CODE (TREE_TYPE (t)) == POINTER_TYPE,
9772 cp_function_chain->x_current_class_ref
9773 = build_indirect_ref (t, NULL);
9774 cp_function_chain->x_current_class_ptr = t;
9776 /* Constructors and destructors need to know whether they're "in
9777 charge" of initializing virtual base classes. */
9779 if (DECL_HAS_IN_CHARGE_PARM_P (decl1))
9781 current_in_charge_parm = t;
9784 if (DECL_HAS_VTT_PARM_P (decl1))
9786 if (DECL_NAME (t) != vtt_parm_identifier)
9788 current_vtt_parm = t;
9792 if (DECL_INTERFACE_KNOWN (decl1))
9794 tree ctx = decl_function_context (decl1);
9796 if (DECL_NOT_REALLY_EXTERN (decl1))
9797 DECL_EXTERNAL (decl1) = 0;
9799 if (ctx != NULL_TREE && DECL_DECLARED_INLINE_P (ctx)
9800 && TREE_PUBLIC (ctx))
9801 /* This is a function in a local class in an extern inline
9803 comdat_linkage (decl1);
9805 /* If this function belongs to an interface, it is public.
9806 If it belongs to someone else's interface, it is also external.
9807 This only affects inlines and template instantiations. */
9808 else if (interface_unknown == 0
9809 && ! DECL_TEMPLATE_INSTANTIATION (decl1))
9811 if (DECL_DECLARED_INLINE_P (decl1)
9812 || DECL_TEMPLATE_INSTANTIATION (decl1)
9813 || processing_template_decl)
9815 DECL_EXTERNAL (decl1)
9817 || (DECL_DECLARED_INLINE_P (decl1)
9818 && ! flag_implement_inlines
9819 && !DECL_VINDEX (decl1)));
9821 /* For WIN32 we also want to put these in linkonce sections. */
9822 maybe_make_one_only (decl1);
9825 DECL_EXTERNAL (decl1) = 0;
9826 DECL_NOT_REALLY_EXTERN (decl1) = 0;
9827 DECL_INTERFACE_KNOWN (decl1) = 1;
9829 else if (interface_unknown && interface_only
9830 && ! DECL_TEMPLATE_INSTANTIATION (decl1))
9832 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma
9833 interface, we will have interface_only set but not
9834 interface_known. In that case, we don't want to use the normal
9835 heuristics because someone will supply a #pragma implementation
9836 elsewhere, and deducing it here would produce a conflict. */
9837 comdat_linkage (decl1);
9838 DECL_EXTERNAL (decl1) = 0;
9839 DECL_INTERFACE_KNOWN (decl1) = 1;
9840 DECL_DEFER_OUTPUT (decl1) = 1;
9844 /* This is a definition, not a reference.
9845 So clear DECL_EXTERNAL. */
9846 DECL_EXTERNAL (decl1) = 0;
9848 if ((DECL_DECLARED_INLINE_P (decl1)
9849 || DECL_TEMPLATE_INSTANTIATION (decl1))
9850 && ! DECL_INTERFACE_KNOWN (decl1)
9851 /* Don't try to defer nested functions for now. */
9852 && ! decl_function_context (decl1))
9853 DECL_DEFER_OUTPUT (decl1) = 1;
9855 DECL_INTERFACE_KNOWN (decl1) = 1;
9858 begin_scope (sk_function_parms, decl1);
9862 if (DECL_DESTRUCTOR_P (decl1))
9864 dtor_label = build_decl (LABEL_DECL, NULL_TREE, NULL_TREE);
9865 DECL_CONTEXT (dtor_label) = current_function_decl;
9868 start_fname_decls ();
9870 store_parm_decls (current_function_parms);
9874 /* Like start_preparsed_function, except that instead of a
9875 FUNCTION_DECL, this function takes DECLSPECS and DECLARATOR.
9877 Returns 1 on success. If the DECLARATOR is not suitable for a function
9878 (it defines a datum instead), we return 0, which tells
9879 yyparse to report a parse error. */
9882 start_function (cp_decl_specifier_seq *declspecs,
9883 const cp_declarator *declarator,
9888 if (have_extern_spec)
9890 declspecs->storage_class = sc_extern;
9891 /* This should only be done once on the outermost decl. */
9892 have_extern_spec = false;
9895 decl1 = grokdeclarator (declarator, declspecs, FUNCDEF, 1, &attrs);
9896 /* If the declarator is not suitable for a function definition,
9897 cause a syntax error. */
9898 if (decl1 == NULL_TREE || TREE_CODE (decl1) != FUNCTION_DECL)
9901 cplus_decl_attributes (&decl1, attrs, 0);
9903 /* If #pragma weak was used, mark the decl weak now. */
9904 if (global_scope_p (current_binding_level))
9905 maybe_apply_pragma_weak (decl1);
9907 if (DECL_MAIN_P (decl1))
9909 /* If this doesn't return integer_type, or a typedef to
9910 integer_type, complain. */
9911 if (!same_type_p (TREE_TYPE (TREE_TYPE (decl1)), integer_type_node))
9913 if (pedantic || warn_return_type)
9914 pedwarn ("return type for `main' changed to `int'");
9915 TREE_TYPE (decl1) = default_function_type;
9919 start_preparsed_function (decl1, attrs, /*flags=*/SF_DEFAULT);
9924 /* Store the parameter declarations into the current function declaration.
9925 This is called after parsing the parameter declarations, before
9926 digesting the body of the function.
9928 Also install to binding contour return value identifier, if any. */
9931 store_parm_decls (tree current_function_parms)
9933 tree fndecl = current_function_decl;
9936 /* This is a chain of any other decls that came in among the parm
9937 declarations. If a parm is declared with enum {foo, bar} x;
9938 then CONST_DECLs for foo and bar are put here. */
9939 tree nonparms = NULL_TREE;
9941 if (current_function_parms)
9943 /* This case is when the function was defined with an ANSI prototype.
9944 The parms already have decls, so we need not do anything here
9945 except record them as in effect
9946 and complain if any redundant old-style parm decls were written. */
9948 tree specparms = current_function_parms;
9951 /* Must clear this because it might contain TYPE_DECLs declared
9953 current_binding_level->names = NULL;
9955 /* If we're doing semantic analysis, then we'll call pushdecl
9956 for each of these. We must do them in reverse order so that
9957 they end in the correct forward order. */
9958 specparms = nreverse (specparms);
9960 for (parm = specparms; parm; parm = next)
9962 next = TREE_CHAIN (parm);
9963 if (TREE_CODE (parm) == PARM_DECL)
9965 if (DECL_NAME (parm) == NULL_TREE
9966 || TREE_CODE (parm) != VOID_TYPE)
9969 error ("parameter `%D' declared void", parm);
9973 /* If we find an enum constant or a type tag,
9974 put it aside for the moment. */
9975 TREE_CHAIN (parm) = NULL_TREE;
9976 nonparms = chainon (nonparms, parm);
9980 /* Get the decls in their original chain order and record in the
9981 function. This is all and only the PARM_DECLs that were
9982 pushed into scope by the loop above. */
9983 DECL_ARGUMENTS (fndecl) = getdecls ();
9986 DECL_ARGUMENTS (fndecl) = NULL_TREE;
9988 /* Now store the final chain of decls for the arguments
9989 as the decl-chain of the current lexical scope.
9990 Put the enumerators in as well, at the front so that
9991 DECL_ARGUMENTS is not modified. */
9992 current_binding_level->names = chainon (nonparms, DECL_ARGUMENTS (fndecl));
9994 /* Do the starting of the exception specifications, if we have any. */
9995 if (flag_exceptions && !processing_template_decl
9996 && flag_enforce_eh_specs
9997 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl)))
9998 current_eh_spec_block = begin_eh_spec_block ();
10002 /* We have finished doing semantic analysis on DECL, but have not yet
10003 generated RTL for its body. Save away our current state, so that
10004 when we want to generate RTL later we know what to do. */
10007 save_function_data (tree decl)
10009 struct language_function *f;
10011 /* Save the language-specific per-function data so that we can
10012 get it back when we really expand this function. */
10013 my_friendly_assert (!DECL_PENDING_INLINE_P (decl),
10017 f = ggc_alloc (sizeof (struct language_function));
10018 memcpy (f, cp_function_chain, sizeof (struct language_function));
10019 DECL_SAVED_FUNCTION_DATA (decl) = f;
10021 /* Clear out the bits we don't need. */
10022 f->base.x_stmt_tree.x_cur_stmt_list = NULL_TREE;
10023 f->x_named_label_uses = NULL;
10024 f->bindings = NULL;
10025 f->x_local_names = NULL;
10028 /* Add a note to mark the beginning of the main body of the constructor.
10029 This is used to set up the data structures for the cleanup regions for
10030 fully-constructed bases and members. */
10033 begin_constructor_body (void)
10037 /* Add a note to mark the end of the main body of the constructor. This is
10038 used to end the cleanup regions for fully-constructed bases and
10042 finish_constructor_body (void)
10046 /* Do all the processing for the beginning of a destructor; set up the
10047 vtable pointers and cleanups for bases and members. */
10050 begin_destructor_body (void)
10053 tree compound_stmt;
10055 /* If the dtor is empty, and we know there is not any possible
10056 way we could use any vtable entries, before they are possibly
10057 set by a base class dtor, we don't have to setup the vtables,
10058 as we know that any base class dtor will set up any vtables
10059 it needs. We avoid MI, because one base class dtor can do a
10060 virtual dispatch to an overridden function that would need to
10061 have a non-related vtable set up, we cannot avoid setting up
10062 vtables in that case. We could change this to see if there
10063 is just one vtable.
10065 ??? In the destructor for a class, the vtables are set
10066 appropriately for that class. There will be no non-related
10067 vtables. jason 2001-12-11. */
10068 if_stmt = begin_if_stmt ();
10070 /* If it is not safe to avoid setting up the vtables, then
10071 someone will change the condition to be boolean_true_node.
10072 (Actually, for now, we do not have code to set the condition
10073 appropriately, so we just assume that we always need to
10074 initialize the vtables.) */
10075 finish_if_stmt_cond (boolean_true_node, if_stmt);
10077 compound_stmt = begin_compound_stmt (0);
10079 /* Make all virtual function table pointers in non-virtual base
10080 classes point to CURRENT_CLASS_TYPE's virtual function
10082 initialize_vtbl_ptrs (current_class_ptr);
10084 finish_compound_stmt (compound_stmt);
10085 finish_then_clause (if_stmt);
10086 finish_if_stmt (if_stmt);
10088 /* And insert cleanups for our bases and members so that they
10089 will be properly destroyed if we throw. */
10090 push_base_cleanups ();
10093 /* At the end of every destructor we generate code to delete the object if
10094 necessary. Do that now. */
10097 finish_destructor_body (void)
10101 /* Any return from a destructor will end up here; that way all base
10102 and member cleanups will be run when the function returns. */
10103 add_stmt (build_stmt (LABEL_EXPR, dtor_label));
10105 /* In a virtual destructor, we must call delete. */
10106 if (DECL_VIRTUAL_P (current_function_decl))
10109 tree virtual_size = cxx_sizeof (current_class_type);
10113 At the point of definition of a virtual destructor (including
10114 an implicit definition), non-placement operator delete shall
10115 be looked up in the scope of the destructor's class and if
10116 found shall be accessible and unambiguous. */
10117 exprstmt = build_op_delete_call
10118 (DELETE_EXPR, current_class_ptr, virtual_size,
10119 /*global_p=*/false, NULL_TREE);
10121 if_stmt = begin_if_stmt ();
10122 finish_if_stmt_cond (build (BIT_AND_EXPR, integer_type_node,
10123 current_in_charge_parm,
10126 finish_expr_stmt (exprstmt);
10127 finish_then_clause (if_stmt);
10128 finish_if_stmt (if_stmt);
10132 /* Do the necessary processing for the beginning of a function body, which
10133 in this case includes member-initializers, but not the catch clauses of
10134 a function-try-block. Currently, this means opening a binding level
10135 for the member-initializers (in a ctor) and member cleanups (in a dtor).
10136 In other functions, this isn't necessary, but it doesn't hurt. */
10139 begin_function_body (void)
10143 if (processing_template_decl)
10144 /* Do nothing now. */;
10146 /* Always keep the BLOCK node associated with the outermost pair of
10147 curly braces of a function. These are needed for correct
10148 operation of dwarfout.c. */
10149 keep_next_level (true);
10151 stmt = begin_compound_stmt (BCS_FN_BODY);
10153 if (processing_template_decl)
10154 /* Do nothing now. */;
10155 else if (DECL_CONSTRUCTOR_P (current_function_decl))
10156 begin_constructor_body ();
10157 else if (DECL_DESTRUCTOR_P (current_function_decl))
10158 begin_destructor_body ();
10163 /* Do the processing for the end of a function body. Currently, this means
10164 closing out the cleanups for fully-constructed bases and members, and in
10165 the case of the destructor, deleting the object if desired. Again, this
10166 is only meaningful for [cd]tors, since they are the only functions where
10167 there is a significant distinction between the main body and any
10168 function catch clauses. Handling, say, main() return semantics here
10169 would be wrong, as flowing off the end of a function catch clause for
10170 main() would also need to return 0. */
10173 finish_function_body (tree compstmt)
10175 /* Close the block. */
10176 finish_compound_stmt (compstmt);
10178 if (processing_template_decl)
10179 /* Do nothing now. */;
10180 else if (DECL_CONSTRUCTOR_P (current_function_decl))
10181 finish_constructor_body ();
10182 else if (DECL_DESTRUCTOR_P (current_function_decl))
10183 finish_destructor_body ();
10186 /* Finish up a function declaration and compile that function
10187 all the way to assembler language output. The free the storage
10188 for the function definition.
10190 FLAGS is a bitwise or of the following values:
10192 We just finished processing the body of an in-class inline
10193 function definition. (This processing will have taken place
10194 after the class definition is complete.) */
10197 finish_function (int flags)
10199 tree fndecl = current_function_decl;
10200 tree fntype, ctype = NULL_TREE;
10201 int inclass_inline = (flags & 2) != 0;
10204 /* When we get some parse errors, we can end up without a
10205 current_function_decl, so cope. */
10206 if (fndecl == NULL_TREE)
10207 return error_mark_node;
10209 if (DECL_NONSTATIC_MEMBER_FUNCTION_P (fndecl)
10210 && DECL_VIRTUAL_P (fndecl)
10211 && !processing_template_decl)
10213 tree fnclass = DECL_CONTEXT (fndecl);
10214 if (fndecl == CLASSTYPE_KEY_METHOD (fnclass))
10215 keyed_classes = tree_cons (NULL_TREE, fnclass, keyed_classes);
10218 nested = function_depth > 1;
10219 fntype = TREE_TYPE (fndecl);
10221 /* TREE_READONLY (fndecl) = 1;
10222 This caused &foo to be of type ptr-to-const-function
10223 which then got a warning when stored in a ptr-to-function variable. */
10225 my_friendly_assert (building_stmt_tree (), 20000911);
10227 /* For a cloned function, we've already got all the code we need;
10228 there's no need to add any extra bits. */
10229 if (!DECL_CLONED_FUNCTION_P (fndecl))
10231 if (DECL_MAIN_P (current_function_decl))
10233 /* Make it so that `main' always returns 0 by default. */
10235 finish_return_stmt (integer_one_node);
10237 finish_return_stmt (integer_zero_node);
10241 /* Finish dealing with exception specifiers. */
10242 if (flag_exceptions && !processing_template_decl
10243 && flag_enforce_eh_specs
10244 && TYPE_RAISES_EXCEPTIONS (TREE_TYPE (current_function_decl)))
10245 finish_eh_spec_block (TYPE_RAISES_EXCEPTIONS
10246 (TREE_TYPE (current_function_decl)),
10247 current_eh_spec_block);
10250 /* If we're saving up tree structure, tie off the function now. */
10251 DECL_SAVED_TREE (fndecl) = pop_stmt_list (DECL_SAVED_TREE (fndecl));
10253 finish_fname_decls ();
10255 /* If this function can't throw any exceptions, remember that. */
10256 if (!processing_template_decl
10257 && !cp_function_chain->can_throw
10258 && !flag_non_call_exceptions)
10259 TREE_NOTHROW (fndecl) = 1;
10261 /* This must come after expand_function_end because cleanups might
10262 have declarations (from inline functions) that need to go into
10263 this function's blocks. */
10265 /* If the current binding level isn't the outermost binding level
10266 for this function, either there is a bug, or we have experienced
10267 syntax errors and the statement tree is malformed. */
10268 if (current_binding_level->kind != sk_function_parms)
10270 /* Make sure we have already experienced errors. */
10271 if (errorcount == 0)
10274 /* Throw away the broken statement tree and extra binding
10276 DECL_SAVED_TREE (fndecl) = alloc_stmt_list ();
10278 while (current_binding_level->kind != sk_function_parms)
10280 if (current_binding_level->kind == sk_class)
10281 pop_nested_class ();
10283 poplevel (0, 0, 0);
10286 poplevel (1, 0, 1);
10288 /* Statements should always be full-expressions at the outermost set
10289 of curly braces for a function. */
10290 my_friendly_assert (stmts_are_full_exprs_p (), 19990831);
10292 /* Set up the named return value optimization, if we can. Candidate
10293 variables are selected in check_return_value. */
10294 if (current_function_return_value)
10296 tree r = current_function_return_value;
10299 if (r != error_mark_node
10300 /* This is only worth doing for fns that return in memory--and
10301 simpler, since we don't have to worry about promoted modes. */
10302 && aggregate_value_p (TREE_TYPE (TREE_TYPE (fndecl)), fndecl)
10303 /* Only allow this for variables declared in the outer scope of
10304 the function so we know that their lifetime always ends with a
10305 return; see g++.dg/opt/nrv6.C. We could be more flexible if
10306 we were to do this optimization in tree-ssa. */
10307 && (outer = BLOCK_SUBBLOCKS (DECL_INITIAL (fndecl)))
10308 /* Skip the artificial function body block. */
10309 && (outer = BLOCK_SUBBLOCKS (outer))
10310 && chain_member (r, BLOCK_VARS (outer)))
10311 finalize_nrv (&DECL_SAVED_TREE (fndecl), r, DECL_RESULT (fndecl));
10313 current_function_return_value = NULL_TREE;
10316 /* Remember that we were in class scope. */
10317 if (current_class_name)
10318 ctype = current_class_type;
10320 /* Must mark the RESULT_DECL as being in this function. */
10321 DECL_CONTEXT (DECL_RESULT (fndecl)) = fndecl;
10323 /* Set the BLOCK_SUPERCONTEXT of the outermost function scope to point
10324 to the FUNCTION_DECL node itself. */
10325 BLOCK_SUPERCONTEXT (DECL_INITIAL (fndecl)) = fndecl;
10327 /* Save away current state, if appropriate. */
10328 if (!processing_template_decl)
10329 save_function_data (fndecl);
10331 /* Complain if there's just no return statement. */
10332 if (warn_return_type
10333 && TREE_CODE (TREE_TYPE (fntype)) != VOID_TYPE
10334 && !dependent_type_p (TREE_TYPE (fntype))
10335 && !current_function_returns_value && !current_function_returns_null
10336 /* Don't complain if we abort or throw. */
10337 && !current_function_returns_abnormally
10338 && !DECL_NAME (DECL_RESULT (fndecl))
10339 /* Normally, with -Wreturn-type, flow will complain. Unless we're an
10340 inline function, as we might never be compiled separately. */
10341 && (DECL_INLINE (fndecl) || processing_template_decl))
10342 warning ("no return statement in function returning non-void");
10344 /* Store the end of the function, so that we get good line number
10345 info for the epilogue. */
10346 cfun->function_end_locus = input_location;
10348 /* Genericize before inlining. */
10349 if (!processing_template_decl)
10351 cp_genericize (fndecl);
10353 /* Handle attribute((warn_unused_result)). Relies on gimple input. */
10354 c_warn_unused_result (&DECL_SAVED_TREE (fndecl));
10357 /* We're leaving the context of this function, so zap cfun. It's still in
10358 DECL_STRUCT_FUNCTION, and we'll restore it in tree_rest_of_compilation. */
10360 current_function_decl = NULL;
10362 /* If this is an in-class inline definition, we may have to pop the
10363 bindings for the template parameters that we added in
10364 maybe_begin_member_template_processing when start_function was
10366 if (inclass_inline)
10367 maybe_end_member_template_processing ();
10369 /* Leave the scope of the class. */
10371 pop_nested_class ();
10377 /* Let the error reporting routines know that we're outside a
10378 function. For a nested function, this value is used in
10379 cxx_pop_function_context and then reset via pop_function_context. */
10380 current_function_decl = NULL_TREE;
10385 /* Create the FUNCTION_DECL for a function definition.
10386 DECLSPECS and DECLARATOR are the parts of the declaration;
10387 they describe the return type and the name of the function,
10388 but twisted together in a fashion that parallels the syntax of C.
10390 This function creates a binding context for the function body
10391 as well as setting up the FUNCTION_DECL in current_function_decl.
10393 Returns a FUNCTION_DECL on success.
10395 If the DECLARATOR is not suitable for a function (it defines a datum
10396 instead), we return 0, which tells yyparse to report a parse error.
10398 May return void_type_node indicating that this method is actually
10399 a friend. See grokfield for more details.
10401 Came here with a `.pushlevel' .
10403 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
10404 CHANGES TO CODE IN `grokfield'. */
10407 start_method (cp_decl_specifier_seq *declspecs,
10408 const cp_declarator *declarator, tree attrlist)
10410 tree fndecl = grokdeclarator (declarator, declspecs, MEMFUNCDEF, 0,
10413 if (fndecl == error_mark_node)
10414 return error_mark_node;
10416 if (fndecl == NULL || TREE_CODE (fndecl) != FUNCTION_DECL)
10418 error ("invalid member function declaration");
10419 return error_mark_node;
10423 cplus_decl_attributes (&fndecl, attrlist, 0);
10425 /* Pass friends other than inline friend functions back. */
10426 if (fndecl == void_type_node)
10429 if (DECL_IN_AGGR_P (fndecl))
10431 if (DECL_CONTEXT (fndecl)
10432 && TREE_CODE( DECL_CONTEXT (fndecl)) != NAMESPACE_DECL)
10433 error ("`%D' is already defined in class `%T'", fndecl,
10434 DECL_CONTEXT (fndecl));
10435 return void_type_node;
10438 check_template_shadow (fndecl);
10440 DECL_DECLARED_INLINE_P (fndecl) = 1;
10441 if (flag_default_inline)
10442 DECL_INLINE (fndecl) = 1;
10444 /* We process method specializations in finish_struct_1. */
10445 if (processing_template_decl && !DECL_TEMPLATE_SPECIALIZATION (fndecl))
10447 fndecl = push_template_decl (fndecl);
10448 if (fndecl == error_mark_node)
10452 if (! DECL_FRIEND_P (fndecl))
10454 if (TREE_CHAIN (fndecl))
10456 fndecl = copy_node (fndecl);
10457 TREE_CHAIN (fndecl) = NULL_TREE;
10459 grok_special_member_properties (fndecl);
10462 cp_finish_decl (fndecl, NULL_TREE, NULL_TREE, 0);
10464 /* Make a place for the parms. */
10465 begin_scope (sk_function_parms, fndecl);
10467 DECL_IN_AGGR_P (fndecl) = 1;
10471 /* Go through the motions of finishing a function definition.
10472 We don't compile this method until after the whole class has
10475 FINISH_METHOD must return something that looks as though it
10476 came from GROKFIELD (since we are defining a method, after all).
10478 This is called after parsing the body of the function definition.
10479 STMTS is the chain of statements that makes up the function body.
10481 DECL is the ..._DECL that `start_method' provided. */
10484 finish_method (tree decl)
10486 tree fndecl = decl;
10491 if (decl == void_type_node)
10494 old_initial = DECL_INITIAL (fndecl);
10496 /* Undo the level for the parms (from start_method).
10497 This is like poplevel, but it causes nothing to be
10498 saved. Saving information here confuses symbol-table
10499 output routines. Besides, this information will
10500 be correctly output when this method is actually
10503 /* Clear out the meanings of the local variables of this level;
10504 also record in each decl which block it belongs to. */
10506 for (link = current_binding_level->names; link; link = TREE_CHAIN (link))
10508 if (DECL_NAME (link) != NULL_TREE)
10509 pop_binding (DECL_NAME (link), link);
10510 my_friendly_assert (TREE_CODE (link) != FUNCTION_DECL, 163);
10511 DECL_CONTEXT (link) = NULL_TREE;
10514 poplevel (0, 0, 0);
10516 DECL_INITIAL (fndecl) = old_initial;
10518 /* We used to check if the context of FNDECL was different from
10519 current_class_type as another way to get inside here. This didn't work
10520 for String.cc in libg++. */
10521 if (DECL_FRIEND_P (fndecl))
10523 CLASSTYPE_INLINE_FRIENDS (current_class_type)
10524 = tree_cons (NULL_TREE, fndecl, CLASSTYPE_INLINE_FRIENDS (current_class_type));
10525 decl = void_type_node;
10532 /* VAR is a VAR_DECL. If its type is incomplete, remember VAR so that
10533 we can lay it out later, when and if its type becomes complete. */
10536 maybe_register_incomplete_var (tree var)
10538 my_friendly_assert (TREE_CODE (var) == VAR_DECL, 20020406);
10540 /* Keep track of variables with incomplete types. */
10541 if (!processing_template_decl && TREE_TYPE (var) != error_mark_node
10542 && DECL_EXTERNAL (var))
10544 tree inner_type = TREE_TYPE (var);
10546 while (TREE_CODE (inner_type) == ARRAY_TYPE)
10547 inner_type = TREE_TYPE (inner_type);
10548 inner_type = TYPE_MAIN_VARIANT (inner_type);
10550 if ((!COMPLETE_TYPE_P (inner_type) && CLASS_TYPE_P (inner_type))
10551 /* RTTI TD entries are created while defining the type_info. */
10552 || (TYPE_LANG_SPECIFIC (inner_type)
10553 && TYPE_BEING_DEFINED (inner_type)))
10554 incomplete_vars = tree_cons (inner_type, var, incomplete_vars);
10558 /* Called when a class type (given by TYPE) is defined. If there are
10559 any existing VAR_DECLs whose type hsa been completed by this
10560 declaration, update them now. */
10563 complete_vars (tree type)
10565 tree *list = &incomplete_vars;
10567 my_friendly_assert (CLASS_TYPE_P (type), 20020406);
10570 if (same_type_p (type, TREE_PURPOSE (*list)))
10572 tree var = TREE_VALUE (*list);
10573 /* Complete the type of the variable. The VAR_DECL itself
10574 will be laid out in expand_expr. */
10575 complete_type (TREE_TYPE (var));
10576 /* Remove this entry from the list. */
10577 *list = TREE_CHAIN (*list);
10580 list = &TREE_CHAIN (*list);
10583 /* Check for pending declarations which may have abstract type. */
10584 complete_type_check_abstract (type);
10587 /* If DECL is of a type which needs a cleanup, build that cleanup
10591 cxx_maybe_build_cleanup (tree decl)
10593 tree type = TREE_TYPE (decl);
10595 if (type != error_mark_node && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
10597 int flags = LOOKUP_NORMAL|LOOKUP_DESTRUCTOR;
10600 if (TREE_CODE (type) == ARRAY_TYPE)
10604 cxx_mark_addressable (decl);
10605 rval = build_unary_op (ADDR_EXPR, decl, 0);
10608 /* Optimize for space over speed here. */
10609 if (! TYPE_USES_VIRTUAL_BASECLASSES (type)
10610 || flag_expensive_optimizations)
10611 flags |= LOOKUP_NONVIRTUAL;
10613 rval = build_delete (TREE_TYPE (rval), rval,
10614 sfk_complete_destructor, flags, 0);
10616 if (TYPE_USES_VIRTUAL_BASECLASSES (type)
10617 && ! TYPE_HAS_DESTRUCTOR (type))
10618 rval = build_compound_expr (rval, build_vbase_delete (type, decl));
10625 /* When a stmt has been parsed, this function is called. */
10632 /* DECL was originally constructed as a non-static member function,
10633 but turned out to be static. Update it accordingly. */
10636 revert_static_member_fn (tree decl)
10639 tree function = TREE_TYPE (decl);
10640 tree args = TYPE_ARG_TYPES (function);
10642 if (cp_type_quals (TREE_TYPE (TREE_VALUE (args)))
10643 != TYPE_UNQUALIFIED)
10644 error ("static member function `%#D' declared with type qualifiers",
10647 args = TREE_CHAIN (args);
10648 tmp = build_function_type (TREE_TYPE (function), args);
10649 tmp = build_qualified_type (tmp, cp_type_quals (function));
10650 tmp = build_exception_variant (tmp,
10651 TYPE_RAISES_EXCEPTIONS (function));
10652 TREE_TYPE (decl) = tmp;
10653 if (DECL_ARGUMENTS (decl))
10654 DECL_ARGUMENTS (decl) = TREE_CHAIN (DECL_ARGUMENTS (decl));
10655 DECL_STATIC_FUNCTION_P (decl) = 1;
10658 /* Initialize the variables used during compilation of a C++
10662 cxx_push_function_context (struct function * f)
10664 struct language_function *p
10665 = ggc_alloc_cleared (sizeof (struct language_function));
10668 /* Whenever we start a new function, we destroy temporaries in the
10670 current_stmt_tree ()->stmts_are_full_exprs_p = 1;
10676 if (DECL_SAVED_FUNCTION_DATA (fn))
10678 /* If we already parsed this function, and we're just expanding it
10679 now, restore saved state. */
10680 *cp_function_chain = *DECL_SAVED_FUNCTION_DATA (fn);
10682 /* We don't need the saved data anymore. Unless this is an inline
10683 function; we need the named return value info for
10684 cp_copy_res_decl_for_inlining. */
10685 if (! DECL_INLINE (fn))
10686 DECL_SAVED_FUNCTION_DATA (fn) = NULL;
10691 /* Free the language-specific parts of F, now that we've finished
10692 compiling the function. */
10695 cxx_pop_function_context (struct function * f)
10700 /* Return which tree structure is used by T, or TS_CP_GENERIC if T is
10701 one of the language-independent trees. */
10703 enum cp_tree_node_structure_enum
10704 cp_tree_node_structure (union lang_tree_node * t)
10706 switch (TREE_CODE (&t->generic))
10708 case DEFAULT_ARG: return TS_CP_DEFAULT_ARG;
10709 case IDENTIFIER_NODE: return TS_CP_IDENTIFIER;
10710 case OVERLOAD: return TS_CP_OVERLOAD;
10711 case TEMPLATE_PARM_INDEX: return TS_CP_TPI;
10712 case PTRMEM_CST: return TS_CP_PTRMEM;
10713 case BASELINK: return TS_CP_BASELINK;
10714 default: return TS_CP_GENERIC;
10718 /* Build the void_list_node (void_type_node having been created). */
10720 build_void_list_node (void)
10722 tree t = build_tree_list (NULL_TREE, void_type_node);
10727 cp_missing_noreturn_ok_p (tree decl)
10729 /* A missing noreturn is ok for the `main' function. */
10730 return DECL_MAIN_P (decl);
10733 #include "gt-cp-decl.h"
10734 #include "gtype-cp.h"