1 /* Process declarations and variables for C++ compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
4 Hacked 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"
49 extern cpp_reader *parse_in;
51 /* This structure contains information about the initializations
52 and/or destructions required for a particular priority level. */
53 typedef struct priority_info_s {
54 /* Nonzero if there have been any initializations at this priority
55 throughout the translation unit. */
56 int initializations_p;
57 /* Nonzero if there have been any destructions at this priority
58 throughout the translation unit. */
62 static void mark_vtable_entries (tree);
63 static void grok_function_init (tree, tree);
64 static bool maybe_emit_vtables (tree);
65 static void add_using_namespace (tree, tree, bool);
66 static cxx_binding *ambiguous_decl (tree, cxx_binding *, cxx_binding *, int);
67 static tree build_anon_union_vars (tree);
68 static bool acceptable_java_type (tree);
69 static void output_vtable_inherit (tree);
70 static tree start_objects (int, int);
71 static void finish_objects (int, int, tree);
72 static tree merge_functions (tree, tree);
73 static tree decl_namespace (tree);
74 static tree validate_nonmember_using_decl (tree, tree *, tree *);
75 static void do_nonmember_using_decl (tree, tree, tree, tree, tree *, tree *);
76 static tree start_static_storage_duration_function (unsigned);
77 static void finish_static_storage_duration_function (tree);
78 static priority_info get_priority_info (int);
79 static void do_static_initialization (tree, tree);
80 static void do_static_destruction (tree);
81 static tree start_static_initialization_or_destruction (tree, int);
82 static void finish_static_initialization_or_destruction (tree);
83 static void generate_ctor_or_dtor_function (bool, int, location_t *);
84 static int generate_ctor_and_dtor_functions_for_priority (splay_tree_node,
86 static tree prune_vars_needing_no_initialization (tree *);
87 static void write_out_vars (tree);
88 static void import_export_class (tree);
89 static tree get_guard_bits (tree);
91 /* A list of static class variables. This is needed, because a
92 static class variable can be declared inside the class without
93 an initializer, and then initialized, statically, outside the class. */
94 static GTY(()) varray_type pending_statics;
95 #define pending_statics_used \
96 (pending_statics ? pending_statics->elements_used : 0)
98 /* A list of functions which were declared inline, but which we
99 may need to emit outline anyway. */
100 static GTY(()) varray_type deferred_fns;
101 #define deferred_fns_used \
102 (deferred_fns ? deferred_fns->elements_used : 0)
104 /* Flag used when debugging spew.c */
106 extern int spew_debug;
108 /* Nonzero if we're done parsing and into end-of-file activities. */
112 /* Functions called along with real static constructors and destructors. */
117 /* The :: namespace. */
119 tree global_namespace;
121 /* Incorporate `const' and `volatile' qualifiers for member functions.
122 FUNCTION is a TYPE_DECL or a FUNCTION_DECL.
123 QUALS is a list of qualifiers. Returns any explicit
124 top-level qualifiers of the method's this pointer, anything other than
125 TYPE_UNQUALIFIED will be an extension. */
128 grok_method_quals (tree ctype, tree function, tree quals)
130 tree fntype = TREE_TYPE (function);
131 tree raises = TYPE_RAISES_EXCEPTIONS (fntype);
132 int type_quals = TYPE_UNQUALIFIED;
133 int dup_quals = TYPE_UNQUALIFIED;
134 int this_quals = TYPE_UNQUALIFIED;
138 int tq = cp_type_qual_from_rid (TREE_VALUE (quals));
140 if ((type_quals | this_quals) & tq)
142 else if (tq & TYPE_QUAL_RESTRICT)
146 quals = TREE_CHAIN (quals);
150 if (dup_quals != TYPE_UNQUALIFIED)
151 error ("duplicate type qualifiers in %s declaration",
152 TREE_CODE (function) == FUNCTION_DECL
153 ? "member function" : "type");
155 ctype = cp_build_qualified_type (ctype, type_quals);
156 fntype = build_cplus_method_type (ctype, TREE_TYPE (fntype),
157 (TREE_CODE (fntype) == METHOD_TYPE
158 ? TREE_CHAIN (TYPE_ARG_TYPES (fntype))
159 : TYPE_ARG_TYPES (fntype)));
161 fntype = build_exception_variant (fntype, raises);
163 TREE_TYPE (function) = fntype;
167 /* Warn when -fexternal-templates is used and #pragma
168 interface/implementation is not used all the times it should be,
172 warn_if_unknown_interface (tree decl)
174 static int already_warned = 0;
175 if (already_warned++)
178 if (flag_alt_external_templates)
180 tree til = tinst_for_decl ();
181 location_t saved_loc = input_location;
185 input_line = TINST_LINE (til);
186 input_filename = TINST_FILE (til);
188 warning ("template `%#D' instantiated in file without #pragma interface",
190 input_location = saved_loc;
193 cp_warning_at ("template `%#D' defined in file without #pragma interface",
197 /* A subroutine of the parser, to handle a component list. */
200 grok_x_components (tree specs)
204 specs = strip_attrs (specs);
206 check_tag_decl (specs);
207 t = groktypename (build_tree_list (specs, NULL_TREE));
209 /* The only case where we need to do anything additional here is an
210 anonymous union field, e.g.: `struct S { union { int i; }; };'. */
211 if (t == NULL_TREE || !ANON_AGGR_TYPE_P (t))
214 fixup_anonymous_aggr (t);
215 finish_member_declaration (build_decl (FIELD_DECL, NULL_TREE, t));
218 /* Build a PARM_DECL with NAME and TYPE, and set DECL_ARG_TYPE
222 cp_build_parm_decl (tree name, tree type)
224 tree parm = build_decl (PARM_DECL, name, type);
225 DECL_ARG_TYPE (parm) = type_passed_as (type);
229 /* Returns a PARM_DECL for a parameter of the indicated TYPE, with the
233 build_artificial_parm (tree name, tree type)
235 tree parm = cp_build_parm_decl (name, type);
236 DECL_ARTIFICIAL (parm) = 1;
237 /* All our artificial parms are implicitly `const'; they cannot be
239 TREE_READONLY (parm) = 1;
243 /* Constructors for types with virtual baseclasses need an "in-charge" flag
244 saying whether this constructor is responsible for initialization of
245 virtual baseclasses or not. All destructors also need this "in-charge"
246 flag, which additionally determines whether or not the destructor should
247 free the memory for the object.
249 This function adds the "in-charge" flag to member function FN if
250 appropriate. It is called from grokclassfn and tsubst.
251 FN must be either a constructor or destructor.
253 The in-charge flag follows the 'this' parameter, and is followed by the
254 VTT parm (if any), then the user-written parms. */
257 maybe_retrofit_in_chrg (tree fn)
259 tree basetype, arg_types, parms, parm, fntype;
261 /* If we've already add the in-charge parameter don't do it again. */
262 if (DECL_HAS_IN_CHARGE_PARM_P (fn))
265 /* When processing templates we can't know, in general, whether or
266 not we're going to have virtual baseclasses. */
267 if (uses_template_parms (fn))
270 /* We don't need an in-charge parameter for constructors that don't
271 have virtual bases. */
272 if (DECL_CONSTRUCTOR_P (fn)
273 && !TYPE_USES_VIRTUAL_BASECLASSES (DECL_CONTEXT (fn)))
276 arg_types = TYPE_ARG_TYPES (TREE_TYPE (fn));
277 basetype = TREE_TYPE (TREE_VALUE (arg_types));
278 arg_types = TREE_CHAIN (arg_types);
280 parms = TREE_CHAIN (DECL_ARGUMENTS (fn));
282 /* If this is a subobject constructor or destructor, our caller will
283 pass us a pointer to our VTT. */
284 if (TYPE_USES_VIRTUAL_BASECLASSES (DECL_CONTEXT (fn)))
286 parm = build_artificial_parm (vtt_parm_identifier, vtt_parm_type);
288 /* First add it to DECL_ARGUMENTS between 'this' and the real args... */
289 TREE_CHAIN (parm) = parms;
292 /* ...and then to TYPE_ARG_TYPES. */
293 arg_types = hash_tree_chain (vtt_parm_type, arg_types);
295 DECL_HAS_VTT_PARM_P (fn) = 1;
298 /* Then add the in-charge parm (before the VTT parm). */
299 parm = build_artificial_parm (in_charge_identifier, integer_type_node);
300 TREE_CHAIN (parm) = parms;
302 arg_types = hash_tree_chain (integer_type_node, arg_types);
304 /* Insert our new parameter(s) into the list. */
305 TREE_CHAIN (DECL_ARGUMENTS (fn)) = parms;
307 /* And rebuild the function type. */
308 fntype = build_cplus_method_type (basetype, TREE_TYPE (TREE_TYPE (fn)),
310 if (TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn)))
311 fntype = build_exception_variant (fntype,
312 TYPE_RAISES_EXCEPTIONS (TREE_TYPE (fn)));
313 TREE_TYPE (fn) = fntype;
315 /* Now we've got the in-charge parameter. */
316 DECL_HAS_IN_CHARGE_PARM_P (fn) = 1;
319 /* Classes overload their constituent function names automatically.
320 When a function name is declared in a record structure,
321 its name is changed to it overloaded name. Since names for
322 constructors and destructors can conflict, we place a leading
325 CNAME is the name of the class we are grokking for.
327 FUNCTION is a FUNCTION_DECL. It was created by `grokdeclarator'.
329 FLAGS contains bits saying what's special about today's
330 arguments. 1 == DESTRUCTOR. 2 == OPERATOR.
332 If FUNCTION is a destructor, then we must add the `auto-delete' field
333 as a second parameter. There is some hair associated with the fact
334 that we must "declare" this variable in the manner consistent with the
335 way the rest of the arguments were declared.
337 QUALS are the qualifiers for the this pointer. */
340 grokclassfn (tree ctype, tree function, enum overload_flags flags, tree quals)
342 tree fn_name = DECL_NAME (function);
343 int this_quals = TYPE_UNQUALIFIED;
345 /* Even within an `extern "C"' block, members get C++ linkage. See
346 [dcl.link] for details. */
347 SET_DECL_LANGUAGE (function, lang_cplusplus);
349 if (fn_name == NULL_TREE)
351 error ("name missing for member function");
352 fn_name = get_identifier ("<anonymous>");
353 DECL_NAME (function) = fn_name;
357 this_quals = grok_method_quals (ctype, function, quals);
359 if (TREE_CODE (TREE_TYPE (function)) == METHOD_TYPE)
361 /* Must add the class instance variable up front. */
362 /* Right now we just make this a pointer. But later
363 we may wish to make it special. */
364 tree type = TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (function)));
368 /* The `this' parameter is implicitly `const'; it cannot be
370 this_quals |= TYPE_QUAL_CONST;
371 qual_type = cp_build_qualified_type (type, this_quals);
372 parm = build_artificial_parm (this_identifier, qual_type);
373 c_apply_type_quals_to_decl (this_quals, parm);
374 TREE_CHAIN (parm) = last_function_parms;
375 last_function_parms = parm;
378 DECL_ARGUMENTS (function) = last_function_parms;
379 DECL_CONTEXT (function) = ctype;
381 if (flags == DTOR_FLAG)
382 DECL_DESTRUCTOR_P (function) = 1;
384 if (flags == DTOR_FLAG || DECL_CONSTRUCTOR_P (function))
385 maybe_retrofit_in_chrg (function);
387 if (flags == DTOR_FLAG)
389 DECL_DESTRUCTOR_P (function) = 1;
390 TYPE_HAS_DESTRUCTOR (ctype) = 1;
394 /* Create an ARRAY_REF, checking for the user doing things backwards
398 grok_array_decl (tree array_expr, tree index_exp)
400 tree type = TREE_TYPE (array_expr);
403 if (type == error_mark_node || index_exp == error_mark_node)
404 return error_mark_node;
405 if (processing_template_decl)
406 return build_min (ARRAY_REF, type ? TREE_TYPE (type) : NULL_TREE,
407 array_expr, index_exp);
409 if (type == NULL_TREE)
411 /* Something has gone very wrong. Assume we are mistakenly reducing
412 an expression instead of a declaration. */
413 error ("parser may be lost: is there a '{' missing somewhere?");
417 if (TREE_CODE (type) == OFFSET_TYPE
418 || TREE_CODE (type) == REFERENCE_TYPE)
419 type = TREE_TYPE (type);
421 /* If they have an `operator[]', use that. */
422 if (IS_AGGR_TYPE (type) || IS_AGGR_TYPE (TREE_TYPE (index_exp)))
423 return build_new_op (ARRAY_REF, LOOKUP_NORMAL,
424 array_expr, index_exp, NULL_TREE);
426 /* Otherwise, create an ARRAY_REF for a pointer or array type. It
427 is a little-known fact that, if `a' is an array and `i' is an
428 int, you can write `i[a]', which means the same thing as `a[i]'. */
430 if (TREE_CODE (type) == ARRAY_TYPE)
433 p1 = build_expr_type_conversion (WANT_POINTER, array_expr, false);
435 if (TREE_CODE (TREE_TYPE (index_exp)) == ARRAY_TYPE)
438 p2 = build_expr_type_conversion (WANT_POINTER, index_exp, false);
440 i1 = build_expr_type_conversion (WANT_INT | WANT_ENUM, array_expr, false);
441 i2 = build_expr_type_conversion (WANT_INT | WANT_ENUM, index_exp, false);
443 if ((p1 && i2) && (i1 && p2))
444 error ("ambiguous conversion for array subscript");
447 array_expr = p1, index_exp = i2;
449 array_expr = p2, index_exp = i1;
452 error ("invalid types `%T[%T]' for array subscript",
453 type, TREE_TYPE (index_exp));
454 return error_mark_node;
457 if (array_expr == error_mark_node || index_exp == error_mark_node)
458 error ("ambiguous conversion for array subscript");
460 return build_array_ref (array_expr, index_exp);
463 /* Given the cast expression EXP, checking out its validity. Either return
464 an error_mark_node if there was an unavoidable error, return a cast to
465 void for trying to delete a pointer w/ the value 0, or return the
466 call to delete. If DOING_VEC is 1, we handle things differently
467 for doing an array delete. If DOING_VEC is 2, they gave us the
468 array size as an argument to delete.
469 Implements ARM $5.3.4. This is called from the parser. */
472 delete_sanity (tree exp, tree size, int doing_vec, int use_global_delete)
475 /* For a regular vector delete (aka, no size argument) we will pass
476 this down as a NULL_TREE into build_vec_delete. */
477 tree maxindex = NULL_TREE;
479 if (exp == error_mark_node)
482 if (processing_template_decl)
484 t = build_min (DELETE_EXPR, void_type_node, exp, size);
485 DELETE_EXPR_USE_GLOBAL (t) = use_global_delete;
486 DELETE_EXPR_USE_VEC (t) = doing_vec;
490 if (TREE_CODE (exp) == OFFSET_REF)
491 exp = resolve_offset_ref (exp);
492 exp = convert_from_reference (exp);
493 t = build_expr_type_conversion (WANT_POINTER, exp, true);
495 if (t == NULL_TREE || t == error_mark_node)
497 error ("type `%#T' argument given to `delete', expected pointer",
499 return error_mark_node;
504 maxindex = cp_build_binary_op (MINUS_EXPR, size, integer_one_node);
505 pedwarn ("anachronistic use of array size in vector delete");
508 type = TREE_TYPE (t);
510 /* As of Valley Forge, you can delete a pointer to const. */
512 /* You can't delete functions. */
513 if (TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE)
515 error ("cannot delete a function. Only pointer-to-objects are valid arguments to `delete'");
516 return error_mark_node;
519 /* Deleting ptr to void is undefined behavior [expr.delete/3]. */
520 if (TREE_CODE (TREE_TYPE (type)) == VOID_TYPE)
522 warning ("deleting `%T' is undefined", type);
526 /* An array can't have been allocated by new, so complain. */
527 if (TREE_CODE (t) == ADDR_EXPR
528 && TREE_CODE (TREE_OPERAND (t, 0)) == VAR_DECL
529 && TREE_CODE (TREE_TYPE (TREE_OPERAND (t, 0))) == ARRAY_TYPE)
530 warning ("deleting array `%#D'", TREE_OPERAND (t, 0));
532 /* Deleting a pointer with the value zero is valid and has no effect. */
533 if (integer_zerop (t))
534 return build1 (NOP_EXPR, void_type_node, t);
537 return build_vec_delete (t, maxindex, sfk_deleting_destructor,
540 return build_delete (type, t, sfk_deleting_destructor,
541 LOOKUP_NORMAL, use_global_delete);
544 /* Report an error if the indicated template declaration is not the
545 sort of thing that should be a member template. */
548 check_member_template (tree tmpl)
552 my_friendly_assert (TREE_CODE (tmpl) == TEMPLATE_DECL, 0);
553 decl = DECL_TEMPLATE_RESULT (tmpl);
555 if (TREE_CODE (decl) == FUNCTION_DECL
556 || (TREE_CODE (decl) == TYPE_DECL
557 && IS_AGGR_TYPE (TREE_TYPE (decl))))
559 if (current_function_decl)
560 /* 14.5.2.2 [temp.mem]
562 A local class shall not have member templates. */
563 error ("invalid declaration of member template `%#D' in local class",
566 if (TREE_CODE (decl) == FUNCTION_DECL && DECL_VIRTUAL_P (decl))
568 /* 14.5.2.3 [temp.mem]
570 A member function template shall not be virtual. */
572 ("invalid use of `virtual' in template declaration of `%#D'",
574 DECL_VIRTUAL_P (decl) = 0;
577 /* The debug-information generating code doesn't know what to do
578 with member templates. */
579 DECL_IGNORED_P (tmpl) = 1;
582 error ("template declaration of `%#D'", decl);
585 /* Return true iff TYPE is a valid Java parameter or return type. */
588 acceptable_java_type (tree type)
590 if (TREE_CODE (type) == VOID_TYPE || TYPE_FOR_JAVA (type))
592 if (TREE_CODE (type) == POINTER_TYPE || TREE_CODE (type) == REFERENCE_TYPE)
594 type = TREE_TYPE (type);
595 if (TREE_CODE (type) == RECORD_TYPE)
598 if (! TYPE_FOR_JAVA (type))
600 if (! CLASSTYPE_TEMPLATE_INFO (type))
602 args = CLASSTYPE_TI_ARGS (type);
603 i = TREE_VEC_LENGTH (args);
606 type = TREE_VEC_ELT (args, i);
607 if (TREE_CODE (type) == POINTER_TYPE)
608 type = TREE_TYPE (type);
609 if (! TYPE_FOR_JAVA (type))
618 /* For a METHOD in a Java class CTYPE, return true if
619 the parameter and return types are valid Java types.
620 Otherwise, print appropriate error messages, and return false. */
623 check_java_method (tree method)
626 tree arg_types = TYPE_ARG_TYPES (TREE_TYPE (method));
627 tree ret_type = TREE_TYPE (TREE_TYPE (method));
628 if (!acceptable_java_type (ret_type))
630 error ("Java method '%D' has non-Java return type `%T'",
634 for (; arg_types != NULL_TREE; arg_types = TREE_CHAIN (arg_types))
636 tree type = TREE_VALUE (arg_types);
637 if (!acceptable_java_type (type))
639 error ("Java method '%D' has non-Java parameter type `%T'",
647 /* Sanity check: report error if this function FUNCTION is not
648 really a member of the class (CTYPE) it is supposed to belong to.
649 CNAME is the same here as it is for grokclassfn above. */
652 check_classfn (tree ctype, tree function)
657 if (DECL_USE_TEMPLATE (function)
658 && !(TREE_CODE (function) == TEMPLATE_DECL
659 && DECL_TEMPLATE_SPECIALIZATION (function))
660 && is_member_template (DECL_TI_TEMPLATE (function)))
661 /* Since this is a specialization of a member template,
662 we're not going to find the declaration in the class.
665 struct S { template <typename T> void f(T); };
666 template <> void S::f(int);
668 we're not going to find `S::f(int)', but there's no
669 reason we should, either. We let our callers know we didn't
670 find the method, but we don't complain. */
673 /* OK, is this a definition of a member template? */
674 is_template = (TREE_CODE (function) == TEMPLATE_DECL
675 || (processing_template_decl - template_class_depth (ctype)));
677 ix = lookup_fnfields_1 (complete_type (ctype),
678 DECL_CONSTRUCTOR_P (function) ? ctor_identifier :
679 DECL_DESTRUCTOR_P (function) ? dtor_identifier :
680 DECL_NAME (function));
684 tree methods = CLASSTYPE_METHOD_VEC (ctype);
685 tree fndecls, fndecl = 0;
687 const char *format = NULL;
690 for (fndecls = TREE_VEC_ELT (methods, ix);
691 fndecls; fndecls = OVL_NEXT (fndecls))
695 fndecl = OVL_CURRENT (fndecls);
696 p1 = TYPE_ARG_TYPES (TREE_TYPE (function));
697 p2 = TYPE_ARG_TYPES (TREE_TYPE (fndecl));
699 /* We cannot simply call decls_match because this doesn't
700 work for static member functions that are pretending to
701 be methods, and because the name may have been changed by
704 /* Get rid of the this parameter on functions that become
706 if (DECL_STATIC_FUNCTION_P (fndecl)
707 && TREE_CODE (TREE_TYPE (function)) == METHOD_TYPE)
708 p1 = TREE_CHAIN (p1);
710 /* A member template definition only matches a member template
712 if (is_template != (TREE_CODE (fndecl) == TEMPLATE_DECL))
715 if (same_type_p (TREE_TYPE (TREE_TYPE (function)),
716 TREE_TYPE (TREE_TYPE (fndecl)))
717 && compparms (p1, p2)
718 && (DECL_TEMPLATE_SPECIALIZATION (function)
719 == DECL_TEMPLATE_SPECIALIZATION (fndecl))
720 && (!DECL_TEMPLATE_SPECIALIZATION (function)
721 || (DECL_TI_TEMPLATE (function)
722 == DECL_TI_TEMPLATE (fndecl))))
727 return OVL_CURRENT (fndecls);
728 error ("prototype for `%#D' does not match any in class `%T'",
730 is_conv_op = DECL_CONV_FN_P (fndecl);
733 ix = CLASSTYPE_FIRST_CONVERSION_SLOT;
734 fndecls = TREE_VEC_ELT (methods, ix);
737 fndecl = OVL_CURRENT (fndecls);
738 fndecls = OVL_NEXT (fndecls);
740 if (!fndecls && is_conv_op)
742 if (TREE_VEC_LENGTH (methods) > ix)
745 fndecls = TREE_VEC_ELT (methods, ix);
746 if (!DECL_CONV_FN_P (OVL_CURRENT (fndecls)))
758 format = "candidates are: %#D";
760 format = "candidate is: %#D";
761 cp_error_at (format, fndecl);
764 else if (!COMPLETE_TYPE_P (ctype))
765 cxx_incomplete_type_error (function, ctype);
767 error ("no `%#D' member function declared in class `%T'",
770 /* If we did not find the method in the class, add it to avoid
771 spurious errors (unless the CTYPE is not yet defined, in which
772 case we'll only confuse ourselves when the function is declared
773 properly within the class. */
774 if (COMPLETE_TYPE_P (ctype))
775 add_method (ctype, function, /*error_p=*/1);
779 /* We have just processed the DECL, which is a static data member.
780 Its initializer, if present, is INIT. The ASMSPEC_TREE, if
781 present, is the assembly-language name for the data member.
782 FLAGS is as for cp_finish_decl. */
785 finish_static_data_member_decl (tree decl, tree init, tree asmspec_tree,
788 my_friendly_assert (TREE_PUBLIC (decl), 0);
790 DECL_CONTEXT (decl) = current_class_type;
792 /* We cannot call pushdecl here, because that would fill in the
793 TREE_CHAIN of our decl. Instead, we modify cp_finish_decl to do
794 the right thing, namely, to put this decl out straight away. */
795 /* current_class_type can be NULL_TREE in case of error. */
796 if (!asmspec_tree && current_class_type)
797 DECL_INITIAL (decl) = error_mark_node;
799 if (! processing_template_decl)
801 if (!pending_statics)
802 VARRAY_TREE_INIT (pending_statics, 32, "pending_statics");
803 VARRAY_PUSH_TREE (pending_statics, decl);
806 if (LOCAL_CLASS_P (current_class_type))
807 pedwarn ("local class `%#T' shall not have static data member `%#D'",
808 current_class_type, decl);
810 /* Static consts need not be initialized in the class definition. */
811 if (init != NULL_TREE && TYPE_NEEDS_CONSTRUCTING (TREE_TYPE (decl)))
813 static int explained = 0;
815 error ("initializer invalid for static member with constructor");
818 error ("(an out of class initialization is required)");
823 /* Force the compiler to know when an uninitialized static const
824 member is being used. */
825 if (CP_TYPE_CONST_P (TREE_TYPE (decl)) && init == 0)
826 TREE_USED (decl) = 1;
827 DECL_INITIAL (decl) = init;
828 DECL_IN_AGGR_P (decl) = 1;
830 cp_finish_decl (decl, init, asmspec_tree, flags);
833 /* Process the specs, declarator (NULL if omitted) and width (NULL if omitted)
834 of a structure component, returning a _DECL node.
835 QUALS is a list of type qualifiers for this decl (such as for declaring
836 const member functions).
838 This is done during the parsing of the struct declaration.
839 The _DECL nodes are chained together and the lot of them
840 are ultimately passed to `build_struct' to make the RECORD_TYPE node.
842 If class A defines that certain functions in class B are friends, then
843 the way I have set things up, it is B who is interested in permission
844 granted by A. However, it is in A's context that these declarations
845 are parsed. By returning a void_type_node, class A does not attempt
846 to incorporate the declarations of the friends within its structure.
848 DO NOT MAKE ANY CHANGES TO THIS CODE WITHOUT MAKING CORRESPONDING
849 CHANGES TO CODE IN `start_method'. */
852 grokfield (tree declarator, tree declspecs, tree init, tree asmspec_tree,
856 const char *asmspec = 0;
857 int flags = LOOKUP_ONLYCONVERTING;
859 if (declspecs == NULL_TREE
860 && TREE_CODE (declarator) == SCOPE_REF
861 && TREE_CODE (TREE_OPERAND (declarator, 1)) == IDENTIFIER_NODE)
863 /* Access declaration */
864 if (! IS_AGGR_TYPE_CODE (TREE_CODE (TREE_OPERAND (declarator, 0))))
866 else if (TREE_COMPLEXITY (declarator) == current_class_depth)
868 return do_class_using_decl (declarator);
872 && TREE_CODE (init) == TREE_LIST
873 && TREE_VALUE (init) == error_mark_node
874 && TREE_CHAIN (init) == NULL_TREE)
877 value = grokdeclarator (declarator, declspecs, FIELD, init != 0, &attrlist);
878 if (! value || value == error_mark_node)
879 /* friend or constructor went bad. */
881 if (TREE_TYPE (value) == error_mark_node)
882 return error_mark_node;
884 if (TREE_CODE (value) == TYPE_DECL && init)
886 error ("typedef `%D' is initialized (use __typeof__ instead)", value);
890 /* Pass friendly classes back. */
891 if (TREE_CODE (value) == VOID_TYPE)
892 return void_type_node;
894 if (DECL_NAME (value) != NULL_TREE
895 && IDENTIFIER_POINTER (DECL_NAME (value))[0] == '_'
896 && ! strcmp (IDENTIFIER_POINTER (DECL_NAME (value)), "_vptr"))
897 error ("member `%D' conflicts with virtual function table field name",
900 /* Stash away type declarations. */
901 if (TREE_CODE (value) == TYPE_DECL)
903 DECL_NONLOCAL (value) = 1;
904 DECL_CONTEXT (value) = current_class_type;
906 if (CLASS_TYPE_P (TREE_TYPE (value)))
907 CLASSTYPE_GOT_SEMICOLON (TREE_TYPE (value)) = 1;
909 if (processing_template_decl)
910 value = push_template_decl (value);
915 if (DECL_IN_AGGR_P (value))
917 error ("`%D' is already defined in `%T'", value,
918 DECL_CONTEXT (value));
919 return void_type_node;
923 asmspec = TREE_STRING_POINTER (asmspec_tree);
927 if (TREE_CODE (value) == FUNCTION_DECL)
929 grok_function_init (value, init);
932 else if (pedantic && TREE_CODE (value) != VAR_DECL)
933 /* Already complained in grokdeclarator. */
937 /* We allow initializers to become parameters to base
939 if (TREE_CODE (init) == TREE_LIST)
941 if (TREE_CHAIN (init) == NULL_TREE)
942 init = TREE_VALUE (init);
944 init = digest_init (TREE_TYPE (value), init, (tree *)0);
947 if (!processing_template_decl)
949 if (TREE_CODE (init) == CONST_DECL)
950 init = DECL_INITIAL (init);
951 else if (TREE_READONLY_DECL_P (init))
952 init = decl_constant_value (init);
953 else if (TREE_CODE (init) == CONSTRUCTOR)
954 init = digest_init (TREE_TYPE (value), init, (tree *)0);
955 if (init == error_mark_node)
956 /* We must make this look different than `error_mark_node'
957 because `decl_const_value' would mis-interpret it
958 as only meaning that this VAR_DECL is defined. */
959 init = build1 (NOP_EXPR, TREE_TYPE (value), init);
960 else if (! TREE_CONSTANT (init))
962 /* We can allow references to things that are effectively
963 static, since references are initialized with the
965 if (TREE_CODE (TREE_TYPE (value)) != REFERENCE_TYPE
966 || (TREE_STATIC (init) == 0
967 && (!DECL_P (init) || DECL_EXTERNAL (init) == 0)))
969 error ("field initializer is not constant");
970 init = error_mark_node;
977 if (processing_template_decl && ! current_function_decl
978 && (TREE_CODE (value) == VAR_DECL || TREE_CODE (value) == FUNCTION_DECL))
979 value = push_template_decl (value);
982 cplus_decl_attributes (&value, attrlist, 0);
984 if (TREE_CODE (value) == VAR_DECL)
986 finish_static_data_member_decl (value, init, asmspec_tree,
990 if (TREE_CODE (value) == FIELD_DECL)
993 error ("`asm' specifiers are not permitted on non-static data members");
994 if (DECL_INITIAL (value) == error_mark_node)
995 init = error_mark_node;
996 cp_finish_decl (value, init, NULL_TREE, flags);
997 DECL_INITIAL (value) = init;
998 DECL_IN_AGGR_P (value) = 1;
1001 if (TREE_CODE (value) == FUNCTION_DECL)
1005 /* This must override the asm specifier which was placed
1006 by grokclassfn. Lay this out fresh. */
1007 SET_DECL_RTL (value, NULL_RTX);
1008 SET_DECL_ASSEMBLER_NAME (value, get_identifier (asmspec));
1010 if (!DECL_FRIEND_P (value))
1011 grok_special_member_properties (value);
1013 cp_finish_decl (value, init, asmspec_tree, flags);
1015 /* Pass friends back this way. */
1016 if (DECL_FRIEND_P (value))
1017 return void_type_node;
1019 DECL_IN_AGGR_P (value) = 1;
1027 /* Like `grokfield', but for bitfields.
1028 WIDTH is non-NULL for bit fields only, and is an INTEGER_CST node. */
1031 grokbitfield (tree declarator, tree declspecs, tree width)
1033 register tree value = grokdeclarator (declarator, declspecs, BITFIELD,
1036 if (! value) return NULL_TREE; /* friends went bad. */
1038 /* Pass friendly classes back. */
1039 if (TREE_CODE (value) == VOID_TYPE)
1040 return void_type_node;
1042 if (TREE_CODE (value) == TYPE_DECL)
1044 error ("cannot declare `%D' to be a bit-field type", value);
1048 /* Usually, finish_struct_1 catches bitfields with invalid types.
1049 But, in the case of bitfields with function type, we confuse
1050 ourselves into thinking they are member functions, so we must
1052 if (TREE_CODE (value) == FUNCTION_DECL)
1054 error ("cannot declare bit-field `%D' with function type",
1059 if (DECL_IN_AGGR_P (value))
1061 error ("`%D' is already defined in the class %T", value,
1062 DECL_CONTEXT (value));
1063 return void_type_node;
1066 if (TREE_STATIC (value))
1068 error ("static member `%D' cannot be a bit-field", value);
1071 cp_finish_decl (value, NULL_TREE, NULL_TREE, 0);
1073 if (width != error_mark_node)
1075 constant_expression_warning (width);
1076 DECL_INITIAL (value) = width;
1077 SET_DECL_C_BIT_FIELD (value);
1080 DECL_IN_AGGR_P (value) = 1;
1084 /* When a function is declared with an initializer,
1085 do the right thing. Currently, there are two possibilities:
1090 // initialization possibility #1.
1091 virtual void f () = 0;
1113 // initialization possibility #2
1120 grok_function_init (tree decl, tree init)
1122 /* An initializer for a function tells how this function should
1124 tree type = TREE_TYPE (decl);
1126 if (TREE_CODE (type) == FUNCTION_TYPE)
1127 error ("initializer specified for non-member function `%D'", decl);
1128 else if (integer_zerop (init))
1129 DECL_PURE_VIRTUAL_P (decl) = 1;
1131 error ("invalid initializer for virtual method `%D'", decl);
1135 cplus_decl_attributes (tree *decl, tree attributes, int flags)
1137 if (*decl == NULL_TREE || *decl == void_type_node)
1140 if (TREE_CODE (*decl) == TEMPLATE_DECL)
1141 decl = &DECL_TEMPLATE_RESULT (*decl);
1143 decl_attributes (decl, attributes, flags);
1145 if (TREE_CODE (*decl) == TYPE_DECL)
1146 SET_IDENTIFIER_TYPE_VALUE (DECL_NAME (*decl), TREE_TYPE (*decl));
1149 /* Return the name for the constructor (or destructor) for the
1150 specified class TYPE. When given a template, this routine doesn't
1151 lose the specialization. */
1154 constructor_name_full (tree type)
1156 type = TYPE_MAIN_VARIANT (type);
1157 if (CLASS_TYPE_P (type) && TYPE_WAS_ANONYMOUS (type)
1158 && TYPE_HAS_CONSTRUCTOR (type))
1159 return DECL_NAME (OVL_CURRENT (CLASSTYPE_CONSTRUCTORS (type)));
1161 return TYPE_IDENTIFIER (type);
1164 /* Return the name for the constructor (or destructor) for the
1165 specified class. When given a template, return the plain
1166 unspecialized name. */
1169 constructor_name (tree type)
1172 name = constructor_name_full (type);
1173 if (IDENTIFIER_TEMPLATE (name))
1174 name = IDENTIFIER_TEMPLATE (name);
1178 /* Returns TRUE if NAME is the name for the constructor for TYPE. */
1181 constructor_name_p (tree name, tree type)
1183 return (name == constructor_name (type)
1184 || name == constructor_name_full (type));
1188 /* Defer the compilation of the FN until the end of compilation. */
1193 if (DECL_DEFERRED_FN (fn))
1195 DECL_DEFERRED_FN (fn) = 1;
1197 VARRAY_TREE_INIT (deferred_fns, 32, "deferred_fns");
1199 VARRAY_PUSH_TREE (deferred_fns, fn);
1202 /* Walks through the namespace- or function-scope anonymous union OBJECT,
1203 building appropriate ALIAS_DECLs. Returns one of the fields for use in
1204 the mangled name. */
1207 build_anon_union_vars (tree object)
1209 tree type = TREE_TYPE (object);
1210 tree main_decl = NULL_TREE;
1213 /* Rather than write the code to handle the non-union case,
1214 just give an error. */
1215 if (TREE_CODE (type) != UNION_TYPE)
1216 error ("anonymous struct not inside named type");
1218 for (field = TYPE_FIELDS (type);
1220 field = TREE_CHAIN (field))
1225 if (DECL_ARTIFICIAL (field))
1227 if (TREE_CODE (field) != FIELD_DECL)
1230 `%#D' invalid; an anonymous union can only have non-static data members",
1235 if (TREE_PRIVATE (field))
1236 cp_pedwarn_at ("private member `%#D' in anonymous union", field);
1237 else if (TREE_PROTECTED (field))
1238 cp_pedwarn_at ("protected member `%#D' in anonymous union", field);
1240 if (processing_template_decl)
1241 ref = build_min_nt (COMPONENT_REF, object, DECL_NAME (field));
1243 ref = build_class_member_access_expr (object, field, NULL_TREE,
1246 if (DECL_NAME (field))
1248 decl = build_decl (ALIAS_DECL, DECL_NAME (field), TREE_TYPE (field));
1249 DECL_INITIAL (decl) = ref;
1250 TREE_PUBLIC (decl) = 0;
1251 TREE_STATIC (decl) = 0;
1252 DECL_EXTERNAL (decl) = 1;
1253 decl = pushdecl (decl);
1255 else if (ANON_AGGR_TYPE_P (TREE_TYPE (field)))
1256 decl = build_anon_union_vars (ref);
1260 if (main_decl == NULL_TREE)
1267 /* Finish off the processing of a UNION_TYPE structure. If the union is an
1268 anonymous union, then all members must be laid out together. PUBLIC_P
1269 is nonzero if this union is not declared static. */
1272 finish_anon_union (tree anon_union_decl)
1274 tree type = TREE_TYPE (anon_union_decl);
1276 bool public_p = TREE_PUBLIC (anon_union_decl);
1278 /* The VAR_DECL's context is the same as the TYPE's context. */
1279 DECL_CONTEXT (anon_union_decl) = DECL_CONTEXT (TYPE_NAME (type));
1281 if (TYPE_FIELDS (type) == NULL_TREE)
1286 error ("namespace-scope anonymous aggregates must be static");
1290 main_decl = build_anon_union_vars (anon_union_decl);
1291 if (main_decl == NULL_TREE)
1293 warning ("anonymous union with no members");
1297 if (!processing_template_decl)
1299 /* Use main_decl to set the mangled name. */
1300 DECL_NAME (anon_union_decl) = DECL_NAME (main_decl);
1301 mangle_decl (anon_union_decl);
1302 DECL_NAME (anon_union_decl) = NULL_TREE;
1305 pushdecl (anon_union_decl);
1306 if (building_stmt_tree ()
1307 && at_function_scope_p ())
1308 add_decl_stmt (anon_union_decl);
1309 else if (!processing_template_decl)
1310 rest_of_decl_compilation (anon_union_decl, NULL,
1311 toplevel_bindings_p (), at_eof);
1314 /* Auxiliary functions to make type signatures for
1315 `operator new' and `operator delete' correspond to
1316 what compiler will be expecting. */
1319 coerce_new_type (tree type)
1322 tree args = TYPE_ARG_TYPES (type);
1324 my_friendly_assert (TREE_CODE (type) == FUNCTION_TYPE, 20001107);
1326 if (!same_type_p (TREE_TYPE (type), ptr_type_node))
1327 e = 1, error ("`operator new' must return type `%T'", ptr_type_node);
1329 if (!args || args == void_list_node
1330 || !same_type_p (TREE_VALUE (args), size_type_node))
1333 if (args && args != void_list_node)
1334 args = TREE_CHAIN (args);
1335 pedwarn ("`operator new' takes type `size_t' (`%T') as first parameter", size_type_node);
1340 args = tree_cons (NULL_TREE, size_type_node, args);
1343 type = build_exception_variant
1344 (build_function_type (ptr_type_node, args),
1345 TYPE_RAISES_EXCEPTIONS (type));
1353 coerce_delete_type (tree type)
1356 tree args = TYPE_ARG_TYPES (type);
1358 my_friendly_assert (TREE_CODE (type) == FUNCTION_TYPE, 20001107);
1360 if (!same_type_p (TREE_TYPE (type), void_type_node))
1361 e = 1, error ("`operator delete' must return type `%T'", void_type_node);
1363 if (!args || args == void_list_node
1364 || !same_type_p (TREE_VALUE (args), ptr_type_node))
1367 if (args && args != void_list_node)
1368 args = TREE_CHAIN (args);
1369 error ("`operator delete' takes type `%T' as first parameter", ptr_type_node);
1374 args = tree_cons (NULL_TREE, ptr_type_node, args);
1377 type = build_exception_variant
1378 (build_function_type (void_type_node, args),
1379 TYPE_RAISES_EXCEPTIONS (type));
1388 mark_vtable_entries (tree decl)
1390 tree entries = CONSTRUCTOR_ELTS (DECL_INITIAL (decl));
1392 for (; entries; entries = TREE_CHAIN (entries))
1394 tree fnaddr = TREE_VALUE (entries);
1397 if (TREE_CODE (fnaddr) != ADDR_EXPR
1398 && TREE_CODE (fnaddr) != FDESC_EXPR)
1399 /* This entry is an offset: a virtual base class offset, a
1400 virtual call offset, an RTTI offset, etc. */
1403 fn = TREE_OPERAND (fnaddr, 0);
1404 TREE_ADDRESSABLE (fn) = 1;
1405 /* When we don't have vcall offsets, we output thunks whenever
1406 we output the vtables that contain them. With vcall offsets,
1407 we know all the thunks we'll need when we emit a virtual
1408 function, so we emit the thunks there instead. */
1409 if (DECL_THUNK_P (fn))
1410 use_thunk (fn, /*emit_p=*/0);
1415 /* Set DECL up to have the closest approximation of "initialized common"
1416 linkage available. */
1419 comdat_linkage (tree decl)
1422 make_decl_one_only (decl);
1423 else if (TREE_CODE (decl) == FUNCTION_DECL
1424 || (TREE_CODE (decl) == VAR_DECL && DECL_ARTIFICIAL (decl)))
1425 /* We can just emit function and compiler-generated variables
1426 statically; having multiple copies is (for the most part) only
1429 There are two correctness issues, however: the address of a
1430 template instantiation with external linkage should be the
1431 same, independent of what translation unit asks for the
1432 address, and this will not hold when we emit multiple copies of
1433 the function. However, there's little else we can do.
1435 Also, by default, the typeinfo implementation assumes that
1436 there will be only one copy of the string used as the name for
1437 each type. Therefore, if weak symbols are unavailable, the
1438 run-time library should perform a more conservative check; it
1439 should perform a string comparison, rather than an address
1441 TREE_PUBLIC (decl) = 0;
1444 /* Static data member template instantiations, however, cannot
1445 have multiple copies. */
1446 if (DECL_INITIAL (decl) == 0
1447 || DECL_INITIAL (decl) == error_mark_node)
1448 DECL_COMMON (decl) = 1;
1449 else if (EMPTY_CONSTRUCTOR_P (DECL_INITIAL (decl)))
1451 DECL_COMMON (decl) = 1;
1452 DECL_INITIAL (decl) = error_mark_node;
1454 else if (!DECL_EXPLICIT_INSTANTIATION (decl))
1456 /* We can't do anything useful; leave vars for explicit
1458 DECL_EXTERNAL (decl) = 1;
1459 DECL_NOT_REALLY_EXTERN (decl) = 0;
1463 if (DECL_LANG_SPECIFIC (decl))
1464 DECL_COMDAT (decl) = 1;
1467 /* For win32 we also want to put explicit instantiations in
1468 linkonce sections, so that they will be merged with implicit
1469 instantiations; otherwise we get duplicate symbol errors. */
1472 maybe_make_one_only (tree decl)
1474 /* We used to say that this was not necessary on targets that support weak
1475 symbols, because the implicit instantiations will defer to the explicit
1476 one. However, that's not actually the case in SVR4; a strong definition
1477 after a weak one is an error. Also, not making explicit
1478 instantiations one_only means that we can end up with two copies of
1479 some template instantiations. */
1483 /* We can't set DECL_COMDAT on functions, or finish_file will think
1484 we can get away with not emitting them if they aren't used. We need
1485 to for variables so that cp_finish_decl will update their linkage,
1486 because their DECL_INITIAL may not have been set properly yet. */
1488 make_decl_one_only (decl);
1490 if (TREE_CODE (decl) == VAR_DECL)
1492 DECL_COMDAT (decl) = 1;
1493 /* Mark it needed so we don't forget to emit it. */
1494 TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)) = 1;
1498 /* Set TREE_PUBLIC and/or DECL_EXTERN on the vtable DECL,
1499 based on TYPE and other static flags.
1501 Note that anything public is tagged TREE_PUBLIC, whether
1502 it's public in this file or in another one. */
1505 import_export_vtable (tree decl, tree type, int final)
1507 if (DECL_INTERFACE_KNOWN (decl))
1510 if (TYPE_FOR_JAVA (type))
1512 TREE_PUBLIC (decl) = 1;
1513 DECL_EXTERNAL (decl) = 1;
1514 DECL_INTERFACE_KNOWN (decl) = 1;
1516 else if (CLASSTYPE_INTERFACE_KNOWN (type))
1518 TREE_PUBLIC (decl) = 1;
1519 DECL_EXTERNAL (decl) = CLASSTYPE_INTERFACE_ONLY (type);
1520 DECL_INTERFACE_KNOWN (decl) = 1;
1524 /* We can only wait to decide if we have real non-inline virtual
1525 functions in our class, or if we come from a template. */
1527 int found = (CLASSTYPE_TEMPLATE_INSTANTIATION (type)
1528 || CLASSTYPE_KEY_METHOD (type) != NULL_TREE);
1530 if (final || ! found)
1532 comdat_linkage (decl);
1533 DECL_EXTERNAL (decl) = 0;
1537 TREE_PUBLIC (decl) = 1;
1538 DECL_EXTERNAL (decl) = 1;
1543 /* Determine whether or not we want to specifically import or export CTYPE,
1544 using various heuristics. */
1547 import_export_class (tree ctype)
1549 /* -1 for imported, 1 for exported. */
1550 int import_export = 0;
1552 /* It only makes sense to call this function at EOF. The reason is
1553 that this function looks at whether or not the first non-inline
1554 non-abstract virtual member function has been defined in this
1555 translation unit. But, we can't possibly know that until we've
1556 seen the entire translation unit. */
1557 my_friendly_assert (at_eof, 20000226);
1559 if (CLASSTYPE_INTERFACE_KNOWN (ctype))
1562 /* If MULTIPLE_SYMBOL_SPACES is defined and we saw a #pragma interface,
1563 we will have CLASSTYPE_INTERFACE_ONLY set but not
1564 CLASSTYPE_INTERFACE_KNOWN. In that case, we don't want to use this
1565 heuristic because someone will supply a #pragma implementation
1566 elsewhere, and deducing it here would produce a conflict. */
1567 if (CLASSTYPE_INTERFACE_ONLY (ctype))
1570 if (lookup_attribute ("dllimport", TYPE_ATTRIBUTES (ctype)))
1572 else if (lookup_attribute ("dllexport", TYPE_ATTRIBUTES (ctype)))
1575 /* If we got -fno-implicit-templates, we import template classes that
1576 weren't explicitly instantiated. */
1577 if (import_export == 0
1578 && CLASSTYPE_IMPLICIT_INSTANTIATION (ctype)
1579 && ! flag_implicit_templates)
1582 /* Base our import/export status on that of the first non-inline,
1583 non-pure virtual function, if any. */
1584 if (import_export == 0
1585 && TYPE_POLYMORPHIC_P (ctype))
1587 tree method = CLASSTYPE_KEY_METHOD (ctype);
1589 import_export = (DECL_REALLY_EXTERN (method) ? -1 : 1);
1592 #ifdef MULTIPLE_SYMBOL_SPACES
1593 if (import_export == -1)
1599 SET_CLASSTYPE_INTERFACE_KNOWN (ctype);
1600 CLASSTYPE_INTERFACE_ONLY (ctype) = (import_export < 0);
1604 /* We need to describe to the assembler the relationship between
1605 a vtable and the vtable of the parent class. */
1608 output_vtable_inherit (tree vars)
1611 rtx child_rtx, parent_rtx;
1613 child_rtx = XEXP (DECL_RTL (vars), 0); /* strip the mem ref */
1615 parent = binfo_for_vtable (vars);
1617 if (parent == TYPE_BINFO (DECL_CONTEXT (vars)))
1618 parent_rtx = const0_rtx;
1621 parent = get_vtbl_decl_for_binfo (TYPE_BINFO (BINFO_TYPE (parent)));
1622 parent_rtx = XEXP (DECL_RTL (parent), 0); /* strip the mem ref */
1627 assemble_vtable_inherit (child_rtx, parent_rtx);
1630 /* If necessary, write out the vtables for the dynamic class CTYPE.
1631 Returns true if any vtables were emitted. */
1634 maybe_emit_vtables (tree ctype)
1639 /* If the vtables for this class have already been emitted there is
1640 nothing more to do. */
1641 primary_vtbl = CLASSTYPE_VTABLES (ctype);
1642 if (TREE_ASM_WRITTEN (primary_vtbl))
1644 /* Ignore dummy vtables made by get_vtable_decl. */
1645 if (TREE_TYPE (primary_vtbl) == void_type_node)
1648 import_export_class (ctype);
1649 import_export_vtable (primary_vtbl, ctype, 1);
1651 /* See if any of the vtables are needed. */
1652 for (vtbl = CLASSTYPE_VTABLES (ctype); vtbl; vtbl = TREE_CHAIN (vtbl))
1653 if (!DECL_EXTERNAL (vtbl) && DECL_NEEDED_P (vtbl))
1658 /* If the references to this class' vtables are optimized away,
1659 still emit the appropriate debugging information. See
1661 if (DECL_COMDAT (primary_vtbl)
1662 && CLASSTYPE_DEBUG_REQUESTED (ctype))
1663 note_debug_info_needed (ctype);
1667 /* The ABI requires that we emit all of the vtables if we emit any
1669 for (vtbl = CLASSTYPE_VTABLES (ctype); vtbl; vtbl = TREE_CHAIN (vtbl))
1672 import_export_vtable (vtbl, ctype, 1);
1673 mark_vtable_entries (vtbl);
1674 if (TREE_TYPE (DECL_INITIAL (vtbl)) == 0)
1675 store_init_value (vtbl, DECL_INITIAL (vtbl));
1677 if (write_symbols == DWARF_DEBUG || write_symbols == DWARF2_DEBUG)
1679 /* Mark the VAR_DECL node representing the vtable itself as a
1680 "gratuitous" one, thereby forcing dwarfout.c to ignore it.
1681 It is rather important that such things be ignored because
1682 any effort to actually generate DWARF for them will run
1683 into trouble when/if we encounter code like:
1686 struct S { virtual void member (); };
1688 because the artificial declaration of the vtable itself (as
1689 manufactured by the g++ front end) will say that the vtable
1690 is a static member of `S' but only *after* the debug output
1691 for the definition of `S' has already been output. This causes
1692 grief because the DWARF entry for the definition of the vtable
1693 will try to refer back to an earlier *declaration* of the
1694 vtable as a static member of `S' and there won't be one.
1695 We might be able to arrange to have the "vtable static member"
1696 attached to the member list for `S' before the debug info for
1697 `S' get written (which would solve the problem) but that would
1698 require more intrusive changes to the g++ front end. */
1700 DECL_IGNORED_P (vtbl) = 1;
1703 /* Always make vtables weak. */
1705 comdat_linkage (vtbl);
1707 rest_of_decl_compilation (vtbl, NULL, 1, 1);
1710 output_vtable_inherit (vtbl);
1712 /* Because we're only doing syntax-checking, we'll never end up
1713 actually marking the variable as written. */
1714 if (flag_syntax_only)
1715 TREE_ASM_WRITTEN (vtbl) = 1;
1718 /* Since we're writing out the vtable here, also write the debug
1720 note_debug_info_needed (ctype);
1725 /* Determines the proper settings of TREE_PUBLIC and DECL_EXTERNAL for an
1726 inline function or template instantiation at end-of-file. */
1729 import_export_decl (tree decl)
1731 if (DECL_INTERFACE_KNOWN (decl))
1734 if (DECL_TEMPLATE_INSTANTIATION (decl)
1735 || DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl))
1737 DECL_NOT_REALLY_EXTERN (decl) = 1;
1738 if ((DECL_IMPLICIT_INSTANTIATION (decl)
1739 || DECL_FRIEND_PSEUDO_TEMPLATE_INSTANTIATION (decl))
1740 && (flag_implicit_templates
1741 || (flag_implicit_inline_templates
1742 && DECL_DECLARED_INLINE_P (decl))))
1744 if (!TREE_PUBLIC (decl))
1745 /* Templates are allowed to have internal linkage. See
1749 comdat_linkage (decl);
1753 DECL_EXTERNAL (decl) = 1;
1754 DECL_NOT_REALLY_EXTERN (decl) = 0;
1757 else if (DECL_FUNCTION_MEMBER_P (decl))
1759 if (!DECL_DECLARED_INLINE_P (decl))
1761 tree ctype = DECL_CONTEXT (decl);
1762 import_export_class (ctype);
1763 if (CLASSTYPE_INTERFACE_KNOWN (ctype))
1765 DECL_NOT_REALLY_EXTERN (decl)
1766 = ! (CLASSTYPE_INTERFACE_ONLY (ctype)
1767 || (DECL_DECLARED_INLINE_P (decl)
1768 && ! flag_implement_inlines
1769 && !DECL_VINDEX (decl)));
1771 if (!DECL_NOT_REALLY_EXTERN (decl))
1772 DECL_EXTERNAL (decl) = 1;
1774 /* Always make artificials weak. */
1775 if (DECL_ARTIFICIAL (decl) && flag_weak)
1776 comdat_linkage (decl);
1778 maybe_make_one_only (decl);
1782 comdat_linkage (decl);
1785 comdat_linkage (decl);
1787 DECL_INTERFACE_KNOWN (decl) = 1;
1790 /* Here, we only decide whether or not the tinfo node should be
1791 emitted with the vtable. IS_IN_LIBRARY is nonzero iff the
1792 typeinfo for TYPE should be in the runtime library. */
1795 import_export_tinfo (tree decl, tree type, bool is_in_library)
1797 if (DECL_INTERFACE_KNOWN (decl))
1800 if (IS_AGGR_TYPE (type))
1801 import_export_class (type);
1803 if (IS_AGGR_TYPE (type) && CLASSTYPE_INTERFACE_KNOWN (type)
1804 && TYPE_POLYMORPHIC_P (type)
1805 /* If -fno-rtti, we're not necessarily emitting this stuff with
1806 the class, so go ahead and emit it now. This can happen when
1807 a class is used in exception handling. */
1810 DECL_NOT_REALLY_EXTERN (decl) = !CLASSTYPE_INTERFACE_ONLY (type);
1811 DECL_COMDAT (decl) = 0;
1815 DECL_NOT_REALLY_EXTERN (decl) = 1;
1816 DECL_COMDAT (decl) = 1;
1819 /* Now override some cases. */
1821 DECL_COMDAT (decl) = 1;
1822 else if (is_in_library)
1823 DECL_COMDAT (decl) = 0;
1825 DECL_INTERFACE_KNOWN (decl) = 1;
1828 /* Return an expression that performs the destruction of DECL, which
1829 must be a VAR_DECL whose type has a non-trivial destructor, or is
1830 an array whose (innermost) elements have a non-trivial destructor. */
1833 build_cleanup (tree decl)
1836 tree type = TREE_TYPE (decl);
1838 /* This function should only be called for declarations that really
1839 require cleanups. */
1840 my_friendly_assert (!TYPE_HAS_TRIVIAL_DESTRUCTOR (type), 20030106);
1842 /* Treat all objects with destructors as used; the destructor may do
1843 something substantive. */
1846 if (TREE_CODE (type) == ARRAY_TYPE)
1850 cxx_mark_addressable (decl);
1851 temp = build1 (ADDR_EXPR, build_pointer_type (type), decl);
1853 temp = build_delete (TREE_TYPE (temp), temp,
1854 sfk_complete_destructor,
1855 LOOKUP_NORMAL|LOOKUP_NONVIRTUAL|LOOKUP_DESTRUCTOR, 0);
1859 /* Returns the initialization guard variable for the variable DECL,
1860 which has static storage duration. */
1863 get_guard (tree decl)
1868 sname = mangle_guard_variable (decl);
1869 guard = IDENTIFIER_GLOBAL_VALUE (sname);
1874 /* We use a type that is big enough to contain a mutex as well
1875 as an integer counter. */
1876 guard_type = long_long_integer_type_node;
1877 guard = build_decl (VAR_DECL, sname, guard_type);
1879 /* The guard should have the same linkage as what it guards. */
1880 TREE_PUBLIC (guard) = TREE_PUBLIC (decl);
1881 TREE_STATIC (guard) = TREE_STATIC (decl);
1882 DECL_COMMON (guard) = DECL_COMMON (decl);
1883 DECL_ONE_ONLY (guard) = DECL_ONE_ONLY (decl);
1884 if (TREE_PUBLIC (decl))
1885 DECL_WEAK (guard) = DECL_WEAK (decl);
1887 DECL_ARTIFICIAL (guard) = 1;
1888 TREE_USED (guard) = 1;
1889 pushdecl_top_level (guard);
1890 cp_finish_decl (guard, NULL_TREE, NULL_TREE, 0);
1895 /* Return those bits of the GUARD variable that should be set when the
1896 guarded entity is actually initialized. */
1899 get_guard_bits (tree guard)
1901 /* We only set the first byte of the guard, in order to leave room
1902 for a mutex in the high-order bits. */
1903 guard = build1 (ADDR_EXPR,
1904 build_pointer_type (TREE_TYPE (guard)),
1906 guard = build1 (NOP_EXPR,
1907 build_pointer_type (char_type_node),
1909 guard = build1 (INDIRECT_REF, char_type_node, guard);
1914 /* Return an expression which determines whether or not the GUARD
1915 variable has already been initialized. */
1918 get_guard_cond (tree guard)
1922 /* Check to see if the GUARD is zero. */
1923 guard = get_guard_bits (guard);
1924 guard_value = integer_zero_node;
1925 if (!same_type_p (TREE_TYPE (guard_value), TREE_TYPE (guard)))
1926 guard_value = convert (TREE_TYPE (guard), guard_value);
1927 return cp_build_binary_op (EQ_EXPR, guard, guard_value);
1930 /* Return an expression which sets the GUARD variable, indicating that
1931 the variable being guarded has been initialized. */
1934 set_guard (tree guard)
1938 /* Set the GUARD to one. */
1939 guard = get_guard_bits (guard);
1940 guard_init = integer_one_node;
1941 if (!same_type_p (TREE_TYPE (guard_init), TREE_TYPE (guard)))
1942 guard_init = convert (TREE_TYPE (guard), guard_init);
1943 return build_modify_expr (guard, NOP_EXPR, guard_init);
1946 /* Start the process of running a particular set of global constructors
1947 or destructors. Subroutine of do_[cd]tors. */
1950 start_objects (int method_type, int initp)
1956 /* Make ctor or dtor function. METHOD_TYPE may be 'I' or 'D'. */
1958 if (initp != DEFAULT_INIT_PRIORITY)
1968 sprintf (type, "%c%c%.5u", method_type, joiner, initp);
1971 sprintf (type, "%c", method_type);
1973 fnname = get_file_function_name_long (type);
1975 start_function (void_list_node,
1976 make_call_declarator (fnname, void_list_node, NULL_TREE,
1978 NULL_TREE, SF_DEFAULT);
1980 /* It can be a static function as long as collect2 does not have
1981 to scan the object file to find its ctor/dtor routine. */
1982 TREE_PUBLIC (current_function_decl) = ! targetm.have_ctors_dtors;
1984 /* Mark this declaration as used to avoid spurious warnings. */
1985 TREE_USED (current_function_decl) = 1;
1987 /* Mark this function as a global constructor or destructor. */
1988 if (method_type == 'I')
1989 DECL_GLOBAL_CTOR_P (current_function_decl) = 1;
1991 DECL_GLOBAL_DTOR_P (current_function_decl) = 1;
1992 DECL_LANG_SPECIFIC (current_function_decl)->decl_flags.u2sel = 1;
1994 body = begin_compound_stmt (/*has_no_scope=*/0);
1996 /* We cannot allow these functions to be elided, even if they do not
1997 have external linkage. And, there's no point in deferring
1998 copmilation of thes functions; they're all going to have to be
2000 current_function_cannot_inline
2001 = "static constructors and destructors cannot be inlined";
2006 /* Finish the process of running a particular set of global constructors
2007 or destructors. Subroutine of do_[cd]tors. */
2010 finish_objects (int method_type, int initp, tree body)
2015 finish_compound_stmt (/*has_no_scope=*/0, body);
2016 fn = finish_function (0);
2019 /* When only doing semantic analysis, and no RTL generation, we
2020 can't call functions that directly emit assembly code; there is
2021 no assembly file in which to put the code. */
2022 if (flag_syntax_only)
2025 if (targetm.have_ctors_dtors)
2027 rtx fnsym = XEXP (DECL_RTL (fn), 0);
2028 if (method_type == 'I')
2029 (* targetm.asm_out.constructor) (fnsym, initp);
2031 (* targetm.asm_out.destructor) (fnsym, initp);
2035 /* The names of the parameters to the function created to handle
2036 initializations and destructions for objects with static storage
2038 #define INITIALIZE_P_IDENTIFIER "__initialize_p"
2039 #define PRIORITY_IDENTIFIER "__priority"
2041 /* The name of the function we create to handle initializations and
2042 destructions for objects with static storage duration. */
2043 #define SSDF_IDENTIFIER "__static_initialization_and_destruction"
2045 /* The declaration for the __INITIALIZE_P argument. */
2046 static GTY(()) tree initialize_p_decl;
2048 /* The declaration for the __PRIORITY argument. */
2049 static GTY(()) tree priority_decl;
2051 /* The declaration for the static storage duration function. */
2052 static GTY(()) tree ssdf_decl;
2054 /* All the static storage duration functions created in this
2055 translation unit. */
2056 static GTY(()) varray_type ssdf_decls;
2058 /* A map from priority levels to information about that priority
2059 level. There may be many such levels, so efficient lookup is
2061 static splay_tree priority_info_map;
2063 /* Begins the generation of the function that will handle all
2064 initialization and destruction of objects with static storage
2065 duration. The function generated takes two parameters of type
2066 `int': __INITIALIZE_P and __PRIORITY. If __INITIALIZE_P is
2067 nonzero, it performs initializations. Otherwise, it performs
2068 destructions. It only performs those initializations or
2069 destructions with the indicated __PRIORITY. The generated function
2072 It is assumed that this function will only be called once per
2073 translation unit. */
2076 start_static_storage_duration_function (unsigned count)
2081 char id[sizeof (SSDF_IDENTIFIER) + 1 /* '\0' */ + 32];
2083 /* Create the identifier for this function. It will be of the form
2084 SSDF_IDENTIFIER_<number>. */
2085 sprintf (id, "%s_%u", SSDF_IDENTIFIER, count);
2087 /* Create the parameters. */
2088 parm_types = void_list_node;
2089 parm_types = tree_cons (NULL_TREE, integer_type_node, parm_types);
2090 parm_types = tree_cons (NULL_TREE, integer_type_node, parm_types);
2091 type = build_function_type (void_type_node, parm_types);
2093 /* Create the FUNCTION_DECL itself. */
2094 ssdf_decl = build_lang_decl (FUNCTION_DECL,
2095 get_identifier (id),
2097 TREE_PUBLIC (ssdf_decl) = 0;
2098 DECL_ARTIFICIAL (ssdf_decl) = 1;
2100 /* Put this function in the list of functions to be called from the
2101 static constructors and destructors. */
2104 VARRAY_TREE_INIT (ssdf_decls, 32, "ssdf_decls");
2106 /* Take this opportunity to initialize the map from priority
2107 numbers to information about that priority level. */
2108 priority_info_map = splay_tree_new (splay_tree_compare_ints,
2109 /*delete_key_fn=*/0,
2110 /*delete_value_fn=*/
2111 (splay_tree_delete_value_fn) &free);
2113 /* We always need to generate functions for the
2114 DEFAULT_INIT_PRIORITY so enter it now. That way when we walk
2115 priorities later, we'll be sure to find the
2116 DEFAULT_INIT_PRIORITY. */
2117 get_priority_info (DEFAULT_INIT_PRIORITY);
2120 VARRAY_PUSH_TREE (ssdf_decls, ssdf_decl);
2122 /* Create the argument list. */
2123 initialize_p_decl = cp_build_parm_decl
2124 (get_identifier (INITIALIZE_P_IDENTIFIER), integer_type_node);
2125 DECL_CONTEXT (initialize_p_decl) = ssdf_decl;
2126 TREE_USED (initialize_p_decl) = 1;
2127 priority_decl = cp_build_parm_decl
2128 (get_identifier (PRIORITY_IDENTIFIER), integer_type_node);
2129 DECL_CONTEXT (priority_decl) = ssdf_decl;
2130 TREE_USED (priority_decl) = 1;
2132 TREE_CHAIN (initialize_p_decl) = priority_decl;
2133 DECL_ARGUMENTS (ssdf_decl) = initialize_p_decl;
2135 /* Put the function in the global scope. */
2136 pushdecl (ssdf_decl);
2138 /* Start the function itself. This is equivalent to declarating the
2141 static void __ssdf (int __initialize_p, init __priority_p);
2143 It is static because we only need to call this function from the
2144 various constructor and destructor functions for this module. */
2145 start_function (/*specs=*/NULL_TREE,
2147 /*attrs=*/NULL_TREE,
2150 /* Set up the scope of the outermost block in the function. */
2151 body = begin_compound_stmt (/*has_no_scope=*/0);
2153 /* This function must not be deferred because we are depending on
2154 its compilation to tell us what is TREE_SYMBOL_REFERENCED. */
2155 current_function_cannot_inline
2156 = "static storage duration functions cannot be inlined";
2161 /* Finish the generation of the function which performs initialization
2162 and destruction of objects with static storage duration. After
2163 this point, no more such objects can be created. */
2166 finish_static_storage_duration_function (tree body)
2168 /* Close out the function. */
2169 finish_compound_stmt (/*has_no_scope=*/0, body);
2170 expand_body (finish_function (0));
2173 /* Return the information about the indicated PRIORITY level. If no
2174 code to handle this level has yet been generated, generate the
2175 appropriate prologue. */
2177 static priority_info
2178 get_priority_info (int priority)
2183 n = splay_tree_lookup (priority_info_map,
2184 (splay_tree_key) priority);
2187 /* Create a new priority information structure, and insert it
2189 pi = (priority_info) xmalloc (sizeof (struct priority_info_s));
2190 pi->initializations_p = 0;
2191 pi->destructions_p = 0;
2192 splay_tree_insert (priority_info_map,
2193 (splay_tree_key) priority,
2194 (splay_tree_value) pi);
2197 pi = (priority_info) n->value;
2202 /* Set up to handle the initialization or destruction of DECL. If
2203 INITP is nonzero, we are initializing the variable. Otherwise, we
2204 are destroying it. */
2207 start_static_initialization_or_destruction (tree decl, int initp)
2209 tree guard_if_stmt = NULL_TREE;
2216 /* Figure out the priority for this declaration. */
2217 priority = DECL_INIT_PRIORITY (decl);
2219 priority = DEFAULT_INIT_PRIORITY;
2221 /* Remember that we had an initialization or finalization at this
2223 pi = get_priority_info (priority);
2225 pi->initializations_p = 1;
2227 pi->destructions_p = 1;
2229 /* Trick the compiler into thinking we are at the file and line
2230 where DECL was declared so that error-messages make sense, and so
2231 that the debugger will show somewhat sensible file and line
2233 input_location = DECL_SOURCE_LOCATION (decl);
2239 Access control for implicit calls to the constructors,
2240 the conversion functions, or the destructor called to
2241 create and destroy a static data member is performed as
2242 if these calls appeared in the scope of the member's
2245 we pretend we are in a static member function of the class of
2246 which the DECL is a member. */
2247 if (member_p (decl))
2249 DECL_CONTEXT (current_function_decl) = DECL_CONTEXT (decl);
2250 DECL_STATIC_FUNCTION_P (current_function_decl) = 1;
2253 /* Conditionalize this initialization on being in the right priority
2254 and being initializing/finalizing appropriately. */
2255 guard_if_stmt = begin_if_stmt ();
2256 cond = cp_build_binary_op (EQ_EXPR,
2258 build_int_2 (priority, 0));
2259 init_cond = initp ? integer_one_node : integer_zero_node;
2260 init_cond = cp_build_binary_op (EQ_EXPR,
2263 cond = cp_build_binary_op (TRUTH_ANDIF_EXPR, cond, init_cond);
2265 /* Assume we don't need a guard. */
2267 /* We need a guard if this is an object with external linkage that
2268 might be initialized in more than one place. (For example, a
2269 static data member of a template, when the data member requires
2271 if (TREE_PUBLIC (decl) && (DECL_COMMON (decl)
2272 || DECL_ONE_ONLY (decl)
2273 || DECL_WEAK (decl)))
2277 guard = get_guard (decl);
2279 /* When using __cxa_atexit, we just check the GUARD as we would
2280 for a local static. */
2281 if (flag_use_cxa_atexit)
2283 /* When using __cxa_atexit, we never try to destroy
2284 anything from a static destructor. */
2285 my_friendly_assert (initp, 20000629);
2286 guard_cond = get_guard_cond (guard);
2288 /* If we don't have __cxa_atexit, then we will be running
2289 destructors from .fini sections, or their equivalents. So,
2290 we need to know how many times we've tried to initialize this
2291 object. We do initializations only if the GUARD is zero,
2292 i.e., if we are the first to initialize the variable. We do
2293 destructions only if the GUARD is one, i.e., if we are the
2294 last to destroy the variable. */
2297 = cp_build_binary_op (EQ_EXPR,
2298 build_unary_op (PREINCREMENT_EXPR,
2304 = cp_build_binary_op (EQ_EXPR,
2305 build_unary_op (PREDECREMENT_EXPR,
2310 cond = cp_build_binary_op (TRUTH_ANDIF_EXPR, cond, guard_cond);
2313 finish_if_stmt_cond (cond, guard_if_stmt);
2315 /* If we're using __cxa_atexit, we have not already set the GUARD,
2316 so we must do so now. */
2317 if (guard && initp && flag_use_cxa_atexit)
2318 finish_expr_stmt (set_guard (guard));
2320 return guard_if_stmt;
2323 /* We've just finished generating code to do an initialization or
2324 finalization. GUARD_IF_STMT is the if-statement we used to guard
2325 the initialization. */
2328 finish_static_initialization_or_destruction (tree guard_if_stmt)
2330 finish_then_clause (guard_if_stmt);
2333 /* Now that we're done with DECL we don't need to pretend to be a
2334 member of its class any longer. */
2335 DECL_CONTEXT (current_function_decl) = NULL_TREE;
2336 DECL_STATIC_FUNCTION_P (current_function_decl) = 0;
2339 /* Generate code to do the initialization of DECL, a VAR_DECL with
2340 static storage duration. The initialization is INIT. */
2343 do_static_initialization (tree decl, tree init)
2347 /* Set up for the initialization. */
2349 = start_static_initialization_or_destruction (decl,
2352 /* Perform the initialization. */
2354 finish_expr_stmt (init);
2356 /* If we're using __cxa_atexit, register a a function that calls the
2357 destructor for the object. */
2358 if (flag_use_cxa_atexit)
2359 register_dtor_fn (decl);
2362 finish_static_initialization_or_destruction (guard_if_stmt);
2365 /* Generate code to do the static destruction of DECL. If DECL may be
2366 initialized more than once in different object files, GUARD is the
2367 guard variable to check. PRIORITY is the priority for the
2371 do_static_destruction (tree decl)
2375 /* If we're using __cxa_atexit, then destructors are registered
2376 immediately after objects are initialized. */
2377 my_friendly_assert (!flag_use_cxa_atexit, 20000121);
2379 /* If we don't need a destructor, there's nothing to do. */
2380 if (TYPE_HAS_TRIVIAL_DESTRUCTOR (TREE_TYPE (decl)))
2383 /* Actually do the destruction. */
2384 guard_if_stmt = start_static_initialization_or_destruction (decl,
2386 finish_expr_stmt (build_cleanup (decl));
2387 finish_static_initialization_or_destruction (guard_if_stmt);
2390 /* VARS is a list of variables with static storage duration which may
2391 need initialization and/or finalization. Remove those variables
2392 that don't really need to be initialized or finalized, and return
2393 the resulting list. The order in which the variables appear in
2394 VARS is in reverse order of the order in which they should actually
2395 be initialized. The list we return is in the unreversed order;
2396 i.e., the first variable should be initialized first. */
2399 prune_vars_needing_no_initialization (tree *vars)
2402 tree result = NULL_TREE;
2407 tree decl = TREE_VALUE (t);
2408 tree init = TREE_PURPOSE (t);
2410 /* Deal gracefully with error. */
2411 if (decl == error_mark_node)
2413 var = &TREE_CHAIN (t);
2417 /* The only things that can be initialized are variables. */
2418 my_friendly_assert (TREE_CODE (decl) == VAR_DECL, 19990420);
2420 /* If this object is not defined, we don't need to do anything
2422 if (DECL_EXTERNAL (decl))
2424 var = &TREE_CHAIN (t);
2428 /* Also, if the initializer already contains errors, we can bail
2430 if (init && TREE_CODE (init) == TREE_LIST
2431 && value_member (error_mark_node, init))
2433 var = &TREE_CHAIN (t);
2437 /* This variable is going to need initialization and/or
2438 finalization, so we add it to the list. */
2439 *var = TREE_CHAIN (t);
2440 TREE_CHAIN (t) = result;
2447 /* Make sure we have told the back end about all the variables in
2451 write_out_vars (tree vars)
2455 for (v = vars; v; v = TREE_CHAIN (v))
2456 if (! TREE_ASM_WRITTEN (TREE_VALUE (v)))
2457 rest_of_decl_compilation (TREE_VALUE (v), 0, 1, 1);
2460 /* Generate a static constructor (if CONSTRUCTOR_P) or destructor
2461 (otherwise) that will initialize all gobal objects with static
2462 storage duration having the indicated PRIORITY. */
2465 generate_ctor_or_dtor_function (bool constructor_p, int priority,
2474 input_location = *locus;
2477 /* We use `I' to indicate initialization and `D' to indicate
2479 function_key = constructor_p ? 'I' : 'D';
2481 /* We emit the function lazily, to avoid generating empty
2482 global constructors and destructors. */
2485 /* Call the static storage duration function with appropriate
2488 for (i = 0; i < ssdf_decls->elements_used; ++i)
2490 fndecl = VARRAY_TREE (ssdf_decls, i);
2492 /* Calls to pure or const functions will expand to nothing. */
2493 if (! (flags_from_decl_or_type (fndecl) & (ECF_CONST | ECF_PURE)))
2496 body = start_objects (function_key, priority);
2498 arguments = tree_cons (NULL_TREE, build_int_2 (priority, 0),
2500 arguments = tree_cons (NULL_TREE, build_int_2 (constructor_p, 0),
2502 finish_expr_stmt (build_function_call (fndecl, arguments));
2506 /* If we're generating code for the DEFAULT_INIT_PRIORITY, throw in
2507 calls to any functions marked with attributes indicating that
2508 they should be called at initialization- or destruction-time. */
2509 if (priority == DEFAULT_INIT_PRIORITY)
2513 for (fns = constructor_p ? static_ctors : static_dtors;
2515 fns = TREE_CHAIN (fns))
2517 fndecl = TREE_VALUE (fns);
2519 /* Calls to pure/const functions will expand to nothing. */
2520 if (! (flags_from_decl_or_type (fndecl) & (ECF_CONST | ECF_PURE)))
2523 body = start_objects (function_key, priority);
2524 finish_expr_stmt (build_function_call (fndecl, NULL_TREE));
2529 /* Close out the function. */
2531 finish_objects (function_key, priority, body);
2534 /* Generate constructor and destructor functions for the priority
2538 generate_ctor_and_dtor_functions_for_priority (splay_tree_node n, void * data)
2540 location_t *locus = data;
2541 int priority = (int) n->key;
2542 priority_info pi = (priority_info) n->value;
2544 /* Generate the functions themselves, but only if they are really
2546 if (pi->initializations_p
2547 || (priority == DEFAULT_INIT_PRIORITY && static_ctors))
2548 generate_ctor_or_dtor_function (/*constructor_p=*/true, priority, locus);
2549 if (pi->destructions_p
2550 || (priority == DEFAULT_INIT_PRIORITY && static_dtors))
2551 generate_ctor_or_dtor_function (/*constructor_p=*/false, priority, locus);
2553 /* Keep iterating. */
2557 /* This routine is called from the last rule in yyparse ().
2558 Its job is to create all the code needed to initialize and
2559 destroy the global aggregates. We do the destruction
2560 first, since that way we only need to reverse the decls once. */
2569 unsigned ssdf_count = 0;
2571 locus = input_location;
2574 /* Bad parse errors. Just forget about it. */
2575 if (! global_bindings_p () || current_class_type || decl_namespace_list)
2579 c_common_write_pch ();
2581 /* Otherwise, GDB can get confused, because in only knows
2582 about source for LINENO-1 lines. */
2585 interface_unknown = 1;
2588 /* We now have to write out all the stuff we put off writing out.
2591 o Template specializations that we have not yet instantiated,
2592 but which are needed.
2593 o Initialization and destruction for non-local objects with
2594 static storage duration. (Local objects with static storage
2595 duration are initialized when their scope is first entered,
2596 and are cleaned up via atexit.)
2597 o Virtual function tables.
2599 All of these may cause others to be needed. For example,
2600 instantiating one function may cause another to be needed, and
2601 generating the initializer for an object may cause templates to be
2602 instantiated, etc., etc. */
2604 timevar_push (TV_VARCONST);
2606 emit_support_tinfos ();
2611 size_t n_old, n_new;
2615 /* If there are templates that we've put off instantiating, do
2617 instantiate_pending_templates ();
2619 /* Write out virtual tables as required. Note that writing out
2620 the virtual table for a template class may cause the
2621 instantiation of members of that class. If we write out
2622 vtables then we remove the class from our list so we don't
2623 have to look at it again. */
2625 while (keyed_classes != NULL_TREE
2626 && maybe_emit_vtables (TREE_VALUE (keyed_classes)))
2629 keyed_classes = TREE_CHAIN (keyed_classes);
2635 tree next = TREE_CHAIN (t);
2639 if (maybe_emit_vtables (TREE_VALUE (next)))
2642 TREE_CHAIN (t) = TREE_CHAIN (next);
2647 next = TREE_CHAIN (t);
2651 /* Write out needed type info variables. We have to be careful
2652 looping through unemitted decls, because emit_tinfo_decl may
2653 cause other variables to be needed. We stick new elements
2654 (and old elements that we may need to reconsider) at the end
2655 of the array, then shift them back to the beginning once we're
2658 n_old = VARRAY_ACTIVE_SIZE (unemitted_tinfo_decls);
2659 for (i = 0; i < n_old; ++i)
2661 tree tinfo_decl = VARRAY_TREE (unemitted_tinfo_decls, i);
2662 if (emit_tinfo_decl (tinfo_decl))
2665 VARRAY_PUSH_TREE (unemitted_tinfo_decls, tinfo_decl);
2668 /* The only elements we want to keep are the new ones. Copy
2669 them to the beginning of the array, then get rid of the
2671 n_new = VARRAY_ACTIVE_SIZE (unemitted_tinfo_decls) - n_old;
2672 memmove (&VARRAY_TREE (unemitted_tinfo_decls, 0),
2673 &VARRAY_TREE (unemitted_tinfo_decls, n_old),
2674 n_new * sizeof (tree));
2675 memset (&VARRAY_TREE (unemitted_tinfo_decls, n_new),
2677 n_old * sizeof (tree));
2678 VARRAY_ACTIVE_SIZE (unemitted_tinfo_decls) = n_new;
2680 /* The list of objects with static storage duration is built up
2681 in reverse order. We clear STATIC_AGGREGATES so that any new
2682 aggregates added during the initialization of these will be
2683 initialized in the correct order when we next come around the
2685 vars = prune_vars_needing_no_initialization (&static_aggregates);
2691 /* We need to start a new initialization function each time
2692 through the loop. That's because we need to know which
2693 vtables have been referenced, and TREE_SYMBOL_REFERENCED
2694 isn't computed until a function is finished, and written
2695 out. That's a deficiency in the back-end. When this is
2696 fixed, these initialization functions could all become
2697 inline, with resulting performance improvements. */
2700 /* Set the line and file, so that it is obviously not from
2702 input_location = locus;
2703 ssdf_body = start_static_storage_duration_function (ssdf_count);
2705 /* Make sure the back end knows about all the variables. */
2706 write_out_vars (vars);
2708 /* First generate code to do all the initializations. */
2709 for (v = vars; v; v = TREE_CHAIN (v))
2710 do_static_initialization (TREE_VALUE (v),
2713 /* Then, generate code to do all the destructions. Do these
2714 in reverse order so that the most recently constructed
2715 variable is the first destroyed. If we're using
2716 __cxa_atexit, then we don't need to do this; functions
2717 were registered at initialization time to destroy the
2719 if (!flag_use_cxa_atexit)
2721 vars = nreverse (vars);
2722 for (v = vars; v; v = TREE_CHAIN (v))
2723 do_static_destruction (TREE_VALUE (v));
2728 /* Finish up the static storage duration function for this
2730 input_location = locus;
2731 finish_static_storage_duration_function (ssdf_body);
2733 /* All those initializations and finalizations might cause
2734 us to need more inline functions, more template
2735 instantiations, etc. */
2741 for (i = 0; i < deferred_fns_used; ++i)
2743 tree decl = VARRAY_TREE (deferred_fns, i);
2745 /* Does it need synthesizing? */
2746 if (DECL_ARTIFICIAL (decl) && ! DECL_INITIAL (decl)
2748 && (! DECL_REALLY_EXTERN (decl) || DECL_INLINE (decl)))
2750 /* Even though we're already at the top-level, we push
2751 there again. That way, when we pop back a few lines
2752 hence, all of our state is restored. Otherwise,
2753 finish_function doesn't clean things up, and we end
2754 up with CURRENT_FUNCTION_DECL set. */
2755 push_to_top_level ();
2756 synthesize_method (decl);
2757 pop_from_top_level ();
2761 /* If the function has no body, avoid calling
2762 import_export_decl. On a system without weak symbols,
2763 calling import_export_decl will make an inline template
2764 instantiation "static", which will result in errors about
2765 the use of undefined functions if there is no body for
2767 if (!DECL_SAVED_TREE (decl))
2770 import_export_decl (decl);
2772 /* We lie to the back-end, pretending that some functions
2773 are not defined when they really are. This keeps these
2774 functions from being put out unnecessarily. But, we must
2775 stop lying when the functions are referenced, or if they
2776 are not comdat since they need to be put out now. This
2777 is done in a separate for cycle, because if some deferred
2778 function is contained in another deferred function later
2779 in deferred_fns varray, rest_of_compilation would skip
2780 this function and we really cannot expand the same
2782 if (DECL_NOT_REALLY_EXTERN (decl)
2783 && DECL_INITIAL (decl)
2784 && DECL_NEEDED_P (decl))
2785 DECL_EXTERNAL (decl) = 0;
2787 /* If we're going to need to write this function out, and
2788 there's already a body for it, create RTL for it now.
2789 (There might be no body if this is a method we haven't
2790 gotten around to synthesizing yet.) */
2791 if (!DECL_EXTERNAL (decl)
2792 && DECL_NEEDED_P (decl)
2793 && DECL_SAVED_TREE (decl)
2794 && !TREE_ASM_WRITTEN (decl))
2796 int saved_not_really_extern;
2798 /* When we call finish_function in expand_body, it will
2799 try to reset DECL_NOT_REALLY_EXTERN so we save and
2801 saved_not_really_extern = DECL_NOT_REALLY_EXTERN (decl);
2802 /* Generate RTL for this function now that we know we
2805 /* Undo the damage done by finish_function. */
2806 DECL_EXTERNAL (decl) = 0;
2807 DECL_NOT_REALLY_EXTERN (decl) = saved_not_really_extern;
2808 /* If we're compiling -fsyntax-only pretend that this
2809 function has been written out so that we don't try to
2811 if (flag_syntax_only)
2812 TREE_ASM_WRITTEN (decl) = 1;
2817 if (deferred_fns_used
2818 && wrapup_global_declarations (&VARRAY_TREE (deferred_fns, 0),
2821 if (walk_namespaces (wrapup_globals_for_namespace, /*data=*/0))
2824 /* Static data members are just like namespace-scope globals. */
2825 for (i = 0; i < pending_statics_used; ++i)
2827 tree decl = VARRAY_TREE (pending_statics, i);
2828 if (TREE_ASM_WRITTEN (decl))
2830 import_export_decl (decl);
2831 if (DECL_NOT_REALLY_EXTERN (decl) && ! DECL_IN_AGGR_P (decl))
2832 DECL_EXTERNAL (decl) = 0;
2835 && wrapup_global_declarations (&VARRAY_TREE (pending_statics, 0),
2836 pending_statics_used))
2841 /* All used inline functions must have a definition at this point. */
2842 for (i = 0; i < deferred_fns_used; ++i)
2844 tree decl = VARRAY_TREE (deferred_fns, i);
2846 if (TREE_USED (decl) && DECL_DECLARED_INLINE_P (decl)
2847 && !(TREE_ASM_WRITTEN (decl) || DECL_SAVED_TREE (decl)
2848 /* An explicit instantiation can be used to specify
2849 that the body is in another unit. It will have
2850 already verified there was a definition. */
2851 || DECL_EXPLICIT_INSTANTIATION (decl)))
2853 cp_warning_at ("inline function `%D' used but never defined", decl);
2854 /* This symbol is effectively an "extern" declaration now.
2855 This is not strictly necessary, but removes a duplicate
2857 TREE_PUBLIC (decl) = 1;
2862 /* We give C linkage to static constructors and destructors. */
2863 push_lang_context (lang_name_c);
2865 /* Generate initialization and destruction functions for all
2866 priorities for which they are required. */
2867 if (priority_info_map)
2868 splay_tree_foreach (priority_info_map,
2869 generate_ctor_and_dtor_functions_for_priority,
2875 generate_ctor_or_dtor_function (/*constructor_p=*/true,
2876 DEFAULT_INIT_PRIORITY, &locus);
2878 generate_ctor_or_dtor_function (/*constructor_p=*/false,
2879 DEFAULT_INIT_PRIORITY, &locus);
2882 /* We're done with the splay-tree now. */
2883 if (priority_info_map)
2884 splay_tree_delete (priority_info_map);
2886 /* We're done with static constructors, so we can go back to "C++"
2888 pop_lang_context ();
2890 /* Now, issue warnings about static, but not defined, functions,
2891 etc., and emit debugging information. */
2892 walk_namespaces (wrapup_globals_for_namespace, /*data=*/&reconsider);
2893 if (pending_statics)
2894 check_global_declarations (&VARRAY_TREE (pending_statics, 0),
2895 pending_statics_used);
2899 /* The entire file is now complete. If requested, dump everything
2903 FILE *stream = dump_begin (TDI_all, &flags);
2907 dump_node (global_namespace, flags & ~TDF_SLIM, stream);
2908 dump_end (TDI_all, stream);
2912 timevar_pop (TV_VARCONST);
2914 if (flag_detailed_statistics)
2916 dump_tree_statistics ();
2917 dump_time_statistics ();
2919 input_location = locus;
2922 /* T is the parse tree for an expression. Return the expression after
2923 performing semantic analysis. */
2926 build_expr_from_tree (t)
2929 if (t == NULL_TREE || t == error_mark_node)
2932 switch (TREE_CODE (t))
2934 case IDENTIFIER_NODE:
2935 return do_identifier (t, NULL_TREE);
2938 if (LOOKUP_EXPR_GLOBAL (t))
2940 tree token = TREE_OPERAND (t, 0);
2941 return do_scoped_id (token, IDENTIFIER_GLOBAL_VALUE (token));
2945 t = do_identifier (TREE_OPERAND (t, 0), NULL_TREE);
2946 if (TREE_CODE (t) == ALIAS_DECL)
2947 t = DECL_INITIAL (t);
2951 case TEMPLATE_ID_EXPR:
2957 template = build_expr_from_tree (TREE_OPERAND (t, 0));
2958 args = build_expr_from_tree (TREE_OPERAND (t, 1));
2960 if (TREE_CODE (template) == COMPONENT_REF)
2962 object = TREE_OPERAND (template, 0);
2963 template = TREE_OPERAND (template, 1);
2968 template = lookup_template_function (template, args);
2970 return build (COMPONENT_REF, TREE_TYPE (template),
2977 return build_x_indirect_ref
2978 (build_expr_from_tree (TREE_OPERAND (t, 0)), "unary *");
2981 return build_functional_cast
2982 (TREE_TYPE (t), build_expr_from_tree (TREE_OPERAND (t, 0)));
2984 case REINTERPRET_CAST_EXPR:
2985 return build_reinterpret_cast
2986 (TREE_TYPE (t), build_expr_from_tree (TREE_OPERAND (t, 0)));
2988 case CONST_CAST_EXPR:
2989 return build_const_cast
2990 (TREE_TYPE (t), build_expr_from_tree (TREE_OPERAND (t, 0)));
2992 case DYNAMIC_CAST_EXPR:
2993 return build_dynamic_cast
2994 (TREE_TYPE (t), build_expr_from_tree (TREE_OPERAND (t, 0)));
2996 case STATIC_CAST_EXPR:
2997 return build_static_cast
2998 (TREE_TYPE (t), build_expr_from_tree (TREE_OPERAND (t, 0)));
3000 case PREDECREMENT_EXPR:
3001 case PREINCREMENT_EXPR:
3002 case POSTDECREMENT_EXPR:
3003 case POSTINCREMENT_EXPR:
3007 case TRUTH_NOT_EXPR:
3009 case CONVERT_EXPR: /* Unary + */
3014 return build_x_unary_op (TREE_CODE (t),
3015 build_expr_from_tree (TREE_OPERAND (t, 0)));
3020 case TRUNC_DIV_EXPR:
3022 case FLOOR_DIV_EXPR:
3023 case ROUND_DIV_EXPR:
3024 case EXACT_DIV_EXPR:
3026 case BIT_ANDTC_EXPR:
3029 case TRUNC_MOD_EXPR:
3030 case FLOOR_MOD_EXPR:
3031 case TRUTH_ANDIF_EXPR:
3032 case TRUTH_ORIF_EXPR:
3033 case TRUTH_AND_EXPR:
3048 return build_x_binary_op
3050 build_expr_from_tree (TREE_OPERAND (t, 0)),
3051 build_expr_from_tree (TREE_OPERAND (t, 1)));
3054 return build_m_component_ref
3055 (build_expr_from_tree (TREE_OPERAND (t, 0)),
3056 build_expr_from_tree (TREE_OPERAND (t, 1)));
3059 return build_offset_ref (TREE_OPERAND (t, 0), TREE_OPERAND (t, 1));
3062 if (TREE_OPERAND (t, 0) == NULL_TREE)
3064 return build_nt (ARRAY_REF, NULL_TREE,
3065 build_expr_from_tree (TREE_OPERAND (t, 1)));
3066 return grok_array_decl (build_expr_from_tree (TREE_OPERAND (t, 0)),
3067 build_expr_from_tree (TREE_OPERAND (t, 1)));
3072 tree r = build_expr_from_tree (TREE_OPERAND (t, 0));
3074 return TREE_CODE (t) == SIZEOF_EXPR ? expr_sizeof (r) : c_alignof_expr (r);
3076 return cxx_sizeof_or_alignof_type (r, TREE_CODE (t), true);
3080 return build_x_modify_expr
3081 (build_expr_from_tree (TREE_OPERAND (t, 0)),
3082 TREE_CODE (TREE_OPERAND (t, 1)),
3083 build_expr_from_tree (TREE_OPERAND (t, 2)));
3086 return build_x_arrow
3087 (build_expr_from_tree (TREE_OPERAND (t, 0)));
3091 (build_expr_from_tree (TREE_OPERAND (t, 0)),
3092 build_expr_from_tree (TREE_OPERAND (t, 1)),
3093 build_expr_from_tree (TREE_OPERAND (t, 2)),
3094 NEW_EXPR_USE_GLOBAL (t));
3097 return delete_sanity
3098 (build_expr_from_tree (TREE_OPERAND (t, 0)),
3099 build_expr_from_tree (TREE_OPERAND (t, 1)),
3100 DELETE_EXPR_USE_VEC (t), DELETE_EXPR_USE_GLOBAL (t));
3103 if (TREE_OPERAND (t, 1) == NULL_TREE)
3104 return build_x_compound_expr
3105 (build_expr_from_tree (TREE_OPERAND (t, 0)));
3109 case METHOD_CALL_EXPR:
3110 if (TREE_CODE (TREE_OPERAND (t, 0)) == SCOPE_REF)
3112 tree ref = TREE_OPERAND (t, 0);
3113 tree name = TREE_OPERAND (ref, 1);
3115 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
3116 name = build_nt (TEMPLATE_ID_EXPR,
3117 TREE_OPERAND (name, 0),
3118 build_expr_from_tree (TREE_OPERAND (name, 1)));
3120 return build_scoped_method_call
3121 (build_expr_from_tree (TREE_OPERAND (t, 1)),
3122 build_expr_from_tree (TREE_OPERAND (ref, 0)),
3124 build_expr_from_tree (TREE_OPERAND (t, 2)));
3128 tree fn = TREE_OPERAND (t, 0);
3130 /* We can get a TEMPLATE_ID_EXPR here on code like:
3134 so we must resolve that. However, we can also get things
3135 like a BIT_NOT_EXPR here, when referring to a destructor,
3136 and things like that are not correctly resolved by
3137 build_expr_from_tree. So, just use build_expr_from_tree
3138 when we really need it. */
3139 if (TREE_CODE (fn) == TEMPLATE_ID_EXPR)
3140 fn = lookup_template_function
3141 (TREE_OPERAND (fn, 0),
3142 build_expr_from_tree (TREE_OPERAND (fn, 1)));
3144 return build_method_call
3145 (build_expr_from_tree (TREE_OPERAND (t, 1)),
3147 build_expr_from_tree (TREE_OPERAND (t, 2)),
3148 NULL_TREE, LOOKUP_NORMAL);
3152 if (TREE_CODE (TREE_OPERAND (t, 0)) == SCOPE_REF)
3154 tree ref = TREE_OPERAND (t, 0);
3155 tree name = TREE_OPERAND (ref, 1);
3156 tree fn, scope, args;
3158 if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
3159 name = build_nt (TEMPLATE_ID_EXPR,
3160 TREE_OPERAND (name, 0),
3161 build_expr_from_tree (TREE_OPERAND (name, 1)));
3163 scope = build_expr_from_tree (TREE_OPERAND (ref, 0));
3164 args = build_expr_from_tree (TREE_OPERAND (t, 1));
3165 fn = resolve_scoped_fn_name (scope, name);
3167 return build_call_from_tree (fn, args, 1);
3171 tree name = TREE_OPERAND (t, 0);
3173 tree args = build_expr_from_tree (TREE_OPERAND (t, 1));
3174 if (args != NULL_TREE && TREE_CODE (name) == LOOKUP_EXPR
3175 && !LOOKUP_EXPR_GLOBAL (name)
3176 && TREE_CODE ((id = TREE_OPERAND (name, 0))) == IDENTIFIER_NODE
3177 && (!current_class_type
3178 || !lookup_member (current_class_type, id, 0, false)))
3180 /* Do Koenig lookup if there are no class members. */
3181 name = do_identifier (id, args);
3183 else if (TREE_CODE (name) == TEMPLATE_ID_EXPR
3184 || ! really_overloaded_fn (name))
3185 name = build_expr_from_tree (name);
3187 if (TREE_CODE (name) == OFFSET_REF)
3188 return build_offset_ref_call_from_tree (name, args);
3189 if (TREE_CODE (name) == COMPONENT_REF)
3190 return finish_object_call_expr (TREE_OPERAND (name, 1),
3191 TREE_OPERAND (name, 0),
3193 name = convert_from_reference (name);
3194 return build_call_from_tree (name, args,
3195 /*disallow_virtual=*/false);
3199 return build_x_conditional_expr
3200 (build_expr_from_tree (TREE_OPERAND (t, 0)),
3201 build_expr_from_tree (TREE_OPERAND (t, 1)),
3202 build_expr_from_tree (TREE_OPERAND (t, 2)));
3204 case PSEUDO_DTOR_EXPR:
3205 return (finish_pseudo_destructor_expr
3206 (build_expr_from_tree (TREE_OPERAND (t, 0)),
3207 build_expr_from_tree (TREE_OPERAND (t, 1)),
3208 build_expr_from_tree (TREE_OPERAND (t, 2))));
3212 tree purpose, value, chain;
3214 if (t == void_list_node)
3217 purpose = TREE_PURPOSE (t);
3219 purpose = build_expr_from_tree (purpose);
3220 value = TREE_VALUE (t);
3222 value = build_expr_from_tree (value);
3223 chain = TREE_CHAIN (t);
3224 if (chain && chain != void_type_node)
3225 chain = build_expr_from_tree (chain);
3226 return tree_cons (purpose, value, chain);
3231 tree object = build_expr_from_tree (TREE_OPERAND (t, 0));
3232 tree member = TREE_OPERAND (t, 1);
3234 if (!CLASS_TYPE_P (TREE_TYPE (object)))
3236 if (TREE_CODE (member) == BIT_NOT_EXPR)
3237 return finish_pseudo_destructor_expr (object,
3239 TREE_TYPE (object));
3240 else if (TREE_CODE (member) == SCOPE_REF
3241 && (TREE_CODE (TREE_OPERAND (member, 1)) == BIT_NOT_EXPR))
3242 return finish_pseudo_destructor_expr (object,
3243 TREE_OPERAND (t, 0),
3244 TREE_TYPE (object));
3246 else if (TREE_CODE (member) == SCOPE_REF
3247 && TREE_CODE (TREE_OPERAND (member, 1)) == TEMPLATE_ID_EXPR)
3252 /* Lookup the template functions now that we know what the
3254 tmpl = TREE_OPERAND (TREE_OPERAND (member, 1), 0);
3255 args = TREE_OPERAND (TREE_OPERAND (member, 1), 1);
3256 member = lookup_qualified_name (TREE_OPERAND (member, 0),
3260 if (BASELINK_P (member))
3261 BASELINK_FUNCTIONS (member)
3262 = build_nt (TEMPLATE_ID_EXPR, BASELINK_FUNCTIONS (member),
3266 error ("`%D' is not a member of `%T'",
3267 tmpl, TREE_TYPE (object));
3268 return error_mark_node;
3273 return finish_class_member_access_expr (object, member);
3277 return build_throw (build_expr_from_tree (TREE_OPERAND (t, 0)));
3283 tree type = TREE_TYPE (t);
3286 /* digest_init will do the wrong thing if we let it. */
3287 if (type && TYPE_PTRMEMFUNC_P (type))
3291 /* We do not want to process the purpose of aggregate
3292 initializers as they are identifier nodes which will be
3293 looked up by digest_init. */
3294 purpose_p = !(type && IS_AGGR_TYPE (type));
3295 for (elts = CONSTRUCTOR_ELTS (t); elts; elts = TREE_CHAIN (elts))
3297 tree purpose = TREE_PURPOSE (elts);
3298 tree value = TREE_VALUE (elts);
3300 if (purpose && purpose_p)
3301 purpose = build_expr_from_tree (purpose);
3302 value = build_expr_from_tree (value);
3303 r = tree_cons (purpose, value, r);
3306 r = build_constructor (NULL_TREE, nreverse (r));
3307 TREE_HAS_CONSTRUCTOR (r) = TREE_HAS_CONSTRUCTOR (t);
3310 return digest_init (type, r, 0);
3315 if (TYPE_P (TREE_OPERAND (t, 0)))
3316 return get_typeid (TREE_OPERAND (t, 0));
3317 return build_typeid (build_expr_from_tree (TREE_OPERAND (t, 0)));
3321 return convert_from_reference (t);
3324 return build_va_arg (build_expr_from_tree (TREE_OPERAND (t, 0)),
3332 /* FN is an OFFSET_REF indicating the function to call in parse-tree
3333 form; it has not yet been semantically analyzed. ARGS are the
3334 arguments to the function. They have already been semantically
3338 build_offset_ref_call_from_tree (tree fn, tree args)
3342 my_friendly_assert (TREE_CODE (fn) == OFFSET_REF, 20020725);
3344 /* A qualified name corresponding to a non-static member
3345 function or a pointer-to-member is represented as an
3348 For both of these function calls, FN will be an OFFSET_REF.
3350 struct A { void f(); };
3351 void A::f() { (A::f) (); }
3353 struct B { void g(); };
3355 void B::g() { (this->*p)(); } */
3357 /* This code is not really correct (for example, it does not
3358 handle the case that `A::f' is overloaded), but it is
3359 historically how we have handled this situation. */
3360 if (TREE_CODE (TREE_OPERAND (fn, 1)) == FIELD_DECL)
3361 /* This case should now be handled elsewhere. */
3365 object_addr = build_unary_op (ADDR_EXPR, TREE_OPERAND (fn, 0), 0);
3366 fn = TREE_OPERAND (fn, 1);
3367 fn = get_member_function_from_ptrfunc (&object_addr, fn);
3368 args = tree_cons (NULL_TREE, object_addr, args);
3370 return build_function_call (fn, args);
3373 /* FN indicates the function to call. Name resolution has been
3374 performed on FN. ARGS are the arguments to the function. They
3375 have already been semantically analyzed. DISALLOW_VIRTUAL is true
3376 if the function call should be determined at compile time, even if
3380 build_call_from_tree (tree fn, tree args, bool disallow_virtual)
3386 /* Check to see that name lookup has already been performed. */
3387 my_friendly_assert (TREE_CODE (fn) != OFFSET_REF, 20020725);
3388 my_friendly_assert (TREE_CODE (fn) != SCOPE_REF, 20020725);
3390 /* In the future all of this should be eliminated. Instead,
3391 name-lookup for a member function should simply return a
3392 baselink, instead of a FUNCTION_DECL, TEMPLATE_DECL, or
3393 TEMPLATE_ID_EXPR. */
3395 if (TREE_CODE (fn) == TEMPLATE_ID_EXPR)
3398 template_args = TREE_OPERAND (fn, 1);
3399 fn = TREE_OPERAND (fn, 0);
3403 template_id = NULL_TREE;
3404 template_args = NULL_TREE;
3407 f = (TREE_CODE (fn) == OVERLOAD) ? get_first_fn (fn) : fn;
3408 /* Make sure we have a baselink (rather than simply a
3409 FUNCTION_DECL) for a member function. */
3410 if (current_class_type
3411 && ((TREE_CODE (f) == FUNCTION_DECL
3412 && DECL_FUNCTION_MEMBER_P (f))
3413 || (DECL_FUNCTION_TEMPLATE_P (f)
3414 && DECL_FUNCTION_MEMBER_P (f))))
3416 f = lookup_member (current_class_type, DECL_NAME (f),
3417 /*protect=*/1, /*want_type=*/false);
3424 if (BASELINK_P (fn))
3425 BASELINK_FUNCTIONS (fn) = build_nt (TEMPLATE_ID_EXPR,
3426 BASELINK_FUNCTIONS (fn),
3432 return finish_call_expr (fn, args, disallow_virtual);
3435 /* Returns true if ROOT (a namespace, class, or function) encloses
3436 CHILD. CHILD may be either a class type or a namespace. */
3439 is_ancestor (tree root, tree child)
3441 my_friendly_assert ((TREE_CODE (root) == NAMESPACE_DECL
3442 || TREE_CODE (root) == FUNCTION_DECL
3443 || CLASS_TYPE_P (root)), 20030307);
3444 my_friendly_assert ((TREE_CODE (child) == NAMESPACE_DECL
3445 || CLASS_TYPE_P (child)),
3448 /* The global namespace encloses everything. */
3449 if (root == global_namespace)
3454 /* If we've run out of scopes, stop. */
3457 /* If we've reached the ROOT, it encloses CHILD. */
3460 /* Go out one level. */
3462 child = TYPE_NAME (child);
3463 child = DECL_CONTEXT (child);
3468 /* Return the namespace that is the common ancestor
3469 of two given namespaces. */
3472 namespace_ancestor (tree ns1, tree ns2)
3474 timevar_push (TV_NAME_LOOKUP);
3475 if (is_ancestor (ns1, ns2))
3476 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, ns1);
3477 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP,
3478 namespace_ancestor (CP_DECL_CONTEXT (ns1), ns2));
3481 /* Insert USED into the using list of USER. Set INDIRECT_flag if this
3482 directive is not directly from the source. Also find the common
3483 ancestor and let our users know about the new namespace */
3485 add_using_namespace (tree user, tree used, bool indirect)
3488 timevar_push (TV_NAME_LOOKUP);
3489 /* Using oneself is a no-op. */
3492 timevar_pop (TV_NAME_LOOKUP);
3495 my_friendly_assert (TREE_CODE (user) == NAMESPACE_DECL, 380);
3496 my_friendly_assert (TREE_CODE (used) == NAMESPACE_DECL, 380);
3497 /* Check if we already have this. */
3498 t = purpose_member (used, DECL_NAMESPACE_USING (user));
3502 /* Promote to direct usage. */
3503 TREE_INDIRECT_USING (t) = 0;
3504 timevar_pop (TV_NAME_LOOKUP);
3508 /* Add used to the user's using list. */
3509 DECL_NAMESPACE_USING (user)
3510 = tree_cons (used, namespace_ancestor (user, used),
3511 DECL_NAMESPACE_USING (user));
3513 TREE_INDIRECT_USING (DECL_NAMESPACE_USING (user)) = indirect;
3515 /* Add user to the used's users list. */
3516 DECL_NAMESPACE_USERS (used)
3517 = tree_cons (user, 0, DECL_NAMESPACE_USERS (used));
3519 /* Recursively add all namespaces used. */
3520 for (t = DECL_NAMESPACE_USING (used); t; t = TREE_CHAIN (t))
3521 /* indirect usage */
3522 add_using_namespace (user, TREE_PURPOSE (t), 1);
3524 /* Tell everyone using us about the new used namespaces. */
3525 for (t = DECL_NAMESPACE_USERS (user); t; t = TREE_CHAIN (t))
3526 add_using_namespace (TREE_PURPOSE (t), used, 1);
3527 timevar_pop (TV_NAME_LOOKUP);
3530 /* Combines two sets of overloaded functions into an OVERLOAD chain, removing
3531 duplicates. The first list becomes the tail of the result.
3533 The algorithm is O(n^2). We could get this down to O(n log n) by
3534 doing a sort on the addresses of the functions, if that becomes
3538 merge_functions (tree s1, tree s2)
3540 for (; s2; s2 = OVL_NEXT (s2))
3542 tree fn2 = OVL_CURRENT (s2);
3545 for (fns1 = s1; fns1; fns1 = OVL_NEXT (fns1))
3547 tree fn1 = OVL_CURRENT (fns1);
3549 /* If the function from S2 is already in S1, there is no
3550 need to add it again. For `extern "C"' functions, we
3551 might have two FUNCTION_DECLs for the same function, in
3552 different namespaces; again, we only need one of them. */
3554 || (DECL_EXTERN_C_P (fn1) && DECL_EXTERN_C_P (fn2)
3555 && DECL_NAME (fn1) == DECL_NAME (fn2)))
3559 /* If we exhausted all of the functions in S1, FN2 is new. */
3561 s1 = build_overload (fn2, s1);
3566 /* This should return an error not all definitions define functions.
3567 It is not an error if we find two functions with exactly the
3568 same signature, only if these are selected in overload resolution.
3569 old is the current set of bindings, new the freshly-found binding.
3570 XXX Do we want to give *all* candidates in case of ambiguity?
3571 XXX In what way should I treat extern declarations?
3572 XXX I don't want to repeat the entire duplicate_decls here */
3574 static cxx_binding *
3575 ambiguous_decl (tree name, cxx_binding *old, cxx_binding *new, int flags)
3578 my_friendly_assert (old != NULL, 393);
3579 /* Copy the value. */
3580 val = BINDING_VALUE (new);
3582 switch (TREE_CODE (val))
3585 /* If we expect types or namespaces, and not templates,
3586 or this is not a template class. */
3587 if (LOOKUP_QUALIFIERS_ONLY (flags)
3588 && !DECL_CLASS_TEMPLATE_P (val))
3592 if (LOOKUP_NAMESPACES_ONLY (flags))
3595 case NAMESPACE_DECL:
3596 if (LOOKUP_TYPES_ONLY (flags))
3600 /* Ignore built-in functions that are still anticipated. */
3601 if (LOOKUP_QUALIFIERS_ONLY (flags) || DECL_ANTICIPATED (val))
3605 if (LOOKUP_QUALIFIERS_ONLY (flags))
3609 if (!BINDING_VALUE (old))
3610 BINDING_VALUE (old) = val;
3611 else if (val && val != BINDING_VALUE (old))
3613 if (is_overloaded_fn (BINDING_VALUE (old)) && is_overloaded_fn (val))
3614 BINDING_VALUE (old) = merge_functions (BINDING_VALUE (old), val);
3617 /* Some declarations are functions, some are not. */
3618 if (flags & LOOKUP_COMPLAIN)
3620 /* If we've already given this error for this lookup,
3621 BINDING_VALUE (old) is error_mark_node, so let's not
3622 repeat ourselves. */
3623 if (BINDING_VALUE (old) != error_mark_node)
3625 error ("use of `%D' is ambiguous", name);
3626 cp_error_at (" first declared as `%#D' here",
3627 BINDING_VALUE (old));
3629 cp_error_at (" also declared as `%#D' here", val);
3631 BINDING_VALUE (old) = error_mark_node;
3634 /* ... and copy the type. */
3635 type = BINDING_TYPE (new);
3636 if (LOOKUP_NAMESPACES_ONLY (flags))
3638 if (!BINDING_TYPE (old))
3639 BINDING_TYPE (old) = type;
3640 else if (type && BINDING_TYPE (old) != type)
3642 if (flags & LOOKUP_COMPLAIN)
3644 error ("`%D' denotes an ambiguous type",name);
3645 cp_error_at (" first type here", BINDING_TYPE (old));
3646 cp_error_at (" other type here", type);
3652 /* Subroutine of unualified_namespace_lookup:
3653 Add the bindings of NAME in used namespaces to VAL.
3654 We are currently looking for names in namespace SCOPE, so we
3655 look through USINGS for using-directives of namespaces
3656 which have SCOPE as a common ancestor with the current scope.
3657 Returns false on errors. */
3660 lookup_using_namespace (tree name, cxx_binding *val, tree usings, tree scope,
3661 int flags, tree *spacesp)
3664 timevar_push (TV_NAME_LOOKUP);
3665 /* Iterate over all used namespaces in current, searching for using
3666 directives of scope. */
3667 for (iter = usings; iter; iter = TREE_CHAIN (iter))
3668 if (TREE_VALUE (iter) == scope)
3670 tree used = ORIGINAL_NAMESPACE (TREE_PURPOSE (iter));
3672 cxx_scope_find_binding_for_name (NAMESPACE_LEVEL (used), name);
3674 *spacesp = tree_cons (used, NULL_TREE, *spacesp);
3675 /* Resolve ambiguities. */
3677 val = ambiguous_decl (name, val, val1, flags);
3679 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP,
3680 BINDING_VALUE (val) != error_mark_node);
3684 Accepts the NAME to lookup and its qualifying SCOPE.
3685 Returns the name/type pair found into the cxx_binding *RESULT,
3686 or false on error. */
3689 qualified_lookup_using_namespace (tree name, tree scope, cxx_binding *result,
3692 /* Maintain a list of namespaces visited... */
3693 tree seen = NULL_TREE;
3694 /* ... and a list of namespace yet to see. */
3695 tree todo = NULL_TREE;
3697 timevar_push (TV_NAME_LOOKUP);
3698 /* Look through namespace aliases. */
3699 scope = ORIGINAL_NAMESPACE (scope);
3700 while (scope && result->value != error_mark_node)
3702 cxx_binding *binding =
3703 cxx_scope_find_binding_for_name (NAMESPACE_LEVEL (scope), name);
3704 seen = tree_cons (scope, NULL_TREE, seen);
3706 result = ambiguous_decl (name, result, binding, flags);
3707 if (!BINDING_VALUE (result) && !BINDING_TYPE (result))
3708 /* Consider using directives. */
3709 for (usings = DECL_NAMESPACE_USING (scope); usings;
3710 usings = TREE_CHAIN (usings))
3711 /* If this was a real directive, and we have not seen it. */
3712 if (!TREE_INDIRECT_USING (usings)
3713 && !purpose_member (TREE_PURPOSE (usings), seen))
3714 todo = tree_cons (TREE_PURPOSE (usings), NULL_TREE, todo);
3717 scope = TREE_PURPOSE (todo);
3718 todo = TREE_CHAIN (todo);
3721 scope = NULL_TREE; /* If there never was a todo list. */
3723 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, result->value != error_mark_node);
3726 /* [namespace.memdef]/2 */
3728 /* Set the context of a declaration to scope. Complain if we are not
3732 set_decl_namespace (tree decl, tree scope, bool friendp)
3736 /* Get rid of namespace aliases. */
3737 scope = ORIGINAL_NAMESPACE (scope);
3739 /* It is ok for friends to be qualified in parallel space. */
3740 if (!friendp && !is_ancestor (current_namespace, scope))
3741 error ("declaration of `%D' not in a namespace surrounding `%D'",
3743 DECL_CONTEXT (decl) = FROB_CONTEXT (scope);
3744 if (scope != current_namespace)
3746 /* See whether this has been declared in the namespace. */
3747 old = namespace_binding (DECL_NAME (decl), scope);
3749 /* No old declaration at all. */
3751 /* A template can be explicitly specialized in any namespace. */
3752 if (processing_explicit_instantiation)
3754 if (!is_overloaded_fn (decl))
3755 /* Don't compare non-function decls with decls_match here,
3756 since it can't check for the correct constness at this
3757 point. pushdecl will find those errors later. */
3759 /* Since decl is a function, old should contain a function decl. */
3760 if (!is_overloaded_fn (old))
3762 if (processing_template_decl || processing_specialization)
3763 /* We have not yet called push_template_decl to turn a
3764 FUNCTION_DECL into a TEMPLATE_DECL, so the declarations
3765 won't match. But, we'll check later, when we construct the
3768 if (is_overloaded_fn (old))
3770 for (; old; old = OVL_NEXT (old))
3771 if (decls_match (decl, OVL_CURRENT (old)))
3775 if (decls_match (decl, old))
3781 error ("`%D' should have been declared inside `%D'",
3785 /* Compute the namespace where a declaration is defined. */
3788 decl_namespace (tree decl)
3790 timevar_push (TV_NAME_LOOKUP);
3792 decl = TYPE_STUB_DECL (decl);
3793 while (DECL_CONTEXT (decl))
3795 decl = DECL_CONTEXT (decl);
3796 if (TREE_CODE (decl) == NAMESPACE_DECL)
3797 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, decl);
3799 decl = TYPE_STUB_DECL (decl);
3800 my_friendly_assert (DECL_P (decl), 390);
3803 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, global_namespace);
3806 /* Return the namespace where the current declaration is declared. */
3809 current_decl_namespace (void)
3812 /* If we have been pushed into a different namespace, use it. */
3813 if (decl_namespace_list)
3814 return TREE_PURPOSE (decl_namespace_list);
3816 if (current_class_type)
3817 result = decl_namespace (TYPE_STUB_DECL (current_class_type));
3818 else if (current_function_decl)
3819 result = decl_namespace (current_function_decl);
3821 result = current_namespace;
3825 /* Temporarily set the namespace for the current declaration. */
3828 push_decl_namespace (tree decl)
3830 if (TREE_CODE (decl) != NAMESPACE_DECL)
3831 decl = decl_namespace (decl);
3832 decl_namespace_list = tree_cons (ORIGINAL_NAMESPACE (decl),
3833 NULL_TREE, decl_namespace_list);
3837 pop_decl_namespace (void)
3839 decl_namespace_list = TREE_CHAIN (decl_namespace_list);
3842 /* Enter a class or namespace scope. */
3847 if (TREE_CODE (t) == NAMESPACE_DECL)
3848 push_decl_namespace (t);
3849 else if CLASS_TYPE_P (t)
3850 push_nested_class (t);
3853 /* Leave scope pushed by push_scope. */
3858 if (TREE_CODE (t) == NAMESPACE_DECL)
3859 pop_decl_namespace ();
3860 else if CLASS_TYPE_P (t)
3861 pop_nested_class ();
3864 /* [basic.lookup.koenig] */
3865 /* A nonzero return value in the functions below indicates an error. */
3875 static bool arg_assoc (struct arg_lookup*, tree);
3876 static bool arg_assoc_args (struct arg_lookup*, tree);
3877 static bool arg_assoc_type (struct arg_lookup*, tree);
3878 static bool add_function (struct arg_lookup *, tree);
3879 static bool arg_assoc_namespace (struct arg_lookup *, tree);
3880 static bool arg_assoc_class (struct arg_lookup *, tree);
3881 static bool arg_assoc_template_arg (struct arg_lookup*, tree);
3883 /* Add a function to the lookup structure.
3884 Returns true on error. */
3887 add_function (struct arg_lookup *k, tree fn)
3889 /* We used to check here to see if the function was already in the list,
3890 but that's O(n^2), which is just too expensive for function lookup.
3891 Now we deal with the occasional duplicate in joust. In doing this, we
3892 assume that the number of duplicates will be small compared to the
3893 total number of functions being compared, which should usually be the
3896 /* We must find only functions, or exactly one non-function. */
3899 else if (is_overloaded_fn (k->functions) && is_overloaded_fn (fn))
3900 k->functions = build_overload (fn, k->functions);
3903 tree f1 = OVL_CURRENT (k->functions);
3905 if (is_overloaded_fn (f1))
3907 fn = f1; f1 = f2; f2 = fn;
3909 cp_error_at ("`%D' is not a function,", f1);
3910 cp_error_at (" conflict with `%D'", f2);
3911 error (" in call to `%D'", k->name);
3918 /* Add functions of a namespace to the lookup structure.
3919 Returns true on error. */
3922 arg_assoc_namespace (struct arg_lookup *k, tree scope)
3926 if (purpose_member (scope, k->namespaces))
3928 k->namespaces = tree_cons (scope, NULL_TREE, k->namespaces);
3930 value = namespace_binding (k->name, scope);
3934 for (; value; value = OVL_NEXT (value))
3935 if (add_function (k, OVL_CURRENT (value)))
3941 /* Adds everything associated with a template argument to the lookup
3942 structure. Returns true on error. */
3945 arg_assoc_template_arg (struct arg_lookup *k, tree arg)
3947 /* [basic.lookup.koenig]
3949 If T is a template-id, its associated namespaces and classes are
3950 ... the namespaces and classes associated with the types of the
3951 template arguments provided for template type parameters
3952 (excluding template template parameters); the namespaces in which
3953 any template template arguments are defined; and the classes in
3954 which any member templates used as template template arguments
3955 are defined. [Note: non-type template arguments do not
3956 contribute to the set of associated namespaces. ] */
3958 /* Consider first template template arguments. */
3959 if (TREE_CODE (arg) == TEMPLATE_TEMPLATE_PARM
3960 || TREE_CODE (arg) == UNBOUND_CLASS_TEMPLATE)
3962 else if (TREE_CODE (arg) == TEMPLATE_DECL)
3964 tree ctx = CP_DECL_CONTEXT (arg);
3966 /* It's not a member template. */
3967 if (TREE_CODE (ctx) == NAMESPACE_DECL)
3968 return arg_assoc_namespace (k, ctx);
3969 /* Otherwise, it must be member template. */
3971 return arg_assoc_class (k, ctx);
3973 /* It's not a template template argument, but it is a type template
3975 else if (TYPE_P (arg))
3976 return arg_assoc_type (k, arg);
3977 /* It's a non-type template argument. */
3982 /* Adds everything associated with class to the lookup structure.
3983 Returns true on error. */
3986 arg_assoc_class (struct arg_lookup *k, tree type)
3988 tree list, friends, context;
3991 /* Backend build structures, such as __builtin_va_list, aren't
3992 affected by all this. */
3993 if (!CLASS_TYPE_P (type))
3996 if (purpose_member (type, k->classes))
3998 k->classes = tree_cons (type, NULL_TREE, k->classes);
4000 context = decl_namespace (TYPE_MAIN_DECL (type));
4001 if (arg_assoc_namespace (k, context))
4004 /* Process baseclasses. */
4005 for (i = 0; i < CLASSTYPE_N_BASECLASSES (type); i++)
4006 if (arg_assoc_class (k, TYPE_BINFO_BASETYPE (type, i)))
4009 /* Process friends. */
4010 for (list = DECL_FRIENDLIST (TYPE_MAIN_DECL (type)); list;
4011 list = TREE_CHAIN (list))
4012 if (k->name == FRIEND_NAME (list))
4013 for (friends = FRIEND_DECLS (list); friends;
4014 friends = TREE_CHAIN (friends))
4015 /* Only interested in global functions with potentially hidden
4016 (i.e. unqualified) declarations. */
4017 if (CP_DECL_CONTEXT (TREE_VALUE (friends)) == context)
4018 if (add_function (k, TREE_VALUE (friends)))
4021 /* Process template arguments. */
4022 if (CLASSTYPE_TEMPLATE_INFO (type))
4024 list = INNERMOST_TEMPLATE_ARGS (CLASSTYPE_TI_ARGS (type));
4025 for (i = 0; i < TREE_VEC_LENGTH (list); ++i)
4026 arg_assoc_template_arg (k, TREE_VEC_ELT (list, i));
4032 /* Adds everything associated with a given type.
4033 Returns 1 on error. */
4036 arg_assoc_type (struct arg_lookup *k, tree type)
4038 switch (TREE_CODE (type))
4051 if (TYPE_PTRMEMFUNC_P (type))
4052 return arg_assoc_type (k, TYPE_PTRMEMFUNC_FN_TYPE (type));
4053 return arg_assoc_class (k, type);
4055 case REFERENCE_TYPE:
4057 return arg_assoc_type (k, TREE_TYPE (type));
4060 return arg_assoc_namespace (k, decl_namespace (TYPE_MAIN_DECL (type)));
4062 /* Pointer to member: associate class type and value type. */
4063 if (arg_assoc_type (k, TYPE_OFFSET_BASETYPE (type)))
4065 return arg_assoc_type (k, TREE_TYPE (type));
4067 /* The basetype is referenced in the first arg type, so just
4070 /* Associate the parameter types. */
4071 if (arg_assoc_args (k, TYPE_ARG_TYPES (type)))
4073 /* Associate the return type. */
4074 return arg_assoc_type (k, TREE_TYPE (type));
4075 case TEMPLATE_TYPE_PARM:
4076 case BOUND_TEMPLATE_TEMPLATE_PARM:
4081 if (type == unknown_type_node)
4083 /* else fall through */
4090 /* Adds everything associated with arguments. Returns true on error. */
4093 arg_assoc_args (struct arg_lookup *k, tree args)
4095 for (; args; args = TREE_CHAIN (args))
4096 if (arg_assoc (k, TREE_VALUE (args)))
4101 /* Adds everything associated with a given tree_node. Returns 1 on error. */
4104 arg_assoc (struct arg_lookup *k, tree n)
4106 if (n == error_mark_node)
4110 return arg_assoc_type (k, n);
4112 if (! type_unknown_p (n))
4113 return arg_assoc_type (k, TREE_TYPE (n));
4115 if (TREE_CODE (n) == ADDR_EXPR)
4116 n = TREE_OPERAND (n, 0);
4117 if (TREE_CODE (n) == COMPONENT_REF)
4118 n = TREE_OPERAND (n, 1);
4119 if (TREE_CODE (n) == OFFSET_REF)
4120 n = TREE_OPERAND (n, 1);
4121 while (TREE_CODE (n) == TREE_LIST)
4123 if (TREE_CODE (n) == BASELINK)
4124 n = BASELINK_FUNCTIONS (n);
4126 if (TREE_CODE (n) == FUNCTION_DECL)
4127 return arg_assoc_type (k, TREE_TYPE (n));
4128 if (TREE_CODE (n) == TEMPLATE_ID_EXPR)
4130 /* [basic.lookup.koenig]
4132 If T is a template-id, its associated namespaces and classes
4133 are the namespace in which the template is defined; for
4134 member templates, the member template's class... */
4135 tree template = TREE_OPERAND (n, 0);
4136 tree args = TREE_OPERAND (n, 1);
4140 if (TREE_CODE (template) == COMPONENT_REF)
4141 template = TREE_OPERAND (template, 1);
4143 /* First, the template. There may actually be more than one if
4144 this is an overloaded function template. But, in that case,
4145 we only need the first; all the functions will be in the same
4147 template = OVL_CURRENT (template);
4149 ctx = CP_DECL_CONTEXT (template);
4151 if (TREE_CODE (ctx) == NAMESPACE_DECL)
4153 if (arg_assoc_namespace (k, ctx) == 1)
4156 /* It must be a member template. */
4157 else if (arg_assoc_class (k, ctx) == 1)
4160 /* Now the arguments. */
4161 for (arg = args; arg != NULL_TREE; arg = TREE_CHAIN (arg))
4162 if (arg_assoc_template_arg (k, TREE_VALUE (arg)) == 1)
4167 my_friendly_assert (TREE_CODE (n) == OVERLOAD, 980715);
4169 for (; n; n = OVL_CHAIN (n))
4170 if (arg_assoc_type (k, TREE_TYPE (OVL_FUNCTION (n))))
4177 /* Performs Koenig lookup depending on arguments, where fns
4178 are the functions found in normal lookup. */
4181 lookup_arg_dependent (tree name, tree fns, tree args)
4183 struct arg_lookup k;
4184 tree fn = NULL_TREE;
4186 timevar_push (TV_NAME_LOOKUP);
4189 k.classes = NULL_TREE;
4191 /* Note that we've already looked at some namespaces during normal
4192 unqualified lookup, unless we found a decl in function scope. */
4194 fn = OVL_CURRENT (fns);
4195 if (fn && TREE_CODE (fn) == FUNCTION_DECL && DECL_LOCAL_FUNCTION_P (fn))
4196 k.namespaces = NULL_TREE;
4198 unqualified_namespace_lookup (name, 0, &k.namespaces);
4200 arg_assoc_args (&k, args);
4201 POP_TIMEVAR_AND_RETURN (TV_NAME_LOOKUP, k.functions);
4204 /* Process a namespace-alias declaration. */
4207 do_namespace_alias (tree alias, tree namespace)
4209 if (TREE_CODE (namespace) != NAMESPACE_DECL)
4211 /* The parser did not find it, so it's not there. */
4212 error ("unknown namespace `%D'", namespace);
4216 namespace = ORIGINAL_NAMESPACE (namespace);
4218 /* Build the alias. */
4219 alias = build_lang_decl (NAMESPACE_DECL, alias, void_type_node);
4220 DECL_NAMESPACE_ALIAS (alias) = namespace;
4221 DECL_EXTERNAL (alias) = 1;
4225 /* Check a non-member using-declaration. Return the name and scope
4226 being used, and the USING_DECL, or NULL_TREE on failure. */
4229 validate_nonmember_using_decl (tree decl, tree *scope, tree *name)
4231 *scope = global_namespace;
4234 if (TREE_CODE (decl) == TEMPLATE_ID_EXPR)
4236 *name = TREE_OPERAND (decl, 0);
4238 A using-declaration shall not name a template-id. */
4239 error ("a using-declaration cannot specify a template-id. Try `using %D'", *name);
4243 if (TREE_CODE (decl) == NAMESPACE_DECL)
4245 error ("namespace `%D' not allowed in using-declaration", decl);
4249 if (TREE_CODE (decl) == SCOPE_REF)
4251 /* It's a nested name with template parameter dependent scope.
4252 This can only be using-declaration for class member. */
4253 error ("`%T' is not a namespace", TREE_OPERAND (decl, 0));
4257 if (is_overloaded_fn (decl))
4258 decl = get_first_fn (decl);
4260 my_friendly_assert (DECL_P (decl), 20020908);
4262 if (TREE_CODE (decl) == CONST_DECL)
4263 /* Enumeration constants to not have DECL_CONTEXT set. */
4264 *scope = TYPE_CONTEXT (TREE_TYPE (decl));
4266 *scope = DECL_CONTEXT (decl);
4268 *scope = global_namespace;
4270 /* [namespace.udecl]
4271 A using-declaration for a class member shall be a
4272 member-declaration. */
4273 if (TYPE_P (*scope))
4275 error ("`%T' is not a namespace", *scope);
4278 *name = DECL_NAME (decl);
4279 /* Make a USING_DECL. */
4280 return push_using_decl (*scope, *name);
4283 /* Process local and global using-declarations. */
4286 do_nonmember_using_decl (tree scope, tree name, tree oldval, tree oldtype,
4287 tree *newval, tree *newtype)
4291 *newval = *newtype = NULL_TREE;
4292 cxx_binding_clear (&decls);
4293 if (!qualified_lookup_using_namespace (name, scope, &decls, 0))
4297 if (!decls.value && !decls.type)
4299 error ("`%D' not declared", name);
4303 /* Check for using functions. */
4304 if (decls.value && is_overloaded_fn (decls.value))
4308 if (oldval && !is_overloaded_fn (oldval))
4310 if (!DECL_IMPLICIT_TYPEDEF_P (oldval))
4311 error ("`%D' is already declared in this scope", name);
4316 for (tmp = decls.value; tmp; tmp = OVL_NEXT (tmp))
4318 tree new_fn = OVL_CURRENT (tmp);
4320 /* [namespace.udecl]
4322 If a function declaration in namespace scope or block
4323 scope has the same name and the same parameter types as a
4324 function introduced by a using declaration the program is
4326 for (tmp1 = oldval; tmp1; tmp1 = OVL_NEXT (tmp1))
4328 tree old_fn = OVL_CURRENT (tmp1);
4330 if (new_fn == old_fn)
4331 /* The function already exists in the current namespace. */
4333 else if (OVL_USED (tmp1))
4334 continue; /* this is a using decl */
4335 else if (compparms (TYPE_ARG_TYPES (TREE_TYPE (new_fn)),
4336 TYPE_ARG_TYPES (TREE_TYPE (old_fn))))
4338 /* There was already a non-using declaration in
4339 this scope with the same parameter types. If both
4340 are the same extern "C" functions, that's ok. */
4341 if (decls_match (new_fn, old_fn))
4343 /* If the OLD_FN was a builtin, there is now a
4344 real declaration. */
4345 if (DECL_ANTICIPATED (old_fn))
4346 DECL_ANTICIPATED (old_fn) = 0;
4349 else if (!DECL_ANTICIPATED (old_fn))
4351 /* If the OLD_FN was really declared, the
4352 declarations don't match. */
4353 error ("`%D' is already declared in this scope", name);
4357 /* If the OLD_FN was not really there, just ignore
4358 it and keep going. */
4362 /* If we broke out of the loop, there's no reason to add
4363 this function to the using declarations for this
4368 *newval = build_overload (OVL_CURRENT (tmp), *newval);
4369 if (TREE_CODE (*newval) != OVERLOAD)
4370 *newval = ovl_cons (*newval, NULL_TREE);
4371 OVL_USED (*newval) = 1;
4376 *newval = decls.value;
4377 if (oldval && !decls_match (*newval, oldval))
4378 error ("`%D' is already declared in this scope", name);
4381 *newtype = decls.type;
4382 if (oldtype && *newtype && !same_type_p (oldtype, *newtype))
4384 error ("using declaration `%D' introduced ambiguous type `%T'",
4390 /* Process a using-declaration not appearing in class or local scope. */
4393 do_toplevel_using_decl (tree decl)
4396 tree oldval, oldtype, newval, newtype;
4397 cxx_binding *binding;
4399 decl = validate_nonmember_using_decl (decl, &scope, &name);
4400 if (decl == NULL_TREE)
4403 binding = binding_for_name (NAMESPACE_LEVEL (current_namespace), name);
4405 oldval = BINDING_VALUE (binding);
4406 oldtype = BINDING_TYPE (binding);
4408 do_nonmember_using_decl (scope, name, oldval, oldtype, &newval, &newtype);
4410 /* Copy declarations found. */
4412 BINDING_VALUE (binding) = newval;
4414 BINDING_TYPE (binding) = newtype;
4418 /* Process a using-declaration at function scope. */
4421 do_local_using_decl (tree decl)
4424 tree oldval, oldtype, newval, newtype;
4426 decl = validate_nonmember_using_decl (decl, &scope, &name);
4427 if (decl == NULL_TREE)
4430 if (building_stmt_tree ()
4431 && at_function_scope_p ())
4432 add_decl_stmt (decl);
4434 oldval = lookup_name_current_level (name);
4435 oldtype = lookup_type_current_level (name);
4437 do_nonmember_using_decl (scope, name, oldval, oldtype, &newval, &newtype);
4441 if (is_overloaded_fn (newval))
4445 /* We only need to push declarations for those functions
4446 that were not already bound in the current level.
4447 The old value might be NULL_TREE, it might be a single
4448 function, or an OVERLOAD. */
4449 if (oldval && TREE_CODE (oldval) == OVERLOAD)
4450 term = OVL_FUNCTION (oldval);
4453 for (fn = newval; fn && OVL_CURRENT (fn) != term;
4455 push_overloaded_decl (OVL_CURRENT (fn),
4456 PUSH_LOCAL | PUSH_USING);
4459 push_local_binding (name, newval, PUSH_USING);
4462 set_identifier_type_value (name, newtype);
4466 do_class_using_decl (tree decl)
4470 if (TREE_CODE (decl) != SCOPE_REF
4471 || !TREE_OPERAND (decl, 0)
4472 || !TYPE_P (TREE_OPERAND (decl, 0)))
4474 error ("using-declaration for non-member at class scope");
4477 name = TREE_OPERAND (decl, 1);
4478 if (TREE_CODE (name) == BIT_NOT_EXPR)
4480 error ("using-declaration for destructor");
4483 else if (TREE_CODE (name) == TEMPLATE_ID_EXPR)
4485 name = TREE_OPERAND (name, 0);
4486 error ("a using-declaration cannot specify a template-id. Try `using %T::%D'", TREE_OPERAND (decl, 0), name);
4489 if (TREE_CODE (name) == TYPE_DECL)
4491 tree type = TREE_TYPE (name);
4492 if (CLASSTYPE_USE_TEMPLATE (TREE_TYPE (name)))
4494 name = DECL_NAME (CLASSTYPE_TI_TEMPLATE (type));
4495 error ("a using-declaration cannot specify a template-id.");
4498 name = DECL_NAME (name);
4500 else if (TREE_CODE (name) == TEMPLATE_DECL)
4501 name = DECL_NAME (name);
4502 else if (BASELINK_P (name))
4506 fns = BASELINK_FUNCTIONS (name);
4507 if (TREE_CODE (fns) == TEMPLATE_ID_EXPR)
4509 fns = TREE_OPERAND (fns, 0);
4510 error ("a using-declaration cannot specify a template-id. Try `using %T::%D'",
4511 BASELINK_ACCESS_BINFO (name),
4512 DECL_NAME (get_first_fn (fns)));
4514 name = DECL_NAME (get_first_fn (fns));
4517 my_friendly_assert (TREE_CODE (name) == IDENTIFIER_NODE, 980716);
4519 value = build_lang_decl (USING_DECL, name, void_type_node);
4520 DECL_INITIAL (value) = TREE_OPERAND (decl, 0);
4524 /* Process a using-directive. */
4527 do_using_directive (tree namespace)
4529 if (building_stmt_tree ())
4530 add_stmt (build_stmt (USING_STMT, namespace));
4532 /* using namespace A::B::C; */
4533 if (TREE_CODE (namespace) == SCOPE_REF)
4534 namespace = TREE_OPERAND (namespace, 1);
4535 if (TREE_CODE (namespace) == IDENTIFIER_NODE)
4537 /* Lookup in lexer did not find a namespace. */
4538 if (!processing_template_decl)
4539 error ("namespace `%T' undeclared", namespace);
4542 if (TREE_CODE (namespace) != NAMESPACE_DECL)
4544 if (!processing_template_decl)
4545 error ("`%T' is not a namespace", namespace);
4548 namespace = ORIGINAL_NAMESPACE (namespace);
4549 if (!toplevel_bindings_p ())
4550 push_using_directive (namespace);
4553 add_using_namespace (current_namespace, namespace, 0);
4557 check_default_args (tree x)
4559 tree arg = TYPE_ARG_TYPES (TREE_TYPE (x));
4560 bool saw_def = false;
4561 int i = 0 - (TREE_CODE (TREE_TYPE (x)) == METHOD_TYPE);
4562 for (; arg && arg != void_list_node; arg = TREE_CHAIN (arg), ++i)
4564 if (TREE_PURPOSE (arg))
4568 cp_error_at ("default argument missing for parameter %P of `%+#D'",
4576 mark_used (tree decl)
4578 TREE_USED (decl) = 1;
4579 if (processing_template_decl || skip_evaluation)
4582 if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl)
4583 && !TREE_ASM_WRITTEN (decl))
4584 /* Remember it, so we can check it was defined. */
4587 assemble_external (decl);
4589 /* Is it a synthesized method that needs to be synthesized? */
4590 if (TREE_CODE (decl) == FUNCTION_DECL
4591 && DECL_NONSTATIC_MEMBER_FUNCTION_P (decl)
4592 && DECL_ARTIFICIAL (decl)
4593 && !DECL_THUNK_P (decl)
4594 && ! DECL_INITIAL (decl)
4595 /* Kludge: don't synthesize for default args. */
4596 && current_function_decl)
4598 synthesize_method (decl);
4599 /* If we've already synthesized the method we don't need to
4600 instantiate it, so we can return right away. */
4604 /* If this is a function or variable that is an instance of some
4605 template, we now know that we will need to actually do the
4606 instantiation. We check that DECL is not an explicit
4607 instantiation because that is not checked in instantiate_decl. */
4608 if ((DECL_NON_THUNK_FUNCTION_P (decl) || TREE_CODE (decl) == VAR_DECL)
4609 && DECL_LANG_SPECIFIC (decl) && DECL_TEMPLATE_INFO (decl)
4610 && (!DECL_EXPLICIT_INSTANTIATION (decl)
4611 || (TREE_CODE (decl) == FUNCTION_DECL
4612 && DECL_INLINE (DECL_TEMPLATE_RESULT
4613 (template_for_substitution (decl))))))
4617 /* Normally, we put off instantiating functions in order to
4618 improve compile times. Maintaining a stack of active
4619 functions is expensive, and the inliner knows to
4620 instantiate any functions it might need.
4622 However, if instantiating this function might help us mark
4623 the current function TREE_NOTHROW, we go ahead and
4624 instantiate it now. */
4625 defer = (!flag_exceptions
4626 || TREE_CODE (decl) != FUNCTION_DECL
4627 /* If the called function can't throw, we don't need to
4628 generate its body to find that out. */
4629 || TREE_NOTHROW (decl)
4631 /* If we already know the current function can't throw,
4632 then we don't need to work hard to prove it. */
4633 || TREE_NOTHROW (current_function_decl)
4634 /* If we already know that the current function *can*
4635 throw, there's no point in gathering more
4637 || cp_function_chain->can_throw);
4639 instantiate_decl (decl, defer);
4643 /* Called when a class-head is encountered. TAG_KIND is the class-key
4644 for the class. SCOPE, if non-NULL, is the type or namespace
4645 indicated in the nested-name-specifier for the declaration of the
4646 class. ID is the name of the class, if any; it may be a TYPE_DECL,
4647 or an IDENTIFIER_NODE. ATTRIBUTES are attributes that apply to the
4650 Return a TYPE_DECL for the class being defined. */
4653 handle_class_head (enum tag_types tag_kind, tree scope, tree id,
4656 tree decl = NULL_TREE;
4657 tree current = current_scope ();
4658 bool xrefd_p = false;
4662 if (current == NULL_TREE)
4663 current = current_namespace;
4667 if (TREE_CODE (id) == TYPE_DECL)
4668 /* We must bash typedefs back to the main decl of the
4669 type. Otherwise we become confused about scopes. */
4670 decl = TYPE_MAIN_DECL (TREE_TYPE (id));
4671 else if (DECL_CLASS_TEMPLATE_P (id))
4672 decl = DECL_TEMPLATE_RESULT (id);
4677 /* According to the suggested resolution of core issue
4678 180, 'typename' is assumed after a class-key. */
4679 decl = make_typename_type (scope, id, tf_error);
4680 if (decl != error_mark_node)
4681 decl = TYPE_MAIN_DECL (decl);
4685 else if (scope == current)
4687 /* We've been given AGGR SCOPE::ID, when we're already
4688 inside SCOPE. Be nice about it. */
4690 pedwarn ("extra qualification `%T::' on member `%D' ignored",
4694 error ("`%T' does not have a class or union named `%D'",
4701 decl = xref_tag (tag_kind, id, attributes, false);
4702 if (decl == error_mark_node)
4703 return error_mark_node;
4704 decl = TYPE_MAIN_DECL (decl);
4708 if (!TYPE_BINFO (TREE_TYPE (decl)))
4710 error ("`%T' is not a class or union type", decl);
4711 return error_mark_node;
4714 /* For a definition, we want to enter the containing scope before
4715 looking up any base classes etc. Only do so, if this is different
4716 to the current scope. */
4717 context = CP_DECL_CONTEXT (decl);
4719 new_type_p = (current != context
4720 && TREE_CODE (context) != TEMPLATE_TYPE_PARM
4721 && TREE_CODE (context) != BOUND_TEMPLATE_TEMPLATE_PARM);
4723 push_scope (context);
4726 && PROCESSING_REAL_TEMPLATE_DECL_P ()
4727 && !CLASSTYPE_TEMPLATE_SPECIALIZATION (TREE_TYPE (decl)))
4728 decl = push_template_decl (decl);
4733 #include "gt-cp-decl2.h"