1 /* Perform the semantic phase of parsing, i.e., the process of
2 building tree structure, checking semantic consistency, and
3 building RTL. These routines are used both during actual parsing
4 and during the instantiation of template functions.
6 Copyright (C) 1998 Free Software Foundation, Inc.
7 Written by Mark Mitchell (mmitchell@usa.net) based on code found
8 formerly in parse.y and pt.c.
10 This file is part of GNU CC.
12 GNU CC is free software; you can redistribute it and/or modify it
13 under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 2, or (at your option)
17 GNU CC is distributed in the hope that it will be useful, but
18 WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 General Public License for more details.
22 You should have received a copy of the GNU General Public License
23 along with GNU CC; see the file COPYING. If not, write to the Free
24 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
35 /* There routines provide a modular interface to perform many parsing
36 operations. They may therefore be used during actual parsing, or
37 during template instantiation, which may be regarded as a
38 degenerate form of parsing. Since the current g++ parser is
39 lacking in several respects, and will be reimplemented, we are
40 attempting to move most code that is not directly related to
41 parsing into this file; that will make implementing the new parser
42 much easier since it will be able to make use of these routines. */
44 /* When parsing a template, LAST_TREE contains the last statement
45 parsed. These are chained together through the TREE_CHAIN field,
46 but often need to be re-organized since the parse is performed
47 bottom-up. This macro makes LAST_TREE the indicated SUBSTMT of
50 #define RECHAIN_STMTS(stmt, substmt, last) \
53 TREE_CHAIN (stmt) = NULL_TREE; \
57 #define RECHAIN_STMTS_FROM_LAST(stmt, substmt) \
58 RECHAIN_STMTS (stmt, substmt, last_tree)
60 #define RECHAIN_STMTS_FROM_CHAIN(stmt, substmt) \
61 RECHAIN_STMTS (stmt, substmt, TREE_CHAIN (stmt))
63 /* Finish an expression-statement, whose EXPRESSION is as indicated. */
66 finish_expr_stmt (expr)
69 if (expr != NULL_TREE)
71 if (!processing_template_decl)
73 emit_line_note (input_filename, lineno);
74 /* Do default conversion if safe and possibly important,
75 in case within ({...}). */
76 if ((TREE_CODE (TREE_TYPE (expr)) == ARRAY_TYPE
78 || TREE_CODE (TREE_TYPE (expr)) == FUNCTION_TYPE)
79 expr = default_conversion (expr);
82 cplus_expand_expr_stmt (expr);
89 /* Begin an if-statement. Returns a newly created IF_STMT if
97 if (processing_template_decl)
99 r = build_min_nt (IF_STMT, NULL_TREE, NULL_TREE, NULL_TREE);
110 /* Process the COND of an if-statement, which may be given by
114 finish_if_stmt_cond (cond, if_stmt)
118 if (processing_template_decl)
120 if (last_tree != if_stmt)
121 RECHAIN_STMTS_FROM_LAST (if_stmt, IF_COND (if_stmt));
123 IF_COND (if_stmt) = cond;
127 emit_line_note (input_filename, lineno);
128 expand_start_cond (condition_conversion (cond), 0);
132 /* Finish the then-clause of an if-statement, which may be given by
136 finish_then_clause (if_stmt)
139 if (processing_template_decl)
141 RECHAIN_STMTS_FROM_CHAIN (if_stmt,
142 THEN_CLAUSE (if_stmt));
150 /* Begin the else-clause of an if-statement. */
155 if (!processing_template_decl)
156 expand_start_else ();
159 /* Finish the else-clause of an if-statement, which may be given by
163 finish_else_clause (if_stmt)
166 if (processing_template_decl)
167 RECHAIN_STMTS_FROM_CHAIN (if_stmt, ELSE_CLAUSE (if_stmt));
170 /* Finsh an if-statement. */
175 if (!processing_template_decl)
182 /* Begin a while-statement. Returns a newly created WHILE_STMT if
190 if (processing_template_decl)
192 r = build_min_nt (WHILE_STMT, NULL_TREE, NULL_TREE);
198 emit_line_note (input_filename, lineno);
199 expand_start_loop (1);
208 /* Process the COND of an if-statement, which may be given by
212 finish_while_stmt_cond (cond, while_stmt)
216 if (processing_template_decl)
218 if (last_tree != while_stmt)
219 RECHAIN_STMTS_FROM_LAST (while_stmt,
220 WHILE_COND (while_stmt));
222 TREE_OPERAND (while_stmt, 0) = cond;
226 emit_line_note (input_filename, lineno);
227 expand_exit_loop_if_false (0, condition_conversion (cond));
230 /* If COND wasn't a declaration, clear out the
231 block we made for it and start a new one here so the
232 optimization in expand_end_loop will work. */
233 if (getdecls () == NULL_TREE)
240 /* Finish a while-statement, which may be given by WHILE_STMT. */
243 finish_while_stmt (while_stmt)
248 if (processing_template_decl)
249 RECHAIN_STMTS_FROM_CHAIN (while_stmt, WHILE_BODY (while_stmt));
255 /* Begin a do-statement. Returns a newly created DO_STMT if
261 if (processing_template_decl)
263 tree r = build_min_nt (DO_STMT, NULL_TREE, NULL_TREE);
270 emit_line_note (input_filename, lineno);
271 expand_start_loop_continue_elsewhere (1);
276 /* Finish the body of a do-statement, which may be given by DO_STMT. */
279 finish_do_body (do_stmt)
282 if (processing_template_decl)
283 RECHAIN_STMTS_FROM_CHAIN (do_stmt, DO_BODY (do_stmt));
285 expand_loop_continue_here ();
288 /* Finish a do-statement, which may be given by DO_STMT, and whose
289 COND is as indicated. */
292 finish_do_stmt (cond, do_stmt)
296 if (processing_template_decl)
297 DO_COND (do_stmt) = cond;
300 emit_line_note (input_filename, lineno);
301 expand_exit_loop_if_false (0, condition_conversion (cond));
309 /* Finish a return-statement. The EXPRESSION returned, if any, is as
313 finish_return_stmt (expr)
316 emit_line_note (input_filename, lineno);
317 c_expand_return (expr);
321 /* Begin a for-statement. Returns a new FOR_STMT if appropriate. */
328 if (processing_template_decl)
330 r = build_min_nt (FOR_STMT, NULL_TREE, NULL_TREE,
331 NULL_TREE, NULL_TREE);
337 if (flag_new_for_scope > 0)
340 note_level_for_for ();
346 /* Finish the for-init-statement of a for-statement, which may be
347 given by FOR_STMT. */
350 finish_for_init_stmt (for_stmt)
353 if (processing_template_decl)
355 if (last_tree != for_stmt)
356 RECHAIN_STMTS_FROM_CHAIN (for_stmt, FOR_INIT_STMT (for_stmt));
361 emit_line_note (input_filename, lineno);
362 expand_start_loop_continue_elsewhere (1);
368 /* Finish the COND of a for-statement, which may be given by
372 finish_for_cond (cond, for_stmt)
376 if (processing_template_decl)
378 if (last_tree != for_stmt)
379 RECHAIN_STMTS_FROM_LAST (for_stmt, FOR_COND (for_stmt));
381 FOR_COND (for_stmt) = cond;
385 emit_line_note (input_filename, lineno);
387 expand_exit_loop_if_false (0, condition_conversion (cond));
390 /* If the cond wasn't a declaration, clear out the
391 block we made for it and start a new one here so the
392 optimization in expand_end_loop will work. */
393 if (getdecls () == NULL_TREE)
400 /* Finish the increment-EXPRESSION in a for-statement, which may be
401 given by FOR_STMT. */
404 finish_for_expr (expr, for_stmt)
408 if (processing_template_decl)
409 FOR_EXPR (for_stmt) = expr;
411 /* Don't let the tree nodes for EXPR be discarded
412 by clear_momentary during the parsing of the next stmt. */
416 /* Finish the body of a for-statement, which may be given by
417 FOR_STMT. The increment-EXPR for the loop must be
421 finish_for_stmt (expr, for_stmt)
425 /* Pop the scope for the body of the loop. */
428 if (processing_template_decl)
429 RECHAIN_STMTS_FROM_CHAIN (for_stmt, FOR_BODY (for_stmt));
432 emit_line_note (input_filename, lineno);
433 expand_loop_continue_here ();
435 cplus_expand_expr_stmt (expr);
441 if (flag_new_for_scope > 0)
447 /* Finish a break-statement. */
452 emit_line_note (input_filename, lineno);
453 if (processing_template_decl)
454 add_tree (build_min_nt (BREAK_STMT));
455 else if ( ! expand_exit_something ())
456 cp_error ("break statement not within loop or switch");
459 /* Finish a continue-statement. */
462 finish_continue_stmt ()
464 emit_line_note (input_filename, lineno);
465 if (processing_template_decl)
466 add_tree (build_min_nt (CONTINUE_STMT));
467 else if (! expand_continue_loop (0))
468 cp_error ("continue statement not within a loop");
471 /* Begin a switch-statement. */
479 /* Finish the cond of a switch-statement. Returns a new
480 SWITCH_STMT if appropriate. */
483 finish_switch_cond (cond)
488 if (processing_template_decl)
490 r = build_min_nt (SWITCH_STMT, cond, NULL_TREE);
495 emit_line_note (input_filename, lineno);
496 c_expand_start_case (cond);
501 /* Don't let the tree nodes for COND be discarded by
502 clear_momentary during the parsing of the next stmt. */
508 /* Finish the body of a switch-statement, which may be given by
509 SWITCH_STMT. The COND to switch on is indicated. */
512 finish_switch_stmt (cond, switch_stmt)
516 if (processing_template_decl)
517 RECHAIN_STMTS_FROM_CHAIN (switch_stmt, SWITCH_BODY (switch_stmt));
519 expand_end_case (cond);
526 /* Finish a case-label. */
529 finish_case_label (low_value, high_value)
533 do_case (low_value, high_value);
537 /* Finish a goto-statement. */
540 finish_goto_stmt (destination)
543 if (processing_template_decl)
544 add_tree (build_min_nt (GOTO_STMT, destination));
547 emit_line_note (input_filename, lineno);
549 if (TREE_CODE (destination) == IDENTIFIER_NODE)
551 tree decl = lookup_label (destination);
552 TREE_USED (decl) = 1;
556 expand_computed_goto (destination);
560 /* Begin a try-block. Returns a newly-created TRY_BLOCK if
566 if (processing_template_decl)
568 tree r = build_min_nt (TRY_BLOCK, NULL_TREE,
575 emit_line_note (input_filename, lineno);
576 expand_start_try_stmts ();
581 /* Finish a try-block, which may be given by TRY_BLOCK. */
584 finish_try_block (try_block)
587 if (processing_template_decl)
588 RECHAIN_STMTS_FROM_LAST (try_block, TRY_STMTS (try_block));
591 expand_start_all_catch ();
595 /* Finish a handler-sequence for a try-block, which may be given by
599 finish_handler_sequence (try_block)
602 if (processing_template_decl)
603 RECHAIN_STMTS_FROM_CHAIN (try_block, TRY_HANDLERS (try_block));
606 expand_end_all_catch ();
610 /* Begin a handler. Returns a HANDLER if appropriate. */
617 if (processing_template_decl)
619 r = build_min_nt (HANDLER, NULL_TREE, NULL_TREE);
630 /* Finish the handler-parameters for a handler, which may be given by
634 finish_handler_parms (handler)
637 if (processing_template_decl)
638 RECHAIN_STMTS_FROM_CHAIN (handler, HANDLER_PARMS (handler));
641 /* Finish a handler, which may be given by HANDLER. */
644 finish_handler (handler)
647 if (processing_template_decl)
648 RECHAIN_STMTS_FROM_CHAIN (handler, HANDLER_BODY (handler));
650 expand_end_catch_block ();
655 /* Begin a compound-statement. If HAS_NO_SCOPE is non-zero, the
656 compound-statement does not define a scope. Returns a new
657 COMPOUND_STMT if appropriate. */
660 begin_compound_stmt (has_no_scope)
665 if (processing_template_decl)
667 r = build_min_nt (COMPOUND_STMT, NULL_TREE);
670 COMPOUND_STMT_NO_SCOPE (r) = 1;
682 /* Finish a compound-statement, which may be given by COMPOUND_STMT.
683 If HAS_NO_SCOPE is non-zero, the compound statement does not define
687 finish_compound_stmt (has_no_scope, compound_stmt)
698 if (processing_template_decl)
699 RECHAIN_STMTS_FROM_CHAIN (compound_stmt,
700 COMPOUND_BODY (compound_stmt));
707 /* Finish an asm-statement, whose components are a CV_QUALIFIER, a
708 STRING, some OUTPUT_OPERANDS, some INPUT_OPERANDS, and some
712 finish_asm_stmt (cv_qualifier, string, output_operands,
713 input_operands, clobbers)
716 tree output_operands;
720 if (TREE_CHAIN (string))
721 string = combine_strings (string);
723 if (processing_template_decl)
725 tree r = build_min_nt (ASM_STMT, cv_qualifier, string,
726 output_operands, input_operands,
732 emit_line_note (input_filename, lineno);
733 if (output_operands != NULL_TREE || input_operands != NULL_TREE
734 || clobbers != NULL_TREE)
736 if (cv_qualifier != NULL_TREE
737 && cv_qualifier != ridpointers[(int) RID_VOLATILE])
738 cp_warning ("%s qualifier ignored on asm",
739 IDENTIFIER_POINTER (cv_qualifier));
741 c_expand_asm_operands (string, output_operands,
745 == ridpointers[(int) RID_VOLATILE],
746 input_filename, lineno);
750 if (cv_qualifier != NULL_TREE)
751 cp_warning ("%s qualifier ignored on asm",
752 IDENTIFIER_POINTER (cv_qualifier));
760 /* Finish a parenthesized expression EXPR. */
763 finish_parenthesized_expr (expr)
766 if (IS_EXPR_CODE_CLASS (TREE_CODE_CLASS (TREE_CODE (expr))))
767 /* This inhibits warnings in truthvalue_conversion. */
768 C_SET_EXP_ORIGINAL_CODE (expr, ERROR_MARK);
773 /* Begin a statement-expression. The value returned must be passed to
780 /* If we're processing_template_decl, then the upcoming compound
781 statement will be chained onto the tree structure, starting at
782 last_tree. We return last_tree so that we can later unhook the
783 compound statement. */
784 return processing_template_decl ? last_tree : expand_start_stmt_expr();
787 /* Finish a statement-expression. RTL_EXPR should be the value
788 returned by the previous begin_stmt_expr; EXPR is the
789 statement-expression. Returns an expression representing the
790 statement-expression. */
793 finish_stmt_expr (rtl_expr, expr)
799 if (!processing_template_decl)
801 rtl_expr = expand_end_stmt_expr (rtl_expr);
802 /* The statements have side effects, so the group does. */
803 TREE_SIDE_EFFECTS (rtl_expr) = 1;
806 if (TREE_CODE (expr) == BLOCK)
808 /* Make a BIND_EXPR for the BLOCK already made. */
809 if (processing_template_decl)
810 result = build (BIND_EXPR, NULL_TREE,
811 NULL_TREE, last_tree, expr);
813 result = build (BIND_EXPR, TREE_TYPE (rtl_expr),
814 NULL_TREE, rtl_expr, expr);
816 /* Remove the block from the tree at this point.
817 It gets put back at the proper place
818 when the BIND_EXPR is expanded. */
824 if (processing_template_decl)
826 /* Remove the compound statement from the tree structure; it is
827 now saved in the BIND_EXPR. */
828 last_tree = rtl_expr;
829 TREE_CHAIN (last_tree) = NULL_TREE;
835 /* Finish a call to FN with ARGS. Returns a representation of the
839 finish_call_expr (fn, args, koenig)
848 if (TREE_CODE (fn) == BIT_NOT_EXPR)
849 fn = build_x_unary_op (BIT_NOT_EXPR, TREE_OPERAND (fn, 0));
850 else if (TREE_CODE (fn) != TEMPLATE_ID_EXPR)
851 fn = do_identifier (fn, 2, args);
853 result = build_x_function_call (fn, args, current_class_ref);
855 if (TREE_CODE (result) == CALL_EXPR
856 && TREE_TYPE (result) != void_type_node)
857 result = require_complete_type (result);
862 /* Finish a call to a postfix increment or decrement or EXPR. (Which
863 is indicated by CODE, which should be POSTINCREMENT_EXPR or
864 POSTDECREMENT_EXPR.) */
867 finish_increment_expr (expr, code)
871 /* If we get an OFFSET_REF, turn it into what it really means (e.g.,
872 a COMPONENT_REF). This way if we've got, say, a reference to a
873 static member that's being operated on, we don't end up trying to
874 find a member operator for the class it's in. */
876 if (TREE_CODE (expr) == OFFSET_REF)
877 expr = resolve_offset_ref (expr);
878 return build_x_unary_op (code, expr);
881 /* Finish a use of `this'. Returns an expression for `this'. */
888 if (current_class_ptr)
890 #ifdef WARNING_ABOUT_CCD
891 TREE_USED (current_class_ptr) = 1;
893 result = current_class_ptr;
895 else if (current_function_decl
896 && DECL_STATIC_FUNCTION_P (current_function_decl))
898 error ("`this' is unavailable for static member functions");
899 result = error_mark_node;
903 if (current_function_decl)
904 error ("invalid use of `this' in non-member function");
906 error ("invalid use of `this' at top level");
907 result = error_mark_node;
913 /* Finish a member function call using OBJECT and ARGS as arguments to
914 FN. Returns an expression for the call. */
917 finish_object_call_expr (fn, object, args)
923 /* This is a future direction of this code, but because
924 build_x_function_call cannot always undo what is done in
925 build_component_ref entirely yet, we cannot do this. */
927 tree real_fn = build_component_ref (object, fn, NULL_TREE, 1);
928 return finish_call_expr (real_fn, args);
930 if (TREE_CODE (fn) == TYPE_DECL)
932 if (processing_template_decl)
933 /* This can happen on code like:
936 template <class T> void f(T t) {
940 We just grab the underlying IDENTIFIER. */
944 cp_error ("calling type `%T' like a method", fn);
945 return error_mark_node;
949 return build_method_call (object, fn, args, NULL_TREE, LOOKUP_NORMAL);
953 /* Finish a qualified member function call using OBJECT and ARGS as
954 arguments to FN. Returns an expressino for the call. */
957 finish_qualified_object_call_expr (fn, object, args)
962 if (IS_SIGNATURE (TREE_OPERAND (fn, 0)))
964 warning ("signature name in scope resolution ignored");
965 return finish_object_call_expr (TREE_OPERAND (fn, 1), object, args);
968 return build_scoped_method_call (object, TREE_OPERAND (fn, 0),
969 TREE_OPERAND (fn, 1), args);
972 /* Finish a pseudo-destructor call expression of OBJECT, with SCOPE
973 being the scope, if any, of DESTRUCTOR. Returns an expression for
977 finish_pseudo_destructor_call_expr (object, scope, destructor)
982 if (scope && scope != destructor)
983 cp_error ("destructor specifier `%T::~%T()' must have matching names",
986 if ((scope == NULL_TREE || IDENTIFIER_GLOBAL_VALUE (destructor))
987 && (TREE_CODE (TREE_TYPE (object)) !=
988 TREE_CODE (TREE_TYPE (IDENTIFIER_GLOBAL_VALUE (destructor)))))
989 cp_error ("`%E' is not of type `%T'", object, destructor);
991 return cp_convert (void_type_node, object);
994 /* Finish a call to a globally qualified member function FN using
995 ARGS. Returns an expression for the call. */
998 finish_globally_qualified_member_call_expr (fn, args)
1002 if (processing_template_decl)
1003 return build_min_nt (CALL_EXPR, copy_to_permanent (fn), args,
1006 return build_member_call (TREE_OPERAND (fn, 0),
1007 TREE_OPERAND (fn, 1),
1011 /* Finish an expression taking the address of LABEL. Returns an
1012 expression for the address. */
1015 finish_label_address_expr (label)
1020 label = lookup_label (label);
1021 if (label == NULL_TREE)
1022 result = null_pointer_node;
1025 TREE_USED (label) = 1;
1026 result = build1 (ADDR_EXPR, ptr_type_node, label);
1027 TREE_CONSTANT (result) = 1;
1033 /* Finish an expression of the form CODE EXPR. */
1036 finish_unary_op_expr (code, expr)
1037 enum tree_code code;
1040 tree result = build_x_unary_op (code, expr);
1041 if (code == NEGATE_EXPR && TREE_CODE (expr) == INTEGER_CST)
1042 TREE_NEGATED_INT (result) = 1;
1043 overflow_warning (result);
1047 /* Finish an id-expression. */
1050 finish_id_expr (expr)
1053 if (TREE_CODE (expr) == IDENTIFIER_NODE)
1054 expr = do_identifier (expr, 1, NULL_TREE);
1059 /* Begin a new-placement. */
1062 begin_new_placement ()
1064 /* The arguments to a placement new might be passed to a
1065 deallocation function, in the event that the allocation throws an
1066 exception. Since we don't expand exception handlers until the
1067 end of a function, we must make sure the arguments stay around
1069 return suspend_momentary ();
1072 /* Finish a new-placement. The ARGS are the placement arguments. The
1073 COOKIE is the value returned by the previous call to
1074 begin_new_placement. */
1077 finish_new_placement (args, cookie)
1081 resume_momentary (cookie);
1085 /* Begin a function defniition declared with DECL_SPECS and
1086 DECLARATOR. Returns non-zero if the function-declaration is
1090 begin_function_definition (decl_specs, declarator)
1096 split_specs_attrs (decl_specs, &specs, &attrs);
1097 if (!start_function (specs, declarator, attrs, 0))
1100 reinit_parse_for_function ();
1101 /* The things we're about to see are not directly qualified by any
1102 template headers we've seen thus far. */
1103 reset_specialization ();
1108 /* Begin a constructor declarator of the form `SCOPE::NAME'. Returns
1112 begin_constructor_declarator (scope, name)
1116 tree result = build_parse_node (SCOPE_REF, scope, name);
1118 if (scope != current_class_type)
1120 push_nested_class (scope, 3);
1121 TREE_COMPLEXITY (result) = current_class_depth;
1127 /* Finish an init-declarator. Returns a DECL. */
1130 finish_declarator (declarator, declspecs, attributes,
1131 prefix_attributes, initialized)
1135 tree prefix_attributes;
1138 return start_decl (declarator, declspecs, initialized, attributes,
1142 /* Finish a translation unit. */
1145 finish_translation_unit ()
1147 /* In case there were missing closebraces,
1148 get us back to the global binding level. */
1149 while (! toplevel_bindings_p ())
1151 while (current_namespace != global_namespace)
1156 /* Finish a template type parameter, specified as AGGR IDENTIFIER.
1157 Returns the parameter. */
1160 finish_template_type_parm (aggr, identifier)
1164 if (aggr == signature_type_node)
1165 sorry ("signature as template type parameter");
1166 else if (aggr != class_type_node)
1168 pedwarn ("template type parameters must use the keyword `class' or `typename'");
1169 aggr = class_type_node;
1172 return build_tree_list (aggr, identifier);
1175 /* Finish a template template parameter, specified as AGGR IDENTIFIER.
1176 Returns the parameter. */
1179 finish_template_template_parm (aggr, identifier)
1183 tree decl = build_decl (TYPE_DECL, identifier, NULL_TREE);
1184 tree tmpl = build_lang_decl (TEMPLATE_DECL, identifier, NULL_TREE);
1185 DECL_TEMPLATE_PARMS (tmpl) = current_template_parms;
1186 DECL_TEMPLATE_RESULT (tmpl) = decl;
1187 SET_DECL_ARTIFICIAL (decl);
1188 end_template_decl ();
1190 return finish_template_type_parm (aggr, tmpl);
1193 /* Finish a parameter list, indicated by PARMS. If ELLIPSIS is
1194 non-zero, the parameter list was terminated by a `...'. */
1197 finish_parmlist (parms, ellipsis)
1202 chainon (parms, void_list_node);
1203 /* We mark the PARMS as a parmlist so that declarator processing can
1204 disambiguate certain constructs. */
1205 if (parms != NULL_TREE)
1206 TREE_PARMLIST (parms) = 1;
1211 /* Begin a class definition, as indicated by T. */
1214 begin_class_definition (t)
1219 push_obstacks_nochange ();
1220 end_temporary_allocation ();
1222 if (t == error_mark_node
1223 || ! IS_AGGR_TYPE (t))
1225 t = new_type = make_lang_type (RECORD_TYPE);
1226 pushtag (make_anon_name (), t, 0);
1229 duplicate_tag_error (t);
1230 if (TYPE_SIZE (t) || TYPE_BEING_DEFINED (t))
1232 t = make_lang_type (TREE_CODE (t));
1233 pushtag (TYPE_IDENTIFIER (t), t, 0);
1236 if (processing_template_decl && TYPE_CONTEXT (t)
1237 && TREE_CODE (TYPE_CONTEXT (t)) != NAMESPACE_DECL
1238 && ! current_class_type)
1239 push_template_decl (TYPE_STUB_DECL (t));
1241 TYPE_BEING_DEFINED (t) = 1;
1242 maybe_process_partial_specialization (t);
1243 /* Reset the interface data, at the earliest possible
1244 moment, as it might have been set via a class foo;
1246 /* Don't change signatures. */
1247 if (! IS_SIGNATURE (t))
1250 tree name = TYPE_IDENTIFIER (t);
1252 if (! ANON_AGGRNAME_P (name))
1254 CLASSTYPE_INTERFACE_ONLY (t) = interface_only;
1255 SET_CLASSTYPE_INTERFACE_UNKNOWN_X
1256 (t, interface_unknown);
1259 /* Record how to set the access of this class's
1260 virtual functions. If write_virtuals == 3, then
1261 inline virtuals are ``extern inline''. */
1262 if (write_virtuals == 3)
1263 needs_writing = ! CLASSTYPE_INTERFACE_ONLY (t)
1264 && CLASSTYPE_INTERFACE_KNOWN (t);
1267 CLASSTYPE_VTABLE_NEEDS_WRITING (t) = needs_writing;
1270 t = TYPE_IDENTIFIER ($<ttype>0);
1271 if (t && IDENTIFIER_TEMPLATE (t))
1272 overload_template_name (t, 1);
1274 reset_specialization();
1276 /* In case this is a local class within a template
1277 function, we save the current tree structure so
1278 that we can get it back later. */
1284 /* Finish a class definition T, with the indicated COMPONENTS, and
1285 with the indicate ATTRIBUTES. If SEMI, the definition is
1286 immediately followed by a semicolon. Returns the type. */
1289 finish_class_definition (t, components, attributes, semi)
1296 /* Need to rework class nesting in the presence of nested classes,
1298 shadow_tag (CLASSTYPE_AS_LIST (t)); */
1301 /* finish_struct nukes this anyway; if finish_exception does too,
1304 note_got_semicolon (t);
1306 /* If we got any attributes in class_head, xref_tag will stick them in
1307 TREE_TYPE of the type. Grab them now. */
1308 attributes = chainon (TREE_TYPE (t), attributes);
1309 TREE_TYPE (t) = NULL_TREE;
1311 if (TREE_CODE (t) == ENUMERAL_TYPE)
1315 t = finish_struct (t, components, attributes, semi);
1317 note_got_semicolon (t);
1323 check_for_missing_semicolon (t);
1324 if (current_scope () == current_function_decl)
1325 do_pending_defargs ();
1330 /* Finish processing the default argument expressions cached during
1331 the processing of a class definition. */
1334 finish_default_args ()
1337 && current_scope () == current_function_decl)
1338 do_pending_inlines ();
1341 /* Finish processing the inline function definitions cached during the
1342 processing of a class definition. */
1345 begin_inline_definitions ()
1347 if (current_class_type == NULL_TREE)
1348 clear_inline_text_obstack ();
1350 /* Undo the begin_tree in begin_class_definition. */
1354 /* Finish processing the declaration of a member class template
1355 TYPES whose template parameters are given by PARMS. */
1358 finish_member_class_template (parms, types)
1364 /* If there are declared, but undefined, partial specializations
1365 mixed in with the typespecs they will not yet have passed through
1366 maybe_process_partial_specialization, so we do that here. */
1367 for (t = types; t != NULL_TREE; t = TREE_CHAIN (t))
1368 if (IS_AGGR_TYPE_CODE (TREE_CODE (TREE_VALUE (t))))
1369 maybe_process_partial_specialization (TREE_VALUE (t));
1371 note_list_got_semicolon (types);
1372 grok_x_components (types, NULL_TREE);
1373 if (TYPE_CONTEXT (TREE_VALUE (types)) != current_class_type)
1374 /* The component was in fact a friend declaration. We avoid
1375 finish_member_template_decl performing certain checks by
1378 finish_member_template_decl (parms, types);
1379 /* As with other component type declarations, we do
1380 not store the new DECL on the list of
1385 /* Finish processsing a complete template declaration. The PARMS are
1386 the template parameters. */
1389 finish_template_decl (parms)
1393 end_template_decl ();
1395 end_specialization ();
1398 /* Finish processing a a template-id (which names a type) of the form
1399 NAME < ARGS >. Return the TYPE_DECL for the type named by the
1400 template-id. If ENTERING_SCOPE is non-zero we are about to enter
1401 the scope of template-id indicated. */
1404 finish_template_type (name, args, entering_scope)
1411 decl = lookup_template_class (name, args,
1412 NULL_TREE, NULL_TREE, entering_scope);
1413 if (decl != error_mark_node)
1414 decl = TYPE_STUB_DECL (decl);
1419 /* SR is a SCOPE_REF node. Enter the scope of SR, whether it is a
1420 namespace scope or a class scope. */
1426 tree scope = TREE_OPERAND (sr, 0);
1428 if (TREE_CODE (scope) == NAMESPACE_DECL)
1430 push_decl_namespace (scope);
1431 TREE_COMPLEXITY (sr) = -1;
1433 else if (scope != current_class_type)
1435 push_nested_class (scope, 3);
1436 TREE_COMPLEXITY (sr) = current_class_depth;
1440 /* Finish processing a BASE_CLASS with the indicated ACCESS_SPECIFIER.
1441 Return a TREE_LIST containing the ACCESS_SPECIFIER and the
1442 BASE_CLASS, or NULL_TREE if an error occurred. The
1443 ACCESSS_SPECIFIER is one of
1444 access_{default,public,protected_private}[_virtual]_node.*/
1447 finish_base_specifier (access_specifier, base_class,
1448 current_aggr_is_signature)
1449 tree access_specifier;
1451 int current_aggr_is_signature;
1456 if (base_class == NULL_TREE)
1458 error ("invalid base class");
1459 type = error_mark_node;
1462 type = TREE_TYPE (base_class);
1463 if (current_aggr_is_signature && access_specifier)
1464 error ("access and source specifiers not allowed in signature");
1465 if (! is_aggr_type (type, 1))
1467 else if (current_aggr_is_signature
1468 && (! type) && (! IS_SIGNATURE (type)))
1470 error ("class name not allowed as base signature");
1473 else if (current_aggr_is_signature)
1475 sorry ("signature inheritance, base type `%s' ignored",
1476 IDENTIFIER_POINTER (access_specifier));
1477 result = build_tree_list (access_public_node, type);
1479 else if (type && IS_SIGNATURE (type))
1481 error ("signature name not allowed as base class");
1485 result = build_tree_list (access_specifier, type);