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, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
7 2008, 2009 Free Software Foundation, Inc.
8 Written by Mark Mitchell (mmitchell@usa.net) based on code found
9 formerly in parse.y and pt.c.
11 This file is part of GCC.
13 GCC is free software; you can redistribute it and/or modify it
14 under the terms of the GNU General Public License as published by
15 the Free Software Foundation; either version 3, or (at your option)
18 GCC is distributed in the hope that it will be useful, but
19 WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 General Public License for more details.
23 You should have received a copy of the GNU General Public License
24 along with GCC; see the file COPYING3. If not see
25 <http://www.gnu.org/licenses/>. */
29 #include "coretypes.h"
34 #include "tree-inline.h"
35 #include "tree-mudflap.h"
44 #include "diagnostic.h"
46 #include "tree-iterator.h"
51 /* There routines provide a modular interface to perform many parsing
52 operations. They may therefore be used during actual parsing, or
53 during template instantiation, which may be regarded as a
54 degenerate form of parsing. */
56 static tree maybe_convert_cond (tree);
57 static tree finalize_nrv_r (tree *, int *, void *);
60 /* Deferred Access Checking Overview
61 ---------------------------------
63 Most C++ expressions and declarations require access checking
64 to be performed during parsing. However, in several cases,
65 this has to be treated differently.
67 For member declarations, access checking has to be deferred
68 until more information about the declaration is known. For
80 When we are parsing the function return type `A::X', we don't
81 really know if this is allowed until we parse the function name.
83 Furthermore, some contexts require that access checking is
84 never performed at all. These include class heads, and template
87 Typical use of access checking functions is described here:
89 1. When we enter a context that requires certain access checking
90 mode, the function `push_deferring_access_checks' is called with
91 DEFERRING argument specifying the desired mode. Access checking
92 may be performed immediately (dk_no_deferred), deferred
93 (dk_deferred), or not performed (dk_no_check).
95 2. When a declaration such as a type, or a variable, is encountered,
96 the function `perform_or_defer_access_check' is called. It
97 maintains a VEC of all deferred checks.
99 3. The global `current_class_type' or `current_function_decl' is then
100 setup by the parser. `enforce_access' relies on these information
103 4. Upon exiting the context mentioned in step 1,
104 `perform_deferred_access_checks' is called to check all declaration
105 stored in the VEC. `pop_deferring_access_checks' is then
106 called to restore the previous access checking mode.
108 In case of parsing error, we simply call `pop_deferring_access_checks'
109 without `perform_deferred_access_checks'. */
111 typedef struct GTY(()) deferred_access {
112 /* A VEC representing name-lookups for which we have deferred
113 checking access controls. We cannot check the accessibility of
114 names used in a decl-specifier-seq until we know what is being
115 declared because code like:
122 A::B* A::f() { return 0; }
124 is valid, even though `A::B' is not generally accessible. */
125 VEC (deferred_access_check,gc)* GTY(()) deferred_access_checks;
127 /* The current mode of access checks. */
128 enum deferring_kind deferring_access_checks_kind;
131 DEF_VEC_O (deferred_access);
132 DEF_VEC_ALLOC_O (deferred_access,gc);
134 /* Data for deferred access checking. */
135 static GTY(()) VEC(deferred_access,gc) *deferred_access_stack;
136 static GTY(()) unsigned deferred_access_no_check;
138 /* Save the current deferred access states and start deferred
139 access checking iff DEFER_P is true. */
142 push_deferring_access_checks (deferring_kind deferring)
144 /* For context like template instantiation, access checking
145 disabling applies to all nested context. */
146 if (deferred_access_no_check || deferring == dk_no_check)
147 deferred_access_no_check++;
150 deferred_access *ptr;
152 ptr = VEC_safe_push (deferred_access, gc, deferred_access_stack, NULL);
153 ptr->deferred_access_checks = NULL;
154 ptr->deferring_access_checks_kind = deferring;
158 /* Resume deferring access checks again after we stopped doing
162 resume_deferring_access_checks (void)
164 if (!deferred_access_no_check)
165 VEC_last (deferred_access, deferred_access_stack)
166 ->deferring_access_checks_kind = dk_deferred;
169 /* Stop deferring access checks. */
172 stop_deferring_access_checks (void)
174 if (!deferred_access_no_check)
175 VEC_last (deferred_access, deferred_access_stack)
176 ->deferring_access_checks_kind = dk_no_deferred;
179 /* Discard the current deferred access checks and restore the
183 pop_deferring_access_checks (void)
185 if (deferred_access_no_check)
186 deferred_access_no_check--;
188 VEC_pop (deferred_access, deferred_access_stack);
191 /* Returns a TREE_LIST representing the deferred checks.
192 The TREE_PURPOSE of each node is the type through which the
193 access occurred; the TREE_VALUE is the declaration named.
196 VEC (deferred_access_check,gc)*
197 get_deferred_access_checks (void)
199 if (deferred_access_no_check)
202 return (VEC_last (deferred_access, deferred_access_stack)
203 ->deferred_access_checks);
206 /* Take current deferred checks and combine with the
207 previous states if we also defer checks previously.
208 Otherwise perform checks now. */
211 pop_to_parent_deferring_access_checks (void)
213 if (deferred_access_no_check)
214 deferred_access_no_check--;
217 VEC (deferred_access_check,gc) *checks;
218 deferred_access *ptr;
220 checks = (VEC_last (deferred_access, deferred_access_stack)
221 ->deferred_access_checks);
223 VEC_pop (deferred_access, deferred_access_stack);
224 ptr = VEC_last (deferred_access, deferred_access_stack);
225 if (ptr->deferring_access_checks_kind == dk_no_deferred)
228 perform_access_checks (checks);
232 /* Merge with parent. */
234 deferred_access_check *chk, *probe;
237 VEC_iterate (deferred_access_check, checks, i, chk) ;
241 VEC_iterate (deferred_access_check,
242 ptr->deferred_access_checks, j, probe) ;
245 if (probe->binfo == chk->binfo &&
246 probe->decl == chk->decl &&
247 probe->diag_decl == chk->diag_decl)
250 /* Insert into parent's checks. */
251 VEC_safe_push (deferred_access_check, gc,
252 ptr->deferred_access_checks, chk);
259 /* Perform the access checks in CHECKS. The TREE_PURPOSE of each node
260 is the BINFO indicating the qualifying scope used to access the
261 DECL node stored in the TREE_VALUE of the node. */
264 perform_access_checks (VEC (deferred_access_check,gc)* checks)
267 deferred_access_check *chk;
272 for (i = 0 ; VEC_iterate (deferred_access_check, checks, i, chk) ; ++i)
273 enforce_access (chk->binfo, chk->decl, chk->diag_decl);
276 /* Perform the deferred access checks.
278 After performing the checks, we still have to keep the list
279 `deferred_access_stack->deferred_access_checks' since we may want
280 to check access for them again later in a different context.
287 A::X A::a, x; // No error for `A::a', error for `x'
289 We have to perform deferred access of `A::X', first with `A::a',
293 perform_deferred_access_checks (void)
295 perform_access_checks (get_deferred_access_checks ());
298 /* Defer checking the accessibility of DECL, when looked up in
299 BINFO. DIAG_DECL is the declaration to use to print diagnostics. */
302 perform_or_defer_access_check (tree binfo, tree decl, tree diag_decl)
305 deferred_access *ptr;
306 deferred_access_check *chk;
307 deferred_access_check *new_access;
310 /* Exit if we are in a context that no access checking is performed.
312 if (deferred_access_no_check)
315 gcc_assert (TREE_CODE (binfo) == TREE_BINFO);
317 ptr = VEC_last (deferred_access, deferred_access_stack);
319 /* If we are not supposed to defer access checks, just check now. */
320 if (ptr->deferring_access_checks_kind == dk_no_deferred)
322 enforce_access (binfo, decl, diag_decl);
326 /* See if we are already going to perform this check. */
328 VEC_iterate (deferred_access_check,
329 ptr->deferred_access_checks, i, chk) ;
332 if (chk->decl == decl && chk->binfo == binfo &&
333 chk->diag_decl == diag_decl)
338 /* If not, record the check. */
340 VEC_safe_push (deferred_access_check, gc,
341 ptr->deferred_access_checks, 0);
342 new_access->binfo = binfo;
343 new_access->decl = decl;
344 new_access->diag_decl = diag_decl;
347 /* Returns nonzero if the current statement is a full expression,
348 i.e. temporaries created during that statement should be destroyed
349 at the end of the statement. */
352 stmts_are_full_exprs_p (void)
354 return current_stmt_tree ()->stmts_are_full_exprs_p;
357 /* T is a statement. Add it to the statement-tree. This is the C++
358 version. The C/ObjC frontends have a slightly different version of
364 enum tree_code code = TREE_CODE (t);
366 if (EXPR_P (t) && code != LABEL_EXPR)
368 if (!EXPR_HAS_LOCATION (t))
369 SET_EXPR_LOCATION (t, input_location);
371 /* When we expand a statement-tree, we must know whether or not the
372 statements are full-expressions. We record that fact here. */
373 STMT_IS_FULL_EXPR_P (t) = stmts_are_full_exprs_p ();
376 /* Add T to the statement-tree. Non-side-effect statements need to be
377 recorded during statement expressions. */
378 append_to_statement_list_force (t, &cur_stmt_list);
383 /* Returns the stmt_tree to which statements are currently being added. */
386 current_stmt_tree (void)
389 ? &cfun->language->base.x_stmt_tree
390 : &scope_chain->x_stmt_tree);
393 /* If statements are full expressions, wrap STMT in a CLEANUP_POINT_EXPR. */
396 maybe_cleanup_point_expr (tree expr)
398 if (!processing_template_decl && stmts_are_full_exprs_p ())
399 expr = fold_build_cleanup_point_expr (TREE_TYPE (expr), expr);
403 /* Like maybe_cleanup_point_expr except have the type of the new expression be
404 void so we don't need to create a temporary variable to hold the inner
405 expression. The reason why we do this is because the original type might be
406 an aggregate and we cannot create a temporary variable for that type. */
409 maybe_cleanup_point_expr_void (tree expr)
411 if (!processing_template_decl && stmts_are_full_exprs_p ())
412 expr = fold_build_cleanup_point_expr (void_type_node, expr);
418 /* Create a declaration statement for the declaration given by the DECL. */
421 add_decl_expr (tree decl)
423 tree r = build_stmt (input_location, DECL_EXPR, decl);
424 if (DECL_INITIAL (decl)
425 || (DECL_SIZE (decl) && TREE_SIDE_EFFECTS (DECL_SIZE (decl))))
426 r = maybe_cleanup_point_expr_void (r);
430 /* Finish a scope. */
433 do_poplevel (tree stmt_list)
437 if (stmts_are_full_exprs_p ())
438 block = poplevel (kept_level_p (), 1, 0);
440 stmt_list = pop_stmt_list (stmt_list);
442 if (!processing_template_decl)
444 stmt_list = c_build_bind_expr (input_location, block, stmt_list);
445 /* ??? See c_end_compound_stmt re statement expressions. */
451 /* Begin a new scope. */
454 do_pushlevel (scope_kind sk)
456 tree ret = push_stmt_list ();
457 if (stmts_are_full_exprs_p ())
458 begin_scope (sk, NULL);
462 /* Queue a cleanup. CLEANUP is an expression/statement to be executed
463 when the current scope is exited. EH_ONLY is true when this is not
464 meant to apply to normal control flow transfer. */
467 push_cleanup (tree decl, tree cleanup, bool eh_only)
469 tree stmt = build_stmt (input_location, CLEANUP_STMT, NULL, cleanup, decl);
470 CLEANUP_EH_ONLY (stmt) = eh_only;
472 CLEANUP_BODY (stmt) = push_stmt_list ();
475 /* Begin a conditional that might contain a declaration. When generating
476 normal code, we want the declaration to appear before the statement
477 containing the conditional. When generating template code, we want the
478 conditional to be rendered as the raw DECL_EXPR. */
481 begin_cond (tree *cond_p)
483 if (processing_template_decl)
484 *cond_p = push_stmt_list ();
487 /* Finish such a conditional. */
490 finish_cond (tree *cond_p, tree expr)
492 if (processing_template_decl)
494 tree cond = pop_stmt_list (*cond_p);
495 if (TREE_CODE (cond) == DECL_EXPR)
498 if (check_for_bare_parameter_packs (expr))
499 *cond_p = error_mark_node;
504 /* If *COND_P specifies a conditional with a declaration, transform the
507 for (; A x = 42;) { }
509 while (true) { A x = 42; if (!x) break; }
510 for (;;) { A x = 42; if (!x) break; }
511 The statement list for BODY will be empty if the conditional did
512 not declare anything. */
515 simplify_loop_decl_cond (tree *cond_p, tree body)
519 if (!TREE_SIDE_EFFECTS (body))
523 *cond_p = boolean_true_node;
525 if_stmt = begin_if_stmt ();
526 cond = cp_build_unary_op (TRUTH_NOT_EXPR, cond, 0, tf_warning_or_error);
527 finish_if_stmt_cond (cond, if_stmt);
528 finish_break_stmt ();
529 finish_then_clause (if_stmt);
530 finish_if_stmt (if_stmt);
533 /* Finish a goto-statement. */
536 finish_goto_stmt (tree destination)
538 if (TREE_CODE (destination) == IDENTIFIER_NODE)
539 destination = lookup_label (destination);
541 /* We warn about unused labels with -Wunused. That means we have to
542 mark the used labels as used. */
543 if (TREE_CODE (destination) == LABEL_DECL)
544 TREE_USED (destination) = 1;
547 /* The DESTINATION is being used as an rvalue. */
548 if (!processing_template_decl)
550 destination = decay_conversion (destination);
551 destination = cp_convert (ptr_type_node, destination);
552 if (error_operand_p (destination))
555 /* We don't inline calls to functions with computed gotos.
556 Those functions are typically up to some funny business,
557 and may be depending on the labels being at particular
558 addresses, or some such. */
559 DECL_UNINLINABLE (current_function_decl) = 1;
562 check_goto (destination);
564 return add_stmt (build_stmt (input_location, GOTO_EXPR, destination));
567 /* COND is the condition-expression for an if, while, etc.,
568 statement. Convert it to a boolean value, if appropriate.
569 In addition, verify sequence points if -Wsequence-point is enabled. */
572 maybe_convert_cond (tree cond)
574 /* Empty conditions remain empty. */
578 /* Wait until we instantiate templates before doing conversion. */
579 if (processing_template_decl)
582 if (warn_sequence_point)
583 verify_sequence_points (cond);
585 /* Do the conversion. */
586 cond = convert_from_reference (cond);
588 if (TREE_CODE (cond) == MODIFY_EXPR
589 && !TREE_NO_WARNING (cond)
592 warning (OPT_Wparentheses,
593 "suggest parentheses around assignment used as truth value");
594 TREE_NO_WARNING (cond) = 1;
597 return condition_conversion (cond);
600 /* Finish an expression-statement, whose EXPRESSION is as indicated. */
603 finish_expr_stmt (tree expr)
607 if (expr != NULL_TREE)
609 if (!processing_template_decl)
611 if (warn_sequence_point)
612 verify_sequence_points (expr);
613 expr = convert_to_void (expr, "statement", tf_warning_or_error);
615 else if (!type_dependent_expression_p (expr))
616 convert_to_void (build_non_dependent_expr (expr), "statement",
617 tf_warning_or_error);
619 if (check_for_bare_parameter_packs (expr))
620 expr = error_mark_node;
622 /* Simplification of inner statement expressions, compound exprs,
623 etc can result in us already having an EXPR_STMT. */
624 if (TREE_CODE (expr) != CLEANUP_POINT_EXPR)
626 if (TREE_CODE (expr) != EXPR_STMT)
627 expr = build_stmt (input_location, EXPR_STMT, expr);
628 expr = maybe_cleanup_point_expr_void (expr);
640 /* Begin an if-statement. Returns a newly created IF_STMT if
647 scope = do_pushlevel (sk_block);
648 r = build_stmt (input_location, IF_STMT, NULL_TREE, NULL_TREE, NULL_TREE);
649 TREE_CHAIN (r) = scope;
650 begin_cond (&IF_COND (r));
654 /* Process the COND of an if-statement, which may be given by
658 finish_if_stmt_cond (tree cond, tree if_stmt)
660 finish_cond (&IF_COND (if_stmt), maybe_convert_cond (cond));
662 THEN_CLAUSE (if_stmt) = push_stmt_list ();
665 /* Finish the then-clause of an if-statement, which may be given by
669 finish_then_clause (tree if_stmt)
671 THEN_CLAUSE (if_stmt) = pop_stmt_list (THEN_CLAUSE (if_stmt));
675 /* Begin the else-clause of an if-statement. */
678 begin_else_clause (tree if_stmt)
680 ELSE_CLAUSE (if_stmt) = push_stmt_list ();
683 /* Finish the else-clause of an if-statement, which may be given by
687 finish_else_clause (tree if_stmt)
689 ELSE_CLAUSE (if_stmt) = pop_stmt_list (ELSE_CLAUSE (if_stmt));
692 /* Finish an if-statement. */
695 finish_if_stmt (tree if_stmt)
697 tree scope = TREE_CHAIN (if_stmt);
698 TREE_CHAIN (if_stmt) = NULL;
699 add_stmt (do_poplevel (scope));
703 /* Begin a while-statement. Returns a newly created WHILE_STMT if
707 begin_while_stmt (void)
710 r = build_stmt (input_location, WHILE_STMT, NULL_TREE, NULL_TREE);
712 WHILE_BODY (r) = do_pushlevel (sk_block);
713 begin_cond (&WHILE_COND (r));
717 /* Process the COND of a while-statement, which may be given by
721 finish_while_stmt_cond (tree cond, tree while_stmt)
723 finish_cond (&WHILE_COND (while_stmt), maybe_convert_cond (cond));
724 simplify_loop_decl_cond (&WHILE_COND (while_stmt), WHILE_BODY (while_stmt));
727 /* Finish a while-statement, which may be given by WHILE_STMT. */
730 finish_while_stmt (tree while_stmt)
732 WHILE_BODY (while_stmt) = do_poplevel (WHILE_BODY (while_stmt));
736 /* Begin a do-statement. Returns a newly created DO_STMT if
742 tree r = build_stmt (input_location, DO_STMT, NULL_TREE, NULL_TREE);
744 DO_BODY (r) = push_stmt_list ();
748 /* Finish the body of a do-statement, which may be given by DO_STMT. */
751 finish_do_body (tree do_stmt)
753 tree body = DO_BODY (do_stmt) = pop_stmt_list (DO_BODY (do_stmt));
755 if (TREE_CODE (body) == STATEMENT_LIST && STATEMENT_LIST_TAIL (body))
756 body = STATEMENT_LIST_TAIL (body)->stmt;
758 if (IS_EMPTY_STMT (body))
759 warning (OPT_Wempty_body,
760 "suggest explicit braces around empty body in %<do%> statement");
763 /* Finish a do-statement, which may be given by DO_STMT, and whose
764 COND is as indicated. */
767 finish_do_stmt (tree cond, tree do_stmt)
769 cond = maybe_convert_cond (cond);
770 DO_COND (do_stmt) = cond;
774 /* Finish a return-statement. The EXPRESSION returned, if any, is as
778 finish_return_stmt (tree expr)
783 expr = check_return_expr (expr, &no_warning);
785 if (flag_openmp && !check_omp_return ())
786 return error_mark_node;
787 if (!processing_template_decl)
789 if (warn_sequence_point)
790 verify_sequence_points (expr);
792 if (DECL_DESTRUCTOR_P (current_function_decl)
793 || (DECL_CONSTRUCTOR_P (current_function_decl)
794 && targetm.cxx.cdtor_returns_this ()))
796 /* Similarly, all destructors must run destructors for
797 base-classes before returning. So, all returns in a
798 destructor get sent to the DTOR_LABEL; finish_function emits
799 code to return a value there. */
800 return finish_goto_stmt (cdtor_label);
804 r = build_stmt (input_location, RETURN_EXPR, expr);
805 TREE_NO_WARNING (r) |= no_warning;
806 r = maybe_cleanup_point_expr_void (r);
813 /* Begin a for-statement. Returns a new FOR_STMT if appropriate. */
816 begin_for_stmt (void)
820 r = build_stmt (input_location, FOR_STMT, NULL_TREE, NULL_TREE,
821 NULL_TREE, NULL_TREE);
823 if (flag_new_for_scope > 0)
824 TREE_CHAIN (r) = do_pushlevel (sk_for);
826 if (processing_template_decl)
827 FOR_INIT_STMT (r) = push_stmt_list ();
832 /* Finish the for-init-statement of a for-statement, which may be
833 given by FOR_STMT. */
836 finish_for_init_stmt (tree for_stmt)
838 if (processing_template_decl)
839 FOR_INIT_STMT (for_stmt) = pop_stmt_list (FOR_INIT_STMT (for_stmt));
841 FOR_BODY (for_stmt) = do_pushlevel (sk_block);
842 begin_cond (&FOR_COND (for_stmt));
845 /* Finish the COND of a for-statement, which may be given by
849 finish_for_cond (tree cond, tree for_stmt)
851 finish_cond (&FOR_COND (for_stmt), maybe_convert_cond (cond));
852 simplify_loop_decl_cond (&FOR_COND (for_stmt), FOR_BODY (for_stmt));
855 /* Finish the increment-EXPRESSION in a for-statement, which may be
856 given by FOR_STMT. */
859 finish_for_expr (tree expr, tree for_stmt)
863 /* If EXPR is an overloaded function, issue an error; there is no
864 context available to use to perform overload resolution. */
865 if (type_unknown_p (expr))
867 cxx_incomplete_type_error (expr, TREE_TYPE (expr));
868 expr = error_mark_node;
870 if (!processing_template_decl)
872 if (warn_sequence_point)
873 verify_sequence_points (expr);
874 expr = convert_to_void (expr, "3rd expression in for",
875 tf_warning_or_error);
877 else if (!type_dependent_expression_p (expr))
878 convert_to_void (build_non_dependent_expr (expr), "3rd expression in for",
879 tf_warning_or_error);
880 expr = maybe_cleanup_point_expr_void (expr);
881 if (check_for_bare_parameter_packs (expr))
882 expr = error_mark_node;
883 FOR_EXPR (for_stmt) = expr;
886 /* Finish the body of a for-statement, which may be given by
887 FOR_STMT. The increment-EXPR for the loop must be
891 finish_for_stmt (tree for_stmt)
893 FOR_BODY (for_stmt) = do_poplevel (FOR_BODY (for_stmt));
895 /* Pop the scope for the body of the loop. */
896 if (flag_new_for_scope > 0)
898 tree scope = TREE_CHAIN (for_stmt);
899 TREE_CHAIN (for_stmt) = NULL;
900 add_stmt (do_poplevel (scope));
906 /* Finish a break-statement. */
909 finish_break_stmt (void)
911 return add_stmt (build_stmt (input_location, BREAK_STMT));
914 /* Finish a continue-statement. */
917 finish_continue_stmt (void)
919 return add_stmt (build_stmt (input_location, CONTINUE_STMT));
922 /* Begin a switch-statement. Returns a new SWITCH_STMT if
926 begin_switch_stmt (void)
930 r = build_stmt (input_location, SWITCH_STMT, NULL_TREE, NULL_TREE, NULL_TREE);
932 scope = do_pushlevel (sk_block);
933 TREE_CHAIN (r) = scope;
934 begin_cond (&SWITCH_STMT_COND (r));
939 /* Finish the cond of a switch-statement. */
942 finish_switch_cond (tree cond, tree switch_stmt)
944 tree orig_type = NULL;
945 if (!processing_template_decl)
947 /* Convert the condition to an integer or enumeration type. */
948 cond = build_expr_type_conversion (WANT_INT | WANT_ENUM, cond, true);
949 if (cond == NULL_TREE)
951 error ("switch quantity not an integer");
952 cond = error_mark_node;
954 orig_type = TREE_TYPE (cond);
955 if (cond != error_mark_node)
959 Integral promotions are performed. */
960 cond = perform_integral_promotions (cond);
961 cond = maybe_cleanup_point_expr (cond);
964 if (check_for_bare_parameter_packs (cond))
965 cond = error_mark_node;
966 else if (!processing_template_decl && warn_sequence_point)
967 verify_sequence_points (cond);
969 finish_cond (&SWITCH_STMT_COND (switch_stmt), cond);
970 SWITCH_STMT_TYPE (switch_stmt) = orig_type;
971 add_stmt (switch_stmt);
972 push_switch (switch_stmt);
973 SWITCH_STMT_BODY (switch_stmt) = push_stmt_list ();
976 /* Finish the body of a switch-statement, which may be given by
977 SWITCH_STMT. The COND to switch on is indicated. */
980 finish_switch_stmt (tree switch_stmt)
984 SWITCH_STMT_BODY (switch_stmt) =
985 pop_stmt_list (SWITCH_STMT_BODY (switch_stmt));
989 scope = TREE_CHAIN (switch_stmt);
990 TREE_CHAIN (switch_stmt) = NULL;
991 add_stmt (do_poplevel (scope));
994 /* Begin a try-block. Returns a newly-created TRY_BLOCK if
998 begin_try_block (void)
1000 tree r = build_stmt (input_location, TRY_BLOCK, NULL_TREE, NULL_TREE);
1002 TRY_STMTS (r) = push_stmt_list ();
1006 /* Likewise, for a function-try-block. The block returned in
1007 *COMPOUND_STMT is an artificial outer scope, containing the
1008 function-try-block. */
1011 begin_function_try_block (tree *compound_stmt)
1014 /* This outer scope does not exist in the C++ standard, but we need
1015 a place to put __FUNCTION__ and similar variables. */
1016 *compound_stmt = begin_compound_stmt (0);
1017 r = begin_try_block ();
1018 FN_TRY_BLOCK_P (r) = 1;
1022 /* Finish a try-block, which may be given by TRY_BLOCK. */
1025 finish_try_block (tree try_block)
1027 TRY_STMTS (try_block) = pop_stmt_list (TRY_STMTS (try_block));
1028 TRY_HANDLERS (try_block) = push_stmt_list ();
1031 /* Finish the body of a cleanup try-block, which may be given by
1035 finish_cleanup_try_block (tree try_block)
1037 TRY_STMTS (try_block) = pop_stmt_list (TRY_STMTS (try_block));
1040 /* Finish an implicitly generated try-block, with a cleanup is given
1044 finish_cleanup (tree cleanup, tree try_block)
1046 TRY_HANDLERS (try_block) = cleanup;
1047 CLEANUP_P (try_block) = 1;
1050 /* Likewise, for a function-try-block. */
1053 finish_function_try_block (tree try_block)
1055 finish_try_block (try_block);
1056 /* FIXME : something queer about CTOR_INITIALIZER somehow following
1057 the try block, but moving it inside. */
1058 in_function_try_handler = 1;
1061 /* Finish a handler-sequence for a try-block, which may be given by
1065 finish_handler_sequence (tree try_block)
1067 TRY_HANDLERS (try_block) = pop_stmt_list (TRY_HANDLERS (try_block));
1068 check_handlers (TRY_HANDLERS (try_block));
1071 /* Finish the handler-seq for a function-try-block, given by
1072 TRY_BLOCK. COMPOUND_STMT is the outer block created by
1073 begin_function_try_block. */
1076 finish_function_handler_sequence (tree try_block, tree compound_stmt)
1078 in_function_try_handler = 0;
1079 finish_handler_sequence (try_block);
1080 finish_compound_stmt (compound_stmt);
1083 /* Begin a handler. Returns a HANDLER if appropriate. */
1086 begin_handler (void)
1090 r = build_stmt (input_location, HANDLER, NULL_TREE, NULL_TREE);
1093 /* Create a binding level for the eh_info and the exception object
1095 HANDLER_BODY (r) = do_pushlevel (sk_catch);
1100 /* Finish the handler-parameters for a handler, which may be given by
1101 HANDLER. DECL is the declaration for the catch parameter, or NULL
1102 if this is a `catch (...)' clause. */
1105 finish_handler_parms (tree decl, tree handler)
1107 tree type = NULL_TREE;
1108 if (processing_template_decl)
1112 decl = pushdecl (decl);
1113 decl = push_template_decl (decl);
1114 HANDLER_PARMS (handler) = decl;
1115 type = TREE_TYPE (decl);
1119 type = expand_start_catch_block (decl);
1120 HANDLER_TYPE (handler) = type;
1121 if (!processing_template_decl && type)
1122 mark_used (eh_type_info (type));
1125 /* Finish a handler, which may be given by HANDLER. The BLOCKs are
1126 the return value from the matching call to finish_handler_parms. */
1129 finish_handler (tree handler)
1131 if (!processing_template_decl)
1132 expand_end_catch_block ();
1133 HANDLER_BODY (handler) = do_poplevel (HANDLER_BODY (handler));
1136 /* Begin a compound statement. FLAGS contains some bits that control the
1137 behavior and context. If BCS_NO_SCOPE is set, the compound statement
1138 does not define a scope. If BCS_FN_BODY is set, this is the outermost
1139 block of a function. If BCS_TRY_BLOCK is set, this is the block
1140 created on behalf of a TRY statement. Returns a token to be passed to
1141 finish_compound_stmt. */
1144 begin_compound_stmt (unsigned int flags)
1148 if (flags & BCS_NO_SCOPE)
1150 r = push_stmt_list ();
1151 STATEMENT_LIST_NO_SCOPE (r) = 1;
1153 /* Normally, we try hard to keep the BLOCK for a statement-expression.
1154 But, if it's a statement-expression with a scopeless block, there's
1155 nothing to keep, and we don't want to accidentally keep a block
1156 *inside* the scopeless block. */
1157 keep_next_level (false);
1160 r = do_pushlevel (flags & BCS_TRY_BLOCK ? sk_try : sk_block);
1162 /* When processing a template, we need to remember where the braces were,
1163 so that we can set up identical scopes when instantiating the template
1164 later. BIND_EXPR is a handy candidate for this.
1165 Note that do_poplevel won't create a BIND_EXPR itself here (and thus
1166 result in nested BIND_EXPRs), since we don't build BLOCK nodes when
1167 processing templates. */
1168 if (processing_template_decl)
1170 r = build3 (BIND_EXPR, NULL, NULL, r, NULL);
1171 BIND_EXPR_TRY_BLOCK (r) = (flags & BCS_TRY_BLOCK) != 0;
1172 BIND_EXPR_BODY_BLOCK (r) = (flags & BCS_FN_BODY) != 0;
1173 TREE_SIDE_EFFECTS (r) = 1;
1179 /* Finish a compound-statement, which is given by STMT. */
1182 finish_compound_stmt (tree stmt)
1184 if (TREE_CODE (stmt) == BIND_EXPR)
1185 BIND_EXPR_BODY (stmt) = do_poplevel (BIND_EXPR_BODY (stmt));
1186 else if (STATEMENT_LIST_NO_SCOPE (stmt))
1187 stmt = pop_stmt_list (stmt);
1190 /* Destroy any ObjC "super" receivers that may have been
1192 objc_clear_super_receiver ();
1194 stmt = do_poplevel (stmt);
1197 /* ??? See c_end_compound_stmt wrt statement expressions. */
1202 /* Finish an asm-statement, whose components are a STRING, some
1203 OUTPUT_OPERANDS, some INPUT_OPERANDS, and some CLOBBERS. Also note
1204 whether the asm-statement should be considered volatile. */
1207 finish_asm_stmt (int volatile_p, tree string, tree output_operands,
1208 tree input_operands, tree clobbers)
1212 int ninputs = list_length (input_operands);
1213 int noutputs = list_length (output_operands);
1215 if (!processing_template_decl)
1217 const char *constraint;
1218 const char **oconstraints;
1219 bool allows_mem, allows_reg, is_inout;
1223 oconstraints = (const char **) alloca (noutputs * sizeof (char *));
1225 string = resolve_asm_operand_names (string, output_operands,
1228 for (i = 0, t = output_operands; t; t = TREE_CHAIN (t), ++i)
1230 operand = TREE_VALUE (t);
1232 /* ??? Really, this should not be here. Users should be using a
1233 proper lvalue, dammit. But there's a long history of using
1234 casts in the output operands. In cases like longlong.h, this
1235 becomes a primitive form of typechecking -- if the cast can be
1236 removed, then the output operand had a type of the proper width;
1237 otherwise we'll get an error. Gross, but ... */
1238 STRIP_NOPS (operand);
1240 if (!lvalue_or_else (operand, lv_asm, tf_warning_or_error))
1241 operand = error_mark_node;
1243 if (operand != error_mark_node
1244 && (TREE_READONLY (operand)
1245 || CP_TYPE_CONST_P (TREE_TYPE (operand))
1246 /* Functions are not modifiable, even though they are
1248 || TREE_CODE (TREE_TYPE (operand)) == FUNCTION_TYPE
1249 || TREE_CODE (TREE_TYPE (operand)) == METHOD_TYPE
1250 /* If it's an aggregate and any field is const, then it is
1251 effectively const. */
1252 || (CLASS_TYPE_P (TREE_TYPE (operand))
1253 && C_TYPE_FIELDS_READONLY (TREE_TYPE (operand)))))
1254 readonly_error (operand, "assignment (via 'asm' output)");
1256 constraint = TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (t)));
1257 oconstraints[i] = constraint;
1259 if (parse_output_constraint (&constraint, i, ninputs, noutputs,
1260 &allows_mem, &allows_reg, &is_inout))
1262 /* If the operand is going to end up in memory,
1263 mark it addressable. */
1264 if (!allows_reg && !cxx_mark_addressable (operand))
1265 operand = error_mark_node;
1268 operand = error_mark_node;
1270 TREE_VALUE (t) = operand;
1273 for (i = 0, t = input_operands; t; ++i, t = TREE_CHAIN (t))
1275 constraint = TREE_STRING_POINTER (TREE_VALUE (TREE_PURPOSE (t)));
1276 operand = decay_conversion (TREE_VALUE (t));
1278 /* If the type of the operand hasn't been determined (e.g.,
1279 because it involves an overloaded function), then issue
1280 an error message. There's no context available to
1281 resolve the overloading. */
1282 if (TREE_TYPE (operand) == unknown_type_node)
1284 error ("type of asm operand %qE could not be determined",
1286 operand = error_mark_node;
1289 if (parse_input_constraint (&constraint, i, ninputs, noutputs, 0,
1290 oconstraints, &allows_mem, &allows_reg))
1292 /* If the operand is going to end up in memory,
1293 mark it addressable. */
1294 if (!allows_reg && allows_mem)
1296 /* Strip the nops as we allow this case. FIXME, this really
1297 should be rejected or made deprecated. */
1298 STRIP_NOPS (operand);
1299 if (!cxx_mark_addressable (operand))
1300 operand = error_mark_node;
1304 operand = error_mark_node;
1306 TREE_VALUE (t) = operand;
1310 r = build_stmt (input_location, ASM_EXPR, string,
1311 output_operands, input_operands,
1313 ASM_VOLATILE_P (r) = volatile_p || noutputs == 0;
1314 r = maybe_cleanup_point_expr_void (r);
1315 return add_stmt (r);
1318 /* Finish a label with the indicated NAME. Returns the new label. */
1321 finish_label_stmt (tree name)
1323 tree decl = define_label (input_location, name);
1325 if (decl == error_mark_node)
1326 return error_mark_node;
1328 add_stmt (build_stmt (input_location, LABEL_EXPR, decl));
1333 /* Finish a series of declarations for local labels. G++ allows users
1334 to declare "local" labels, i.e., labels with scope. This extension
1335 is useful when writing code involving statement-expressions. */
1338 finish_label_decl (tree name)
1340 if (!at_function_scope_p ())
1342 error ("__label__ declarations are only allowed in function scopes");
1346 add_decl_expr (declare_local_label (name));
1349 /* When DECL goes out of scope, make sure that CLEANUP is executed. */
1352 finish_decl_cleanup (tree decl, tree cleanup)
1354 push_cleanup (decl, cleanup, false);
1357 /* If the current scope exits with an exception, run CLEANUP. */
1360 finish_eh_cleanup (tree cleanup)
1362 push_cleanup (NULL, cleanup, true);
1365 /* The MEM_INITS is a list of mem-initializers, in reverse of the
1366 order they were written by the user. Each node is as for
1367 emit_mem_initializers. */
1370 finish_mem_initializers (tree mem_inits)
1372 /* Reorder the MEM_INITS so that they are in the order they appeared
1373 in the source program. */
1374 mem_inits = nreverse (mem_inits);
1376 if (processing_template_decl)
1380 for (mem = mem_inits; mem; mem = TREE_CHAIN (mem))
1382 /* If the TREE_PURPOSE is a TYPE_PACK_EXPANSION, skip the
1383 check for bare parameter packs in the TREE_VALUE, because
1384 any parameter packs in the TREE_VALUE have already been
1385 bound as part of the TREE_PURPOSE. See
1386 make_pack_expansion for more information. */
1387 if (TREE_CODE (TREE_PURPOSE (mem)) != TYPE_PACK_EXPANSION
1388 && check_for_bare_parameter_packs (TREE_VALUE (mem)))
1389 TREE_VALUE (mem) = error_mark_node;
1392 add_stmt (build_min_nt (CTOR_INITIALIZER, mem_inits));
1395 emit_mem_initializers (mem_inits);
1398 /* Finish a parenthesized expression EXPR. */
1401 finish_parenthesized_expr (tree expr)
1404 /* This inhibits warnings in c_common_truthvalue_conversion. */
1405 TREE_NO_WARNING (expr) = 1;
1407 if (TREE_CODE (expr) == OFFSET_REF)
1408 /* [expr.unary.op]/3 The qualified id of a pointer-to-member must not be
1409 enclosed in parentheses. */
1410 PTRMEM_OK_P (expr) = 0;
1412 if (TREE_CODE (expr) == STRING_CST)
1413 PAREN_STRING_LITERAL_P (expr) = 1;
1418 /* Finish a reference to a non-static data member (DECL) that is not
1419 preceded by `.' or `->'. */
1422 finish_non_static_data_member (tree decl, tree object, tree qualifying_scope)
1424 gcc_assert (TREE_CODE (decl) == FIELD_DECL);
1426 if (!object && cp_unevaluated_operand != 0)
1428 /* DR 613: Can use non-static data members without an associated
1429 object in sizeof/decltype/alignof. */
1430 tree scope = qualifying_scope;
1431 if (scope == NULL_TREE)
1432 scope = context_for_name_lookup (decl);
1433 object = maybe_dummy_object (scope, NULL);
1438 if (current_function_decl
1439 && DECL_STATIC_FUNCTION_P (current_function_decl))
1440 error ("invalid use of member %q+D in static member function", decl);
1442 error ("invalid use of non-static data member %q+D", decl);
1443 error ("from this location");
1445 return error_mark_node;
1447 if (current_class_ptr)
1448 TREE_USED (current_class_ptr) = 1;
1449 if (processing_template_decl && !qualifying_scope)
1451 tree type = TREE_TYPE (decl);
1453 if (TREE_CODE (type) == REFERENCE_TYPE)
1454 type = TREE_TYPE (type);
1457 /* Set the cv qualifiers. */
1458 int quals = (current_class_ref
1459 ? cp_type_quals (TREE_TYPE (current_class_ref))
1460 : TYPE_UNQUALIFIED);
1462 if (DECL_MUTABLE_P (decl))
1463 quals &= ~TYPE_QUAL_CONST;
1465 quals |= cp_type_quals (TREE_TYPE (decl));
1466 type = cp_build_qualified_type (type, quals);
1469 return build_min (COMPONENT_REF, type, object, decl, NULL_TREE);
1473 tree access_type = TREE_TYPE (object);
1474 tree lookup_context = context_for_name_lookup (decl);
1476 while (!DERIVED_FROM_P (lookup_context, access_type))
1478 access_type = TYPE_CONTEXT (access_type);
1479 while (access_type && DECL_P (access_type))
1480 access_type = DECL_CONTEXT (access_type);
1484 error ("object missing in reference to %q+D", decl);
1485 error ("from this location");
1486 return error_mark_node;
1490 /* If PROCESSING_TEMPLATE_DECL is nonzero here, then
1491 QUALIFYING_SCOPE is also non-null. Wrap this in a SCOPE_REF
1493 if (processing_template_decl)
1494 return build_qualified_name (TREE_TYPE (decl),
1497 /*template_p=*/false);
1499 perform_or_defer_access_check (TYPE_BINFO (access_type), decl,
1502 /* If the data member was named `C::M', convert `*this' to `C'
1504 if (qualifying_scope)
1506 tree binfo = NULL_TREE;
1507 object = build_scoped_ref (object, qualifying_scope,
1511 return build_class_member_access_expr (object, decl,
1512 /*access_path=*/NULL_TREE,
1513 /*preserve_reference=*/false,
1514 tf_warning_or_error);
1518 /* DECL was the declaration to which a qualified-id resolved. Issue
1519 an error message if it is not accessible. If OBJECT_TYPE is
1520 non-NULL, we have just seen `x->' or `x.' and OBJECT_TYPE is the
1521 type of `*x', or `x', respectively. If the DECL was named as
1522 `A::B' then NESTED_NAME_SPECIFIER is `A'. */
1525 check_accessibility_of_qualified_id (tree decl,
1527 tree nested_name_specifier)
1530 tree qualifying_type = NULL_TREE;
1532 /* If we are parsing a template declaration and if decl is a typedef,
1533 add it to a list tied to the template.
1534 At template instantiation time, that list will be walked and
1535 access check performed. */
1536 if (is_typedef_decl (decl))
1538 /* This the scope through which type_decl is accessed.
1539 It will be useful information later to do access check for
1541 tree scope = nested_name_specifier
1542 ? nested_name_specifier
1543 : DECL_CONTEXT (decl);
1544 tree templ_info = NULL;
1545 tree cs = current_scope ();
1547 if (cs && (CLASS_TYPE_P (cs) || TREE_CODE (cs) == FUNCTION_DECL))
1548 templ_info = get_template_info (cs);
1551 && TI_TEMPLATE (templ_info)
1553 && CLASS_TYPE_P (scope)
1554 && !currently_open_class (scope))
1555 append_type_to_template_for_access_check (current_scope (), decl, scope);
1558 /* If we're not checking, return immediately. */
1559 if (deferred_access_no_check)
1562 /* Determine the SCOPE of DECL. */
1563 scope = context_for_name_lookup (decl);
1564 /* If the SCOPE is not a type, then DECL is not a member. */
1565 if (!TYPE_P (scope))
1567 /* Compute the scope through which DECL is being accessed. */
1569 /* OBJECT_TYPE might not be a class type; consider:
1571 class A { typedef int I; };
1575 In this case, we will have "A::I" as the DECL, but "I" as the
1577 && CLASS_TYPE_P (object_type)
1578 && DERIVED_FROM_P (scope, object_type))
1579 /* If we are processing a `->' or `.' expression, use the type of the
1581 qualifying_type = object_type;
1582 else if (nested_name_specifier)
1584 /* If the reference is to a non-static member of the
1585 current class, treat it as if it were referenced through
1587 if (DECL_NONSTATIC_MEMBER_P (decl)
1588 && current_class_ptr
1589 && DERIVED_FROM_P (scope, current_class_type))
1590 qualifying_type = current_class_type;
1591 /* Otherwise, use the type indicated by the
1592 nested-name-specifier. */
1594 qualifying_type = nested_name_specifier;
1597 /* Otherwise, the name must be from the current class or one of
1599 qualifying_type = currently_open_derived_class (scope);
1602 /* It is possible for qualifying type to be a TEMPLATE_TYPE_PARM
1603 or similar in a default argument value. */
1604 && CLASS_TYPE_P (qualifying_type)
1605 && !dependent_type_p (qualifying_type))
1606 perform_or_defer_access_check (TYPE_BINFO (qualifying_type), decl,
1610 /* EXPR is the result of a qualified-id. The QUALIFYING_CLASS was the
1611 class named to the left of the "::" operator. DONE is true if this
1612 expression is a complete postfix-expression; it is false if this
1613 expression is followed by '->', '[', '(', etc. ADDRESS_P is true
1614 iff this expression is the operand of '&'. TEMPLATE_P is true iff
1615 the qualified-id was of the form "A::template B". TEMPLATE_ARG_P
1616 is true iff this qualified name appears as a template argument. */
1619 finish_qualified_id_expr (tree qualifying_class,
1624 bool template_arg_p)
1626 gcc_assert (TYPE_P (qualifying_class));
1628 if (error_operand_p (expr))
1629 return error_mark_node;
1631 if (DECL_P (expr) || BASELINK_P (expr))
1635 check_template_keyword (expr);
1637 /* If EXPR occurs as the operand of '&', use special handling that
1638 permits a pointer-to-member. */
1639 if (address_p && done)
1641 if (TREE_CODE (expr) == SCOPE_REF)
1642 expr = TREE_OPERAND (expr, 1);
1643 expr = build_offset_ref (qualifying_class, expr,
1644 /*address_p=*/true);
1648 /* Within the scope of a class, turn references to non-static
1649 members into expression of the form "this->...". */
1651 /* But, within a template argument, we do not want make the
1652 transformation, as there is no "this" pointer. */
1654 else if (TREE_CODE (expr) == FIELD_DECL)
1656 push_deferring_access_checks (dk_no_check);
1657 expr = finish_non_static_data_member (expr, current_class_ref,
1659 pop_deferring_access_checks ();
1661 else if (BASELINK_P (expr) && !processing_template_decl)
1665 /* See if any of the functions are non-static members. */
1666 fns = BASELINK_FUNCTIONS (expr);
1667 if (TREE_CODE (fns) == TEMPLATE_ID_EXPR)
1668 fns = TREE_OPERAND (fns, 0);
1669 /* If so, the expression may be relative to 'this'. */
1670 if (!shared_member_p (fns)
1671 && current_class_ref
1672 && DERIVED_FROM_P (qualifying_class, TREE_TYPE (current_class_ref)))
1673 expr = (build_class_member_access_expr
1674 (maybe_dummy_object (qualifying_class, NULL),
1676 BASELINK_ACCESS_BINFO (expr),
1677 /*preserve_reference=*/false,
1678 tf_warning_or_error));
1680 /* The expression is a qualified name whose address is not
1682 expr = build_offset_ref (qualifying_class, expr, /*address_p=*/false);
1688 /* Begin a statement-expression. The value returned must be passed to
1689 finish_stmt_expr. */
1692 begin_stmt_expr (void)
1694 return push_stmt_list ();
1697 /* Process the final expression of a statement expression. EXPR can be
1698 NULL, if the final expression is empty. Return a STATEMENT_LIST
1699 containing all the statements in the statement-expression, or
1700 ERROR_MARK_NODE if there was an error. */
1703 finish_stmt_expr_expr (tree expr, tree stmt_expr)
1705 if (error_operand_p (expr))
1707 /* The type of the statement-expression is the type of the last
1709 TREE_TYPE (stmt_expr) = error_mark_node;
1710 return error_mark_node;
1713 /* If the last statement does not have "void" type, then the value
1714 of the last statement is the value of the entire expression. */
1717 tree type = TREE_TYPE (expr);
1719 if (processing_template_decl)
1721 expr = build_stmt (input_location, EXPR_STMT, expr);
1722 expr = add_stmt (expr);
1723 /* Mark the last statement so that we can recognize it as such at
1724 template-instantiation time. */
1725 EXPR_STMT_STMT_EXPR_RESULT (expr) = 1;
1727 else if (VOID_TYPE_P (type))
1729 /* Just treat this like an ordinary statement. */
1730 expr = finish_expr_stmt (expr);
1734 /* It actually has a value we need to deal with. First, force it
1735 to be an rvalue so that we won't need to build up a copy
1736 constructor call later when we try to assign it to something. */
1737 expr = force_rvalue (expr);
1738 if (error_operand_p (expr))
1739 return error_mark_node;
1741 /* Update for array-to-pointer decay. */
1742 type = TREE_TYPE (expr);
1744 /* Wrap it in a CLEANUP_POINT_EXPR and add it to the list like a
1745 normal statement, but don't convert to void or actually add
1747 if (TREE_CODE (expr) != CLEANUP_POINT_EXPR)
1748 expr = maybe_cleanup_point_expr (expr);
1752 /* The type of the statement-expression is the type of the last
1754 TREE_TYPE (stmt_expr) = type;
1760 /* Finish a statement-expression. EXPR should be the value returned
1761 by the previous begin_stmt_expr. Returns an expression
1762 representing the statement-expression. */
1765 finish_stmt_expr (tree stmt_expr, bool has_no_scope)
1770 if (error_operand_p (stmt_expr))
1772 pop_stmt_list (stmt_expr);
1773 return error_mark_node;
1776 gcc_assert (TREE_CODE (stmt_expr) == STATEMENT_LIST);
1778 type = TREE_TYPE (stmt_expr);
1779 result = pop_stmt_list (stmt_expr);
1780 TREE_TYPE (result) = type;
1782 if (processing_template_decl)
1784 result = build_min (STMT_EXPR, type, result);
1785 TREE_SIDE_EFFECTS (result) = 1;
1786 STMT_EXPR_NO_SCOPE (result) = has_no_scope;
1788 else if (CLASS_TYPE_P (type))
1790 /* Wrap the statement-expression in a TARGET_EXPR so that the
1791 temporary object created by the final expression is destroyed at
1792 the end of the full-expression containing the
1793 statement-expression. */
1794 result = force_target_expr (type, result);
1800 /* Returns the expression which provides the value of STMT_EXPR. */
1803 stmt_expr_value_expr (tree stmt_expr)
1805 tree t = STMT_EXPR_STMT (stmt_expr);
1807 if (TREE_CODE (t) == BIND_EXPR)
1808 t = BIND_EXPR_BODY (t);
1810 if (TREE_CODE (t) == STATEMENT_LIST && STATEMENT_LIST_TAIL (t))
1811 t = STATEMENT_LIST_TAIL (t)->stmt;
1813 if (TREE_CODE (t) == EXPR_STMT)
1814 t = EXPR_STMT_EXPR (t);
1819 /* Perform Koenig lookup. FN is the postfix-expression representing
1820 the function (or functions) to call; ARGS are the arguments to the
1821 call. Returns the functions to be considered by overload
1825 perform_koenig_lookup (tree fn, VEC(tree,gc) *args)
1827 tree identifier = NULL_TREE;
1828 tree functions = NULL_TREE;
1829 tree tmpl_args = NULL_TREE;
1830 bool template_id = false;
1832 if (TREE_CODE (fn) == TEMPLATE_ID_EXPR)
1834 /* Use a separate flag to handle null args. */
1836 tmpl_args = TREE_OPERAND (fn, 1);
1837 fn = TREE_OPERAND (fn, 0);
1840 /* Find the name of the overloaded function. */
1841 if (TREE_CODE (fn) == IDENTIFIER_NODE)
1843 else if (is_overloaded_fn (fn))
1846 identifier = DECL_NAME (get_first_fn (functions));
1848 else if (DECL_P (fn))
1851 identifier = DECL_NAME (fn);
1854 /* A call to a namespace-scope function using an unqualified name.
1856 Do Koenig lookup -- unless any of the arguments are
1858 if (!any_type_dependent_arguments_p (args)
1859 && !any_dependent_template_arguments_p (tmpl_args))
1861 fn = lookup_arg_dependent (identifier, functions, args);
1863 /* The unqualified name could not be resolved. */
1864 fn = unqualified_fn_lookup_error (identifier);
1867 if (fn && template_id)
1868 fn = build2 (TEMPLATE_ID_EXPR, unknown_type_node, fn, tmpl_args);
1873 /* Generate an expression for `FN (ARGS)'. This may change the
1876 If DISALLOW_VIRTUAL is true, the call to FN will be not generated
1877 as a virtual call, even if FN is virtual. (This flag is set when
1878 encountering an expression where the function name is explicitly
1879 qualified. For example a call to `X::f' never generates a virtual
1882 Returns code for the call. */
1885 finish_call_expr (tree fn, VEC(tree,gc) **args, bool disallow_virtual,
1886 bool koenig_p, tsubst_flags_t complain)
1890 VEC(tree,gc) *orig_args = NULL;
1892 if (fn == error_mark_node)
1893 return error_mark_node;
1895 gcc_assert (!TYPE_P (fn));
1899 if (processing_template_decl)
1901 if (type_dependent_expression_p (fn)
1902 || any_type_dependent_arguments_p (*args))
1904 result = build_nt_call_vec (fn, *args);
1905 KOENIG_LOOKUP_P (result) = koenig_p;
1910 tree fndecl = OVL_CURRENT (fn);
1911 if (TREE_CODE (fndecl) != FUNCTION_DECL
1912 || !TREE_THIS_VOLATILE (fndecl))
1918 current_function_returns_abnormally = 1;
1922 orig_args = make_tree_vector_copy (*args);
1923 if (!BASELINK_P (fn)
1924 && TREE_CODE (fn) != PSEUDO_DTOR_EXPR
1925 && TREE_TYPE (fn) != unknown_type_node)
1926 fn = build_non_dependent_expr (fn);
1927 make_args_non_dependent (*args);
1930 if (is_overloaded_fn (fn))
1931 fn = baselink_for_fns (fn);
1934 if (BASELINK_P (fn))
1938 /* A call to a member function. From [over.call.func]:
1940 If the keyword this is in scope and refers to the class of
1941 that member function, or a derived class thereof, then the
1942 function call is transformed into a qualified function call
1943 using (*this) as the postfix-expression to the left of the
1944 . operator.... [Otherwise] a contrived object of type T
1945 becomes the implied object argument.
1947 This paragraph is unclear about this situation:
1949 struct A { void f(); };
1950 struct B : public A {};
1951 struct C : public A { void g() { B::f(); }};
1953 In particular, for `B::f', this paragraph does not make clear
1954 whether "the class of that member function" refers to `A' or
1955 to `B'. We believe it refers to `B'. */
1956 if (current_class_type
1957 && DERIVED_FROM_P (BINFO_TYPE (BASELINK_ACCESS_BINFO (fn)),
1959 && current_class_ref)
1960 object = maybe_dummy_object (BINFO_TYPE (BASELINK_ACCESS_BINFO (fn)),
1964 tree representative_fn;
1966 representative_fn = BASELINK_FUNCTIONS (fn);
1967 if (TREE_CODE (representative_fn) == TEMPLATE_ID_EXPR)
1968 representative_fn = TREE_OPERAND (representative_fn, 0);
1969 representative_fn = get_first_fn (representative_fn);
1970 object = build_dummy_object (DECL_CONTEXT (representative_fn));
1973 if (processing_template_decl)
1975 if (type_dependent_expression_p (object))
1977 tree ret = build_nt_call_vec (orig_fn, orig_args);
1978 release_tree_vector (orig_args);
1981 object = build_non_dependent_expr (object);
1984 result = build_new_method_call (object, fn, args, NULL_TREE,
1986 ? LOOKUP_NONVIRTUAL : 0),
1990 else if (is_overloaded_fn (fn))
1992 /* If the function is an overloaded builtin, resolve it. */
1993 if (TREE_CODE (fn) == FUNCTION_DECL
1994 && (DECL_BUILT_IN_CLASS (fn) == BUILT_IN_NORMAL
1995 || DECL_BUILT_IN_CLASS (fn) == BUILT_IN_MD))
1996 result = resolve_overloaded_builtin (input_location, fn, *args);
1999 /* A call to a namespace-scope function. */
2000 result = build_new_function_call (fn, args, koenig_p, complain);
2002 else if (TREE_CODE (fn) == PSEUDO_DTOR_EXPR)
2004 if (!VEC_empty (tree, *args))
2005 error ("arguments to destructor are not allowed");
2006 /* Mark the pseudo-destructor call as having side-effects so
2007 that we do not issue warnings about its use. */
2008 result = build1 (NOP_EXPR,
2010 TREE_OPERAND (fn, 0));
2011 TREE_SIDE_EFFECTS (result) = 1;
2013 else if (CLASS_TYPE_P (TREE_TYPE (fn)))
2014 /* If the "function" is really an object of class type, it might
2015 have an overloaded `operator ()'. */
2016 result = build_op_call (fn, args, complain);
2019 /* A call where the function is unknown. */
2020 result = cp_build_function_call_vec (fn, args, complain);
2022 if (processing_template_decl)
2024 result = build_call_vec (TREE_TYPE (result), orig_fn, orig_args);
2025 KOENIG_LOOKUP_P (result) = koenig_p;
2026 release_tree_vector (orig_args);
2032 /* Finish a call to a postfix increment or decrement or EXPR. (Which
2033 is indicated by CODE, which should be POSTINCREMENT_EXPR or
2034 POSTDECREMENT_EXPR.) */
2037 finish_increment_expr (tree expr, enum tree_code code)
2039 return build_x_unary_op (code, expr, tf_warning_or_error);
2042 /* Finish a use of `this'. Returns an expression for `this'. */
2045 finish_this_expr (void)
2049 if (current_class_ptr)
2051 result = current_class_ptr;
2053 else if (current_function_decl
2054 && DECL_STATIC_FUNCTION_P (current_function_decl))
2056 error ("%<this%> is unavailable for static member functions");
2057 result = error_mark_node;
2061 if (current_function_decl)
2062 error ("invalid use of %<this%> in non-member function");
2064 error ("invalid use of %<this%> at top level");
2065 result = error_mark_node;
2071 /* Finish a pseudo-destructor expression. If SCOPE is NULL, the
2072 expression was of the form `OBJECT.~DESTRUCTOR' where DESTRUCTOR is
2073 the TYPE for the type given. If SCOPE is non-NULL, the expression
2074 was of the form `OBJECT.SCOPE::~DESTRUCTOR'. */
2077 finish_pseudo_destructor_expr (tree object, tree scope, tree destructor)
2079 if (object == error_mark_node || destructor == error_mark_node)
2080 return error_mark_node;
2082 gcc_assert (TYPE_P (destructor));
2084 if (!processing_template_decl)
2086 if (scope == error_mark_node)
2088 error ("invalid qualifying scope in pseudo-destructor name");
2089 return error_mark_node;
2091 if (scope && TYPE_P (scope) && !check_dtor_name (scope, destructor))
2093 error ("qualified type %qT does not match destructor name ~%qT",
2095 return error_mark_node;
2099 /* [expr.pseudo] says both:
2101 The type designated by the pseudo-destructor-name shall be
2102 the same as the object type.
2106 The cv-unqualified versions of the object type and of the
2107 type designated by the pseudo-destructor-name shall be the
2110 We implement the more generous second sentence, since that is
2111 what most other compilers do. */
2112 if (!same_type_ignoring_top_level_qualifiers_p (TREE_TYPE (object),
2115 error ("%qE is not of type %qT", object, destructor);
2116 return error_mark_node;
2120 return build3 (PSEUDO_DTOR_EXPR, void_type_node, object, scope, destructor);
2123 /* Finish an expression of the form CODE EXPR. */
2126 finish_unary_op_expr (enum tree_code code, tree expr)
2128 tree result = build_x_unary_op (code, expr, tf_warning_or_error);
2129 /* Inside a template, build_x_unary_op does not fold the
2130 expression. So check whether the result is folded before
2131 setting TREE_NEGATED_INT. */
2132 if (code == NEGATE_EXPR && TREE_CODE (expr) == INTEGER_CST
2133 && TREE_CODE (result) == INTEGER_CST
2134 && !TYPE_UNSIGNED (TREE_TYPE (result))
2135 && INT_CST_LT (result, integer_zero_node))
2137 /* RESULT may be a cached INTEGER_CST, so we must copy it before
2138 setting TREE_NEGATED_INT. */
2139 result = copy_node (result);
2140 TREE_NEGATED_INT (result) = 1;
2142 if (TREE_OVERFLOW_P (result) && !TREE_OVERFLOW_P (expr))
2143 overflow_warning (input_location, result);
2148 /* Finish a compound-literal expression. TYPE is the type to which
2149 the CONSTRUCTOR in COMPOUND_LITERAL is being cast. */
2152 finish_compound_literal (tree type, tree compound_literal)
2154 if (type == error_mark_node)
2155 return error_mark_node;
2157 if (!TYPE_OBJ_P (type))
2159 error ("compound literal of non-object type %qT", type);
2160 return error_mark_node;
2163 if (processing_template_decl)
2165 TREE_TYPE (compound_literal) = type;
2166 /* Mark the expression as a compound literal. */
2167 TREE_HAS_CONSTRUCTOR (compound_literal) = 1;
2168 return compound_literal;
2171 type = complete_type (type);
2173 if (TYPE_NON_AGGREGATE_CLASS (type))
2175 /* Trying to deal with a CONSTRUCTOR instead of a TREE_LIST
2176 everywhere that deals with function arguments would be a pain, so
2177 just wrap it in a TREE_LIST. The parser set a flag so we know
2178 that it came from T{} rather than T({}). */
2179 CONSTRUCTOR_IS_DIRECT_INIT (compound_literal) = 1;
2180 compound_literal = build_tree_list (NULL_TREE, compound_literal);
2181 return build_functional_cast (type, compound_literal, tf_error);
2184 if (TREE_CODE (type) == ARRAY_TYPE
2185 && check_array_initializer (NULL_TREE, type, compound_literal))
2186 return error_mark_node;
2187 compound_literal = reshape_init (type, compound_literal);
2188 if (TREE_CODE (type) == ARRAY_TYPE)
2189 cp_complete_array_type (&type, compound_literal, false);
2190 compound_literal = digest_init (type, compound_literal);
2191 if ((!at_function_scope_p () || cp_type_readonly (type))
2192 && initializer_constant_valid_p (compound_literal, type))
2194 tree decl = create_temporary_var (type);
2195 DECL_INITIAL (decl) = compound_literal;
2196 TREE_STATIC (decl) = 1;
2197 decl = pushdecl_top_level (decl);
2198 DECL_NAME (decl) = make_anon_name ();
2199 SET_DECL_ASSEMBLER_NAME (decl, DECL_NAME (decl));
2203 return get_target_expr (compound_literal);
2206 /* Return the declaration for the function-name variable indicated by
2210 finish_fname (tree id)
2214 decl = fname_decl (input_location, C_RID_CODE (id), id);
2215 if (processing_template_decl)
2216 decl = DECL_NAME (decl);
2220 /* Finish a translation unit. */
2223 finish_translation_unit (void)
2225 /* In case there were missing closebraces,
2226 get us back to the global binding level. */
2228 while (current_namespace != global_namespace)
2231 /* Do file scope __FUNCTION__ et al. */
2232 finish_fname_decls ();
2235 /* Finish a template type parameter, specified as AGGR IDENTIFIER.
2236 Returns the parameter. */
2239 finish_template_type_parm (tree aggr, tree identifier)
2241 if (aggr != class_type_node)
2243 permerror (input_location, "template type parameters must use the keyword %<class%> or %<typename%>");
2244 aggr = class_type_node;
2247 return build_tree_list (aggr, identifier);
2250 /* Finish a template template parameter, specified as AGGR IDENTIFIER.
2251 Returns the parameter. */
2254 finish_template_template_parm (tree aggr, tree identifier)
2256 tree decl = build_decl (input_location,
2257 TYPE_DECL, identifier, NULL_TREE);
2258 tree tmpl = build_lang_decl (TEMPLATE_DECL, identifier, NULL_TREE);
2259 DECL_TEMPLATE_PARMS (tmpl) = current_template_parms;
2260 DECL_TEMPLATE_RESULT (tmpl) = decl;
2261 DECL_ARTIFICIAL (decl) = 1;
2262 end_template_decl ();
2264 gcc_assert (DECL_TEMPLATE_PARMS (tmpl));
2266 check_default_tmpl_args (decl, DECL_TEMPLATE_PARMS (tmpl),
2267 /*is_primary=*/true, /*is_partial=*/false,
2270 return finish_template_type_parm (aggr, tmpl);
2273 /* ARGUMENT is the default-argument value for a template template
2274 parameter. If ARGUMENT is invalid, issue error messages and return
2275 the ERROR_MARK_NODE. Otherwise, ARGUMENT itself is returned. */
2278 check_template_template_default_arg (tree argument)
2280 if (TREE_CODE (argument) != TEMPLATE_DECL
2281 && TREE_CODE (argument) != TEMPLATE_TEMPLATE_PARM
2282 && TREE_CODE (argument) != UNBOUND_CLASS_TEMPLATE)
2284 if (TREE_CODE (argument) == TYPE_DECL)
2285 error ("invalid use of type %qT as a default value for a template "
2286 "template-parameter", TREE_TYPE (argument));
2288 error ("invalid default argument for a template template parameter");
2289 return error_mark_node;
2295 /* Begin a class definition, as indicated by T. */
2298 begin_class_definition (tree t, tree attributes)
2300 if (error_operand_p (t) || error_operand_p (TYPE_MAIN_DECL (t)))
2301 return error_mark_node;
2303 if (processing_template_parmlist)
2305 error ("definition of %q#T inside template parameter list", t);
2306 return error_mark_node;
2308 /* A non-implicit typename comes from code like:
2310 template <typename T> struct A {
2311 template <typename U> struct A<T>::B ...
2313 This is erroneous. */
2314 else if (TREE_CODE (t) == TYPENAME_TYPE)
2316 error ("invalid definition of qualified type %qT", t);
2317 t = error_mark_node;
2320 if (t == error_mark_node || ! MAYBE_CLASS_TYPE_P (t))
2322 t = make_class_type (RECORD_TYPE);
2323 pushtag (make_anon_name (), t, /*tag_scope=*/ts_current);
2326 /* Update the location of the decl. */
2327 DECL_SOURCE_LOCATION (TYPE_NAME (t)) = input_location;
2329 if (TYPE_BEING_DEFINED (t))
2331 t = make_class_type (TREE_CODE (t));
2332 pushtag (TYPE_IDENTIFIER (t), t, /*tag_scope=*/ts_current);
2334 maybe_process_partial_specialization (t);
2336 TYPE_BEING_DEFINED (t) = 1;
2338 cplus_decl_attributes (&t, attributes, (int) ATTR_FLAG_TYPE_IN_PLACE);
2340 if (flag_pack_struct)
2343 TYPE_PACKED (t) = 1;
2344 /* Even though the type is being defined for the first time
2345 here, there might have been a forward declaration, so there
2346 might be cv-qualified variants of T. */
2347 for (v = TYPE_NEXT_VARIANT (t); v; v = TYPE_NEXT_VARIANT (v))
2348 TYPE_PACKED (v) = 1;
2350 /* Reset the interface data, at the earliest possible
2351 moment, as it might have been set via a class foo;
2353 if (! TYPE_ANONYMOUS_P (t))
2355 struct c_fileinfo *finfo = get_fileinfo (input_filename);
2356 CLASSTYPE_INTERFACE_ONLY (t) = finfo->interface_only;
2357 SET_CLASSTYPE_INTERFACE_UNKNOWN_X
2358 (t, finfo->interface_unknown);
2360 reset_specialization();
2362 /* Make a declaration for this class in its own scope. */
2363 build_self_reference ();
2368 /* Finish the member declaration given by DECL. */
2371 finish_member_declaration (tree decl)
2373 if (decl == error_mark_node || decl == NULL_TREE)
2376 if (decl == void_type_node)
2377 /* The COMPONENT was a friend, not a member, and so there's
2378 nothing for us to do. */
2381 /* We should see only one DECL at a time. */
2382 gcc_assert (TREE_CHAIN (decl) == NULL_TREE);
2384 /* Set up access control for DECL. */
2386 = (current_access_specifier == access_private_node);
2387 TREE_PROTECTED (decl)
2388 = (current_access_specifier == access_protected_node);
2389 if (TREE_CODE (decl) == TEMPLATE_DECL)
2391 TREE_PRIVATE (DECL_TEMPLATE_RESULT (decl)) = TREE_PRIVATE (decl);
2392 TREE_PROTECTED (DECL_TEMPLATE_RESULT (decl)) = TREE_PROTECTED (decl);
2395 /* Mark the DECL as a member of the current class. */
2396 DECL_CONTEXT (decl) = current_class_type;
2398 /* Check for bare parameter packs in the member variable declaration. */
2399 if (TREE_CODE (decl) == FIELD_DECL)
2401 if (check_for_bare_parameter_packs (TREE_TYPE (decl)))
2402 TREE_TYPE (decl) = error_mark_node;
2403 if (check_for_bare_parameter_packs (DECL_ATTRIBUTES (decl)))
2404 DECL_ATTRIBUTES (decl) = NULL_TREE;
2409 A C language linkage is ignored for the names of class members
2410 and the member function type of class member functions. */
2411 if (DECL_LANG_SPECIFIC (decl) && DECL_LANGUAGE (decl) == lang_c)
2412 SET_DECL_LANGUAGE (decl, lang_cplusplus);
2414 /* Put functions on the TYPE_METHODS list and everything else on the
2415 TYPE_FIELDS list. Note that these are built up in reverse order.
2416 We reverse them (to obtain declaration order) in finish_struct. */
2417 if (TREE_CODE (decl) == FUNCTION_DECL
2418 || DECL_FUNCTION_TEMPLATE_P (decl))
2420 /* We also need to add this function to the
2421 CLASSTYPE_METHOD_VEC. */
2422 if (add_method (current_class_type, decl, NULL_TREE))
2424 TREE_CHAIN (decl) = TYPE_METHODS (current_class_type);
2425 TYPE_METHODS (current_class_type) = decl;
2427 maybe_add_class_template_decl_list (current_class_type, decl,
2431 /* Enter the DECL into the scope of the class. */
2432 else if ((TREE_CODE (decl) == USING_DECL && !DECL_DEPENDENT_P (decl))
2433 || pushdecl_class_level (decl))
2435 /* All TYPE_DECLs go at the end of TYPE_FIELDS. Ordinary fields
2436 go at the beginning. The reason is that lookup_field_1
2437 searches the list in order, and we want a field name to
2438 override a type name so that the "struct stat hack" will
2439 work. In particular:
2441 struct S { enum E { }; int E } s;
2444 is valid. In addition, the FIELD_DECLs must be maintained in
2445 declaration order so that class layout works as expected.
2446 However, we don't need that order until class layout, so we
2447 save a little time by putting FIELD_DECLs on in reverse order
2448 here, and then reversing them in finish_struct_1. (We could
2449 also keep a pointer to the correct insertion points in the
2452 if (TREE_CODE (decl) == TYPE_DECL)
2453 TYPE_FIELDS (current_class_type)
2454 = chainon (TYPE_FIELDS (current_class_type), decl);
2457 TREE_CHAIN (decl) = TYPE_FIELDS (current_class_type);
2458 TYPE_FIELDS (current_class_type) = decl;
2461 maybe_add_class_template_decl_list (current_class_type, decl,
2466 note_decl_for_pch (decl);
2469 /* DECL has been declared while we are building a PCH file. Perform
2470 actions that we might normally undertake lazily, but which can be
2471 performed now so that they do not have to be performed in
2472 translation units which include the PCH file. */
2475 note_decl_for_pch (tree decl)
2477 gcc_assert (pch_file);
2479 /* There's a good chance that we'll have to mangle names at some
2480 point, even if only for emission in debugging information. */
2481 if ((TREE_CODE (decl) == VAR_DECL
2482 || TREE_CODE (decl) == FUNCTION_DECL)
2483 && !processing_template_decl)
2487 /* Finish processing a complete template declaration. The PARMS are
2488 the template parameters. */
2491 finish_template_decl (tree parms)
2494 end_template_decl ();
2496 end_specialization ();
2499 /* Finish processing a template-id (which names a type) of the form
2500 NAME < ARGS >. Return the TYPE_DECL for the type named by the
2501 template-id. If ENTERING_SCOPE is nonzero we are about to enter
2502 the scope of template-id indicated. */
2505 finish_template_type (tree name, tree args, int entering_scope)
2509 decl = lookup_template_class (name, args,
2510 NULL_TREE, NULL_TREE, entering_scope,
2511 tf_warning_or_error | tf_user);
2512 if (decl != error_mark_node)
2513 decl = TYPE_STUB_DECL (decl);
2518 /* Finish processing a BASE_CLASS with the indicated ACCESS_SPECIFIER.
2519 Return a TREE_LIST containing the ACCESS_SPECIFIER and the
2520 BASE_CLASS, or NULL_TREE if an error occurred. The
2521 ACCESS_SPECIFIER is one of
2522 access_{default,public,protected_private}_node. For a virtual base
2523 we set TREE_TYPE. */
2526 finish_base_specifier (tree base, tree access, bool virtual_p)
2530 if (base == error_mark_node)
2532 error ("invalid base-class specification");
2535 else if (! MAYBE_CLASS_TYPE_P (base))
2537 error ("%qT is not a class type", base);
2542 if (cp_type_quals (base) != 0)
2544 error ("base class %qT has cv qualifiers", base);
2545 base = TYPE_MAIN_VARIANT (base);
2547 result = build_tree_list (access, base);
2549 TREE_TYPE (result) = integer_type_node;
2555 /* Issue a diagnostic that NAME cannot be found in SCOPE. DECL is
2556 what we found when we tried to do the lookup.
2557 LOCATION is the location of the NAME identifier;
2558 The location is used in the error message*/
2561 qualified_name_lookup_error (tree scope, tree name,
2562 tree decl, location_t location)
2564 if (scope == error_mark_node)
2565 ; /* We already complained. */
2566 else if (TYPE_P (scope))
2568 if (!COMPLETE_TYPE_P (scope))
2569 error_at (location, "incomplete type %qT used in nested name specifier",
2571 else if (TREE_CODE (decl) == TREE_LIST)
2573 error_at (location, "reference to %<%T::%D%> is ambiguous",
2575 print_candidates (decl);
2578 error_at (location, "%qD is not a member of %qT", name, scope);
2580 else if (scope != global_namespace)
2581 error_at (location, "%qD is not a member of %qD", name, scope);
2583 error_at (location, "%<::%D%> has not been declared", name);
2586 /* If FNS is a member function, a set of member functions, or a
2587 template-id referring to one or more member functions, return a
2588 BASELINK for FNS, incorporating the current access context.
2589 Otherwise, return FNS unchanged. */
2592 baselink_for_fns (tree fns)
2597 if (BASELINK_P (fns)
2598 || error_operand_p (fns))
2602 if (TREE_CODE (fn) == TEMPLATE_ID_EXPR)
2603 fn = TREE_OPERAND (fn, 0);
2604 fn = get_first_fn (fn);
2605 if (!DECL_FUNCTION_MEMBER_P (fn))
2608 cl = currently_open_derived_class (DECL_CONTEXT (fn));
2610 cl = DECL_CONTEXT (fn);
2611 cl = TYPE_BINFO (cl);
2612 return build_baselink (cl, cl, fns, /*optype=*/NULL_TREE);
2615 /* ID_EXPRESSION is a representation of parsed, but unprocessed,
2616 id-expression. (See cp_parser_id_expression for details.) SCOPE,
2617 if non-NULL, is the type or namespace used to explicitly qualify
2618 ID_EXPRESSION. DECL is the entity to which that name has been
2621 *CONSTANT_EXPRESSION_P is true if we are presently parsing a
2622 constant-expression. In that case, *NON_CONSTANT_EXPRESSION_P will
2623 be set to true if this expression isn't permitted in a
2624 constant-expression, but it is otherwise not set by this function.
2625 *ALLOW_NON_CONSTANT_EXPRESSION_P is true if we are parsing a
2626 constant-expression, but a non-constant expression is also
2629 DONE is true if this expression is a complete postfix-expression;
2630 it is false if this expression is followed by '->', '[', '(', etc.
2631 ADDRESS_P is true iff this expression is the operand of '&'.
2632 TEMPLATE_P is true iff the qualified-id was of the form
2633 "A::template B". TEMPLATE_ARG_P is true iff this qualified name
2634 appears as a template argument.
2636 If an error occurs, and it is the kind of error that might cause
2637 the parser to abort a tentative parse, *ERROR_MSG is filled in. It
2638 is the caller's responsibility to issue the message. *ERROR_MSG
2639 will be a string with static storage duration, so the caller need
2642 Return an expression for the entity, after issuing appropriate
2643 diagnostics. This function is also responsible for transforming a
2644 reference to a non-static member into a COMPONENT_REF that makes
2645 the use of "this" explicit.
2647 Upon return, *IDK will be filled in appropriately. */
2649 finish_id_expression (tree id_expression,
2653 bool integral_constant_expression_p,
2654 bool allow_non_integral_constant_expression_p,
2655 bool *non_integral_constant_expression_p,
2659 bool template_arg_p,
2660 const char **error_msg,
2661 location_t location)
2663 /* Initialize the output parameters. */
2664 *idk = CP_ID_KIND_NONE;
2667 if (id_expression == error_mark_node)
2668 return error_mark_node;
2669 /* If we have a template-id, then no further lookup is
2670 required. If the template-id was for a template-class, we
2671 will sometimes have a TYPE_DECL at this point. */
2672 else if (TREE_CODE (decl) == TEMPLATE_ID_EXPR
2673 || TREE_CODE (decl) == TYPE_DECL)
2675 /* Look up the name. */
2678 if (decl == error_mark_node)
2680 /* Name lookup failed. */
2683 || (!dependent_type_p (scope)
2684 && !(TREE_CODE (id_expression) == IDENTIFIER_NODE
2685 && IDENTIFIER_TYPENAME_P (id_expression)
2686 && dependent_type_p (TREE_TYPE (id_expression))))))
2688 /* If the qualifying type is non-dependent (and the name
2689 does not name a conversion operator to a dependent
2690 type), issue an error. */
2691 qualified_name_lookup_error (scope, id_expression, decl, location);
2692 return error_mark_node;
2696 /* It may be resolved via Koenig lookup. */
2697 *idk = CP_ID_KIND_UNQUALIFIED;
2698 return id_expression;
2701 decl = id_expression;
2703 /* If DECL is a variable that would be out of scope under
2704 ANSI/ISO rules, but in scope in the ARM, name lookup
2705 will succeed. Issue a diagnostic here. */
2707 decl = check_for_out_of_scope_variable (decl);
2709 /* Remember that the name was used in the definition of
2710 the current class so that we can check later to see if
2711 the meaning would have been different after the class
2712 was entirely defined. */
2713 if (!scope && decl != error_mark_node)
2714 maybe_note_name_used_in_class (id_expression, decl);
2716 /* Disallow uses of local variables from containing functions. */
2717 if (TREE_CODE (decl) == VAR_DECL || TREE_CODE (decl) == PARM_DECL)
2719 tree context = decl_function_context (decl);
2720 if (context != NULL_TREE && context != current_function_decl
2721 && ! TREE_STATIC (decl))
2723 error (TREE_CODE (decl) == VAR_DECL
2724 ? "use of %<auto%> variable from containing function"
2725 : "use of parameter from containing function");
2726 error (" %q+#D declared here", decl);
2727 return error_mark_node;
2732 /* If we didn't find anything, or what we found was a type,
2733 then this wasn't really an id-expression. */
2734 if (TREE_CODE (decl) == TEMPLATE_DECL
2735 && !DECL_FUNCTION_TEMPLATE_P (decl))
2737 *error_msg = "missing template arguments";
2738 return error_mark_node;
2740 else if (TREE_CODE (decl) == TYPE_DECL
2741 || TREE_CODE (decl) == NAMESPACE_DECL)
2743 *error_msg = "expected primary-expression";
2744 return error_mark_node;
2747 /* If the name resolved to a template parameter, there is no
2748 need to look it up again later. */
2749 if ((TREE_CODE (decl) == CONST_DECL && DECL_TEMPLATE_PARM_P (decl))
2750 || TREE_CODE (decl) == TEMPLATE_PARM_INDEX)
2754 *idk = CP_ID_KIND_NONE;
2755 if (TREE_CODE (decl) == TEMPLATE_PARM_INDEX)
2756 decl = TEMPLATE_PARM_DECL (decl);
2757 r = convert_from_reference (DECL_INITIAL (decl));
2759 if (integral_constant_expression_p
2760 && !dependent_type_p (TREE_TYPE (decl))
2761 && !(INTEGRAL_OR_ENUMERATION_TYPE_P (TREE_TYPE (r))))
2763 if (!allow_non_integral_constant_expression_p)
2764 error ("template parameter %qD of type %qT is not allowed in "
2765 "an integral constant expression because it is not of "
2766 "integral or enumeration type", decl, TREE_TYPE (decl));
2767 *non_integral_constant_expression_p = true;
2771 /* Similarly, we resolve enumeration constants to their
2772 underlying values. */
2773 else if (TREE_CODE (decl) == CONST_DECL)
2775 *idk = CP_ID_KIND_NONE;
2776 if (!processing_template_decl)
2778 used_types_insert (TREE_TYPE (decl));
2779 return DECL_INITIAL (decl);
2787 /* If the declaration was explicitly qualified indicate
2788 that. The semantics of `A::f(3)' are different than
2789 `f(3)' if `f' is virtual. */
2791 ? CP_ID_KIND_QUALIFIED
2792 : (TREE_CODE (decl) == TEMPLATE_ID_EXPR
2793 ? CP_ID_KIND_TEMPLATE_ID
2794 : CP_ID_KIND_UNQUALIFIED));
2799 An id-expression is type-dependent if it contains an
2800 identifier that was declared with a dependent type.
2802 The standard is not very specific about an id-expression that
2803 names a set of overloaded functions. What if some of them
2804 have dependent types and some of them do not? Presumably,
2805 such a name should be treated as a dependent name. */
2806 /* Assume the name is not dependent. */
2807 dependent_p = false;
2808 if (!processing_template_decl)
2809 /* No names are dependent outside a template. */
2811 /* A template-id where the name of the template was not resolved
2812 is definitely dependent. */
2813 else if (TREE_CODE (decl) == TEMPLATE_ID_EXPR
2814 && (TREE_CODE (TREE_OPERAND (decl, 0))
2815 == IDENTIFIER_NODE))
2817 /* For anything except an overloaded function, just check its
2819 else if (!is_overloaded_fn (decl))
2821 = dependent_type_p (TREE_TYPE (decl));
2822 /* For a set of overloaded functions, check each of the
2828 if (BASELINK_P (fns))
2829 fns = BASELINK_FUNCTIONS (fns);
2831 /* For a template-id, check to see if the template
2832 arguments are dependent. */
2833 if (TREE_CODE (fns) == TEMPLATE_ID_EXPR)
2835 tree args = TREE_OPERAND (fns, 1);
2836 dependent_p = any_dependent_template_arguments_p (args);
2837 /* The functions are those referred to by the
2839 fns = TREE_OPERAND (fns, 0);
2842 /* If there are no dependent template arguments, go through
2843 the overloaded functions. */
2844 while (fns && !dependent_p)
2846 tree fn = OVL_CURRENT (fns);
2848 /* Member functions of dependent classes are
2850 if (TREE_CODE (fn) == FUNCTION_DECL
2851 && type_dependent_expression_p (fn))
2853 else if (TREE_CODE (fn) == TEMPLATE_DECL
2854 && dependent_template_p (fn))
2857 fns = OVL_NEXT (fns);
2861 /* If the name was dependent on a template parameter, we will
2862 resolve the name at instantiation time. */
2865 /* Create a SCOPE_REF for qualified names, if the scope is
2871 if (address_p && done)
2872 decl = finish_qualified_id_expr (scope, decl,
2878 tree type = NULL_TREE;
2879 if (DECL_P (decl) && !dependent_scope_p (scope))
2880 type = TREE_TYPE (decl);
2881 decl = build_qualified_name (type,
2887 if (TREE_TYPE (decl))
2888 decl = convert_from_reference (decl);
2891 /* A TEMPLATE_ID already contains all the information we
2893 if (TREE_CODE (id_expression) == TEMPLATE_ID_EXPR)
2894 return id_expression;
2895 *idk = CP_ID_KIND_UNQUALIFIED_DEPENDENT;
2896 /* If we found a variable, then name lookup during the
2897 instantiation will always resolve to the same VAR_DECL
2898 (or an instantiation thereof). */
2899 if (TREE_CODE (decl) == VAR_DECL
2900 || TREE_CODE (decl) == PARM_DECL)
2901 return convert_from_reference (decl);
2902 /* The same is true for FIELD_DECL, but we also need to
2903 make sure that the syntax is correct. */
2904 else if (TREE_CODE (decl) == FIELD_DECL)
2906 /* Since SCOPE is NULL here, this is an unqualified name.
2907 Access checking has been performed during name lookup
2908 already. Turn off checking to avoid duplicate errors. */
2909 push_deferring_access_checks (dk_no_check);
2910 decl = finish_non_static_data_member
2911 (decl, current_class_ref,
2912 /*qualifying_scope=*/NULL_TREE);
2913 pop_deferring_access_checks ();
2916 return id_expression;
2919 /* Only certain kinds of names are allowed in constant
2920 expression. Enumerators and template parameters have already
2921 been handled above. */
2922 if (integral_constant_expression_p
2923 && ! DECL_INTEGRAL_CONSTANT_VAR_P (decl)
2924 && ! builtin_valid_in_constant_expr_p (decl))
2926 if (!allow_non_integral_constant_expression_p)
2928 error ("%qD cannot appear in a constant-expression", decl);
2929 return error_mark_node;
2931 *non_integral_constant_expression_p = true;
2934 if (TREE_CODE (decl) == NAMESPACE_DECL)
2936 error ("use of namespace %qD as expression", decl);
2937 return error_mark_node;
2939 else if (DECL_CLASS_TEMPLATE_P (decl))
2941 error ("use of class template %qT as expression", decl);
2942 return error_mark_node;
2944 else if (TREE_CODE (decl) == TREE_LIST)
2946 /* Ambiguous reference to base members. */
2947 error ("request for member %qD is ambiguous in "
2948 "multiple inheritance lattice", id_expression);
2949 print_candidates (decl);
2950 return error_mark_node;
2953 /* Mark variable-like entities as used. Functions are similarly
2954 marked either below or after overload resolution. */
2955 if (TREE_CODE (decl) == VAR_DECL
2956 || TREE_CODE (decl) == PARM_DECL
2957 || TREE_CODE (decl) == RESULT_DECL)
2962 decl = (adjust_result_of_qualified_name_lookup
2963 (decl, scope, current_class_type));
2965 if (TREE_CODE (decl) == FUNCTION_DECL)
2968 if (TREE_CODE (decl) == FIELD_DECL || BASELINK_P (decl))
2969 decl = finish_qualified_id_expr (scope,
2977 tree r = convert_from_reference (decl);
2979 if (processing_template_decl && TYPE_P (scope))
2980 r = build_qualified_name (TREE_TYPE (r),
2986 else if (TREE_CODE (decl) == FIELD_DECL)
2988 /* Since SCOPE is NULL here, this is an unqualified name.
2989 Access checking has been performed during name lookup
2990 already. Turn off checking to avoid duplicate errors. */
2991 push_deferring_access_checks (dk_no_check);
2992 decl = finish_non_static_data_member (decl, current_class_ref,
2993 /*qualifying_scope=*/NULL_TREE);
2994 pop_deferring_access_checks ();
2996 else if (is_overloaded_fn (decl))
3001 if (TREE_CODE (first_fn) == TEMPLATE_ID_EXPR)
3002 first_fn = TREE_OPERAND (first_fn, 0);
3003 first_fn = get_first_fn (first_fn);
3004 if (TREE_CODE (first_fn) == TEMPLATE_DECL)
3005 first_fn = DECL_TEMPLATE_RESULT (first_fn);
3007 if (!really_overloaded_fn (decl))
3008 mark_used (first_fn);
3011 && TREE_CODE (first_fn) == FUNCTION_DECL
3012 && DECL_FUNCTION_MEMBER_P (first_fn)
3013 && !shared_member_p (decl))
3015 /* A set of member functions. */
3016 decl = maybe_dummy_object (DECL_CONTEXT (first_fn), 0);
3017 return finish_class_member_access_expr (decl, id_expression,
3018 /*template_p=*/false,
3019 tf_warning_or_error);
3022 decl = baselink_for_fns (decl);
3026 if (DECL_P (decl) && DECL_NONLOCAL (decl)
3027 && DECL_CLASS_SCOPE_P (decl))
3029 tree context = context_for_name_lookup (decl);
3030 if (context != current_class_type)
3032 tree path = currently_open_derived_class (context);
3033 perform_or_defer_access_check (TYPE_BINFO (path),
3038 decl = convert_from_reference (decl);
3042 if (TREE_DEPRECATED (decl))
3043 warn_deprecated_use (decl, NULL_TREE);
3048 /* Implement the __typeof keyword: Return the type of EXPR, suitable for
3049 use as a type-specifier. */
3052 finish_typeof (tree expr)
3056 if (type_dependent_expression_p (expr))
3058 type = cxx_make_type (TYPEOF_TYPE);
3059 TYPEOF_TYPE_EXPR (type) = expr;
3060 SET_TYPE_STRUCTURAL_EQUALITY (type);
3065 type = unlowered_expr_type (expr);
3067 if (!type || type == unknown_type_node)
3069 error ("type of %qE is unknown", expr);
3070 return error_mark_node;
3076 /* Perform C++-specific checks for __builtin_offsetof before calling
3080 finish_offsetof (tree expr)
3082 if (TREE_CODE (expr) == PSEUDO_DTOR_EXPR)
3084 error ("cannot apply %<offsetof%> to destructor %<~%T%>",
3085 TREE_OPERAND (expr, 2));
3086 return error_mark_node;
3088 if (TREE_CODE (TREE_TYPE (expr)) == FUNCTION_TYPE
3089 || TREE_CODE (TREE_TYPE (expr)) == METHOD_TYPE
3090 || TREE_CODE (TREE_TYPE (expr)) == UNKNOWN_TYPE)
3092 if (TREE_CODE (expr) == COMPONENT_REF
3093 || TREE_CODE (expr) == COMPOUND_EXPR)
3094 expr = TREE_OPERAND (expr, 1);
3095 error ("cannot apply %<offsetof%> to member function %qD", expr);
3096 return error_mark_node;
3098 if (TREE_CODE (expr) == INDIRECT_REF && REFERENCE_REF_P (expr))
3099 expr = TREE_OPERAND (expr, 0);
3100 return fold_offsetof (expr, NULL_TREE);
3103 /* Replace the AGGR_INIT_EXPR at *TP with an equivalent CALL_EXPR. This
3104 function is broken out from the above for the benefit of the tree-ssa
3108 simplify_aggr_init_expr (tree *tp)
3110 tree aggr_init_expr = *tp;
3112 /* Form an appropriate CALL_EXPR. */
3113 tree fn = AGGR_INIT_EXPR_FN (aggr_init_expr);
3114 tree slot = AGGR_INIT_EXPR_SLOT (aggr_init_expr);
3115 tree type = TREE_TYPE (slot);
3118 enum style_t { ctor, arg, pcc } style;
3120 if (AGGR_INIT_VIA_CTOR_P (aggr_init_expr))
3122 #ifdef PCC_STATIC_STRUCT_RETURN
3128 gcc_assert (TREE_ADDRESSABLE (type));
3132 call_expr = build_call_array_loc (input_location,
3133 TREE_TYPE (TREE_TYPE (TREE_TYPE (fn))),
3135 aggr_init_expr_nargs (aggr_init_expr),
3136 AGGR_INIT_EXPR_ARGP (aggr_init_expr));
3140 /* Replace the first argument to the ctor with the address of the
3142 cxx_mark_addressable (slot);
3143 CALL_EXPR_ARG (call_expr, 0) =
3144 build1 (ADDR_EXPR, build_pointer_type (type), slot);
3146 else if (style == arg)
3148 /* Just mark it addressable here, and leave the rest to
3149 expand_call{,_inline}. */
3150 cxx_mark_addressable (slot);
3151 CALL_EXPR_RETURN_SLOT_OPT (call_expr) = true;
3152 call_expr = build2 (MODIFY_EXPR, TREE_TYPE (call_expr), slot, call_expr);
3154 else if (style == pcc)
3156 /* If we're using the non-reentrant PCC calling convention, then we
3157 need to copy the returned value out of the static buffer into the
3159 push_deferring_access_checks (dk_no_check);
3160 call_expr = build_aggr_init (slot, call_expr,
3161 DIRECT_BIND | LOOKUP_ONLYCONVERTING,
3162 tf_warning_or_error);
3163 pop_deferring_access_checks ();
3164 call_expr = build2 (COMPOUND_EXPR, TREE_TYPE (slot), call_expr, slot);
3167 if (AGGR_INIT_ZERO_FIRST (aggr_init_expr))
3169 tree init = build_zero_init (type, NULL_TREE,
3170 /*static_storage_p=*/false);
3171 init = build2 (INIT_EXPR, void_type_node, slot, init);
3172 call_expr = build2 (COMPOUND_EXPR, TREE_TYPE (call_expr),
3179 /* Emit all thunks to FN that should be emitted when FN is emitted. */
3182 emit_associated_thunks (tree fn)
3184 /* When we use vcall offsets, we emit thunks with the virtual
3185 functions to which they thunk. The whole point of vcall offsets
3186 is so that you can know statically the entire set of thunks that
3187 will ever be needed for a given virtual function, thereby
3188 enabling you to output all the thunks with the function itself. */
3189 if (DECL_VIRTUAL_P (fn))
3193 for (thunk = DECL_THUNKS (fn); thunk; thunk = TREE_CHAIN (thunk))
3195 if (!THUNK_ALIAS (thunk))
3197 use_thunk (thunk, /*emit_p=*/1);
3198 if (DECL_RESULT_THUNK_P (thunk))
3202 for (probe = DECL_THUNKS (thunk);
3203 probe; probe = TREE_CHAIN (probe))
3204 use_thunk (probe, /*emit_p=*/1);
3208 gcc_assert (!DECL_THUNKS (thunk));
3213 /* Generate RTL for FN. */
3216 expand_or_defer_fn (tree fn)
3218 /* When the parser calls us after finishing the body of a template
3219 function, we don't really want to expand the body. */
3220 if (processing_template_decl)
3222 /* Normally, collection only occurs in rest_of_compilation. So,
3223 if we don't collect here, we never collect junk generated
3224 during the processing of templates until we hit a
3225 non-template function. It's not safe to do this inside a
3226 nested class, though, as the parser may have local state that
3227 is not a GC root. */
3228 if (!function_depth)
3233 gcc_assert (DECL_SAVED_TREE (fn));
3235 /* If this is a constructor or destructor body, we have to clone
3237 if (maybe_clone_body (fn))
3239 /* We don't want to process FN again, so pretend we've written
3240 it out, even though we haven't. */
3241 TREE_ASM_WRITTEN (fn) = 1;
3242 DECL_SAVED_TREE (fn) = NULL_TREE;
3246 /* We make a decision about linkage for these functions at the end
3247 of the compilation. Until that point, we do not want the back
3248 end to output them -- but we do want it to see the bodies of
3249 these functions so that it can inline them as appropriate. */
3250 if (DECL_DECLARED_INLINE_P (fn) || DECL_IMPLICIT_INSTANTIATION (fn))
3252 if (DECL_INTERFACE_KNOWN (fn))
3253 /* We've already made a decision as to how this function will
3257 DECL_EXTERNAL (fn) = 1;
3258 DECL_NOT_REALLY_EXTERN (fn) = 1;
3259 note_vague_linkage_fn (fn);
3260 /* A non-template inline function with external linkage will
3261 always be COMDAT. As we must eventually determine the
3262 linkage of all functions, and as that causes writes to
3263 the data mapped in from the PCH file, it's advantageous
3264 to mark the functions at this point. */
3265 if (!DECL_IMPLICIT_INSTANTIATION (fn))
3267 /* This function must have external linkage, as
3268 otherwise DECL_INTERFACE_KNOWN would have been
3270 gcc_assert (TREE_PUBLIC (fn));
3271 comdat_linkage (fn);
3272 DECL_INTERFACE_KNOWN (fn) = 1;
3276 import_export_decl (fn);
3278 /* If the user wants us to keep all inline functions, then mark
3279 this function as needed so that finish_file will make sure to
3280 output it later. Similarly, all dllexport'd functions must
3281 be emitted; there may be callers in other DLLs. */
3282 if ((flag_keep_inline_functions && DECL_DECLARED_INLINE_P (fn))
3283 || lookup_attribute ("dllexport", DECL_ATTRIBUTES (fn)))
3287 /* There's no reason to do any of the work here if we're only doing
3288 semantic analysis; this code just generates RTL. */
3289 if (flag_syntax_only)
3294 /* Expand or defer, at the whim of the compilation unit manager. */
3295 cgraph_finalize_function (fn, function_depth > 1);
3307 /* Helper function for walk_tree, used by finalize_nrv below. */
3310 finalize_nrv_r (tree* tp, int* walk_subtrees, void* data)
3312 struct nrv_data *dp = (struct nrv_data *)data;
3315 /* No need to walk into types. There wouldn't be any need to walk into
3316 non-statements, except that we have to consider STMT_EXPRs. */
3319 /* Change all returns to just refer to the RESULT_DECL; this is a nop,
3320 but differs from using NULL_TREE in that it indicates that we care
3321 about the value of the RESULT_DECL. */
3322 else if (TREE_CODE (*tp) == RETURN_EXPR)
3323 TREE_OPERAND (*tp, 0) = dp->result;
3324 /* Change all cleanups for the NRV to only run when an exception is
3326 else if (TREE_CODE (*tp) == CLEANUP_STMT
3327 && CLEANUP_DECL (*tp) == dp->var)
3328 CLEANUP_EH_ONLY (*tp) = 1;
3329 /* Replace the DECL_EXPR for the NRV with an initialization of the
3330 RESULT_DECL, if needed. */
3331 else if (TREE_CODE (*tp) == DECL_EXPR
3332 && DECL_EXPR_DECL (*tp) == dp->var)
3335 if (DECL_INITIAL (dp->var)
3336 && DECL_INITIAL (dp->var) != error_mark_node)
3337 init = build2 (INIT_EXPR, void_type_node, dp->result,
3338 DECL_INITIAL (dp->var));
3340 init = build_empty_stmt (EXPR_LOCATION (*tp));
3341 DECL_INITIAL (dp->var) = NULL_TREE;
3342 SET_EXPR_LOCATION (init, EXPR_LOCATION (*tp));
3345 /* And replace all uses of the NRV with the RESULT_DECL. */
3346 else if (*tp == dp->var)
3349 /* Avoid walking into the same tree more than once. Unfortunately, we
3350 can't just use walk_tree_without duplicates because it would only call
3351 us for the first occurrence of dp->var in the function body. */
3352 slot = htab_find_slot (dp->visited, *tp, INSERT);
3358 /* Keep iterating. */
3362 /* Called from finish_function to implement the named return value
3363 optimization by overriding all the RETURN_EXPRs and pertinent
3364 CLEANUP_STMTs and replacing all occurrences of VAR with RESULT, the
3365 RESULT_DECL for the function. */
3368 finalize_nrv (tree *tp, tree var, tree result)
3370 struct nrv_data data;
3372 /* Copy debugging information from VAR to RESULT. */
3373 DECL_NAME (result) = DECL_NAME (var);
3374 DECL_ARTIFICIAL (result) = DECL_ARTIFICIAL (var);
3375 DECL_IGNORED_P (result) = DECL_IGNORED_P (var);
3376 DECL_SOURCE_LOCATION (result) = DECL_SOURCE_LOCATION (var);
3377 DECL_ABSTRACT_ORIGIN (result) = DECL_ABSTRACT_ORIGIN (var);
3378 /* Don't forget that we take its address. */
3379 TREE_ADDRESSABLE (result) = TREE_ADDRESSABLE (var);
3382 data.result = result;
3383 data.visited = htab_create (37, htab_hash_pointer, htab_eq_pointer, NULL);
3384 cp_walk_tree (tp, finalize_nrv_r, &data, 0);
3385 htab_delete (data.visited);
3388 /* Return the declaration for the function called by CALL_EXPR T,
3389 TYPE is the class type of the clause decl. */
3392 omp_clause_info_fndecl (tree t, tree type)
3394 tree ret = get_callee_fndecl (t);
3399 gcc_assert (TREE_CODE (t) == CALL_EXPR);
3400 t = CALL_EXPR_FN (t);
3402 if (TREE_CODE (t) == OBJ_TYPE_REF)
3404 t = cp_fold_obj_type_ref (t, type);
3405 if (TREE_CODE (t) == ADDR_EXPR
3406 && TREE_CODE (TREE_OPERAND (t, 0)) == FUNCTION_DECL)
3407 return TREE_OPERAND (t, 0);
3413 /* Create CP_OMP_CLAUSE_INFO for clause C. Returns true if it is invalid. */
3416 cxx_omp_create_clause_info (tree c, tree type, bool need_default_ctor,
3417 bool need_copy_ctor, bool need_copy_assignment)
3419 int save_errorcount = errorcount;
3422 /* Always allocate 3 elements for simplicity. These are the
3423 function decls for the ctor, dtor, and assignment op.
3424 This layout is known to the three lang hooks,
3425 cxx_omp_clause_default_init, cxx_omp_clause_copy_init,
3426 and cxx_omp_clause_assign_op. */
3427 info = make_tree_vec (3);
3428 CP_OMP_CLAUSE_INFO (c) = info;
3430 if (need_default_ctor
3431 || (need_copy_ctor && !TYPE_HAS_TRIVIAL_INIT_REF (type)))
3435 if (need_default_ctor)
3439 t = build_int_cst (build_pointer_type (type), 0);
3440 t = build1 (INDIRECT_REF, type, t);
3441 vec = make_tree_vector_single (t);
3443 t = build_special_member_call (NULL_TREE, complete_ctor_identifier,
3444 &vec, type, LOOKUP_NORMAL,
3445 tf_warning_or_error);
3448 release_tree_vector (vec);
3450 if (targetm.cxx.cdtor_returns_this () || errorcount)
3451 /* Because constructors and destructors return this,
3452 the call will have been cast to "void". Remove the
3453 cast here. We would like to use STRIP_NOPS, but it
3454 wouldn't work here because TYPE_MODE (t) and
3455 TYPE_MODE (TREE_OPERAND (t, 0)) are different.
3456 They are VOIDmode and Pmode, respectively. */
3457 if (TREE_CODE (t) == NOP_EXPR)
3458 t = TREE_OPERAND (t, 0);
3460 TREE_VEC_ELT (info, 0) = get_callee_fndecl (t);
3463 if ((need_default_ctor || need_copy_ctor)
3464 && TYPE_HAS_NONTRIVIAL_DESTRUCTOR (type))
3466 t = build_int_cst (build_pointer_type (type), 0);
3467 t = build1 (INDIRECT_REF, type, t);
3468 t = build_special_member_call (t, complete_dtor_identifier,
3469 NULL, type, LOOKUP_NORMAL,
3470 tf_warning_or_error);
3472 if (targetm.cxx.cdtor_returns_this () || errorcount)
3473 /* Because constructors and destructors return this,
3474 the call will have been cast to "void". Remove the
3475 cast here. We would like to use STRIP_NOPS, but it
3476 wouldn't work here because TYPE_MODE (t) and
3477 TYPE_MODE (TREE_OPERAND (t, 0)) are different.
3478 They are VOIDmode and Pmode, respectively. */
3479 if (TREE_CODE (t) == NOP_EXPR)
3480 t = TREE_OPERAND (t, 0);
3482 TREE_VEC_ELT (info, 1) = omp_clause_info_fndecl (t, type);
3485 if (need_copy_assignment && !TYPE_HAS_TRIVIAL_ASSIGN_REF (type))
3489 t = build_int_cst (build_pointer_type (type), 0);
3490 t = build1 (INDIRECT_REF, type, t);
3491 vec = make_tree_vector_single (t);
3492 t = build_special_member_call (t, ansi_assopname (NOP_EXPR),
3493 &vec, type, LOOKUP_NORMAL,
3494 tf_warning_or_error);
3495 release_tree_vector (vec);
3497 /* We'll have called convert_from_reference on the call, which
3498 may well have added an indirect_ref. It's unneeded here,
3499 and in the way, so kill it. */
3500 if (TREE_CODE (t) == INDIRECT_REF)
3501 t = TREE_OPERAND (t, 0);
3503 TREE_VEC_ELT (info, 2) = omp_clause_info_fndecl (t, type);
3506 return errorcount != save_errorcount;
3509 /* For all elements of CLAUSES, validate them vs OpenMP constraints.
3510 Remove any elements from the list that are invalid. */
3513 finish_omp_clauses (tree clauses)
3515 bitmap_head generic_head, firstprivate_head, lastprivate_head;
3516 tree c, t, *pc = &clauses;
3519 bitmap_obstack_initialize (NULL);
3520 bitmap_initialize (&generic_head, &bitmap_default_obstack);
3521 bitmap_initialize (&firstprivate_head, &bitmap_default_obstack);
3522 bitmap_initialize (&lastprivate_head, &bitmap_default_obstack);
3524 for (pc = &clauses, c = clauses; c ; c = *pc)
3526 bool remove = false;
3528 switch (OMP_CLAUSE_CODE (c))
3530 case OMP_CLAUSE_SHARED:
3532 goto check_dup_generic;
3533 case OMP_CLAUSE_PRIVATE:
3535 goto check_dup_generic;
3536 case OMP_CLAUSE_REDUCTION:
3538 goto check_dup_generic;
3539 case OMP_CLAUSE_COPYPRIVATE:
3540 name = "copyprivate";
3541 goto check_dup_generic;
3542 case OMP_CLAUSE_COPYIN:
3544 goto check_dup_generic;
3546 t = OMP_CLAUSE_DECL (c);
3547 if (TREE_CODE (t) != VAR_DECL && TREE_CODE (t) != PARM_DECL)
3549 if (processing_template_decl)
3552 error ("%qD is not a variable in clause %qs", t, name);
3554 error ("%qE is not a variable in clause %qs", t, name);
3557 else if (bitmap_bit_p (&generic_head, DECL_UID (t))
3558 || bitmap_bit_p (&firstprivate_head, DECL_UID (t))
3559 || bitmap_bit_p (&lastprivate_head, DECL_UID (t)))
3561 error ("%qD appears more than once in data clauses", t);
3565 bitmap_set_bit (&generic_head, DECL_UID (t));
3568 case OMP_CLAUSE_FIRSTPRIVATE:
3569 t = OMP_CLAUSE_DECL (c);
3570 if (TREE_CODE (t) != VAR_DECL && TREE_CODE (t) != PARM_DECL)
3572 if (processing_template_decl)
3575 error ("%qD is not a variable in clause %<firstprivate%>", t);
3577 error ("%qE is not a variable in clause %<firstprivate%>", t);
3580 else if (bitmap_bit_p (&generic_head, DECL_UID (t))
3581 || bitmap_bit_p (&firstprivate_head, DECL_UID (t)))
3583 error ("%qD appears more than once in data clauses", t);
3587 bitmap_set_bit (&firstprivate_head, DECL_UID (t));
3590 case OMP_CLAUSE_LASTPRIVATE:
3591 t = OMP_CLAUSE_DECL (c);
3592 if (TREE_CODE (t) != VAR_DECL && TREE_CODE (t) != PARM_DECL)
3594 if (processing_template_decl)
3597 error ("%qD is not a variable in clause %<lastprivate%>", t);
3599 error ("%qE is not a variable in clause %<lastprivate%>", t);
3602 else if (bitmap_bit_p (&generic_head, DECL_UID (t))
3603 || bitmap_bit_p (&lastprivate_head, DECL_UID (t)))
3605 error ("%qD appears more than once in data clauses", t);
3609 bitmap_set_bit (&lastprivate_head, DECL_UID (t));
3613 t = OMP_CLAUSE_IF_EXPR (c);
3614 t = maybe_convert_cond (t);
3615 if (t == error_mark_node)
3617 OMP_CLAUSE_IF_EXPR (c) = t;
3620 case OMP_CLAUSE_NUM_THREADS:
3621 t = OMP_CLAUSE_NUM_THREADS_EXPR (c);
3622 if (t == error_mark_node)
3624 else if (!type_dependent_expression_p (t)
3625 && !INTEGRAL_TYPE_P (TREE_TYPE (t)))
3627 error ("num_threads expression must be integral");
3632 case OMP_CLAUSE_SCHEDULE:
3633 t = OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c);
3636 else if (t == error_mark_node)
3638 else if (!type_dependent_expression_p (t)
3639 && !INTEGRAL_TYPE_P (TREE_TYPE (t)))
3641 error ("schedule chunk size expression must be integral");
3646 case OMP_CLAUSE_NOWAIT:
3647 case OMP_CLAUSE_ORDERED:
3648 case OMP_CLAUSE_DEFAULT:
3649 case OMP_CLAUSE_UNTIED:
3650 case OMP_CLAUSE_COLLAPSE:
3658 *pc = OMP_CLAUSE_CHAIN (c);
3660 pc = &OMP_CLAUSE_CHAIN (c);
3663 for (pc = &clauses, c = clauses; c ; c = *pc)
3665 enum omp_clause_code c_kind = OMP_CLAUSE_CODE (c);
3666 bool remove = false;
3667 bool need_complete_non_reference = false;
3668 bool need_default_ctor = false;
3669 bool need_copy_ctor = false;
3670 bool need_copy_assignment = false;
3671 bool need_implicitly_determined = false;
3672 tree type, inner_type;
3676 case OMP_CLAUSE_SHARED:
3678 need_implicitly_determined = true;
3680 case OMP_CLAUSE_PRIVATE:
3682 need_complete_non_reference = true;
3683 need_default_ctor = true;
3684 need_implicitly_determined = true;
3686 case OMP_CLAUSE_FIRSTPRIVATE:
3687 name = "firstprivate";
3688 need_complete_non_reference = true;
3689 need_copy_ctor = true;
3690 need_implicitly_determined = true;
3692 case OMP_CLAUSE_LASTPRIVATE:
3693 name = "lastprivate";
3694 need_complete_non_reference = true;
3695 need_copy_assignment = true;
3696 need_implicitly_determined = true;
3698 case OMP_CLAUSE_REDUCTION:
3700 need_implicitly_determined = true;
3702 case OMP_CLAUSE_COPYPRIVATE:
3703 name = "copyprivate";
3704 need_copy_assignment = true;
3706 case OMP_CLAUSE_COPYIN:
3708 need_copy_assignment = true;
3711 pc = &OMP_CLAUSE_CHAIN (c);
3715 t = OMP_CLAUSE_DECL (c);
3716 if (processing_template_decl
3717 && TREE_CODE (t) != VAR_DECL && TREE_CODE (t) != PARM_DECL)
3719 pc = &OMP_CLAUSE_CHAIN (c);
3725 case OMP_CLAUSE_LASTPRIVATE:
3726 if (!bitmap_bit_p (&firstprivate_head, DECL_UID (t)))
3727 need_default_ctor = true;
3730 case OMP_CLAUSE_REDUCTION:
3731 if (AGGREGATE_TYPE_P (TREE_TYPE (t))
3732 || POINTER_TYPE_P (TREE_TYPE (t)))
3734 error ("%qE has invalid type for %<reduction%>", t);
3737 else if (FLOAT_TYPE_P (TREE_TYPE (t)))
3739 enum tree_code r_code = OMP_CLAUSE_REDUCTION_CODE (c);
3747 error ("%qE has invalid type for %<reduction(%s)%>",
3748 t, operator_name_info[r_code].name);
3754 case OMP_CLAUSE_COPYIN:
3755 if (TREE_CODE (t) != VAR_DECL || !DECL_THREAD_LOCAL_P (t))
3757 error ("%qE must be %<threadprivate%> for %<copyin%>", t);
3766 if (need_complete_non_reference)
3768 t = require_complete_type (t);
3769 if (t == error_mark_node)
3771 else if (TREE_CODE (TREE_TYPE (t)) == REFERENCE_TYPE)
3773 error ("%qE has reference type for %qs", t, name);
3777 if (need_implicitly_determined)
3779 const char *share_name = NULL;
3781 if (TREE_CODE (t) == VAR_DECL && DECL_THREAD_LOCAL_P (t))
3782 share_name = "threadprivate";
3783 else switch (cxx_omp_predetermined_sharing (t))
3785 case OMP_CLAUSE_DEFAULT_UNSPECIFIED:
3787 case OMP_CLAUSE_DEFAULT_SHARED:
3788 share_name = "shared";
3790 case OMP_CLAUSE_DEFAULT_PRIVATE:
3791 share_name = "private";
3798 error ("%qE is predetermined %qs for %qs",
3799 t, share_name, name);
3804 /* We're interested in the base element, not arrays. */
3805 inner_type = type = TREE_TYPE (t);
3806 while (TREE_CODE (inner_type) == ARRAY_TYPE)
3807 inner_type = TREE_TYPE (inner_type);
3809 /* Check for special function availability by building a call to one.
3810 Save the results, because later we won't be in the right context
3811 for making these queries. */
3812 if (CLASS_TYPE_P (inner_type)
3813 && (need_default_ctor || need_copy_ctor || need_copy_assignment)
3814 && !type_dependent_expression_p (t)
3815 && cxx_omp_create_clause_info (c, inner_type, need_default_ctor,
3816 need_copy_ctor, need_copy_assignment))
3820 *pc = OMP_CLAUSE_CHAIN (c);
3822 pc = &OMP_CLAUSE_CHAIN (c);
3825 bitmap_obstack_release (NULL);
3829 /* For all variables in the tree_list VARS, mark them as thread local. */
3832 finish_omp_threadprivate (tree vars)
3836 /* Mark every variable in VARS to be assigned thread local storage. */
3837 for (t = vars; t; t = TREE_CHAIN (t))
3839 tree v = TREE_PURPOSE (t);
3841 if (error_operand_p (v))
3843 else if (TREE_CODE (v) != VAR_DECL)
3844 error ("%<threadprivate%> %qD is not file, namespace "
3845 "or block scope variable", v);
3846 /* If V had already been marked threadprivate, it doesn't matter
3847 whether it had been used prior to this point. */
3848 else if (TREE_USED (v)
3849 && (DECL_LANG_SPECIFIC (v) == NULL
3850 || !CP_DECL_THREADPRIVATE_P (v)))
3851 error ("%qE declared %<threadprivate%> after first use", v);
3852 else if (! TREE_STATIC (v) && ! DECL_EXTERNAL (v))
3853 error ("automatic variable %qE cannot be %<threadprivate%>", v);
3854 else if (! COMPLETE_TYPE_P (TREE_TYPE (v)))
3855 error ("%<threadprivate%> %qE has incomplete type", v);
3856 else if (TREE_STATIC (v) && TYPE_P (CP_DECL_CONTEXT (v))
3857 && CP_DECL_CONTEXT (v) != current_class_type)
3858 error ("%<threadprivate%> %qE directive not "
3859 "in %qT definition", v, CP_DECL_CONTEXT (v));
3862 /* Allocate a LANG_SPECIFIC structure for V, if needed. */
3863 if (DECL_LANG_SPECIFIC (v) == NULL)
3865 retrofit_lang_decl (v);
3867 /* Make sure that DECL_DISCRIMINATOR_P continues to be true
3868 after the allocation of the lang_decl structure. */
3869 if (DECL_DISCRIMINATOR_P (v))
3870 DECL_LANG_SPECIFIC (v)->u.base.u2sel = 1;
3873 if (! DECL_THREAD_LOCAL_P (v))
3875 DECL_TLS_MODEL (v) = decl_default_tls_model (v);
3876 /* If rtl has been already set for this var, call
3877 make_decl_rtl once again, so that encode_section_info
3878 has a chance to look at the new decl flags. */
3879 if (DECL_RTL_SET_P (v))
3882 CP_DECL_THREADPRIVATE_P (v) = 1;
3887 /* Build an OpenMP structured block. */
3890 begin_omp_structured_block (void)
3892 return do_pushlevel (sk_omp);
3896 finish_omp_structured_block (tree block)
3898 return do_poplevel (block);
3901 /* Similarly, except force the retention of the BLOCK. */
3904 begin_omp_parallel (void)
3906 keep_next_level (true);
3907 return begin_omp_structured_block ();
3911 finish_omp_parallel (tree clauses, tree body)
3915 body = finish_omp_structured_block (body);
3917 stmt = make_node (OMP_PARALLEL);
3918 TREE_TYPE (stmt) = void_type_node;
3919 OMP_PARALLEL_CLAUSES (stmt) = clauses;
3920 OMP_PARALLEL_BODY (stmt) = body;
3922 return add_stmt (stmt);
3926 begin_omp_task (void)
3928 keep_next_level (true);
3929 return begin_omp_structured_block ();
3933 finish_omp_task (tree clauses, tree body)
3937 body = finish_omp_structured_block (body);
3939 stmt = make_node (OMP_TASK);
3940 TREE_TYPE (stmt) = void_type_node;
3941 OMP_TASK_CLAUSES (stmt) = clauses;
3942 OMP_TASK_BODY (stmt) = body;
3944 return add_stmt (stmt);
3947 /* Helper function for finish_omp_for. Convert Ith random access iterator
3948 into integral iterator. Return FALSE if successful. */
3951 handle_omp_for_class_iterator (int i, location_t locus, tree declv, tree initv,
3952 tree condv, tree incrv, tree *body,
3953 tree *pre_body, tree clauses)
3955 tree diff, iter_init, iter_incr = NULL, last;
3956 tree incr_var = NULL, orig_pre_body, orig_body, c;
3957 tree decl = TREE_VEC_ELT (declv, i);
3958 tree init = TREE_VEC_ELT (initv, i);
3959 tree cond = TREE_VEC_ELT (condv, i);
3960 tree incr = TREE_VEC_ELT (incrv, i);
3962 location_t elocus = locus;
3964 if (init && EXPR_HAS_LOCATION (init))
3965 elocus = EXPR_LOCATION (init);
3967 switch (TREE_CODE (cond))
3973 if (TREE_OPERAND (cond, 1) == iter)
3974 cond = build2 (swap_tree_comparison (TREE_CODE (cond)),
3975 TREE_TYPE (cond), iter, TREE_OPERAND (cond, 0));
3976 if (TREE_OPERAND (cond, 0) != iter)
3977 cond = error_mark_node;
3980 tree tem = build_x_binary_op (TREE_CODE (cond), iter, ERROR_MARK,
3981 TREE_OPERAND (cond, 1), ERROR_MARK,
3982 NULL, tf_warning_or_error);
3983 if (error_operand_p (tem))
3988 cond = error_mark_node;
3991 if (cond == error_mark_node)
3993 error_at (elocus, "invalid controlling predicate");
3996 diff = build_x_binary_op (MINUS_EXPR, TREE_OPERAND (cond, 1),
3997 ERROR_MARK, iter, ERROR_MARK, NULL,
3998 tf_warning_or_error);
3999 if (error_operand_p (diff))
4001 if (TREE_CODE (TREE_TYPE (diff)) != INTEGER_TYPE)
4003 error_at (elocus, "difference between %qE and %qD does not have integer type",
4004 TREE_OPERAND (cond, 1), iter);
4008 switch (TREE_CODE (incr))
4010 case PREINCREMENT_EXPR:
4011 case PREDECREMENT_EXPR:
4012 case POSTINCREMENT_EXPR:
4013 case POSTDECREMENT_EXPR:
4014 if (TREE_OPERAND (incr, 0) != iter)
4016 incr = error_mark_node;
4019 iter_incr = build_x_unary_op (TREE_CODE (incr), iter,
4020 tf_warning_or_error);
4021 if (error_operand_p (iter_incr))
4023 else if (TREE_CODE (incr) == PREINCREMENT_EXPR
4024 || TREE_CODE (incr) == POSTINCREMENT_EXPR)
4025 incr = integer_one_node;
4027 incr = integer_minus_one_node;
4030 if (TREE_OPERAND (incr, 0) != iter)
4031 incr = error_mark_node;
4032 else if (TREE_CODE (TREE_OPERAND (incr, 1)) == PLUS_EXPR
4033 || TREE_CODE (TREE_OPERAND (incr, 1)) == MINUS_EXPR)
4035 tree rhs = TREE_OPERAND (incr, 1);
4036 if (TREE_OPERAND (rhs, 0) == iter)
4038 if (TREE_CODE (TREE_TYPE (TREE_OPERAND (rhs, 1)))
4040 incr = error_mark_node;
4043 iter_incr = build_x_modify_expr (iter, TREE_CODE (rhs),
4044 TREE_OPERAND (rhs, 1),
4045 tf_warning_or_error);
4046 if (error_operand_p (iter_incr))
4048 incr = TREE_OPERAND (rhs, 1);
4049 incr = cp_convert (TREE_TYPE (diff), incr);
4050 if (TREE_CODE (rhs) == MINUS_EXPR)
4052 incr = build1 (NEGATE_EXPR, TREE_TYPE (diff), incr);
4053 incr = fold_if_not_in_template (incr);
4055 if (TREE_CODE (incr) != INTEGER_CST
4056 && (TREE_CODE (incr) != NOP_EXPR
4057 || (TREE_CODE (TREE_OPERAND (incr, 0))
4062 else if (TREE_OPERAND (rhs, 1) == iter)
4064 if (TREE_CODE (TREE_TYPE (TREE_OPERAND (rhs, 0))) != INTEGER_TYPE
4065 || TREE_CODE (rhs) != PLUS_EXPR)
4066 incr = error_mark_node;
4069 iter_incr = build_x_binary_op (PLUS_EXPR,
4070 TREE_OPERAND (rhs, 0),
4073 tf_warning_or_error);
4074 if (error_operand_p (iter_incr))
4076 iter_incr = build_x_modify_expr (iter, NOP_EXPR,
4078 tf_warning_or_error);
4079 if (error_operand_p (iter_incr))
4081 incr = TREE_OPERAND (rhs, 0);
4086 incr = error_mark_node;
4089 incr = error_mark_node;
4092 incr = error_mark_node;
4096 if (incr == error_mark_node)
4098 error_at (elocus, "invalid increment expression");
4102 incr = cp_convert (TREE_TYPE (diff), incr);
4103 for (c = clauses; c ; c = OMP_CLAUSE_CHAIN (c))
4104 if (OMP_CLAUSE_CODE (c) == OMP_CLAUSE_LASTPRIVATE
4105 && OMP_CLAUSE_DECL (c) == iter)
4108 decl = create_temporary_var (TREE_TYPE (diff));
4110 add_decl_expr (decl);
4111 last = create_temporary_var (TREE_TYPE (diff));
4113 add_decl_expr (last);
4114 if (c && iter_incr == NULL)
4116 incr_var = create_temporary_var (TREE_TYPE (diff));
4117 pushdecl (incr_var);
4118 add_decl_expr (incr_var);
4120 gcc_assert (stmts_are_full_exprs_p ());
4122 orig_pre_body = *pre_body;
4123 *pre_body = push_stmt_list ();
4125 add_stmt (orig_pre_body);
4127 finish_expr_stmt (build_x_modify_expr (iter, NOP_EXPR, init,
4128 tf_warning_or_error));
4129 init = build_int_cst (TREE_TYPE (diff), 0);
4130 if (c && iter_incr == NULL)
4132 finish_expr_stmt (build_x_modify_expr (incr_var, NOP_EXPR,
4133 incr, tf_warning_or_error));
4135 iter_incr = build_x_modify_expr (iter, PLUS_EXPR, incr,
4136 tf_warning_or_error);
4138 finish_expr_stmt (build_x_modify_expr (last, NOP_EXPR, init,
4139 tf_warning_or_error));
4140 *pre_body = pop_stmt_list (*pre_body);
4142 cond = cp_build_binary_op (elocus,
4143 TREE_CODE (cond), decl, diff,
4144 tf_warning_or_error);
4145 incr = build_modify_expr (elocus, decl, NULL_TREE, PLUS_EXPR,
4146 elocus, incr, NULL_TREE);
4149 *body = push_stmt_list ();
4150 iter_init = build2 (MINUS_EXPR, TREE_TYPE (diff), decl, last);
4151 iter_init = build_x_modify_expr (iter, PLUS_EXPR, iter_init,
4152 tf_warning_or_error);
4153 iter_init = build1 (NOP_EXPR, void_type_node, iter_init);
4154 finish_expr_stmt (iter_init);
4155 finish_expr_stmt (build_x_modify_expr (last, NOP_EXPR, decl,
4156 tf_warning_or_error));
4157 add_stmt (orig_body);
4158 *body = pop_stmt_list (*body);
4162 OMP_CLAUSE_LASTPRIVATE_STMT (c) = push_stmt_list ();
4163 finish_expr_stmt (iter_incr);
4164 OMP_CLAUSE_LASTPRIVATE_STMT (c)
4165 = pop_stmt_list (OMP_CLAUSE_LASTPRIVATE_STMT (c));
4168 TREE_VEC_ELT (declv, i) = decl;
4169 TREE_VEC_ELT (initv, i) = init;
4170 TREE_VEC_ELT (condv, i) = cond;
4171 TREE_VEC_ELT (incrv, i) = incr;
4176 /* Build and validate an OMP_FOR statement. CLAUSES, BODY, COND, INCR
4177 are directly for their associated operands in the statement. DECL
4178 and INIT are a combo; if DECL is NULL then INIT ought to be a
4179 MODIFY_EXPR, and the DECL should be extracted. PRE_BODY are
4180 optional statements that need to go before the loop into its
4184 finish_omp_for (location_t locus, tree declv, tree initv, tree condv,
4185 tree incrv, tree body, tree pre_body, tree clauses)
4187 tree omp_for = NULL, orig_incr = NULL;
4188 tree decl, init, cond, incr;
4192 gcc_assert (TREE_VEC_LENGTH (declv) == TREE_VEC_LENGTH (initv));
4193 gcc_assert (TREE_VEC_LENGTH (declv) == TREE_VEC_LENGTH (condv));
4194 gcc_assert (TREE_VEC_LENGTH (declv) == TREE_VEC_LENGTH (incrv));
4195 for (i = 0; i < TREE_VEC_LENGTH (declv); i++)
4197 decl = TREE_VEC_ELT (declv, i);
4198 init = TREE_VEC_ELT (initv, i);
4199 cond = TREE_VEC_ELT (condv, i);
4200 incr = TREE_VEC_ELT (incrv, i);
4206 switch (TREE_CODE (init))
4209 decl = TREE_OPERAND (init, 0);
4210 init = TREE_OPERAND (init, 1);
4213 if (TREE_CODE (TREE_OPERAND (init, 1)) == NOP_EXPR)
4215 decl = TREE_OPERAND (init, 0);
4216 init = TREE_OPERAND (init, 2);
4226 "expected iteration declaration or initialization");
4231 if (init && EXPR_HAS_LOCATION (init))
4232 elocus = EXPR_LOCATION (init);
4236 error_at (elocus, "missing controlling predicate");
4242 error_at (elocus, "missing increment expression");
4246 TREE_VEC_ELT (declv, i) = decl;
4247 TREE_VEC_ELT (initv, i) = init;
4250 if (dependent_omp_for_p (declv, initv, condv, incrv))
4254 stmt = make_node (OMP_FOR);
4256 for (i = 0; i < TREE_VEC_LENGTH (declv); i++)
4258 /* This is really just a place-holder. We'll be decomposing this
4259 again and going through the cp_build_modify_expr path below when
4260 we instantiate the thing. */
4261 TREE_VEC_ELT (initv, i)
4262 = build2 (MODIFY_EXPR, void_type_node, TREE_VEC_ELT (declv, i),
4263 TREE_VEC_ELT (initv, i));
4266 TREE_TYPE (stmt) = void_type_node;
4267 OMP_FOR_INIT (stmt) = initv;
4268 OMP_FOR_COND (stmt) = condv;
4269 OMP_FOR_INCR (stmt) = incrv;
4270 OMP_FOR_BODY (stmt) = body;
4271 OMP_FOR_PRE_BODY (stmt) = pre_body;
4272 OMP_FOR_CLAUSES (stmt) = clauses;
4274 SET_EXPR_LOCATION (stmt, locus);
4275 return add_stmt (stmt);
4278 if (processing_template_decl)
4279 orig_incr = make_tree_vec (TREE_VEC_LENGTH (incrv));
4281 for (i = 0; i < TREE_VEC_LENGTH (declv); )
4283 decl = TREE_VEC_ELT (declv, i);
4284 init = TREE_VEC_ELT (initv, i);
4285 cond = TREE_VEC_ELT (condv, i);
4286 incr = TREE_VEC_ELT (incrv, i);
4288 TREE_VEC_ELT (orig_incr, i) = incr;
4291 if (init && EXPR_HAS_LOCATION (init))
4292 elocus = EXPR_LOCATION (init);
4296 error_at (elocus, "expected iteration declaration or initialization");
4300 if (incr && TREE_CODE (incr) == MODOP_EXPR)
4303 TREE_VEC_ELT (orig_incr, i) = incr;
4304 incr = cp_build_modify_expr (TREE_OPERAND (incr, 0),
4305 TREE_CODE (TREE_OPERAND (incr, 1)),
4306 TREE_OPERAND (incr, 2),
4307 tf_warning_or_error);
4310 if (CLASS_TYPE_P (TREE_TYPE (decl)))
4312 if (handle_omp_for_class_iterator (i, locus, declv, initv, condv,
4313 incrv, &body, &pre_body, clauses))
4318 if (!INTEGRAL_TYPE_P (TREE_TYPE (decl))
4319 && TREE_CODE (TREE_TYPE (decl)) != POINTER_TYPE)
4321 error_at (elocus, "invalid type for iteration variable %qE", decl);
4325 if (!processing_template_decl)
4327 init = fold_build_cleanup_point_expr (TREE_TYPE (init), init);
4328 init = cp_build_modify_expr (decl, NOP_EXPR, init, tf_warning_or_error);
4331 init = build2 (MODIFY_EXPR, void_type_node, decl, init);
4333 && TREE_SIDE_EFFECTS (cond)
4334 && COMPARISON_CLASS_P (cond)
4335 && !processing_template_decl)
4337 tree t = TREE_OPERAND (cond, 0);
4338 if (TREE_SIDE_EFFECTS (t)
4340 && (TREE_CODE (t) != NOP_EXPR
4341 || TREE_OPERAND (t, 0) != decl))
4342 TREE_OPERAND (cond, 0)
4343 = fold_build_cleanup_point_expr (TREE_TYPE (t), t);
4345 t = TREE_OPERAND (cond, 1);
4346 if (TREE_SIDE_EFFECTS (t)
4348 && (TREE_CODE (t) != NOP_EXPR
4349 || TREE_OPERAND (t, 0) != decl))
4350 TREE_OPERAND (cond, 1)
4351 = fold_build_cleanup_point_expr (TREE_TYPE (t), t);
4353 if (decl == error_mark_node || init == error_mark_node)
4356 TREE_VEC_ELT (declv, i) = decl;
4357 TREE_VEC_ELT (initv, i) = init;
4358 TREE_VEC_ELT (condv, i) = cond;
4359 TREE_VEC_ELT (incrv, i) = incr;
4363 if (IS_EMPTY_STMT (pre_body))
4366 omp_for = c_finish_omp_for (locus, declv, initv, condv, incrv,
4369 if (omp_for == NULL)
4372 for (i = 0; i < TREE_VEC_LENGTH (OMP_FOR_INCR (omp_for)); i++)
4374 decl = TREE_OPERAND (TREE_VEC_ELT (OMP_FOR_INIT (omp_for), i), 0);
4375 incr = TREE_VEC_ELT (OMP_FOR_INCR (omp_for), i);
4377 if (TREE_CODE (incr) != MODIFY_EXPR)
4380 if (TREE_SIDE_EFFECTS (TREE_OPERAND (incr, 1))
4381 && BINARY_CLASS_P (TREE_OPERAND (incr, 1))
4382 && !processing_template_decl)
4384 tree t = TREE_OPERAND (TREE_OPERAND (incr, 1), 0);
4385 if (TREE_SIDE_EFFECTS (t)
4387 && (TREE_CODE (t) != NOP_EXPR
4388 || TREE_OPERAND (t, 0) != decl))
4389 TREE_OPERAND (TREE_OPERAND (incr, 1), 0)
4390 = fold_build_cleanup_point_expr (TREE_TYPE (t), t);
4392 t = TREE_OPERAND (TREE_OPERAND (incr, 1), 1);
4393 if (TREE_SIDE_EFFECTS (t)
4395 && (TREE_CODE (t) != NOP_EXPR
4396 || TREE_OPERAND (t, 0) != decl))
4397 TREE_OPERAND (TREE_OPERAND (incr, 1), 1)
4398 = fold_build_cleanup_point_expr (TREE_TYPE (t), t);
4402 TREE_VEC_ELT (OMP_FOR_INCR (omp_for), i) = TREE_VEC_ELT (orig_incr, i);
4404 if (omp_for != NULL)
4405 OMP_FOR_CLAUSES (omp_for) = clauses;
4410 finish_omp_atomic (enum tree_code code, tree lhs, tree rhs)
4419 dependent_p = false;
4422 /* Even in a template, we can detect invalid uses of the atomic
4423 pragma if neither LHS nor RHS is type-dependent. */
4424 if (processing_template_decl)
4426 dependent_p = (type_dependent_expression_p (lhs)
4427 || type_dependent_expression_p (rhs));
4430 lhs = build_non_dependent_expr (lhs);
4431 rhs = build_non_dependent_expr (rhs);
4436 stmt = c_finish_omp_atomic (input_location, code, lhs, rhs);
4437 if (stmt == error_mark_node)
4440 if (processing_template_decl)
4441 stmt = build2 (OMP_ATOMIC, void_type_node, integer_zero_node,
4442 build2 (code, void_type_node, orig_lhs, orig_rhs));
4447 finish_omp_barrier (void)
4449 tree fn = built_in_decls[BUILT_IN_GOMP_BARRIER];
4450 VEC(tree,gc) *vec = make_tree_vector ();
4451 tree stmt = finish_call_expr (fn, &vec, false, false, tf_warning_or_error);
4452 release_tree_vector (vec);
4453 finish_expr_stmt (stmt);
4457 finish_omp_flush (void)
4459 tree fn = built_in_decls[BUILT_IN_SYNCHRONIZE];
4460 VEC(tree,gc) *vec = make_tree_vector ();
4461 tree stmt = finish_call_expr (fn, &vec, false, false, tf_warning_or_error);
4462 release_tree_vector (vec);
4463 finish_expr_stmt (stmt);
4467 finish_omp_taskwait (void)
4469 tree fn = built_in_decls[BUILT_IN_GOMP_TASKWAIT];
4470 VEC(tree,gc) *vec = make_tree_vector ();
4471 tree stmt = finish_call_expr (fn, &vec, false, false, tf_warning_or_error);
4472 release_tree_vector (vec);
4473 finish_expr_stmt (stmt);
4477 init_cp_semantics (void)
4481 /* Build a STATIC_ASSERT for a static assertion with the condition
4482 CONDITION and the message text MESSAGE. LOCATION is the location
4483 of the static assertion in the source code. When MEMBER_P, this
4484 static assertion is a member of a class. */
4486 finish_static_assert (tree condition, tree message, location_t location,
4489 if (check_for_bare_parameter_packs (condition))
4490 condition = error_mark_node;
4492 if (type_dependent_expression_p (condition)
4493 || value_dependent_expression_p (condition))
4495 /* We're in a template; build a STATIC_ASSERT and put it in
4499 assertion = make_node (STATIC_ASSERT);
4500 STATIC_ASSERT_CONDITION (assertion) = condition;
4501 STATIC_ASSERT_MESSAGE (assertion) = message;
4502 STATIC_ASSERT_SOURCE_LOCATION (assertion) = location;
4505 maybe_add_class_template_decl_list (current_class_type,
4509 add_stmt (assertion);
4514 /* Fold the expression and convert it to a boolean value. */
4515 condition = fold_non_dependent_expr (condition);
4516 condition = cp_convert (boolean_type_node, condition);
4518 if (TREE_CODE (condition) == INTEGER_CST && !integer_zerop (condition))
4519 /* Do nothing; the condition is satisfied. */
4523 location_t saved_loc = input_location;
4525 input_location = location;
4526 if (TREE_CODE (condition) == INTEGER_CST
4527 && integer_zerop (condition))
4528 /* Report the error. */
4529 error ("static assertion failed: %E", message);
4530 else if (condition && condition != error_mark_node)
4531 error ("non-constant condition for static assertion");
4532 input_location = saved_loc;
4536 /* Returns decltype((EXPR)) for cases where we can drop the decltype and
4537 just return the type even though EXPR is a type-dependent expression.
4538 The ABI specifies which cases this applies to, which is a subset of the
4542 describable_type (tree expr)
4544 tree type = NULL_TREE;
4546 if (! type_dependent_expression_p (expr)
4547 && ! type_unknown_p (expr))
4549 type = unlowered_expr_type (expr);
4550 if (real_lvalue_p (expr))
4551 type = build_reference_type (type);
4557 switch (TREE_CODE (expr))
4563 /* Named rvalue reference becomes lvalue. */
4564 type = build_reference_type (non_reference (TREE_TYPE (expr)));
4569 case TEMPLATE_PARM_INDEX:
4571 case STATIC_CAST_EXPR:
4572 case REINTERPRET_CAST_EXPR:
4573 case CONST_CAST_EXPR:
4574 case DYNAMIC_CAST_EXPR:
4575 type = TREE_TYPE (expr);
4580 tree ptrtype = describable_type (TREE_OPERAND (expr, 0));
4581 if (ptrtype && POINTER_TYPE_P (ptrtype))
4582 type = build_reference_type (TREE_TYPE (ptrtype));
4587 if (TREE_CODE_CLASS (TREE_CODE (expr)) == tcc_constant)
4588 type = TREE_TYPE (expr);
4592 if (type && type_uses_auto (type))
4598 /* Implements the C++0x decltype keyword. Returns the type of EXPR,
4599 suitable for use as a type-specifier.
4601 ID_EXPRESSION_OR_MEMBER_ACCESS_P is true when EXPR was parsed as an
4602 id-expression or a class member access, FALSE when it was parsed as
4603 a full expression. */
4606 finish_decltype_type (tree expr, bool id_expression_or_member_access_p)
4608 tree orig_expr = expr;
4609 tree type = NULL_TREE;
4611 if (!expr || error_operand_p (expr))
4612 return error_mark_node;
4615 || TREE_CODE (expr) == TYPE_DECL
4616 || (TREE_CODE (expr) == BIT_NOT_EXPR
4617 && TYPE_P (TREE_OPERAND (expr, 0))))
4619 error ("argument to decltype must be an expression");
4620 return error_mark_node;
4623 if (type_dependent_expression_p (expr))
4625 if (id_expression_or_member_access_p)
4627 switch (TREE_CODE (expr))
4634 case TEMPLATE_PARM_INDEX:
4635 type = TREE_TYPE (expr);
4643 if (type && !type_uses_auto (type))
4646 type = cxx_make_type (DECLTYPE_TYPE);
4647 DECLTYPE_TYPE_EXPR (type) = expr;
4648 DECLTYPE_TYPE_ID_EXPR_OR_MEMBER_ACCESS_P (type)
4649 = id_expression_or_member_access_p;
4650 SET_TYPE_STRUCTURAL_EQUALITY (type);
4655 /* The type denoted by decltype(e) is defined as follows: */
4657 if (id_expression_or_member_access_p)
4659 /* If e is an id-expression or a class member access (5.2.5
4660 [expr.ref]), decltype(e) is defined as the type of the entity
4661 named by e. If there is no such entity, or e names a set of
4662 overloaded functions, the program is ill-formed. */
4663 if (TREE_CODE (expr) == IDENTIFIER_NODE)
4664 expr = lookup_name (expr);
4666 if (TREE_CODE (expr) == INDIRECT_REF)
4667 /* This can happen when the expression is, e.g., "a.b". Just
4668 look at the underlying operand. */
4669 expr = TREE_OPERAND (expr, 0);
4671 if (TREE_CODE (expr) == OFFSET_REF
4672 || TREE_CODE (expr) == MEMBER_REF)
4673 /* We're only interested in the field itself. If it is a
4674 BASELINK, we will need to see through it in the next
4676 expr = TREE_OPERAND (expr, 1);
4678 if (TREE_CODE (expr) == BASELINK)
4679 /* See through BASELINK nodes to the underlying functions. */
4680 expr = BASELINK_FUNCTIONS (expr);
4682 if (TREE_CODE (expr) == OVERLOAD)
4684 if (OVL_CHAIN (expr))
4686 error ("%qE refers to a set of overloaded functions", orig_expr);
4687 return error_mark_node;
4690 /* An overload set containing only one function: just look
4691 at that function. */
4692 expr = OVL_FUNCTION (expr);
4695 switch (TREE_CODE (expr))
4698 if (DECL_BIT_FIELD_TYPE (expr))
4700 type = DECL_BIT_FIELD_TYPE (expr);
4703 /* Fall through for fields that aren't bitfields. */
4710 case TEMPLATE_PARM_INDEX:
4711 type = TREE_TYPE (expr);
4715 type = error_mark_node;
4719 type = is_bitfield_expr_with_lowered_type (expr);
4721 type = TREE_TYPE (TREE_OPERAND (expr, 1));
4728 /* We can get here when the id-expression refers to an
4730 type = TREE_TYPE (expr);
4734 gcc_assert (TYPE_P (expr) || DECL_P (expr)
4735 || TREE_CODE (expr) == SCOPE_REF);
4736 error ("argument to decltype must be an expression");
4737 return error_mark_node;
4742 /* Expressions of reference type are sometimes wrapped in
4743 INDIRECT_REFs. INDIRECT_REFs are just internal compiler
4744 representation, not part of the language, so we have to look
4746 if (TREE_CODE (expr) == INDIRECT_REF
4747 && TREE_CODE (TREE_TYPE (TREE_OPERAND (expr, 0)))
4749 expr = TREE_OPERAND (expr, 0);
4751 if (TREE_CODE (expr) == CALL_EXPR)
4753 /* If e is a function call (5.2.2 [expr.call]) or an
4754 invocation of an overloaded operator (parentheses around e
4755 are ignored), decltype(e) is defined as the return type of
4757 tree fndecl = get_callee_fndecl (expr);
4758 if (fndecl && fndecl != error_mark_node)
4759 type = TREE_TYPE (TREE_TYPE (fndecl));
4762 tree target_type = TREE_TYPE (CALL_EXPR_FN (expr));
4763 if ((TREE_CODE (target_type) == REFERENCE_TYPE
4764 || TREE_CODE (target_type) == POINTER_TYPE)
4765 && (TREE_CODE (TREE_TYPE (target_type)) == FUNCTION_TYPE
4766 || TREE_CODE (TREE_TYPE (target_type)) == METHOD_TYPE))
4767 type = TREE_TYPE (TREE_TYPE (target_type));
4769 sorry ("unable to determine the declared type of expression %<%E%>",
4775 type = is_bitfield_expr_with_lowered_type (expr);
4778 /* Bitfields are special, because their type encodes the
4779 number of bits they store. If the expression referenced a
4780 bitfield, TYPE now has the declared type of that
4782 type = cp_build_qualified_type (type,
4783 cp_type_quals (TREE_TYPE (expr)));
4785 if (real_lvalue_p (expr))
4786 type = build_reference_type (type);
4790 /* Otherwise, where T is the type of e, if e is an lvalue,
4791 decltype(e) is defined as T&, otherwise decltype(e) is
4793 type = TREE_TYPE (expr);
4794 if (type == error_mark_node)
4795 return error_mark_node;
4796 else if (expr == current_class_ptr)
4797 /* If the expression is just "this", we want the
4798 cv-unqualified pointer for the "this" type. */
4799 type = TYPE_MAIN_VARIANT (type);
4800 else if (real_lvalue_p (expr))
4802 if (TREE_CODE (type) != REFERENCE_TYPE)
4803 type = build_reference_type (type);
4806 type = non_reference (type);
4811 if (!type || type == unknown_type_node)
4813 error ("type of %qE is unknown", expr);
4814 return error_mark_node;
4820 /* Called from trait_expr_value to evaluate either __has_nothrow_assign or
4821 __has_nothrow_copy, depending on assign_p. */
4824 classtype_has_nothrow_assign_or_copy_p (tree type, bool assign_p)
4831 ix = lookup_fnfields_1 (type, ansi_assopname (NOP_EXPR));
4834 fns = VEC_index (tree, CLASSTYPE_METHOD_VEC (type), ix);
4836 else if (TYPE_HAS_INIT_REF (type))
4838 /* If construction of the copy constructor was postponed, create
4840 if (CLASSTYPE_LAZY_COPY_CTOR (type))
4841 lazily_declare_fn (sfk_copy_constructor, type);
4842 fns = CLASSTYPE_CONSTRUCTORS (type);
4847 for (; fns; fns = OVL_NEXT (fns))
4849 tree fn = OVL_CURRENT (fns);
4853 if (copy_fn_p (fn) == 0)
4856 else if (copy_fn_p (fn) <= 0)
4859 if (!TYPE_NOTHROW_P (TREE_TYPE (fn)))
4866 /* Actually evaluates the trait. */
4869 trait_expr_value (cp_trait_kind kind, tree type1, tree type2)
4871 enum tree_code type_code1;
4874 type_code1 = TREE_CODE (type1);
4878 case CPTK_HAS_NOTHROW_ASSIGN:
4879 type1 = strip_array_types (type1);
4880 return (!CP_TYPE_CONST_P (type1) && type_code1 != REFERENCE_TYPE
4881 && (trait_expr_value (CPTK_HAS_TRIVIAL_ASSIGN, type1, type2)
4882 || (CLASS_TYPE_P (type1)
4883 && classtype_has_nothrow_assign_or_copy_p (type1,
4886 case CPTK_HAS_TRIVIAL_ASSIGN:
4887 /* ??? The standard seems to be missing the "or array of such a class
4888 type" wording for this trait. */
4889 type1 = strip_array_types (type1);
4890 return (!CP_TYPE_CONST_P (type1) && type_code1 != REFERENCE_TYPE
4891 && (trivial_type_p (type1)
4892 || (CLASS_TYPE_P (type1)
4893 && TYPE_HAS_TRIVIAL_ASSIGN_REF (type1))));
4895 case CPTK_HAS_NOTHROW_CONSTRUCTOR:
4896 type1 = strip_array_types (type1);
4897 return (trait_expr_value (CPTK_HAS_TRIVIAL_CONSTRUCTOR, type1, type2)
4898 || (CLASS_TYPE_P (type1)
4899 && (t = locate_ctor (type1, NULL))
4900 && TYPE_NOTHROW_P (TREE_TYPE (t))));
4902 case CPTK_HAS_TRIVIAL_CONSTRUCTOR:
4903 type1 = strip_array_types (type1);
4904 return (trivial_type_p (type1)
4905 || (CLASS_TYPE_P (type1) && TYPE_HAS_TRIVIAL_DFLT (type1)));
4907 case CPTK_HAS_NOTHROW_COPY:
4908 type1 = strip_array_types (type1);
4909 return (trait_expr_value (CPTK_HAS_TRIVIAL_COPY, type1, type2)
4910 || (CLASS_TYPE_P (type1)
4911 && classtype_has_nothrow_assign_or_copy_p (type1, false)));
4913 case CPTK_HAS_TRIVIAL_COPY:
4914 /* ??? The standard seems to be missing the "or array of such a class
4915 type" wording for this trait. */
4916 type1 = strip_array_types (type1);
4917 return (trivial_type_p (type1) || type_code1 == REFERENCE_TYPE
4918 || (CLASS_TYPE_P (type1) && TYPE_HAS_TRIVIAL_INIT_REF (type1)));
4920 case CPTK_HAS_TRIVIAL_DESTRUCTOR:
4921 type1 = strip_array_types (type1);
4922 return (trivial_type_p (type1) || type_code1 == REFERENCE_TYPE
4923 || (CLASS_TYPE_P (type1)
4924 && TYPE_HAS_TRIVIAL_DESTRUCTOR (type1)));
4926 case CPTK_HAS_VIRTUAL_DESTRUCTOR:
4927 return (CLASS_TYPE_P (type1)
4928 && (t = locate_dtor (type1, NULL)) && DECL_VIRTUAL_P (t));
4930 case CPTK_IS_ABSTRACT:
4931 return (CLASS_TYPE_P (type1) && CLASSTYPE_PURE_VIRTUALS (type1));
4933 case CPTK_IS_BASE_OF:
4934 return (NON_UNION_CLASS_TYPE_P (type1) && NON_UNION_CLASS_TYPE_P (type2)
4935 && DERIVED_FROM_P (type1, type2));
4938 return (NON_UNION_CLASS_TYPE_P (type1));
4940 case CPTK_IS_CONVERTIBLE_TO:
4945 return (NON_UNION_CLASS_TYPE_P (type1) && CLASSTYPE_EMPTY_P (type1));
4948 return (type_code1 == ENUMERAL_TYPE);
4951 return (pod_type_p (type1));
4953 case CPTK_IS_POLYMORPHIC:
4954 return (CLASS_TYPE_P (type1) && TYPE_POLYMORPHIC_P (type1));
4956 case CPTK_IS_STD_LAYOUT:
4957 return (std_layout_type_p (type1));
4959 case CPTK_IS_TRIVIAL:
4960 return (trivial_type_p (type1));
4963 return (type_code1 == UNION_TYPE);
4971 /* Returns true if TYPE is a complete type, an array of unknown bound,
4972 or (possibly cv-qualified) void, returns false otherwise. */
4975 check_trait_type (tree type)
4977 if (COMPLETE_TYPE_P (type))
4980 if (TREE_CODE (type) == ARRAY_TYPE && !TYPE_DOMAIN (type))
4983 if (VOID_TYPE_P (type))
4989 /* Process a trait expression. */
4992 finish_trait_expr (cp_trait_kind kind, tree type1, tree type2)
4994 gcc_assert (kind == CPTK_HAS_NOTHROW_ASSIGN
4995 || kind == CPTK_HAS_NOTHROW_CONSTRUCTOR
4996 || kind == CPTK_HAS_NOTHROW_COPY
4997 || kind == CPTK_HAS_TRIVIAL_ASSIGN
4998 || kind == CPTK_HAS_TRIVIAL_CONSTRUCTOR
4999 || kind == CPTK_HAS_TRIVIAL_COPY
5000 || kind == CPTK_HAS_TRIVIAL_DESTRUCTOR
5001 || kind == CPTK_HAS_VIRTUAL_DESTRUCTOR
5002 || kind == CPTK_IS_ABSTRACT
5003 || kind == CPTK_IS_BASE_OF
5004 || kind == CPTK_IS_CLASS
5005 || kind == CPTK_IS_CONVERTIBLE_TO
5006 || kind == CPTK_IS_EMPTY
5007 || kind == CPTK_IS_ENUM
5008 || kind == CPTK_IS_POD
5009 || kind == CPTK_IS_POLYMORPHIC
5010 || kind == CPTK_IS_STD_LAYOUT
5011 || kind == CPTK_IS_TRIVIAL
5012 || kind == CPTK_IS_UNION);
5014 if (kind == CPTK_IS_CONVERTIBLE_TO)
5016 sorry ("__is_convertible_to");
5017 return error_mark_node;
5020 if (type1 == error_mark_node
5021 || ((kind == CPTK_IS_BASE_OF || kind == CPTK_IS_CONVERTIBLE_TO)
5022 && type2 == error_mark_node))
5023 return error_mark_node;
5025 if (processing_template_decl)
5027 tree trait_expr = make_node (TRAIT_EXPR);
5028 TREE_TYPE (trait_expr) = boolean_type_node;
5029 TRAIT_EXPR_TYPE1 (trait_expr) = type1;
5030 TRAIT_EXPR_TYPE2 (trait_expr) = type2;
5031 TRAIT_EXPR_KIND (trait_expr) = kind;
5035 complete_type (type1);
5037 complete_type (type2);
5041 case CPTK_HAS_NOTHROW_ASSIGN:
5042 case CPTK_HAS_TRIVIAL_ASSIGN:
5043 case CPTK_HAS_NOTHROW_CONSTRUCTOR:
5044 case CPTK_HAS_TRIVIAL_CONSTRUCTOR:
5045 case CPTK_HAS_NOTHROW_COPY:
5046 case CPTK_HAS_TRIVIAL_COPY:
5047 case CPTK_HAS_TRIVIAL_DESTRUCTOR:
5048 case CPTK_HAS_VIRTUAL_DESTRUCTOR:
5049 case CPTK_IS_ABSTRACT:
5052 case CPTK_IS_POLYMORPHIC:
5053 case CPTK_IS_STD_LAYOUT:
5054 case CPTK_IS_TRIVIAL:
5055 if (!check_trait_type (type1))
5057 error ("incomplete type %qT not allowed", type1);
5058 return error_mark_node;
5062 case CPTK_IS_BASE_OF:
5063 if (NON_UNION_CLASS_TYPE_P (type1) && NON_UNION_CLASS_TYPE_P (type2)
5064 && !same_type_ignoring_top_level_qualifiers_p (type1, type2)
5065 && !COMPLETE_TYPE_P (type2))
5067 error ("incomplete type %qT not allowed", type2);
5068 return error_mark_node;
5077 case CPTK_IS_CONVERTIBLE_TO:
5082 return (trait_expr_value (kind, type1, type2)
5083 ? boolean_true_node : boolean_false_node);
5086 /* Do-nothing variants of functions to handle pragma FLOAT_CONST_DECIMAL64,
5087 which is ignored for C++. */
5090 set_float_const_decimal64 (void)
5095 clear_float_const_decimal64 (void)
5100 float_const_decimal64_p (void)
5105 #include "gt-cp-semantics.h"