re PR c++/49528 (g++ fails to destroy temporary object when subobject is used to…

re PR c++/49528 (g++ fails to destroy temporary object when subobject is used to initialize a reference)

	PR c++/49528
	* semantics.c (potential_constant_expression_1): Check
	for non-literality rather than cleanup.
	(cxx_eval_constant_expression): Likewise.

From-SVN: r175417

gcc/cp/ChangeLog

 2011-06-26  Jason Merrill  <jason@redhat.com>
 
 	PR c++/49528
+	* semantics.c (potential_constant_expression_1): Check
+	for non-literality rather than cleanup.
+	(cxx_eval_constant_expression): Likewise.
+
+	PR c++/49528
 	* semantics.c (potential_constant_expression_1): A TARGET_EXPR
 	with a cleanup isn't constant.
 	(cxx_eval_constant_expression): Likewise.

gcc/cp/semantics.c

@@ -7020,11 +7020,10 @@ cxx_eval_constant_expression (const constexpr_call *call, tree t,
       break;
 
     case TARGET_EXPR:
-      /* A cleanup isn't constant.  */
-      if (TARGET_EXPR_CLEANUP (t))
+      if (!literal_type_p (TREE_TYPE (t)))
 	{
 	  if (!allow_non_constant)
-	    error ("temporary of type %qT needing destruction in a "
+	    error ("temporary of non-literal type %qT in a "
 		   "constant expression", TREE_TYPE (t));
 	  *non_constant_p = true;
 	  break;
@@ -7851,11 +7850,10 @@ potential_constant_expression_1 (tree t, bool want_rval, tsubst_flags_t flags)
 					      want_rval, flags);
 
     case TARGET_EXPR:
-      /* A cleanup isn't constant.  */
-      if (TARGET_EXPR_CLEANUP (t))
+      if (!literal_type_p (TREE_TYPE (t)))
 	{
 	  if (flags & tf_error)
-	    error ("temporary of type %qT needing destruction in a "
+	    error ("temporary of non-literal type %qT in a "
 		   "constant expression", TREE_TYPE (t));
 	  return false;
 	}

gcc/testsuite/ChangeLog

 2011-06-26  Jason Merrill  <jason@redhat.com>
 
+	* g++.dg/cpp0x/constexpr-cleanup.C: Tweak error message.
+
 	PR c++/49528
 	* g++.dg/init/ref19.C: New.
 	* g++.dg/cpp0x/constexpr-cleanup.C: New.

gcc/testsuite/g++.dg/cpp0x/constexpr-cleanup.C

@@ -6,4 +6,4 @@ struct A
   ~A();
 };
 
-constexpr int i = A().i;	// { dg-error "destruction" }
+constexpr int i = A().i;	// { dg-error "non-literal" }