re PR c++/58255 ([C++11] explicit delegating constructor with no arguments wrongly rejected)

/cp
2013-08-28  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/58255
	* init.c (build_aggr_init): When init == void_type_node do not
	set LOOKUP_ONLYCONVERTING.

/testsuite
2013-08-28  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/58255
	* g++.dg/cpp0x/dc7.C: New.

From-SVN: r202061

gcc/cp/ChangeLog

+2013-08-28  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/58255
+	* init.c (build_aggr_init): When init == void_type_node do not
+	set LOOKUP_ONLYCONVERTING.
+
 2013-08-27  Caroline Tice  <cmtice@google.com>
 
 	* vtable-class-hierarchy.c: Remove unnecessary include statements.

gcc/cp/init.c

@@ -1464,7 +1464,8 @@ build_aggr_init (tree exp, tree init, int flags, tsubst_flags_t complain)
   TREE_READONLY (exp) = 0;
   TREE_THIS_VOLATILE (exp) = 0;
 
-  if (init && TREE_CODE (init) != TREE_LIST
+  if (init && init != void_type_node
+      && TREE_CODE (init) != TREE_LIST
       && !(TREE_CODE (init) == TARGET_EXPR
 	   && TARGET_EXPR_DIRECT_INIT_P (init))
       && !(BRACE_ENCLOSED_INITIALIZER_P (init)

gcc/testsuite/ChangeLog

+2013-08-28  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/58255
+	* g++.dg/cpp0x/dc7.C: New.
+
 2013-08-28  Jakub Jelinek  <jakub@redhat.com>
 
 	PR middle-end/58257

gcc/testsuite/g++.dg/cpp0x/dc7.C

+// PR c++/58255
+// { dg-do compile { target c++11 } }
+
+struct A {
+  explicit A() { }
+  A(int x) : A() { }
+};