re PR c++/46103 ([c++0x] moving from std::array copies the elements)

	PR c++/46103
	* init.c (build_vec_init): Handle memberwise move.

From-SVN: r165849

gcc/cp/ChangeLog

+2010-10-22  Jason Merrill  <jason@redhat.com>
+
+	PR c++/46103
+	* init.c (build_vec_init): Handle memberwise move.
+
 2010-10-21  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR c++/46117

gcc/cp/init.c

@@ -2849,6 +2849,7 @@ build_vec_init (tree base, tree maxindex, tree init,
   tree try_block = NULL_TREE;
   int num_initialized_elts = 0;
   bool is_global;
+  bool xvalue = false;
 
   if (TREE_CODE (atype) == ARRAY_TYPE && TYPE_DOMAIN (atype))
     maxindex = array_type_nelts (atype);
@@ -2939,6 +2940,8 @@ build_vec_init (tree base, tree maxindex, tree init,
      checking.  Evaluate the initializer before entering the try block.  */
   if (from_array && init && TREE_CODE (init) != CONSTRUCTOR)
     {
+      if (lvalue_kind (init) & clk_rvalueref)
+	xvalue = true;
       base2 = decay_conversion (init);
       itype = TREE_TYPE (base2);
       base2 = get_temp_regvar (itype, base2);
@@ -3033,7 +3036,11 @@ build_vec_init (tree base, tree maxindex, tree init,
 	  tree from;
 
 	  if (base2)
-	    from = build1 (INDIRECT_REF, itype, base2);
+	    {
+	      from = build1 (INDIRECT_REF, itype, base2);
+	      if (xvalue)
+		from = move (from);
+	    }
 	  else
 	    from = NULL_TREE;
 

gcc/testsuite/ChangeLog

+2010-10-22  Jason Merrill  <jason@redhat.com>
+
+	PR c++/46103
+	* g++.dg/cpp0x/implicit10.C: New.
+
 2010-10-22  Uros Bizjak  <ubizjak@gmail.com>
 
 	PR target/46098

gcc/testsuite/g++.dg/cpp0x/implicit10.C

+// PR c++/46103
+// { dg-options -std=c++0x }
+
+struct MoveOnly {
+  MoveOnly(const MoveOnly&) = delete;
+  MoveOnly(MoveOnly&&) { }
+  MoveOnly() = default;
+};
+
+struct A {
+  MoveOnly mo[1];
+  A() = default;
+  A(A&&) = default;
+};
+
+int main() {
+  A a;
+  A aa = static_cast<A&&>(a);
+}