DR 799

	DR 799
	* typeck.c (build_reinterpret_cast_1): reinterpret_cast to the
	same scalar type is an rvalue.

From-SVN: r217276

gcc/cp/ChangeLog

 2014-11-09  Jason Merrill  <jason@redhat.com>
 
+	DR 799
+	* typeck.c (build_reinterpret_cast_1): reinterpret_cast to the
+	same scalar type is an rvalue.
+
 	DR 2007
 	* call.c (build_new_op_1): Don't do non-class lookup for =, -> or [].
 

gcc/cp/typeck.c

@@ -6898,7 +6898,7 @@ build_reinterpret_cast_1 (tree type, tree expr, bool c_cast_p,
 	    || TYPE_PTR_OR_PTRMEM_P (type))
 	   && same_type_p (type, intype))
     /* DR 799 */
-    return fold_if_not_in_template (build_nop (type, expr));
+    return rvalue (expr);
   else if ((TYPE_PTRFN_P (type) && TYPE_PTRFN_P (intype))
 	   || (TYPE_PTRMEMFUNC_P (type) && TYPE_PTRMEMFUNC_P (intype)))
     return fold_if_not_in_template (build_nop (type, expr));

gcc/testsuite/g++.dg/conversion/reinterpret1.C

@@ -3,4 +3,4 @@
 struct Y { Y(int &); };
 
 int v;
-Y y1(reinterpret_cast<int>(v));
+Y y1(reinterpret_cast<int>(v));  // { dg-error "" }