re PR c++/56450 (ICE with SFINAE when detecting non-static member variable)

/cp
2013-04-28  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/56450
	* semantics.c (finish_decltype_type): Handle COMPOUND_EXPR.

/testsuite
2013-04-28  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/56450
	* g++.dg/cpp0x/decltype52.C: New.

From-SVN: r198381

gcc/cp/ChangeLog

+2013-04-28  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/56450
+	* semantics.c (finish_decltype_type): Handle COMPOUND_EXPR.
+
 2013-04-26  Jakub Jelinek  <jakub@redhat.com>
 
 	* error.c (cp_print_error_function): Adjust file_name_as_prefix

gcc/cp/semantics.c

@@ -5398,6 +5398,7 @@ finish_decltype_type (tree expr, bool id_expression_or_member_access_p,
           break;
 
         case COMPONENT_REF:
+	case COMPOUND_EXPR:
 	  mark_type_use (expr);
           type = is_bitfield_expr_with_lowered_type (expr);
           if (!type)

gcc/testsuite/ChangeLog

+2013-04-28  Paolo Carlini  <paolo.carlini@oracle.com>
+
+	PR c++/56450
+	* g++.dg/cpp0x/decltype52.C: New.
+
 2013-04-28  Jakub Jelinek  <jakub@redhat.com>
 
 	N3472 binary constants

gcc/testsuite/g++.dg/cpp0x/decltype52.C

+// PR c++/56450
+// { dg-do compile { target c++11 } }
+
+template<typename T>
+T&& declval();
+
+template<typename, typename>
+struct is_same
+{ static constexpr bool value = false; };
+
+template<typename T>
+struct is_same<T, T>
+{ static constexpr bool value = true; };
+
+struct A { static const int dummy = 0; };
+
+static_assert(is_same<decltype(declval<A>().dummy), const int>::value, "");
+static_assert(!is_same<decltype(declval<A>().dummy), const int&>::value, "");