Check in LLVM r95781.
diff --git a/test/Parser/cxx-using-directive.cpp b/test/Parser/cxx-using-directive.cpp
new file mode 100644
index 0000000..1e91899
--- /dev/null
+++ b/test/Parser/cxx-using-directive.cpp
@@ -0,0 +1,40 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+
+class A {};
+
+namespace B {
+ namespace A {}
+ using namespace A ;
+}
+
+namespace C {}
+
+namespace D {
+
+ class C {
+
+ using namespace B ; // expected-error{{not allowed}}
+ };
+
+ namespace B {}
+
+ using namespace C ;
+ using namespace B::A ; // expected-error{{expected namespace name}}
+ //FIXME: would be nice to note, that A is not member of D::B
+ using namespace ::B::A ;
+ using namespace ::D::C ; // expected-error{{expected namespace name}}
+}
+
+using namespace ! ; // expected-error{{expected namespace name}}
+using namespace A ; // expected-error{{expected namespace name}}
+using namespace ::A // expected-error{{expected namespace name}} \
+ // expected-error{{expected ';' after namespace name}}
+ B ;
+
+void test_nslookup() {
+ int B;
+ class C;
+ using namespace B;
+ using namespace C;
+}
+