1 files changed, 98 insertions, 0 deletions
diff --git a/clang/test/CXX/dcl.dcl/basic.namespace/namespace.udecl/p8.cpp b/clang/test/CXX/dcl.dcl/basic.namespace/namespace.udecl/p8.cpp
new file mode 100644
index 0000000..4660971
--- /dev/null
+++ b/clang/test/CXX/dcl.dcl/basic.namespace/namespace.udecl/p8.cpp
@@ -0,0 +1,98 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+
+struct Opaque0 {};
+struct Opaque1 {};
+
+// Redeclarations are okay in a namespace.
+namespace test0 {
+  namespace ns {
+    void foo(Opaque0); // expected-note 2 {{candidate function}}
+  }
+
+  using ns::foo;
+  using ns::foo;
+
+  void test0() {
+    foo(Opaque1()); // expected-error {{no matching function for call}}
+  }
+
+  namespace ns {
+    void foo(Opaque1);
+  }
+
+  void test1() {
+    foo(Opaque1()); // expected-error {{no matching function for call}}
+  }
+
+  using ns::foo;
+
+  void test2() {
+    foo(Opaque1());
+  }
+
+  using ns::foo;
+}
+
+// Make sure we handle transparent contexts the same way.
+namespace test1 {
+  namespace ns {
+    void foo(Opaque0); // expected-note 2 {{candidate function}}
+  }
+
+  extern "C++" {
+    using ns::foo;
+  }
+
+  void test0() {
+    foo(Opaque1()); // expected-error {{no matching function for call}}
+  }
+
+  namespace ns {
+    void foo(Opaque1);
+  }
+
+  void test1() {
+    foo(Opaque1()); // expected-error {{no matching function for call}}
+  }
+
+  extern "C++" {
+    using ns::foo;
+  }
+
+  void test2() {
+    foo(Opaque1());
+  }
+}
+
+// Make sure we detect invalid redeclarations that can't be detected
+// until template instantiation.
+namespace test2 {
+  template <class T> struct Base {
+    typedef Base type;
+    void foo();
+  };
+
+  template <class T> struct Derived : Base<T> {
+    // These are invalid redeclarations, detectable only after
+    // instantiation.
+    using Base<T>::foo; // expected-note {{previous using decl}}
+    using Base<T>::type::foo; //expected-error {{redeclaration of using decl}}
+  };
+
+  template struct Derived<int>; // expected-note {{in instantiation of template class}}
+}
+
+// Redeclarations are okay in a function.
+namespace test3 {
+  namespace N {
+    int f(int);
+    typedef int type;
+  }
+
+  void g() {
+    using N::f;
+    using N::f;
+    using N::type;
+    using N::type;
+  }
+}