Add Forgotten test for: Fix template parameter default args missed if redecled

Addendum to differential revision: https://reviews.llvm.org/D39127

llvm-svn: 316437

clang/test/SemaCXX/template-default-param-through-using.cpp

@@ -0,0 +1,33 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+// expected-no-diagnostics
+namespace llvm {
+  template<typename T > struct StringSet;
+  template<int I > struct Int;
+  template <typename Inner, template <typename> class Outer>
+    struct TemplTempl;
+}
+
+namespace lld {
+  using llvm::StringSet;
+  using llvm::Int;
+  using llvm::TemplTempl;
+};
+
+namespace llvm {
+  template<typename T > struct StringSet;
+}
+
+template<typename T> struct Temp{};
+
+namespace llvm {
+  template<typename T = int> struct StringSet{};
+  template<int I = 5> struct Int{};
+  template <typename Inner, template <typename> class Outer = Temp>
+    struct TemplTempl{};
+};
+
+namespace lld {
+  StringSet<> s;
+  Int<> i;
+  TemplTempl<int> tt;
+}