1 files changed, 25 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/g++.dg/cpp0x/dependent1.C b/gcc-4.9/gcc/testsuite/g++.dg/cpp0x/dependent1.C
new file mode 100644
index 000000000..629b125f5
--- /dev/null
+++ b/gcc-4.9/gcc/testsuite/g++.dg/cpp0x/dependent1.C
@@ -0,0 +1,25 @@
+// PR c++/48319
+// { dg-do compile { target c++11 } }
+// We were failing to recognize declval<_Args1> as dependent.
+
+template<typename Tp> Tp declval() noexcept;
+
+template<typename _Tp>
+class __is_constructible_helper
+{
+  typedef char __one;
+  typedef struct { char __arr[2]; } __two;
+
+  template<typename _Tp1, typename... _Args1>
+  static decltype(_Tp1(declval<_Args1>()...), __one()) __test(int);
+
+  template<typename, typename...>
+  static __two __test(...);
+
+public:
+  static const bool __value = sizeof(__test<_Tp>(0)) == 1;
+};
+
+int main() {
+  return __is_constructible_helper<int>::__value;
+}