1 files changed, 36 insertions, 0 deletions
diff --git a/test/SemaTemplate/instantiate-var-template.cpp b/test/SemaTemplate/instantiate-var-template.cpp
new file mode 100644
index 000000000000..bd7c43334f7d
--- /dev/null
+++ b/test/SemaTemplate/instantiate-var-template.cpp
@@ -0,0 +1,36 @@
+// RUN: %clang_cc1 -verify -std=c++1y %s
+
+namespace PR17846 {
+  template <typename T> constexpr T pi = T(3.14);
+  template <typename T> constexpr T tau = 2 * pi<T>;
+  constexpr double tau_double = tau<double>;
+  static_assert(tau_double == 6.28, "");
+}
+
+namespace PR17848 {
+  template<typename T> constexpr T var = 12345;
+  template<typename T> constexpr T f() { return var<T>; }
+  constexpr int k = f<int>();
+  static_assert(k == 12345, "");
+}
+
+namespace NonDependent {
+  template<typename T> constexpr T a = 0;
+  template<typename T> constexpr T b = a<int>;
+  static_assert(b<int> == 0, "");
+}
+
+namespace InstantiationDependent {
+  int f(int);
+  void f(char);
+
+  template<int> constexpr int a = 1;
+  template<typename T> constexpr T b = a<sizeof(sizeof(f(T())))>; // expected-error {{invalid application of 'sizeof' to an incomplete type 'void'}}
+
+  static_assert(b<int> == 1, "");
+  static_assert(b<char> == 1, ""); // expected-note {{in instantiation of}} expected-error {{not an integral constant}}
+
+  template<typename T> void f() {
+    static_assert(a<sizeof(sizeof(f(T())))> == 0, ""); // expected-error {{static_assert failed}}
+  }
+}