1 files changed, 51 insertions, 0 deletions
diff --git a/libcxx/test/std/diagnostics/syserr/is_error_condition_enum.pass.cpp b/libcxx/test/std/diagnostics/syserr/is_error_condition_enum.pass.cpp
new file mode 100644
index 000000000000..0114cbd9890b
--- /dev/null
+++ b/libcxx/test/std/diagnostics/syserr/is_error_condition_enum.pass.cpp
@@ -0,0 +1,51 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++98, c++03, c++11, c++14
+
+// <system_error>
+
+// template <class T> constexpr bool is_error_condition_enum_v;
+
+#include <system_error>
+#include <type_traits>
+#include "test_macros.h"
+
+template <bool Expected, class T>
+void
+test()
+{
+    static_assert((std::is_error_condition_enum<T>::value == Expected), "");
+#if TEST_STD_VER > 14
+    static_assert((std::is_error_condition_enum_v<T>        == Expected), "");
+#endif
+}
+
+class A {
+	A();
+	operator std::error_condition () const { return std::error_condition(); }
+};
+
+// Specialize the template for my class
+namespace std
+{
+  template <>
+  struct is_error_condition_enum<A> : public std::true_type {};
+}
+
+	
+int main()
+{
+    test<false, void>();
+    test<false, int>();
+    test<false, std::nullptr_t>();
+    test<false, std::string>();
+    
+    test<true, A>();
+}