1 files changed, 74 insertions, 0 deletions
diff --git a/test/std/utilities/optional/optional.relops/equal.pass.cpp b/test/std/utilities/optional/optional.relops/equal.pass.cpp
new file mode 100644
index 000000000000..6650b6720a8e
--- /dev/null
+++ b/test/std/utilities/optional/optional.relops/equal.pass.cpp
@@ -0,0 +1,74 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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
+// <optional>
+
+// template <class T> constexpr bool operator==(const optional<T>& x, const optional<T>& y);
+
+#include <optional>
+#include <type_traits>
+#include <cassert>
+
+using std::optional;
+
+struct X
+{
+    int i_;
+
+    constexpr X(int i) : i_(i) {}
+};
+
+constexpr bool operator == ( const X &lhs, const X &rhs )
+    { return lhs.i_ == rhs.i_ ; }
+
+int main()
+{
+    {
+    typedef X T;
+    typedef optional<T> O;
+
+    constexpr O o1;     // disengaged
+    constexpr O o2;     // disengaged
+    constexpr O o3{1};  // engaged
+    constexpr O o4{2};  // engaged
+    constexpr O o5{1};  // engaged
+
+    static_assert (   o1 == o1 , "" );
+    static_assert (   o1 == o2 , "" );
+    static_assert ( !(o1 == o3), "" );
+    static_assert ( !(o1 == o4), "" );
+    static_assert ( !(o1 == o5), "" );
+
+    static_assert (   o2 == o1 , "" );
+    static_assert (   o2 == o2 , "" );
+    static_assert ( !(o2 == o3), "" );
+    static_assert ( !(o2 == o4), "" );
+    static_assert ( !(o2 == o5), "" );
+
+    static_assert ( !(o3 == o1), "" );
+    static_assert ( !(o3 == o2), "" );
+    static_assert (   o3 == o3 , "" );
+    static_assert ( !(o3 == o4), "" );
+    static_assert (   o3 == o5 , "" );
+
+    static_assert ( !(o4 == o1), "" );
+    static_assert ( !(o4 == o2), "" );
+    static_assert ( !(o4 == o3), "" );
+    static_assert (   o4 == o4 , "" );
+    static_assert ( !(o4 == o5), "" );
+
+    static_assert ( !(o5 == o1), "" );
+    static_assert ( !(o5 == o2), "" );
+    static_assert (   o5 == o3 , "" );
+    static_assert ( !(o5 == o4), "" );
+    static_assert (   o5 == o5 , "" );
+
+    }
+}