Implement N3672, optional<T>.

llvm-svn: 189772

1 files changed, 42 insertions, 0 deletions

diff --git a/libcxx/test/utilities/optional/optional.comp_with_t/equal.pass.cpp b/libcxx/test/utilities/optional/optional.comp_with_t/equal.pass.cpp
new file mode 100644
index 00000000000..b1865fafe74
--- /dev/null
+++ b/libcxx/test/utilities/optional/optional.comp_with_t/equal.pass.cpp
@@ -0,0 +1,42 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <optional>
+
+// template <class T> constexpr bool operator==(const optional<T>& x, const T& v);
+// template <class T> constexpr bool operator==(const T& v, const optional<T>& x);
+
+#include <optional>
+
+int main()
+{
+#if _LIBCPP_STD_VER > 11
+    {
+    typedef int T;
+    typedef std::optional<T> O;
+    
+    constexpr T val(2);
+    constexpr O o1;     // disengaged
+    constexpr O o2{1};  // engaged
+    constexpr O o3{val};  // engaged
+
+    static_assert ( !(o1 == 1), "" );
+    static_assert (   o2 == 1,  "" );
+    static_assert ( !(o3 == 1), "" );
+    static_assert (   o3 == 2 , "" );
+    static_assert (   o3 == val, "" );
+        
+    static_assert ( !(1 == o1), "" );
+    static_assert (   1 == o2,  "" );
+    static_assert ( !(1 == o3), "" );
+    static_assert (   2 == o3 , "" );
+    static_assert ( val == o3 , "" );
+    }
+#endif
+}