Implement N3672, optional<T>.
llvm-svn: 189772
diff --git a/libcxx/test/utilities/optional/optional.hash/hash.pass.cpp b/libcxx/test/utilities/optional/optional.hash/hash.pass.cpp
new file mode 100644
index 0000000..406632a
--- /dev/null
+++ b/libcxx/test/utilities/optional/optional.hash/hash.pass.cpp
@@ -0,0 +1,48 @@
+//===----------------------------------------------------------------------===//
+//
+// 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> struct hash<optional<T>>;
+
+#include <optional>
+#include <string>
+#include <memory>
+#include <cassert>
+
+#if _LIBCPP_STD_VER > 11
+
+#endif // _LIBCPP_STD_VER > 11
+
+int main()
+{
+#if _LIBCPP_STD_VER > 11
+ {
+ typedef int T;
+ std::optional<T> opt;
+ assert(std::hash<std::optional<T>>{}(opt) == 0);
+ opt = 2;
+ assert(std::hash<std::optional<T>>{}(opt) == std::hash<T>{}(*opt));
+ }
+ {
+ typedef std::string T;
+ std::optional<T> opt;
+ assert(std::hash<std::optional<T>>{}(opt) == 0);
+ opt = std::string("123");
+ assert(std::hash<std::optional<T>>{}(opt) == std::hash<T>{}(*opt));
+ }
+ {
+ typedef std::unique_ptr<int> T;
+ std::optional<T> opt;
+ assert(std::hash<std::optional<T>>{}(opt) == 0);
+ opt = std::unique_ptr<int>(new int(3));
+ assert(std::hash<std::optional<T>>{}(opt) == std::hash<T>{}(*opt));
+ }
+#endif // _LIBCPP_STD_VER > 11
+}