vendor/libc++/libc++-release_370-r246257

1 files changed, 67 insertions, 0 deletions

diff --git a/test/std/experimental/optional/optional.object/optional.object.ctor/default.pass.cpp b/test/std/experimental/optional/optional.object/optional.object.ctor/default.pass.cpp
new file mode 100644
index 0000000000000..6a1763de22bd6
--- /dev/null
+++ b/test/std/experimental/optional/optional.object/optional.object.ctor/default.pass.cpp
@@ -0,0 +1,67 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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>
+
+// constexpr optional() noexcept;
+
+#include <experimental/optional>
+#include <type_traits>
+#include <cassert>
+
+#if _LIBCPP_STD_VER > 11
+
+using std::experimental::optional;
+
+template <class Opt>
+void
+test_constexpr()
+{
+    static_assert(std::is_nothrow_default_constructible<Opt>::value, "");
+    constexpr Opt opt;
+    static_assert(static_cast<bool>(opt) == false, "");
+
+    struct test_constexpr_ctor
+        : public Opt
+    {
+        constexpr test_constexpr_ctor() {}
+    };
+
+}
+
+template <class Opt>
+void
+test()
+{
+    static_assert(std::is_nothrow_default_constructible<Opt>::value, "");
+    Opt opt;
+    assert(static_cast<bool>(opt) == false);
+
+    struct test_constexpr_ctor
+        : public Opt
+    {
+        constexpr test_constexpr_ctor() {}
+    };
+}
+
+struct X
+{
+    X();
+};
+
+#endif  // _LIBCPP_STD_VER > 11
+
+int main()
+{
+#if _LIBCPP_STD_VER > 11
+    test_constexpr<optional<int>>();
+    test_constexpr<optional<int*>>();
+    test<optional<X>>();
+#endif  // _LIBCPP_STD_VER > 11
+}