1 files changed, 43 insertions, 0 deletions
diff --git a/libcxx/test/std/utilities/variant/variant.variant/variant.assign/conv.pass.cpp b/libcxx/test/std/utilities/variant/variant.variant/variant.assign/conv.pass.cpp
new file mode 100644
index 00000000000..b16cf2cdd58
--- /dev/null
+++ b/libcxx/test/std/utilities/variant/variant.variant/variant.assign/conv.pass.cpp
@@ -0,0 +1,43 @@
+// -*- C++ -*-
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++98, c++03, c++11, c++14
+
+// <variant>
+
+// template <class ...Types> class variant;
+
+// template <class T>
+// variant& operator=(T&&) noexcept(see below);
+
+#include <variant>
+#include <string>
+#include <memory>
+
+#include "variant_test_helpers.hpp"
+
+int main(int, char**)
+{
+  static_assert(!std::is_assignable<std::variant<int, int>, int>::value, "");
+  static_assert(!std::is_assignable<std::variant<long, long long>, int>::value, "");
+  static_assert(std::is_assignable<std::variant<char>, int>::value == VariantAllowsNarrowingConversions, "");
+
+  static_assert(std::is_assignable<std::variant<std::string, float>, int>::value == VariantAllowsNarrowingConversions, "");
+  static_assert(std::is_assignable<std::variant<std::string, double>, int>::value == VariantAllowsNarrowingConversions, "");
+  static_assert(!std::is_assignable<std::variant<std::string, bool>, int>::value, "");
+
+  static_assert(!std::is_assignable<std::variant<int, bool>, decltype("meow")>::value, "");
+  static_assert(!std::is_assignable<std::variant<int, const bool>, decltype("meow")>::value, "");
+  static_assert(!std::is_assignable<std::variant<int, const volatile bool>, decltype("meow")>::value, "");
+
+  static_assert(!std::is_assignable<std::variant<bool>, std::true_type>::value, "");
+  static_assert(!std::is_assignable<std::variant<bool>, std::unique_ptr<char> >::value, "");
+  static_assert(!std::is_assignable<std::variant<bool>, decltype(nullptr)>::value, "");
+
+}