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-rw-r--r--3rdparty/asio/src/tests/properties/cpp14/can_prefer_not_applicable_member_prefer.cpp38
1 files changed, 38 insertions, 0 deletions
diff --git a/3rdparty/asio/src/tests/properties/cpp14/can_prefer_not_applicable_member_prefer.cpp b/3rdparty/asio/src/tests/properties/cpp14/can_prefer_not_applicable_member_prefer.cpp
new file mode 100644
index 00000000000..6caced35383
--- /dev/null
+++ b/3rdparty/asio/src/tests/properties/cpp14/can_prefer_not_applicable_member_prefer.cpp
@@ -0,0 +1,38 @@
+//
+// cpp14/can_prefer_not_applicable_member_prefer.cpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2021 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#include "asio/prefer.hpp"
+#include <cassert>
+
+template <int>
+struct prop
+{
+ static constexpr bool is_preferable = true;
+};
+
+template <int>
+struct object
+{
+ template <int N>
+ constexpr object<N> prefer(prop<N>) const
+ {
+ return object<N>();
+ }
+};
+
+int main()
+{
+ static_assert(!asio::can_prefer_v<object<1>, prop<2>>, "");
+ static_assert(!asio::can_prefer_v<object<1>, prop<2>, prop<3>>, "");
+ static_assert(!asio::can_prefer_v<object<1>, prop<2>, prop<3>, prop<4>>, "");
+ static_assert(!asio::can_prefer_v<const object<1>, prop<2>>, "");
+ static_assert(!asio::can_prefer_v<const object<1>, prop<2>, prop<3>>, "");
+ static_assert(!asio::can_prefer_v<const object<1>, prop<2>, prop<3>, prop<4>>, "");
+}