import quincy beta 17.1.0

[ceph.git] / ceph / src / boost / libs / asio / test / properties / cpp11 / can_require_member.cpp

diff --git a/ceph/src/boost/libs/asio/test/properties/cpp11/can_require_member.cpp b/ceph/src/boost/libs/asio/test/properties/cpp11/can_require_member.cpp
new file mode 100644 (file)
index 0000000..efa531a
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+++ b/ceph/src/boost/libs/asio/test/properties/cpp11/can_require_member.cpp
@@ -0,0 +1,50 @@
+//
+// cpp11/can_require_member.cpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2020 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 <boost/asio/require.hpp>
+#include <cassert>
+
+template <int>
+struct prop
+{
+  static constexpr bool is_requirable = true;
+};
+
+template <int>
+struct object
+{
+  template <int N>
+  constexpr object<N> require(prop<N>) const
+  {
+    return object<N>();
+  }
+};
+
+namespace boost {
+namespace asio {
+
+template<int N, int M>
+struct is_applicable_property<object<N>, prop<M> >
+{
+  static constexpr bool value = true;
+};
+
+} // namespace asio
+} // namespace boost
+
+int main()
+{
+  static_assert(boost::asio::can_require<object<1>, prop<2>>::value, "");
+  static_assert(boost::asio::can_require<object<1>, prop<2>, prop<3>>::value, "");
+  static_assert(boost::asio::can_require<object<1>, prop<2>, prop<3>, prop<4>>::value, "");
+  static_assert(boost::asio::can_require<const object<1>, prop<2>>::value, "");
+  static_assert(boost::asio::can_require<const object<1>, prop<2>, prop<3>>::value, "");
+  static_assert(boost::asio::can_require<const object<1>, prop<2>, prop<3>, prop<4>>::value, "");
+}