--- /dev/null
+//
+// cpp11/can_query_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/query.hpp>
+#include <cassert>
+
+struct prop
+{
+};
+
+struct object
+{
+ constexpr int query(prop) const { return 123; }
+};
+
+namespace boost {
+namespace asio {
+
+template<>
+struct is_applicable_property<object, prop>
+{
+ static constexpr bool value = true;
+};
+
+} // namespace asio
+} // namespace boost
+
+int main()
+{
+ static_assert(boost::asio::can_query<object, prop>::value, "");
+ static_assert(boost::asio::can_query<const object, prop>::value, "");
+}