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-rw-r--r--3rdparty/asio/src/tests/properties/cpp03/can_query_not_applicable_free.cpp41
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diff --git a/3rdparty/asio/src/tests/properties/cpp03/can_query_not_applicable_free.cpp b/3rdparty/asio/src/tests/properties/cpp03/can_query_not_applicable_free.cpp
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index 00000000000..3a0344320f5
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+++ b/3rdparty/asio/src/tests/properties/cpp03/can_query_not_applicable_free.cpp
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+//
+// cpp03/can_query_not_applicable_free.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/query.hpp"
+#include <cassert>
+
+struct prop
+{
+};
+
+struct object
+{
+ friend int query(const object&, prop) { return 123; }
+};
+
+namespace asio {
+namespace traits {
+
+template<>
+struct query_free<object, prop>
+{
+ static const bool is_valid = true;
+ static const bool is_noexcept = true;
+ typedef int result_type;
+};
+
+} // namespace traits
+} // namespace asio
+
+int main()
+{
+ assert((!asio::can_query<object, prop>::value));
+ assert((!asio::can_query<const object, prop>::value));
+}