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Diffstat (limited to '3rdparty/asio/src/tests/properties/cpp03/prefer_unsupported.cpp')
-rw-r--r--3rdparty/asio/src/tests/properties/cpp03/prefer_unsupported.cpp46
1 files changed, 46 insertions, 0 deletions
diff --git a/3rdparty/asio/src/tests/properties/cpp03/prefer_unsupported.cpp b/3rdparty/asio/src/tests/properties/cpp03/prefer_unsupported.cpp
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index 00000000000..25e0f308a4a
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+++ b/3rdparty/asio/src/tests/properties/cpp03/prefer_unsupported.cpp
@@ -0,0 +1,46 @@
+//
+// cpp03/prefer_unsupported.cpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2024 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 const bool is_preferable = true;
+};
+
+template <int>
+struct object
+{
+};
+
+namespace asio {
+
+template<int N, int M>
+struct is_applicable_property<object<N>, prop<M> >
+{
+ static const bool value = true;
+};
+
+} // namespace asio
+
+int main()
+{
+ object<1> o1 = {};
+ const object<1>& o2 = asio::prefer(o1, prop<1>());
+ assert(&o1 == &o2);
+ (void)o2;
+
+ const object<1> o3 = {};
+ const object<1>& o4 = asio::prefer(o3, prop<1>());
+ assert(&o3 == &o4);
+ (void)o4;
+}