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Diffstat (limited to '3rdparty/asio/src/tests/properties/cpp03/require_concept_free.cpp')
-rw-r--r-- | 3rdparty/asio/src/tests/properties/cpp03/require_concept_free.cpp | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/3rdparty/asio/src/tests/properties/cpp03/require_concept_free.cpp b/3rdparty/asio/src/tests/properties/cpp03/require_concept_free.cpp new file mode 100644 index 00000000000..6cccdd2774e --- /dev/null +++ b/3rdparty/asio/src/tests/properties/cpp03/require_concept_free.cpp @@ -0,0 +1,60 @@ +// +// cpp03/require_concept_free.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/require_concept.hpp" +#include <cassert> + +template <int> +struct prop +{ + static const bool is_requirable_concept = true; +}; + +template <int> +struct object +{ + template <int N> + friend object<N> require_concept(const object&, prop<N>) + { + return object<N>(); + } +}; + +namespace asio { + +template<int N, int M> +struct is_applicable_property<object<N>, prop<M> > +{ + static const bool value = true; +}; + +namespace traits { + +template<int N, int M> +struct require_concept_free<object<N>, prop<M> > +{ + static const bool is_valid = true; + static const bool is_noexcept = true; + typedef object<M> result_type; +}; + +} // namespace traits +} // namespace asio + +int main() +{ + object<1> o1 = {}; + object<2> o2 = asio::require_concept(o1, prop<2>()); + (void)o2; + + const object<1> o3 = {}; + object<2> o4 = asio::require_concept(o3, prop<2>()); + (void)o4; +} |