62 lines
1.5 KiB
C++
62 lines
1.5 KiB
C++
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//
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// is_applicable_property.hpp
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2021 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef ASIO_IS_APPLICABLE_PROPERTY_HPP
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#define ASIO_IS_APPLICABLE_PROPERTY_HPP
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#if defined(_MSC_VER) && (_MSC_VER >= 1200)
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# pragma once
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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#include "asio/detail/config.hpp"
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#include "asio/detail/type_traits.hpp"
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namespace asio {
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namespace detail {
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template <typename T, typename Property, typename = void>
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struct is_applicable_property_trait : false_type
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{
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};
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#if defined(ASIO_HAS_VARIABLE_TEMPLATES)
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template <typename T, typename Property>
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struct is_applicable_property_trait<T, Property,
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typename void_type<
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typename enable_if<
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!!Property::template is_applicable_property_v<T>
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>::type
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>::type> : true_type
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{
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};
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#endif // defined(ASIO_HAS_VARIABLE_TEMPLATES)
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} // namespace detail
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template <typename T, typename Property, typename = void>
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struct is_applicable_property :
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detail::is_applicable_property_trait<T, Property>
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{
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};
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#if defined(ASIO_HAS_VARIABLE_TEMPLATES)
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template <typename T, typename Property>
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ASIO_CONSTEXPR const bool is_applicable_property_v
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= is_applicable_property<T, Property>::value;
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#endif // defined(ASIO_HAS_VARIABLE_TEMPLATES)
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} // namespace asio
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#endif // ASIO_IS_APPLICABLE_PROPERTY_HPP
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