is_applicable_property.hpp
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//
// is_applicable_property.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// 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)
//
#ifndef ASIO_IS_APPLICABLE_PROPERTY_HPP
#define ASIO_IS_APPLICABLE_PROPERTY_HPP
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include "asio/detail/config.hpp"
#include "asio/detail/type_traits.hpp"
namespace asio {
namespace detail {
template <typename T, typename Property, typename = void>
struct is_applicable_property_trait : false_type
{
};
#if defined(ASIO_HAS_VARIABLE_TEMPLATES)
template <typename T, typename Property>
struct is_applicable_property_trait<T, Property,
typename void_type<
typename enable_if<
!!Property::template is_applicable_property_v<T>
>::type
>::type> : true_type
{
};
#endif // defined(ASIO_HAS_VARIABLE_TEMPLATES)
} // namespace detail
template <typename T, typename Property, typename = void>
struct is_applicable_property :
detail::is_applicable_property_trait<T, Property>
{
};
#if defined(ASIO_HAS_VARIABLE_TEMPLATES)
template <typename T, typename Property>
ASIO_CONSTEXPR const bool is_applicable_property_v
= is_applicable_property<T, Property>::value;
#endif // defined(ASIO_HAS_VARIABLE_TEMPLATES)
} // namespace asio
#endif // ASIO_IS_APPLICABLE_PROPERTY_HPP