63e88f80
 Hu Chunming
提交三方库
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#ifndef BOOST_DESCRIBE_ENUMERATORS_HPP_INCLUDED
#define BOOST_DESCRIBE_ENUMERATORS_HPP_INCLUDED
// Copyright 2020, 2021 Peter Dimov
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#include <boost/describe/detail/void_t.hpp>
#include <boost/describe/detail/config.hpp>
#if defined(BOOST_DESCRIBE_CXX11)
#include <type_traits>
namespace boost
{
namespace describe
{
// describe_enumerators<E>
template<class E> using describe_enumerators = decltype( boost_enum_descriptor_fn( static_cast<E**>(0) ) );
// has_describe_enumerators<E>
namespace detail
{
template<class E, class En = void> struct has_describe_enumerators: std::false_type
{
};
template<class E> struct has_describe_enumerators<E, void_t<describe_enumerators<E>>>: std::true_type
{
};
} // namespace detail
template<class E> using has_describe_enumerators = detail::has_describe_enumerators<E>;
} // namespace describe
} // namespace boost
#endif // defined(BOOST_DESCRIBE_CXX11)
#endif // #ifndef BOOST_DESCRIBE_ENUMERATORS_HPP_INCLUDED
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