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Contents
// Copyright (c) 2018-2020 Dr. Colin Hirsch and Daniel Frey
// Please see LICENSE for license or visit https://github.com/taocpp/json/
#ifndef TAO_JSON_CONTRIB_TUPLE_TRAITS_HPP
#define TAO_JSON_CONTRIB_TUPLE_TRAITS_HPP
#include <tuple>
#include <utility>
#include "../binding.hpp"
namespace tao::json
{
namespace internal
{
template< std::size_t I, typename... Ts >
struct getter
{
[[nodiscard]] static decltype( auto ) get( std::tuple< Ts... >& t ) noexcept
{
return std::get< I >( t );
}
[[nodiscard]] static decltype( auto ) cget( const std::tuple< Ts... >& t ) noexcept
{
return std::get< I >( t );
}
};
template< typename Indices, typename... Ts >
struct tuple_traits;
template< std::size_t... Is, typename... Ts >
struct tuple_traits< std::index_sequence< Is... >, Ts... >
{
template< std::size_t I >
using helper_t = binding::element2< &getter< I, Ts... >::cget, &getter< I, Ts... >::get >;
using type = binding::array< helper_t< Is >... >;
};
} // namespace internal
template< typename... Ts >
struct tuple_traits
: internal::tuple_traits< std::index_sequence_for< Ts... >, Ts... >::type
{};
} // namespace tao::json
#endif
Version data entries
34 entries across 34 versions & 1 rubygems