text: 
  // Copyright (c) 2010-2019 niXman (i dot nixman dog gmail dot com). All
  // rights reserved.
  //
  // This file is part of YAS(https://github.com/niXman/yas) project.
  //
  // 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)
  //
  //
  //
  // Boost Software License - Version 1.0 - August 17th, 2003
  //
  // Permission is hereby granted, free of charge, to any person or organization
  // obtaining a copy of the software and accompanying documentation covered by
  // this license (the "Software") to use, reproduce, display, distribute,
  // execute, and transmit the Software, and to prepare derivative works of the
  // Software, and to permit third-parties to whom the Software is furnished to
  // do so, all subject to the following:
  //
  // The copyright notices in the Software and this entire statement, including
  // the above license grant, this restriction and the following disclaimer,
  // must be included in all copies of the Software, in whole or in part, and
  // all derivative works of the Software, unless such copies or derivative
  // works are solely in the form of machine-executable object code generated by
  // a source language processor.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
  // SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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  // DEALINGS IN THE SOFTWARE.
  
  #ifndef __yas__types__boost__boost_tuple_serializers_hpp
  #define __yas__types__boost__boost_tuple_serializers_hpp
  
  #if defined(YAS_SERIALIZE_BOOST_TYPES)
  #include <yas/detail/tools/cast.hpp>
  #include <yas/detail/tools/tuple_element_name.hpp>
  #include <yas/detail/type_traits/type_traits.hpp>
  #include <yas/detail/type_traits/serializer.hpp>
  #include <yas/detail/io/serialization_exceptions.hpp>
  
  #include <boost/tuple/tuple.hpp>
  #include <boost/tuple/tuple_comparison.hpp>
  
  namespace yas {
  namespace detail {
  
  /***************************************************************************/
  
  template<std::size_t F, typename... Types>
  struct serializer<
  	 type_prop::not_a_fundamental
  	,ser_case::use_internal_serializer
  	,F
  	,boost::tuple<Types...>
  > {
  	template<typename Archive>
  	static Archive& save(Archive &ar, const boost::tuple<Types...> &tuple) {
          constexpr std::size_t tuple_size = boost::tuples::length<boost::tuple<Types...>>::value;
          __YAS_CONSTEXPR_IF ( F & options::binary ) {
  			ar.write(__YAS_SCAST(std::uint8_t, tuple_size));
  		} else if ( F & yas::text ) {
  			ar.write(tuple_size);
  		}
  
          __YAS_CONSTEXPR_IF ( F & yas::json ) { ar.write("[", 1); }
  
  		apply<tuple_size>(ar, tuple);
  
          __YAS_CONSTEXPR_IF ( F & yas::json ) { ar.write("]", 1); }
  
  		return ar;
  	}
  	template<typename Archive>
  	static Archive& load(Archive &ar, boost::tuple<Types...> &tuple) {
  		constexpr std::size_t tuple_size = boost::tuples::length<boost::tuple<Types...>>::value;
          __YAS_CONSTEXPR_IF ( F & options::binary ) {
  			std::uint8_t size = 0;
  			ar.read(size);
  			if ( size != tuple_size ) { __YAS_THROW_BAD_SIZE_ON_DESERIALIZE("boost::tuple"); }
  		} else if ( F & yas::text ) {
  			std::uint32_t size = 0;
  			ar.read(size);
  			if ( size != tuple_size ) { __YAS_THROW_BAD_SIZE_ON_DESERIALIZE("boost::tuple"); }
  		}
  
          __YAS_CONSTEXPR_IF ( F & yas::json ) {
              if ( 0 == tuple_size ) {
                  __YAS_THROW_IF_BAD_JSON_CHARS(ar, "[]");
  
                  return ar;
              }
  
              __YAS_THROW_IF_BAD_JSON_CHARS(ar, "[");
          }
  
          apply<tuple_size>(ar, tuple);
  
          __YAS_CONSTEXPR_IF ( F & yas::json ) { __YAS_THROW_IF_BAD_JSON_CHARS(ar, "]"); }
  
  		return ar;
  	}
  
  private:
  	template<std::size_t S, std::size_t I = 0, typename Archive, typename... Tp>
  	static typename std::enable_if<I == S, Archive&>::type
  	apply(Archive &ar, const boost::tuple<Tp...> &)
  	{ return ar; }
  	template<std::size_t S, std::size_t I = 0, typename Archive, typename... Tp>
  	static typename std::enable_if<I < S, Archive&>::type
  	apply(Archive &ar, const boost::tuple<Tp...> &t) {
          using tuple_element_name_t = tuple_element_name<I>;
          ar & YAS_OBJECT_NVP(
  			 nullptr
  		    ,(tuple_element_name_t::c_str(), boost::get<I>(t))
  		);
  
          __YAS_CONSTEXPR_IF ( (F & yas::json) && I+1 < S ) {
  			ar.write(",", 1);
  		}
  
  		return apply<S, I+1>(ar, t);
  	}
  
  	template<std::size_t S, std::size_t I = 0, typename Archive, typename... Tp>
  	static typename std::enable_if<I == S, Archive&>::type
  	apply(Archive &ar, boost::tuple<Tp...> &)
  	{ return ar; }
  	template<std::size_t S, std::size_t I = 0, typename Archive, typename... Tp>
  	static typename std::enable_if<I < S, Archive&>::type
  	apply(Archive &ar, boost::tuple<Tp...> &t) {
          using tuple_element_name_t = tuple_element_name<I>;
          ar & YAS_OBJECT_NVP(
               nullptr
              ,(tuple_element_name_t::c_str(), boost::get<I>(t))
          );
  
          __YAS_CONSTEXPR_IF ( (F & yas::json) && I+1 < S ) { __YAS_THROW_IF_BAD_JSON_CHARS(ar, ","); }
  
  		return apply<S, I+1>(ar, t);
  	}
  };
  
  /***************************************************************************/
  
  } // namespace detail
  } // namespace yas
  
  #endif // defined(YAS_SERIALIZE_BOOST_TYPES)
  
  #endif // __yas__types__boost__boost_tuple_serializers_hpp
  