Mercurial > hg > vamp-build-and-test
diff DEPENDENCIES/generic/include/boost/serialization/variant.hpp @ 16:2665513ce2d3
Add boost headers
author | Chris Cannam |
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date | Tue, 05 Aug 2014 11:11:38 +0100 |
parents | |
children | c530137014c0 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/DEPENDENCIES/generic/include/boost/serialization/variant.hpp Tue Aug 05 11:11:38 2014 +0100 @@ -0,0 +1,163 @@ +#ifndef BOOST_SERIALIZATION_VARIANT_HPP +#define BOOST_SERIALIZATION_VARIANT_HPP + +// MS compatible compilers support #pragma once +#if defined(_MSC_VER) && (_MSC_VER >= 1020) +# pragma once +#endif + +#if defined(_MSC_VER) && (_MSC_VER <= 1020) +# pragma warning (disable : 4786) // too long name, harmless warning +#endif + +/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8 +// variant.hpp - non-intrusive serialization of variant types +// +// copyright (c) 2005 +// troy d. straszheim <troy@resophonic.com> +// http://www.resophonic.com +// +// Use, modification and distribution is subject to 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) +// +// See http://www.boost.org for updates, documentation, and revision history. +// +// thanks to Robert Ramey, Peter Dimov, and Richard Crossley. +// + +#include <boost/mpl/front.hpp> +#include <boost/mpl/pop_front.hpp> +#include <boost/mpl/eval_if.hpp> +#include <boost/mpl/identity.hpp> +#include <boost/mpl/size.hpp> +#include <boost/mpl/empty.hpp> + +#include <boost/serialization/throw_exception.hpp> + +#include <boost/variant.hpp> + +#include <boost/archive/archive_exception.hpp> + +#include <boost/serialization/split_free.hpp> +#include <boost/serialization/serialization.hpp> +#include <boost/serialization/nvp.hpp> + +namespace boost { +namespace serialization { + +template<class Archive> +struct variant_save_visitor : + boost::static_visitor<> +{ + variant_save_visitor(Archive& ar) : + m_ar(ar) + {} + template<class T> + void operator()(T const & value) const + { + m_ar << BOOST_SERIALIZATION_NVP(value); + } +private: + Archive & m_ar; +}; + +template<class Archive, BOOST_VARIANT_ENUM_PARAMS(/* typename */ class T)> +void save( + Archive & ar, + boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> const & v, + unsigned int /*version*/ +){ + int which = v.which(); + ar << BOOST_SERIALIZATION_NVP(which); + typedef BOOST_DEDUCED_TYPENAME boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)>::types types; + variant_save_visitor<Archive> visitor(ar); + v.apply_visitor(visitor); +} + +template<class S> +struct variant_impl { + + struct load_null { + template<class Archive, class V> + static void invoke( + Archive & /*ar*/, + int /*which*/, + V & /*v*/, + const unsigned int /*version*/ + ){} + }; + + struct load_impl { + template<class Archive, class V> + static void invoke( + Archive & ar, + int which, + V & v, + const unsigned int version + ){ + if(which == 0){ + // note: A non-intrusive implementation (such as this one) + // necessary has to copy the value. This wouldn't be necessary + // with an implementation that de-serialized to the address of the + // aligned storage included in the variant. + typedef BOOST_DEDUCED_TYPENAME mpl::front<S>::type head_type; + head_type value; + ar >> BOOST_SERIALIZATION_NVP(value); + v = value; + ar.reset_object_address(& boost::get<head_type>(v), & value); + return; + } + typedef BOOST_DEDUCED_TYPENAME mpl::pop_front<S>::type type; + variant_impl<type>::load(ar, which - 1, v, version); + } + }; + + template<class Archive, class V> + static void load( + Archive & ar, + int which, + V & v, + const unsigned int version + ){ + typedef BOOST_DEDUCED_TYPENAME mpl::eval_if<mpl::empty<S>, + mpl::identity<load_null>, + mpl::identity<load_impl> + >::type typex; + typex::invoke(ar, which, v, version); + } + +}; + +template<class Archive, BOOST_VARIANT_ENUM_PARAMS(/* typename */ class T)> +void load( + Archive & ar, + boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)>& v, + const unsigned int version +){ + int which; + typedef BOOST_DEDUCED_TYPENAME boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)>::types types; + ar >> BOOST_SERIALIZATION_NVP(which); + if(which >= mpl::size<types>::value) + // this might happen if a type was removed from the list of variant types + boost::serialization::throw_exception( + boost::archive::archive_exception( + boost::archive::archive_exception::unsupported_version + ) + ); + variant_impl<types>::load(ar, which, v, version); +} + +template<class Archive,BOOST_VARIANT_ENUM_PARAMS(/* typename */ class T)> +inline void serialize( + Archive & ar, + boost::variant<BOOST_VARIANT_ENUM_PARAMS(T)> & v, + const unsigned int file_version +){ + split_free(ar,v,file_version); +} + +} // namespace serialization +} // namespace boost + +#endif //BOOST_SERIALIZATION_VARIANT_HPP