mirror of
https://github.com/azahar-emu/azahar
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77 lines
2.5 KiB
C++
77 lines
2.5 KiB
C++
#pragma once
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#include <boost/config.hpp>
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#include <boost/archive/detail/basic_iarchive.hpp>
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#include <optional>
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#include <boost/move/utility_core.hpp>
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#include <boost/serialization/detail/is_default_constructible.hpp>
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#include <boost/serialization/detail/stack_constructor.hpp>
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#include <boost/serialization/force_include.hpp>
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#include <boost/serialization/item_version_type.hpp>
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#include <boost/serialization/level.hpp>
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#include <boost/serialization/nvp.hpp>
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#include <boost/serialization/split_free.hpp>
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#include <boost/serialization/version.hpp>
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#include <boost/type_traits/is_pointer.hpp>
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// function specializations must be defined in the appropriate
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// namespace - boost::serialization
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namespace boost {
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namespace serialization {
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template <class Archive, class T>
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void save(Archive& ar, const std::optional<T>& t, const unsigned int /*version*/
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) {
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// It is an inherent limitation to the serialization of optional.hpp
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// that the underlying type must be either a pointer or must have a
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// default constructor. It's possible that this could change sometime
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// in the future, but for now, one will have to work around it. This can
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// be done by serialization the optional<T> as optional<T *>
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#if !defined(BOOST_NO_CXX11_HDR_TYPE_TRAITS)
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BOOST_STATIC_ASSERT(boost::serialization::detail::is_default_constructible<T>::value ||
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boost::is_pointer<T>::value);
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#endif
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const bool tflag = t.has_value();
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ar << boost::serialization::make_nvp("initialized", tflag);
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if (tflag) {
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ar << boost::serialization::make_nvp("value", *t);
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}
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}
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template <class Archive, class T>
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void load(Archive& ar, std::optional<T>& t, const unsigned int version) {
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bool tflag;
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ar >> boost::serialization::make_nvp("initialized", tflag);
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if (!tflag) {
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t.reset();
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return;
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}
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if (0 == version) {
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boost::serialization::item_version_type item_version(0);
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boost::archive::library_version_type library_version(ar.get_library_version());
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if (boost::archive::library_version_type(3) < library_version) {
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ar >> BOOST_SERIALIZATION_NVP(item_version);
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}
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}
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if (!t.has_value())
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t = T();
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ar >> boost::serialization::make_nvp("value", *t);
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}
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template <class Archive, class T>
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void serialize(Archive& ar, std::optional<T>& t, const unsigned int version) {
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boost::serialization::split_free(ar, t, version);
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}
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template <class T>
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struct version<std::optional<T>> {
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BOOST_STATIC_CONSTANT(int, value = 1);
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};
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} // namespace serialization
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} // namespace boost
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