immer-map.hpp
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immer-map.hpp
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	/*
	* This file is part of libkazv.
	* SPDX-FileCopyrightText: 2021 Tusooa Zhu <tusooa@kazv.moe>
	* SPDX-License-Identifier: AGPL-3.0-or-later
	*/


	#pragma once

	#include <libkazv-config.hpp>

	#include <boost/serialization/nvp.hpp>
	#include <boost/serialization/split_free.hpp>

	#include <immer/map.hpp>

	namespace boost::serialization
	{

	template <class Archive, class K, class T, class H, class E, class MP>
	void save(Archive &ar, const immer::map<K, T, H, E, MP> &map, const unsigned int /* version */)
	{
	auto size = map.size();
	ar << BOOST_SERIALIZATION_NVP(size);
	for (const auto &[k, v] : map) {
	ar << k << v;
	}
	}

	template <class Archive, class K, class T, class H, class E, class MP>
	void load(Archive &ar, immer::map<K, T, H, E, MP> &map, const unsigned int /* version */)
	{
	// map transient is not yet implemented
	// using TransientT = decltype(v.transient());
	using SizeT = decltype(map.size());

	map = {};

	SizeT size{};
	ar >> BOOST_SERIALIZATION_NVP(size);

	for (auto i = SizeT{}; i < size; ++i) {
	K k;
	T v;
	ar >> k >> v;
	map = std::move(map).set(std::move(k), std::move(v));
	}

	assert(size == map.size());
	}

	template<class Archive, class K, class T, class H, class E, class MP>
	inline void serialize(Archive &ar, immer::map<K, T, H, E, MP> &m, const unsigned int version)
	{
	boost::serialization::split_free(ar, m, version);
	}

	}