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//
// MessagePack for C++ static resolution routine
//
// Copyright (C) 2017 KONDO Takatoshi
//
// 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)
//
#ifndef MSGPACK_V1_TYPE_OPTIONAL_HPP
#define MSGPACK_V1_TYPE_OPTIONAL_HPP
#include "msgpack/cpp_version.hpp"
#if MSGPACK_CPP_VERSION >= 201703
#include "msgpack/versioning.hpp"
#include "msgpack/adaptor/adaptor_base.hpp"
#include "msgpack/object.hpp"
#include "msgpack/adaptor/check_container_size.hpp"
#include <optional>
namespace msgpack {
/// @cond
MSGPACK_API_VERSION_NAMESPACE(v1) {
/// @endcond
namespace adaptor {
#if !defined (MSGPACK_USE_CPP03)
template <typename T>
struct as<std::optional<T>, typename std::enable_if<msgpack::has_as<T>::value>::type> {
std::optional<T> operator()(msgpack::object const& o) const {
if(o.is_nil()) return std::nullopt;
return o.as<T>();
}
};
#endif // !defined (MSGPACK_USE_CPP03)
template <typename T>
struct convert<std::optional<T> > {
msgpack::object const& operator()(msgpack::object const& o, std::optional<T>& v) const {
if(o.is_nil()) v = std::nullopt;
else {
T t;
msgpack::adaptor::convert<T>()(o, t);
v = t;
}
return o;
}
};
template <typename T>
struct pack<std::optional<T> > {
template <typename Stream>
msgpack::packer<Stream>& operator()(msgpack::packer<Stream>& o, const std::optional<T>& v) const {
if (v) o.pack(*v);
else o.pack_nil();
return o;
}
};
template <typename T>
struct object<std::optional<T> > {
void operator()(msgpack::object& o, const std::optional<T>& v) const {
if (v) msgpack::adaptor::object<T>()(o, *v);
else o.type = msgpack::type::NIL;
}
};
template <typename T>
struct object_with_zone<std::optional<T> > {
void operator()(msgpack::object::with_zone& o, const std::optional<T>& v) const {
if (v) msgpack::adaptor::object_with_zone<T>()(o, *v);
else o.type = msgpack::type::NIL;
}
};
} // namespace adaptor
/// @cond
} // MSGPACK_API_VERSION_NAMESPACE(v1)
/// @endcond
} // namespace msgpack
#endif // MSGPACK_CPP_VERSION >= 201703
#endif // MSGPACK_V1_TYPE_OPTIONAL_HPP
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