format_msgpack_object.h

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/*
 * Copyright 2023 MusicScience37 (Kenta Kabashima)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#pragma once
 
#include <fmt/base.h>
#include <msgpack.hpp>
 
#include "msgpack_rpc/impl/msgpack_rpc_export.h"
 
namespace msgpack_rpc::util::impl {

class MSGPACK_RPC_EXPORT FmtMsgpackObjectProxy {
public:
    explicit FmtMsgpackObjectProxy(const msgpack::object& object);

    [[nodiscard]] const msgpack::object& object() const noexcept;
 
private:
    const msgpack::object&
        object_;  // NOLINT(cppcoreguidelines-avoid-const-or-ref-data-members)
                  // This class is used only as temporary objects.
};
 
}  // namespace msgpack_rpc::util::impl
 
namespace fmt {

template <>
struct formatter<msgpack_rpc::util::impl::FmtMsgpackObjectProxy> {
public:
    constexpr format_parse_context::iterator parse(  // NOLINT
        format_parse_context& context) {
        return context.end();
    }

    [[nodiscard]] MSGPACK_RPC_EXPORT format_context::iterator format(
        const msgpack_rpc::util::impl::FmtMsgpackObjectProxy& value,
        format_context& context) const;
};
 
}  // namespace fmt
 
namespace msgpack_rpc::util {

[[nodiscard]] MSGPACK_RPC_EXPORT impl::FmtMsgpackObjectProxy
format_msgpack_object(const msgpack::object& object);
 
}  // namespace msgpack_rpc::util