source_location_view.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 <cstdint>
#include <string_view>
 
namespace msgpack_rpc::logging {

class SourceLocationView {
public:
    constexpr SourceLocationView(std::string_view file_path, std::uint32_t line,
        std::string_view function) noexcept
        : file_path_(file_path), line_(line), function_(function) {}

    [[nodiscard]] constexpr std::string_view file_path() const noexcept {
        return file_path_;
    }

    [[nodiscard]] constexpr std::uint32_t line() const noexcept {
        return line_;
    }

    [[nodiscard]] constexpr std::string_view function() const noexcept {
        return function_;
    }
 
private:
    std::string_view file_path_;

    std::uint32_t line_;

    std::string_view function_;
};
 
}  // namespace msgpack_rpc::logging

#define MSGPACK_RPC_CURRENT_FILE_PATH __FILE__

#define MSGPACK_RPC_CURRENT_LINE __LINE__
 
#ifdef MSGPACK_RPC_DOCUMENTATION
#define MSGPACK_RPC_CURRENT_FUNCTION <implementation defined strings>
#elif __GNUC__  // GCC and Clang
#define MSGPACK_RPC_CURRENT_FUNCTION __func__
#elif _MSC_VER  // MSVC
#define MSGPACK_RPC_CURRENT_FUNCTION __FUNCSIG__
#else  // fallback (C++ standard)
#define MSGPACK_RPC_CURRENT_FUNCTION __func__
#endif

#define MSGPACK_RPC_CURRENT_SOURCE_LOCATION()                       \
    ::msgpack_rpc::logging::SourceLocationView(                     \
        std::string_view(MSGPACK_RPC_CURRENT_FILE_PATH), /*NOLINT*/ \
        static_cast<std::uint32_t>(MSGPACK_RPC_CURRENT_LINE),       \
        std::string_view(MSGPACK_RPC_CURRENT_FUNCTION)) /*NOLINT*/