log_msg.hpp

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// SPDX-FileCopyrightText: 2026 Jarosław Pelczar <jarek@jpelczar.com>
//
// SPDX-License-Identifier: BSD-2-Clause
 
#pragma once
 
#include "../microfmt.hpp"
#include <cstdint>
#include <reloco/type_id.hpp>
#include <source_location>
#include <string_view>
 
namespace microfmt::log {
 
// ============================================================================
// Severity Levels
// ============================================================================
 
enum class level : uint8_t { trace = 0, debug, info, warn, err, critical, off };
 
[[nodiscard]] constexpr microfmt::string_view to_string_view(level lvl) noexcept {
  switch (lvl) {
  case level::trace:
    return "trace";
  case level::debug:
    return "debug";
  case level::info:
    return "info";
  case level::warn:
    return "warn";
  case level::err:
    return "error";
  case level::critical:
    return "critical";
  case level::off:
  default:
    return "off";
  }
}
 
[[nodiscard]] constexpr microfmt::string_view to_short_string(level lvl) noexcept {
  switch (lvl) {
  case level::trace:
    return "T";
  case level::debug:
    return "D";
  case level::info:
    return "I";
  case level::warn:
    return "W";
  case level::err:
    return "E";
  case level::critical:
    return "C";
  case level::off:
  default:
    return "O";
  }
}
 
// ============================================================================
// Log Entry Record (Carries zero-copy metadata)
// ============================================================================
 
struct MICROFMT_API_CLASS RELOCO_POINTER log_msg {
  microfmt::string_view logger_name{};
  level lvl{level::info};
  microfmt::instant time{microfmt::instant::now()};
  microfmt::string_view payload{};
  // NOLINTNEXTLINE(reloco-banned-std-type): portable C++20 interop type
  std::source_location loc{std::source_location::current()};
};
 
} // namespace microfmt::log
 
// See <reloco/type_id.hpp> for the full RELOCO_TYPE_ID_NAME rationale;
// defined here, alongside log_msg's/level's own definitions.
RELOCO_TYPE_ID_NAME(microfmt::log::log_msg, "microfmt::log::log_msg");
RELOCO_TYPE_ID_NAME(microfmt::log::level, "microfmt::log::level");