text: //
  // Copyright(c) 2015-2108 Gabi Melman.
  // Distributed under the MIT License (http://opensource.org/licenses/MIT)
  //
  
  #pragma once
  
  // Thread safe logger (except for set_pattern(..), set_formatter(..) and
  // set_error_handler())
  // Has name, log level, vector of std::shared sink pointers and formatter
  // Upon each log write the logger:
  // 1. Checks if its log level is enough to log the message and if yes:
  // 2. Call the underlying sinks to do the job.
  // 3. Each sink use its own private copy of a formatter to format the message
  // and send to its destination.
  //
  // The use of private formatter per sink provides the opportunity to cache some
  // formatted data,
  // and support customize format per each sink.
  
  #include "spdlog/common.h"
  #include "spdlog/formatter.h"
  #include "spdlog/sinks/sink.h"
  
  #include <locale>
  #include <memory>
  #include <string>
  #include <vector>
  
  namespace spdlog {
  
  class logger
  {
  public:
      logger(std::string name, sink_ptr single_sink);
      logger(std::string name, sinks_init_list sinks);
  
      template<typename It>
      logger(std::string name, It begin, It end);
  
      virtual ~logger();
  
      logger(const logger &) = delete;
      logger &operator=(const logger &) = delete;
  
      template<typename... Args>
      void log(level::level_enum lvl, const char *fmt, const Args &... args);
  
      void log(level::level_enum lvl, const char *msg);
  
      template<typename... Args>
      void trace(const char *fmt, const Args &... args);
  
      template<typename... Args>
      void debug(const char *fmt, const Args &... args);
  
      template<typename... Args>
      void info(const char *fmt, const Args &... args);
  
      template<typename... Args>
      void warn(const char *fmt, const Args &... args);
  
      template<typename... Args>
      void error(const char *fmt, const Args &... args);
  
      template<typename... Args>
      void critical(const char *fmt, const Args &... args);
  
  #ifdef SPDLOG_WCHAR_TO_UTF8_SUPPORT
  #ifndef _WIN32
  #error SPDLOG_WCHAR_TO_UTF8_SUPPORT only supported on windows
  #else
      template<typename... Args>
      void log(level::level_enum lvl, const wchar_t *fmt, const Args &... args);
  
      template<typename... Args>
      void trace(const wchar_t *fmt, const Args &... args);
  
      template<typename... Args>
      void debug(const wchar_t *fmt, const Args &... args);
  
      template<typename... Args>
      void info(const wchar_t *fmt, const Args &... args);
  
      template<typename... Args>
      void warn(const wchar_t *fmt, const Args &... args);
  
      template<typename... Args>
      void error(const wchar_t *fmt, const Args &... args);
  
      template<typename... Args>
      void critical(const wchar_t *fmt, const Args &... args);
  #endif // _WIN32
  #endif // SPDLOG_WCHAR_TO_UTF8_SUPPORT
  
      // T can be statically converted to string_view
      template<class T, typename std::enable_if<std::is_convertible<T, spdlog::string_view_t>::value, T>::type * = nullptr>
      void log(level::level_enum lvl, const T &);
  
      // T cannot be statically converted to string_view
      template<class T, typename std::enable_if<!std::is_convertible<T, spdlog::string_view_t>::value, T>::type * = nullptr>
      void log(level::level_enum lvl, const T &);
  
      template<typename T>
      void trace(const T &msg);
  
      template<typename T>
      void debug(const T &msg);
  
      template<typename T>
      void info(const T &msg);
  
      template<typename T>
      void warn(const T &msg);
  
      template<typename T>
      void error(const T &msg);
  
      template<typename T>
      void critical(const T &msg);
  
      bool should_log(level::level_enum msg_level) const;
      void set_level(level::level_enum log_level);
  
      static level::level_enum default_level();
      level::level_enum level() const;
      const std::string &name() const;
  
      // set formatting for the sinks in this logger.
      // each sink will get a seperate instance of the formatter object.
      void set_formatter(std::unique_ptr<formatter> formatter);
      void set_pattern(std::string pattern, pattern_time_type time_type = pattern_time_type::local);
  
      // flush functions
      void flush();
      void flush_on(level::level_enum log_level);
      level::level_enum flush_level() const;
  
      // sinks
      const std::vector<sink_ptr> &sinks() const;
      std::vector<sink_ptr> &sinks();
  
      // error handler
      void set_error_handler(log_err_handler err_handler);
      log_err_handler error_handler() const;
  
      // create new logger with same sinks and configuration.
      virtual std::shared_ptr<logger> clone(std::string logger_name);
  
  protected:
      virtual void sink_it_(details::log_msg &msg);
      virtual void flush_();
  
      bool should_flush_(const details::log_msg &msg);
  
      // default error handler.
      // print the error to stderr with the max rate of 1 message/minute.
      void default_err_handler_(const std::string &msg);
  
      // increment the message count (only if defined(SPDLOG_ENABLE_MESSAGE_COUNTER))
      void incr_msg_counter_(details::log_msg &msg);
  
      const std::string name_;
      std::vector<sink_ptr> sinks_;
      spdlog::level_t level_{spdlog::logger::default_level()};
      spdlog::level_t flush_level_{level::off};
      log_err_handler err_handler_{[this](const std::string &msg) { this->default_err_handler_(msg); }};
      std::atomic<time_t> last_err_time_{0};
      std::atomic<size_t> msg_counter_{1};
  };
  } // namespace spdlog
  
  #include "details/logger_impl.h"
  