text: //
  // Copyright(c) 2015 Gabi Melman.
  // Distributed under the MIT License (http://opensource.org/licenses/MIT)
  //
  // spdlog main header file.
  // see example.cpp for usage example
  
  #pragma once
  
  #include "common.h"
  #include "logger.h"
  
  #include <chrono>
  #include <functional>
  #include <memory>
  #include <string>
  
  namespace spdlog {
  
  //
  // Return an existing logger or nullptr if a logger with such name doesn't exist.
  // example: spdlog::get("my_logger")->info("hello {}", "world");
  //
      std::shared_ptr<logger> get(const std::string &name);
  
  //
  // Set global formatting
  // example: spdlog::set_pattern("%Y-%m-%d %H:%M:%S.%e %l : %v");
  //
      void set_pattern(const std::string &format_string);
  
      void set_formatter(formatter_ptr f);
  
  //
  // Set global logging level
  //
      void set_level(level::level_enum log_level);
  
  //
  // Set global flush level
  //
      void flush_on(level::level_enum log_level);
  
  //
  // Set global error handler
  //
      void set_error_handler(log_err_handler handler);
  
  //
  // Turn on async mode (off by default) and set the queue size for each async_logger.
  // effective only for loggers created after this call.
  // queue_size: size of queue (must be power of 2):
  //    Each logger will pre-allocate a dedicated queue with queue_size entries upon construction.
  //
  // async_overflow_policy (optional, block_retry by default):
  //    async_overflow_policy::block_retry - if queue is full, block until queue has room for the new log entry.
  //    async_overflow_policy::discard_log_msg - never block and discard any new messages when queue overflows.
  //
  // worker_warmup_cb (optional):
  //     callback function that will be called in worker thread upon start (can be used to init stuff like thread affinity)
  //
  // worker_teardown_cb (optional):
  //     callback function that will be called in worker thread upon exit
  //
      void
      set_async_mode(size_t queue_size, const async_overflow_policy overflow_policy = async_overflow_policy::block_retry,
                     const std::function<void()> &worker_warmup_cb = nullptr,
                     const std::chrono::milliseconds &flush_interval_ms = std::chrono::milliseconds::zero(),
                     const std::function<void()> &worker_teardown_cb = nullptr);
  
  // Turn off async mode
      void set_sync_mode();
  
  //
  // Create and register multi/single threaded basic file logger.
  // Basic logger simply writes to given file without any limitations or rotations.
  //
      std::shared_ptr<logger>
      basic_logger_mt(const std::string &logger_name, const filename_t &filename, bool truncate = false);
  
      std::shared_ptr<logger>
      basic_logger_st(const std::string &logger_name, const filename_t &filename, bool truncate = false);
  
  //
  // Create and register multi/single threaded rotating file logger
  //
      std::shared_ptr<logger> rotating_logger_mt(
              const std::string &logger_name, const filename_t &filename, size_t max_file_size, size_t max_files);
  
      std::shared_ptr<logger> rotating_logger_st(
              const std::string &logger_name, const filename_t &filename, size_t max_file_size, size_t max_files);
  
  //
  // Create file logger which creates new file on the given time (default in midnight):
  //
      std::shared_ptr<logger>
      daily_logger_mt(const std::string &logger_name, const filename_t &filename, int hour = 0, int minute = 0);
  
      std::shared_ptr<logger>
      daily_logger_st(const std::string &logger_name, const filename_t &filename, int hour = 0, int minute = 0);
  
  //
  // Create and register stdout/stderr loggers
  //
      std::shared_ptr<logger> stdout_logger_mt(const std::string &logger_name);
  
      std::shared_ptr<logger> stdout_logger_st(const std::string &logger_name);
  
      std::shared_ptr<logger> stderr_logger_mt(const std::string &logger_name);
  
      std::shared_ptr<logger> stderr_logger_st(const std::string &logger_name);
  
  //
  // Create and register colored stdout/stderr loggers
  //
      std::shared_ptr<logger> stdout_color_mt(const std::string &logger_name);
  
      std::shared_ptr<logger> stdout_color_st(const std::string &logger_name);
  
      std::shared_ptr<logger> stderr_color_mt(const std::string &logger_name);
  
      std::shared_ptr<logger> stderr_color_st(const std::string &logger_name);
  
  //
  // Create and register a syslog logger
  //
  #ifdef SPDLOG_ENABLE_SYSLOG
      std::shared_ptr<logger> syslog_logger(
          const std::string &logger_name, const std::string &ident = "", int syslog_option = 0, int syslog_facilty = (1 << 3));
  #endif
  
  #if defined(__ANDROID__)
      std::shared_ptr<logger> android_logger(const std::string &logger_name, const std::string &tag = "spdlog");
  #endif
  
  // Create and register a logger with a single sink
      std::shared_ptr<logger> create(const std::string &logger_name, const sink_ptr &sink);
  
  // Create and register a logger with multiple sinks
      std::shared_ptr<logger> create(const std::string &logger_name, sinks_init_list sinks);
  
      template<class It>
      std::shared_ptr<logger> create(const std::string &logger_name, const It &sinks_begin, const It &sinks_end);
  
  // Create and register a logger with templated sink type
  // Example:
  // spdlog::create<daily_file_sink_st>("mylog", "dailylog_filename");
      template<typename Sink, typename... Args>
      std::shared_ptr<spdlog::logger> create(const std::string &logger_name, Args... args);
  
  // Create and register an async logger with a single sink
      std::shared_ptr<logger> create_async(const std::string &logger_name, const sink_ptr &sink, size_t queue_size,
                                           const async_overflow_policy overflow_policy = async_overflow_policy::block_retry,
                                           const std::function<void()> &worker_warmup_cb = nullptr,
                                           const std::chrono::milliseconds &flush_interval_ms = std::chrono::milliseconds::zero(),
                                           const std::function<void()> &worker_teardown_cb = nullptr);
  
  // Create and register an async logger with multiple sinks
      std::shared_ptr<logger> create_async(const std::string &logger_name, sinks_init_list sinks, size_t queue_size,
                                           const async_overflow_policy overflow_policy = async_overflow_policy::block_retry,
                                           const std::function<void()> &worker_warmup_cb = nullptr,
                                           const std::chrono::milliseconds &flush_interval_ms = std::chrono::milliseconds::zero(),
                                           const std::function<void()> &worker_teardown_cb = nullptr);
  
      template<class It>
      std::shared_ptr<logger>
      create_async(const std::string &logger_name, const It &sinks_begin, const It &sinks_end, size_t queue_size,
                   const async_overflow_policy overflow_policy = async_overflow_policy::block_retry,
                   const std::function<void()> &worker_warmup_cb = nullptr,
                   const std::chrono::milliseconds &flush_interval_ms = std::chrono::milliseconds::zero(),
                   const std::function<void()> &worker_teardown_cb = nullptr);
  
  // Register the given logger with the given name
      void register_logger(std::shared_ptr<logger> logger);
  
  // Apply a user defined function on all registered loggers
  // Example:
  // spdlog::apply_all([&](std::shared_ptr<spdlog::logger> l) {l->flush();});
      void apply_all(std::function<void(std::shared_ptr<logger>)> fun);
  
  // Drop the reference to the given logger
      void drop(const std::string &name);
  
  // Drop all references from the registry
      void drop_all();
  
  ///////////////////////////////////////////////////////////////////////////////
  //
  // Trace & Debug can be switched on/off at compile time for zero cost debug statements.
  // Uncomment SPDLOG_DEBUG_ON/SPDLOG_TRACE_ON in tweakme.h to enable.
  // SPDLOG_TRACE(..) will also print current file and line.
  //
  // Example:
  // spdlog::set_level(spdlog::level::trace);
  // SPDLOG_TRACE(my_logger, "some trace message");
  // SPDLOG_TRACE(my_logger, "another trace message {} {}", 1, 2);
  // SPDLOG_DEBUG(my_logger, "some debug message {} {}", 3, 4);
  ///////////////////////////////////////////////////////////////////////////////
  
  #ifdef SPDLOG_TRACE_ON
  #define SPDLOG_STR_H(x) #x
  #define SPDLOG_STR_HELPER(x) SPDLOG_STR_H(x)
  #ifdef _MSC_VER
  #define SPDLOG_TRACE(logger, ...) logger->trace("[ " __FILE__ "(" SPDLOG_STR_HELPER(__LINE__) ") ] " __VA_ARGS__)
  #else
  #define SPDLOG_TRACE(logger, ...) logger->trace("[ " __FILE__ ":" SPDLOG_STR_HELPER(__LINE__) " ] " __VA_ARGS__)
  #endif
  #else
  #define SPDLOG_TRACE(logger, ...) (void)0
  #endif
  
  #ifdef SPDLOG_DEBUG_ON
  #define SPDLOG_DEBUG(logger, ...) logger->debug(__VA_ARGS__)
  #else
  #define SPDLOG_DEBUG(logger, ...) (void)0
  #endif
  
  } // namespace spdlog
  
  #include "details/spdlog_impl.h"
  