text: // The MIT License (MIT)
  //
  // Copyright (c) 2015-2017 Simon Ninon <simon.ninon@gmail.com>
  //
  // Permission is hereby granted, free of charge, to any person obtaining a copy
  // of this software and associated documentation files (the "Software"), to deal
  // in the Software without restriction, including without limitation the rights
  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  // copies of the Software, and to permit persons to whom the Software is
  // furnished to do so, subject to the following conditions:
  //
  // The above copyright notice and this permission notice shall be included in all
  // copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  // SOFTWARE.
  
  #include <cpp_redis/cpp_redis>
  
  #include <iostream>
  
  class my_logger : public cpp_redis::logger_iface {
  public:
    //! ctor & dtor
    my_logger(void)  = default;
    ~my_logger(void) = default;
  
    //! copy ctor & assignment operator
    my_logger(const my_logger&) = default;
    my_logger& operator=(const my_logger&) = default;
  
  public:
    void
    debug(const std::string& msg, const std::string& file, std::size_t line) {
      std::cout << "debug: " << msg << " @ " << file << ":" << line << std::endl;
    }
  
    void
    info(const std::string& msg, const std::string& file, std::size_t line) {
      std::cout << "info: " << msg << " @ " << file << ":" << line << std::endl;
    }
  
    void
    warn(const std::string& msg, const std::string& file, std::size_t line) {
      std::cout << "warn: " << msg << " @ " << file << ":" << line << std::endl;
    }
  
    void
    error(const std::string& msg, const std::string& file, std::size_t line) {
      std::cerr << "error: " << msg << " @ " << file << ":" << line << std::endl;
    }
  };
  
  
  int
  main(void) {
    //! By default, no logging
    //! Force logger call, just for the example (you will never have to do that by yourself)
    std::cout << "By default: no logging" << std::endl;
    __CPP_REDIS_LOG(debug, "This is a debug message");
    __CPP_REDIS_LOG(info, "This is an info message");
    __CPP_REDIS_LOG(warn, "This is a warn message");
    __CPP_REDIS_LOG(error, "This is an error message");
    std::cout << std::endl;
  
    //! Use the default logger, provided with the library
    cpp_redis::active_logger = std::unique_ptr<cpp_redis::logger>(new cpp_redis::logger);
    //! Force logger call, just for the example (you will never have to do that by yourself)
    std::cout << "With the library provided logger" << std::endl;
    __CPP_REDIS_LOG(debug, "This is a debug message");
    __CPP_REDIS_LOG(info, "This is an info message");
    __CPP_REDIS_LOG(warn, "This is a warn message");
    __CPP_REDIS_LOG(error, "This is an error message");
    std::cout << std::endl;
  
    //! Use your custom logger
    cpp_redis::active_logger = std::unique_ptr<my_logger>(new my_logger);
    //! Force logger call, just for the example (you will never have to do that by yourself)
    std::cout << "With an example of custom logger" << std::endl;
    __CPP_REDIS_LOG(debug, "This is a debug message");
    __CPP_REDIS_LOG(info, "This is an info message");
    __CPP_REDIS_LOG(warn, "This is a warn message");
    __CPP_REDIS_LOG(error, "This is an error message");
    std::cout << std::endl;
  
    return 0;
  }
  