text: //
  //  Bismillah ar-Rahmaan ar-Raheem
  //
  //  Easylogging++ v9.96.7
  //  Single-header only, cross-platform logging library for C++ applications
  //
  //  Copyright (c) 2012-2018 Zuhd Web Services
  //  Copyright (c) 2012-2018 @abumusamq
  //
  //  This library is released under the MIT Licence.
  //  https://github.com/zuhd-org/easyloggingpp/blob/master/LICENSE
  //
  //  https://zuhd.org
  //  http://muflihun.com
  //
  
  #ifndef EASYLOGGINGPP_H
  #define EASYLOGGINGPP_H
  // Compilers and C++0x/C++11 Evaluation
  #if __cplusplus >= 201103L
  #  define ELPP_CXX11 1
  #endif  // __cplusplus >= 201103L
  #if (defined(__GNUC__))
  #  define ELPP_COMPILER_GCC 1
  #else
  #  define ELPP_COMPILER_GCC 0
  #endif
  #if ELPP_COMPILER_GCC
  #    define ELPP_GCC_VERSION (__GNUC__ * 10000 \
  + __GNUC_MINOR__ * 100 \
  + __GNUC_PATCHLEVEL__)
  #  if defined(__GXX_EXPERIMENTAL_CXX0X__)
  #    define ELPP_CXX0X 1
  #  endif
  #endif
  // Visual C++
  #if defined(_MSC_VER)
  #  define ELPP_COMPILER_MSVC 1
  #else
  #  define ELPP_COMPILER_MSVC 0
  #endif
  #define ELPP_CRT_DBG_WARNINGS ELPP_COMPILER_MSVC
  #if ELPP_COMPILER_MSVC
  #  if (_MSC_VER == 1600)
  #    define ELPP_CXX0X 1
  #  elif(_MSC_VER >= 1700)
  #    define ELPP_CXX11 1
  #  endif
  #endif
  // Clang++
  #if (defined(__clang__) && (__clang__ == 1))
  #  define ELPP_COMPILER_CLANG 1
  #else
  #  define ELPP_COMPILER_CLANG 0
  #endif
  #if ELPP_COMPILER_CLANG
  #  if __has_include(<thread>)
  #    include <cstddef> // Make __GLIBCXX__ defined when using libstdc++
  #    if !defined(__GLIBCXX__) || __GLIBCXX__ >= 20150426
  #      define ELPP_CLANG_SUPPORTS_THREAD
  #    endif // !defined(__GLIBCXX__) || __GLIBCXX__ >= 20150426
  #  endif // __has_include(<thread>)
  #endif
  #if (defined(__MINGW32__) || defined(__MINGW64__))
  #  define ELPP_MINGW 1
  #else
  #  define ELPP_MINGW 0
  #endif
  #if (defined(__CYGWIN__) && (__CYGWIN__ == 1))
  #  define ELPP_CYGWIN 1
  #else
  #  define ELPP_CYGWIN 0
  #endif
  #if (defined(__INTEL_COMPILER))
  #  define ELPP_COMPILER_INTEL 1
  #else
  #  define ELPP_COMPILER_INTEL 0
  #endif
  // Operating System Evaluation
  // Windows
  #if (defined(_WIN32) || defined(_WIN64))
  #  define ELPP_OS_WINDOWS 1
  #else
  #  define ELPP_OS_WINDOWS 0
  #endif
  // Linux
  #if (defined(__linux) || defined(__linux__))
  #  define ELPP_OS_LINUX 1
  #else
  #  define ELPP_OS_LINUX 0
  #endif
  #if (defined(__APPLE__))
  #  define ELPP_OS_MAC 1
  #else
  #  define ELPP_OS_MAC 0
  #endif
  #if (defined(__FreeBSD__) || defined(__FreeBSD_kernel__))
  #  define ELPP_OS_FREEBSD 1
  #else
  #  define ELPP_OS_FREEBSD 0
  #endif
  #if (defined(__sun))
  #  define ELPP_OS_SOLARIS 1
  #else
  #  define ELPP_OS_SOLARIS 0
  #endif
  #if (defined(_AIX))
  #  define ELPP_OS_AIX 1
  #else
  #  define ELPP_OS_AIX 0
  #endif
  #if (defined(__NetBSD__))
  #  define ELPP_OS_NETBSD 1
  #else
  #  define ELPP_OS_NETBSD 0
  #endif
  #if defined(__EMSCRIPTEN__)
  #  define ELPP_OS_EMSCRIPTEN 1
  #else
  #  define ELPP_OS_EMSCRIPTEN 0
  #endif
  // Unix
  #if ((ELPP_OS_LINUX || ELPP_OS_MAC || ELPP_OS_FREEBSD || ELPP_OS_NETBSD || ELPP_OS_SOLARIS || ELPP_OS_AIX || ELPP_OS_EMSCRIPTEN) && (!ELPP_OS_WINDOWS))
  #  define ELPP_OS_UNIX 1
  #else
  #  define ELPP_OS_UNIX 0
  #endif
  #if (defined(__ANDROID__))
  #  define ELPP_OS_ANDROID 1
  #else
  #  define ELPP_OS_ANDROID 0
  #endif
  // Evaluating Cygwin as *nix OS
  #if !ELPP_OS_UNIX && !ELPP_OS_WINDOWS && ELPP_CYGWIN
  #  undef ELPP_OS_UNIX
  #  undef ELPP_OS_LINUX
  #  define ELPP_OS_UNIX 1
  #  define ELPP_OS_LINUX 1
  #endif //  !ELPP_OS_UNIX && !ELPP_OS_WINDOWS && ELPP_CYGWIN
  #if !defined(ELPP_INTERNAL_DEBUGGING_OUT_INFO)
  #  define ELPP_INTERNAL_DEBUGGING_OUT_INFO std::cout
  #endif // !defined(ELPP_INTERNAL_DEBUGGING_OUT)
  #if !defined(ELPP_INTERNAL_DEBUGGING_OUT_ERROR)
  #  define ELPP_INTERNAL_DEBUGGING_OUT_ERROR std::cerr
  #endif // !defined(ELPP_INTERNAL_DEBUGGING_OUT)
  #if !defined(ELPP_INTERNAL_DEBUGGING_ENDL)
  #  define ELPP_INTERNAL_DEBUGGING_ENDL std::endl
  #endif // !defined(ELPP_INTERNAL_DEBUGGING_OUT)
  #if !defined(ELPP_INTERNAL_DEBUGGING_MSG)
  #  define ELPP_INTERNAL_DEBUGGING_MSG(msg) msg
  #endif // !defined(ELPP_INTERNAL_DEBUGGING_OUT)
  // Internal Assertions and errors
  #if !defined(ELPP_DISABLE_ASSERT)
  #  if (defined(ELPP_DEBUG_ASSERT_FAILURE))
  #    define ELPP_ASSERT(expr, msg) if (!(expr)) { \
  std::stringstream internalInfoStream; internalInfoStream << msg; \
  ELPP_INTERNAL_DEBUGGING_OUT_ERROR \
  << "EASYLOGGING++ ASSERTION FAILED (LINE: " << __LINE__ << ") [" #expr << "] WITH MESSAGE \"" \
  << ELPP_INTERNAL_DEBUGGING_MSG(internalInfoStream.str()) << "\"" << ELPP_INTERNAL_DEBUGGING_ENDL; base::utils::abort(1, \
  "ELPP Assertion failure, please define ELPP_DEBUG_ASSERT_FAILURE"); }
  #  else
  #    define ELPP_ASSERT(expr, msg) if (!(expr)) { \
  std::stringstream internalInfoStream; internalInfoStream << msg; \
  ELPP_INTERNAL_DEBUGGING_OUT_ERROR\
  << "ASSERTION FAILURE FROM EASYLOGGING++ (LINE: " \
  << __LINE__ << ") [" #expr << "] WITH MESSAGE \"" << ELPP_INTERNAL_DEBUGGING_MSG(internalInfoStream.str()) << "\"" \
  << ELPP_INTERNAL_DEBUGGING_ENDL; }
  #  endif  // (defined(ELPP_DEBUG_ASSERT_FAILURE))
  #else
  #  define ELPP_ASSERT(x, y)
  #endif  //(!defined(ELPP_DISABLE_ASSERT)
  #if ELPP_COMPILER_MSVC
  #  define ELPP_INTERNAL_DEBUGGING_WRITE_PERROR \
  { char buff[256]; strerror_s(buff, 256, errno); \
  ELPP_INTERNAL_DEBUGGING_OUT_ERROR << ": " << buff << " [" << errno << "]";} (void)0
  #else
  #  define ELPP_INTERNAL_DEBUGGING_WRITE_PERROR \
  ELPP_INTERNAL_DEBUGGING_OUT_ERROR << ": " << strerror(errno) << " [" << errno << "]"; (void)0
  #endif  // ELPP_COMPILER_MSVC
  #if defined(ELPP_DEBUG_ERRORS)
  #  if !defined(ELPP_INTERNAL_ERROR)
  #    define ELPP_INTERNAL_ERROR(msg, pe) { \
  std::stringstream internalInfoStream; internalInfoStream << "<ERROR> " << msg; \
  ELPP_INTERNAL_DEBUGGING_OUT_ERROR \
  << "ERROR FROM EASYLOGGING++ (LINE: " << __LINE__ << ") " \
  << ELPP_INTERNAL_DEBUGGING_MSG(internalInfoStream.str()) << ELPP_INTERNAL_DEBUGGING_ENDL; \
  if (pe) { ELPP_INTERNAL_DEBUGGING_OUT_ERROR << "    "; ELPP_INTERNAL_DEBUGGING_WRITE_PERROR; }} (void)0
  #  endif
  #else
  #  undef ELPP_INTERNAL_INFO
  #  define ELPP_INTERNAL_ERROR(msg, pe)
  #endif  // defined(ELPP_DEBUG_ERRORS)
  #if (defined(ELPP_DEBUG_INFO))
  #  if !(defined(ELPP_INTERNAL_INFO_LEVEL))
  #    define ELPP_INTERNAL_INFO_LEVEL 9
  #  endif  // !(defined(ELPP_INTERNAL_INFO_LEVEL))
  #  if !defined(ELPP_INTERNAL_INFO)
  #    define ELPP_INTERNAL_INFO(lvl, msg) { if (lvl <= ELPP_INTERNAL_INFO_LEVEL) { \
  std::stringstream internalInfoStream; internalInfoStream << "<INFO> " << msg; \
  ELPP_INTERNAL_DEBUGGING_OUT_INFO << ELPP_INTERNAL_DEBUGGING_MSG(internalInfoStream.str()) \
  << ELPP_INTERNAL_DEBUGGING_ENDL; }}
  #  endif
  #else
  #  undef ELPP_INTERNAL_INFO
  #  define ELPP_INTERNAL_INFO(lvl, msg)
  #endif  // (defined(ELPP_DEBUG_INFO))
  #if (defined(ELPP_FEATURE_ALL)) || (defined(ELPP_FEATURE_CRASH_LOG))
  #  if (ELPP_COMPILER_GCC && !ELPP_MINGW && !ELPP_OS_ANDROID && !ELPP_OS_EMSCRIPTEN)
  #    define ELPP_STACKTRACE 1
  #  else
  #      if ELPP_COMPILER_MSVC
  #         pragma message("Stack trace not available for this compiler")
  #      else
  #         warning "Stack trace not available for this compiler";
  #      endif  // ELPP_COMPILER_MSVC
  #    define ELPP_STACKTRACE 0
  #  endif  // ELPP_COMPILER_GCC
  #else
  #    define ELPP_STACKTRACE 0
  #endif  // (defined(ELPP_FEATURE_ALL)) || (defined(ELPP_FEATURE_CRASH_LOG))
  // Miscellaneous macros
  #define ELPP_UNUSED(x) (void)x
  #if ELPP_OS_UNIX
  // Log file permissions for unix-based systems
  #  define ELPP_LOG_PERMS S_IRUSR | S_IWUSR | S_IXUSR | S_IWGRP | S_IRGRP | S_IXGRP | S_IWOTH | S_IXOTH | S_IROTH
  #endif  // ELPP_OS_UNIX
  #if defined(ELPP_AS_DLL) && ELPP_COMPILER_MSVC
  #  if defined(ELPP_EXPORT_SYMBOLS)
  #    define ELPP_EXPORT __declspec(dllexport)
  #  else
  #    define ELPP_EXPORT __declspec(dllimport)
  #  endif  // defined(ELPP_EXPORT_SYMBOLS)
  #else
  #  define ELPP_EXPORT
  #endif  // defined(ELPP_AS_DLL) && ELPP_COMPILER_MSVC
  // Some special functions that are VC++ specific
  #undef STRTOK
  #undef STRERROR
  #undef STRCAT
  #undef STRCPY
  #if ELPP_CRT_DBG_WARNINGS
  #  define STRTOK(a, b, c) strtok_s(a, b, c)
  #  define STRERROR(a, b, c) strerror_s(a, b, c)
  #  define STRCAT(a, b, len) strcat_s(a, len, b)
  #  define STRCPY(a, b, len) strcpy_s(a, len, b)
  #else
  #  define STRTOK(a, b, c) strtok(a, b)
  #  define STRERROR(a, b, c) strerror(c)
  #  define STRCAT(a, b, len) strcat(a, b)
  #  define STRCPY(a, b, len) strcpy(a, b)
  #endif
  // Compiler specific support evaluations
  #if (ELPP_MINGW && !defined(ELPP_FORCE_USE_STD_THREAD))
  #  define ELPP_USE_STD_THREADING 0
  #else
  #  if ((ELPP_COMPILER_CLANG && defined(ELPP_CLANG_SUPPORTS_THREAD)) || \
         (!ELPP_COMPILER_CLANG && defined(ELPP_CXX11)) || \
         defined(ELPP_FORCE_USE_STD_THREAD))
  #    define ELPP_USE_STD_THREADING 1
  #  else
  #    define ELPP_USE_STD_THREADING 0
  #  endif
  #endif
  #undef ELPP_FINAL
  #if ELPP_COMPILER_INTEL || (ELPP_GCC_VERSION < 40702)
  #  define ELPP_FINAL
  #else
  #  define ELPP_FINAL final
  #endif  // ELPP_COMPILER_INTEL || (ELPP_GCC_VERSION < 40702)
  #if defined(ELPP_EXPERIMENTAL_ASYNC)
  #  define ELPP_ASYNC_LOGGING 1
  #else
  #  define ELPP_ASYNC_LOGGING 0
  #endif // defined(ELPP_EXPERIMENTAL_ASYNC)
  #if defined(ELPP_THREAD_SAFE) || ELPP_ASYNC_LOGGING
  #  define ELPP_THREADING_ENABLED 1
  #else
  #  define ELPP_THREADING_ENABLED 0
  #endif  // defined(ELPP_THREAD_SAFE) || ELPP_ASYNC_LOGGING
  // Function macro ELPP_FUNC
  #undef ELPP_FUNC
  #if ELPP_COMPILER_MSVC  // Visual C++
  #  define ELPP_FUNC __FUNCSIG__
  #elif ELPP_COMPILER_GCC  // GCC
  #  define ELPP_FUNC __PRETTY_FUNCTION__
  #elif ELPP_COMPILER_INTEL  // Intel C++
  #  define ELPP_FUNC __PRETTY_FUNCTION__
  #elif ELPP_COMPILER_CLANG  // Clang++
  #  define ELPP_FUNC __PRETTY_FUNCTION__
  #else
  #  if defined(__func__)
  #    define ELPP_FUNC __func__
  #  else
  #    define ELPP_FUNC ""
  #  endif  // defined(__func__)
  #endif  // defined(_MSC_VER)
  #undef ELPP_VARIADIC_TEMPLATES_SUPPORTED
  // Keep following line commented until features are fixed
  #define ELPP_VARIADIC_TEMPLATES_SUPPORTED \
  (ELPP_COMPILER_GCC || ELPP_COMPILER_CLANG || ELPP_COMPILER_INTEL || (ELPP_COMPILER_MSVC && _MSC_VER >= 1800))
  // Logging Enable/Disable macros
  #if defined(ELPP_DISABLE_LOGS)
  #define ELPP_LOGGING_ENABLED 0
  #else
  #define ELPP_LOGGING_ENABLED 1
  #endif
  #if (!defined(ELPP_DISABLE_DEBUG_LOGS) && (ELPP_LOGGING_ENABLED))
  #  define ELPP_DEBUG_LOG 1
  #else
  #  define ELPP_DEBUG_LOG 0
  #endif  // (!defined(ELPP_DISABLE_DEBUG_LOGS) && (ELPP_LOGGING_ENABLED))
  #if (!defined(ELPP_DISABLE_INFO_LOGS) && (ELPP_LOGGING_ENABLED))
  #  define ELPP_INFO_LOG 1
  #else
  #  define ELPP_INFO_LOG 0
  #endif  // (!defined(ELPP_DISABLE_INFO_LOGS) && (ELPP_LOGGING_ENABLED))
  #if (!defined(ELPP_DISABLE_WARNING_LOGS) && (ELPP_LOGGING_ENABLED))
  #  define ELPP_WARNING_LOG 1
  #else
  #  define ELPP_WARNING_LOG 0
  #endif  // (!defined(ELPP_DISABLE_WARNING_LOGS) && (ELPP_LOGGING_ENABLED))
  #if (!defined(ELPP_DISABLE_ERROR_LOGS) && (ELPP_LOGGING_ENABLED))
  #  define ELPP_ERROR_LOG 1
  #else
  #  define ELPP_ERROR_LOG 0
  #endif  // (!defined(ELPP_DISABLE_ERROR_LOGS) && (ELPP_LOGGING_ENABLED))
  #if (!defined(ELPP_DISABLE_FATAL_LOGS) && (ELPP_LOGGING_ENABLED))
  #  define ELPP_FATAL_LOG 1
  #else
  #  define ELPP_FATAL_LOG 0
  #endif  // (!defined(ELPP_DISABLE_FATAL_LOGS) && (ELPP_LOGGING_ENABLED))
  #if (!defined(ELPP_DISABLE_TRACE_LOGS) && (ELPP_LOGGING_ENABLED))
  #  define ELPP_TRACE_LOG 1
  #else
  #  define ELPP_TRACE_LOG 0
  #endif  // (!defined(ELPP_DISABLE_TRACE_LOGS) && (ELPP_LOGGING_ENABLED))
  #if (!defined(ELPP_DISABLE_VERBOSE_LOGS) && (ELPP_LOGGING_ENABLED))
  #  define ELPP_VERBOSE_LOG 1
  #else
  #  define ELPP_VERBOSE_LOG 0
  #endif  // (!defined(ELPP_DISABLE_VERBOSE_LOGS) && (ELPP_LOGGING_ENABLED))
  #if (!(ELPP_CXX0X || ELPP_CXX11))
  #   error "C++0x (or higher) support not detected! (Is `-std=c++11' missing?)"
  #endif  // (!(ELPP_CXX0X || ELPP_CXX11))
  // Headers
  #if defined(ELPP_SYSLOG)
  #   include <syslog.h>
  #endif  // defined(ELPP_SYSLOG)
  #include <ctime>
  #include <cstring>
  #include <cstdlib>
  #include <cctype>
  #include <cwchar>
  #include <csignal>
  #include <cerrno>
  #include <cstdarg>
  #if defined(ELPP_UNICODE)
  #   include <locale>
  #  if ELPP_OS_WINDOWS
  #      include <codecvt>
  #  endif // ELPP_OS_WINDOWS
  #endif  // defined(ELPP_UNICODE)
  #if ELPP_STACKTRACE
  #   include <cxxabi.h>
  #   include <execinfo.h>
  #endif  // ELPP_STACKTRACE
  #if ELPP_OS_ANDROID
  #   include <sys/system_properties.h>
  #endif  // ELPP_OS_ANDROID
  #if ELPP_OS_UNIX
  #   include <sys/stat.h>
  #   include <sys/time.h>
  #elif ELPP_OS_WINDOWS
  #   include <direct.h>
  #   include <windows.h>
  #  if defined(WIN32_LEAN_AND_MEAN)
  #      if defined(ELPP_WINSOCK2)
  #         include <winsock2.h>
  #      else
  #         include <winsock.h>
  #      endif // defined(ELPP_WINSOCK2)
  #  endif // defined(WIN32_LEAN_AND_MEAN)
  #endif  // ELPP_OS_UNIX
  #include <string>
  #include <vector>
  #include <map>
  #include <unordered_map>
  #include <utility>
  #include <functional>
  #include <algorithm>
  #include <fstream>
  #include <iostream>
  #include <sstream>
  #include <memory>
  #include <type_traits>
  #if ELPP_THREADING_ENABLED
  #  if ELPP_USE_STD_THREADING
  #      include <mutex>
  #      include <thread>
  #  else
  #      if ELPP_OS_UNIX
  #         include <pthread.h>
  #      endif  // ELPP_OS_UNIX
  #  endif  // ELPP_USE_STD_THREADING
  #endif  // ELPP_THREADING_ENABLED
  #if ELPP_ASYNC_LOGGING
  #  if defined(ELPP_NO_SLEEP_FOR)
  #      include <unistd.h>
  #  endif  // defined(ELPP_NO_SLEEP_FOR)
  #   include <thread>
  #   include <queue>
  #   include <condition_variable>
  #endif  // ELPP_ASYNC_LOGGING
  #if defined(ELPP_STL_LOGGING)
  // For logging STL based templates
  #   include <list>
  #   include <queue>
  #   include <deque>
  #   include <set>
  #   include <bitset>
  #   include <stack>
  #  if defined(ELPP_LOG_STD_ARRAY)
  #      include <array>
  #  endif  // defined(ELPP_LOG_STD_ARRAY)
  #  if defined(ELPP_LOG_UNORDERED_SET)
  #      include <unordered_set>
  #  endif  // defined(ELPP_UNORDERED_SET)
  #endif  // defined(ELPP_STL_LOGGING)
  #if defined(ELPP_QT_LOGGING)
  // For logging Qt based classes & templates
  #   include <QString>
  #   include <QByteArray>
  #   include <QVector>
  #   include <QList>
  #   include <QPair>
  #   include <QMap>
  #   include <QQueue>
  #   include <QSet>
  #   include <QLinkedList>
  #   include <QHash>
  #   include <QMultiHash>
  #   include <QStack>
  #endif  // defined(ELPP_QT_LOGGING)
  #if defined(ELPP_BOOST_LOGGING)
  // For logging boost based classes & templates
  #   include <boost/container/vector.hpp>
  #   include <boost/container/stable_vector.hpp>
  #   include <boost/container/list.hpp>
  #   include <boost/container/deque.hpp>
  #   include <boost/container/map.hpp>
  #   include <boost/container/flat_map.hpp>
  #   include <boost/container/set.hpp>
  #   include <boost/container/flat_set.hpp>
  #endif  // defined(ELPP_BOOST_LOGGING)
  #if defined(ELPP_WXWIDGETS_LOGGING)
  // For logging wxWidgets based classes & templates
  #   include <wx/vector.h>
  #endif  // defined(ELPP_WXWIDGETS_LOGGING)
  #if defined(ELPP_UTC_DATETIME)
  #   define elpptime_r gmtime_r
  #   define elpptime_s gmtime_s
  #   define elpptime   gmtime
  #else
  #   define elpptime_r localtime_r
  #   define elpptime_s localtime_s
  #   define elpptime   localtime
  #endif  // defined(ELPP_UTC_DATETIME)
  // Forward declarations
  namespace el {
  class Logger;
  class LogMessage;
  class PerformanceTrackingData;
  class Loggers;
  class Helpers;
  template <typename T> class Callback;
  class LogDispatchCallback;
  class PerformanceTrackingCallback;
  class LoggerRegistrationCallback;
  class LogDispatchData;
  namespace base {
  class Storage;
  class RegisteredLoggers;
  class PerformanceTracker;
  class MessageBuilder;
  class Writer;
  class PErrorWriter;
  class LogDispatcher;
  class DefaultLogBuilder;
  class DefaultLogDispatchCallback;
  #if ELPP_ASYNC_LOGGING
  class AsyncLogDispatchCallback;
  class AsyncDispatchWorker;
  #endif // ELPP_ASYNC_LOGGING
  class DefaultPerformanceTrackingCallback;
  }  // namespace base
  }  // namespace el
  /// @brief Easylogging++ entry namespace
  namespace el {
  /// @brief Namespace containing base/internal functionality used by Easylogging++
  namespace base {
  /// @brief Data types used by Easylogging++
  namespace type {
  #undef ELPP_LITERAL
  #undef ELPP_STRLEN
  #undef ELPP_COUT
  #if defined(ELPP_UNICODE)
  #  define ELPP_LITERAL(txt) L##txt
  #  define ELPP_STRLEN wcslen
  #  if defined ELPP_CUSTOM_COUT
  #    define ELPP_COUT ELPP_CUSTOM_COUT
  #  else
  #    define ELPP_COUT std::wcout
  #  endif  // defined ELPP_CUSTOM_COUT
  typedef wchar_t char_t;
  typedef std::wstring string_t;
  typedef std::wstringstream stringstream_t;
  typedef std::wfstream fstream_t;
  typedef std::wostream ostream_t;
  #else
  #  define ELPP_LITERAL(txt) txt
  #  define ELPP_STRLEN strlen
  #  if defined ELPP_CUSTOM_COUT
  #    define ELPP_COUT ELPP_CUSTOM_COUT
  #  else
  #    define ELPP_COUT std::cout
  #  endif  // defined ELPP_CUSTOM_COUT
  typedef char char_t;
  typedef std::string string_t;
  typedef std::stringstream stringstream_t;
  typedef std::fstream fstream_t;
  typedef std::ostream ostream_t;
  #endif  // defined(ELPP_UNICODE)
  #if defined(ELPP_CUSTOM_COUT_LINE)
  #  define ELPP_COUT_LINE(logLine) ELPP_CUSTOM_COUT_LINE(logLine)
  #else
  #  define ELPP_COUT_LINE(logLine) logLine << std::flush
  #endif // defined(ELPP_CUSTOM_COUT_LINE)
  typedef unsigned int EnumType;
  typedef unsigned short VerboseLevel;
  typedef unsigned long int LineNumber;
  typedef std::shared_ptr<base::Storage> StoragePointer;
  typedef std::shared_ptr<LogDispatchCallback> LogDispatchCallbackPtr;
  typedef std::shared_ptr<PerformanceTrackingCallback> PerformanceTrackingCallbackPtr;
  typedef std::shared_ptr<LoggerRegistrationCallback> LoggerRegistrationCallbackPtr;
  typedef std::unique_ptr<el::base::PerformanceTracker> PerformanceTrackerPtr;
  }  // namespace type
  /// @brief Internal helper class that prevent copy constructor for class
  ///
  /// @detail When using this class simply inherit it privately
  class NoCopy {
   protected:
    NoCopy(void) {}
   private:
    NoCopy(const NoCopy&);
    NoCopy& operator=(const NoCopy&);
  };
  /// @brief Internal helper class that makes all default constructors private.
  ///
  /// @detail This prevents initializing class making it static unless an explicit constructor is declared.
  /// When using this class simply inherit it privately
  class StaticClass {
   private:
    StaticClass(void);
    StaticClass(const StaticClass&);
    StaticClass& operator=(const StaticClass&);
  };
  }  // namespace base
  /// @brief Represents enumeration for severity level used to determine level of logging
  ///
  /// @detail With Easylogging++, developers may disable or enable any level regardless of
  /// what the severity is. Or they can choose to log using hierarchical logging flag
  enum class Level : base::type::EnumType {
    /// @brief Generic level that represents all the levels. Useful when setting global configuration for all levels
    Global = 1,
    /// @brief Information that can be useful to back-trace certain events - mostly useful than debug logs.
    Trace = 2,
    /// @brief Informational events most useful for developers to debug application
    Debug = 4,
    /// @brief Severe error information that will presumably abort application
    Fatal = 8,
    /// @brief Information representing errors in application but application will keep running
    Error = 16,
    /// @brief Useful when application has potentially harmful situtaions
    Warning = 32,
    /// @brief Information that can be highly useful and vary with verbose logging level.
    Verbose = 64,
    /// @brief Mainly useful to represent current progress of application
    Info = 128,
    /// @brief Represents unknown level
    Unknown = 1010
  };
  } // namespace el
  namespace std {
  template<> struct hash<el::Level> {
   public:
    std::size_t operator()(const el::Level& l) const {
      return hash<el::base::type::EnumType> {}(static_cast<el::base::type::EnumType>(l));
    }
  };
  }
  namespace el {
  /// @brief Static class that contains helper functions for el::Level
  class LevelHelper : base::StaticClass {
   public:
    /// @brief Represents minimum valid level. Useful when iterating through enum.
    static const base::type::EnumType kMinValid = static_cast<base::type::EnumType>(Level::Trace);
    /// @brief Represents maximum valid level. This is used internally and you should not need it.
    static const base::type::EnumType kMaxValid = static_cast<base::type::EnumType>(Level::Info);
    /// @brief Casts level to int, useful for iterating through enum.
    static base::type::EnumType castToInt(Level level) {
      return static_cast<base::type::EnumType>(level);
    }
    /// @brief Casts int(ushort) to level, useful for iterating through enum.
    static Level castFromInt(base::type::EnumType l) {
      return static_cast<Level>(l);
    }
    /// @brief Converts level to associated const char*
    /// @return Upper case string based level.
    static const char* convertToString(Level level);
    /// @brief Converts from levelStr to Level
    /// @param levelStr Upper case string based level.
    ///        Lower case is also valid but providing upper case is recommended.
    static Level convertFromString(const char* levelStr);
    /// @brief Applies specified function to each level starting from startIndex
    /// @param startIndex initial value to start the iteration from. This is passed as pointer and
    ///        is left-shifted so this can be used inside function (fn) to represent current level.
    /// @param fn function to apply with each level. This bool represent whether or not to stop iterating through levels.
    static void forEachLevel(base::type::EnumType* startIndex, const std::function<bool(void)>& fn);
  };
  /// @brief Represents enumeration of ConfigurationType used to configure or access certain aspect
  /// of logging
  enum class ConfigurationType : base::type::EnumType {
    /// @brief Determines whether or not corresponding level and logger of logging is enabled
    /// You may disable all logs by using el::Level::Global
    Enabled = 1,
    /// @brief Whether or not to write corresponding log to log file
    ToFile = 2,
    /// @brief Whether or not to write corresponding level and logger log to standard output.
    /// By standard output meaning termnal, command prompt etc
    ToStandardOutput = 4,
    /// @brief Determines format of logging corresponding level and logger.
    Format = 8,
    /// @brief Determines log file (full path) to write logs to for correponding level and logger
    Filename = 16,
    /// @brief Specifies precision of the subsecond part. It should be within range (1-6).
    SubsecondPrecision = 32,
    /// @brief Alias of SubsecondPrecision (for backward compatibility)
    MillisecondsWidth = SubsecondPrecision,
    /// @brief Determines whether or not performance tracking is enabled.
    ///
    /// @detail This does not depend on logger or level. Performance tracking always uses 'performance' logger
    PerformanceTracking = 64,
    /// @brief Specifies log file max size.
    ///
    /// @detail If file size of corresponding log file (for corresponding level) is >= specified size, log file will
    /// be truncated and re-initiated.
    MaxLogFileSize = 128,
    /// @brief Specifies number of log entries to hold until we flush pending log data
    LogFlushThreshold = 256,
    /// @brief Whether or not to write corresponding level and
    /// logger log to syslog.
    ToSyslog = 512,
    /// @brief Represents unknown configuration
    Unknown = 1010
  };
  /// @brief Static class that contains helper functions for el::ConfigurationType
  class ConfigurationTypeHelper : base::StaticClass {
   public:
    /// @brief Represents minimum valid configuration type. Useful when iterating through enum.
    static const base::type::EnumType kMinValid = static_cast<base::type::EnumType>(ConfigurationType::Enabled);
    /// @brief Represents maximum valid configuration type. This is used internally and you should not need it.
    static const base::type::EnumType kMaxValid = static_cast<base::type::EnumType>(ConfigurationType::MaxLogFileSize);
    /// @brief Casts configuration type to int, useful for iterating through enum.
    static base::type::EnumType castToInt(ConfigurationType configurationType) {
      return static_cast<base::type::EnumType>(configurationType);
    }
    /// @brief Casts int(ushort) to configurationt type, useful for iterating through enum.
    static ConfigurationType castFromInt(base::type::EnumType c) {
      return static_cast<ConfigurationType>(c);
    }
    /// @brief Converts configuration type to associated const char*
    /// @returns Upper case string based configuration type.
    static const char* convertToString(ConfigurationType configurationType);
    /// @brief Converts from configStr to ConfigurationType
    /// @param configStr Upper case string based configuration type.
    ///        Lower case is also valid but providing upper case is recommended.
    static ConfigurationType convertFromString(const char* configStr);
    /// @brief Applies specified function to each configuration type starting from startIndex
    /// @param startIndex initial value to start the iteration from. This is passed by pointer and is left-shifted
    ///        so this can be used inside function (fn) to represent current configuration type.
    /// @param fn function to apply with each configuration type.
    ///        This bool represent whether or not to stop iterating through configurations.
    static inline void forEachConfigType(base::type::EnumType* startIndex, const std::function<bool(void)>& fn);
  };
  /// @brief Flags used while writing logs. This flags are set by user
  enum class LoggingFlag : base::type::EnumType {
    /// @brief Makes sure we have new line for each container log entry
    NewLineForContainer = 1,
    /// @brief Makes sure if -vmodule is used and does not specifies a module, then verbose
    /// logging is allowed via that module.
    AllowVerboseIfModuleNotSpecified = 2,
    /// @brief When handling crashes by default, detailed crash reason will be logged as well
    LogDetailedCrashReason = 4,
    /// @brief Allows to disable application abortion when logged using FATAL level
    DisableApplicationAbortOnFatalLog = 8,
    /// @brief Flushes log with every log-entry (performance sensative) - Disabled by default
    ImmediateFlush = 16,
    /// @brief Enables strict file rolling
    StrictLogFileSizeCheck = 32,
    /// @brief Make terminal output colorful for supported terminals
    ColoredTerminalOutput = 64,
    /// @brief Supports use of multiple logging in same macro, e.g, CLOG(INFO, "default", "network")
    MultiLoggerSupport = 128,
    /// @brief Disables comparing performance tracker's checkpoints
    DisablePerformanceTrackingCheckpointComparison = 256,
    /// @brief Disable VModules
    DisableVModules = 512,
    /// @brief Disable VModules extensions
    DisableVModulesExtensions = 1024,
    /// @brief Enables hierarchical logging
    HierarchicalLogging = 2048,
    /// @brief Creates logger automatically when not available
    CreateLoggerAutomatically = 4096,
    /// @brief Adds spaces b/w logs that separated by left-shift operator
    AutoSpacing = 8192,
    /// @brief Preserves time format and does not convert it to sec, hour etc (performance tracking only)
    FixedTimeFormat = 16384,
    /// @brief Ignore SIGINT or crash
    IgnoreSigInt = 32768,
    /// @brief Set the log to print integer on decimal format with every log-entry
    ForceDecBase = 65536,
    /// @brief Set the log to print the base of integer value according to iostream base flag
    ShowBase = 131072,
    /// @brief Set the log to print the booleans as "true" or "false" instead of "1" or "0"
    BoolAlpha = 262144,
  };
  namespace base {
  /// @brief Namespace containing constants used internally.
  namespace consts {
  static const char  kFormatSpecifierCharValue               =      'v';
  static const char  kFormatSpecifierChar                    =      '%';
  static const unsigned int kMaxLogPerCounter                =      100000;
  static const unsigned int kMaxLogPerContainer              =      100;
  static const unsigned int kDefaultSubsecondPrecision       =      3;
  
  #ifdef ELPP_DEFAULT_LOGGER
  static const char* kDefaultLoggerId                        =      ELPP_DEFAULT_LOGGER;
  #else
  static const char* kDefaultLoggerId                        =      "default";
  #endif
  
  #if defined(ELPP_FEATURE_ALL) || defined(ELPP_FEATURE_PERFORMANCE_TRACKING)
  #ifdef ELPP_DEFAULT_PERFORMANCE_LOGGER
  static const char* kPerformanceLoggerId                    =      ELPP_DEFAULT_PERFORMANCE_LOGGER;
  #else
  static const char* kPerformanceLoggerId                    =      "performance";
  #endif // ELPP_DEFAULT_PERFORMANCE_LOGGER
  #endif
  
  #if defined(ELPP_SYSLOG)
  static const char* kSysLogLoggerId __attribute__((unused)) =      "syslog";
  #endif  // defined(ELPP_SYSLOG)
  
  #if ELPP_OS_WINDOWS
  static const char* kFilePathSeperator                      =      "\\";
  #else
  static const char* kFilePathSeperator                      =      "/";
  #endif  // ELPP_OS_WINDOWS
  
  static const std::size_t kSourceFilenameMaxLength          =      100;
  static const std::size_t kSourceLineMaxLength              =      10;
  static const Level kPerformanceTrackerDefaultLevel         =      Level::Info;
  const struct {
    double value;
    const base::type::char_t* unit;
  } kTimeFormats[] = {
    { 1000.0f, ELPP_LITERAL("us") },
    { 1000.0f, ELPP_LITERAL("ms") },
    { 60.0f, ELPP_LITERAL("seconds") },
    { 60.0f, ELPP_LITERAL("minutes") },
    { 24.0f, ELPP_LITERAL("hours") },
    { 7.0f, ELPP_LITERAL("days") }
  };
  static const int kTimeFormatsCount                           =      sizeof(kTimeFormats) / sizeof(kTimeFormats[0]);
  const struct {
    int numb;
    const char* name;
    const char* brief;
    const char* detail;
  } kCrashSignals[] = {
    // NOTE: Do not re-order, if you do please check CrashHandler(bool) constructor and CrashHandler::setHandler(..)
    {
      SIGABRT, "SIGABRT", "Abnormal termination",
      "Program was abnormally terminated."
    },
    {
      SIGFPE, "SIGFPE", "Erroneous arithmetic operation",
      "Arithemetic operation issue such as division by zero or operation resulting in overflow."
    },
    {
      SIGILL, "SIGILL", "Illegal instruction",
      "Generally due to a corruption in the code or to an attempt to execute data."
    },
    {
      SIGSEGV, "SIGSEGV", "Invalid access to memory",
      "Program is trying to read an invalid (unallocated, deleted or corrupted) or inaccessible memory."
    },
    {
      SIGINT, "SIGINT", "Interactive attention signal",
      "Interruption generated (generally) by user or operating system."
    },
  };
  static const int kCrashSignalsCount                          =      sizeof(kCrashSignals) / sizeof(kCrashSignals[0]);
  }  // namespace consts
  }  // namespace base
  typedef std::function<void(const char*, std::size_t)> PreRollOutCallback;
  namespace base {
  static inline void defaultPreRollOutCallback(const char*, std::size_t) {}
  /// @brief Enum to represent timestamp unit
  enum class TimestampUnit : base::type::EnumType {
    Microsecond = 0, Millisecond = 1, Second = 2, Minute = 3, Hour = 4, Day = 5
  };
  /// @brief Format flags used to determine specifiers that are active for performance improvements.
  enum class FormatFlags : base::type::EnumType {
    DateTime = 1 << 1,
    LoggerId = 1 << 2,
    File = 1 << 3,
    Line = 1 << 4,
    Location = 1 << 5,
    Function = 1 << 6,
    User = 1 << 7,
    Host = 1 << 8,
    LogMessage = 1 << 9,
    VerboseLevel = 1 << 10,
    AppName = 1 << 11,
    ThreadId = 1 << 12,
    Level = 1 << 13,
    FileBase = 1 << 14,
    LevelShort = 1 << 15
  };
  /// @brief A subsecond precision class containing actual width and offset of the subsecond part
  class SubsecondPrecision {
   public:
    SubsecondPrecision(void) {
      init(base::consts::kDefaultSubsecondPrecision);
    }
    explicit SubsecondPrecision(int width) {
      init(width);
    }
    bool operator==(const SubsecondPrecision& ssPrec) {
      return m_width == ssPrec.m_width && m_offset == ssPrec.m_offset;
    }
    int m_width;
    unsigned int m_offset;
   private:
    void init(int width);
  };
  /// @brief Type alias of SubsecondPrecision
  typedef SubsecondPrecision MillisecondsWidth;
  /// @brief Namespace containing utility functions/static classes used internally
  namespace utils {
  /// @brief Deletes memory safely and points to null
  template <typename T>
  static
  typename std::enable_if<std::is_pointer<T*>::value, void>::type
  safeDelete(T*& pointer) {
    if (pointer == nullptr)
      return;
    delete pointer;
    pointer = nullptr;
  }
  /// @brief Bitwise operations for C++11 strong enum class. This casts e into Flag_T and returns value after bitwise operation
  /// Use these function as <pre>flag = bitwise::Or<MyEnum>(MyEnum::val1, flag);</pre>
  namespace bitwise {
  template <typename Enum>
  static inline base::type::EnumType And(Enum e, base::type::EnumType flag) {
    return static_cast<base::type::EnumType>(flag) & static_cast<base::type::EnumType>(e);
  }
  template <typename Enum>
  static inline base::type::EnumType Not(Enum e, base::type::EnumType flag) {
    return static_cast<base::type::EnumType>(flag) & ~(static_cast<base::type::EnumType>(e));
  }
  template <typename Enum>
  static inline base::type::EnumType Or(Enum e, base::type::EnumType flag) {
    return static_cast<base::type::EnumType>(flag) | static_cast<base::type::EnumType>(e);
  }
  }  // namespace bitwise
  template <typename Enum>
  static inline void addFlag(Enum e, base::type::EnumType* flag) {
    *flag = base::utils::bitwise::Or<Enum>(e, *flag);
  }
  template <typename Enum>
  static inline void removeFlag(Enum e, base::type::EnumType* flag) {
    *flag = base::utils::bitwise::Not<Enum>(e, *flag);
  }
  template <typename Enum>
  static inline bool hasFlag(Enum e, base::type::EnumType flag) {
    return base::utils::bitwise::And<Enum>(e, flag) > 0x0;
  }
  }  // namespace utils
  namespace threading {
  #if ELPP_THREADING_ENABLED
  #  if !ELPP_USE_STD_THREADING
  namespace internal {
  /// @brief A mutex wrapper for compiler that dont yet support std::recursive_mutex
  class Mutex : base::NoCopy {
   public:
    Mutex(void) {
  #  if ELPP_OS_UNIX
      pthread_mutexattr_t attr;
      pthread_mutexattr_init(&attr);
      pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
      pthread_mutex_init(&m_underlyingMutex, &attr);
      pthread_mutexattr_destroy(&attr);
  #  elif ELPP_OS_WINDOWS
      InitializeCriticalSection(&m_underlyingMutex);
  #  endif  // ELPP_OS_UNIX
    }
  
    virtual ~Mutex(void) {
  #  if ELPP_OS_UNIX
      pthread_mutex_destroy(&m_underlyingMutex);
  #  elif ELPP_OS_WINDOWS
      DeleteCriticalSection(&m_underlyingMutex);
  #  endif  // ELPP_OS_UNIX
    }
  
    inline void lock(void) {
  #  if ELPP_OS_UNIX
      pthread_mutex_lock(&m_underlyingMutex);
  #  elif ELPP_OS_WINDOWS
      EnterCriticalSection(&m_underlyingMutex);
  #  endif  // ELPP_OS_UNIX
    }
  
    inline bool try_lock(void) {
  #  if ELPP_OS_UNIX
      return (pthread_mutex_trylock(&m_underlyingMutex) == 0);
  #  elif ELPP_OS_WINDOWS
      return TryEnterCriticalSection(&m_underlyingMutex);
  #  endif  // ELPP_OS_UNIX
    }
  
    inline void unlock(void) {
  #  if ELPP_OS_UNIX
      pthread_mutex_unlock(&m_underlyingMutex);
  #  elif ELPP_OS_WINDOWS
      LeaveCriticalSection(&m_underlyingMutex);
  #  endif  // ELPP_OS_UNIX
    }
  
   private:
  #  if ELPP_OS_UNIX
    pthread_mutex_t m_underlyingMutex;
  #  elif ELPP_OS_WINDOWS
    CRITICAL_SECTION m_underlyingMutex;
  #  endif  // ELPP_OS_UNIX
  };
  /// @brief Scoped lock for compiler that dont yet support std::lock_guard
  template <typename M>
  class ScopedLock : base::NoCopy {
   public:
    explicit ScopedLock(M& mutex) {
      m_mutex = &mutex;
      m_mutex->lock();
    }
  
    virtual ~ScopedLock(void) {
      m_mutex->unlock();
    }
   private:
    M* m_mutex;
    ScopedLock(void);
  };
  } // namespace internal
  typedef base::threading::internal::Mutex Mutex;
  typedef base::threading::internal::ScopedLock<base::threading::Mutex> ScopedLock;
  #  else
  typedef std::recursive_mutex Mutex;
  typedef std::lock_guard<base::threading::Mutex> ScopedLock;
  #  endif  // !ELPP_USE_STD_THREADING
  #else
  namespace internal {
  /// @brief Mutex wrapper used when multi-threading is disabled.
  class NoMutex : base::NoCopy {
   public:
    NoMutex(void) {}
    inline void lock(void) {}
    inline bool try_lock(void) {
      return true;
    }
    inline void unlock(void) {}
  };
  /// @brief Lock guard wrapper used when multi-threading is disabled.
  template <typename Mutex>
  class NoScopedLock : base::NoCopy {
   public:
    explicit NoScopedLock(Mutex&) {
    }
    virtual ~NoScopedLock(void) {
    }
   private:
    NoScopedLock(void);
  };
  }  // namespace internal
  typedef base::threading::internal::NoMutex Mutex;
  typedef base::threading::internal::NoScopedLock<base::threading::Mutex> ScopedLock;
  #endif  // ELPP_THREADING_ENABLED
  /// @brief Base of thread safe class, this class is inheritable-only
  class ThreadSafe {
   public:
    virtual inline void acquireLock(void) ELPP_FINAL { m_mutex.lock(); }
    virtual inline void releaseLock(void) ELPP_FINAL { m_mutex.unlock(); }
    virtual inline base::threading::Mutex& lock(void) ELPP_FINAL { return m_mutex; }
   protected:
    ThreadSafe(void) {}
    virtual ~ThreadSafe(void) {}
   private:
    base::threading::Mutex m_mutex;
  };
  
  #if ELPP_THREADING_ENABLED
  #  if !ELPP_USE_STD_THREADING
  /// @brief Gets ID of currently running threading in windows systems. On unix, nothing is returned.
  static std::string getCurrentThreadId(void) {
    std::stringstream ss;
  #      if (ELPP_OS_WINDOWS)
    ss << GetCurrentThreadId();
  #      endif  // (ELPP_OS_WINDOWS)
    return ss.str();
  }
  #  else
  /// @brief Gets ID of currently running threading using std::this_thread::get_id()
  static std::string getCurrentThreadId(void) {
    std::stringstream ss;
    ss << std::this_thread::get_id();
    return ss.str();
  }
  #  endif  // !ELPP_USE_STD_THREADING
  #else
  static inline std::string getCurrentThreadId(void) {
    return std::string();
  }
  #endif  // ELPP_THREADING_ENABLED
  }  // namespace threading
  namespace utils {
  class File : base::StaticClass {
   public:
    /// @brief Creates new out file stream for specified filename.
    /// @return Pointer to newly created fstream or nullptr
    static base::type::fstream_t* newFileStream(const std::string& filename);
  
    /// @brief Gets size of file provided in stream
    static std::size_t getSizeOfFile(base::type::fstream_t* fs);
  
    /// @brief Determines whether or not provided path exist in current file system
    static bool pathExists(const char* path, bool considerFile = false);
  
    /// @brief Creates specified path on file system
    /// @param path Path to create.
    static bool createPath(const std::string& path);
    /// @brief Extracts path of filename with leading slash
    static std::string extractPathFromFilename(const std::string& fullPath,
        const char* seperator = base::consts::kFilePathSeperator);
    /// @brief builds stripped filename and puts it in buff
    static void buildStrippedFilename(const char* filename, char buff[],
                                      std::size_t limit = base::consts::kSourceFilenameMaxLength);
    /// @brief builds base filename and puts it in buff
    static void buildBaseFilename(const std::string& fullPath, char buff[],
                                  std::size_t limit = base::consts::kSourceFilenameMaxLength,
                                  const char* seperator = base::consts::kFilePathSeperator);
  };
  /// @brief String utilities helper class used internally. You should not use it.
  class Str : base::StaticClass {
   public:
    /// @brief Checks if character is digit. Dont use libc implementation of it to prevent locale issues.
    static inline bool isDigit(char c) {
      return c >= '0' && c <= '9';
    }
  
    /// @brief Matches wildcards, '*' and '?' only supported.
    static bool wildCardMatch(const char* str, const char* pattern);
  
    static std::string& ltrim(std::string& str);
    static std::string& rtrim(std::string& str);
    static std::string& trim(std::string& str);
  
    /// @brief Determines whether or not str starts with specified string
    /// @param str String to check
    /// @param start String to check against
    /// @return Returns true if starts with specified string, false otherwise
    static bool startsWith(const std::string& str, const std::string& start);
  
    /// @brief Determines whether or not str ends with specified string
    /// @param str String to check
    /// @param end String to check against
    /// @return Returns true if ends with specified string, false otherwise
    static bool endsWith(const std::string& str, const std::string& end);
  
    /// @brief Replaces all instances of replaceWhat with 'replaceWith'. Original variable is changed for performance.
    /// @param [in,out] str String to replace from
    /// @param replaceWhat Character to replace
    /// @param replaceWith Character to replace with
    /// @return Modified version of str
    static std::string& replaceAll(std::string& str, char replaceWhat, char replaceWith);
  
    /// @brief Replaces all instances of 'replaceWhat' with 'replaceWith'. (String version) Replaces in place
    /// @param str String to replace from
    /// @param replaceWhat Character to replace
    /// @param replaceWith Character to replace with
    /// @return Modified (original) str
    static std::string& replaceAll(std::string& str, const std::string& replaceWhat,
                                   const std::string& replaceWith);
  
    static void replaceFirstWithEscape(base::type::string_t& str, const base::type::string_t& replaceWhat,
                                       const base::type::string_t& replaceWith);
  #if defined(ELPP_UNICODE)
    static void replaceFirstWithEscape(base::type::string_t& str, const base::type::string_t& replaceWhat,
                                       const std::string& replaceWith);
  #endif  // defined(ELPP_UNICODE)
    /// @brief Converts string to uppercase
    /// @param str String to convert
    /// @return Uppercase string
    static std::string& toUpper(std::string& str);
  
    /// @brief Compares cstring equality - uses strcmp
    static bool cStringEq(const char* s1, const char* s2);
  
    /// @brief Compares cstring equality (case-insensitive) - uses toupper(char)
    /// Dont use strcasecmp because of CRT (VC++)
    static bool cStringCaseEq(const char* s1, const char* s2);
  
    /// @brief Returns true if c exist in str
    static bool contains(const char* str, char c);
  
    static char* convertAndAddToBuff(std::size_t n, int len, char* buf, const char* bufLim, bool zeroPadded = true);
    static char* addToBuff(const char* str, char* buf, const char* bufLim);
    static char* clearBuff(char buff[], std::size_t lim);
  
    /// @brief Converst wchar* to char*
    ///        NOTE: Need to free return value after use!
    static char* wcharPtrToCharPtr(const wchar_t* line);
  };
  /// @brief Operating System helper static class used internally. You should not use it.
  class OS : base::StaticClass {
   public:
  #if ELPP_OS_WINDOWS
    /// @brief Gets environment variables for Windows based OS.
    ///        We are not using <code>getenv(const char*)</code> because of CRT deprecation
    /// @param varname Variable name to get environment variable value for
    /// @return If variable exist the value of it otherwise nullptr
    static const char* getWindowsEnvironmentVariable(const char* varname);
  #endif  // ELPP_OS_WINDOWS
  #if ELPP_OS_ANDROID
    /// @brief Reads android property value
    static std::string getProperty(const char* prop);
  
    /// @brief Reads android device name
    static std::string getDeviceName(void);
  #endif  // ELPP_OS_ANDROID
  
    /// @brief Runs command on terminal and returns the output.
    ///
    /// @detail This is applicable only on unix based systems, for all other OS, an empty string is returned.
    /// @param command Bash command
    /// @return Result of bash output or empty string if no result found.
    static const std::string getBashOutput(const char* command);
  
    /// @brief Gets environment variable. This is cross-platform and CRT safe (for VC++)
    /// @param variableName Environment variable name
    /// @param defaultVal If no environment variable or value found the value to return by default
    /// @param alternativeBashCommand If environment variable not found what would be alternative bash command
    ///        in order to look for value user is looking for. E.g, for 'user' alternative command will 'whoami'
    static std::string getEnvironmentVariable(const char* variableName, const char* defaultVal,
        const char* alternativeBashCommand = nullptr);
    /// @brief Gets current username.
    static std::string currentUser(void);
  
    /// @brief Gets current host name or computer name.
    ///
    /// @detail For android systems this is device name with its manufacturer and model seperated by hyphen
    static std::string currentHost(void);
    /// @brief Whether or not terminal supports colors
    static bool termSupportsColor(void);
  };
  /// @brief Contains utilities for cross-platform date/time. This class make use of el::base::utils::Str
  class DateTime : base::StaticClass {
   public:
    /// @brief Cross platform gettimeofday for Windows and unix platform. This can be used to determine current microsecond.
    ///
    /// @detail For unix system it uses gettimeofday(timeval*, timezone*) and for Windows, a seperate implementation is provided
    /// @param [in,out] tv Pointer that gets updated
    static void gettimeofday(struct timeval* tv);
  
    /// @brief Gets current date and time with a subsecond part.
    /// @param format User provided date/time format
    /// @param ssPrec A pointer to base::SubsecondPrecision from configuration (non-null)
    /// @returns string based date time in specified format.
    static std::string getDateTime(const char* format, const base::SubsecondPrecision* ssPrec);
  
    /// @brief Converts timeval (struct from ctime) to string using specified format and subsecond precision
    static std::string timevalToString(struct timeval tval, const char* format,
                                       const el::base::SubsecondPrecision* ssPrec);
  
    /// @brief Formats time to get unit accordingly, units like second if > 1000 or minutes if > 60000 etc
    static base::type::string_t formatTime(unsigned long long time, base::TimestampUnit timestampUnit);
  
    /// @brief Gets time difference in milli/micro second depending on timestampUnit
    static unsigned long long getTimeDifference(const struct timeval& endTime, const struct timeval& startTime,
        base::TimestampUnit timestampUnit);
  
  
    static struct ::tm* buildTimeInfo(struct timeval* currTime, struct ::tm* timeInfo);
   private:
    static char* parseFormat(char* buf, std::size_t bufSz, const char* format, const struct tm* tInfo,
                             std::size_t msec, const base::SubsecondPrecision* ssPrec);
  };
  /// @brief Command line arguments for application if specified using el::Helpers::setArgs(..) or START_EASYLOGGINGPP(..)
  class CommandLineArgs {
   public:
    CommandLineArgs(void) {
      setArgs(0, static_cast<char**>(nullptr));
    }
    CommandLineArgs(int argc, const char** argv) {
      setArgs(argc, argv);
    }
    CommandLineArgs(int argc, char** argv) {
      setArgs(argc, argv);
    }
    virtual ~CommandLineArgs(void) {}
    /// @brief Sets arguments and parses them
    inline void setArgs(int argc, const char** argv) {
      setArgs(argc, const_cast<char**>(argv));
    }
    /// @brief Sets arguments and parses them
    void setArgs(int argc, char** argv);
    /// @brief Returns true if arguments contain paramKey with a value (seperated by '=')
    bool hasParamWithValue(const char* paramKey) const;
    /// @brief Returns value of arguments
    /// @see hasParamWithValue(const char*)
    const char* getParamValue(const char* paramKey) const;
    /// @brief Return true if arguments has a param (not having a value) i,e without '='
    bool hasParam(const char* paramKey) const;
    /// @brief Returns true if no params available. This exclude argv[0]
    bool empty(void) const;
    /// @brief Returns total number of arguments. This exclude argv[0]
    std::size_t size(void) const;
    friend base::type::ostream_t& operator<<(base::type::ostream_t& os, const CommandLineArgs& c);
  
   private:
    int m_argc;
    char** m_argv;
    std::unordered_map<std::string, std::string> m_paramsWithValue;
    std::vector<std::string> m_params;
  };
  /// @brief Abstract registry (aka repository) that provides basic interface for pointer repository specified by T_Ptr type.
  ///
  /// @detail Most of the functions are virtual final methods but anything implementing this abstract class should implement
  /// unregisterAll() and deepCopy(const AbstractRegistry<T_Ptr, Container>&) and write registerNew() method according to container
  /// and few more methods; get() to find element, unregister() to unregister single entry.
  /// Please note that this is thread-unsafe and should also implement thread-safety mechanisms in implementation.
  template <typename T_Ptr, typename Container>
  class AbstractRegistry : public base::threading::ThreadSafe {
   public:
    typedef typename Container::iterator iterator;
    typedef typename Container::const_iterator const_iterator;
  
    /// @brief Default constructor
    AbstractRegistry(void) {}
  
    /// @brief Move constructor that is useful for base classes
    AbstractRegistry(AbstractRegistry&& sr) {
      if (this == &sr) {
        return;
      }
      unregisterAll();
      m_list = std::move(sr.m_list);
    }
  
    bool operator==(const AbstractRegistry<T_Ptr, Container>& other) {
      if (size() != other.size()) {
        return false;
      }
      for (std::size_t i = 0; i < m_list.size(); ++i) {
        if (m_list.at(i) != other.m_list.at(i)) {
          return false;
        }
      }
      return true;
    }
  
    bool operator!=(const AbstractRegistry<T_Ptr, Container>& other) {
      if (size() != other.size()) {
        return true;
      }
      for (std::size_t i = 0; i < m_list.size(); ++i) {
        if (m_list.at(i) != other.m_list.at(i)) {
          return true;
        }
      }
      return false;
    }
  
    /// @brief Assignment move operator
    AbstractRegistry& operator=(AbstractRegistry&& sr) {
      if (this == &sr) {
        return *this;
      }
      unregisterAll();
      m_list = std::move(sr.m_list);
      return *this;
    }
  
    virtual ~AbstractRegistry(void) {
    }
  
    /// @return Iterator pointer from start of repository
    virtual inline iterator begin(void) ELPP_FINAL {
      return m_list.begin();
    }
  
    /// @return Iterator pointer from end of repository
    virtual inline iterator end(void) ELPP_FINAL {
      return m_list.end();
    }
  
  
    /// @return Constant iterator pointer from start of repository
    virtual inline const_iterator cbegin(void) const ELPP_FINAL {
      return m_list.cbegin();
    }
  
    /// @return End of repository
    virtual inline const_iterator cend(void) const ELPP_FINAL {
      return m_list.cend();
    }
  
    /// @return Whether or not repository is empty
    virtual inline bool empty(void) const ELPP_FINAL {
      return m_list.empty();
    }
  
    /// @return Size of repository
    virtual inline std::size_t size(void) const ELPP_FINAL {
      return m_list.size();
    }
  
    /// @brief Returns underlying container by reference
    virtual inline Container& list(void) ELPP_FINAL {
      return m_list;
    }
  
    /// @brief Returns underlying container by constant reference.
    virtual inline const Container& list(void) const ELPP_FINAL {
      return m_list;
    }
  
    /// @brief Unregisters all the pointers from current repository.
    virtual void unregisterAll(void) = 0;
  
   protected:
    virtual void deepCopy(const AbstractRegistry<T_Ptr, Container>&) = 0;
    void reinitDeepCopy(const AbstractRegistry<T_Ptr, Container>& sr) {
      unregisterAll();
      deepCopy(sr);
    }
  
   private:
    Container m_list;
  };
  
  /// @brief A pointer registry mechanism to manage memory and provide search functionalities. (non-predicate version)
  ///
  /// @detail NOTE: This is thread-unsafe implementation (although it contains lock function, it does not use these functions)
  ///         of AbstractRegistry<T_Ptr, Container>. Any implementation of this class should be
  ///         explicitly (by using lock functions)
  template <typename T_Ptr, typename T_Key = const char*>
  class Registry : public AbstractRegistry<T_Ptr, std::unordered_map<T_Key, T_Ptr*>> {
   public:
    typedef typename Registry<T_Ptr, T_Key>::iterator iterator;
    typedef typename Registry<T_Ptr, T_Key>::const_iterator const_iterator;
  
    Registry(void) {}
  
    /// @brief Copy constructor that is useful for base classes. Try to avoid this constructor, use move constructor.
    Registry(const Registry& sr) : AbstractRegistry<T_Ptr, std::vector<T_Ptr*>>() {
      if (this == &sr) {
        return;
      }
      this->reinitDeepCopy(sr);
    }
  
    /// @brief Assignment operator that unregisters all the existing registeries and deeply copies each of repo element
    /// @see unregisterAll()
    /// @see deepCopy(const AbstractRegistry&)
    Registry& operator=(const Registry& sr) {
      if (this == &sr) {
        return *this;
      }
      this->reinitDeepCopy(sr);
      return *this;
    }
  
    virtual ~Registry(void) {
      unregisterAll();
    }
  
   protected:
    virtual void unregisterAll(void) ELPP_FINAL {
      if (!this->empty()) {
        for (auto&& curr : this->list()) {
          base::utils::safeDelete(curr.second);
        }
        this->list().clear();
      }
    }
  
  /// @brief Registers new registry to repository.
    virtual void registerNew(const T_Key& uniqKey, T_Ptr* ptr) ELPP_FINAL {
      unregister(uniqKey);
      this->list().insert(std::make_pair(uniqKey, ptr));
    }
  
  /// @brief Unregisters single entry mapped to specified unique key
    void unregister(const T_Key& uniqKey) {
      T_Ptr* existing = get(uniqKey);
      if (existing != nullptr) {
        this->list().erase(uniqKey);
        base::utils::safeDelete(existing);
      }
    }
  
  /// @brief Gets pointer from repository. If none found, nullptr is returned.
    T_Ptr* get(const T_Key& uniqKey) {
      iterator it = this->list().find(uniqKey);
      return it == this->list().end()
             ? nullptr
             : it->second;
    }
  
   private:
    virtual void deepCopy(const AbstractRegistry<T_Ptr, std::unordered_map<T_Key, T_Ptr*>>& sr) ELPP_FINAL {
      for (const_iterator it = sr.cbegin(); it != sr.cend(); ++it) {
        registerNew(it->first, new T_Ptr(*it->second));
      }
    }
  };
  
  /// @brief A pointer registry mechanism to manage memory and provide search functionalities. (predicate version)
  ///
  /// @detail NOTE: This is thread-unsafe implementation of AbstractRegistry<T_Ptr, Container>. Any implementation of this class
  /// should be made thread-safe explicitly
  template <typename T_Ptr, typename Pred>
  class RegistryWithPred : public AbstractRegistry<T_Ptr, std::vector<T_Ptr*>> {
   public:
    typedef typename RegistryWithPred<T_Ptr, Pred>::iterator iterator;
    typedef typename RegistryWithPred<T_Ptr, Pred>::const_iterator const_iterator;
  
    RegistryWithPred(void) {
    }
  
    virtual ~RegistryWithPred(void) {
      unregisterAll();
    }
  
    /// @brief Copy constructor that is useful for base classes. Try to avoid this constructor, use move constructor.
    RegistryWithPred(const RegistryWithPred& sr) : AbstractRegistry<T_Ptr, std::vector<T_Ptr*>>() {
      if (this == &sr) {
        return;
      }
      this->reinitDeepCopy(sr);
    }
  
    /// @brief Assignment operator that unregisters all the existing registeries and deeply copies each of repo element
    /// @see unregisterAll()
    /// @see deepCopy(const AbstractRegistry&)
    RegistryWithPred& operator=(const RegistryWithPred& sr) {
      if (this == &sr) {
        return *this;
      }
      this->reinitDeepCopy(sr);
      return *this;
    }
  
    friend base::type::ostream_t& operator<<(base::type::ostream_t& os, const RegistryWithPred& sr) {
      for (const_iterator it = sr.list().begin(); it != sr.list().end(); ++it) {
        os << ELPP_LITERAL("    ") << **it << ELPP_LITERAL("\n");
      }
      return os;
    }
  
   protected:
    virtual void unregisterAll(void) ELPP_FINAL {
      if (!this->empty()) {
        for (auto&& curr : this->list()) {
          base::utils::safeDelete(curr);
        }
        this->list().clear();
      }
    }
  
    virtual void unregister(T_Ptr*& ptr) ELPP_FINAL {
      if (ptr) {
        iterator iter = this->begin();
        for (; iter != this->end(); ++iter) {
          if (ptr == *iter) {
            break;
          }
        }
        if (iter != this->end() && *iter != nullptr) {
          this->list().erase(iter);
          base::utils::safeDelete(*iter);
        }
      }
    }
  
    virtual inline void registerNew(T_Ptr* ptr) ELPP_FINAL {
      this->list().push_back(ptr);
    }
  
  /// @brief Gets pointer from repository with speicifed arguments. Arguments are passed to predicate
  /// in order to validate pointer.
    template <typename T, typename T2>
    T_Ptr* get(const T& arg1, const T2 arg2) {
      iterator iter = std::find_if(this->list().begin(), this->list().end(), Pred(arg1, arg2));
      if (iter != this->list().end() && *iter != nullptr) {
        return *iter;
      }
      return nullptr;
    }
  
   private:
    virtual void deepCopy(const AbstractRegistry<T_Ptr, std::vector<T_Ptr*>>& sr) {
      for (const_iterator it = sr.list().begin(); it != sr.list().end(); ++it) {
        registerNew(new T_Ptr(**it));
      }
    }
  };
  class Utils {
   public:
    template <typename T, typename TPtr>
    static bool installCallback(const std::string& id, std::unordered_map<std::string, TPtr>* mapT) {
      if (mapT->find(id) == mapT->end()) {
        mapT->insert(std::make_pair(id, TPtr(new T())));
        return true;
      }
      return false;
    }
  
    template <typename T, typename TPtr>
    static void uninstallCallback(const std::string& id, std::unordered_map<std::string, TPtr>* mapT) {
      if (mapT->find(id) != mapT->end()) {
        mapT->erase(id);
      }
    }
  
    template <typename T, typename TPtr>
    static T* callback(const std::string& id, std::unordered_map<std::string, TPtr>* mapT) {
      typename std::unordered_map<std::string, TPtr>::iterator iter = mapT->find(id);
      if (iter != mapT->end()) {
        return static_cast<T*>(iter->second.get());
      }
      return nullptr;
    }
  };
  }  // namespace utils
  } // namespace base
  /// @brief Base of Easylogging++ friendly class
  ///
  /// @detail After inheriting this class publicly, implement pure-virtual function `void log(std::ostream&) const`
  class Loggable {
   public:
    virtual ~Loggable(void) {}
    virtual void log(el::base::type::ostream_t&) const = 0;
   private:
    friend inline el::base::type::ostream_t& operator<<(el::base::type::ostream_t& os, const Loggable& loggable) {
      loggable.log(os);
      return os;
    }
  };
  namespace base {
  /// @brief Represents log format containing flags and date format. This is used internally to start initial log
  class LogFormat : public Loggable {
   public:
    LogFormat(void);
    LogFormat(Level level, const base::type::string_t& format);
    LogFormat(const LogFormat& logFormat);
    LogFormat(LogFormat&& logFormat);
    LogFormat& operator=(const LogFormat& logFormat);
    virtual ~LogFormat(void) {}
    bool operator==(const LogFormat& other);
  
    /// @brief Updates format to be used while logging.
    /// @param userFormat User provided format
    void parseFromFormat(const base::type::string_t& userFormat);
  
    inline Level level(void) const {
      return m_level;
    }
  
    inline const base::type::string_t& userFormat(void) const {
      return m_userFormat;
    }
  
    inline const base::type::string_t& format(void) const {
      return m_format;
    }
  
    inline const std::string& dateTimeFormat(void) const {
      return m_dateTimeFormat;
    }
  
    inline base::type::EnumType flags(void) const {
      return m_flags;
    }
  
    inline bool hasFlag(base::FormatFlags flag) const {
      return base::utils::hasFlag(flag, m_flags);
    }
  
    virtual void log(el::base::type::ostream_t& os) const {
      os << m_format;
    }
  
   protected:
    /// @brief Updates date time format if available in currFormat.
    /// @param index Index where %datetime, %date or %time was found
    /// @param [in,out] currFormat current format that is being used to format
    virtual void updateDateFormat(std::size_t index, base::type::string_t& currFormat) ELPP_FINAL;
  
    /// @brief Updates %level from format. This is so that we dont have to do it at log-writing-time. It uses m_format and m_level
    virtual void updateFormatSpec(void) ELPP_FINAL;
  
    inline void addFlag(base::FormatFlags flag) {
      base::utils::addFlag(flag, &m_flags);
    }
  
   private:
    Level m_level;
    base::type::string_t m_userFormat;
    base::type::string_t m_format;
    std::string m_dateTimeFormat;
    base::type::EnumType m_flags;
    std::string m_currentUser;
    std::string m_currentHost;
    friend class el::Logger;  // To resolve loggerId format specifier easily
  };
  }  // namespace base
  /// @brief Resolving function for format specifier
  typedef std::function<std::string(const LogMessage*)> FormatSpecifierValueResolver;
  /// @brief User-provided custom format specifier
  /// @see el::Helpers::installCustomFormatSpecifier
  /// @see FormatSpecifierValueResolver
  class CustomFormatSpecifier {
   public:
    CustomFormatSpecifier(const char* formatSpecifier, const FormatSpecifierValueResolver& resolver) :
      m_formatSpecifier(formatSpecifier), m_resolver(resolver) {}
    inline const char* formatSpecifier(void) const {
      return m_formatSpecifier;
    }
    inline const FormatSpecifierValueResolver& resolver(void) const {
      return m_resolver;
    }
    inline bool operator==(const char* formatSpecifier) {
      return strcmp(m_formatSpecifier, formatSpecifier) == 0;
    }
  
   private:
    const char* m_formatSpecifier;
    FormatSpecifierValueResolver m_resolver;
  };
  /// @brief Represents single configuration that has representing level, configuration type and a string based value.
  ///
  /// @detail String based value means any value either its boolean, integer or string itself, it will be embedded inside quotes
  /// and will be parsed later.
  ///
  /// Consider some examples below:
  ///   * el::Configuration confEnabledInfo(el::Level::Info, el::ConfigurationType::Enabled, "true");
  ///   * el::Configuration confMaxLogFileSizeInfo(el::Level::Info, el::ConfigurationType::MaxLogFileSize, "2048");
  ///   * el::Configuration confFilenameInfo(el::Level::Info, el::ConfigurationType::Filename, "/var/log/my.log");
  class Configuration : public Loggable {
   public:
    Configuration(const Configuration& c);
    Configuration& operator=(const Configuration& c);
  
    virtual ~Configuration(void) {
    }
  
    /// @brief Full constructor used to sets value of configuration
    Configuration(Level level, ConfigurationType configurationType, const std::string& value);
  
    /// @brief Gets level of current configuration
    inline Level level(void) const {
      return m_level;
    }
  
    /// @brief Gets configuration type of current configuration
    inline ConfigurationType configurationType(void) const {
      return m_configurationType;
    }
  
    /// @brief Gets string based configuration value
    inline const std::string& value(void) const {
      return m_value;
    }
  
    /// @brief Set string based configuration value
    /// @param value Value to set. Values have to be std::string; For boolean values use "true", "false", for any integral values
    ///        use them in quotes. They will be parsed when configuring
    inline void setValue(const std::string& value) {
      m_value = value;
    }
  
    virtual void log(el::base::type::ostream_t& os) const;
  
    /// @brief Used to find configuration from configuration (pointers) repository. Avoid using it.
    class Predicate {
     public:
      Predicate(Level level, ConfigurationType configurationType);
  
      bool operator()(const Configuration* conf) const;
  
     private:
      Level m_level;
      ConfigurationType m_configurationType;
    };
  
   private:
    Level m_level;
    ConfigurationType m_configurationType;
    std::string m_value;
  };
  
  /// @brief Thread-safe Configuration repository
  ///
  /// @detail This repository represents configurations for all the levels and configuration type mapped to a value.
  class Configurations : public base::utils::RegistryWithPred<Configuration, Configuration::Predicate> {
   public:
    /// @brief Default constructor with empty repository
    Configurations(void);
  
    /// @brief Constructor used to set configurations using configuration file.
    /// @param configurationFile Full path to configuration file
    /// @param useDefaultsForRemaining Lets you set the remaining configurations to default.
    /// @param base If provided, this configuration will be based off existing repository that this argument is pointing to.
    /// @see parseFromFile(const std::string&, Configurations* base)
    /// @see setRemainingToDefault()
    Configurations(const std::string& configurationFile, bool useDefaultsForRemaining = true,
                   Configurations* base = nullptr);
  
    virtual ~Configurations(void) {
    }
  
    /// @brief Parses configuration from file.
    /// @param configurationFile Full path to configuration file
    /// @param base Configurations to base new configuration repository off. This value is used when you want to use
    ///        existing Configurations to base all the values and then set rest of configuration via configuration file.
    /// @return True if successfully parsed, false otherwise. You may define 'ELPP_DEBUG_ASSERT_FAILURE' to make sure you
    ///         do not proceed without successful parse.
    bool parseFromFile(const std::string& configurationFile, Configurations* base = nullptr);
  
    /// @brief Parse configurations from configuration string.
    ///
    /// @detail This configuration string has same syntax as configuration file contents. Make sure all the necessary
    /// new line characters are provided.
    /// @param base Configurations to base new configuration repository off. This value is used when you want to use
    ///        existing Configurations to base all the values and then set rest of configuration via configuration text.
    /// @return True if successfully parsed, false otherwise. You may define 'ELPP_DEBUG_ASSERT_FAILURE' to make sure you
    ///         do not proceed without successful parse.
    bool parseFromText(const std::string& configurationsString, Configurations* base = nullptr);
  
    /// @brief Sets configuration based-off an existing configurations.
    /// @param base Pointer to existing configurations.
    void setFromBase(Configurations* base);
  
    /// @brief Determines whether or not specified configuration type exists in the repository.
    ///
    /// @detail Returns as soon as first level is found.
    /// @param configurationType Type of configuration to check existence for.
    bool hasConfiguration(ConfigurationType configurationType);
  
    /// @brief Determines whether or not specified configuration type exists for specified level
    /// @param level Level to check
    /// @param configurationType Type of configuration to check existence for.
    bool hasConfiguration(Level level, ConfigurationType configurationType);
  
    /// @brief Sets value of configuration for specified level.
    ///
    /// @detail Any existing configuration for specified level will be replaced. Also note that configuration types
    /// ConfigurationType::SubsecondPrecision and ConfigurationType::PerformanceTracking will be ignored if not set for
    /// Level::Global because these configurations are not dependant on level.
    /// @param level Level to set configuration for (el::Level).
    /// @param configurationType Type of configuration (el::ConfigurationType)
    /// @param value A string based value. Regardless of what the data type of configuration is, it will always be string
    /// from users' point of view. This is then parsed later to be used internally.
    /// @see Configuration::setValue(const std::string& value)
    /// @see el::Level
    /// @see el::ConfigurationType
    void set(Level level, ConfigurationType configurationType, const std::string& value);
  
    /// @brief Sets single configuration based on other single configuration.
    /// @see set(Level level, ConfigurationType configurationType, const std::string& value)
    void set(Configuration* conf);
  
    inline Configuration* get(Level level, ConfigurationType configurationType) {
      base::threading::ScopedLock scopedLock(lock());
      return RegistryWithPred<Configuration, Configuration::Predicate>::get(level, configurationType);
    }
  
    /// @brief Sets configuration for all levels.
    /// @param configurationType Type of configuration
    /// @param value String based value
    /// @see Configurations::set(Level level, ConfigurationType configurationType, const std::string& value)
    inline void setGlobally(ConfigurationType configurationType, const std::string& value) {
      setGlobally(configurationType, value, false);
    }
  
    /// @brief Clears repository so that all the configurations are unset
    inline void clear(void) {
      base::threading::ScopedLock scopedLock(lock());
      unregisterAll();
    }
  
    /// @brief Gets configuration file used in parsing this configurations.
    ///
    /// @detail If this repository was set manually or by text this returns empty string.
    inline const std::string& configurationFile(void) const {
      return m_configurationFile;
    }
  
    /// @brief Sets configurations to "factory based" configurations.
    void setToDefault(void);
  
    /// @brief Lets you set the remaining configurations to default.
    ///
    /// @detail By remaining, it means that the level/type a configuration does not exist for.
    /// This function is useful when you want to minimize chances of failures, e.g, if you have a configuration file that sets
    /// configuration for all the configurations except for Enabled or not, we use this so that ENABLED is set to default i.e,
    /// true. If you dont do this explicitly (either by calling this function or by using second param in Constructor
    /// and try to access a value, an error is thrown
    void setRemainingToDefault(void);
  
    /// @brief Parser used internally to parse configurations from file or text.
    ///
    /// @detail This class makes use of base::utils::Str.
    /// You should not need this unless you are working on some tool for Easylogging++
    class Parser : base::StaticClass {
     public:
      /// @brief Parses configuration from file.
      /// @param configurationFile Full path to configuration file
      /// @param sender Sender configurations pointer. Usually 'this' is used from calling class
      /// @param base Configurations to base new configuration repository off. This value is used when you want to use
      ///        existing Configurations to base all the values and then set rest of configuration via configuration file.
      /// @return True if successfully parsed, false otherwise. You may define '_STOP_ON_FIRSTELPP_ASSERTION' to make sure you
      ///         do not proceed without successful parse.
      static bool parseFromFile(const std::string& configurationFile, Configurations* sender,
                                Configurations* base = nullptr);
  
      /// @brief Parse configurations from configuration string.
      ///
      /// @detail This configuration string has same syntax as configuration file contents. Make sure all the necessary
      /// new line characters are provided. You may define '_STOP_ON_FIRSTELPP_ASSERTION' to make sure you
      /// do not proceed without successful parse (This is recommended)
      /// @param configurationsString the configuration in plain text format
      /// @param sender Sender configurations pointer. Usually 'this' is used from calling class
      /// @param base Configurations to base new configuration repository off. This value is used when you want to use
      ///        existing Configurations to base all the values and then set rest of configuration via configuration text.
      /// @return True if successfully parsed, false otherwise.
      static bool parseFromText(const std::string& configurationsString, Configurations* sender,
                                Configurations* base = nullptr);
  
     private:
      friend class el::Loggers;
      static void ignoreComments(std::string* line);
      static bool isLevel(const std::string& line);
      static bool isComment(const std::string& line);
      static inline bool isConfig(const std::string& line);
      static bool parseLine(std::string* line, std::string* currConfigStr, std::string* currLevelStr, Level* currLevel,
                            Configurations* conf);
    };
  
   private:
    std::string m_configurationFile;
    bool m_isFromFile;
    friend class el::Loggers;
  
    /// @brief Unsafely sets configuration if does not already exist
    void unsafeSetIfNotExist(Level level, ConfigurationType configurationType, const std::string& value);
  
    /// @brief Thread unsafe set
    void unsafeSet(Level level, ConfigurationType configurationType, const std::string& value);
  
    /// @brief Sets configurations for all levels including Level::Global if includeGlobalLevel is true
    /// @see Configurations::setGlobally(ConfigurationType configurationType, const std::string& value)
    void setGlobally(ConfigurationType configurationType, const std::string& value, bool includeGlobalLevel);
  
    /// @brief Sets configurations (Unsafely) for all levels including Level::Global if includeGlobalLevel is true
    /// @see Configurations::setGlobally(ConfigurationType configurationType, const std::string& value)
    void unsafeSetGlobally(ConfigurationType configurationType, const std::string& value, bool includeGlobalLevel);
  };
  
  namespace base {
  typedef std::shared_ptr<base::type::fstream_t> FileStreamPtr;
  typedef std::unordered_map<std::string, FileStreamPtr> LogStreamsReferenceMap;
  typedef std::shared_ptr<base::LogStreamsReferenceMap> LogStreamsReferenceMapPtr;
  /// @brief Configurations with data types.
  ///
  /// @detail el::Configurations have string based values. This is whats used internally in order to read correct configurations.
  /// This is to perform faster while writing logs using correct configurations.
  ///
  /// This is thread safe and final class containing non-virtual destructor (means nothing should inherit this class)
  class TypedConfigurations : public base::threading::ThreadSafe {
   public:
    /// @brief Constructor to initialize (construct) the object off el::Configurations
    /// @param configurations Configurations pointer/reference to base this typed configurations off.
    /// @param logStreamsReference Use ELPP->registeredLoggers()->logStreamsReference()
    TypedConfigurations(Configurations* configurations, LogStreamsReferenceMapPtr logStreamsReference);
  
    TypedConfigurations(const TypedConfigurations& other);
  
    virtual ~TypedConfigurations(void) {
          // Clear all streams in map. They will be inserted back on reconfiguration.
          m_logStreamsReference->clear();
    }
  
    const Configurations* configurations(void) const {
      return m_configurations;
    }
  
    bool enabled(Level level);
    bool toFile(Level level);
    const std::string& filename(Level level);
    bool toStandardOutput(Level level);
    bool toSyslog(Level level);
    const base::LogFormat& logFormat(Level level);
    const base::SubsecondPrecision& subsecondPrecision(Level level = Level::Global);
    const base::MillisecondsWidth& millisecondsWidth(Level level = Level::Global);
    bool performanceTracking(Level level = Level::Global);
    base::type::fstream_t* fileStream(Level level);
    base::FileStreamPtr sharedFileStream(Level level);
    std::size_t maxLogFileSize(Level level);
    std::size_t logFlushThreshold(Level level);
  
   private:
    Configurations* m_configurations;
    std::unordered_map<Level, bool> m_enabledMap;
    std::unordered_map<Level, bool> m_toFileMap;
    std::unordered_map<Level, std::string> m_filenameMap;
    std::unordered_map<Level, bool> m_toStandardOutputMap;
    std::unordered_map<Level, bool> m_toSyslog;
    std::unordered_map<Level, base::LogFormat> m_logFormatMap;
    std::unordered_map<Level, base::SubsecondPrecision> m_subsecondPrecisionMap;
    std::unordered_map<Level, bool> m_performanceTrackingMap;
    std::unordered_map<Level, base::FileStreamPtr> m_fileStreamMap;
    std::unordered_map<Level, std::size_t> m_maxLogFileSizeMap;
    std::unordered_map<Level, std::size_t> m_logFlushThresholdMap;
    LogStreamsReferenceMapPtr m_logStreamsReference = nullptr;
  
    friend class el::Helpers;
    friend class el::base::MessageBuilder;
    friend class el::base::Writer;
    friend class el::base::DefaultLogDispatchCallback;
    friend class el::base::LogDispatcher;
  
    template <typename Conf_T>
    inline Conf_T getConfigByVal(Level level, const std::unordered_map<Level, Conf_T>* confMap, const char* confName) {
      base::threading::ScopedLock scopedLock(lock());
      return unsafeGetConfigByVal(level, confMap, confName);  // This is not unsafe anymore - mutex locked in scope
    }
  
    template <typename Conf_T>
    inline Conf_T& getConfigByRef(Level level, std::unordered_map<Level, Conf_T>* confMap, const char* confName) {
      base::threading::ScopedLock scopedLock(lock());
      return unsafeGetConfigByRef(level, confMap, confName);  // This is not unsafe anymore - mutex locked in scope
    }
  
    template <typename Conf_T>
    Conf_T unsafeGetConfigByVal(Level level, const std::unordered_map<Level, Conf_T>* confMap, const char* confName) {
      ELPP_UNUSED(confName);
      typename std::unordered_map<Level, Conf_T>::const_iterator it = confMap->find(level);
      if (it == confMap->end()) {
        try {
          return confMap->at(Level::Global);
        } catch (...) {
          ELPP_INTERNAL_ERROR("Unable to get configuration [" << confName << "] for level ["
                              << LevelHelper::convertToString(level) << "]"
                              << std::endl << "Please ensure you have properly configured logger.", false);
          return Conf_T();
        }
      }
      return it->second;
    }
  
    template <typename Conf_T>
    Conf_T& unsafeGetConfigByRef(Level level, std::unordered_map<Level, Conf_T>* confMap, const char* confName) {
      ELPP_UNUSED(confName);
      typename std::unordered_map<Level, Conf_T>::iterator it = confMap->find(level);
      if (it == confMap->end()) {
        try {
          return confMap->at(Level::Global);
        } catch (...) {
          ELPP_INTERNAL_ERROR("Unable to get configuration [" << confName << "] for level ["
                              << LevelHelper::convertToString(level) << "]"
                              << std::endl << "Please ensure you have properly configured logger.", false);
        }
      }
      return it->second;
    }
  
    template <typename Conf_T>
    void setValue(Level level, const Conf_T& value, std::unordered_map<Level, Conf_T>* confMap,
                  bool includeGlobalLevel = true) {
      // If map is empty and we are allowed to add into generic level (Level::Global), do it!
      if (confMap->empty() && includeGlobalLevel) {
        confMap->insert(std::make_pair(Level::Global, value));
        return;
      }
      // If same value exist in generic level already, dont add it to explicit level
      typename std::unordered_map<Level, Conf_T>::iterator it = confMap->find(Level::Global);
      if (it != confMap->end() && it->second == value) {
        return;
      }
      // Now make sure we dont double up values if we really need to add it to explicit level
      it = confMap->find(level);
      if (it == confMap->end()) {
        // Value not found for level, add new
        confMap->insert(std::make_pair(level, value));
      } else {
        // Value found, just update value
        confMap->at(level) = value;
      }
    }
  
    void build(Configurations* configurations);
    unsigned long getULong(std::string confVal);
    std::string resolveFilename(const std::string& filename);
    void insertFile(Level level, const std::string& fullFilename);
    bool unsafeValidateFileRolling(Level level, const PreRollOutCallback& preRollOutCallback);
  
    inline bool validateFileRolling(Level level, const PreRollOutCallback& preRollOutCallback) {
      base::threading::ScopedLock scopedLock(lock());
      return unsafeValidateFileRolling(level, preRollOutCallback);
    }
  };
  /// @brief Class that keeps record of current line hit for occasional logging
  class HitCounter {
   public:
    HitCounter(void) :
      m_filename(""),
      m_lineNumber(0),
      m_hitCounts(0) {
    }
  
    HitCounter(const char* filename, base::type::LineNumber lineNumber) :
      m_filename(filename),
      m_lineNumber(lineNumber),
      m_hitCounts(0) {
    }
  
    HitCounter(const HitCounter& hitCounter) :
      m_filename(hitCounter.m_filename),
      m_lineNumber(hitCounter.m_lineNumber),
      m_hitCounts(hitCounter.m_hitCounts) {
    }
  
    HitCounter& operator=(const HitCounter& hitCounter) {
      if (&hitCounter != this) {
        m_filename = hitCounter.m_filename;
        m_lineNumber = hitCounter.m_lineNumber;
        m_hitCounts = hitCounter.m_hitCounts;
      }
      return *this;
    }
  
    virtual ~HitCounter(void) {
    }
  
    /// @brief Resets location of current hit counter
    inline void resetLocation(const char* filename, base::type::LineNumber lineNumber) {
      m_filename = filename;
      m_lineNumber = lineNumber;
    }
  
    /// @brief Validates hit counts and resets it if necessary
    inline void validateHitCounts(std::size_t n) {
      if (m_hitCounts >= base::consts::kMaxLogPerCounter) {
        m_hitCounts = (n >= 1 ? base::consts::kMaxLogPerCounter % n : 0);
      }
      ++m_hitCounts;
    }
  
    inline const char* filename(void) const {
      return m_filename;
    }
  
    inline base::type::LineNumber lineNumber(void) const {
      return m_lineNumber;
    }
  
    inline std::size_t hitCounts(void) const {
      return m_hitCounts;
    }
  
    inline void increment(void) {
      ++m_hitCounts;
    }
  
    class Predicate {
     public:
      Predicate(const char* filename, base::type::LineNumber lineNumber)
        : m_filename(filename),
          m_lineNumber(lineNumber) {
      }
      inline bool operator()(const HitCounter* counter) {
        return ((counter != nullptr) &&
                (strcmp(counter->m_filename, m_filename) == 0) &&
                (counter->m_lineNumber == m_lineNumber));
      }
  
     private:
      const char* m_filename;
      base::type::LineNumber m_lineNumber;
    };
  
   private:
    const char* m_filename;
    base::type::LineNumber m_lineNumber;
    std::size_t m_hitCounts;
  };
  /// @brief Repository for hit counters used across the application
  class RegisteredHitCounters : public base::utils::RegistryWithPred<base::HitCounter, base::HitCounter::Predicate> {
   public:
    /// @brief Validates counter for every N, i.e, registers new if does not exist otherwise updates original one
    /// @return True if validation resulted in triggering hit. Meaning logs should be written everytime true is returned
    bool validateEveryN(const char* filename, base::type::LineNumber lineNumber, std::size_t n);
  
    /// @brief Validates counter for hits >= N, i.e, registers new if does not exist otherwise updates original one
    /// @return True if validation resulted in triggering hit. Meaning logs should be written everytime true is returned
    bool validateAfterN(const char* filename, base::type::LineNumber lineNumber, std::size_t n);
  
    /// @brief Validates counter for hits are <= n, i.e, registers new if does not exist otherwise updates original one
    /// @return True if validation resulted in triggering hit. Meaning logs should be written everytime true is returned
    bool validateNTimes(const char* filename, base::type::LineNumber lineNumber, std::size_t n);
  
    /// @brief Gets hit counter registered at specified position
    inline const base::HitCounter* getCounter(const char* filename, base::type::LineNumber lineNumber) {
      base::threading::ScopedLock scopedLock(lock());
      return get(filename, lineNumber);
    }
  };
  /// @brief Action to be taken for dispatching
  enum class DispatchAction : base::type::EnumType {
    None = 1, NormalLog = 2, SysLog = 4
  };
  }  // namespace base
  template <typename T>
  class Callback : protected base::threading::ThreadSafe {
   public:
    Callback(void) : m_enabled(true) {}
    inline bool enabled(void) const {
      return m_enabled;
    }
    inline void setEnabled(bool enabled) {
      base::threading::ScopedLock scopedLock(lock());
      m_enabled = enabled;
    }
   protected:
    virtual void handle(const T* handlePtr) = 0;
   private:
    bool m_enabled;
  };
  class LogDispatchData {
   public:
    LogDispatchData() : m_logMessage(nullptr), m_dispatchAction(base::DispatchAction::None) {}
    inline const LogMessage* logMessage(void) const {
      return m_logMessage;
    }
    inline base::DispatchAction dispatchAction(void) const {
      return m_dispatchAction;
    }
    inline void setLogMessage(LogMessage* logMessage) {
      m_logMessage = logMessage;
    }
    inline void setDispatchAction(base::DispatchAction dispatchAction) {
      m_dispatchAction = dispatchAction;
    }
   private:
    LogMessage* m_logMessage;
    base::DispatchAction m_dispatchAction;
    friend class base::LogDispatcher;
  
  };
  class LogDispatchCallback : public Callback<LogDispatchData> {
   protected:
    virtual void handle(const LogDispatchData* data);
    base::threading::Mutex& fileHandle(const LogDispatchData* data);
   private:
    friend class base::LogDispatcher;
    std::unordered_map<std::string, std::unique_ptr<base::threading::Mutex>> m_fileLocks;
    base::threading::Mutex m_fileLocksMapLock;
  };
  class PerformanceTrackingCallback : public Callback<PerformanceTrackingData> {
   private:
    friend class base::PerformanceTracker;
  };
  class LoggerRegistrationCallback : public Callback<Logger> {
   private:
    friend class base::RegisteredLoggers;
  };
  class LogBuilder : base::NoCopy {
   public:
    LogBuilder() : m_termSupportsColor(base::utils::OS::termSupportsColor()) {}
    virtual ~LogBuilder(void) {
      ELPP_INTERNAL_INFO(3, "Destroying log builder...")
    }
    virtual base::type::string_t build(const LogMessage* logMessage, bool appendNewLine) const = 0;
    void convertToColoredOutput(base::type::string_t* logLine, Level level);
   private:
    bool m_termSupportsColor;
    friend class el::base::DefaultLogDispatchCallback;
  };
  typedef std::shared_ptr<LogBuilder> LogBuilderPtr;
  /// @brief Represents a logger holding ID and configurations we need to write logs
  ///
  /// @detail This class does not write logs itself instead its used by writer to read configuations from.
  class Logger : public base::threading::ThreadSafe, public Loggable {
   public:
    Logger(const std::string& id, base::LogStreamsReferenceMapPtr logStreamsReference);
    Logger(const std::string& id, const Configurations& configurations, base::LogStreamsReferenceMapPtr logStreamsReference);
    Logger(const Logger& logger);
    Logger& operator=(const Logger& logger);
  
    virtual ~Logger(void) {
      base::utils::safeDelete(m_typedConfigurations);
    }
  
    virtual inline void log(el::base::type::ostream_t& os) const {
      os << m_id.c_str();
    }
  
    /// @brief Configures the logger using specified configurations.
    void configure(const Configurations& configurations);
  
    /// @brief Reconfigures logger using existing configurations
    void reconfigure(void);
  
    inline const std::string& id(void) const {
      return m_id;
    }
  
    inline const std::string& parentApplicationName(void) const {
      return m_parentApplicationName;
    }
  
    inline void setParentApplicationName(const std::string& parentApplicationName) {
      m_parentApplicationName = parentApplicationName;
    }
  
    inline Configurations* configurations(void) {
      return &m_configurations;
    }
  
    inline base::TypedConfigurations* typedConfigurations(void) {
      return m_typedConfigurations;
    }
  
    static bool isValidId(const std::string& id);
  
    /// @brief Flushes logger to sync all log files for all levels
    void flush(void);
  
    void flush(Level level, el::base::FileStreamPtr fs);
  
    inline bool isFlushNeeded(Level level) {
      return ++m_unflushedCount.find(level)->second >= m_typedConfigurations->logFlushThreshold(level);
    }
  
    inline LogBuilder* logBuilder(void) const {
      return m_logBuilder.get();
    }
  
    inline void setLogBuilder(const LogBuilderPtr& logBuilder) {
      m_logBuilder = logBuilder;
    }
  
    inline bool enabled(Level level) const {
      return m_typedConfigurations->enabled(level);
    }
  
  #if ELPP_VARIADIC_TEMPLATES_SUPPORTED
  #  define LOGGER_LEVEL_WRITERS_SIGNATURES(FUNCTION_NAME)\
  template <typename T, typename... Args>\
  inline void FUNCTION_NAME(const char*, const T&, const Args&...);\
  template <typename T>\
  inline void FUNCTION_NAME(const T&);
  
    template <typename T, typename... Args>
    inline void verbose(int, const char*, const T&, const Args&...);
  
    template <typename T>
    inline void verbose(int, const T&);
  
    LOGGER_LEVEL_WRITERS_SIGNATURES(info)
    LOGGER_LEVEL_WRITERS_SIGNATURES(debug)
    LOGGER_LEVEL_WRITERS_SIGNATURES(warn)
    LOGGER_LEVEL_WRITERS_SIGNATURES(error)
    LOGGER_LEVEL_WRITERS_SIGNATURES(fatal)
    LOGGER_LEVEL_WRITERS_SIGNATURES(trace)
  #  undef LOGGER_LEVEL_WRITERS_SIGNATURES
  #endif // ELPP_VARIADIC_TEMPLATES_SUPPORTED
   private:
    std::string m_id;
    base::TypedConfigurations* m_typedConfigurations;
    base::type::stringstream_t m_stream;
    std::string m_parentApplicationName;
    bool m_isConfigured;
    Configurations m_configurations;
    std::unordered_map<Level, unsigned int> m_unflushedCount;
    base::LogStreamsReferenceMapPtr m_logStreamsReference = nullptr;
    LogBuilderPtr m_logBuilder;
  
    friend class el::LogMessage;
    friend class el::Loggers;
    friend class el::Helpers;
    friend class el::base::RegisteredLoggers;
    friend class el::base::DefaultLogDispatchCallback;
    friend class el::base::MessageBuilder;
    friend class el::base::Writer;
    friend class el::base::PErrorWriter;
    friend class el::base::Storage;
    friend class el::base::PerformanceTracker;
    friend class el::base::LogDispatcher;
  
    Logger(void);
  
  #if ELPP_VARIADIC_TEMPLATES_SUPPORTED
    template <typename T, typename... Args>
    void log_(Level, int, const char*, const T&, const Args&...);
  
    template <typename T>
    inline void log_(Level, int, const T&);
  
    template <typename T, typename... Args>
    void log(Level, const char*, const T&, const Args&...);
  
    template <typename T>
    inline void log(Level, const T&);
  #endif // ELPP_VARIADIC_TEMPLATES_SUPPORTED
  
    void initUnflushedCount(void);
  
    inline base::type::stringstream_t& stream(void) {
      return m_stream;
    }
  
    void resolveLoggerFormatSpec(void) const;
  };
  namespace base {
  /// @brief Loggers repository
  class RegisteredLoggers : public base::utils::Registry<Logger, std::string> {
   public:
    explicit RegisteredLoggers(const LogBuilderPtr& defaultLogBuilder);
  
    virtual ~RegisteredLoggers(void) {
      unsafeFlushAll();
    }
  
    inline void setDefaultConfigurations(const Configurations& configurations) {
      base::threading::ScopedLock scopedLock(lock());
      m_defaultConfigurations.setFromBase(const_cast<Configurations*>(&configurations));
    }
  
    inline Configurations* defaultConfigurations(void) {
      return &m_defaultConfigurations;
    }
  
    Logger* get(const std::string& id, bool forceCreation = true);
  
    template <typename T>
    inline bool installLoggerRegistrationCallback(const std::string& id) {
      return base::utils::Utils::installCallback<T, base::type::LoggerRegistrationCallbackPtr>(id,
             &m_loggerRegistrationCallbacks);
    }
  
    template <typename T>
    inline void uninstallLoggerRegistrationCallback(const std::string& id) {
      base::utils::Utils::uninstallCallback<T, base::type::LoggerRegistrationCallbackPtr>(id, &m_loggerRegistrationCallbacks);
    }
  
    template <typename T>
    inline T* loggerRegistrationCallback(const std::string& id) {
      return base::utils::Utils::callback<T, base::type::LoggerRegistrationCallbackPtr>(id, &m_loggerRegistrationCallbacks);
    }
  
    bool remove(const std::string& id);
  
    inline bool has(const std::string& id) {
      return get(id, false) != nullptr;
    }
  
    inline void unregister(Logger*& logger) {
      base::threading::ScopedLock scopedLock(lock());
      base::utils::Registry<Logger, std::string>::unregister(logger->id());
    }
  
    inline LogStreamsReferenceMapPtr logStreamsReference(void) {
      return m_logStreamsReference;
    }
  
    inline void flushAll(void) {
      base::threading::ScopedLock scopedLock(lock());
      unsafeFlushAll();
    }
  
    inline void setDefaultLogBuilder(LogBuilderPtr& logBuilderPtr) {
      base::threading::ScopedLock scopedLock(lock());
      m_defaultLogBuilder = logBuilderPtr;
    }
  
   private:
    LogBuilderPtr m_defaultLogBuilder;
    Configurations m_defaultConfigurations;
    base::LogStreamsReferenceMapPtr m_logStreamsReference = nullptr;
    std::unordered_map<std::string, base::type::LoggerRegistrationCallbackPtr> m_loggerRegistrationCallbacks;
    friend class el::base::Storage;
  
    void unsafeFlushAll(void);
  };
  /// @brief Represents registries for verbose logging
  class VRegistry : base::NoCopy, public base::threading::ThreadSafe {
   public:
    explicit VRegistry(base::type::VerboseLevel level, base::type::EnumType* pFlags);
  
    /// @brief Sets verbose level. Accepted range is 0-9
    void setLevel(base::type::VerboseLevel level);
  
    inline base::type::VerboseLevel level(void) const {
      return m_level;
    }
  
    inline void clearModules(void) {
      base::threading::ScopedLock scopedLock(lock());
      m_modules.clear();
    }
  
    void setModules(const char* modules);
  
    bool allowed(base::type::VerboseLevel vlevel, const char* file);
  
    inline const std::unordered_map<std::string, base::type::VerboseLevel>& modules(void) const {
      return m_modules;
    }
  
    void setFromArgs(const base::utils::CommandLineArgs* commandLineArgs);
  
    /// @brief Whether or not vModules enabled
    inline bool vModulesEnabled(void) {
      return !base::utils::hasFlag(LoggingFlag::DisableVModules, *m_pFlags);
    }
  
   private:
    base::type::VerboseLevel m_level;
    base::type::EnumType* m_pFlags;
    std::unordered_map<std::string, base::type::VerboseLevel> m_modules;
  };
  }  // namespace base
  class LogMessage {
   public:
    LogMessage(Level level, const std::string& file, base::type::LineNumber line, const std::string& func,
               base::type::VerboseLevel verboseLevel, Logger* logger) :
      m_level(level), m_file(file), m_line(line), m_func(func),
      m_verboseLevel(verboseLevel), m_logger(logger), m_message(logger->stream().str()) {
    }
    LogMessage(Level level, const std::string& file, base::type::LineNumber line, const std::string& func,
               base::type::VerboseLevel verboseLevel, Logger* logger, const base::type::string_t& message) :
      m_level(level), m_file(file), m_line(line), m_func(func),
      m_verboseLevel(verboseLevel), m_logger(logger), m_message(message) {
    }
    inline Level level(void) const {
      return m_level;
    }
    inline const std::string& file(void) const {
      return m_file;
    }
    inline base::type::LineNumber line(void) const {
      return m_line;
    }
    inline const std::string& func(void) const {
      return m_func;
    }
    inline base::type::VerboseLevel verboseLevel(void) const {
      return m_verboseLevel;
    }
    inline Logger* logger(void) const {
      return m_logger;
    }
    inline const base::type::string_t& message(void) const {
      return m_message;
    }
   private:
    Level m_level;
    std::string m_file;
    base::type::LineNumber m_line;
    std::string m_func;
    base::type::VerboseLevel m_verboseLevel;
    Logger* m_logger;
    base::type::string_t m_message;
  };
  namespace base {
  #if ELPP_ASYNC_LOGGING
  class AsyncLogItem {
   public:
    explicit AsyncLogItem(const LogMessage& logMessage, const LogDispatchData& data, const base::type::string_t& logLine)
      : m_logMessage(logMessage), m_dispatchData(data), m_logLine(logLine) {}
    virtual ~AsyncLogItem() {}
    inline LogMessage* logMessage(void) {
      return &m_logMessage;
    }
    inline LogDispatchData* data(void) {
      return &m_dispatchData;
    }
    inline base::type::string_t logLine(void) {
      return m_logLine;
    }
   private:
    LogMessage m_logMessage;
    LogDispatchData m_dispatchData;
    base::type::string_t m_logLine;
  };
  class AsyncLogQueue : public base::threading::ThreadSafe {
   public:
    virtual ~AsyncLogQueue() {
      ELPP_INTERNAL_INFO(6, "~AsyncLogQueue");
    }
  
    inline AsyncLogItem next(void) {
      base::threading::ScopedLock scopedLock(lock());
      AsyncLogItem result = m_queue.front();
      m_queue.pop();
      return result;
    }
  
    inline void push(const AsyncLogItem& item) {
      base::threading::ScopedLock scopedLock(lock());
      m_queue.push(item);
    }
    inline void pop(void) {
      base::threading::ScopedLock scopedLock(lock());
      m_queue.pop();
    }
    inline AsyncLogItem front(void) {
      base::threading::ScopedLock scopedLock(lock());
      return m_queue.front();
    }
    inline bool empty(void) {
      base::threading::ScopedLock scopedLock(lock());
      return m_queue.empty();
    }
   private:
    std::queue<AsyncLogItem> m_queue;
  };
  class IWorker {
   public:
    virtual ~IWorker() {}
    virtual void start() = 0;
  };
  #endif // ELPP_ASYNC_LOGGING
  /// @brief Easylogging++ management storage
  class Storage : base::NoCopy, public base::threading::ThreadSafe {
   public:
  #if ELPP_ASYNC_LOGGING
    Storage(const LogBuilderPtr& defaultLogBuilder, base::IWorker* asyncDispatchWorker);
  #else
    explicit Storage(const LogBuilderPtr& defaultLogBuilder);
  #endif  // ELPP_ASYNC_LOGGING
  
    virtual ~Storage(void);
  
    inline bool validateEveryNCounter(const char* filename, base::type::LineNumber lineNumber, std::size_t occasion) {
      return hitCounters()->validateEveryN(filename, lineNumber, occasion);
    }
  
    inline bool validateAfterNCounter(const char* filename, base::type::LineNumber lineNumber, std::size_t n) {
      return hitCounters()->validateAfterN(filename, lineNumber, n);
    }
  
    inline bool validateNTimesCounter(const char* filename, base::type::LineNumber lineNumber, std::size_t n) {
      return hitCounters()->validateNTimes(filename, lineNumber, n);
    }
  
    inline base::RegisteredHitCounters* hitCounters(void) const {
      return m_registeredHitCounters;
    }
  
    inline base::RegisteredLoggers* registeredLoggers(void) const {
      return m_registeredLoggers;
    }
  
    inline base::VRegistry* vRegistry(void) const {
      return m_vRegistry;
    }
  
  #if ELPP_ASYNC_LOGGING
    inline base::AsyncLogQueue* asyncLogQueue(void) const {
      return m_asyncLogQueue;
    }
  #endif  // ELPP_ASYNC_LOGGING
  
    inline const base::utils::CommandLineArgs* commandLineArgs(void) const {
      return &m_commandLineArgs;
    }
  
    inline void addFlag(LoggingFlag flag) {
      base::utils::addFlag(flag, &m_flags);
    }
  
    inline void removeFlag(LoggingFlag flag) {
      base::utils::removeFlag(flag, &m_flags);
    }
  
    inline bool hasFlag(LoggingFlag flag) const {
      return base::utils::hasFlag(flag, m_flags);
    }
  
    inline base::type::EnumType flags(void) const {
      return m_flags;
    }
  
    inline void setFlags(base::type::EnumType flags) {
      m_flags = flags;
    }
  
    inline void setPreRollOutCallback(const PreRollOutCallback& callback) {
      m_preRollOutCallback = callback;
    }
  
    inline void unsetPreRollOutCallback(void) {
      m_preRollOutCallback = base::defaultPreRollOutCallback;
    }
  
    inline PreRollOutCallback& preRollOutCallback(void) {
      return m_preRollOutCallback;
    }
  
    bool hasCustomFormatSpecifier(const char* formatSpecifier);
    void installCustomFormatSpecifier(const CustomFormatSpecifier& customFormatSpecifier);
    bool uninstallCustomFormatSpecifier(const char* formatSpecifier);
  
    const std::vector<CustomFormatSpecifier>* customFormatSpecifiers(void) const {
      return &m_customFormatSpecifiers;
    }
  
    base::threading::Mutex& customFormatSpecifiersLock() {
      return m_customFormatSpecifiersLock;
    }
  
    inline void setLoggingLevel(Level level) {
      m_loggingLevel = level;
    }
  
    template <typename T>
    inline bool installLogDispatchCallback(const std::string& id) {
      return base::utils::Utils::installCallback<T, base::type::LogDispatchCallbackPtr>(id, &m_logDispatchCallbacks);
    }
  
    template <typename T>
    inline void uninstallLogDispatchCallback(const std::string& id) {
      base::utils::Utils::uninstallCallback<T, base::type::LogDispatchCallbackPtr>(id, &m_logDispatchCallbacks);
    }
    template <typename T>
    inline T* logDispatchCallback(const std::string& id) {
      return base::utils::Utils::callback<T, base::type::LogDispatchCallbackPtr>(id, &m_logDispatchCallbacks);
    }
  
  #if defined(ELPP_FEATURE_ALL) || defined(ELPP_FEATURE_PERFORMANCE_TRACKING)
    template <typename T>
    inline bool installPerformanceTrackingCallback(const std::string& id) {
      return base::utils::Utils::installCallback<T, base::type::PerformanceTrackingCallbackPtr>(id,
             &m_performanceTrackingCallbacks);
    }
  
    template <typename T>
    inline void uninstallPerformanceTrackingCallback(const std::string& id) {
      base::utils::Utils::uninstallCallback<T, base::type::PerformanceTrackingCallbackPtr>(id,
          &m_performanceTrackingCallbacks);
    }
  
    template <typename T>
    inline T* performanceTrackingCallback(const std::string& id) {
      return base::utils::Utils::callback<T, base::type::PerformanceTrackingCallbackPtr>(id, &m_performanceTrackingCallbacks);
    }
  #endif // defined(ELPP_FEATURE_ALL) || defined(ELPP_FEATURE_PERFORMANCE_TRACKING)
  
    /// @brief Sets thread name for current thread. Requires std::thread
    inline void setThreadName(const std::string& name) {
      if (name.empty()) return;
      base::threading::ScopedLock scopedLock(m_threadNamesLock);
      m_threadNames[base::threading::getCurrentThreadId()] = name;
    }
  
    inline std::string getThreadName(const std::string& threadId) {
      base::threading::ScopedLock scopedLock(m_threadNamesLock);
      std::unordered_map<std::string, std::string>::const_iterator it = m_threadNames.find(threadId);
      if (it == m_threadNames.end()) {
        return threadId;
      }
      return it->second;
    }
   private:
    base::RegisteredHitCounters* m_registeredHitCounters;
    base::RegisteredLoggers* m_registeredLoggers;
    base::type::EnumType m_flags;
    base::VRegistry* m_vRegistry;
  #if ELPP_ASYNC_LOGGING
    base::AsyncLogQueue* m_asyncLogQueue;
    base::IWorker* m_asyncDispatchWorker;
  #endif  // ELPP_ASYNC_LOGGING
    base::utils::CommandLineArgs m_commandLineArgs;
    PreRollOutCallback m_preRollOutCallback;
    std::unordered_map<std::string, base::type::LogDispatchCallbackPtr> m_logDispatchCallbacks;
    std::unordered_map<std::string, base::type::PerformanceTrackingCallbackPtr> m_performanceTrackingCallbacks;
    std::unordered_map<std::string, std::string> m_threadNames;
    std::vector<CustomFormatSpecifier> m_customFormatSpecifiers;
    base::threading::Mutex m_customFormatSpecifiersLock;
    base::threading::Mutex m_threadNamesLock;
    Level m_loggingLevel;
  
    friend class el::Helpers;
    friend class el::base::DefaultLogDispatchCallback;
    friend class el::LogBuilder;
    friend class el::base::MessageBuilder;
    friend class el::base::Writer;
    friend class el::base::PerformanceTracker;
    friend class el::base::LogDispatcher;
  
    void setApplicationArguments(int argc, char** argv);
  
    inline void setApplicationArguments(int argc, const char** argv) {
      setApplicationArguments(argc, const_cast<char**>(argv));
    }
  };
  extern ELPP_EXPORT base::type::StoragePointer elStorage;
  #define ELPP el::base::elStorage
  class DefaultLogDispatchCallback : public LogDispatchCallback {
   protected:
    void handle(const LogDispatchData* data);
   private:
    const LogDispatchData* m_data;
    void dispatch(base::type::string_t&& logLine, base::type::string_t&& syslogLine);
  };
  #if ELPP_ASYNC_LOGGING
  class AsyncLogDispatchCallback : public LogDispatchCallback {
   protected:
    void handle(const LogDispatchData* data);
  };
  class AsyncDispatchWorker : public base::IWorker, public base::threading::ThreadSafe {
   public:
    AsyncDispatchWorker();
    virtual ~AsyncDispatchWorker();
  
    bool clean(void);
    void emptyQueue(void);
    virtual void start(void);
    void handle(AsyncLogItem* logItem);
    void run(void);
  
    void setContinueRunning(bool value) {
      base::threading::ScopedLock scopedLock(m_continueRunningLock);
      m_continueRunning = value;
    }
  
    bool continueRunning(void) const {
      return m_continueRunning;
    }
   private:
    std::condition_variable cv;
    bool m_continueRunning;
    base::threading::Mutex m_continueRunningLock;
  };
  #endif  // ELPP_ASYNC_LOGGING
  }  // namespace base
  namespace base {
  class DefaultLogBuilder : public LogBuilder {
   public:
    base::type::string_t build(const LogMessage* logMessage, bool appendNewLine) const;
  };
  /// @brief Dispatches log messages
  class LogDispatcher : base::NoCopy {
   public:
    LogDispatcher(bool proceed, LogMessage* logMessage, base::DispatchAction dispatchAction) :
      m_proceed(proceed),
      m_logMessage(logMessage),
      m_dispatchAction(std::move(dispatchAction)) {
    }
  
    void dispatch(void);
  
   private:
    bool m_proceed;
    LogMessage* m_logMessage;
    base::DispatchAction m_dispatchAction;
  };
  #if defined(ELPP_STL_LOGGING)
  /// @brief Workarounds to write some STL logs
  ///
  /// @detail There is workaround needed to loop through some stl containers. In order to do that, we need iterable containers
  /// of same type and provide iterator interface and pass it on to writeIterator().
  /// Remember, this is passed by value in constructor so that we dont change original containers.
  /// This operation is as expensive as Big-O(std::min(class_.size(), base::consts::kMaxLogPerContainer))
  namespace workarounds {
  /// @brief Abstract IterableContainer template that provides interface for iterable classes of type T
  template <typename T, typename Container>
  class IterableContainer {
   public:
    typedef typename Container::iterator iterator;
    typedef typename Container::const_iterator const_iterator;
    IterableContainer(void) {}
    virtual ~IterableContainer(void) {}
    iterator begin(void) {
      return getContainer().begin();
    }
    iterator end(void) {
      return getContainer().end();
    }
   private:
    virtual Container& getContainer(void) = 0;
  };
  /// @brief Implements IterableContainer and provides iterable std::priority_queue class
  template<typename T, typename Container = std::vector<T>, typename Comparator = std::less<typename Container::value_type>>
  class IterablePriorityQueue : public IterableContainer<T, Container>,
    public std::priority_queue<T, Container, Comparator> {
   public:
    IterablePriorityQueue(std::priority_queue<T, Container, Comparator> queue_) {
      std::size_t count_ = 0;
      while (++count_ < base::consts::kMaxLogPerContainer && !queue_.empty()) {
        this->push(queue_.top());
        queue_.pop();
      }
    }
   private:
    inline Container& getContainer(void) {
      return this->c;
    }
  };
  /// @brief Implements IterableContainer and provides iterable std::queue class
  template<typename T, typename Container = std::deque<T>>
  class IterableQueue : public IterableContainer<T, Container>, public std::queue<T, Container> {
   public:
    IterableQueue(std::queue<T, Container> queue_) {
      std::size_t count_ = 0;
      while (++count_ < base::consts::kMaxLogPerContainer && !queue_.empty()) {
        this->push(queue_.front());
        queue_.pop();
      }
    }
   private:
    inline Container& getContainer(void) {
      return this->c;
    }
  };
  /// @brief Implements IterableContainer and provides iterable std::stack class
  template<typename T, typename Container = std::deque<T>>
  class IterableStack : public IterableContainer<T, Container>, public std::stack<T, Container> {
   public:
    IterableStack(std::stack<T, Container> stack_) {
      std::size_t count_ = 0;
      while (++count_ < base::consts::kMaxLogPerContainer && !stack_.empty()) {
        this->push(stack_.top());
        stack_.pop();
      }
    }
   private:
    inline Container& getContainer(void) {
      return this->c;
    }
  };
  }  // namespace workarounds
  #endif  // defined(ELPP_STL_LOGGING)
  // Log message builder
  class MessageBuilder {
   public:
    MessageBuilder(void) : m_logger(nullptr), m_containerLogSeperator(ELPP_LITERAL("")) {}
    void initialize(Logger* logger);
  
  #  define ELPP_SIMPLE_LOG(LOG_TYPE)\
  MessageBuilder& operator<<(LOG_TYPE msg) {\
  m_logger->stream() << msg;\
  if (ELPP->hasFlag(LoggingFlag::AutoSpacing)) {\
  m_logger->stream() << " ";\
  }\
  return *this;\
  }
  
    inline MessageBuilder& operator<<(const std::string& msg) {
      return operator<<(msg.c_str());
    }
    ELPP_SIMPLE_LOG(char)
    ELPP_SIMPLE_LOG(bool)
    ELPP_SIMPLE_LOG(signed short)
    ELPP_SIMPLE_LOG(unsigned short)
    ELPP_SIMPLE_LOG(signed int)
    ELPP_SIMPLE_LOG(unsigned int)
    ELPP_SIMPLE_LOG(signed long)
    ELPP_SIMPLE_LOG(unsigned long)
    ELPP_SIMPLE_LOG(float)
    ELPP_SIMPLE_LOG(double)
    ELPP_SIMPLE_LOG(char*)
    ELPP_SIMPLE_LOG(const char*)
    ELPP_SIMPLE_LOG(const void*)
    ELPP_SIMPLE_LOG(long double)
    inline MessageBuilder& operator<<(const std::wstring& msg) {
      return operator<<(msg.c_str());
    }
    MessageBuilder& operator<<(const wchar_t* msg);
    // ostream manipulators
    inline MessageBuilder& operator<<(std::ostream& (*OStreamMani)(std::ostream&)) {
      m_logger->stream() << OStreamMani;
      return *this;
    }
  #define ELPP_ITERATOR_CONTAINER_LOG_ONE_ARG(temp)                                                    \
  template <typename T>                                                                            \
  inline MessageBuilder& operator<<(const temp<T>& template_inst) {                                \
  return writeIterator(template_inst.begin(), template_inst.end(), template_inst.size());      \
  }
  #define ELPP_ITERATOR_CONTAINER_LOG_TWO_ARG(temp)                                                    \
  template <typename T1, typename T2>                                                              \
  inline MessageBuilder& operator<<(const temp<T1, T2>& template_inst) {                           \
  return writeIterator(template_inst.begin(), template_inst.end(), template_inst.size());      \
  }
  #define ELPP_ITERATOR_CONTAINER_LOG_THREE_ARG(temp)                                                  \
  template <typename T1, typename T2, typename T3>                                                 \
  inline MessageBuilder& operator<<(const temp<T1, T2, T3>& template_inst) {                       \
  return writeIterator(template_inst.begin(), template_inst.end(), template_inst.size());      \
  }
  #define ELPP_ITERATOR_CONTAINER_LOG_FOUR_ARG(temp)                                                   \
  template <typename T1, typename T2, typename T3, typename T4>                                    \
  inline MessageBuilder& operator<<(const temp<T1, T2, T3, T4>& template_inst) {                   \
  return writeIterator(template_inst.begin(), template_inst.end(), template_inst.size());      \
  }
  #define ELPP_ITERATOR_CONTAINER_LOG_FIVE_ARG(temp)                                                   \
  template <typename T1, typename T2, typename T3, typename T4, typename T5>                       \
  inline MessageBuilder& operator<<(const temp<T1, T2, T3, T4, T5>& template_inst) {               \
  return writeIterator(template_inst.begin(), template_inst.end(), template_inst.size());      \
  }
  
  #if defined(ELPP_STL_LOGGING)
    ELPP_ITERATOR_CONTAINER_LOG_TWO_ARG(std::vector)
    ELPP_ITERATOR_CONTAINER_LOG_TWO_ARG(std::list)
    ELPP_ITERATOR_CONTAINER_LOG_TWO_ARG(std::deque)
    ELPP_ITERATOR_CONTAINER_LOG_THREE_ARG(std::set)
    ELPP_ITERATOR_CONTAINER_LOG_THREE_ARG(std::multiset)
    ELPP_ITERATOR_CONTAINER_LOG_FOUR_ARG(std::map)
    ELPP_ITERATOR_CONTAINER_LOG_FOUR_ARG(std::multimap)
    template <class T, class Container>
    inline MessageBuilder& operator<<(const std::queue<T, Container>& queue_) {
      base::workarounds::IterableQueue<T, Container> iterableQueue_ =
        static_cast<base::workarounds::IterableQueue<T, Container> >(queue_);
      return writeIterator(iterableQueue_.begin(), iterableQueue_.end(), iterableQueue_.size());
    }
    template <class T, class Container>
    inline MessageBuilder& operator<<(const std::stack<T, Container>& stack_) {
      base::workarounds::IterableStack<T, Container> iterableStack_ =
        static_cast<base::workarounds::IterableStack<T, Container> >(stack_);
      return writeIterator(iterableStack_.begin(), iterableStack_.end(), iterableStack_.size());
    }
    template <class T, class Container, class Comparator>
    inline MessageBuilder& operator<<(const std::priority_queue<T, Container, Comparator>& priorityQueue_) {
      base::workarounds::IterablePriorityQueue<T, Container, Comparator> iterablePriorityQueue_ =
        static_cast<base::workarounds::IterablePriorityQueue<T, Container, Comparator> >(priorityQueue_);
      return writeIterator(iterablePriorityQueue_.begin(), iterablePriorityQueue_.end(), iterablePriorityQueue_.size());
    }
    template <class First, class Second>
    MessageBuilder& operator<<(const std::pair<First, Second>& pair_) {
      m_logger->stream() << ELPP_LITERAL("(");
      operator << (static_cast<First>(pair_.first));
      m_logger->stream() << ELPP_LITERAL(", ");
      operator << (static_cast<Second>(pair_.second));
      m_logger->stream() << ELPP_LITERAL(")");
      return *this;
    }
    template <std::size_t Size>
    MessageBuilder& operator<<(const std::bitset<Size>& bitset_) {
      m_logger->stream() << ELPP_LITERAL("[");
      operator << (bitset_.to_string());
      m_logger->stream() << ELPP_LITERAL("]");
      return *this;
    }
  #  if defined(ELPP_LOG_STD_ARRAY)
    template <class T, std::size_t Size>
    inline MessageBuilder& operator<<(const std::array<T, Size>& array) {
      return writeIterator(array.begin(), array.end(), array.size());
    }
  #  endif  // defined(ELPP_LOG_STD_ARRAY)
  #  if defined(ELPP_LOG_UNORDERED_MAP)
    ELPP_ITERATOR_CONTAINER_LOG_FIVE_ARG(std::unordered_map)
    ELPP_ITERATOR_CONTAINER_LOG_FIVE_ARG(std::unordered_multimap)
  #  endif  // defined(ELPP_LOG_UNORDERED_MAP)
  #  if defined(ELPP_LOG_UNORDERED_SET)
    ELPP_ITERATOR_CONTAINER_LOG_FOUR_ARG(std::unordered_set)
    ELPP_ITERATOR_CONTAINER_LOG_FOUR_ARG(std::unordered_multiset)
  #  endif  // defined(ELPP_LOG_UNORDERED_SET)
  #endif  // defined(ELPP_STL_LOGGING)
  #if defined(ELPP_QT_LOGGING)
    inline MessageBuilder& operator<<(const QString& msg) {
  #  if defined(ELPP_UNICODE)
      m_logger->stream() << msg.toStdWString();
  #  else
      m_logger->stream() << msg.toStdString();
  #  endif  // defined(ELPP_UNICODE)
      return *this;
    }
    inline MessageBuilder& operator<<(const QByteArray& msg) {
      return operator << (QString(msg));
    }
    inline MessageBuilder& operator<<(const QStringRef& msg) {
      return operator<<(msg.toString());
    }
    inline MessageBuilder& operator<<(qint64 msg) {
  #  if defined(ELPP_UNICODE)
      m_logger->stream() << QString::number(msg).toStdWString();
  #  else
      m_logger->stream() << QString::number(msg).toStdString();
  #  endif  // defined(ELPP_UNICODE)
      return *this;
    }
    inline MessageBuilder& operator<<(quint64 msg) {
  #  if defined(ELPP_UNICODE)
      m_logger->stream() << QString::number(msg).toStdWString();
  #  else
      m_logger->stream() << QString::number(msg).toStdString();
  #  endif  // defined(ELPP_UNICODE)
      return *this;
    }
    inline MessageBuilder& operator<<(QChar msg) {
      m_logger->stream() << msg.toLatin1();
      return *this;
    }
    inline MessageBuilder& operator<<(const QLatin1String& msg) {
      m_logger->stream() << msg.latin1();
      return *this;
    }
    ELPP_ITERATOR_CONTAINER_LOG_ONE_ARG(QList)
    ELPP_ITERATOR_CONTAINER_LOG_ONE_ARG(QVector)
    ELPP_ITERATOR_CONTAINER_LOG_ONE_ARG(QQueue)
    ELPP_ITERATOR_CONTAINER_LOG_ONE_ARG(QSet)
    ELPP_ITERATOR_CONTAINER_LOG_ONE_ARG(QLinkedList)
    ELPP_ITERATOR_CONTAINER_LOG_ONE_ARG(QStack)
    template <typename First, typename Second>
    MessageBuilder& operator<<(const QPair<First, Second>& pair_) {
      m_logger->stream() << ELPP_LITERAL("(");
      operator << (static_cast<First>(pair_.first));
      m_logger->stream() << ELPP_LITERAL(", ");
      operator << (static_cast<Second>(pair_.second));
      m_logger->stream() << ELPP_LITERAL(")");
      return *this;
    }
    template <typename K, typename V>
    MessageBuilder& operator<<(const QMap<K, V>& map_) {
      m_logger->stream() << ELPP_LITERAL("[");
      QList<K> keys = map_.keys();
      typename QList<K>::const_iterator begin = keys.begin();
      typename QList<K>::const_iterator end = keys.end();
      int max_ = static_cast<int>(base::consts::kMaxLogPerContainer);  // to prevent warning
      for (int index_ = 0; begin != end && index_ < max_; ++index_, ++begin) {
        m_logger->stream() << ELPP_LITERAL("(");
        operator << (static_cast<K>(*begin));
        m_logger->stream() << ELPP_LITERAL(", ");
        operator << (static_cast<V>(map_.value(*begin)));
        m_logger->stream() << ELPP_LITERAL(")");
        m_logger->stream() << ((index_ < keys.size() -1) ? m_containerLogSeperator : ELPP_LITERAL(""));
      }
      if (begin != end) {
        m_logger->stream() << ELPP_LITERAL("...");
      }
      m_logger->stream() << ELPP_LITERAL("]");
      return *this;
    }
    template <typename K, typename V>
    inline MessageBuilder& operator<<(const QMultiMap<K, V>& map_) {
      operator << (static_cast<QMap<K, V>>(map_));
      return *this;
    }
    template <typename K, typename V>
    MessageBuilder& operator<<(const QHash<K, V>& hash_) {
      m_logger->stream() << ELPP_LITERAL("[");
      QList<K> keys = hash_.keys();
      typename QList<K>::const_iterator begin = keys.begin();
      typename QList<K>::const_iterator end = keys.end();
      int max_ = static_cast<int>(base::consts::kMaxLogPerContainer);  // prevent type warning
      for (int index_ = 0; begin != end && index_ < max_; ++index_, ++begin) {
        m_logger->stream() << ELPP_LITERAL("(");
        operator << (static_cast<K>(*begin));
        m_logger->stream() << ELPP_LITERAL(", ");
        operator << (static_cast<V>(hash_.value(*begin)));
        m_logger->stream() << ELPP_LITERAL(")");
        m_logger->stream() << ((index_ < keys.size() -1) ? m_containerLogSeperator : ELPP_LITERAL(""));
      }
      if (begin != end) {
        m_logger->stream() << ELPP_LITERAL("...");
      }
      m_logger->stream() << ELPP_LITERAL("]");
      return *this;
    }
    template <typename K, typename V>
    inline MessageBuilder& operator<<(const QMultiHash<K, V>& multiHash_) {
      operator << (static_cast<QHash<K, V>>(multiHash_));
      return *this;
    }
  #endif  // defined(ELPP_QT_LOGGING)
  #if defined(ELPP_BOOST_LOGGING)
    ELPP_ITERATOR_CONTAINER_LOG_TWO_ARG(boost::container::vector)
    ELPP_ITERATOR_CONTAINER_LOG_TWO_ARG(boost::container::stable_vector)
    ELPP_ITERATOR_CONTAINER_LOG_TWO_ARG(boost::container::list)
    ELPP_ITERATOR_CONTAINER_LOG_TWO_ARG(boost::container::deque)
    ELPP_ITERATOR_CONTAINER_LOG_FOUR_ARG(boost::container::map)
    ELPP_ITERATOR_CONTAINER_LOG_FOUR_ARG(boost::container::flat_map)
    ELPP_ITERATOR_CONTAINER_LOG_THREE_ARG(boost::container::set)
    ELPP_ITERATOR_CONTAINER_LOG_THREE_ARG(boost::container::flat_set)
  #endif  // defined(ELPP_BOOST_LOGGING)
  
    /// @brief Macro used internally that can be used externally to make containers easylogging++ friendly
    ///
    /// @detail This macro expands to write an ostream& operator<< for container. This container is expected to
    ///         have begin() and end() methods that return respective iterators
    /// @param ContainerType Type of container e.g, MyList from WX_DECLARE_LIST(int, MyList); in wxwidgets
    /// @param SizeMethod Method used to get size of container.
    /// @param ElementInstance Instance of element to be fed out. Insance name is "elem". See WXELPP_ENABLED macro
    ///        for an example usage
  #define MAKE_CONTAINERELPP_FRIENDLY(ContainerType, SizeMethod, ElementInstance) \
  el::base::type::ostream_t& operator<<(el::base::type::ostream_t& ss, const ContainerType& container) {\
  const el::base::type::char_t* sep = ELPP->hasFlag(el::LoggingFlag::NewLineForContainer) ? \
  ELPP_LITERAL("\n    ") : ELPP_LITERAL(", ");\
  ContainerType::const_iterator elem = container.begin();\
  ContainerType::const_iterator endElem = container.end();\
  std::size_t size_ = container.SizeMethod; \
  ss << ELPP_LITERAL("[");\
  for (std::size_t i = 0; elem != endElem && i < el::base::consts::kMaxLogPerContainer; ++i, ++elem) { \
  ss << ElementInstance;\
  ss << ((i < size_ - 1) ? sep : ELPP_LITERAL(""));\
  }\
  if (elem != endElem) {\
  ss << ELPP_LITERAL("...");\
  }\
  ss << ELPP_LITERAL("]");\
  return ss;\
  }
  #if defined(ELPP_WXWIDGETS_LOGGING)
    ELPP_ITERATOR_CONTAINER_LOG_ONE_ARG(wxVector)
  #  define ELPP_WX_PTR_ENABLED(ContainerType) MAKE_CONTAINERELPP_FRIENDLY(ContainerType, size(), *(*elem))
  #  define ELPP_WX_ENABLED(ContainerType) MAKE_CONTAINERELPP_FRIENDLY(ContainerType, size(), (*elem))
  #  define ELPP_WX_HASH_MAP_ENABLED(ContainerType) MAKE_CONTAINERELPP_FRIENDLY(ContainerType, size(), \
  ELPP_LITERAL("(") << elem->first << ELPP_LITERAL(", ") << elem->second << ELPP_LITERAL(")")
  #else
  #  define ELPP_WX_PTR_ENABLED(ContainerType)
  #  define ELPP_WX_ENABLED(ContainerType)
  #  define ELPP_WX_HASH_MAP_ENABLED(ContainerType)
  #endif  // defined(ELPP_WXWIDGETS_LOGGING)
    // Other classes
    template <class Class>
    ELPP_SIMPLE_LOG(const Class&)
  #undef ELPP_SIMPLE_LOG
  #undef ELPP_ITERATOR_CONTAINER_LOG_ONE_ARG
  #undef ELPP_ITERATOR_CONTAINER_LOG_TWO_ARG
  #undef ELPP_ITERATOR_CONTAINER_LOG_THREE_ARG
  #undef ELPP_ITERATOR_CONTAINER_LOG_FOUR_ARG
  #undef ELPP_ITERATOR_CONTAINER_LOG_FIVE_ARG
   private:
    Logger* m_logger;
    const base::type::char_t* m_containerLogSeperator;
  
    template<class Iterator>
    MessageBuilder& writeIterator(Iterator begin_, Iterator end_, std::size_t size_) {
      m_logger->stream() << ELPP_LITERAL("[");
      for (std::size_t i = 0; begin_ != end_ && i < base::consts::kMaxLogPerContainer; ++i, ++begin_) {
        operator << (*begin_);
        m_logger->stream() << ((i < size_ - 1) ? m_containerLogSeperator : ELPP_LITERAL(""));
      }
      if (begin_ != end_) {
        m_logger->stream() << ELPP_LITERAL("...");
      }
      m_logger->stream() << ELPP_LITERAL("]");
      if (ELPP->hasFlag(LoggingFlag::AutoSpacing)) {
        m_logger->stream() << " ";
      }
      return *this;
    }
  };
  /// @brief Writes nothing - Used when certain log is disabled
  class NullWriter : base::NoCopy {
   public:
    NullWriter(void) {}
  
    // Null manipulator
    inline NullWriter& operator<<(std::ostream& (*)(std::ostream&)) {
      return *this;
    }
  
    template <typename T>
    inline NullWriter& operator<<(const T&) {
      return *this;
    }
  
    inline operator bool() {
      return true;
    }
  };
  /// @brief Main entry point of each logging
  class Writer : base::NoCopy {
   public:
    Writer(Level level, const char* file, base::type::LineNumber line,
           const char* func, base::DispatchAction dispatchAction = base::DispatchAction::NormalLog,
           base::type::VerboseLevel verboseLevel = 0) :
      m_msg(nullptr), m_level(level), m_file(file), m_line(line), m_func(func), m_verboseLevel(verboseLevel),
      m_logger(nullptr), m_proceed(false), m_dispatchAction(dispatchAction) {
    }
  
    Writer(LogMessage* msg, base::DispatchAction dispatchAction = base::DispatchAction::NormalLog) :
      m_msg(msg), m_level(msg != nullptr ? msg->level() : Level::Unknown),
      m_line(0), m_logger(nullptr), m_proceed(false), m_dispatchAction(dispatchAction) {
    }
  
    virtual ~Writer(void) {
      processDispatch();
    }
  
    template <typename T>
    inline Writer& operator<<(const T& log) {
  #if ELPP_LOGGING_ENABLED
      if (m_proceed) {
        m_messageBuilder << log;
      }
  #endif  // ELPP_LOGGING_ENABLED
      return *this;
    }
  
    inline Writer& operator<<(std::ostream& (*log)(std::ostream&)) {
  #if ELPP_LOGGING_ENABLED
      if (m_proceed) {
        m_messageBuilder << log;
      }
  #endif  // ELPP_LOGGING_ENABLED
      return *this;
    }
  
    inline operator bool() {
      return true;
    }
  
    Writer& construct(Logger* logger, bool needLock = true);
    Writer& construct(int count, const char* loggerIds, ...);
   protected:
    LogMessage* m_msg;
    Level m_level;
    const char* m_file;
    const base::type::LineNumber m_line;
    const char* m_func;
    base::type::VerboseLevel m_verboseLevel;
    Logger* m_logger;
    bool m_proceed;
    base::MessageBuilder m_messageBuilder;
    base::DispatchAction m_dispatchAction;
    std::vector<std::string> m_loggerIds;
    friend class el::Helpers;
  
    void initializeLogger(const std::string& loggerId, bool lookup = true, bool needLock = true);
    void processDispatch();
    void triggerDispatch(void);
  };
  class PErrorWriter : public base::Writer {
   public:
    PErrorWriter(Level level, const char* file, base::type::LineNumber line,
                 const char* func, base::DispatchAction dispatchAction = base::DispatchAction::NormalLog,
                 base::type::VerboseLevel verboseLevel = 0) :
      base::Writer(level, file, line, func, dispatchAction, verboseLevel) {
    }
  
    virtual ~PErrorWriter(void);
  };
  }  // namespace base
  // Logging from Logger class. Why this is here? Because we have Storage and Writer class available
  #if ELPP_VARIADIC_TEMPLATES_SUPPORTED
  template <typename T, typename... Args>
  void Logger::log_(Level level, int vlevel, const char* s, const T& value, const Args&... args) {
    base::MessageBuilder b;
    b.initialize(this);
    while (*s) {
      if (*s == base::consts::kFormatSpecifierChar) {
        if (*(s + 1) == base::consts::kFormatSpecifierChar) {
          ++s;
        } else {
          if (*(s + 1) == base::consts::kFormatSpecifierCharValue) {
            ++s;
            b << value;
            log_(level, vlevel, ++s, args...);
            return;
          }
        }
      }
      b << *s++;
    }
    ELPP_INTERNAL_ERROR("Too many arguments provided. Unable to handle. Please provide more format specifiers", false);
  }
  template <typename T>
  void Logger::log_(Level level, int vlevel, const T& log) {
    if (level == Level::Verbose) {
      if (ELPP->vRegistry()->allowed(vlevel, __FILE__)) {
        base::Writer(Level::Verbose, "FILE", 0, "FUNCTION",
                     base::DispatchAction::NormalLog, vlevel).construct(this, false) << log;
      } else {
        stream().str(ELPP_LITERAL(""));
        releaseLock();
      }
    } else {
      base::Writer(level, "FILE", 0, "FUNCTION").construct(this, false) << log;
    }
  }
  template <typename T, typename... Args>
  inline void Logger::log(Level level, const char* s, const T& value, const Args&... args) {
    acquireLock(); // released in Writer!
    log_(level, 0, s, value, args...);
  }
  template <typename T>
  inline void Logger::log(Level level, const T& log) {
    acquireLock(); // released in Writer!
    log_(level, 0, log);
  }
  #  if ELPP_VERBOSE_LOG
  template <typename T, typename... Args>
  inline void Logger::verbose(int vlevel, const char* s, const T& value, const Args&... args) {
    acquireLock(); // released in Writer!
    log_(el::Level::Verbose, vlevel, s, value, args...);
  }
  template <typename T>
  inline void Logger::verbose(int vlevel, const T& log) {
    acquireLock(); // released in Writer!
    log_(el::Level::Verbose, vlevel, log);
  }
  #  else
  template <typename T, typename... Args>
  inline void Logger::verbose(int, const char*, const T&, const Args&...) {
    return;
  }
  template <typename T>
  inline void Logger::verbose(int, const T&) {
    return;
  }
  #  endif  // ELPP_VERBOSE_LOG
  #  define LOGGER_LEVEL_WRITERS(FUNCTION_NAME, LOG_LEVEL)\
  template <typename T, typename... Args>\
  inline void Logger::FUNCTION_NAME(const char* s, const T& value, const Args&... args) {\
  log(LOG_LEVEL, s, value, args...);\
  }\
  template <typename T>\
  inline void Logger::FUNCTION_NAME(const T& value) {\
  log(LOG_LEVEL, value);\
  }
  #  define LOGGER_LEVEL_WRITERS_DISABLED(FUNCTION_NAME, LOG_LEVEL)\
  template <typename T, typename... Args>\
  inline void Logger::FUNCTION_NAME(const char*, const T&, const Args&...) {\
  return;\
  }\
  template <typename T>\
  inline void Logger::FUNCTION_NAME(const T&) {\
  return;\
  }
  
  #  if ELPP_INFO_LOG
  LOGGER_LEVEL_WRITERS(info, Level::Info)
  #  else
  LOGGER_LEVEL_WRITERS_DISABLED(info, Level::Info)
  #  endif // ELPP_INFO_LOG
  #  if ELPP_DEBUG_LOG
  LOGGER_LEVEL_WRITERS(debug, Level::Debug)
  #  else
  LOGGER_LEVEL_WRITERS_DISABLED(debug, Level::Debug)
  #  endif // ELPP_DEBUG_LOG
  #  if ELPP_WARNING_LOG
  LOGGER_LEVEL_WRITERS(warn, Level::Warning)
  #  else
  LOGGER_LEVEL_WRITERS_DISABLED(warn, Level::Warning)
  #  endif // ELPP_WARNING_LOG
  #  if ELPP_ERROR_LOG
  LOGGER_LEVEL_WRITERS(error, Level::Error)
  #  else
  LOGGER_LEVEL_WRITERS_DISABLED(error, Level::Error)
  #  endif // ELPP_ERROR_LOG
  #  if ELPP_FATAL_LOG
  LOGGER_LEVEL_WRITERS(fatal, Level::Fatal)
  #  else
  LOGGER_LEVEL_WRITERS_DISABLED(fatal, Level::Fatal)
  #  endif // ELPP_FATAL_LOG
  #  if ELPP_TRACE_LOG
  LOGGER_LEVEL_WRITERS(trace, Level::Trace)
  #  else
  LOGGER_LEVEL_WRITERS_DISABLED(trace, Level::Trace)
  #  endif // ELPP_TRACE_LOG
  #  undef LOGGER_LEVEL_WRITERS
  #  undef LOGGER_LEVEL_WRITERS_DISABLED
  #endif // ELPP_VARIADIC_TEMPLATES_SUPPORTED
  #if ELPP_COMPILER_MSVC
  #  define ELPP_VARIADIC_FUNC_MSVC(variadicFunction, variadicArgs) variadicFunction variadicArgs
  #  define ELPP_VARIADIC_FUNC_MSVC_RUN(variadicFunction, ...) ELPP_VARIADIC_FUNC_MSVC(variadicFunction, (__VA_ARGS__))
  #  define el_getVALength(...) ELPP_VARIADIC_FUNC_MSVC_RUN(el_resolveVALength, 0, ## __VA_ARGS__,\
  10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
  #else
  #  if ELPP_COMPILER_CLANG
  #    define el_getVALength(...) el_resolveVALength(0, __VA_ARGS__, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
  #  else
  #    define el_getVALength(...) el_resolveVALength(0, ## __VA_ARGS__, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
  #  endif // ELPP_COMPILER_CLANG
  #endif // ELPP_COMPILER_MSVC
  #define el_resolveVALength(_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, N, ...) N
  #define ELPP_WRITE_LOG(writer, level, dispatchAction, ...) \
  writer(level, __FILE__, __LINE__, ELPP_FUNC, dispatchAction).construct(el_getVALength(__VA_ARGS__), __VA_ARGS__)
  #define ELPP_WRITE_LOG_IF(writer, condition, level, dispatchAction, ...) if (condition) \
  writer(level, __FILE__, __LINE__, ELPP_FUNC, dispatchAction).construct(el_getVALength(__VA_ARGS__), __VA_ARGS__)
  #define ELPP_WRITE_LOG_EVERY_N(writer, occasion, level, dispatchAction, ...) \
  ELPP->validateEveryNCounter(__FILE__, __LINE__, occasion) && \
  writer(level, __FILE__, __LINE__, ELPP_FUNC, dispatchAction).construct(el_getVALength(__VA_ARGS__), __VA_ARGS__)
  #define ELPP_WRITE_LOG_AFTER_N(writer, n, level, dispatchAction, ...) \
  ELPP->validateAfterNCounter(__FILE__, __LINE__, n) && \
  writer(level, __FILE__, __LINE__, ELPP_FUNC, dispatchAction).construct(el_getVALength(__VA_ARGS__), __VA_ARGS__)
  #define ELPP_WRITE_LOG_N_TIMES(writer, n, level, dispatchAction, ...) \
  ELPP->validateNTimesCounter(__FILE__, __LINE__, n) && \
  writer(level, __FILE__, __LINE__, ELPP_FUNC, dispatchAction).construct(el_getVALength(__VA_ARGS__), __VA_ARGS__)
  #if defined(ELPP_FEATURE_ALL) || defined(ELPP_FEATURE_PERFORMANCE_TRACKING)
  class PerformanceTrackingData {
   public:
    enum class DataType : base::type::EnumType {
      Checkpoint = 1, Complete = 2
    };
    // Do not use constructor, will run into multiple definition error, use init(PerformanceTracker*)
    explicit PerformanceTrackingData(DataType dataType) : m_performanceTracker(nullptr),
      m_dataType(dataType), m_firstCheckpoint(false), m_file(""), m_line(0), m_func("") {}
    inline const std::string* blockName(void) const;
    inline const struct timeval* startTime(void) const;
    inline const struct timeval* endTime(void) const;
    inline const struct timeval* lastCheckpointTime(void) const;
    inline const base::PerformanceTracker* performanceTracker(void) const {
      return m_performanceTracker;
    }
    inline PerformanceTrackingData::DataType dataType(void) const {
      return m_dataType;
    }
    inline bool firstCheckpoint(void) const {
      return m_firstCheckpoint;
    }
    inline std::string checkpointId(void) const {
      return m_checkpointId;
    }
    inline const char* file(void) const {
      return m_file;
    }
    inline base::type::LineNumber line(void) const {
      return m_line;
    }
    inline const char* func(void) const {
      return m_func;
    }
    inline const base::type::string_t* formattedTimeTaken() const {
      return &m_formattedTimeTaken;
    }
    inline const std::string& loggerId(void) const;
   private:
    base::PerformanceTracker* m_performanceTracker;
    base::type::string_t m_formattedTimeTaken;
    PerformanceTrackingData::DataType m_dataType;
    bool m_firstCheckpoint;
    std::string m_checkpointId;
    const char* m_file;
    base::type::LineNumber m_line;
    const char* m_func;
    inline void init(base::PerformanceTracker* performanceTracker, bool firstCheckpoint = false) {
      m_performanceTracker = performanceTracker;
      m_firstCheckpoint = firstCheckpoint;
    }
  
    friend class el::base::PerformanceTracker;
  };
  namespace base {
  /// @brief Represents performanceTracker block of code that conditionally adds performance status to log
  ///        either when goes outside the scope of when checkpoint() is called
  class PerformanceTracker : public base::threading::ThreadSafe, public Loggable {
   public:
    PerformanceTracker(const std::string& blockName,
                       base::TimestampUnit timestampUnit = base::TimestampUnit::Millisecond,
                       const std::string& loggerId = std::string(el::base::consts::kPerformanceLoggerId),
                       bool scopedLog = true, Level level = base::consts::kPerformanceTrackerDefaultLevel);
    /// @brief Copy constructor
    PerformanceTracker(const PerformanceTracker& t) :
      m_blockName(t.m_blockName), m_timestampUnit(t.m_timestampUnit), m_loggerId(t.m_loggerId), m_scopedLog(t.m_scopedLog),
      m_level(t.m_level), m_hasChecked(t.m_hasChecked), m_lastCheckpointId(t.m_lastCheckpointId), m_enabled(t.m_enabled),
      m_startTime(t.m_startTime), m_endTime(t.m_endTime), m_lastCheckpointTime(t.m_lastCheckpointTime) {
    }
    virtual ~PerformanceTracker(void);
    /// @brief A checkpoint for current performanceTracker block.
    void checkpoint(const std::string& id = std::string(), const char* file = __FILE__,
                    base::type::LineNumber line = __LINE__,
                    const char* func = "");
    inline Level level(void) const {
      return m_level;
    }
   private:
    std::string m_blockName;
    base::TimestampUnit m_timestampUnit;
    std::string m_loggerId;
    bool m_scopedLog;
    Level m_level;
    bool m_hasChecked;
    std::string m_lastCheckpointId;
    bool m_enabled;
    struct timeval m_startTime, m_endTime, m_lastCheckpointTime;
  
    PerformanceTracker(void);
  
    friend class el::PerformanceTrackingData;
    friend class base::DefaultPerformanceTrackingCallback;
  
    const inline base::type::string_t getFormattedTimeTaken() const {
      return getFormattedTimeTaken(m_startTime);
    }
  
    const base::type::string_t getFormattedTimeTaken(struct timeval startTime) const;
  
    virtual inline void log(el::base::type::ostream_t& os) const {
      os << getFormattedTimeTaken();
    }
  };
  class DefaultPerformanceTrackingCallback : public PerformanceTrackingCallback {
   protected:
    void handle(const PerformanceTrackingData* data) {
      m_data = data;
      base::type::stringstream_t ss;
      if (m_data->dataType() == PerformanceTrackingData::DataType::Complete) {
        ss << ELPP_LITERAL("Executed [") << m_data->blockName()->c_str() << ELPP_LITERAL("] in [") <<
           *m_data->formattedTimeTaken() << ELPP_LITERAL("]");
      } else {
        ss << ELPP_LITERAL("Performance checkpoint");
        if (!m_data->checkpointId().empty()) {
          ss << ELPP_LITERAL(" [") << m_data->checkpointId().c_str() << ELPP_LITERAL("]");
        }
        ss << ELPP_LITERAL(" for block [") << m_data->blockName()->c_str() << ELPP_LITERAL("] : [") <<
           *m_data->performanceTracker();
        if (!ELPP->hasFlag(LoggingFlag::DisablePerformanceTrackingCheckpointComparison)
            && m_data->performanceTracker()->m_hasChecked) {
          ss << ELPP_LITERAL(" ([") << *m_data->formattedTimeTaken() << ELPP_LITERAL("] from ");
          if (m_data->performanceTracker()->m_lastCheckpointId.empty()) {
            ss << ELPP_LITERAL("last checkpoint");
          } else {
            ss << ELPP_LITERAL("checkpoint '") << m_data->performanceTracker()->m_lastCheckpointId.c_str() << ELPP_LITERAL("'");
          }
          ss << ELPP_LITERAL(")]");
        } else {
          ss << ELPP_LITERAL("]");
        }
      }
      el::base::Writer(m_data->performanceTracker()->level(), m_data->file(), m_data->line(), m_data->func()).construct(1,
          m_data->loggerId().c_str()) << ss.str();
    }
   private:
    const PerformanceTrackingData* m_data;
  };
  }  // namespace base
  inline const std::string* PerformanceTrackingData::blockName() const {
    return const_cast<const std::string*>(&m_performanceTracker->m_blockName);
  }
  inline const struct timeval* PerformanceTrackingData::startTime() const {
    return const_cast<const struct timeval*>(&m_performanceTracker->m_startTime);
  }
  inline const struct timeval* PerformanceTrackingData::endTime() const {
    return const_cast<const struct timeval*>(&m_performanceTracker->m_endTime);
  }
  inline const struct timeval* PerformanceTrackingData::lastCheckpointTime() const {
    return const_cast<const struct timeval*>(&m_performanceTracker->m_lastCheckpointTime);
  }
  inline const std::string& PerformanceTrackingData::loggerId(void) const {
    return m_performanceTracker->m_loggerId;
  }
  #endif // defined(ELPP_FEATURE_ALL) || defined(ELPP_FEATURE_PERFORMANCE_TRACKING)
  namespace base {
  /// @brief Contains some internal debugging tools like crash handler and stack tracer
  namespace debug {
  #if defined(ELPP_FEATURE_ALL) || defined(ELPP_FEATURE_CRASH_LOG)
  class StackTrace : base::NoCopy {
   public:
    static const unsigned int kMaxStack = 64;
    static const unsigned int kStackStart = 2;  // We want to skip c'tor and StackTrace::generateNew()
    class StackTraceEntry {
     public:
      StackTraceEntry(std::size_t index, const std::string& loc, const std::string& demang, const std::string& hex,
                      const std::string& addr);
      StackTraceEntry(std::size_t index, const std::string& loc) :
        m_index(index),
        m_location(loc) {
      }
      std::size_t m_index;
      std::string m_location;
      std::string m_demangled;
      std::string m_hex;
      std::string m_addr;
      friend std::ostream& operator<<(std::ostream& ss, const StackTraceEntry& si);
  
     private:
      StackTraceEntry(void);
    };
  
    StackTrace(void) {
      generateNew();
    }
  
    virtual ~StackTrace(void) {
    }
  
    inline std::vector<StackTraceEntry>& getLatestStack(void) {
      return m_stack;
    }
  
    friend std::ostream& operator<<(std::ostream& os, const StackTrace& st);
  
   private:
    std::vector<StackTraceEntry> m_stack;
  
    void generateNew(void);
  };
  /// @brief Handles unexpected crashes
  class CrashHandler : base::NoCopy {
   public:
    typedef void (*Handler)(int);
  
    explicit CrashHandler(bool useDefault);
    explicit CrashHandler(const Handler& cHandler) {
      setHandler(cHandler);
    }
    void setHandler(const Handler& cHandler);
  
   private:
    Handler m_handler;
  };
  #else
  class CrashHandler {
   public:
    explicit CrashHandler(bool) {}
  };
  #endif // defined(ELPP_FEATURE_ALL) || defined(ELPP_FEATURE_CRASH_LOG)
  }  // namespace debug
  }  // namespace base
  extern base::debug::CrashHandler elCrashHandler;
  #define MAKE_LOGGABLE(ClassType, ClassInstance, OutputStreamInstance) \
  el::base::type::ostream_t& operator<<(el::base::type::ostream_t& OutputStreamInstance, const ClassType& ClassInstance)
  /// @brief Initializes syslog with process ID, options and facility. calls closelog() on d'tor
  class SysLogInitializer {
   public:
    SysLogInitializer(const char* processIdent, int options = 0, int facility = 0) {
  #if defined(ELPP_SYSLOG)
      openlog(processIdent, options, facility);
  #else
      ELPP_UNUSED(processIdent);
      ELPP_UNUSED(options);
      ELPP_UNUSED(facility);
  #endif  // defined(ELPP_SYSLOG)
    }
    virtual ~SysLogInitializer(void) {
  #if defined(ELPP_SYSLOG)
      closelog();
  #endif  // defined(ELPP_SYSLOG)
    }
  };
  #define ELPP_INITIALIZE_SYSLOG(id, opt, fac) el::SysLogInitializer elSyslogInit(id, opt, fac)
  /// @brief Static helpers for developers
  class Helpers : base::StaticClass {
   public:
    /// @brief Shares logging repository (base::Storage)
    static inline void setStorage(base::type::StoragePointer storage) {
      ELPP = storage;
    }
    /// @return Main storage repository
    static inline base::type::StoragePointer storage() {
      return ELPP;
    }
    /// @brief Sets application arguments and figures out whats active for logging and whats not.
    static inline void setArgs(int argc, char** argv) {
      ELPP->setApplicationArguments(argc, argv);
    }
    /// @copydoc setArgs(int argc, char** argv)
    static inline void setArgs(int argc, const char** argv) {
      ELPP->setApplicationArguments(argc, const_cast<char**>(argv));
    }
    /// @brief Sets thread name for current thread. Requires std::thread
    static inline void setThreadName(const std::string& name) {
      ELPP->setThreadName(name);
    }
    static inline std::string getThreadName() {
      return ELPP->getThreadName(base::threading::getCurrentThreadId());
    }
  #if defined(ELPP_FEATURE_ALL) || defined(ELPP_FEATURE_CRASH_LOG)
    /// @brief Overrides default crash handler and installs custom handler.
    /// @param crashHandler A functor with no return type that takes single int argument.
    ///        Handler is a typedef with specification: void (*Handler)(int)
    static inline void setCrashHandler(const el::base::debug::CrashHandler::Handler& crashHandler) {
      el::elCrashHandler.setHandler(crashHandler);
    }
    /// @brief Abort due to crash with signal in parameter
    /// @param sig Crash signal
    static void crashAbort(int sig, const char* sourceFile = "", unsigned int long line = 0);
    /// @brief Logs reason of crash as per sig
    /// @param sig Crash signal
    /// @param stackTraceIfAvailable Includes stack trace if available
    /// @param level Logging level
    /// @param logger Logger to use for logging
    static void logCrashReason(int sig, bool stackTraceIfAvailable = false,
                               Level level = Level::Fatal, const char* logger = base::consts::kDefaultLoggerId);
  #endif // defined(ELPP_FEATURE_ALL) || defined(ELPP_FEATURE_CRASH_LOG)
    /// @brief Installs pre rollout callback, this callback is triggered when log file is about to be rolled out
    ///        (can be useful for backing up)
    static inline void installPreRollOutCallback(const PreRollOutCallback& callback) {
      ELPP->setPreRollOutCallback(callback);
    }
    /// @brief Uninstalls pre rollout callback
    static inline void uninstallPreRollOutCallback(void) {
      ELPP->unsetPreRollOutCallback();
    }
    /// @brief Installs post log dispatch callback, this callback is triggered when log is dispatched
    template <typename T>
    static inline bool installLogDispatchCallback(const std::string& id) {
      return ELPP->installLogDispatchCallback<T>(id);
    }
    /// @brief Uninstalls log dispatch callback
    template <typename T>
    static inline void uninstallLogDispatchCallback(const std::string& id) {
      ELPP->uninstallLogDispatchCallback<T>(id);
    }
    template <typename T>
    static inline T* logDispatchCallback(const std::string& id) {
      return ELPP->logDispatchCallback<T>(id);
    }
  #if defined(ELPP_FEATURE_ALL) || defined(ELPP_FEATURE_PERFORMANCE_TRACKING)
    /// @brief Installs post performance tracking callback, this callback is triggered when performance tracking is finished
    template <typename T>
    static inline bool installPerformanceTrackingCallback(const std::string& id) {
      return ELPP->installPerformanceTrackingCallback<T>(id);
    }
    /// @brief Uninstalls post performance tracking handler
    template <typename T>
    static inline void uninstallPerformanceTrackingCallback(const std::string& id) {
      ELPP->uninstallPerformanceTrackingCallback<T>(id);
    }
    template <typename T>
    static inline T* performanceTrackingCallback(const std::string& id) {
      return ELPP->performanceTrackingCallback<T>(id);
    }
  #endif // defined(ELPP_FEATURE_ALL) || defined(ELPP_FEATURE_PERFORMANCE_TRACKING)
    /// @brief Converts template to std::string - useful for loggable classes to log containers within log(std::ostream&) const
    template <typename T>
    static std::string convertTemplateToStdString(const T& templ) {
      el::Logger* logger =
        ELPP->registeredLoggers()->get(el::base::consts::kDefaultLoggerId);
      if (logger == nullptr) {
        return std::string();
      }
      base::MessageBuilder b;
      b.initialize(logger);
      logger->acquireLock();
      b << templ;
  #if defined(ELPP_UNICODE)
      std::string s = std::string(logger->stream().str().begin(), logger->stream().str().end());
  #else
      std::string s = logger->stream().str();
  #endif  // defined(ELPP_UNICODE)
      logger->stream().str(ELPP_LITERAL(""));
      logger->releaseLock();
      return s;
    }
    /// @brief Returns command line arguments (pointer) provided to easylogging++
    static inline const el::base::utils::CommandLineArgs* commandLineArgs(void) {
      return ELPP->commandLineArgs();
    }
    /// @brief Reserve space for custom format specifiers for performance
    /// @see std::vector::reserve
    static inline void reserveCustomFormatSpecifiers(std::size_t size) {
      ELPP->m_customFormatSpecifiers.reserve(size);
    }
    /// @brief Installs user defined format specifier and handler
    static inline void installCustomFormatSpecifier(const CustomFormatSpecifier& customFormatSpecifier) {
      ELPP->installCustomFormatSpecifier(customFormatSpecifier);
    }
    /// @brief Uninstalls user defined format specifier and handler
    static inline bool uninstallCustomFormatSpecifier(const char* formatSpecifier) {
      return ELPP->uninstallCustomFormatSpecifier(formatSpecifier);
    }
    /// @brief Returns true if custom format specifier is installed
    static inline bool hasCustomFormatSpecifier(const char* formatSpecifier) {
      return ELPP->hasCustomFormatSpecifier(formatSpecifier);
    }
    static inline void validateFileRolling(Logger* logger, Level level) {
      if (ELPP == nullptr || logger == nullptr) return;
      logger->m_typedConfigurations->validateFileRolling(level, ELPP->preRollOutCallback());
    }
  };
  /// @brief Static helpers to deal with loggers and their configurations
  class Loggers : base::StaticClass {
   public:
    /// @brief Gets existing or registers new logger
    static Logger* getLogger(const std::string& identity, bool registerIfNotAvailable = true);
    /// @brief Changes default log builder for future loggers
    static void setDefaultLogBuilder(el::LogBuilderPtr& logBuilderPtr);
    /// @brief Installs logger registration callback, this callback is triggered when new logger is registered
    template <typename T>
    static inline bool installLoggerRegistrationCallback(const std::string& id) {
      return ELPP->registeredLoggers()->installLoggerRegistrationCallback<T>(id);
    }
    /// @brief Uninstalls log dispatch callback
    template <typename T>
    static inline void uninstallLoggerRegistrationCallback(const std::string& id) {
      ELPP->registeredLoggers()->uninstallLoggerRegistrationCallback<T>(id);
    }
    template <typename T>
    static inline T* loggerRegistrationCallback(const std::string& id) {
      return ELPP->registeredLoggers()->loggerRegistrationCallback<T>(id);
    }
    /// @brief Unregisters logger - use it only when you know what you are doing, you may unregister
    ///        loggers initialized / used by third-party libs.
    static bool unregisterLogger(const std::string& identity);
    /// @brief Whether or not logger with id is registered
    static bool hasLogger(const std::string& identity);
    /// @brief Reconfigures specified logger with new configurations
    static Logger* reconfigureLogger(Logger* logger, const Configurations& configurations);
    /// @brief Reconfigures logger with new configurations after looking it up using identity
    static Logger* reconfigureLogger(const std::string& identity, const Configurations& configurations);
    /// @brief Reconfigures logger's single configuration
    static Logger* reconfigureLogger(const std::string& identity, ConfigurationType configurationType,
                                     const std::string& value);
    /// @brief Reconfigures all the existing loggers with new configurations
    static void reconfigureAllLoggers(const Configurations& configurations);
    /// @brief Reconfigures single configuration for all the loggers
    static inline void reconfigureAllLoggers(ConfigurationType configurationType, const std::string& value) {
      reconfigureAllLoggers(Level::Global, configurationType, value);
    }
    /// @brief Reconfigures single configuration for all the loggers for specified level
    static void reconfigureAllLoggers(Level level, ConfigurationType configurationType,
                                      const std::string& value);
    /// @brief Sets default configurations. This configuration is used for future (and conditionally for existing) loggers
    static void setDefaultConfigurations(const Configurations& configurations,
                                         bool reconfigureExistingLoggers = false);
    /// @brief Returns current default
    static const Configurations* defaultConfigurations(void);
    /// @brief Returns log stream reference pointer if needed by user
    static const base::LogStreamsReferenceMapPtr logStreamsReference(void);
    /// @brief Default typed configuration based on existing defaultConf
    static base::TypedConfigurations defaultTypedConfigurations(void);
    /// @brief Populates all logger IDs in current repository.
    /// @param [out] targetList List of fill up.
    static std::vector<std::string>* populateAllLoggerIds(std::vector<std::string>* targetList);
    /// @brief Sets configurations from global configuration file.
    static void configureFromGlobal(const char* globalConfigurationFilePath);
    /// @brief Configures loggers using command line arg. Ensure you have already set command line args,
    /// @return False if invalid argument or argument with no value provided, true if attempted to configure logger.
    ///         If true is returned that does not mean it has been configured successfully, it only means that it
    ///         has attempted to configure logger using configuration file provided in argument
    static bool configureFromArg(const char* argKey);
    /// @brief Flushes all loggers for all levels - Be careful if you dont know how many loggers are registered
    static void flushAll(void);
    /// @brief Adds logging flag used internally.
    static inline void addFlag(LoggingFlag flag) {
      ELPP->addFlag(flag);
    }
    /// @brief Removes logging flag used internally.
    static inline void removeFlag(LoggingFlag flag) {
      ELPP->removeFlag(flag);
    }
    /// @brief Determines whether or not certain flag is active
    static inline bool hasFlag(LoggingFlag flag) {
      return ELPP->hasFlag(flag);
    }
    /// @brief Adds flag and removes it when scope goes out
    class ScopedAddFlag {
     public:
      ScopedAddFlag(LoggingFlag flag) : m_flag(flag) {
        Loggers::addFlag(m_flag);
      }
      ~ScopedAddFlag(void) {
        Loggers::removeFlag(m_flag);
      }
     private:
      LoggingFlag m_flag;
    };
    /// @brief Removes flag and add it when scope goes out
    class ScopedRemoveFlag {
     public:
      ScopedRemoveFlag(LoggingFlag flag) : m_flag(flag) {
        Loggers::removeFlag(m_flag);
      }
      ~ScopedRemoveFlag(void) {
        Loggers::addFlag(m_flag);
      }
     private:
      LoggingFlag m_flag;
    };
    /// @brief Sets hierarchy for logging. Needs to enable logging flag (HierarchicalLogging)
    static void setLoggingLevel(Level level) {
      ELPP->setLoggingLevel(level);
    }
    /// @brief Sets verbose level on the fly
    static void setVerboseLevel(base::type::VerboseLevel level);
    /// @brief Gets current verbose level
    static base::type::VerboseLevel verboseLevel(void);
    /// @brief Sets vmodules as specified (on the fly)
    static void setVModules(const char* modules);
    /// @brief Clears vmodules
    static void clearVModules(void);
  };
  class VersionInfo : base::StaticClass {
   public:
    /// @brief Current version number
    static const std::string version(void);
  
    /// @brief Release date of current version
    static const std::string releaseDate(void);
  };
  }  // namespace el
  #undef VLOG_IS_ON
  /// @brief Determines whether verbose logging is on for specified level current file.
  #define VLOG_IS_ON(verboseLevel) (ELPP->vRegistry()->allowed(verboseLevel, __FILE__))
  #undef TIMED_BLOCK
  #undef TIMED_SCOPE
  #undef TIMED_SCOPE_IF
  #undef TIMED_FUNC
  #undef TIMED_FUNC_IF
  #undef ELPP_MIN_UNIT
  #if defined(ELPP_PERFORMANCE_MICROSECONDS)
  #  define ELPP_MIN_UNIT el::base::TimestampUnit::Microsecond
  #else
  #  define ELPP_MIN_UNIT el::base::TimestampUnit::Millisecond
  #endif  // (defined(ELPP_PERFORMANCE_MICROSECONDS))
  /// @brief Performance tracked scope. Performance gets written when goes out of scope using
  ///        'performance' logger.
  ///
  /// @detail Please note in order to check the performance at a certain time you can use obj->checkpoint();
  /// @see el::base::PerformanceTracker
  /// @see el::base::PerformanceTracker::checkpoint
  // Note: Do not surround this definition with null macro because of obj instance
  #define TIMED_SCOPE_IF(obj, blockname, condition) el::base::type::PerformanceTrackerPtr obj( condition ? \
    new el::base::PerformanceTracker(blockname, ELPP_MIN_UNIT) : nullptr )
  #define TIMED_SCOPE(obj, blockname) TIMED_SCOPE_IF(obj, blockname, true)
  #define TIMED_BLOCK(obj, blockName) for (struct { int i; el::base::type::PerformanceTrackerPtr timer; } obj = { 0, \
    el::base::type::PerformanceTrackerPtr(new el::base::PerformanceTracker(blockName, ELPP_MIN_UNIT)) }; obj.i < 1; ++obj.i)
  /// @brief Performance tracked function. Performance gets written when goes out of scope using
  ///        'performance' logger.
  ///
  /// @detail Please note in order to check the performance at a certain time you can use obj->checkpoint();
  /// @see el::base::PerformanceTracker
  /// @see el::base::PerformanceTracker::checkpoint
  #define TIMED_FUNC_IF(obj,condition) TIMED_SCOPE_IF(obj, ELPP_FUNC, condition)
  #define TIMED_FUNC(obj) TIMED_SCOPE(obj, ELPP_FUNC)
  #undef PERFORMANCE_CHECKPOINT
  #undef PERFORMANCE_CHECKPOINT_WITH_ID
  #define PERFORMANCE_CHECKPOINT(obj) obj->checkpoint(std::string(), __FILE__, __LINE__, ELPP_FUNC)
  #define PERFORMANCE_CHECKPOINT_WITH_ID(obj, id) obj->checkpoint(id, __FILE__, __LINE__, ELPP_FUNC)
  #undef ELPP_COUNTER
  #undef ELPP_COUNTER_POS
  /// @brief Gets hit counter for file/line
  #define ELPP_COUNTER (ELPP->hitCounters()->getCounter(__FILE__, __LINE__))
  /// @brief Gets hit counter position for file/line, -1 if not registered yet
  #define ELPP_COUNTER_POS (ELPP_COUNTER == nullptr ? -1 : ELPP_COUNTER->hitCounts())
  // Undef levels to support LOG(LEVEL)
  #undef INFO
  #undef WARNING
  #undef DEBUG
  #undef ERROR
  #undef FATAL
  #undef TRACE
  #undef VERBOSE
  // Undef existing
  #undef CINFO
  #undef CWARNING
  #undef CDEBUG
  #undef CFATAL
  #undef CERROR
  #undef CTRACE
  #undef CVERBOSE
  #undef CINFO_IF
  #undef CWARNING_IF
  #undef CDEBUG_IF
  #undef CERROR_IF
  #undef CFATAL_IF
  #undef CTRACE_IF
  #undef CVERBOSE_IF
  #undef CINFO_EVERY_N
  #undef CWARNING_EVERY_N
  #undef CDEBUG_EVERY_N
  #undef CERROR_EVERY_N
  #undef CFATAL_EVERY_N
  #undef CTRACE_EVERY_N
  #undef CVERBOSE_EVERY_N
  #undef CINFO_AFTER_N
  #undef CWARNING_AFTER_N
  #undef CDEBUG_AFTER_N
  #undef CERROR_AFTER_N
  #undef CFATAL_AFTER_N
  #undef CTRACE_AFTER_N
  #undef CVERBOSE_AFTER_N
  #undef CINFO_N_TIMES
  #undef CWARNING_N_TIMES
  #undef CDEBUG_N_TIMES
  #undef CERROR_N_TIMES
  #undef CFATAL_N_TIMES
  #undef CTRACE_N_TIMES
  #undef CVERBOSE_N_TIMES
  // Normal logs
  #if ELPP_INFO_LOG
  #  define CINFO(writer, dispatchAction, ...) ELPP_WRITE_LOG(writer, el::Level::Info, dispatchAction, __VA_ARGS__)
  #else
  #  define CINFO(writer, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_INFO_LOG
  #if ELPP_WARNING_LOG
  #  define CWARNING(writer, dispatchAction, ...) ELPP_WRITE_LOG(writer, el::Level::Warning, dispatchAction, __VA_ARGS__)
  #else
  #  define CWARNING(writer, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_WARNING_LOG
  #if ELPP_DEBUG_LOG
  #  define CDEBUG(writer, dispatchAction, ...) ELPP_WRITE_LOG(writer, el::Level::Debug, dispatchAction, __VA_ARGS__)
  #else
  #  define CDEBUG(writer, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_DEBUG_LOG
  #if ELPP_ERROR_LOG
  #  define CERROR(writer, dispatchAction, ...) ELPP_WRITE_LOG(writer, el::Level::Error, dispatchAction, __VA_ARGS__)
  #else
  #  define CERROR(writer, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_ERROR_LOG
  #if ELPP_FATAL_LOG
  #  define CFATAL(writer, dispatchAction, ...) ELPP_WRITE_LOG(writer, el::Level::Fatal, dispatchAction, __VA_ARGS__)
  #else
  #  define CFATAL(writer, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_FATAL_LOG
  #if ELPP_TRACE_LOG
  #  define CTRACE(writer, dispatchAction, ...) ELPP_WRITE_LOG(writer, el::Level::Trace, dispatchAction, __VA_ARGS__)
  #else
  #  define CTRACE(writer, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_TRACE_LOG
  #if ELPP_VERBOSE_LOG
  #  define CVERBOSE(writer, vlevel, dispatchAction, ...) if (VLOG_IS_ON(vlevel)) writer(\
  el::Level::Verbose, __FILE__, __LINE__, ELPP_FUNC, dispatchAction, vlevel).construct(el_getVALength(__VA_ARGS__), __VA_ARGS__)
  #else
  #  define CVERBOSE(writer, vlevel, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_VERBOSE_LOG
  // Conditional logs
  #if ELPP_INFO_LOG
  #  define CINFO_IF(writer, condition_, dispatchAction, ...) \
  ELPP_WRITE_LOG_IF(writer, (condition_), el::Level::Info, dispatchAction, __VA_ARGS__)
  #else
  #  define CINFO_IF(writer, condition_, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_INFO_LOG
  #if ELPP_WARNING_LOG
  #  define CWARNING_IF(writer, condition_, dispatchAction, ...)\
  ELPP_WRITE_LOG_IF(writer, (condition_), el::Level::Warning, dispatchAction, __VA_ARGS__)
  #else
  #  define CWARNING_IF(writer, condition_, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_WARNING_LOG
  #if ELPP_DEBUG_LOG
  #  define CDEBUG_IF(writer, condition_, dispatchAction, ...)\
  ELPP_WRITE_LOG_IF(writer, (condition_), el::Level::Debug, dispatchAction, __VA_ARGS__)
  #else
  #  define CDEBUG_IF(writer, condition_, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_DEBUG_LOG
  #if ELPP_ERROR_LOG
  #  define CERROR_IF(writer, condition_, dispatchAction, ...)\
  ELPP_WRITE_LOG_IF(writer, (condition_), el::Level::Error, dispatchAction, __VA_ARGS__)
  #else
  #  define CERROR_IF(writer, condition_, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_ERROR_LOG
  #if ELPP_FATAL_LOG
  #  define CFATAL_IF(writer, condition_, dispatchAction, ...)\
  ELPP_WRITE_LOG_IF(writer, (condition_), el::Level::Fatal, dispatchAction, __VA_ARGS__)
  #else
  #  define CFATAL_IF(writer, condition_, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_FATAL_LOG
  #if ELPP_TRACE_LOG
  #  define CTRACE_IF(writer, condition_, dispatchAction, ...)\
  ELPP_WRITE_LOG_IF(writer, (condition_), el::Level::Trace, dispatchAction, __VA_ARGS__)
  #else
  #  define CTRACE_IF(writer, condition_, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_TRACE_LOG
  #if ELPP_VERBOSE_LOG
  #  define CVERBOSE_IF(writer, condition_, vlevel, dispatchAction, ...) if (VLOG_IS_ON(vlevel) && (condition_)) writer( \
  el::Level::Verbose, __FILE__, __LINE__, ELPP_FUNC, dispatchAction, vlevel).construct(el_getVALength(__VA_ARGS__), __VA_ARGS__)
  #else
  #  define CVERBOSE_IF(writer, condition_, vlevel, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_VERBOSE_LOG
  // Occasional logs
  #if ELPP_INFO_LOG
  #  define CINFO_EVERY_N(writer, occasion, dispatchAction, ...)\
  ELPP_WRITE_LOG_EVERY_N(writer, occasion, el::Level::Info, dispatchAction, __VA_ARGS__)
  #else
  #  define CINFO_EVERY_N(writer, occasion, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_INFO_LOG
  #if ELPP_WARNING_LOG
  #  define CWARNING_EVERY_N(writer, occasion, dispatchAction, ...)\
  ELPP_WRITE_LOG_EVERY_N(writer, occasion, el::Level::Warning, dispatchAction, __VA_ARGS__)
  #else
  #  define CWARNING_EVERY_N(writer, occasion, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_WARNING_LOG
  #if ELPP_DEBUG_LOG
  #  define CDEBUG_EVERY_N(writer, occasion, dispatchAction, ...)\
  ELPP_WRITE_LOG_EVERY_N(writer, occasion, el::Level::Debug, dispatchAction, __VA_ARGS__)
  #else
  #  define CDEBUG_EVERY_N(writer, occasion, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_DEBUG_LOG
  #if ELPP_ERROR_LOG
  #  define CERROR_EVERY_N(writer, occasion, dispatchAction, ...)\
  ELPP_WRITE_LOG_EVERY_N(writer, occasion, el::Level::Error, dispatchAction, __VA_ARGS__)
  #else
  #  define CERROR_EVERY_N(writer, occasion, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_ERROR_LOG
  #if ELPP_FATAL_LOG
  #  define CFATAL_EVERY_N(writer, occasion, dispatchAction, ...)\
  ELPP_WRITE_LOG_EVERY_N(writer, occasion, el::Level::Fatal, dispatchAction, __VA_ARGS__)
  #else
  #  define CFATAL_EVERY_N(writer, occasion, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_FATAL_LOG
  #if ELPP_TRACE_LOG
  #  define CTRACE_EVERY_N(writer, occasion, dispatchAction, ...)\
  ELPP_WRITE_LOG_EVERY_N(writer, occasion, el::Level::Trace, dispatchAction, __VA_ARGS__)
  #else
  #  define CTRACE_EVERY_N(writer, occasion, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_TRACE_LOG
  #if ELPP_VERBOSE_LOG
  #  define CVERBOSE_EVERY_N(writer, occasion, vlevel, dispatchAction, ...)\
  CVERBOSE_IF(writer, ELPP->validateEveryNCounter(__FILE__, __LINE__, occasion), vlevel, dispatchAction, __VA_ARGS__)
  #else
  #  define CVERBOSE_EVERY_N(writer, occasion, vlevel, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_VERBOSE_LOG
  // After N logs
  #if ELPP_INFO_LOG
  #  define CINFO_AFTER_N(writer, n, dispatchAction, ...)\
  ELPP_WRITE_LOG_AFTER_N(writer, n, el::Level::Info, dispatchAction, __VA_ARGS__)
  #else
  #  define CINFO_AFTER_N(writer, n, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_INFO_LOG
  #if ELPP_WARNING_LOG
  #  define CWARNING_AFTER_N(writer, n, dispatchAction, ...)\
  ELPP_WRITE_LOG_AFTER_N(writer, n, el::Level::Warning, dispatchAction, __VA_ARGS__)
  #else
  #  define CWARNING_AFTER_N(writer, n, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_WARNING_LOG
  #if ELPP_DEBUG_LOG
  #  define CDEBUG_AFTER_N(writer, n, dispatchAction, ...)\
  ELPP_WRITE_LOG_AFTER_N(writer, n, el::Level::Debug, dispatchAction, __VA_ARGS__)
  #else
  #  define CDEBUG_AFTER_N(writer, n, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_DEBUG_LOG
  #if ELPP_ERROR_LOG
  #  define CERROR_AFTER_N(writer, n, dispatchAction, ...)\
  ELPP_WRITE_LOG_AFTER_N(writer, n, el::Level::Error, dispatchAction, __VA_ARGS__)
  #else
  #  define CERROR_AFTER_N(writer, n, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_ERROR_LOG
  #if ELPP_FATAL_LOG
  #  define CFATAL_AFTER_N(writer, n, dispatchAction, ...)\
  ELPP_WRITE_LOG_AFTER_N(writer, n, el::Level::Fatal, dispatchAction, __VA_ARGS__)
  #else
  #  define CFATAL_AFTER_N(writer, n, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_FATAL_LOG
  #if ELPP_TRACE_LOG
  #  define CTRACE_AFTER_N(writer, n, dispatchAction, ...)\
  ELPP_WRITE_LOG_AFTER_N(writer, n, el::Level::Trace, dispatchAction, __VA_ARGS__)
  #else
  #  define CTRACE_AFTER_N(writer, n, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_TRACE_LOG
  #if ELPP_VERBOSE_LOG
  #  define CVERBOSE_AFTER_N(writer, n, vlevel, dispatchAction, ...)\
  CVERBOSE_IF(writer, ELPP->validateAfterNCounter(__FILE__, __LINE__, n), vlevel, dispatchAction, __VA_ARGS__)
  #else
  #  define CVERBOSE_AFTER_N(writer, n, vlevel, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_VERBOSE_LOG
  // N Times logs
  #if ELPP_INFO_LOG
  #  define CINFO_N_TIMES(writer, n, dispatchAction, ...)\
  ELPP_WRITE_LOG_N_TIMES(writer, n, el::Level::Info, dispatchAction, __VA_ARGS__)
  #else
  #  define CINFO_N_TIMES(writer, n, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_INFO_LOG
  #if ELPP_WARNING_LOG
  #  define CWARNING_N_TIMES(writer, n, dispatchAction, ...)\
  ELPP_WRITE_LOG_N_TIMES(writer, n, el::Level::Warning, dispatchAction, __VA_ARGS__)
  #else
  #  define CWARNING_N_TIMES(writer, n, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_WARNING_LOG
  #if ELPP_DEBUG_LOG
  #  define CDEBUG_N_TIMES(writer, n, dispatchAction, ...)\
  ELPP_WRITE_LOG_N_TIMES(writer, n, el::Level::Debug, dispatchAction, __VA_ARGS__)
  #else
  #  define CDEBUG_N_TIMES(writer, n, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_DEBUG_LOG
  #if ELPP_ERROR_LOG
  #  define CERROR_N_TIMES(writer, n, dispatchAction, ...)\
  ELPP_WRITE_LOG_N_TIMES(writer, n, el::Level::Error, dispatchAction, __VA_ARGS__)
  #else
  #  define CERROR_N_TIMES(writer, n, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_ERROR_LOG
  #if ELPP_FATAL_LOG
  #  define CFATAL_N_TIMES(writer, n, dispatchAction, ...)\
  ELPP_WRITE_LOG_N_TIMES(writer, n, el::Level::Fatal, dispatchAction, __VA_ARGS__)
  #else
  #  define CFATAL_N_TIMES(writer, n, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_FATAL_LOG
  #if ELPP_TRACE_LOG
  #  define CTRACE_N_TIMES(writer, n, dispatchAction, ...)\
  ELPP_WRITE_LOG_N_TIMES(writer, n, el::Level::Trace, dispatchAction, __VA_ARGS__)
  #else
  #  define CTRACE_N_TIMES(writer, n, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_TRACE_LOG
  #if ELPP_VERBOSE_LOG
  #  define CVERBOSE_N_TIMES(writer, n, vlevel, dispatchAction, ...)\
  CVERBOSE_IF(writer, ELPP->validateNTimesCounter(__FILE__, __LINE__, n), vlevel, dispatchAction, __VA_ARGS__)
  #else
  #  define CVERBOSE_N_TIMES(writer, n, vlevel, dispatchAction, ...) el::base::NullWriter()
  #endif  // ELPP_VERBOSE_LOG
  //
  // Custom Loggers - Requires (level, dispatchAction, loggerId/s)
  //
  // undef existing
  #undef CLOG
  #undef CLOG_VERBOSE
  #undef CVLOG
  #undef CLOG_IF
  #undef CLOG_VERBOSE_IF
  #undef CVLOG_IF
  #undef CLOG_EVERY_N
  #undef CVLOG_EVERY_N
  #undef CLOG_AFTER_N
  #undef CVLOG_AFTER_N
  #undef CLOG_N_TIMES
  #undef CVLOG_N_TIMES
  // Normal logs
  #define CLOG(LEVEL, ...)\
  C##LEVEL(el::base::Writer, el::base::DispatchAction::NormalLog, __VA_ARGS__)
  #define CVLOG(vlevel, ...) CVERBOSE(el::base::Writer, vlevel, el::base::DispatchAction::NormalLog, __VA_ARGS__)
  // Conditional logs
  #define CLOG_IF(condition, LEVEL, ...)\
  C##LEVEL##_IF(el::base::Writer, condition, el::base::DispatchAction::NormalLog, __VA_ARGS__)
  #define CVLOG_IF(condition, vlevel, ...)\
  CVERBOSE_IF(el::base::Writer, condition, vlevel, el::base::DispatchAction::NormalLog, __VA_ARGS__)
  // Hit counts based logs
  #define CLOG_EVERY_N(n, LEVEL, ...)\
  C##LEVEL##_EVERY_N(el::base::Writer, n, el::base::DispatchAction::NormalLog, __VA_ARGS__)
  #define CVLOG_EVERY_N(n, vlevel, ...)\
  CVERBOSE_EVERY_N(el::base::Writer, n, vlevel, el::base::DispatchAction::NormalLog, __VA_ARGS__)
  #define CLOG_AFTER_N(n, LEVEL, ...)\
  C##LEVEL##_AFTER_N(el::base::Writer, n, el::base::DispatchAction::NormalLog, __VA_ARGS__)
  #define CVLOG_AFTER_N(n, vlevel, ...)\
  CVERBOSE_AFTER_N(el::base::Writer, n, vlevel, el::base::DispatchAction::NormalLog, __VA_ARGS__)
  #define CLOG_N_TIMES(n, LEVEL, ...)\
  C##LEVEL##_N_TIMES(el::base::Writer, n, el::base::DispatchAction::NormalLog, __VA_ARGS__)
  #define CVLOG_N_TIMES(n, vlevel, ...)\
  CVERBOSE_N_TIMES(el::base::Writer, n, vlevel, el::base::DispatchAction::NormalLog, __VA_ARGS__)
  //
  // Default Loggers macro using CLOG(), CLOG_VERBOSE() and CVLOG() macros
  //
  // undef existing
  #undef LOG
  #undef VLOG
  #undef LOG_IF
  #undef VLOG_IF
  #undef LOG_EVERY_N
  #undef VLOG_EVERY_N
  #undef LOG_AFTER_N
  #undef VLOG_AFTER_N
  #undef LOG_N_TIMES
  #undef VLOG_N_TIMES
  #undef ELPP_CURR_FILE_LOGGER_ID
  #if defined(ELPP_DEFAULT_LOGGER)
  #  define ELPP_CURR_FILE_LOGGER_ID ELPP_DEFAULT_LOGGER
  #else
  #  define ELPP_CURR_FILE_LOGGER_ID el::base::consts::kDefaultLoggerId
  #endif
  #undef ELPP_TRACE
  #define ELPP_TRACE CLOG(TRACE, ELPP_CURR_FILE_LOGGER_ID)
  // Normal logs
  #define LOG(LEVEL) CLOG(LEVEL, ELPP_CURR_FILE_LOGGER_ID)
  #define VLOG(vlevel) CVLOG(vlevel, ELPP_CURR_FILE_LOGGER_ID)
  // Conditional logs
  #define LOG_IF(condition, LEVEL) CLOG_IF(condition, LEVEL, ELPP_CURR_FILE_LOGGER_ID)
  #define VLOG_IF(condition, vlevel) CVLOG_IF(condition, vlevel, ELPP_CURR_FILE_LOGGER_ID)
  // Hit counts based logs
  #define LOG_EVERY_N(n, LEVEL) CLOG_EVERY_N(n, LEVEL, ELPP_CURR_FILE_LOGGER_ID)
  #define VLOG_EVERY_N(n, vlevel) CVLOG_EVERY_N(n, vlevel, ELPP_CURR_FILE_LOGGER_ID)
  #define LOG_AFTER_N(n, LEVEL) CLOG_AFTER_N(n, LEVEL, ELPP_CURR_FILE_LOGGER_ID)
  #define VLOG_AFTER_N(n, vlevel) CVLOG_AFTER_N(n, vlevel, ELPP_CURR_FILE_LOGGER_ID)
  #define LOG_N_TIMES(n, LEVEL) CLOG_N_TIMES(n, LEVEL, ELPP_CURR_FILE_LOGGER_ID)
  #define VLOG_N_TIMES(n, vlevel) CVLOG_N_TIMES(n, vlevel, ELPP_CURR_FILE_LOGGER_ID)
  // Generic PLOG()
  #undef CPLOG
  #undef CPLOG_IF
  #undef PLOG
  #undef PLOG_IF
  #undef DCPLOG
  #undef DCPLOG_IF
  #undef DPLOG
  #undef DPLOG_IF
  #define CPLOG(LEVEL, ...)\
  C##LEVEL(el::base::PErrorWriter, el::base::DispatchAction::NormalLog, __VA_ARGS__)
  #define CPLOG_IF(condition, LEVEL, ...)\
  C##LEVEL##_IF(el::base::PErrorWriter, condition, el::base::DispatchAction::NormalLog, __VA_ARGS__)
  #define DCPLOG(LEVEL, ...)\
  if (ELPP_DEBUG_LOG) C##LEVEL(el::base::PErrorWriter, el::base::DispatchAction::NormalLog, __VA_ARGS__)
  #define DCPLOG_IF(condition, LEVEL, ...)\
  C##LEVEL##_IF(el::base::PErrorWriter, (ELPP_DEBUG_LOG) && (condition), el::base::DispatchAction::NormalLog, __VA_ARGS__)
  #define PLOG(LEVEL) CPLOG(LEVEL, ELPP_CURR_FILE_LOGGER_ID)
  #define PLOG_IF(condition, LEVEL) CPLOG_IF(condition, LEVEL, ELPP_CURR_FILE_LOGGER_ID)
  #define DPLOG(LEVEL) DCPLOG(LEVEL, ELPP_CURR_FILE_LOGGER_ID)
  #define DPLOG_IF(condition, LEVEL) DCPLOG_IF(condition, LEVEL, ELPP_CURR_FILE_LOGGER_ID)
  // Generic SYSLOG()
  #undef CSYSLOG
  #undef CSYSLOG_IF
  #undef CSYSLOG_EVERY_N
  #undef CSYSLOG_AFTER_N
  #undef CSYSLOG_N_TIMES
  #undef SYSLOG
  #undef SYSLOG_IF
  #undef SYSLOG_EVERY_N
  #undef SYSLOG_AFTER_N
  #undef SYSLOG_N_TIMES
  #undef DCSYSLOG
  #undef DCSYSLOG_IF
  #undef DCSYSLOG_EVERY_N
  #undef DCSYSLOG_AFTER_N
  #undef DCSYSLOG_N_TIMES
  #undef DSYSLOG
  #undef DSYSLOG_IF
  #undef DSYSLOG_EVERY_N
  #undef DSYSLOG_AFTER_N
  #undef DSYSLOG_N_TIMES
  #if defined(ELPP_SYSLOG)
  #  define CSYSLOG(LEVEL, ...)\
  C##LEVEL(el::base::Writer, el::base::DispatchAction::SysLog, __VA_ARGS__)
  #  define CSYSLOG_IF(condition, LEVEL, ...)\
  C##LEVEL##_IF(el::base::Writer, condition, el::base::DispatchAction::SysLog, __VA_ARGS__)
  #  define CSYSLOG_EVERY_N(n, LEVEL, ...) C##LEVEL##_EVERY_N(el::base::Writer, n, el::base::DispatchAction::SysLog, __VA_ARGS__)
  #  define CSYSLOG_AFTER_N(n, LEVEL, ...) C##LEVEL##_AFTER_N(el::base::Writer, n, el::base::DispatchAction::SysLog, __VA_ARGS__)
  #  define CSYSLOG_N_TIMES(n, LEVEL, ...) C##LEVEL##_N_TIMES(el::base::Writer, n, el::base::DispatchAction::SysLog, __VA_ARGS__)
  #  define SYSLOG(LEVEL) CSYSLOG(LEVEL, el::base::consts::kSysLogLoggerId)
  #  define SYSLOG_IF(condition, LEVEL) CSYSLOG_IF(condition, LEVEL, el::base::consts::kSysLogLoggerId)
  #  define SYSLOG_EVERY_N(n, LEVEL) CSYSLOG_EVERY_N(n, LEVEL, el::base::consts::kSysLogLoggerId)
  #  define SYSLOG_AFTER_N(n, LEVEL) CSYSLOG_AFTER_N(n, LEVEL, el::base::consts::kSysLogLoggerId)
  #  define SYSLOG_N_TIMES(n, LEVEL) CSYSLOG_N_TIMES(n, LEVEL, el::base::consts::kSysLogLoggerId)
  #  define DCSYSLOG(LEVEL, ...) if (ELPP_DEBUG_LOG) C##LEVEL(el::base::Writer, el::base::DispatchAction::SysLog, __VA_ARGS__)
  #  define DCSYSLOG_IF(condition, LEVEL, ...)\
  C##LEVEL##_IF(el::base::Writer, (ELPP_DEBUG_LOG) && (condition), el::base::DispatchAction::SysLog, __VA_ARGS__)
  #  define DCSYSLOG_EVERY_N(n, LEVEL, ...)\
  if (ELPP_DEBUG_LOG) C##LEVEL##_EVERY_N(el::base::Writer, n, el::base::DispatchAction::SysLog, __VA_ARGS__)
  #  define DCSYSLOG_AFTER_N(n, LEVEL, ...)\
  if (ELPP_DEBUG_LOG) C##LEVEL##_AFTER_N(el::base::Writer, n, el::base::DispatchAction::SysLog, __VA_ARGS__)
  #  define DCSYSLOG_N_TIMES(n, LEVEL, ...)\
  if (ELPP_DEBUG_LOG) C##LEVEL##_EVERY_N(el::base::Writer, n, el::base::DispatchAction::SysLog, __VA_ARGS__)
  #  define DSYSLOG(LEVEL) DCSYSLOG(LEVEL, el::base::consts::kSysLogLoggerId)
  #  define DSYSLOG_IF(condition, LEVEL) DCSYSLOG_IF(condition, LEVEL, el::base::consts::kSysLogLoggerId)
  #  define DSYSLOG_EVERY_N(n, LEVEL) DCSYSLOG_EVERY_N(n, LEVEL, el::base::consts::kSysLogLoggerId)
  #  define DSYSLOG_AFTER_N(n, LEVEL) DCSYSLOG_AFTER_N(n, LEVEL, el::base::consts::kSysLogLoggerId)
  #  define DSYSLOG_N_TIMES(n, LEVEL) DCSYSLOG_N_TIMES(n, LEVEL, el::base::consts::kSysLogLoggerId)
  #else
  #  define CSYSLOG(LEVEL, ...) el::base::NullWriter()
  #  define CSYSLOG_IF(condition, LEVEL, ...) el::base::NullWriter()
  #  define CSYSLOG_EVERY_N(n, LEVEL, ...) el::base::NullWriter()
  #  define CSYSLOG_AFTER_N(n, LEVEL, ...) el::base::NullWriter()
  #  define CSYSLOG_N_TIMES(n, LEVEL, ...) el::base::NullWriter()
  #  define SYSLOG(LEVEL) el::base::NullWriter()
  #  define SYSLOG_IF(condition, LEVEL) el::base::NullWriter()
  #  define SYSLOG_EVERY_N(n, LEVEL) el::base::NullWriter()
  #  define SYSLOG_AFTER_N(n, LEVEL) el::base::NullWriter()
  #  define SYSLOG_N_TIMES(n, LEVEL) el::base::NullWriter()
  #  define DCSYSLOG(LEVEL, ...) el::base::NullWriter()
  #  define DCSYSLOG_IF(condition, LEVEL, ...) el::base::NullWriter()
  #  define DCSYSLOG_EVERY_N(n, LEVEL, ...) el::base::NullWriter()
  #  define DCSYSLOG_AFTER_N(n, LEVEL, ...) el::base::NullWriter()
  #  define DCSYSLOG_N_TIMES(n, LEVEL, ...) el::base::NullWriter()
  #  define DSYSLOG(LEVEL) el::base::NullWriter()
  #  define DSYSLOG_IF(condition, LEVEL) el::base::NullWriter()
  #  define DSYSLOG_EVERY_N(n, LEVEL) el::base::NullWriter()
  #  define DSYSLOG_AFTER_N(n, LEVEL) el::base::NullWriter()
  #  define DSYSLOG_N_TIMES(n, LEVEL) el::base::NullWriter()
  #endif  // defined(ELPP_SYSLOG)
  //
  // Custom Debug Only Loggers - Requires (level, loggerId/s)
  //
  // undef existing
  #undef DCLOG
  #undef DCVLOG
  #undef DCLOG_IF
  #undef DCVLOG_IF
  #undef DCLOG_EVERY_N
  #undef DCVLOG_EVERY_N
  #undef DCLOG_AFTER_N
  #undef DCVLOG_AFTER_N
  #undef DCLOG_N_TIMES
  #undef DCVLOG_N_TIMES
  // Normal logs
  #define DCLOG(LEVEL, ...) if (ELPP_DEBUG_LOG) CLOG(LEVEL, __VA_ARGS__)
  #define DCLOG_VERBOSE(vlevel, ...) if (ELPP_DEBUG_LOG) CLOG_VERBOSE(vlevel, __VA_ARGS__)
  #define DCVLOG(vlevel, ...) if (ELPP_DEBUG_LOG) CVLOG(vlevel, __VA_ARGS__)
  // Conditional logs
  #define DCLOG_IF(condition, LEVEL, ...) if (ELPP_DEBUG_LOG) CLOG_IF(condition, LEVEL, __VA_ARGS__)
  #define DCVLOG_IF(condition, vlevel, ...) if (ELPP_DEBUG_LOG) CVLOG_IF(condition, vlevel, __VA_ARGS__)
  // Hit counts based logs
  #define DCLOG_EVERY_N(n, LEVEL, ...) if (ELPP_DEBUG_LOG) CLOG_EVERY_N(n, LEVEL, __VA_ARGS__)
  #define DCVLOG_EVERY_N(n, vlevel, ...) if (ELPP_DEBUG_LOG) CVLOG_EVERY_N(n, vlevel, __VA_ARGS__)
  #define DCLOG_AFTER_N(n, LEVEL, ...) if (ELPP_DEBUG_LOG) CLOG_AFTER_N(n, LEVEL, __VA_ARGS__)
  #define DCVLOG_AFTER_N(n, vlevel, ...) if (ELPP_DEBUG_LOG) CVLOG_AFTER_N(n, vlevel, __VA_ARGS__)
  #define DCLOG_N_TIMES(n, LEVEL, ...) if (ELPP_DEBUG_LOG) CLOG_N_TIMES(n, LEVEL, __VA_ARGS__)
  #define DCVLOG_N_TIMES(n, vlevel, ...) if (ELPP_DEBUG_LOG) CVLOG_N_TIMES(n, vlevel, __VA_ARGS__)
  //
  // Default Debug Only Loggers macro using CLOG(), CLOG_VERBOSE() and CVLOG() macros
  //
  #if !defined(ELPP_NO_DEBUG_MACROS)
  // undef existing
  #undef DLOG
  #undef DVLOG
  #undef DLOG_IF
  #undef DVLOG_IF
  #undef DLOG_EVERY_N
  #undef DVLOG_EVERY_N
  #undef DLOG_AFTER_N
  #undef DVLOG_AFTER_N
  #undef DLOG_N_TIMES
  #undef DVLOG_N_TIMES
  // Normal logs
  #define DLOG(LEVEL) DCLOG(LEVEL, ELPP_CURR_FILE_LOGGER_ID)
  #define DVLOG(vlevel) DCVLOG(vlevel, ELPP_CURR_FILE_LOGGER_ID)
  // Conditional logs
  #define DLOG_IF(condition, LEVEL) DCLOG_IF(condition, LEVEL, ELPP_CURR_FILE_LOGGER_ID)
  #define DVLOG_IF(condition, vlevel) DCVLOG_IF(condition, vlevel, ELPP_CURR_FILE_LOGGER_ID)
  // Hit counts based logs
  #define DLOG_EVERY_N(n, LEVEL) DCLOG_EVERY_N(n, LEVEL, ELPP_CURR_FILE_LOGGER_ID)
  #define DVLOG_EVERY_N(n, vlevel) DCVLOG_EVERY_N(n, vlevel, ELPP_CURR_FILE_LOGGER_ID)
  #define DLOG_AFTER_N(n, LEVEL) DCLOG_AFTER_N(n, LEVEL, ELPP_CURR_FILE_LOGGER_ID)
  #define DVLOG_AFTER_N(n, vlevel) DCVLOG_AFTER_N(n, vlevel, ELPP_CURR_FILE_LOGGER_ID)
  #define DLOG_N_TIMES(n, LEVEL) DCLOG_N_TIMES(n, LEVEL, ELPP_CURR_FILE_LOGGER_ID)
  #define DVLOG_N_TIMES(n, vlevel) DCVLOG_N_TIMES(n, vlevel, ELPP_CURR_FILE_LOGGER_ID)
  #endif // defined(ELPP_NO_DEBUG_MACROS)
  #if !defined(ELPP_NO_CHECK_MACROS)
  // Check macros
  #undef CCHECK
  #undef CPCHECK
  #undef CCHECK_EQ
  #undef CCHECK_NE
  #undef CCHECK_LT
  #undef CCHECK_GT
  #undef CCHECK_LE
  #undef CCHECK_GE
  #undef CCHECK_BOUNDS
  #undef CCHECK_NOTNULL
  #undef CCHECK_STRCASEEQ
  #undef CCHECK_STRCASENE
  #undef CHECK
  #undef PCHECK
  #undef CHECK_EQ
  #undef CHECK_NE
  #undef CHECK_LT
  #undef CHECK_GT
  #undef CHECK_LE
  #undef CHECK_GE
  #undef CHECK_BOUNDS
  #undef CHECK_NOTNULL
  #undef CHECK_STRCASEEQ
  #undef CHECK_STRCASENE
  #define CCHECK(condition, ...) CLOG_IF(!(condition), FATAL, __VA_ARGS__) << "Check failed: [" << #condition << "] "
  #define CPCHECK(condition, ...) CPLOG_IF(!(condition), FATAL, __VA_ARGS__) << "Check failed: [" << #condition << "] "
  #define CHECK(condition) CCHECK(condition, ELPP_CURR_FILE_LOGGER_ID)
  #define PCHECK(condition) CPCHECK(condition, ELPP_CURR_FILE_LOGGER_ID)
  #define CCHECK_EQ(a, b, ...) CCHECK(a == b, __VA_ARGS__)
  #define CCHECK_NE(a, b, ...) CCHECK(a != b, __VA_ARGS__)
  #define CCHECK_LT(a, b, ...) CCHECK(a < b, __VA_ARGS__)
  #define CCHECK_GT(a, b, ...) CCHECK(a > b, __VA_ARGS__)
  #define CCHECK_LE(a, b, ...) CCHECK(a <= b, __VA_ARGS__)
  #define CCHECK_GE(a, b, ...) CCHECK(a >= b, __VA_ARGS__)
  #define CCHECK_BOUNDS(val, min, max, ...) CCHECK(val >= min && val <= max, __VA_ARGS__)
  #define CHECK_EQ(a, b) CCHECK_EQ(a, b, ELPP_CURR_FILE_LOGGER_ID)
  #define CHECK_NE(a, b) CCHECK_NE(a, b, ELPP_CURR_FILE_LOGGER_ID)
  #define CHECK_LT(a, b) CCHECK_LT(a, b, ELPP_CURR_FILE_LOGGER_ID)
  #define CHECK_GT(a, b) CCHECK_GT(a, b, ELPP_CURR_FILE_LOGGER_ID)
  #define CHECK_LE(a, b) CCHECK_LE(a, b, ELPP_CURR_FILE_LOGGER_ID)
  #define CHECK_GE(a, b) CCHECK_GE(a, b, ELPP_CURR_FILE_LOGGER_ID)
  #define CHECK_BOUNDS(val, min, max) CCHECK_BOUNDS(val, min, max, ELPP_CURR_FILE_LOGGER_ID)
  #define CCHECK_NOTNULL(ptr, ...) CCHECK((ptr) != nullptr, __VA_ARGS__)
  #define CCHECK_STREQ(str1, str2, ...) CLOG_IF(!el::base::utils::Str::cStringEq(str1, str2), FATAL, __VA_ARGS__) \
  << "Check failed: [" << #str1 << " == " << #str2 << "] "
  #define CCHECK_STRNE(str1, str2, ...) CLOG_IF(el::base::utils::Str::cStringEq(str1, str2), FATAL, __VA_ARGS__) \
  << "Check failed: [" << #str1 << " != " << #str2 << "] "
  #define CCHECK_STRCASEEQ(str1, str2, ...) CLOG_IF(!el::base::utils::Str::cStringCaseEq(str1, str2), FATAL, __VA_ARGS__) \
  << "Check failed: [" << #str1 << " == " << #str2 << "] "
  #define CCHECK_STRCASENE(str1, str2, ...) CLOG_IF(el::base::utils::Str::cStringCaseEq(str1, str2), FATAL, __VA_ARGS__) \
  << "Check failed: [" << #str1 << " != " << #str2 << "] "
  #define CHECK_NOTNULL(ptr) CCHECK_NOTNULL((ptr), ELPP_CURR_FILE_LOGGER_ID)
  #define CHECK_STREQ(str1, str2) CCHECK_STREQ(str1, str2, ELPP_CURR_FILE_LOGGER_ID)
  #define CHECK_STRNE(str1, str2) CCHECK_STRNE(str1, str2, ELPP_CURR_FILE_LOGGER_ID)
  #define CHECK_STRCASEEQ(str1, str2) CCHECK_STRCASEEQ(str1, str2, ELPP_CURR_FILE_LOGGER_ID)
  #define CHECK_STRCASENE(str1, str2) CCHECK_STRCASENE(str1, str2, ELPP_CURR_FILE_LOGGER_ID)
  #undef DCCHECK
  #undef DCCHECK_EQ
  #undef DCCHECK_NE
  #undef DCCHECK_LT
  #undef DCCHECK_GT
  #undef DCCHECK_LE
  #undef DCCHECK_GE
  #undef DCCHECK_BOUNDS
  #undef DCCHECK_NOTNULL
  #undef DCCHECK_STRCASEEQ
  #undef DCCHECK_STRCASENE
  #undef DCPCHECK
  #undef DCHECK
  #undef DCHECK_EQ
  #undef DCHECK_NE
  #undef DCHECK_LT
  #undef DCHECK_GT
  #undef DCHECK_LE
  #undef DCHECK_GE
  #undef DCHECK_BOUNDS_
  #undef DCHECK_NOTNULL
  #undef DCHECK_STRCASEEQ
  #undef DCHECK_STRCASENE
  #undef DPCHECK
  #define DCCHECK(condition, ...) if (ELPP_DEBUG_LOG) CCHECK(condition, __VA_ARGS__)
  #define DCCHECK_EQ(a, b, ...) if (ELPP_DEBUG_LOG) CCHECK_EQ(a, b, __VA_ARGS__)
  #define DCCHECK_NE(a, b, ...) if (ELPP_DEBUG_LOG) CCHECK_NE(a, b, __VA_ARGS__)
  #define DCCHECK_LT(a, b, ...) if (ELPP_DEBUG_LOG) CCHECK_LT(a, b, __VA_ARGS__)
  #define DCCHECK_GT(a, b, ...) if (ELPP_DEBUG_LOG) CCHECK_GT(a, b, __VA_ARGS__)
  #define DCCHECK_LE(a, b, ...) if (ELPP_DEBUG_LOG) CCHECK_LE(a, b, __VA_ARGS__)
  #define DCCHECK_GE(a, b, ...) if (ELPP_DEBUG_LOG) CCHECK_GE(a, b, __VA_ARGS__)
  #define DCCHECK_BOUNDS(val, min, max, ...) if (ELPP_DEBUG_LOG) CCHECK_BOUNDS(val, min, max, __VA_ARGS__)
  #define DCCHECK_NOTNULL(ptr, ...) if (ELPP_DEBUG_LOG) CCHECK_NOTNULL((ptr), __VA_ARGS__)
  #define DCCHECK_STREQ(str1, str2, ...) if (ELPP_DEBUG_LOG) CCHECK_STREQ(str1, str2, __VA_ARGS__)
  #define DCCHECK_STRNE(str1, str2, ...) if (ELPP_DEBUG_LOG) CCHECK_STRNE(str1, str2, __VA_ARGS__)
  #define DCCHECK_STRCASEEQ(str1, str2, ...) if (ELPP_DEBUG_LOG) CCHECK_STRCASEEQ(str1, str2, __VA_ARGS__)
  #define DCCHECK_STRCASENE(str1, str2, ...) if (ELPP_DEBUG_LOG) CCHECK_STRCASENE(str1, str2, __VA_ARGS__)
  #define DCPCHECK(condition, ...) if (ELPP_DEBUG_LOG) CPCHECK(condition, __VA_ARGS__)
  #define DCHECK(condition) DCCHECK(condition, ELPP_CURR_FILE_LOGGER_ID)
  #define DCHECK_EQ(a, b) DCCHECK_EQ(a, b, ELPP_CURR_FILE_LOGGER_ID)
  #define DCHECK_NE(a, b) DCCHECK_NE(a, b, ELPP_CURR_FILE_LOGGER_ID)
  #define DCHECK_LT(a, b) DCCHECK_LT(a, b, ELPP_CURR_FILE_LOGGER_ID)
  #define DCHECK_GT(a, b) DCCHECK_GT(a, b, ELPP_CURR_FILE_LOGGER_ID)
  #define DCHECK_LE(a, b) DCCHECK_LE(a, b, ELPP_CURR_FILE_LOGGER_ID)
  #define DCHECK_GE(a, b) DCCHECK_GE(a, b, ELPP_CURR_FILE_LOGGER_ID)
  #define DCHECK_BOUNDS(val, min, max) DCCHECK_BOUNDS(val, min, max, ELPP_CURR_FILE_LOGGER_ID)
  #define DCHECK_NOTNULL(ptr) DCCHECK_NOTNULL((ptr), ELPP_CURR_FILE_LOGGER_ID)
  #define DCHECK_STREQ(str1, str2) DCCHECK_STREQ(str1, str2, ELPP_CURR_FILE_LOGGER_ID)
  #define DCHECK_STRNE(str1, str2) DCCHECK_STRNE(str1, str2, ELPP_CURR_FILE_LOGGER_ID)
  #define DCHECK_STRCASEEQ(str1, str2) DCCHECK_STRCASEEQ(str1, str2, ELPP_CURR_FILE_LOGGER_ID)
  #define DCHECK_STRCASENE(str1, str2) DCCHECK_STRCASENE(str1, str2, ELPP_CURR_FILE_LOGGER_ID)
  #define DPCHECK(condition) DCPCHECK(condition, ELPP_CURR_FILE_LOGGER_ID)
  #endif // defined(ELPP_NO_CHECK_MACROS)
  #if defined(ELPP_DISABLE_DEFAULT_CRASH_HANDLING)
  #  define ELPP_USE_DEF_CRASH_HANDLER false
  #else
  #  define ELPP_USE_DEF_CRASH_HANDLER true
  #endif  // defined(ELPP_DISABLE_DEFAULT_CRASH_HANDLING)
  #define ELPP_CRASH_HANDLER_INIT
  #define ELPP_INIT_EASYLOGGINGPP(val) \
  namespace el { \
  namespace base { \
  el::base::type::StoragePointer elStorage(val); \
  } \
  el::base::debug::CrashHandler elCrashHandler(ELPP_USE_DEF_CRASH_HANDLER); \
  }
  
  #if ELPP_ASYNC_LOGGING
  #  define INITIALIZE_EASYLOGGINGPP ELPP_INIT_EASYLOGGINGPP(new el::base::Storage(el::LogBuilderPtr(new el::base::DefaultLogBuilder()),\
  new el::base::AsyncDispatchWorker()))
  #else
  #  define INITIALIZE_EASYLOGGINGPP ELPP_INIT_EASYLOGGINGPP(new el::base::Storage(el::LogBuilderPtr(new el::base::DefaultLogBuilder())))
  #endif  // ELPP_ASYNC_LOGGING
  #define INITIALIZE_NULL_EASYLOGGINGPP \
  namespace el {\
  namespace base {\
  el::base::type::StoragePointer elStorage;\
  }\
  el::base::debug::CrashHandler elCrashHandler(ELPP_USE_DEF_CRASH_HANDLER);\
  }
  #define SHARE_EASYLOGGINGPP(initializedStorage)\
  namespace el {\
  namespace base {\
  el::base::type::StoragePointer elStorage(initializedStorage);\
  }\
  el::base::debug::CrashHandler elCrashHandler(ELPP_USE_DEF_CRASH_HANDLER);\
  }
  
  #if defined(ELPP_UNICODE)
  #  define START_EASYLOGGINGPP(argc, argv) el::Helpers::setArgs(argc, argv); std::locale::global(std::locale(""))
  #else
  #  define START_EASYLOGGINGPP(argc, argv) el::Helpers::setArgs(argc, argv)
  #endif  // defined(ELPP_UNICODE)
  #endif // EASYLOGGINGPP_H
  