easylogging++.h

//
//  Bismillah ar-Rahmaan ar-Raheem
//
//  Easylogging++ v9.95.3
//  Single-header only, cross-platform logging library for C++ applications
//
//  Copyright (c) 2017 muflihun.com
//
//  This library is released under the MIT Licence.
//  http://labs.muflihun.com/easyloggingpp/licence.php
//
//  https://github.com/muflihun/easyloggingpp
//  https://muflihun.github.io/easyloggingpp
//  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
// Unix
#if ((ELPP_OS_LINUX || ELPP_OS_MAC || ELPP_OS_FREEBSD || ELPP_OS_NETBSD || ELPP_OS_SOLARIS || ELPP_OS_AIX) && (!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)
#    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
#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 <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_MAP)
#      include <unordered_map>
#  endif  // defined(ELPP_LOG_UNORDERED_MAP)
#  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
	};
	/// @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 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
	};
	namespace base {
		/// @brief Namespace containing constants used internally.
		namespace consts {
#if defined(__GNUC__) && !defined(__clang__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-variable"
#endif
			// Level log values - These are values that are replaced in place of %level format specifier
			// Extra spaces after format specifiers are only for readability purposes in log files
			static const base::type::char_t* kInfoLevelLogValue = ELPP_LITERAL("INFO");
			static const base::type::char_t* kDebugLevelLogValue = ELPP_LITERAL("DEBUG");
			static const base::type::char_t* kWarningLevelLogValue = ELPP_LITERAL("WARNING");
			static const base::type::char_t* kErrorLevelLogValue = ELPP_LITERAL("ERROR");
			static const base::type::char_t* kFatalLevelLogValue = ELPP_LITERAL("FATAL");
			static const base::type::char_t* kVerboseLevelLogValue =
				ELPP_LITERAL("VERBOSE"); // will become VERBOSE-x where x = verbose level
			static const base::type::char_t* kTraceLevelLogValue = ELPP_LITERAL("TRACE");
			static const base::type::char_t* kInfoLevelShortLogValue = ELPP_LITERAL("I");
			static const base::type::char_t* kDebugLevelShortLogValue = ELPP_LITERAL("D");
			static const base::type::char_t* kWarningLevelShortLogValue = ELPP_LITERAL("W");
			static const base::type::char_t* kErrorLevelShortLogValue = ELPP_LITERAL("E");
			static const base::type::char_t* kFatalLevelShortLogValue = ELPP_LITERAL("F");
			static const base::type::char_t* kVerboseLevelShortLogValue = ELPP_LITERAL("V");
			static const base::type::char_t* kTraceLevelShortLogValue = ELPP_LITERAL("T");
			// Format specifiers - These are used to define log format
			static const base::type::char_t* kAppNameFormatSpecifier = ELPP_LITERAL("%app");
			static const base::type::char_t* kLoggerIdFormatSpecifier = ELPP_LITERAL("%logger");
			static const base::type::char_t* kThreadIdFormatSpecifier = ELPP_LITERAL("%thread");
			static const base::type::char_t* kSeverityLevelFormatSpecifier = ELPP_LITERAL("%level");
			static const base::type::char_t* kSeverityLevelShortFormatSpecifier = ELPP_LITERAL("%levshort");
			static const base::type::char_t* kDateTimeFormatSpecifier = ELPP_LITERAL("%datetime");
			static const base::type::char_t* kLogFileFormatSpecifier = ELPP_LITERAL("%file");
			static const base::type::char_t* kLogFileBaseFormatSpecifier = ELPP_LITERAL("%fbase");
			static const base::type::char_t* kLogLineFormatSpecifier = ELPP_LITERAL("%line");
			static const base::type::char_t* kLogLocationFormatSpecifier = ELPP_LITERAL("%loc");
			static const base::type::char_t* kLogFunctionFormatSpecifier = ELPP_LITERAL("%func");
			static const base::type::char_t* kCurrentUserFormatSpecifier = ELPP_LITERAL("%user");
			static const base::type::char_t* kCurrentHostFormatSpecifier = ELPP_LITERAL("%host");
			static const base::type::char_t* kMessageFormatSpecifier = ELPP_LITERAL("%msg");
			static const base::type::char_t* kVerboseLevelFormatSpecifier = ELPP_LITERAL("%vlevel");
			static const char* kDateTimeFormatSpecifierForFilename = "%datetime";
			// Date/time
			static const char* kDays[7] = { "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" };
			static const char* kDaysAbbrev[7] = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" };
			static const char* kMonths[12] = { "January", "February", "March", "Apri", "May", "June", "July", "August",
				"September", "October", "November", "December"
			};
			static const char* kMonthsAbbrev[12] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
			static const char* kDefaultDateTimeFormat = "%Y-%M-%d %H:%m:%s,%g";
			static const char* kDefaultDateTimeFormatInFilename = "%Y-%M-%d_%H-%m";
			static const int kYearBase = 1900;
			static const char* kAm = "AM";
			static const char* kPm = "PM";
			// Miscellaneous constants
#ifdef ELPP_DEFAULT_LOGGER
			static const char* kDefaultLoggerId = ELPP_DEFAULT_LOGGER;
#else
			static const char* kDefaultLoggerId = "default";
#endif
#ifdef ELPP_DEFAULT_PERFORMANCE_LOGGER
			static const char* kPerformanceLoggerId = ELPP_DEFAULT_PERFORMANCE_LOGGER;
#else
			static const char* kPerformanceLoggerId = "performance";
#endif
#if defined(ELPP_SYSLOG)
			static const char* kSysLogLoggerId = "syslog";
#endif  // defined(ELPP_SYSLOG)
			static const char* kNullPointer = "nullptr";
			static const char  kFormatSpecifierChar = '%';
#if ELPP_VARIADIC_TEMPLATES_SUPPORTED
			static const char  kFormatSpecifierCharValue = 'v';
#endif  // ELPP_VARIADIC_TEMPLATES_SUPPORTED
			static const unsigned int kMaxLogPerContainer = 100;
			static const unsigned int kMaxLogPerCounter = 100000;
			static const unsigned int kDefaultSubsecondPrecision = 3;
			static const base::type::VerboseLevel kMaxVerboseLevel = 9;
			static const char* kUnknownUser = "user";
			static const char* kUnknownHost = "unknown-host";
#if defined(ELPP_DEFAULT_LOG_FILE)
			static const char* kDefaultLogFile = ELPP_DEFAULT_LOG_FILE;
#else
#  if ELPP_OS_UNIX
#      if ELPP_OS_ANDROID
			static const char* kDefaultLogFile = "Log/BitTrexPlugin.log";
#      else
			static const char* kDefaultLogFile = "Log/BitTrexPlugin.log";
#      endif  // ELPP_OS_ANDROID
#  elif ELPP_OS_WINDOWS
			static const char* kDefaultLogFile = "Log\\BitTrexPlugin.log";
#  endif  // ELPP_OS_UNIX
#endif  // defined(ELPP_DEFAULT_LOG_FILE)
#if !defined(ELPP_DISABLE_LOG_FILE_FROM_ARG)
			static const char* kDefaultLogFileParam = "--default-log-file";
#endif  // !defined(ELPP_DISABLE_LOG_FILE_FROM_ARG)
#if defined(ELPP_LOGGING_FLAGS_FROM_ARG)
			static const char* kLoggingFlagsParam = "--logging-flags";
#endif  // defined(ELPP_LOGGING_FLAGS_FROM_ARG)
#if ELPP_OS_WINDOWS
			static const char* kFilePathSeperator = "\\";
#else
			static const char* kFilePathSeperator = "/";
#endif  // ELPP_OS_WINDOWS
			static const char* kValidLoggerIdSymbols =
				"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-._";
			static const char* kConfigurationComment = "##";
			static const char* kConfigurationLevel = "*";
			static const char* kConfigurationLoggerId = "--";
			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]);
#if defined(__GNUC__) && !defined(__clang__)
#pragma GCC diagnostic pop
#endif
		}  // 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);


			private:
				static struct ::tm* buildTimeInfo(struct timeval* currTime, struct ::tm* timeInfo);
				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::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::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::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::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::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::map<std::string, TPtr>* mapT) {
					typename std::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::map<std::string, FileStreamPtr> LogStreamsReferenceMap;
		/// @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, base::LogStreamsReferenceMap* logStreamsReference);

			TypedConfigurations(const TypedConfigurations& other);

			virtual ~TypedConfigurations(void) {
			}

			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);
			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);
			std::size_t maxLogFileSize(Level level);
			std::size_t logFlushThreshold(Level level);

		private:
			Configurations* m_configurations;
			std::map<Level, bool> m_enabledMap;
			std::map<Level, bool> m_toFileMap;
			std::map<Level, std::string> m_filenameMap;
			std::map<Level, bool> m_toStandardOutputMap;
			std::map<Level, base::LogFormat> m_logFormatMap;
			std::map<Level, base::SubsecondPrecision> m_subsecondPrecisionMap;
			std::map<Level, bool> m_performanceTrackingMap;
			std::map<Level, base::FileStreamPtr> m_fileStreamMap;
			std::map<Level, std::size_t> m_maxLogFileSizeMap;
			std::map<Level, std::size_t> m_logFlushThresholdMap;
			base::LogStreamsReferenceMap* m_logStreamsReference;

			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::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::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::map<Level, Conf_T>* confMap, const char* confName) {
				ELPP_UNUSED(confName);
				typename std::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::map<Level, Conf_T>* confMap, const char* confName) {
				ELPP_UNUSED(confName);
				typename std::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::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::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;
		}
	private:
		LogMessage* m_logMessage;
		base::DispatchAction m_dispatchAction;
		friend class base::LogDispatcher;

		inline void setLogMessage(LogMessage* logMessage) {
			m_logMessage = logMessage;
		}
		inline void setDispatchAction(base::DispatchAction dispatchAction) {
			m_dispatchAction = dispatchAction;
		}
	};
	class LogDispatchCallback : public Callback<LogDispatchData> {
	private:
		friend class base::LogDispatcher;
	};
	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::LogStreamsReferenceMap* logStreamsReference);
		Logger(const std::string& id, const Configurations& configurations, base::LogStreamsReferenceMap* 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, base::type::fstream_t* 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::map<Level, unsigned int> m_unflushedCount;
		base::LogStreamsReferenceMap* m_logStreamsReference;
		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 base::LogStreamsReferenceMap* 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::LogStreamsReferenceMap m_logStreamsReference;
			std::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::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::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()) {
		}
		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;
			}

			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(lock());
				m_threadNames[base::threading::getCurrentThreadId()] = name;
			}

			inline std::string getThreadName(const std::string& threadId) {
				std::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::map<std::string, base::type::LogDispatchCallbackPtr> m_logDispatchCallbacks;
			std::map<std::string, base::type::PerformanceTrackingCallbackPtr> m_performanceTrackingCallbacks;
			std::map<std::string, std::string> m_threadNames;
			std::vector<CustomFormatSpecifier> m_customFormatSpecifiers;
			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);
		};
#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_continueRunningMutex);
				m_continueRunning = value;
			}

			bool continueRunning(void) const {
				return m_continueRunning;
			}
		private:
			std::condition_variable cv;
			bool m_continueRunning;
			base::threading::Mutex m_continueRunningMutex;
		};
#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(std::move(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_level(level), m_file(file), m_line(line), m_func(func), m_verboseLevel(verboseLevel),
				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:
			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 char* loc, const char* demang, const char* hex, const char* addr);
					StackTraceEntry(std::size_t index, char* 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 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 (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::LogStreamsReferenceMap* 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 attempeted 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