ordered logging utility

ordered_logging.cpp

#include <iostream>
#include <string>
#include <initializer_list>


class Log: public std::ostringstream
{
public:
  Log() = default;

  ~Log()
  {

    std::lock_guard<std::mutex> guard(_mutexPrint);
        std::cout << this->str();

  }

private:

  static std::mutex _mutexPrint;

};

std::mutex Log::_mutexPrint{};

template <typename T>
void func(T t)
{
  Log{} << t  ;
}

#ifdef LOGGING

template<typename T, typename... Args>
void func(T t, Args... args) // recursive variadic function
{
  Log{} << t  ;

  func(args...) ;
}
#else
template<typename T, typename... Args>
void func(T t, Args... args) // recursive variadic function
{
  return;
}
#endif

#ifdef LOGGING
template <class T>
void func2( std::initializer_list<T> list )
{
  for( auto elem : list )
  {
    Log{} << elem;
  }
}
#endif