C++ definitions for logging lines, by using a variadic macro (Log) and variadic templates (Log2 and Log3)

variadic-log.h

void Log3()
{
   cout << endl ;
}

template<typename T, typename ...Tipos> 
void Log3( const T & first, const Tipos & ...parametros )
{
   using namespace std ;
   cout << first << " ";
   Log3(parametros...);
}

template<typename ...Tipos> 
void Log2( const std::string & file, const std::string & funct, const int line_num, 
           const Tipos & ...parametros )
{
   using namespace std ;
   cout << "file: " << file << ", function: " << funct << ", line: " << line_num << " --> " ; 
   Log3<Tipos...>(parametros...);
}

#define Log( ... )  Log2( __FILE__, __PRETTY_FUNCTION__, __LINE__, __VA_ARGS__ )