Poco Logger Support for C++20's std::source_location

[andrewauclair]

Any ideas/plans to do this? Going to be a while before we can use C++20 with Poco at work. But it would be nice to use std::source_location instead of rewriting all our logger calls to use __FILE__, __FUNCTION__ (__func__) and __LINE__.

I know Poco supports C++14 and obviously won't be upgrading to C++20 for a very long time. There are several feature test macros for checking the includes and for checking the actual feature. I'll paste them below.

#if __has_include(<source_location>)
#include <source_location>
#elif __has_include(<experimental/source_location>)
#include <experimental/source_location>
using std::experimental::source_location;
#endif

#ifdef __cpp_lib_source_location
	void fatal(const std::string& msg, std::source_location location = std::source_location::current());
#endif

#ifdef __cpp_lib_source_location
inline void Logger::fatal(const std::string& msg, std::source_location location)
{
	log(msg, Message::PRIO_FATAL, location.file_name(), location.line());
}
#endif