title: C++ Extensions for Library Fundamentals, ISO/IEC TS 19568:2017
body: <p>I read about new C++ features, especially those suited to replace pre-processor code in modern C++, like <code>std::experimental::source_location::current()</code>.</p>
  
  <p>I found that this function (among others) is part of "Version 2 of the C++ Extensions for Library Fundamentals, ISO/IEC TS 19568:2017".</p>
  
  <p>I never heard about that library before.</p>
  
  <p>Which compilers do support it? Is there a way to find out if specific features actually will be part of a future C++ standard? How stable are the implementations of that extension? Is it a good idea to use it today for productive code? </p>