This actually works reasonably well in Perl, where you can, for example, stick "...

yellowapple on Aug 19, 2016 | parent | context | favorite | on: Curl author asks Microsoft to remove 'curl' and 'w...

This actually works reasonably well in Perl, where you can, for example, stick "use 5.22.2;" in a script and thus enable all the features of that version (and the versions before it) while keeping the features of newer versions disabled, thus ensuring backward compatibility.