3 ms·

I'm not actually familiar with Perl but viewed this out of curiosity, I had no idea you specify the version number as an import. What happens if the version num

• oalders 2y ago
  It does look like it's invoking a specific Perl version, but the version of Perl you use will be the one available in your path. When you say "use v5.40;" you are enabling a "feature bundle" that the language makes available as of that version. https://perldoc.perl.org/feature#FEATURE-BUNDLES https://perldoc.perl.org/feature#FEATURE-BUNDLES For example "use v5.40;" is shorthand for use feature qw( bitwise current_sub evalbytes fc isa module_true postderef_qq say signatures state try unicode_eval unicode_strings ); (It also does a "use strict"). It's a way to make new builtin language features easily available without turning them on by default. If you try to import a feature bundle which is greater than the version of Perl you're currently running, the code will not compile: > Perl v5.40.0 required--this is only v5.34.0, stopped at foo.pl line 1