[eCa]

In the latest Perl5 you can define signatures like normal people[1], but it has been available as an experimental feature since 5.20[2].

[1] https://perldoc.perl.org/perlsub#Signatures

[2] https://www.effectiveperlprogramming.com/2015/04/use-v5-20-s...

[nerdponx]

That's a huge quality of life improvement, and I didn't realize it's been around for so long! I will have to give this a try.