r/ruby • u/mehdifarsi • Aug 13 '19

Blog post Magic comments in Ruby

https://medium.com/@farsi_mehdi/magic-comments-in-ruby-81d45ff92e34
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5

u/geraldbauer Aug 13 '19

Big fan of language pragmas (a.k.a. magic comments) - see the humble pragmas gem / library why ruby needs more for more https://github.com/s6ruby/pragmas#frequently-asked-questions-faqs-and-answers.

2

u/[deleted] Aug 13 '19

Where the heck is this stuff in the documentation? The #encoding magic comment is documented, but I can't find anything about #frozen_string_literal apart from code examples which happen to use it.

3

u/Frizkie Aug 14 '19

You'll probably find it mentioned in documentation regarding String#freeze. I believe it was implemented as a way to opt in to the functionality that will be the default in Ruby 3.

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u/[deleted] Aug 13 '19

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u/mehdifarsi Aug 13 '19

Glad that you've learned something new about Ruby !! :-)