Perl 7 is going to be Perl 5.32, mostly

Re:Perl 7 is going to be Perl 5.32, mostly by lizmat on Wednesday June 24, 2020 @03:37PM (#23632857)

Perl does not have grammars (at least, not built-in). Raku (formerly known as Perl 6) does: https://docs.raku.org/language/grammar_tutorial

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Re:Perl 7 is going to be Perl 5.32, mostly by blindluke on Thursday June 25, 2020 @03:21AM (#23637772)

> Perl does not have grammars (at least, not built-in).

That's not true since v5.10 (2007). Here's a sample that matches a subset of LaTeX markup:

  $matcher = qr{
      (?&File)
   
      (?(DEFINE)
          (?<File>     (?&Element)* )
   
          (?<Element>  \s* (?&Command)
                    |  \s* (?&Literal)
          )
   
          (?<Command>  \\ \s* (?&Literal) \s* (?&Options)? \s* (?&Args)? )
   
          (?<Options>  \[ \s* (?:(?&Option) (?:\s*,\s* (?&Option) )*)? \s* \])
   
          (?<Args>     \{ \s* (?&Element)* \s* \}  )
   
          (?<Option>   \s* [^][\$&%#_{}~^\s,]+     )
   
          (?<Literal>  \s* [^][\$&%#_{}~^\s]+      )
      )
  }xms

It's nowhere near as advanced as Raku grammars (not much is), but it's there, and it's built-in.

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