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use syntax


  Maintainer: Simon Cozens <simon@brecon.co.uk>
  Date: 28 Sep 2000
  Mailing List: perl6-language@perl.org
  Number: 329
  Version: 1
  Status: Developing


A pragma to modify the syntax of Perl 6 at run time. Oh yes.


So, maybe the Perl 6 crack pipe finally got around to me, but it seems to me that if we've got a parser that we can modify and add hooks to in Perl space (see RFC 314) then we can alter Perl's syntax using pragmata.

Combining this with source filters means that we can arrange for the line

    use syntax "perl5";

to enable legacy Perl programs to run under Perl 6.

I briefly considered

        use syntax "python";

and nearly lost my lunch.

Seriously, though, I think if we have a flexible parser that we can modify in Perl space, interpreting legacy versions of Perl or inferior languages could quite definitely become possible.


First, implement 314. Then construct grammars for what we want to parse, and ensure that the parser is flexible enough to allow them as alternate grammars.


RFC 314