Re^4: poll ideas quest 2021

Guacamole

I think it's noteworthy that the goal of that module is not to be able to parse all of Perl, just the subset of "standard Perl". So for example, it doesn't allow -bareword, stringy eval, unquoted hash keys on the left of the fat comma, and several more, but not because of technical limitations of the parser, but for policy reasons. I've suggested that the technical and policy based restrictions be disentangled to allow for easier porting of codebases to a parseable Perl, but I'm currently not sure when or if that might happen.

Of course also noteworthy is RPerl, which I believe implements its own parser.

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Re^5: poll ideas quest 2021 by hippo (Bishop) on Aug 18, 2021 at 08:32 UTC
unquoted hash keys on the left of the fat comma That will rule out a lot of the Perl I read and pretty much all of the Perl I write. If that's a policy restriction rather than a technical one then I am at a loss to understand the reasoning behind it. 🦛	[reply]
Re^6: poll ideas quest 2021 by haukex (Archbishop) on Aug 18, 2021 at 08:42 UTC
That will rule out a lot of the Perl I read and pretty much all of the Perl I write. Yes, same here, and I commented on that in the issue I linked to above and Sawyer responded here. It doesn't seem to be a technical limitation. Since I think it would be technically possible to parse something like `my %hash = ( foo => -bar );`, that also means that it would be possible to automatically transform that to `my %hash = ( 'foo' => '-bar' );`, for example if that's what the company coding standards happen to be. Update: However, the transformation requires a completely parseable Perl in the first place, which is what we don't have (yet).	[reply] [d/l] [select]
Re^7: poll ideas quest 2021 by Corion (Patriarch) on Aug 18, 2021 at 08:45 UTC
I think the problem with `-bar` is that it is difficult to disambiguate between the expression `'-' bareword` and `'-bareword'` as a single token. Maybe you can fix that by post-processing the generated tree, but my impression is that Sawyer wanted to avoid any "special" logic and have a purely EBNF-driven approach.	[reply] [d/l] [select]
Re^8: poll ideas quest 2021 by haukex (Archbishop) on Aug 18, 2021 at 08:51 UTC


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