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Re: Re: Re: Re: Apocalypse 3by TheDamian (Vicar) |
on Oct 04, 2001 at 14:24 UTC ( [id://116667]=note: print w/replies, xml ) | Need Help?? |
Perl might try to correct the parsing of: $x = $y //foo/; That will depend on how the Perl 6 parser works. If it pre-tokenizes (like Perl 5 does) then we shall almost certainly still have a "longest interpretation possible" tokenizing rule. So: $x = $y //foo/; will have to be interpreted as: $x = $y // foo/; But if (as I hope) we tokenize on-the-fly, then the parser will be able to backtrack this incorrect interpretation and re-parse it as: $x = $y / /foo/; instead. Indeed, if that is the parsing strategy, the issue here would never even arise, since the higher precedence of / over // would see that interpretation considered first. (Of course, there would be backtracking when compiling: $x = $y //foo; in that case, since the higher precedence interpretation doesn't work.) Personally, I think JIT tokenization will be the only feasible approach for Perl 6, given how mutable the language will be (e.g. user-defined operators). And, almost as a happy by-product, that is likely to inject the maximum degree of DWIMity into the language. Damian
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