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Re^3: map syntax error -- weirdby LanX (Saint) |
on Mar 22, 2013 at 10:54 UTC ( [id://1024918]=note: print w/replies, xml ) | Need Help?? |
> Why does this work? (same result as your proposals) There is no clear rule to distinguish between code-block and hash-ref!!! The parser uses DWIM heuristics to guess if it looks more like a hash-ref or not. (Furthermore "w/o look-ahead") So in complicated cases you need to give hints for what you mean. This ambiguity should be one reason why Perl6 switched from {} to <> to indicate hashes. > UPDATE: Guess: Because there is some statement in there that needs to be executed rather than a static string only? well it's a perfect hash-ref!
But I think the used heuristic must be quite simple, something like (bareword || variable) (comma || fatcomma) (expr) So "$_"."=s" is already to complex to fit this rule of thumb.
Cheers Rolf ( addicted to the Perl Programming Language)
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