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Re^2: Perl parser gets confused with call to "sort" w/o parens

by vr (Curate)
on May 16, 2018 at 11:29 UTC ( [id://1214642]=note: print w/replies, xml ) Need Help??


in reply to Re: Perl parser gets confused with call to "sort" w/o parens
in thread Perl parser gets confused with call to "sort" w/o parens

:( Oh, indeed, it's documented, thanks. Yet, CL#1 works OK, and the reason why Perl can be confused here and care is required is neither clear nor explained, in documentation. How CL#4 can be parsed to what's printed out, is unclear. OK, just a thought...

Edit: OK, CL#1 was parsed specially because there was single letter identifier:

>perl -lwe "sub x{@_} print sort x(qw(q w e r t y))"
eqrtwy

>perl -lwe "sub xx{@_} print sort xx(qw(q w e r t y))"
qwerty

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Re^3: Perl parser gets confused with call to "sort" w/o parens
by BillKSmith (Monsignor) on May 16, 2018 at 14:53 UTC
    The paragraph that choroba cites, documents four acceptable ways to sort an array returned by a function. I think it is reasonable to assume that anything else is ambiguous and should be considered invalid. In this view, all of your cases are invalid. The fact that some of them appear to do what you intend is irrelevant. It would be helpful if the document explained the reason for this restriction.
    Bill
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