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Re: import list

by chromatic (Archbishop)
on Jun 23, 2012 at 19:08 UTC ( #978002=note: print w/replies, xml ) Need Help??

in reply to import list

perldoc perlop's Symbolic Unary Operators section explains this unary minus:

Unary "-" performs arithmetic negation if the operand is numeric, including any string that looks like a number. If the operand is an identifier, a string consisting of a minus sign concatenated with the identifier is returned.

In effect, it makes a bareword an unambiguous string constant. There's nothing special about this syntax when used in import lists (except that you'd have to write something like use English '-no_match_vars'; as an equivalent.)

Improve your skills with Modern Perl: the free book.

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Re^2: import list
by GrandFather (Sage) on Jun 23, 2012 at 22:39 UTC

    Actually the - is just a character inside a qw() so it has no special meaning and no syntax beyond the fact that it isn't a white space character and isn't the closing character for the qw() applies.

    True laziness is hard work

      Yes, true.

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