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Postings from June 2016
This came up on another thread, but I think it should get its own airing.
qr/ ^ {1,3} /x, warns with "Quantifier unexpected on zero-length expression"
qr/ ^ * /x warns instead with "^ * matches null string many times", and
generates code that will run a very long time.
qr/ ^ ? /x doesn't warn. Nor does qr/ ^ {0,1} /x. But qr/ ^ {0,2} /x
does warn.
It is nonsensical to use a quantifier on an assertion, and for Perl to
try to do so is not likely at all to be DWIM. So I believe we should
deprecate these.
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