On Fri, 11 Nov 2011 20:09:49 +0400, Philip Hazel <[email protected]>
wrote:
A name may also be returned after a failed match if the final path
through the pattern involves (*MARK). However, unless (*MARK) used in
conjunction with (*COMMIT), this is unlikely to happen for an
unanchored pattern because, as the starting point for matching is
advanced, the final check is often with an empty string, causing a
failure before (*MARK) is reached.
I suppose is not the Perl way. It seems that Perl keeps last MARK value
regardless starting point was advanced.
Perl code:
$_ = "abc";
if (/b(*:m)f|a(*:n)w/) { print "-YES-$REGMARK"; }
else { print "-NO-$REGERROR"; }
Result:
-NO-m
*MARK:m was keeped by Perl in $REGERROR and may be accessed after match
fails.
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