If I am given a regexp in Perl, can I find out how many capturing brackets there are?
So, for example:
\w -> 0
(\w) -> 1
(\w(\w)) -> 2
If I am given a regexp in Perl, can I find out how many
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If I am given a regexp in Perl, can I find out how many capturing brackets there are?
So, for example:
\w -> 0
(\w) -> 1
(\w(\w)) -> 2
There are two special array @- and @+ containing the start positions
and the end positions of successful matches. Use the array length
when matching is done.
Static analysis: To know all pairs you need to parse the regex string.
Count all unescaped opening bracktes which have a closing one.