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Re: regex to parse (nested) parenthesis delimited string?

by fenLisesi (Priest)
on Feb 06, 2007 at 18:11 UTC ( #598606=note: print w/replies, xml ) Need Help??

in reply to regex to parse (nested) parenthesis delimited string?

You could use a canned /regexp?/i as follows:
use strict; use warnings; use Regexp::Common qw(balanced); my @streams = ( '(aaa) (bbb (ccc( ddd) eee)) (fff)', ' (a) ((bc (d)) ef) h', '(a)', '(a) ', '(a) (bc)', '', ); my $PATTERN = $RE{balanced}{-keep}; for my $input (@streams) { print qq("$input" => ); my @pieces = ($input =~ /$PATTERN/g); printf qq(%s\n), join qq( ), map {qq("$_")} @pieces; }
which prints:
"(aaa) (bbb (ccc( ddd) eee)) (fff)" => "(aaa)" "(bbb (ccc( ddd) eee))" + "(fff)" " (a) ((bc (d)) ef) h" => "(a)" "((bc (d)) ef)" "(a)" => "(a)" "(a) " => "(a)" "(a) (bc)" => "(a)" "(bc)" "" =>
This assumes that you had a typo in your post and you actually want balanced parens. Cheers.

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Re^2: regex to parse (nested) parenthesis delimited string?
by varian (Chaplain) on Feb 07, 2007 at 08:25 UTC
    Thanks for the pointer, very useful module indeed and it provides what I needed!

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