I was visiting Mark-Jason Dominus' homepage for some tidbits of wisdom, and noticed a regex that should indicate whether a string has all parentheses matched or not: 
$_='a(b(c)d(e(f)g)h)i(j(k)l(m)n)o';
$_='a(b(c)d(e(f(g)h)i(j(k)l(m)n)o)';

print 1 while s/[(][^()][)]//;

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However, I dont know how to use this code. The second binding $_ should return a 0 and the first should return a 1. the print is an addition by me and I see it's fault: it is saying while this works print a 1, but I dont know a way to say when this doesnt work print something other than a 1 so I know that the string has imbalanced parens somewhere

In reply to getting a return code from a looping regular expression by princepawn

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