So you don't want to test and reject unbalanced parens? for instance: 

$string = "((2 > 1) | ('word' eq 'toy')))";

[download]
If you did you may want to use one of the balanced modules to verify balance of the parens.

-Waswas

In reply to Re: Re: Parsing parenthetical arguments recursively by waswas-fng
in thread Parsing parenthetical arguments recursively by Moe

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