A push-down automata <sp?> (or stack machine) is required to read a Context Free Grammer. The Perl "Regular expression engine" is a stack machine due to the way it processes expressions in () and (?...). I would argue (and take the time to flesh out my logic) that the Perl RE Engine is actually a CFG engine.

In reply to Re: Re: Perl and Context Free Grammar by Anonymous Monk
in thread Perl and Context Free Grammar by timothy

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