16. The system of claim 1 , wherein the parser comprises: a pre-match buffer configured to selectively forward characters of the input string; disambiguating logic, having an input configured to receive selected characters of the input string from the pre-match buffer, having a first output to generate a control signal, and having a second output to generate an activation signal; and a filter having a first input configured to receive the selectively forwarded characters from the pre-match buffer, having a second input configured to receive the activation signal, and having an output configured to generate the filtered input string in response to the selectively forwarded characters and the activation signal.
16. The system of claim 1 , wherein the parser comprises: a pre-match buffer configured to selectively forward characters of the input string; disambiguating logic, having an input configured to receive selected characters of the input string from the pre-match buffer, having a first output to generate a control signal, and having a second output to generate an activation signal; and a filter having a first input configured to receive the selectively forwarded characters from the pre-match buffer, having a second input configured to receive the activation signal, and having an output configured to generate the filtered input string in response to the selectively forwarded characters and the activation signal. 18. The system of claim 16 , wherein the pre-match buffer is configured to selectively discard the characters of the input string in response to the control signal.