recursive-descent-parser three-address-code top-down-parser slr-parser nfa-to-dfa-conversion ll1-parser whitespace-removal bottom-up-parser string-recognition first-and-follow predictive-parser lr0-parser identifier-validation identifying-comment recognize-string validate-identifier recognize-token recognize-blank-space whitespace-recognize

algorithm pattern-recognition string-distance string-distance-calculation nomial-data nonmetric-data string-recognition