8.5 The Code

topdown_recognizer.pl: the top down recognizer
topdown_parser.pl: the top down parser
ourEng.pl: a small grammar of English
topdown_recognizer_tests.pl: input for testing the recognizer
topdown_parser_tests.pl: input for testing the parser
aNbN.pl: $a^nb^n\backslash\{\}$
leftrec.pl: a left-recursive grammar