ocr: Component Description reader Remembers input string for C source. Keeps track of current position in input stream. Remembers current character. Keeps track of current line number (for errors and wamings reported by scanner or parser). Maintains pushback stack for characters. scanner Converts input to token stream. Allows putback of one token. Remembers current token and last-read token. Strips comments from input. Installs identifiers in symbol table. parser Recognizes and validates legal token sequences (sentences). Translates token stream into expressions in target language (Lisp). Parses ty ...
