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SEXP-parser in LISP

Name: Anonymous 2010-12-27 20:55


parseWS xs -> all \Space xs
parseNumber [@xs] -> if (all digit? xs) then asBase 10 xs
parseSymbol [@xs] -> if (all alpha? xs) then asSymbol xs
parseRest x -> x.{[] => 'nil; [@!WS] => 'nil
                  [\Space @!WS e:!Sexp es:!Rest] => if es=='nil [e] [e@es]}
parseList xs -> parseRest [\Space @xs]
parseSexp x -> x.{[e:!Number]=>e; [e:!Symbol]=>e
                  [\( @!WS es:!List \)] => e}

Name: Anonymous 2010-12-29 7:11

>>30
Truth is much too complicated to allow anything but approximations. -- John von Neumann

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