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@yminsky
Created January 8, 2016 01:38
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yet better formatting
let rec lexwhile prop inp =
match inp with
| c::cs when prop c ->
let (tok,rest) = lexwhile prop cs in
(c^tok,rest)
| _ -> ("",inp)
;;
let rec lex inp =
match snd (lexwhile space inp) with
| [] -> []
| c::cs ->
let prop =
if alphanumeric(c) then alphanumeric
else if symbolic(c) then symbolic
else (fun c -> false)
in
let (toktl,rest) = lexwhile prop cs in
(c^toktl) :: lex rest
;;
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