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  1. import Data.Char ( isSpace )
  2.  
  3. _sexpr "" = []
  4. _sexpr exp@(tok:exp_t)
  5. 	| id == ""	= [tok]:sexpr exp_t
  6. 	| otherwise	=    id:sexpr exp_tt
  7. 	where
  8. 		(id,exp_tt)	= break isSep exp
  9. 		isSep c		= c `elem` "()" || isSpace c
  10.  
  11. sexpr = _sexpr . dropWhile isSpace
  12.  
  13. main = interact $ unlines . fmap (show . sexpr) . lines
Success #stdin #stdout 0s 4616KB
comments (?)
stdin
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(+ 12 (* 3 4 (+ 1 2 3) 5) 1)
stdout
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["(","+","12","(","*","3","4","(","+","1","2","3",")","5",")","1",")"]
https://ideone.com/WQj5sC
language:
Haskell (ghc 8.4.4)
created:
9 years ago
visibility:
public

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