+ parseCall = do
+ func <- lift (munch1 isAlpha)
+ params <- lift $ between (char '(') (char ')') $
+ sepBy (readS_to_P reads)
+ (skipSpaces >> char ',' >> skipSpaces)
+ return (Call func params)
+ parseIf = do
+ lift $ skipSpaces >> string "if" >> skipSpaces
+ cond <- readPrec
+ lift $ skipSpaces >> string "then" >> skipSpaces
+ thenE <- readPrec
+ lift $ skipSpaces >> string "else" >> skipSpaces
+ elseE <- readPrec
+ return (If cond thenE elseE)