module Text.Semdoc.Util where

import qualified Data.Char as Char


splitR :: (Char -> Bool) -> String -> [String]
splitR _ [] = []
splitR p s =
  let
    go :: Char -> String -> [String]
    go m s' = case break p s' of
      (b', [])   -> [m:b']
      (b', x:xs) -> (m:b') : go x xs
  in case break p s of
    (b,  [])  -> [b]
    ([], h:t) -> go h t
    (b,  h:t) -> b : go h t


splitCamel :: String -> [String]
splitCamel = splitR (\x -> Char.isUpper x || Char.isDigit x)