jkozlov orionll
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| {-# LANGUAGE MultiParamTypeClasses #-} | |
| {-#LANGUAGE FlexibleInstances #-} | |
| module CanBuildFrom where | |
| import Data.Foldable | |
| import Data.Map | |
| data Builder from elem to = Builder { | |
| result :: to, | |
| add :: elem -> Builder from elem to |