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August 9, 2018 14:28
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convert ScanM to Pipe
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| import Control.Scanl | |
| import Pipes | |
| import Pipes.Lift | |
| scanMToPipe :: (Monad m) => ScanM m a b -> Pipe a b m () | |
| scanMToPipe (ScanM step initial) = | |
| let pipe = do | |
| a <- await | |
| b <- lift $ step a | |
| yield b | |
| pipe | |
| in lift initial >>= flip evalStateP pipe |
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