Potoki.Produce

Documentation

data Produce element

Passive producer of elements with support for early termination and resource management.

transform :: Transform input output -> Produce input -> Produce output

list :: [input] -> Produce input

vector :: Vector input -> Produce input

hashMapRows :: HashMap a b -> Produce (a, b)

fileBytes :: FilePath -> Produce (Either IOException ByteString)

Read from a file by path.

• Exception-free
• Automatic resource management

fileBytesAtOffset :: FilePath -> Int -> Produce (Either IOException ByteString)

Read from a file by path.

• Exception-free
• Automatic resource management

fileText :: FilePath -> Produce (Either IOException Text)

Read from a file by path.

• Exception-free
• Automatic resource management

stdinBytes :: Produce (Either IOException ByteString)

directoryContents :: FilePath -> Produce (Either IOException FilePath)

Sorted subpaths of the directory.

finiteMVar :: MVar (Maybe element) -> Produce element

Read from MVar. Nothing gets interpreted as the end of input.

infiniteMVar :: MVar element -> Produce element

Read from MVar. Never stops.

enumInRange :: (Enum a, Ord a) => a -> a -> Produce a