Safe Haskell	Safe-Inferred
Language	GHC2021

Polysemy.Process.Effect.ProcessOutput

Description

Synopsis

data OutputPipe
- = Stdout
- | Stderr
data ProcessOutput (p :: OutputPipe) a :: Effect where
- Chunk :: ByteString -> ByteString -> ProcessOutput p a m ([a], ByteString)
chunk :: forall p a r. Member (ProcessOutput p a) r => ByteString -> ByteString -> Sem r ([a], ByteString)

Documentation

data OutputPipe Source #

Kind tag for selecting the ProcessOutput handler for stdout/stderr.

Constructors

Stdout	Tag for stdout.
Stderr	Tag for stderr.

Instances

Instances details

Show OutputPipe Source #
Instance details Defined in Polysemy.Process.Effect.ProcessOutput Methods showsPrec :: Int -> OutputPipe -> ShowS # show :: OutputPipe -> String # showList :: [OutputPipe] -> ShowS #
Eq OutputPipe Source #
Instance details Defined in Polysemy.Process.Effect.ProcessOutput Methods (==) :: OutputPipe -> OutputPipe -> Bool # (/=) :: OutputPipe -> OutputPipe -> Bool #

data ProcessOutput (p :: OutputPipe) a :: Effect where Source #

This effect is used by the effect Process to accumulate and decode chunks of ByteStrings, for example using a parser. The interpreter may be stateful or stateless, since the constructor Chunk is expected to be called with both the accumulated unprocessed output as well as the new chunk.

Constructors

Chunk	Add a chunk of output to the accumulator, returning any number of successfully parsed values and the leftover output.
Fields :: ByteString The accumulation of the previous leftovers. -> ByteString The new chunk read from the process. -> ProcessOutput p a m ([a], ByteString)

chunk :: forall p a r. Member (ProcessOutput p a) r => ByteString -> ByteString -> Sem r ([a], ByteString) Source #

Add a chunk of output to the accumulator, returning any number of successfully parsed values and the leftover output.