Safe Haskell	Safe-Inferred
Language	Haskell2010

Control.Process.StdStream

Synopsis

data StdStream
- = Inherit
- | UseHandle Handle
- | CreatePipe
- | NoStream
class GetStdStream a where
- getStdStream :: Getter a StdStream
class GetStdStream a => HasStdStream a where
- stdStream :: Lens' a StdStream
class ReviewStdStream a where
- reviewStdStream :: Review a StdStream
class ReviewStdStream a => AsStdStream a where
- _StdStream :: Prism' a StdStream
- _Inherit :: Prism' a ()
- _CreatePipe :: Prism' a ()
- _UseHandle :: Prism' a Handle
- _NoStream :: Prism' a ()

Documentation

data StdStream #

Constructors

Inherit	Inherit Handle from parent
UseHandle Handle	Use the supplied Handle
CreatePipe	Create a new pipe. The returned `Handle` will use the default encoding and newline translation mode (just like `Handle`s created by `openFile`).
NoStream	Close the stream's file descriptor without passing a Handle. On POSIX systems this may lead to strange behavior in the child process because attempting to read or write after the file has been closed throws an error. This should only be used with child processes that don't use the file descriptor at all. If you wish to ignore the child process's output you should either create a pipe and drain it manually or pass a `Handle` that writes to `/dev/null`.

Instances

Instances details

Show StdStream
Instance details Defined in System.Process.Common Methods showsPrec :: Int -> StdStream -> ShowS # show :: StdStream -> String # showList :: [StdStream] -> ShowS #
AsHandle StdStream Source #	`>>>` `preview _Handle (UseHandle stdout)`Just {handle: <stdout>} `>>>` `preview _Handle (Inherit :: StdStream)`Nothing `>>>` `review _Handle stdout :: StdStream`UseHandle {handle: <stdout>}
Instance details Defined in Control.Process.Handle Methods _Handle :: Prism' StdStream Handle Source #
ReviewHandle StdStream Source #	`>>>` `review reviewHandle stdout :: StdStream`UseHandle {handle: <stdout>}
Instance details Defined in Control.Process.Handle Methods reviewHandle :: Review StdStream Handle Source #
AsStdStream StdStream Source #	`>>>` `preview _Inherit Inherit`Just () `>>>` `preview _Inherit CreatePipe`Nothing `>>>` `preview _CreatePipe CreatePipe`Just () `>>>` `preview _UseHandle (UseHandle stdout)`Just {handle: <stdout>} `>>>` `preview _UseHandle Inherit`Nothing `>>>` `preview _NoStream NoStream`Just () `>>>` `review _Inherit () :: StdStream`Inherit `>>>` `review _CreatePipe () :: StdStream`CreatePipe `>>>` `review _UseHandle stdout :: StdStream`UseHandle {handle: <stdout>} `>>>` `review _NoStream () :: StdStream`NoStream
Instance details Defined in Control.Process.StdStream Methods _StdStream :: Prism' StdStream StdStream Source # _Inherit :: Prism' StdStream () Source # _CreatePipe :: Prism' StdStream () Source # _UseHandle :: Prism' StdStream Handle Source # _NoStream :: Prism' StdStream () Source #
GetStdStream StdStream Source #	`>>>` `view getStdStream Inherit`Inherit
Instance details Defined in Control.Process.StdStream Methods getStdStream :: Getter StdStream StdStream Source #
HasStdStream StdStream Source #	`>>>` `view stdStream Inherit`Inherit `>>>` `set stdStream CreatePipe Inherit`CreatePipe
Instance details Defined in Control.Process.StdStream Methods stdStream :: Lens' StdStream StdStream Source #
ReviewStdStream StdStream Source #	`>>>` `review reviewStdStream Inherit :: StdStream`Inherit
Instance details Defined in Control.Process.StdStream Methods reviewStdStream :: Review StdStream StdStream Source #
Eq StdStream
Instance details Defined in System.Process.Common Methods (==) :: StdStream -> StdStream -> Bool # (/=) :: StdStream -> StdStream -> Bool #

class GetStdStream a where Source #

Type class for values that can be viewed as a StdStream.

>>> view getStdStream Inherit
Inherit

Methods

getStdStream :: Getter a StdStream Source #

Instances

Instances details

GetStdStream StdStream Source #	`>>>` `view getStdStream Inherit`Inherit
Instance details Defined in Control.Process.StdStream Methods getStdStream :: Getter StdStream StdStream Source #

class GetStdStream a => HasStdStream a where Source #

Type class for values with a lens into a StdStream.

>>> view stdStream Inherit
Inherit

Methods

stdStream :: Lens' a StdStream Source #

Instances

Instances details

HasStdStream StdStream Source #	`>>>` `view stdStream Inherit`Inherit `>>>` `set stdStream CreatePipe Inherit`CreatePipe
Instance details Defined in Control.Process.StdStream Methods stdStream :: Lens' StdStream StdStream Source #

class ReviewStdStream a where Source #

Type class for values that can be constructed from a StdStream.

>>> review reviewStdStream Inherit :: StdStream
Inherit

Methods

reviewStdStream :: Review a StdStream Source #

Instances

Instances details

ReviewStdStream StdStream Source #	`>>>` `review reviewStdStream Inherit :: StdStream`Inherit
Instance details Defined in Control.Process.StdStream Methods reviewStdStream :: Review StdStream StdStream Source #

class ReviewStdStream a => AsStdStream a where Source #

Type class for values with a prism into a StdStream.

>>> preview _StdStream Inherit
Just Inherit

Minimal complete definition

_StdStream

Methods

_StdStream :: Prism' a StdStream Source #

_Inherit :: Prism' a () Source #

_CreatePipe :: Prism' a () Source #

_UseHandle :: Prism' a Handle Source #

_NoStream :: Prism' a () Source #

Instances

Instances details

AsStdStream StdStream Source #

>>> preview _Inherit Inherit
Just ()
>>> preview _Inherit CreatePipe
Nothing
>>> preview _CreatePipe CreatePipe
Just ()
>>> preview _UseHandle (UseHandle stdout)
Just {handle: <stdout>}
>>> preview _UseHandle Inherit
Nothing
>>> preview _NoStream NoStream
Just ()
>>> review _Inherit () :: StdStream
Inherit
>>> review _CreatePipe () :: StdStream
CreatePipe
>>> review _UseHandle stdout :: StdStream
UseHandle {handle: <stdout>}
>>> review _NoStream () :: StdStream
NoStream

Instance details

Defined in Control.Process.StdStream

Methods

_StdStream :: Prism' StdStream StdStream Source #

_Inherit :: Prism' StdStream () Source #

_CreatePipe :: Prism' StdStream () Source #

_UseHandle :: Prism' StdStream Handle Source #

_NoStream :: Prism' StdStream () Source #