Cabal-3.2.1.0: A framework for packaging Haskell software
Safe Haskell None
Language Haskell2010

Distribution.Utils.IOData

Description

Since: 2.2.0

Synopsis

IOData & IODataMode type

data IOData Source #

Represents either textual or binary data passed via I/O functions which support binary/text mode

Since: 2.2

Constructors

IODataText String

How Text gets encoded is usually locale-dependent.

IODataBinary ByteString

Raw binary which gets read/written in binary mode.

Instances

Instances details
NFData IOData Source #
Instance details

Defined in Distribution.Utils.IOData

Methods

rnf :: IOData -> () Source #

data IODataMode mode where Source #

Since: 3.2

Constructors

IODataModeText :: IODataMode String
IODataModeBinary :: IODataMode ByteString

class NFData mode => KnownIODataMode mode where Source #

Since: 2.2

Methods

hGetIODataContents :: Handle -> IO mode Source #

IOData Wrapper for hGetContents

Note : This operation uses lazy I/O. Use NFData to force all data to be read and consequently the internal file handle to be closed.

toIOData :: mode -> IOData Source #

iodataMode :: IODataMode mode Source #

Instances

Instances details
KnownIODataMode ByteString Source #
Instance details

Defined in Distribution.Utils.IOData

Methods

hGetIODataContents :: Handle -> IO ByteString Source #

toIOData :: ByteString -> IOData Source #

iodataMode :: IODataMode ByteString Source #

a ~ Char => KnownIODataMode [a] Source #
Instance details

Defined in Distribution.Utils.IOData

Methods

hGetIODataContents :: Handle -> IO [a] Source #

toIOData :: [a] -> IOData Source #

iodataMode :: IODataMode [a] Source #

withIOData :: IOData -> ( forall mode. IODataMode mode -> mode -> r) -> r Source #

null :: IOData -> Bool Source #

Test whether IOData is empty

hPutContents :: Handle -> IOData -> IO () Source #

IOData Wrapper for hPutStr and hClose

This is the dual operation ot hGetIODataContents , and consequently the handle is closed with hClose .

Note: this performs lazy-IO.

Since: 2.2