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Within LTS Haskell 24.51 (ghc-9.10.3)
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readMVar :: NFData a => MVar a -> IO astrict-concurrency Control.Concurrent.MVar.Strict This is a combination of takeMVar and putMVar; ie. it takes the value from the MVar, puts it back, and also returns it.
readFile :: StringRWIO s => FilePath -> IO sstring-class Data.String.Class Read a file and returns the contents of the file as a string Depending on the instance, this function might expect the file to be non-binary. The default definition uses openFile to open the file.
readTorrent :: ByteString -> Either String Torrenttorrent Data.Torrent No documentation available.
readMaybe :: Read a => String -> Maybe averset Verset Parse a string using the Read instance. Succeeds if there is exactly one valid result.
>>> readMaybe "123" :: Maybe Int Just 123
>>> readMaybe "hello" :: Maybe Int Nothing
readUserDirs :: IO (Map String String)xdg-userdirs System.Environment.XDG.UserDir Read user-configured set of user directories (from user-dirs.dirs)
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xmonad-contrib XMonad.Hooks.UrgencyHook X action that returns a list of currently urgent windows. You might use it, or withUrgents, in your custom logHook, to display the workspaces that contain urgent windows.
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xmonad-contrib XMonad.Util.EZConfig Parse a sequence of keys, returning Nothing if there is a parse failure (no parse, or ambiguous parse).
type
ReadS a = String -> [(a, String)]base Prelude A parser for a type a, represented as a function that takes a String and returns a list of possible parses as (a,String) pairs. Note that this kind of backtracking parser is very inefficient; reading a large structure may be quite slow (cf ReadP).
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base System.IO No documentation available.
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base System.IO No documentation available.