Hoogle Search

Within LTS Haskell 24.52 (ghc-9.10.3)

Note that Stackage only displays results for the latest LTS and Nightly snapshot. Learn more.

Exact lookup

1. fdRead :: Fd -> ByteCount -> IO ByteString

   unix	System.Posix.IO.PosixString

   Read data from an Fd and return it as a ByteString. Throws an exception if this is an invalid descriptor, or EOF has been reached.

2. fdReadBuf :: Fd -> Ptr Word8 -> ByteCount -> IO ByteCount

   unix	System.Posix.IO.PosixString

   Read data from an Fd into memory. This is exactly equivalent to the POSIX read function.

3. semThreadWait :: Semaphore -> IO ()

   unix	System.Posix.Semaphore

   Poll the semaphore until it is available, then lock it. Unlike semWait, this will block only the current thread rather than the entire process.

4. shmReadWrite :: ShmOpenFlags -> Bool

   unix	System.Posix.SharedMem

   If true, open the shm object read-write rather than read-only.

5. backgroundRead :: Signal

   unix	System.Posix.Signals

   Alias for sigTTIN.

6. ropt_threads :: RunnerOptions' (f :: Type -> Type) -> f Int

   test-framework	Test.Framework.Runners.Options

   No documentation available.

7. eitherReader :: (String -> Either String a) -> ReadM a

   optparse-applicative	Options.Applicative

   Convert a function producing an Either into a reader. As an example, one can create a ReadM from an attoparsec Parser easily with

   import qualified Data.Attoparsec.Text as A
   import qualified Data.Text as T
   attoparsecReader :: A.Parser a -> ReadM a
   attoparsecReader p = eitherReader (A.parseOnly p . T.pack)
   

8. maybeReader :: (String -> Maybe a) -> ReadM a

   optparse-applicative	Options.Applicative

   Convert a function producing a Maybe into a reader.

9. eitherReader :: (String -> Either String a) -> ReadM a

   optparse-applicative	Options.Applicative.Builder

   Convert a function producing an Either into a reader. As an example, one can create a ReadM from an attoparsec Parser easily with

   import qualified Data.Attoparsec.Text as A
   import qualified Data.Text as T
   attoparsecReader :: A.Parser a -> ReadM a
   attoparsecReader p = eitherReader (A.parseOnly p . T.pack)
   

10. maybeReader :: (String -> Maybe a) -> ReadM a

    optparse-applicative	Options.Applicative.Builder

    Convert a function producing a Maybe into a reader.

Page 457 of many | Previous | Next