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  1. maybeLens :: a -> Lens' a b -> Lens' (Maybe a) b

    cabal-debian Debian.Debianize.Prelude

    No documentation available.

  2. maybeRead :: Read a => String -> Maybe a

    cabal-debian Debian.Debianize.Prelude

    No documentation available.

  3. maybeDecompress :: ByteString -> ByteString

    cabal-install Distribution.Client.GZipUtils

    Attempts to decompress the bytes under the assumption that "data format" error at the very beginning of the stream means that it is already decompressed. Caller should make sanity checks to verify that it is not, in fact, garbage. This is to deal with http proxies that lie to us and transparently decompress without removing the content-encoding header. See: https://github.com/haskell/cabal/issues/678

  4. maybeRepoRemote :: Repo -> Maybe RemoteRepo

    cabal-install Distribution.Client.Types.Repo

    Extract RemoteRepo from Repo if remote.

  5. maybeColor :: Handle -> [SGR] -> String -> IO String

    cabal2nix Distribution.Nixpkgs.Color

    If the given Handle should be colored, wrap a String in SGR codes.

  6. maybeBuildTopEntity :: Maybe String -> Name -> Q (TExp (Maybe TopEntity))

    clash-prelude Clash.Annotations.TH

    Return a typed 'Maybe TopEntity' expression given a Name. This will return an TExp of Nothing if TopEntity generation failed.

  7. maybeHasX :: (NFData a, NFDataX a) => a -> Maybe a

    clash-prelude Clash.XException

    Fully evaluate a value, returning Nothing if it throws XException. Note that non-XException errors take precedence over XException ones. 

    maybeHasX 42                    = Just 42
maybeHasX (XException msg)      = Nothing
maybeHasX (3, XException msg)   = Nothing
maybeHasX (XException msg, _|_) = _|_
maybeHasX (_|_, XException msg) = _|_
maybeHasX (3, _|_)              = _|_
maybeHasX _|_                   = _|_

  8. maybeIsX :: a -> Maybe a

    clash-prelude Clash.XException

    Evaluate a value to WHNF, returning Nothing if it throws XException. 

    maybeIsX 42                  = Just 42
maybeIsX (XException msg)    = Nothing
maybeIsX (3, XException msg) = Just (3, XException msg)
maybeIsX (3, _|_)            = Just (3, _|_)
maybeIsX _|_                 = _|_

  9. maybeX :: (String -> b) -> (a -> b) -> MaybeX a -> b

    clash-prelude Clash.XException.MaybeX

    Map functions over both constructors.

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

    configuration-tools Configuration.Utils.CommandLine

    Convert a function producing a Maybe into a reader.

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