Portability | portable |
---|---|
Stability | experimental |
Maintainer | aslatter@gmail.com |
This library is useful for comparing, parsing and printing Universally Unique Identifiers. See http://en.wikipedia.org/wiki/UUID for the general idea. See http://tools.ietf.org/html/rfc4122 for the specification.
For generating UUIDs, check out Data.UUID.V1
, Data.UUID.V5
and
System.Random
.
- data UUID
- toString :: UUID -> String
- fromString :: String -> Maybe UUID
- toByteString :: UUID -> ByteString
- fromByteString :: ByteString -> Maybe UUID
- null :: UUID -> Bool
- nil :: UUID
Documentation
toString :: UUID -> StringSource
Convert a UUID into a hypenated string using lower-case letters. Example:
toString $ fromString "550e8400-e29b-41d4-a716-446655440000"
fromString :: String -> Maybe UUIDSource
toByteString :: UUID -> ByteStringSource
Encode a UUID into a ByteString
in network order.
fromByteString :: ByteString -> Maybe UUIDSource
Extract a UUID from a ByteString
in network byte order.
The argument must be 16 bytes long, otherwise Nothing
is returned.