:

(:+) :: a -> a -> Complex a
base Data.Complex
forms a complex number from its real and imaginary rectangular components.
data (:->) a c
QuickCheck Test.QuickCheck.Function
keyword ::
keyword
Read as "has type": > length :: [a] -> Int "Length has type list-of-'a' to Int" Or "has kind" (GHC specific): > Either :: * -> * -> *
(:<) :: a -> Seq a -> ViewL a
containers Data.Sequence
leftmost element and the rest of the sequence
(:>) :: Seq a -> a -> ViewR a
containers Data.Sequence
the sequence minus the rightmost element, and the rightmost element
(~:) :: Testable t => String -> t -> Test
HUnit Test.HUnit.Base
Creates a test from the specified Testable, with the specified label attached to it. Since Test is Testable, this can be used as a shorthand way of attaching a TestLabel to one or more tests.