Safe Haskell	None
Language	Haskell2010

Agda.Utils.Empty

Description

An empty type with some useful instances.

Synopsis

Documentation

data Empty Source #

Instances

Instances details

NFData Empty Source #	Values of type `Empty` are not forced, because `Empty` is used as a constructor argument in `Substitution'`.
Instance details Defined in Agda.Utils.Empty Methods rnf :: Empty -> ()
Show Empty Source #
Instance details Defined in Agda.Utils.Empty Methods showsPrec :: Int -> Empty -> ShowS show :: Empty -> String showList :: [Empty] -> ShowS
Eq Empty Source #
Instance details Defined in Agda.Utils.Empty Methods (==) :: Empty -> Empty -> Bool (/=) :: Empty -> Empty -> Bool
Ord Empty Source #
Instance details Defined in Agda.Utils.Empty Methods compare :: Empty -> Empty -> Ordering (<) :: Empty -> Empty -> Bool (<=) :: Empty -> Empty -> Bool (>) :: Empty -> Empty -> Bool (>=) :: Empty -> Empty -> Bool max :: Empty -> Empty -> Empty min :: Empty -> Empty -> Empty

absurd :: Empty -> a Source #

toImpossible :: Empty -> IO Impossible Source #

toImpossible e extracts the Impossible value raised via IMPOSSIBLE to create the element e of type Empty. It proceeds by evaluating e to weak head normal form and catching the exception. We are forced to wrap things in a Maybe because of catchImpossible's type.