Agda-2.6.3.20230930: A dependently typed functional programming language and proof assistant
Safe HaskellSafe-Inferred
LanguageHaskell2010

Agda.Utils.Empty

Description

An empty type with some useful instances.

Synopsis

Documentation

data Empty Source #

Instances

Instances details
Show Empty Source # 
Instance details

Defined in Agda.Utils.Empty

Methods

showsPrec :: Int -> Empty -> ShowS

show :: Empty -> String

showList :: [Empty] -> ShowS

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 -> ()

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

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.