Modulevoid-0.7.4Haskell98

Data.Void.Unsafe

Synopsis

valueunsafeVacuous :: Functor f => f Void -> f a

If Void is uninhabited then any Functor that holds only values of the type Void is holding no values.

This is only safe for valid functors that do not perform GADT-like analysis on the argument.

valueunsafeVacuousM :: Monad m => m Void -> m a

If Void is uninhabited then any Monad that holds values of type Void is holding no values.

This is only safe for valid monads that do not perform GADT-like analysis on the argument.