MaybeT -transformers

package MaybeT
package
Support for computations with failures. Version 0.1.2
package MaybeT-monads-tf
package
Support for computations with failures. This is a fork of the MaybeT package by Eric Kidd, but compatible with the type-family based monad classes of the monads-tf package. This package is deprecated: the MaybeT transformer exists in the transformers package nowadays, and the only advantage this package provides over that one is the presence of a MonadFix instance, but it's incorrect anyway. Version 0.2.0.1
package MaybeT-transformers
package
Support for computations with failures. This package is a fork from the MaybeT package by Eric Kidd, changed to depend on transformers instead of mtl. It also adds a few more utility functions. Version 0.2
maybeToList :: Maybe a -> [a]
base Data.Maybe
The maybeToList function returns an empty list when given Nothing or a singleton list when not given Nothing.