In favour of


MaybeT monad transformer compatible with monads-tf (deprecated)

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BSD3 licensed and maintained by Ben Millwood

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.

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