Monad morphisms

Version on this page:1.1.2
LTS Haskell 12.22:1.1.2
Stackage Nightly 2018-12-14:1.1.2
Latest on Hackage:1.1.2

See all snapshots mmorph appears in

BSD3 licensed by Gabriel Gonzalez
Maintained by

Module documentation for 1.1.2

There are no documented modules for this package.

This library provides monad morphism utilities, most commonly used for manipulating monad transformer stacks.



  • Conditionally disable Polykinds to support older versions of GHC


  • Increase upper bound on transformers-compat


  • BREAKING CHANGE: Enable PolyKinds
    • This should in theory be a non-breaking change, but due to a bug in GHC 8.0.1 and kind inference ambiguities I’m marking this as a breaking change
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