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ekmett / free

free monads
http://hackage.haskell.org/package/free
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make `free` forward`-Wcompat`ible (again) #155

Closed hvr closed 7 years ago

hvr commented 7 years ago

This is a follow-up to c9430031460a7c89038dc5e24796b69f3568b61e but this time we have warning flags we can put in place to get alerted of regressions.

This represents a breaking change as it changes the class constraints for some Monoid instances.

Note: the constraints on some MonadFail could possibly be relaxed