polysemy-zoo-0.8.1.0: Experimental, user-contributed effects and interpreters for polysemy
Safe HaskellNone
LanguageHaskell2010

Polysemy.ConstraintAbsorber.MonadWriter

Synopsis

Documentation

absorbWriter Source #

Arguments

:: forall w r a. (Monoid w, Member (Writer w) r) 
=> (MonadWriter w (Sem r) => Sem r a)

A computation that requires an instance of MonadWriter for Sem. This might be something with type MonadWriter w m => m a.

-> Sem r a 

Introduce a local MonadWriter constraint on Sem --- allowing it to interop nicely with MTL.

Since: 0.3.0.0