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  • Ian Lynagh's avatar
    Rejig mtl; trac proposal #1127 · 618e77f3
    Ian Lynagh authored
      Moved the MonadFoo classes to Control.Monad.Foo.Class.
      Put the instances consistently in the module which defines the type they
      give an instance for.
      Made the existing transformers lazy to match the existing monads, and put
      them in Control.Monad.Foo.Lazy. Also added Control.Monad.Foo.Strict with
      strict monads and transformers. Control.Monad.Foo still exports what it
      used to.
      Created a MonadRWS class.
      Made the MonadWriter w (ErrorT e m) instance strict to match everything
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