Control/Monad/Writer/Lazy.hs

    -----------------------------------------------------------------------------
    -- |
    -- Module      :  Control.Monad.Writer.Lazy
    -- Copyright   :  (c) Andy Gill 2001,
    --                (c) Oregon Graduate Institute of Science and Technology, 2001
    -- License     :  BSD-style (see the file LICENSE)
    --
    -- Maintainer  :  libraries@haskell.org
    -- Stability   :  experimental
    -- Portability :  non-portable (multi-param classes, functional dependencies)
    --
    -- Lazy writer monads.
    --
    --      Inspired by the paper
    --      /Functional Programming with Overloading and Higher-Order Polymorphism/,
    --        Mark P Jones (<http://web.cecs.pdx.edu/~mpj/pubs/springschool.html>)
    --          Advanced School of Functional Programming, 1995.
    -----------------------------------------------------------------------------

    module Control.Monad.Writer.Lazy (
        -- * MonadWriter class
        MonadWriter(..),
        listens,
        censor,
        -- * The Writer monad
        Writer,
        runWriter,
        execWriter,
        mapWriter,
        -- * The WriterT monad transformer
        WriterT(WriterT),
        runWriterT,
        execWriterT,
        mapWriterT,
        module Control.Monad,
        module Control.Monad.Fix,
        module Control.Monad.Trans,
        module Data.Monoid,
      ) where

    import Control.Monad.Writer.Class

    import Control.Monad.Trans
    import Control.Monad.Trans.Writer.Lazy (
            Writer, runWriter, execWriter, mapWriter,
            WriterT(WriterT), runWriterT, execWriterT, mapWriterT)

    import Control.Monad
    import Control.Monad.Fix
    import Data.Monoid