    {-# OPTIONS_GHC -XNoImplicitPrelude #-}
    -----------------------------------------------------------------------------
    -- |
    -- Module      :  Unsafe.Coerce
    -- Copyright   :  Malcolm Wallace 2006
    -- License     :  BSD-style (see the LICENSE file in the distribution)
    --
    -- Maintainer  :  libraries@haskell.org
    -- Stability   :  experimental
    -- Portability :  portable
    --
    -- The highly unsafe primitive 'unsafeCoerce' converts a value from any
    -- type to any other type.  Needless to say, if you use this function,
    -- it is your responsibility to ensure that the old and new types have
    -- identical internal representations, in order to prevent runtime corruption.
    --
    -- The types for which 'unsafeCoerce' is representation-safe may differ
    -- from compiler to compiler (and version to version).
    --
    --   * Documentation for correct usage in GHC will be found under
    --     'unsafeCoerce#' in GHC.Base (around which 'unsafeCoerce' is just a
    --     trivial wrapper).
    --
    --   * In nhc98, the only representation-safe coercions are between Enum
    --     types with the same range (e.g. Int, Int32, Char, Word32),
    --     or between a newtype and the type that it wraps.

    module Unsafe.Coerce (unsafeCoerce) where

    #if defined(__GLASGOW_HASKELL__)
    import GHC.Prim (unsafeCoerce#)
    unsafeCoerce :: a -> b
    unsafeCoerce = unsafeCoerce#
    #endif

    #if defined(__NHC__)
    import NonStdUnsafeCoerce (unsafeCoerce)
    #endif

    #if defined(__HUGS__)
    import Hugs.IOExts (unsafeCoerce)
    #endif