GHC/PArr.hs

    {-# LANGUAGE Trustworthy #-}
    {-# LANGUAGE NoImplicitPrelude #-}
    {-# LANGUAGE ParallelArrays, MagicHash #-}
    {-# OPTIONS_GHC -funbox-strict-fields #-}
    {-# OPTIONS_HADDOCK hide #-}

    -----------------------------------------------------------------------------
    -- |
    -- Module      :  GHC.PArr
    -- Copyright   :  (c) 2001-2011 The Data Parallel Haskell team
    -- License     :  see libraries/base/LICENSE
    --
    -- Maintainer  :  cvs-ghc@haskell.org
    -- Stability   :  internal
    -- Portability :  non-portable (GHC Extensions)
    --
    -- BIG UGLY HACK: The desugarer special cases this module.  Despite the uses of '-XParallelArrays',
    --                the desugarer does not load 'Data.Array.Parallel' into its global state. (Hence,
    --                the present module may not use any other piece of '-XParallelArray' syntax.)
    --
    --                This will be cleaned up when we change the internal represention of '[::]' to not
    --                rely on a wired-in type constructor.

    module GHC.PArr where

    import GHC.Base

    -- Representation of parallel arrays
    --
    -- Vanilla representation of parallel Haskell based on standard GHC arrays that is used if the
    -- vectorised is /not/ used.
    --
    -- NB: This definition *must* be kept in sync with `TysWiredIn.parrTyCon'!
    --
    data [::] e = PArr !Int (Array# e)

    type PArr = [::]   -- this synonym is to get access to '[::]' without using the special syntax