Set.lhs

%  Copyright (C) 2003 David Roundy
%
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%  it under the terms of the GNU General Public License as published by
%  the Free Software Foundation; either version 2, or (at your option)
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%  This program is distributed in the hope that it will be useful,
%  but WITHOUT ANY WARRANTY; without even the implied warranty of
%  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
%  GNU General Public License for more details.
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%  along with this program; see the file COPYING.  If not, write to
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\begin{code}
{-# OPTIONS_GHC -cpp #-}
#include "gadts.h"
module Darcs.Patch.Set ( PatchSet, SealedPatchSet ) where

import Darcs.Hopefully ( PatchInfoAnd )
import Darcs.Patch.Ordered ( RL )
import Darcs.Sealed ( Sealed )

-- A PatchSet is in reverse order, plus has information about which tags
-- are clean, meaning all patches applied prior to them are in the tag
-- itself, so we can stop reading at that point.  Just to clarify, the
-- first patch in a PatchSet is the one most recently applied to the repo.
type PatchSet p C(x) = RL (RL (PatchInfoAnd p)) C(() x)

type SealedPatchSet p = Sealed (RL (RL (PatchInfoAnd p)) C(()))
\end{code}