module Darcs.Patch.Bracketed
    ( Bracketed(..), mapBracketed, unBracketed
    , BracketedFL, mapBracketedFLFL, unBracketedFL
    ) where

import Prelude ()
import Darcs.Prelude

import Darcs.Patch.Format ( PatchListFormat )
import Darcs.Patch.Witnesses.Ordered ( FL(..), mapFL_FL, concatFL )

-- |This type exists for legacy support of on-disk format patch formats.
-- It is a wrapper type that explicitly tracks the nesting of braces and parens
-- in the on-disk representation of such patches. It is used as an intermediate
-- form when reading such patches normally, and also for round-tripping such
-- patches when checking the hash in bundles.
-- It shouldn't be used for anything else.
data Bracketed p wX wY where
  Singleton :: p wX wY -> Bracketed p wX wY            -- A single patch, not wrapped in anything
  Braced :: BracketedFL p wX wY -> Bracketed p wX wY   -- A list of patches, wrapped in {}
  Parens :: BracketedFL p wX wY -> Bracketed p wX wY   -- A list of patches, wrapped in ()

type BracketedFL p wX wY = FL (Bracketed p) wX wY

unBracketed :: Bracketed p wX wY -> FL p wX wY
unBracketed :: Bracketed p wX wY -> FL p wX wY
unBracketed (Singleton p :: p wX wY
p) = p wX wY
p p wX wY -> FL p wY wY -> FL p wX wY
forall (a :: * -> * -> *) wX wY wZ.
a wX wY -> FL a wY wZ -> FL a wX wZ
:>: FL p wY wY
forall (a :: * -> * -> *) wX. FL a wX wX
NilFL
unBracketed (Braced ps :: BracketedFL p wX wY
ps) = BracketedFL p wX wY -> FL p wX wY
forall (p :: * -> * -> *) wX wY. BracketedFL p wX wY -> FL p wX wY
unBracketedFL BracketedFL p wX wY
ps
unBracketed (Parens ps :: BracketedFL p wX wY
ps) = BracketedFL p wX wY -> FL p wX wY
forall (p :: * -> * -> *) wX wY. BracketedFL p wX wY -> FL p wX wY
unBracketedFL BracketedFL p wX wY
ps

unBracketedFL :: BracketedFL p wX wY -> FL p wX wY
unBracketedFL :: BracketedFL p wX wY -> FL p wX wY
unBracketedFL = FL (FL p) wX wY -> FL p wX wY
forall (a :: * -> * -> *) wX wZ. FL (FL a) wX wZ -> FL a wX wZ
concatFL (FL (FL p) wX wY -> FL p wX wY)
-> (BracketedFL p wX wY -> FL (FL p) wX wY)
-> BracketedFL p wX wY
-> FL p wX wY
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (forall wW wY. Bracketed p wW wY -> FL p wW wY)
-> BracketedFL p wX wY -> FL (FL p) wX wY
forall (a :: * -> * -> *) (b :: * -> * -> *) wX wZ.
(forall wW wY. a wW wY -> b wW wY) -> FL a wX wZ -> FL b wX wZ
mapFL_FL forall wW wY. Bracketed p wW wY -> FL p wW wY
forall (p :: * -> * -> *) wX wY. Bracketed p wX wY -> FL p wX wY
unBracketed

mapBracketed :: (forall wA wB . p wA wB -> q wA wB) -> Bracketed p wX wY -> Bracketed q wX wY
mapBracketed :: (forall wA wB. p wA wB -> q wA wB)
-> Bracketed p wX wY -> Bracketed q wX wY
mapBracketed f :: forall wA wB. p wA wB -> q wA wB
f (Singleton p :: p wX wY
p) = q wX wY -> Bracketed q wX wY
forall (p :: * -> * -> *) wX wY. p wX wY -> Bracketed p wX wY
Singleton (p wX wY -> q wX wY
forall wA wB. p wA wB -> q wA wB
f p wX wY
p)
mapBracketed f :: forall wA wB. p wA wB -> q wA wB
f (Braced ps :: BracketedFL p wX wY
ps) = BracketedFL q wX wY -> Bracketed q wX wY
forall (p :: * -> * -> *) wX wY.
BracketedFL p wX wY -> Bracketed p wX wY
Braced ((forall wA wB. p wA wB -> q wA wB)
-> BracketedFL p wX wY -> BracketedFL q wX wY
forall (p :: * -> * -> *) (q :: * -> * -> *) wX wY.
(forall wA wB. p wA wB -> q wA wB)
-> BracketedFL p wX wY -> BracketedFL q wX wY
mapBracketedFLFL forall wA wB. p wA wB -> q wA wB
f BracketedFL p wX wY
ps)
mapBracketed f :: forall wA wB. p wA wB -> q wA wB
f (Parens ps :: BracketedFL p wX wY
ps) = BracketedFL q wX wY -> Bracketed q wX wY
forall (p :: * -> * -> *) wX wY.
BracketedFL p wX wY -> Bracketed p wX wY
Parens ((forall wA wB. p wA wB -> q wA wB)
-> BracketedFL p wX wY -> BracketedFL q wX wY
forall (p :: * -> * -> *) (q :: * -> * -> *) wX wY.
(forall wA wB. p wA wB -> q wA wB)
-> BracketedFL p wX wY -> BracketedFL q wX wY
mapBracketedFLFL forall wA wB. p wA wB -> q wA wB
f BracketedFL p wX wY
ps)

mapBracketedFLFL :: (forall wA wB . p wA wB -> q wA wB) -> BracketedFL p wX wY -> BracketedFL q wX wY
mapBracketedFLFL :: (forall wA wB. p wA wB -> q wA wB)
-> BracketedFL p wX wY -> BracketedFL q wX wY
mapBracketedFLFL f :: forall wA wB. p wA wB -> q wA wB
f = (forall wW wY. Bracketed p wW wY -> Bracketed q wW wY)
-> BracketedFL p wX wY -> BracketedFL q wX wY
forall (a :: * -> * -> *) (b :: * -> * -> *) wX wZ.
(forall wW wY. a wW wY -> b wW wY) -> FL a wX wZ -> FL b wX wZ
mapFL_FL ((forall wA wB. p wA wB -> q wA wB)
-> Bracketed p wW wY -> Bracketed q wW wY
forall (p :: * -> * -> *) (q :: * -> * -> *) wX wY.
(forall wA wB. p wA wB -> q wA wB)
-> Bracketed p wX wY -> Bracketed q wX wY
mapBracketed forall wA wB. p wA wB -> q wA wB
f)

instance PatchListFormat (Bracketed p)