{-# OPTIONS_GHC -fno-warn-orphans #-}
module Pandora.Paradigm.Structure.Some.Binary where

import Pandora.Core.Functor (type (~>), type (>), type (<), type (:=>))
import Pandora.Pattern.Semigroupoid ((.))
import Pandora.Pattern.Category ((<--), (<---), (<----), (<-----), (-->), (--->))
import Pandora.Pattern.Kernel (constant)
import Pandora.Pattern.Functor.Covariant (Covariant ((<-|-), (<-|--), (<-|-|-)))
import Pandora.Pattern.Functor.Traversable (Traversable ((<<-)))
import Pandora.Pattern.Functor.Bindable (Bindable ((=<<), (==<<)))
import Pandora.Pattern.Transformer.Liftable (lift)
import Pandora.Pattern.Transformer.Lowerable (lower)
import Pandora.Pattern.Object.Chain (Chain ((<=>)))
import Pandora.Paradigm.Algebraic.Product ((:*:) ((:*:)), type (<:*:>), (<:*:>), attached)
import Pandora.Paradigm.Algebraic.Exponential ((%), (&), (.:..))
import Pandora.Paradigm.Algebraic ((<-*-), (<-*--), (<-*-*-), extract, point, empty)
import Pandora.Paradigm.Primary.Object.Ordering (order)
import Pandora.Paradigm.Primary.Functor (Comparison)
import Pandora.Paradigm.Primary.Functor.Convergence (Convergence (Convergence))
import Pandora.Paradigm.Primary.Functor.Exactly (Exactly (Exactly))
import Pandora.Paradigm.Primary.Functor.Maybe (Maybe (Just, Nothing))
import Pandora.Paradigm.Primary.Functor.Wye (Wye (Left, Right))
import Pandora.Paradigm.Primary.Transformer.Construction (Construction (Construct))
import Pandora.Paradigm.Schemes (TT (TT), T_U (T_U), P_Q_T (P_Q_T), type (<::>), type (<:.:>))
import Pandora.Paradigm.Controlflow.Effect.Interpreted (run, (<~))
import Pandora.Paradigm.Inventory.Ability.Gettable (get)
import Pandora.Paradigm.Inventory.Ability.Settable (set)
import Pandora.Paradigm.Inventory.Ability.Modifiable (modify)
import Pandora.Paradigm.Inventory.Some.Store (Store (Store))
import Pandora.Paradigm.Inventory.Some.Optics (Lens, Obscure, view, replace, mutate)
import Pandora.Paradigm.Structure.Ability.Nonempty (Nonempty)
import Pandora.Paradigm.Structure.Ability.Monotonic (Monotonic (resolve))
import Pandora.Paradigm.Structure.Ability.Morphable (Morphable (Morphing, morphing), morph, premorph
	, Morph (Rotate, Into, Insert, Lookup, Key), Vertical (Up, Down), Horizontal (Leftward, Rightward), lookup)
import Pandora.Paradigm.Structure.Ability.Substructure (Substructure (Substance, substructure), Segment (Root, Branch), sub)
import Pandora.Paradigm.Structure.Interface.Zipper (Zippable (Breadcrumbs))
import Pandora.Paradigm.Structure.Modification.Prefixed (Prefixed (Prefixed))

type Binary = Maybe <::> Construction (Maybe <:*:> Maybe)

--rebalance :: Chain a => (Wye :. Construction Wye > a) -> Nonempty Binary a
--rebalance (Both x y) = extract x <=> extract y & order
--	# Construct (extract x) (Both # rebalance (deconstruct x) # rebalance (deconstruct y))
--	# Construct (extract y) (Both # x # rebalance (deconstruct y))
--	# Construct (extract x) (Both # rebalance (deconstruct x) # y)

-- instance Morphable Insert Binary where
	-- type Morphing Insert Binary = (Exactly <:.:> Comparison > (:*:)) <:.:> Binary > (->)
	-- morphing struct = case run ---> premorph struct of
		-- Nothing -> T_U <-- \(T_U (Exactly x :*: _)) -> lift <-- point x
		-- Just binary -> T_U <-- \(T_U (Exactly x :*: Convergence f)) ->
			-- let continue xs = run <-- morph @Insert @(Nonempty Binary) xs <--- twosome <-- Exactly x <-- Convergence f in
			-- let step = iff @Just <-|-|- get @(Obscure Lens) <-*-*- modify @(Obscure Lens) continue <-*-*- set @(Obscure Lens) <-- point x in
			-- lift <---- order binary
				-- <--- step <-- sub @Left <-- binary
				-- <--- step <-- sub @Right <-- binary
				-- <--- f x <-- extract binary

instance Substructure (Left Branch) Binary where
	type Substance (Left Branch) Binary = Binary
	substructure :: Lens
  (Substance ('Left 'Branch) Binary)
  ((<:.>) (Tagged ('Left 'Branch)) Binary a)
  a
substructure = ((<:.>) (Tagged ('Left 'Branch)) Binary a
 -> Store (Binary a) ((<:.>) (Tagged ('Left 'Branch)) Binary a))
-> P_Q_T
     (->) Store Binary ((<:.>) (Tagged ('Left 'Branch)) Binary a) a
forall (p :: * -> * -> *) (q :: * -> * -> *) (t :: * -> *) a b.
p a (q (t b) a) -> P_Q_T p q t a b
P_Q_T (((<:.>) (Tagged ('Left 'Branch)) Binary a
  -> Store (Binary a) ((<:.>) (Tagged ('Left 'Branch)) Binary a))
 -> P_Q_T
      (->) Store Binary ((<:.>) (Tagged ('Left 'Branch)) Binary a) a)
-> ((<:.>) (Tagged ('Left 'Branch)) Binary a
    -> Store (Binary a) ((<:.>) (Tagged ('Left 'Branch)) Binary a))
-> P_Q_T
     (->) Store Binary ((<:.>) (Tagged ('Left 'Branch)) Binary a) a
forall (m :: * -> * -> *) a b. Category m => m (m a b) (m a b)
<-- \(<:.>) (Tagged ('Left 'Branch)) Binary a
struct -> case Binary a -> (Maybe :. Construction (Maybe <:*:> Maybe)) > a
forall (m :: * -> * -> *) (t :: * -> *) a.
Interpreted m t =>
(m < t a) < Primary t a
run (Binary a -> (Maybe :. Construction (Maybe <:*:> Maybe)) > a)
-> Binary a -> (Maybe :. Construction (Maybe <:*:> Maybe)) > a
forall (m :: * -> * -> *) a b. Category m => m (m a b) (m a b)
<-- (<:.>) (Tagged ('Left 'Branch)) Binary a -> Binary a
forall (cat :: * -> * -> *) (t :: (* -> *) -> * -> *) (u :: * -> *)
       a.
(Lowerable cat t, Covariant cat cat u) =>
cat (t u a) (u a)
lower (<:.>) (Tagged ('Left 'Branch)) Binary a
struct of
		(Maybe :. Construction (Maybe <:*:> Maybe)) > a
Nothing -> (((:*:) (Binary a) :. (->) (Binary a))
 > (<:.>) (Tagged ('Left 'Branch)) Binary a)
-> Store (Binary a) ((<:.>) (Tagged ('Left 'Branch)) Binary a)
forall s a. (((:*:) s :. (->) s) > a) -> Store s a
Store ((((:*:) (Binary a) :. (->) (Binary a))
  > (<:.>) (Tagged ('Left 'Branch)) Binary a)
 -> Store (Binary a) ((<:.>) (Tagged ('Left 'Branch)) Binary a))
-> (((:*:) (Binary a) :. (->) (Binary a))
    > (<:.>) (Tagged ('Left 'Branch)) Binary a)
-> Store (Binary a) ((<:.>) (Tagged ('Left 'Branch)) Binary a)
forall (m :: * -> * -> *) a b. Category m => m (m a b) (m a b)
<--- Binary a
forall (t :: * -> *) a. Emptiable t => t a
empty Binary a
-> (Binary a -> (<:.>) (Tagged ('Left 'Branch)) Binary a)
-> ((:*:) (Binary a) :. (->) (Binary a))
   > (<:.>) (Tagged ('Left 'Branch)) Binary a
forall s a. s -> a -> s :*: a
:*: Binary a -> (<:.>) (Tagged ('Left 'Branch)) Binary a
forall (cat :: * -> * -> *) (t :: (* -> *) -> * -> *) (u :: * -> *)
       a.
(Liftable cat t, Covariant cat cat u) =>
cat (u a) (t u a)
lift (Binary a -> (<:.>) (Tagged ('Left 'Branch)) Binary a)
-> (Binary a -> Binary a)
-> Binary a
-> (<:.>) (Tagged ('Left 'Branch)) Binary a
forall (m :: * -> * -> *) b c a.
Semigroupoid m =>
m b c -> m a b -> m a c
. Binary a -> Binary a -> Binary a
forall (m :: * -> * -> *) a i. Kernel m => m a (m i a)
constant Binary a
forall (t :: * -> *) a. Emptiable t => t a
empty
		Just Construction (Maybe <:*:> Maybe) a
tree -> Binary a -> (<:.>) (Tagged ('Left 'Branch)) Binary a
forall (cat :: * -> * -> *) (t :: (* -> *) -> * -> *) (u :: * -> *)
       a.
(Liftable cat t, Covariant cat cat u) =>
cat (u a) (t u a)
lift (Binary a -> (<:.>) (Tagged ('Left 'Branch)) Binary a)
-> (Construction (Maybe <:*:> Maybe) a -> Binary a)
-> Construction (Maybe <:*:> Maybe) a
-> (<:.>) (Tagged ('Left 'Branch)) Binary a
forall (m :: * -> * -> *) b c a.
Semigroupoid m =>
m b c -> m a b -> m a c
. forall (cat :: * -> * -> *) (t :: (* -> *) -> * -> *) (u :: * -> *)
       a.
(Liftable cat t, Covariant cat cat u) =>
cat (u a) (t u a)
forall (t :: (* -> *) -> * -> *) (u :: * -> *) a.
(Liftable (->) t, Covariant (->) (->) u) =>
u a -> t u a
lift @(->) (Construction (Maybe <:*:> Maybe) a
 -> (<:.>) (Tagged ('Left 'Branch)) Binary a)
-> Store (Binary a) (Construction (Maybe <:*:> Maybe) a)
-> Store (Binary a) ((<:.>) (Tagged ('Left 'Branch)) Binary a)
forall (source :: * -> * -> *) (target :: * -> * -> *)
       (t :: * -> *) a b.
Covariant source target t =>
source a b -> target (t a) (t b)
<-|- forall k (segment :: k) (structure :: * -> *).
(Substructure segment structure, Covariant (->) (->) structure) =>
structure @>>> Substance segment structure
forall (structure :: * -> *).
(Substructure ('Left 'Branch) structure,
 Covariant (->) (->) structure) =>
structure @>>> Substance ('Left 'Branch) structure
sub @(Left Branch) P_Q_T (->) Store Binary (Construction (Maybe <:*:> Maybe) a) a
-> Construction (Maybe <:*:> Maybe) a
-> Store (Binary a) (Construction (Maybe <:*:> Maybe) a)
forall (m :: * -> * -> *) (t :: * -> *) a.
Interpreted m t =>
(m < t a) < Primary t a
<~ Construction (Maybe <:*:> Maybe) a
tree

instance Substructure (Right Branch) Binary where
	type Substance (Right Branch) Binary = Binary
	substructure :: Lens
  (Substance ('Right 'Branch) Binary)
  ((<:.>) (Tagged ('Right 'Branch)) Binary a)
  a
substructure = ((<:.>) (Tagged ('Right 'Branch)) Binary a
 -> Store (Binary a) ((<:.>) (Tagged ('Right 'Branch)) Binary a))
-> P_Q_T
     (->) Store Binary ((<:.>) (Tagged ('Right 'Branch)) Binary a) a
forall (p :: * -> * -> *) (q :: * -> * -> *) (t :: * -> *) a b.
p a (q (t b) a) -> P_Q_T p q t a b
P_Q_T (((<:.>) (Tagged ('Right 'Branch)) Binary a
  -> Store (Binary a) ((<:.>) (Tagged ('Right 'Branch)) Binary a))
 -> P_Q_T
      (->) Store Binary ((<:.>) (Tagged ('Right 'Branch)) Binary a) a)
-> ((<:.>) (Tagged ('Right 'Branch)) Binary a
    -> Store (Binary a) ((<:.>) (Tagged ('Right 'Branch)) Binary a))
-> P_Q_T
     (->) Store Binary ((<:.>) (Tagged ('Right 'Branch)) Binary a) a
forall (m :: * -> * -> *) a b. Category m => m (m a b) (m a b)
<-- \(<:.>) (Tagged ('Right 'Branch)) Binary a
struct -> case Binary a -> (Maybe :. Construction (Maybe <:*:> Maybe)) > a
forall (m :: * -> * -> *) (t :: * -> *) a.
Interpreted m t =>
(m < t a) < Primary t a
run (Binary a -> (Maybe :. Construction (Maybe <:*:> Maybe)) > a)
-> ((<:.>) (Tagged ('Right 'Branch)) Binary a -> Binary a)
-> (<:.>) (Tagged ('Right 'Branch)) Binary a
-> (Maybe :. Construction (Maybe <:*:> Maybe)) > a
forall (m :: * -> * -> *) b c a.
Semigroupoid m =>
m b c -> m a b -> m a c
. Tagged ('Right 'Branch) (Binary a) -> Binary a
forall (t :: * -> *) a. Extractable t => t a -> a
extract (Tagged ('Right 'Branch) (Binary a) -> Binary a)
-> ((<:.>) (Tagged ('Right 'Branch)) Binary a
    -> Tagged ('Right 'Branch) (Binary a))
-> (<:.>) (Tagged ('Right 'Branch)) Binary a
-> Binary a
forall (m :: * -> * -> *) b c a.
Semigroupoid m =>
m b c -> m a b -> m a c
. (<:.>) (Tagged ('Right 'Branch)) Binary a
-> Tagged ('Right 'Branch) (Binary a)
forall (m :: * -> * -> *) (t :: * -> *) a.
Interpreted m t =>
(m < t a) < Primary t a
run ((<:.>) (Tagged ('Right 'Branch)) Binary a
 -> (Maybe :. Construction (Maybe <:*:> Maybe)) > a)
-> (<:.>) (Tagged ('Right 'Branch)) Binary a
-> (Maybe :. Construction (Maybe <:*:> Maybe)) > a
forall (m :: * -> * -> *) a b. Category m => m (m a b) (m a b)
---> (<:.>) (Tagged ('Right 'Branch)) Binary a
struct of
		(Maybe :. Construction (Maybe <:*:> Maybe)) > a
Nothing -> (((:*:) (Binary a) :. (->) (Binary a))
 > (<:.>) (Tagged ('Right 'Branch)) Binary a)
-> Store (Binary a) ((<:.>) (Tagged ('Right 'Branch)) Binary a)
forall s a. (((:*:) s :. (->) s) > a) -> Store s a
Store ((((:*:) (Binary a) :. (->) (Binary a))
  > (<:.>) (Tagged ('Right 'Branch)) Binary a)
 -> Store (Binary a) ((<:.>) (Tagged ('Right 'Branch)) Binary a))
-> (((:*:) (Binary a) :. (->) (Binary a))
    > (<:.>) (Tagged ('Right 'Branch)) Binary a)
-> Store (Binary a) ((<:.>) (Tagged ('Right 'Branch)) Binary a)
forall (m :: * -> * -> *) a b. Category m => m (m a b) (m a b)
<--- Binary a
forall (t :: * -> *) a. Emptiable t => t a
empty Binary a
-> (Binary a -> (<:.>) (Tagged ('Right 'Branch)) Binary a)
-> ((:*:) (Binary a) :. (->) (Binary a))
   > (<:.>) (Tagged ('Right 'Branch)) Binary a
forall s a. s -> a -> s :*: a
:*: Binary a -> (<:.>) (Tagged ('Right 'Branch)) Binary a
forall (cat :: * -> * -> *) (t :: (* -> *) -> * -> *) (u :: * -> *)
       a.
(Liftable cat t, Covariant cat cat u) =>
cat (u a) (t u a)
lift (Binary a -> (<:.>) (Tagged ('Right 'Branch)) Binary a)
-> (Binary a -> Binary a)
-> Binary a
-> (<:.>) (Tagged ('Right 'Branch)) Binary a
forall (m :: * -> * -> *) b c a.
Semigroupoid m =>
m b c -> m a b -> m a c
. Binary a -> Binary a -> Binary a
forall (m :: * -> * -> *) a i. Kernel m => m a (m i a)
constant Binary a
forall (t :: * -> *) a. Emptiable t => t a
empty
		Just Construction (Maybe <:*:> Maybe) a
tree -> Binary a -> (<:.>) (Tagged ('Right 'Branch)) Binary a
forall (cat :: * -> * -> *) (t :: (* -> *) -> * -> *) (u :: * -> *)
       a.
(Liftable cat t, Covariant cat cat u) =>
cat (u a) (t u a)
lift (Binary a -> (<:.>) (Tagged ('Right 'Branch)) Binary a)
-> (Construction (Maybe <:*:> Maybe) a -> Binary a)
-> Construction (Maybe <:*:> Maybe) a
-> (<:.>) (Tagged ('Right 'Branch)) Binary a
forall (m :: * -> * -> *) b c a.
Semigroupoid m =>
m b c -> m a b -> m a c
. forall (cat :: * -> * -> *) (t :: (* -> *) -> * -> *) (u :: * -> *)
       a.
(Liftable cat t, Covariant cat cat u) =>
cat (u a) (t u a)
forall (t :: (* -> *) -> * -> *) (u :: * -> *) a.
(Liftable (->) t, Covariant (->) (->) u) =>
u a -> t u a
lift @(->) (Construction (Maybe <:*:> Maybe) a
 -> (<:.>) (Tagged ('Right 'Branch)) Binary a)
-> Store (Binary a) (Construction (Maybe <:*:> Maybe) a)
-> Store (Binary a) ((<:.>) (Tagged ('Right 'Branch)) Binary a)
forall (source :: * -> * -> *) (target :: * -> * -> *)
       (t :: * -> *) a b.
Covariant source target t =>
source a b -> target (t a) (t b)
<-|- forall k (segment :: k) (structure :: * -> *).
(Substructure segment structure, Covariant (->) (->) structure) =>
structure @>>> Substance segment structure
forall (structure :: * -> *).
(Substructure ('Right 'Branch) structure,
 Covariant (->) (->) structure) =>
structure @>>> Substance ('Right 'Branch) structure
sub @(Right Branch) P_Q_T (->) Store Binary (Construction (Maybe <:*:> Maybe) a) a
-> Construction (Maybe <:*:> Maybe) a
-> Store (Binary a) (Construction (Maybe <:*:> Maybe) a)
forall (m :: * -> * -> *) (t :: * -> *) a.
Interpreted m t =>
(m < t a) < Primary t a
<~ Construction (Maybe <:*:> Maybe) a
tree

-------------------------------------- Non-empty binary tree ---------------------------------------

type instance Nonempty Binary = Construction > Maybe <:*:> Maybe

instance Morphable (Into Binary) (Construction > Maybe <:*:> Maybe) where
	type Morphing (Into Binary) (Construction > Maybe <:*:> Maybe) = Binary
	morphing :: (<::>) (Tagged ('Into Binary)) (Construction (Maybe <:*:> Maybe)) a
-> Morphing ('Into Binary) (Construction (Maybe <:*:> Maybe)) a
morphing = Construction (Maybe <:*:> Maybe) a
-> TT
     Covariant Covariant Maybe (Construction (Maybe <:*:> Maybe)) a
forall (cat :: * -> * -> *) (t :: (* -> *) -> * -> *) (u :: * -> *)
       a.
(Liftable cat t, Covariant cat cat u) =>
cat (u a) (t u a)
lift (Construction (Maybe <:*:> Maybe) a
 -> TT
      Covariant Covariant Maybe (Construction (Maybe <:*:> Maybe)) a)
-> ((<::>)
      (Tagged ('Into Binary)) (Construction (Maybe <:*:> Maybe)) a
    -> Construction (Maybe <:*:> Maybe) a)
-> (<::>)
     (Tagged ('Into Binary)) (Construction (Maybe <:*:> Maybe)) a
-> TT
     Covariant Covariant Maybe (Construction (Maybe <:*:> Maybe)) a
forall (m :: * -> * -> *) b c a.
Semigroupoid m =>
m b c -> m a b -> m a c
. (<::>) (Tagged ('Into Binary)) (Construction (Maybe <:*:> Maybe)) a
-> Construction (Maybe <:*:> Maybe) a
forall k (mod :: k) (struct :: * -> *).
Morphable mod struct =>
(Tagged mod <::> struct) ~> struct
premorph

-- instance Morphable Insert (Construction Wye) where
	-- type Morphing Insert (Construction Wye) = (Exactly <:.:> Comparison > (:*:)) <:.:> Construction Wye > (->)
	-- morphing (premorph -> struct) = T_U <-- \(T_U (Exactly x :*: Convergence f)) ->
		-- let continue xs = run <--- morph @Insert @(Nonempty Binary) xs <---- twosome <--- Exactly x <--- Convergence f in
		-- let step = iff @Just <-|-|- (run .:.. view) <-*-*- mutate continue <-*-*- replace (point x) in
		-- order struct
			-- <---- step <--- sub @Left <--- struct
			-- <---- step <--- sub @Right <--- struct
			-- <---- f x <--- extract struct

-- instance Substructure Left (Construction (Maybe <:*:> Maybe)) where
-- 	type Substance Left (Construction (Maybe <:*:> Maybe)) = Binary
-- 	substructure = P_Q_T <-- \struct -> case extract ---> run struct of
-- 		Construct x (T_U (Nothing :*: Nothing)) -> Store <--- TT Nothing :*: lift . resolve (Construct x . left) (point x) . run
-- 		Construct x (T_U (Just lst :*: Nothing)) -> Store <--- TT (Just lst) :*: lift . Construct x . resolve left end . run
-- 		Construct x (T_U (Nothing :*: Just rst)) -> Store <--- TT Nothing :*: lift . Construct x . resolve (both % rst) (right rst) . run
-- 		Construct x (T_U (Just lst :*: Just rst)) -> Store <--- TT (Just lst) :*: lift . Construct x . resolve (both % rst) (right rst) . run
--
-- instance Substructure Right (Construction (Maybe <:*:> Maybe)) where
-- 	type Substance Right (Construction (Maybe <:*:> Maybe)) = Binary
-- 	substructure = P_Q_T <-- \struct -> case extract <-- run struct of
-- 		Construct x (T_U (Nothing :*: Nothing)) -> Store <--- TT Nothing :*: lift . resolve (Construct x . right) (point x) . run
-- 		Construct x (T_U (Just lst :*: Nothing)) -> Store <--- TT Nothing :*: lift . Construct x . resolve (both lst) (left lst) . run
-- 		Construct x (T_U (Nothing :*: Just rst)) -> Store <--- TT (Just rst) :*: lift . Construct x . resolve right end . run
-- 		Construct x (T_U (Just lst :*: Just rst)) -> Store <--- TT (Just rst) :*: lift . Construct x . resolve (both lst) (left lst) . run

-------------------------------------- Prefixed binary tree ----------------------------------------

instance Chain k => Morphable (Lookup Key) (Prefixed Binary k) where
	type Morphing (Lookup Key) (Prefixed Binary k) = (->) k <::> Maybe
	morphing :: (<::>) (Tagged ('Lookup 'Key)) (Prefixed Binary k) a
-> Morphing ('Lookup 'Key) (Prefixed Binary k) a
morphing (<::>) (Tagged ('Lookup 'Key)) (Prefixed Binary k) a
struct = case TT
  Covariant
  Covariant
  Maybe
  (Construction (Maybe <:*:> Maybe))
  (k :*: a)
-> (Maybe :. Construction (Maybe <:*:> Maybe)) > (k :*: a)
forall (m :: * -> * -> *) (t :: * -> *) a.
Interpreted m t =>
(m < t a) < Primary t a
run (TT
   Covariant
   Covariant
   Maybe
   (Construction (Maybe <:*:> Maybe))
   (k :*: a)
 -> (Maybe :. Construction (Maybe <:*:> Maybe)) > (k :*: a))
-> ((<::>) (Tagged ('Lookup 'Key)) (Prefixed Binary k) a
    -> TT
         Covariant
         Covariant
         Maybe
         (Construction (Maybe <:*:> Maybe))
         (k :*: a))
-> (<::>) (Tagged ('Lookup 'Key)) (Prefixed Binary k) a
-> (Maybe :. Construction (Maybe <:*:> Maybe)) > (k :*: a)
forall (m :: * -> * -> *) b c a.
Semigroupoid m =>
m b c -> m a b -> m a c
. Prefixed Binary k a
-> TT
     Covariant
     Covariant
     Maybe
     (Construction (Maybe <:*:> Maybe))
     (k :*: a)
forall (m :: * -> * -> *) (t :: * -> *) a.
Interpreted m t =>
(m < t a) < Primary t a
run (Prefixed Binary k a
 -> TT
      Covariant
      Covariant
      Maybe
      (Construction (Maybe <:*:> Maybe))
      (k :*: a))
-> ((<::>) (Tagged ('Lookup 'Key)) (Prefixed Binary k) a
    -> Prefixed Binary k a)
-> (<::>) (Tagged ('Lookup 'Key)) (Prefixed Binary k) a
-> TT
     Covariant
     Covariant
     Maybe
     (Construction (Maybe <:*:> Maybe))
     (k :*: a)
forall (m :: * -> * -> *) b c a.
Semigroupoid m =>
m b c -> m a b -> m a c
. (<::>) (Tagged ('Lookup 'Key)) (Prefixed Binary k) a
-> Prefixed Binary k a
forall k (mod :: k) (struct :: * -> *).
Morphable mod struct =>
(Tagged mod <::> struct) ~> struct
premorph ((<::>) (Tagged ('Lookup 'Key)) (Prefixed Binary k) a
 -> (Maybe :. Construction (Maybe <:*:> Maybe)) > (k :*: a))
-> (<::>) (Tagged ('Lookup 'Key)) (Prefixed Binary k) a
-> (Maybe :. Construction (Maybe <:*:> Maybe)) > (k :*: a)
forall (m :: * -> * -> *) a b. Category m => m (m a b) (m a b)
<-- (<::>) (Tagged ('Lookup 'Key)) (Prefixed Binary k) a
struct of
		(Maybe :. Construction (Maybe <:*:> Maybe)) > (k :*: a)
Nothing -> (((->) k :. Maybe) > a) -> TT Covariant Covariant ((->) k) Maybe a
forall k k k k (ct :: k) (ct' :: k) (t :: k -> *) (t' :: k -> k)
       (a :: k).
((t :. t') > a) -> TT ct ct' t t' a
TT ((((->) k :. Maybe) > a)
 -> TT Covariant Covariant ((->) k) Maybe a)
-> (((->) k :. Maybe) > a)
-> TT Covariant Covariant ((->) k) Maybe a
forall (m :: * -> * -> *) a b. Category m => m (m a b) (m a b)
<-- \k
_ -> Maybe a
forall a. Maybe a
Nothing
		Just Construction (Maybe <:*:> Maybe) (k :*: a)
tree -> (((->) k :. Maybe) > a) -> TT Covariant Covariant ((->) k) Maybe a
forall k k k k (ct :: k) (ct' :: k) (t :: k -> *) (t' :: k -> k)
       (a :: k).
((t :. t') > a) -> TT ct ct' t t' a
TT ((((->) k :. Maybe) > a)
 -> TT Covariant Covariant ((->) k) Maybe a)
-> (((->) k :. Maybe) > a)
-> TT Covariant Covariant ((->) k) Maybe a
forall (m :: * -> * -> *) a b. Category m => m (m a b) (m a b)
<-- \k
key ->
			k
key k -> k -> Ordering
forall a. Chain a => a -> a -> Ordering
<=> (k :*: a) -> k
forall a b. (a :*: b) -> a
attached (Construction (Maybe <:*:> Maybe) (k :*: a) -> k :*: a
forall (t :: * -> *) a. Extractable t => t a -> a
extract Construction (Maybe <:*:> Maybe) (k :*: a)
tree) Ordering -> (Ordering -> Maybe a) -> Maybe a
forall a b. a -> (a -> b) -> b
& Maybe a -> Maybe a -> Maybe a -> Ordering -> Maybe a
forall a. a -> a -> a -> Ordering -> a
order
				(Maybe a -> Maybe a -> Maybe a -> Ordering -> Maybe a)
-> Maybe a -> Maybe a -> Maybe a -> Ordering -> Maybe a
forall (m :: * -> * -> *) a b. Category m => m (m a b) (m a b)
<--- a -> Maybe a
forall a. a -> Maybe a
Just (a -> Maybe a) -> a -> Maybe a
forall (m :: * -> * -> *) a b. Category m => m (m a b) (m a b)
--> (k :*: a) -> a
forall (t :: * -> *) a. Extractable t => t a -> a
extract ((k :*: a) -> a) -> (k :*: a) -> a
forall (m :: * -> * -> *) a b. Category m => m (m a b) (m a b)
--> Construction (Maybe <:*:> Maybe) (k :*: a) -> k :*: a
forall (t :: * -> *) a. Extractable t => t a -> a
extract Construction (Maybe <:*:> Maybe) (k :*: a)
tree
				(Maybe a -> Maybe a -> Ordering -> Maybe a)
-> Maybe a -> Maybe a -> Ordering -> Maybe a
forall (m :: * -> * -> *) a b. Category m => m (m a b) (m a b)
<--- k -> Prefixed (Construction (Maybe <:*:> Maybe)) k a -> Maybe a
forall a1 (mod :: a1) key (struct :: * -> *) a2.
Morphed ('Lookup mod) struct ((->) key <::> Maybe) =>
key -> struct a2 -> Maybe a2
lookup @Key k
key (Prefixed (Construction (Maybe <:*:> Maybe)) k a -> Maybe a)
-> (Construction (Maybe <:*:> Maybe) (k :*: a)
    -> Prefixed (Construction (Maybe <:*:> Maybe)) k a)
-> Construction (Maybe <:*:> Maybe) (k :*: a)
-> Maybe a
forall (m :: * -> * -> *) b c a.
Semigroupoid m =>
m b c -> m a b -> m a c
. Construction (Maybe <:*:> Maybe) (k :*: a)
-> Prefixed (Construction (Maybe <:*:> Maybe)) k a
forall (t :: * -> *) k a. ((t :. (:*:) k) > a) -> Prefixed t k a
Prefixed (Construction (Maybe <:*:> Maybe) (k :*: a) -> Maybe a)
-> ((Maybe :. Construction (Maybe <:*:> Maybe)) > (k :*: a))
-> Maybe a
forall (source :: * -> * -> *) (t :: * -> *) a b.
Bindable source t =>
source a (t b) -> source (t a) (t b)
=<< TT
  Covariant
  Covariant
  Maybe
  (Construction (Maybe <:*:> Maybe))
  (k :*: a)
-> (Maybe :. Construction (Maybe <:*:> Maybe)) > (k :*: a)
forall (m :: * -> * -> *) (t :: * -> *) a.
Interpreted m t =>
(m < t a) < Primary t a
run (Lens Binary (Construction (Maybe <:*:> Maybe) (k :*: a)) (k :*: a)
-> Construction (Maybe <:*:> Maybe) (k :*: a)
-> TT
     Covariant
     Covariant
     Maybe
     (Construction (Maybe <:*:> Maybe))
     (k :*: a)
forall (i :: * -> *) source target.
Lens i source target -> source -> i target
view (Lens Binary (Construction (Maybe <:*:> Maybe) (k :*: a)) (k :*: a)
 -> Construction (Maybe <:*:> Maybe) (k :*: a)
 -> TT
      Covariant
      Covariant
      Maybe
      (Construction (Maybe <:*:> Maybe))
      (k :*: a))
-> Lens
     Binary (Construction (Maybe <:*:> Maybe) (k :*: a)) (k :*: a)
-> Construction (Maybe <:*:> Maybe) (k :*: a)
-> TT
     Covariant
     Covariant
     Maybe
     (Construction (Maybe <:*:> Maybe))
     (k :*: a)
forall (m :: * -> * -> *) a b. Category m => m (m a b) (m a b)
<-- forall k (segment :: k) (structure :: * -> *).
(Substructure segment structure, Covariant (->) (->) structure) =>
structure @>>> Substance segment structure
forall (structure :: * -> *).
(Substructure ('Left 'Branch) structure,
 Covariant (->) (->) structure) =>
structure @>>> Substance ('Left 'Branch) structure
sub @(Left Branch) (Construction (Maybe <:*:> Maybe) (k :*: a)
 -> TT
      Covariant
      Covariant
      Maybe
      (Construction (Maybe <:*:> Maybe))
      (k :*: a))
-> Construction (Maybe <:*:> Maybe) (k :*: a)
-> TT
     Covariant
     Covariant
     Maybe
     (Construction (Maybe <:*:> Maybe))
     (k :*: a)
forall (m :: * -> * -> *) a b. Category m => m (m a b) (m a b)
<-- Construction (Maybe <:*:> Maybe) (k :*: a)
tree)
				(Maybe a -> Ordering -> Maybe a) -> Maybe a -> Ordering -> Maybe a
forall (m :: * -> * -> *) a b. Category m => m (m a b) (m a b)
<--- k -> Prefixed (Construction (Maybe <:*:> Maybe)) k a -> Maybe a
forall a1 (mod :: a1) key (struct :: * -> *) a2.
Morphed ('Lookup mod) struct ((->) key <::> Maybe) =>
key -> struct a2 -> Maybe a2
lookup @Key k
key (Prefixed (Construction (Maybe <:*:> Maybe)) k a -> Maybe a)
-> (Construction (Maybe <:*:> Maybe) (k :*: a)
    -> Prefixed (Construction (Maybe <:*:> Maybe)) k a)
-> Construction (Maybe <:*:> Maybe) (k :*: a)
-> Maybe a
forall (m :: * -> * -> *) b c a.
Semigroupoid m =>
m b c -> m a b -> m a c
. Construction (Maybe <:*:> Maybe) (k :*: a)
-> Prefixed (Construction (Maybe <:*:> Maybe)) k a
forall (t :: * -> *) k a. ((t :. (:*:) k) > a) -> Prefixed t k a
Prefixed (Construction (Maybe <:*:> Maybe) (k :*: a) -> Maybe a)
-> ((Maybe :. Construction (Maybe <:*:> Maybe)) > (k :*: a))
-> Maybe a
forall (source :: * -> * -> *) (t :: * -> *) a b.
Bindable source t =>
source a (t b) -> source (t a) (t b)
=<< TT
  Covariant
  Covariant
  Maybe
  (Construction (Maybe <:*:> Maybe))
  (k :*: a)
-> (Maybe :. Construction (Maybe <:*:> Maybe)) > (k :*: a)
forall (m :: * -> * -> *) (t :: * -> *) a.
Interpreted m t =>
(m < t a) < Primary t a
run (Lens Binary (Construction (Maybe <:*:> Maybe) (k :*: a)) (k :*: a)
-> Construction (Maybe <:*:> Maybe) (k :*: a)
-> TT
     Covariant
     Covariant
     Maybe
     (Construction (Maybe <:*:> Maybe))
     (k :*: a)
forall (i :: * -> *) source target.
Lens i source target -> source -> i target
view (Lens Binary (Construction (Maybe <:*:> Maybe) (k :*: a)) (k :*: a)
 -> Construction (Maybe <:*:> Maybe) (k :*: a)
 -> TT
      Covariant
      Covariant
      Maybe
      (Construction (Maybe <:*:> Maybe))
      (k :*: a))
-> Lens
     Binary (Construction (Maybe <:*:> Maybe) (k :*: a)) (k :*: a)
-> Construction (Maybe <:*:> Maybe) (k :*: a)
-> TT
     Covariant
     Covariant
     Maybe
     (Construction (Maybe <:*:> Maybe))
     (k :*: a)
forall (m :: * -> * -> *) a b. Category m => m (m a b) (m a b)
<-- forall k (segment :: k) (structure :: * -> *).
(Substructure segment structure, Covariant (->) (->) structure) =>
structure @>>> Substance segment structure
forall (structure :: * -> *).
(Substructure ('Right 'Branch) structure,
 Covariant (->) (->) structure) =>
structure @>>> Substance ('Right 'Branch) structure
sub @(Right Branch) (Construction (Maybe <:*:> Maybe) (k :*: a)
 -> TT
      Covariant
      Covariant
      Maybe
      (Construction (Maybe <:*:> Maybe))
      (k :*: a))
-> Construction (Maybe <:*:> Maybe) (k :*: a)
-> TT
     Covariant
     Covariant
     Maybe
     (Construction (Maybe <:*:> Maybe))
     (k :*: a)
forall (m :: * -> * -> *) a b. Category m => m (m a b) (m a b)
<-- Construction (Maybe <:*:> Maybe) (k :*: a)
tree)

-- instance Chain k => Morphable (Vary Element) (Prefixed Binary k) where
	-- type Morphing (Vary Element) (Prefixed Binary k) = ((:*:) k <::> Exactly) <:.:> Prefixed Binary k > (->)
	-- morphing struct = case run . run . premorph ! struct of
		-- Nothing -> T_U ! \(TT (key :*: Exactly value)) -> Prefixed . lift . point ! key :*: value
		-- Just tree -> T_U ! \(TT (key :*: Exactly value)) ->
			-- let continue = ((vary @Element @k @_ @(Prefixed Binary _) key value -#=) -#=) in
			-- Prefixed . lift ! key <=> attached (extract tree) & order
				-- # over (sub @Root) (!!!>- value) tree
				-- # over (sub @Left) continue tree
				-- # over (sub @Right) continue tree

---------------------------------- Prefixed non-empty binary tree ----------------------------------

instance Chain key => Morphable (Lookup Key) (Prefixed < Construction (Maybe <:*:> Maybe) < key) where
	type Morphing (Lookup Key) (Prefixed < Construction (Maybe <:*:> Maybe) < key) = (->) key <::> Maybe
	morphing :: (<::>)
  (Tagged ('Lookup 'Key))
  ((Prefixed < Construction (Maybe <:*:> Maybe)) < key)
  a
-> Morphing
     ('Lookup 'Key)
     ((Prefixed < Construction (Maybe <:*:> Maybe)) < key)
     a
morphing ((<) (Prefixed < Construction (Maybe <:*:> Maybe)) key a
-> Construction (Maybe <:*:> Maybe) (key :*: a)
forall (m :: * -> * -> *) (t :: * -> *) a.
Interpreted m t =>
(m < t a) < Primary t a
run ((<) (Prefixed < Construction (Maybe <:*:> Maybe)) key a
 -> Construction (Maybe <:*:> Maybe) (key :*: a))
-> ((<::>)
      (Tagged ('Lookup 'Key))
      ((Prefixed < Construction (Maybe <:*:> Maybe)) < key)
      a
    -> (<) (Prefixed < Construction (Maybe <:*:> Maybe)) key a)
-> (<::>)
     (Tagged ('Lookup 'Key))
     ((Prefixed < Construction (Maybe <:*:> Maybe)) < key)
     a
-> Construction (Maybe <:*:> Maybe) (key :*: a)
forall (m :: * -> * -> *) b c a.
Semigroupoid m =>
m b c -> m a b -> m a c
. (<::>)
  (Tagged ('Lookup 'Key))
  ((Prefixed < Construction (Maybe <:*:> Maybe)) < key)
  a
-> (<) (Prefixed < Construction (Maybe <:*:> Maybe)) key a
forall k (mod :: k) (struct :: * -> *).
Morphable mod struct =>
(Tagged mod <::> struct) ~> struct
premorph -> Construct key :*: a
x ((Maybe <:*:> Maybe) :. Construction (Maybe <:*:> Maybe))
> (key :*: a)
xs) = (((->) key :. Maybe) > a)
-> TT Covariant Covariant ((->) key) Maybe a
forall k k k k (ct :: k) (ct' :: k) (t :: k -> *) (t' :: k -> k)
       (a :: k).
((t :. t') > a) -> TT ct ct' t t' a
TT ((((->) key :. Maybe) > a)
 -> TT Covariant Covariant ((->) key) Maybe a)
-> (((->) key :. Maybe) > a)
-> TT Covariant Covariant ((->) key) Maybe a
forall (m :: * -> * -> *) a b. Category m => m (m a b) (m a b)
<-- \key
key ->
		key
key key -> key -> Ordering
forall a. Chain a => a -> a -> Ordering
<=> (key :*: a) -> key
forall a b. (a :*: b) -> a
attached key :*: a
x Ordering -> (Ordering -> Maybe a) -> Maybe a
forall a b. a -> (a -> b) -> b
& Maybe a -> Maybe a -> Maybe a -> Ordering -> Maybe a
forall a. a -> a -> a -> Ordering -> a
order
			(Maybe a -> Maybe a -> Maybe a -> Ordering -> Maybe a)
-> Maybe a -> Maybe a -> Maybe a -> Ordering -> Maybe a
forall (m :: * -> * -> *) a b. Category m => m (m a b) (m a b)
<---- a -> Maybe a
forall a. a -> Maybe a
Just (a -> Maybe a) -> a -> Maybe a
forall (m :: * -> * -> *) a b. Category m => m (m a b) (m a b)
<-- (key :*: a) -> a
forall (t :: * -> *) a. Extractable t => t a -> a
extract key :*: a
x
			(Maybe a -> Maybe a -> Ordering -> Maybe a)
-> Maybe a -> Maybe a -> Ordering -> Maybe a
forall (m :: * -> * -> *) a b. Category m => m (m a b) (m a b)
<---- key
-> (<) (Prefixed < Construction (Maybe <:*:> Maybe)) key a
-> Maybe a
forall a1 (mod :: a1) key (struct :: * -> *) a2.
Morphed ('Lookup mod) struct ((->) key <::> Maybe) =>
key -> struct a2 -> Maybe a2
lookup @Key key
key ((<) (Prefixed < Construction (Maybe <:*:> Maybe)) key a
 -> Maybe a)
-> (Construction (Maybe <:*:> Maybe) (key :*: a)
    -> (<) (Prefixed < Construction (Maybe <:*:> Maybe)) key a)
-> Construction (Maybe <:*:> Maybe) (key :*: a)
-> Maybe a
forall (m :: * -> * -> *) b c a.
Semigroupoid m =>
m b c -> m a b -> m a c
. Construction (Maybe <:*:> Maybe) (key :*: a)
-> (<) (Prefixed < Construction (Maybe <:*:> Maybe)) key a
forall (t :: * -> *) k a. ((t :. (:*:) k) > a) -> Prefixed t k a
Prefixed (Construction (Maybe <:*:> Maybe) (key :*: a) -> Maybe a)
-> Maybe (Construction (Maybe <:*:> Maybe) (key :*: a)) -> Maybe a
forall (source :: * -> * -> *) (t :: * -> *) a b.
Bindable source t =>
source a (t b) -> source (t a) (t b)
==<< forall e r. Gettable (Obscure Lens) => Getting (Obscure Lens) e r
forall k (i :: k) e r. Gettable i => Getting i e r
get @(Obscure Lens) (Lens
   Maybe
   (((Maybe <:*:> Maybe) :. Construction (Maybe <:*:> Maybe))
    > (key :*: a))
   (Construction (Maybe <:*:> Maybe) (key :*: a))
 -> (((Maybe <:*:> Maybe) :. Construction (Maybe <:*:> Maybe))
     > (key :*: a))
 -> Maybe (Construction (Maybe <:*:> Maybe) (key :*: a)))
-> Lens
     Maybe
     (((Maybe <:*:> Maybe) :. Construction (Maybe <:*:> Maybe))
      > (key :*: a))
     (Construction (Maybe <:*:> Maybe) (key :*: a))
-> (((Maybe <:*:> Maybe) :. Construction (Maybe <:*:> Maybe))
    > (key :*: a))
-> Maybe (Construction (Maybe <:*:> Maybe) (key :*: a))
forall (m :: * -> * -> *) a b. Category m => m (m a b) (m a b)
<-- forall k (segment :: k) (structure :: * -> *).
(Substructure segment structure, Covariant (->) (->) structure) =>
structure @>>> Substance segment structure
forall (structure :: * -> *).
(Substructure 'Left structure, Covariant (->) (->) structure) =>
structure @>>> Substance 'Left structure
sub @Left ((((Maybe <:*:> Maybe) :. Construction (Maybe <:*:> Maybe))
  > (key :*: a))
 -> Maybe (Construction (Maybe <:*:> Maybe) (key :*: a)))
-> (((Maybe <:*:> Maybe) :. Construction (Maybe <:*:> Maybe))
    > (key :*: a))
-> Maybe (Construction (Maybe <:*:> Maybe) (key :*: a))
forall (m :: * -> * -> *) a b. Category m => m (m a b) (m a b)
<-- ((Maybe <:*:> Maybe) :. Construction (Maybe <:*:> Maybe))
> (key :*: a)
xs
			(Maybe a -> Ordering -> Maybe a) -> Maybe a -> Ordering -> Maybe a
forall (m :: * -> * -> *) a b. Category m => m (m a b) (m a b)
<---- key
-> (<) (Prefixed < Construction (Maybe <:*:> Maybe)) key a
-> Maybe a
forall a1 (mod :: a1) key (struct :: * -> *) a2.
Morphed ('Lookup mod) struct ((->) key <::> Maybe) =>
key -> struct a2 -> Maybe a2
lookup @Key key
key ((<) (Prefixed < Construction (Maybe <:*:> Maybe)) key a
 -> Maybe a)
-> (Construction (Maybe <:*:> Maybe) (key :*: a)
    -> (<) (Prefixed < Construction (Maybe <:*:> Maybe)) key a)
-> Construction (Maybe <:*:> Maybe) (key :*: a)
-> Maybe a
forall (m :: * -> * -> *) b c a.
Semigroupoid m =>
m b c -> m a b -> m a c
. Construction (Maybe <:*:> Maybe) (key :*: a)
-> (<) (Prefixed < Construction (Maybe <:*:> Maybe)) key a
forall (t :: * -> *) k a. ((t :. (:*:) k) > a) -> Prefixed t k a
Prefixed (Construction (Maybe <:*:> Maybe) (key :*: a) -> Maybe a)
-> Maybe (Construction (Maybe <:*:> Maybe) (key :*: a)) -> Maybe a
forall (source :: * -> * -> *) (t :: * -> *) a b.
Bindable source t =>
source a (t b) -> source (t a) (t b)
==<< forall e r. Gettable (Obscure Lens) => Getting (Obscure Lens) e r
forall k (i :: k) e r. Gettable i => Getting i e r
get @(Obscure Lens) (Lens
   Maybe
   (((Maybe <:*:> Maybe) :. Construction (Maybe <:*:> Maybe))
    > (key :*: a))
   (Construction (Maybe <:*:> Maybe) (key :*: a))
 -> (((Maybe <:*:> Maybe) :. Construction (Maybe <:*:> Maybe))
     > (key :*: a))
 -> Maybe (Construction (Maybe <:*:> Maybe) (key :*: a)))
-> Lens
     Maybe
     (((Maybe <:*:> Maybe) :. Construction (Maybe <:*:> Maybe))
      > (key :*: a))
     (Construction (Maybe <:*:> Maybe) (key :*: a))
-> (((Maybe <:*:> Maybe) :. Construction (Maybe <:*:> Maybe))
    > (key :*: a))
-> Maybe (Construction (Maybe <:*:> Maybe) (key :*: a))
forall (m :: * -> * -> *) a b. Category m => m (m a b) (m a b)
<-- forall k (segment :: k) (structure :: * -> *).
(Substructure segment structure, Covariant (->) (->) structure) =>
structure @>>> Substance segment structure
forall (structure :: * -> *).
(Substructure 'Left structure, Covariant (->) (->) structure) =>
structure @>>> Substance 'Left structure
sub @Left ((((Maybe <:*:> Maybe) :. Construction (Maybe <:*:> Maybe))
  > (key :*: a))
 -> Maybe (Construction (Maybe <:*:> Maybe) (key :*: a)))
-> (((Maybe <:*:> Maybe) :. Construction (Maybe <:*:> Maybe))
    > (key :*: a))
-> Maybe (Construction (Maybe <:*:> Maybe) (key :*: a))
forall (m :: * -> * -> *) a b. Category m => m (m a b) (m a b)
<-- ((Maybe <:*:> Maybe) :. Construction (Maybe <:*:> Maybe))
> (key :*: a)
xs

-------------------------------------- Zipper of binary tree ---------------------------------------
	{-
data Biforked a = Top | Horizontal (Horizontal a)

instance Covariant (->) (->) Biforked where
	_ <-|- Top = Top
	f <-|- Horizontal (Leftward l) = Horizontal . Leftward <-- f l
	f <-|- Horizontal (Rightward r) = Horizontal . Rightward <-- f r

instance Traversable (->) (->) Biforked where
	_ <<- Top = point Top
	f <<- Horizontal (Leftward l) = Horizontal . Leftward <-|- f l
	f <<- Horizontal (Rightward r) = Horizontal . Rightward <-|- f r

type Bifurcation = Biforked <::> Construction Biforked

type Bicursor = Exactly <:.:> Binary > (:*:)

instance Zippable (Construction Wye) where
	type Breadcrumbs (Construction Wye) = (Wye <::> Construction Wye) <:.:> (Bifurcation <::> Bicursor) > (:*:)

_focused_part_to_nonempty_binary_tree :: (Exactly <:.:> Wye <::> Construction Wye > (:*:)) ~> Construction Wye
_focused_part_to_nonempty_binary_tree (T_U (Exactly x :*: xs)) = Construct x <-- run xs

instance Morphable (Rotate Up) ((Exactly <:.:> Wye <::> Construction Wye > (:*:)) <:.:> (Bifurcation <::> Bicursor) > (:*:)) where
	type Morphing (Rotate Up) ((Exactly <:.:> Wye <::> Construction Wye > (:*:)) <:.:> (Bifurcation <::> Bicursor) > (:*:))
		= Maybe <::> ((Exactly <:.:> Wye <::> Construction Wye > (:*:)) <:.:> Bifurcation <::> Bicursor > (:*:))
	morphing struct = case run ---> premorph struct of
		focused :*: TT (TT (Horizontal (Rightward (Construct (T_U (Exactly parent :*: rest)) next)))) ->
			lift . ((<:*:>) % TT (TT next)) . (<:*:>) (Exactly parent) . TT <---- resolve
				<--- Both <-- _focused_part_to_nonempty_binary_tree focused
				<--- Left <-- _focused_part_to_nonempty_binary_tree focused
				<--- run rest
		focused :*: TT (TT (Horizontal (Leftward (Construct (T_U (Exactly parent :*: rest)) next)))) ->
			lift . ((<:*:>) % TT (TT next)) . (<:*:>) (Exactly parent) . TT <---- resolve
				<--- Both % _focused_part_to_nonempty_binary_tree focused
				<--- Right <-- _focused_part_to_nonempty_binary_tree focused
				<--- run rest
		_ -> TT Nothing

_nonempty_binary_tree_to_focused_part :: Construction Wye ~> Exactly <:.:> Wye <::> Construction Wye > (:*:)
_nonempty_binary_tree_to_focused_part (Construct x xs) = Exactly x <:*:> TT xs

instance Morphable (Rotate > Down Left) ((Exactly <:.:> Wye <::> Construction Wye > (:*:)) <:.:> (Bifurcation <::> Bicursor) > (:*:)) where
	type Morphing (Rotate > Down Left) ((Exactly <:.:> Wye <::> Construction Wye > (:*:)) <:.:> (Bifurcation <::> Bicursor) > (:*:))
		= Maybe <::> ((Exactly <:.:> Wye <::> Construction Wye > (:*:)) <:.:> Bifurcation <::> Bicursor > (:*:))
	morphing struct = case run ---> premorph struct of
		T_U (Exactly x :*: TT (Left lst)) :*: TT (TT next) ->
			lift . (<:*:>) (_nonempty_binary_tree_to_focused_part lst)
				. TT . TT . Horizontal . Leftward <------- Construct
					<------ Exactly x <:*:> TT Nothing
					<------ next
		T_U (Exactly x :*: TT (Both lst rst)) :*: TT (TT next) ->
			lift . (<:*:>) (_nonempty_binary_tree_to_focused_part lst)
				. TT . TT . Horizontal . Leftward <------- Construct
					<------ Exactly x <:*:> lift rst
					<------ next
		_ -> TT Nothing

instance Morphable (Rotate > Down Right) ((Exactly <:.:> Wye <::> Construction Wye > (:*:)) <:.:> (Bifurcation <::> Bicursor) > (:*:)) where
	type Morphing (Rotate > Down Right) ((Exactly <:.:> Wye <::> Construction Wye > (:*:)) <:.:> (Bifurcation <::> Bicursor) > (:*:))
		= Maybe <::> ((Exactly <:.:> Wye <::> Construction Wye > (:*:)) <:.:> Bifurcation <::> Bicursor > (:*:))
	morphing struct = case run ---> premorph struct of
		T_U (Exactly x :*: TT (Right rst)) :*: TT (TT next) ->
			lift . (<:*:>) (_nonempty_binary_tree_to_focused_part rst)
				. TT . TT . Horizontal . Rightward <---- Construct (Exactly x <:*:> TT Nothing) next
		T_U (Exactly x :*: TT (Both lst rst)) :*: TT (TT next) ->
			lift . (<:*:>) (_nonempty_binary_tree_to_focused_part rst)
				. TT . TT . Horizontal . Rightward <---- Construct (Exactly x <:*:> lift lst) next
		_ -> TT Nothing
-}