Odt reader: remove dead code

The ODT reader contained a lot of general code useful for working with
arrows. However, many of these utils weren't used and are hence removed.

7 files changed, 4 insertions, 902 deletions

diff --git a/src/Text/Pandoc/Readers/Odt/Arrows/State.hs b/src/Text/Pandoc/Readers/Odt/Arrows/State.hs
index b056f1ecc..3d716ba19 100644
--- a/src/Text/Pandoc/Readers/Odt/Arrows/State.hs
+++ b/src/Text/Pandoc/Readers/Odt/Arrows/State.hs
@@ -59,10 +59,6 @@ withState           :: (state -> a -> (state, b)) -> ArrowState state a b
 withState            = ArrowState . uncurry
 
 -- | Constructor
-withState'          :: ((state, a) -> (state, b)) -> ArrowState state a b
-withState'           = ArrowState
-
--- | Constructor
 modifyState         :: (state      ->  state    ) -> ArrowState state a a
 modifyState          = ArrowState . first
 
@@ -79,10 +75,6 @@ extractFromState    :: (state      ->         b ) -> ArrowState state x b
 extractFromState   f = ArrowState $ \(state,_) -> (state, f state)
 
 -- | Constructor
-withUnchangedState  :: (state -> a ->         b ) -> ArrowState state a b
-withUnchangedState f = ArrowState $ \(state,a) -> (state, f state a)
-
--- | Constructor
 tryModifyState      :: (state ->  Either f state)
                     -> ArrowState state a (Either f a)
 tryModifyState     f = ArrowState $ \(state,a)
@@ -107,43 +99,9 @@ instance ArrowChoice (ArrowState state) where
                                  Left  l -> (s, Left l)
                                  Right r -> second Right $ runArrowState a (s,r)
 
-instance ArrowLoop (ArrowState state) where
-  loop   a          = ArrowState $ \(s, x)
-                            -> let (s', (x', _d)) = runArrowState a (s, (x, _d))
-                               in  (s', x')
-
 instance ArrowApply (ArrowState state) where
    app             = ArrowState $ \(s, (f,b)) -> runArrowState f (s,b)
 
-
--- | Embedding of a state arrow in a state arrow with a different state type.
-switchState :: (s -> s') -> (s' -> s) -> ArrowState s' x y -> ArrowState s x y
-switchState there back a = ArrowState $     first there
-                                        >>> runArrowState a
-                                        >>> first back
-
--- | Lift a state arrow to modify the state of an arrow
--- with a different state type.
-liftToState :: (s -> s') -> ArrowState s' s s -> ArrowState s x x
-liftToState unlift a = modifyState $     unlift &&& id
-                                     >>> runArrowState a
-                                     >>> snd
-
--- | Switches the type of the state temporarily.
--- Drops the intermediate result state, behaving like the identity arrow,
--- save for side effects in the state.
-withSubState :: ArrowState s x s2 -> ArrowState s2 s s -> ArrowState s x x
-withSubState unlift a = keepingTheValue (withSubState unlift a) >>^ fst
-
--- | Switches the type of the state temporarily.
--- Returns the resulting sub-state.
-withSubState' :: ArrowState s x s' -> ArrowState s' s s -> ArrowState s x s'
-withSubState' unlift a = ArrowState $     runArrowState unlift
-                                      >>> switch
-                                      >>> runArrowState a
-                                      >>> switch
-  where switch (x,y) = (y,x)
-
 -- | Switches the type of the state temporarily.
 -- Drops the intermediate result state, behaving like a fallible
 -- identity arrow, save for side effects in the state.
@@ -175,42 +133,6 @@ foldS :: (Foldable f, Monoid m) => ArrowState s x m -> ArrowState s (f x) m
 foldS a = ArrowState $ \(s,f) -> foldr a' (s,mempty) f
   where a' x (s',m) = second (m <>)  $ runArrowState a (s',x)
 
--- | Fold a state arrow through something 'Foldable'. Collect the results
--- in a 'Monoid'.
--- Intermediate form of a fold between one with "only" a 'Monoid'
--- and one with any function.
-foldSL :: (Foldable f, Monoid m) => ArrowState s x m -> ArrowState s (f x) m
-foldSL a = ArrowState $ \(s,f) -> foldl a' (s,mempty) f
-  where a' (s',m) x = second (m <>)  $ runArrowState a (s',x)
-
--- | Fold a fallible state arrow through something 'Foldable'. Collect the
--- results in a 'Monoid'.
--- Intermediate form of a fold between one with "only" a 'Monoid'
--- and one with any function.
--- If the iteration fails, the state will be reset to the initial one.
-foldS' :: (Foldable f, Monoid m)
-       => ArrowState s    x  (Either e m)
-       -> ArrowState s (f x) (Either e m)
-foldS' a = ArrowState $ \(s,f) -> foldr (a' s) (s,Right mempty) f
-  where a' s x (s',Right m) = case runArrowState a (s',x) of
-                                (s'',Right m') -> (s'', Right (m <> m'))
-                                (_  ,Left  e ) -> (s  , Left  e)
-        a' _ _   e          = e
-
--- | Fold a fallible state arrow through something 'Foldable'. Collect the
--- results in a 'Monoid'.
--- Intermediate form of a fold between one with "only" a 'Monoid'
--- and one with any function.
--- If the iteration fails, the state will be reset to the initial one.
-foldSL' :: (Foldable f, Monoid m)
-        => ArrowState s    x  (Either e m)
-        -> ArrowState s (f x) (Either e m)
-foldSL' a = ArrowState $ \(s,f) -> foldl (a' s) (s,Right mempty) f
-  where a' s (s',Right m) x = case runArrowState a (s',x) of
-                                (s'',Right m') -> (s'', Right (m <> m'))
-                                (_  ,Left  e ) -> (s  , Left  e)
-        a' _    e         _ = e
-
 -- | Fold a state arrow through something 'Foldable'. Collect the results in a
 -- 'MonadPlus'.
 iterateS :: (Foldable f, MonadPlus m)
@@ -239,15 +161,3 @@ iterateS' a = ArrowState $ \(s,f) -> foldr (a' s) (s,Right mzero) f
                                 (s'',Right m') -> (s'',Right $ mplus m $ return m')
                                 (_  ,Left  e ) -> (s  ,Left  e )
         a' _ _   e          = e
-
--- | Fold a fallible state arrow through something 'Foldable'.
--- Collect the results in a 'MonadPlus'.
--- If the iteration fails, the state will be reset to the initial one.
-iterateSL' :: (Foldable f, MonadPlus m)
-           => ArrowState s    x  (Either e    y )
-           -> ArrowState s (f x) (Either e (m y))
-iterateSL' a = ArrowState $ \(s,f) -> foldl (a' s) (s,Right mzero) f
-  where a' s (s',Right m) x = case runArrowState a (s',x) of
-                                (s'',Right m') -> (s'',Right $ mplus m $ return m')
-                                (_  ,Left  e ) -> (s  ,Left  e )
-        a' _     e        _ = e
diff --git a/src/Text/Pandoc/Readers/Odt/Arrows/Utils.hs b/src/Text/Pandoc/Readers/Odt/Arrows/Utils.hs
index 218a85661..ecef8b6e3 100644
--- a/src/Text/Pandoc/Readers/Odt/Arrows/Utils.hs
+++ b/src/Text/Pandoc/Readers/Odt/Arrows/Utils.hs
@@ -40,10 +40,7 @@ with an equivalent return value.
 module Text.Pandoc.Readers.Odt.Arrows.Utils where
 
 import           Control.Arrow
-import           Control.Monad                         ( join, MonadPlus(..) )
-
-import qualified Data.Foldable                    as F
-import           Data.Monoid
+import           Control.Monad                         ( join )
 
 import           Text.Pandoc.Readers.Odt.Generic.Fallible
 import           Text.Pandoc.Readers.Odt.Generic.Utils
@@ -63,12 +60,6 @@ and5 :: (Arrow a)
 and6 :: (Arrow a)
      => a b c0->a b c1->a b c2->a b c3->a b c4->a b c5
      -> a b (c0,c1,c2,c3,c4,c5      )
-and7 :: (Arrow a)
-     => a b c0->a b c1->a b c2->a b c3->a b c4->a b c5->a b c6
-     -> a b (c0,c1,c2,c3,c4,c5,c6   )
-and8 :: (Arrow a)
-     => a b c0->a b c1->a b c2->a b c3->a b c4->a b c5->a b c6->a b c7
-     -> a b (c0,c1,c2,c3,c4,c5,c6,c7)
 
 and3 a b c           = (and2 a b          ) &&& c
                        >>^ \((z,y          ) , x) -> (z,y,x          )
@@ -78,10 +69,6 @@ and5 a b c d e       = (and4 a b c d      ) &&& e
                        >>^ \((z,y,x,w      ) , v) -> (z,y,x,w,v      )
 and6 a b c d e f     = (and5 a b c d e    ) &&& f
                        >>^ \((z,y,x,w,v    ) , u) -> (z,y,x,w,v,u    )
-and7 a b c d e f g   = (and6 a b c d e f  ) &&& g
-                       >>^ \((z,y,x,w,v,u  ) , t) -> (z,y,x,w,v,u,t  )
-and8 a b c d e f g h = (and7 a b c d e f g) &&& h
-                       >>^ \((z,y,x,w,v,u,t) , s) -> (z,y,x,w,v,u,t,s)
 
 liftA2 :: (Arrow a) => (x -> y -> z) -> a b x -> a b y -> a b z
 liftA2 f a b = a &&& b >>^ uncurry f
@@ -98,19 +85,11 @@ liftA5 :: (Arrow a) => (z->y->x->w->v          -> r)
 liftA6 :: (Arrow a) => (z->y->x->w->v->u       -> r)
                     -> a b z->a b y->a b x->a b w->a b v->a b u
                     -> a b r
-liftA7 :: (Arrow a) => (z->y->x->w->v->u->t    -> r)
-                    -> a b z->a b y->a b x->a b w->a b v->a b u->a b t
-                    -> a b r
-liftA8 :: (Arrow a) => (z->y->x->w->v->u->t->s -> r)
-                    -> a b z->a b y->a b x->a b w->a b v->a b u->a b t->a b s
-                    -> a b r
 
 liftA3 fun a b c           = and3 a b c           >>^ uncurry3 fun
 liftA4 fun a b c d         = and4 a b c d         >>^ uncurry4 fun
 liftA5 fun a b c d e       = and5 a b c d e       >>^ uncurry5 fun
 liftA6 fun a b c d e f     = and6 a b c d e f     >>^ uncurry6 fun
-liftA7 fun a b c d e f g   = and7 a b c d e f g   >>^ uncurry7 fun
-liftA8 fun a b c d e f g h = and8 a b c d e f g h >>^ uncurry8 fun
 
 liftA :: (Arrow a) => (y -> z) -> a b y -> a b z
 liftA  fun a = a >>^ fun
@@ -124,28 +103,12 @@ liftA  fun a = a >>^ fun
 duplicate :: (Arrow a) => a b (b,b)
 duplicate = arr $ join (,)
 
--- | Lifts the combination of two values into an arrow.
-joinOn :: (Arrow a) => (x -> y -> z) -> a (x,y) z
-joinOn = arr.uncurry
-
 -- | Applies a function to the uncurried result-pair of an arrow-application.
 -- (The %-symbol was chosen to evoke an association with pairs.)
 (>>%) :: (Arrow a) => a x (b,c) -> (b -> c -> d) -> a x d
 a >>% f = a >>^ uncurry f
 
--- | '(>>%)' with its arguments flipped
-(%<<) :: (Arrow a) => (b -> c -> d) -> a x (b,c) -> a x d
-(%<<) = flip (>>%)
-
--- | Precomposition with an uncurried function
-(%>>) :: (Arrow a) => (b -> c -> d) -> a d r -> a (b,c) r
-f %>> a = uncurry f ^>> a
-
--- | Precomposition with an uncurried function (right to left variant)
-(<<%) :: (Arrow a) => a d r -> (b -> c -> d) -> a (b,c) r
-(<<%) = flip (%>>)
-
-infixr 2 >>%, %<<, %>>, <<%
+infixr 2 >>%
 
 
 -- | Duplicate a value and apply an arrow to the second instance.
@@ -156,56 +119,6 @@ infixr 2 >>%, %<<, %>>, <<%
 keepingTheValue :: (Arrow a) => a b c -> a b (b,c)
 keepingTheValue a = returnA &&& a
 
--- | Duplicate a value and apply an arrow to the first instance.
--- Aequivalent to
--- > \a -> duplicate >>> first a
--- or
--- > \a -> a &&& returnA
-keepingTheValue' :: (Arrow a) => a b c -> a b (c,b)
-keepingTheValue' a = a &&& returnA
-
--- | 'bind' from the "Maybe"-Monad lifted into an 'ArrowChoice'.
--- Actually, it's the more complex '(>=>)', because 'bind' alone does not
--- combine as nicely in arrow form.
--- The current implementation is not the most efficient one, because it can
--- not return directly if a 'Nothing' is encountered. That in turn follows
--- from the type system, as 'Nothing' has an "invisible" type parameter that
--- can not be dropped early.
---
--- Also, there probably is a way to generalize this to other monads
--- or applicatives, but I'm leaving that as an exercise to the reader.
--- I have a feeling there is a new Arrow-typeclass to be found that is less
--- restrictive than 'ArrowApply'. If it is already out there,
--- I have not seen it yet. ('ArrowPlus' for example is not general enough.)
-(>>>=) :: (ArrowChoice a) => a x (Maybe b) -> a b (Maybe c) -> a x (Maybe c)
-a1 >>>= a2 = a1 >>> maybeToChoice >>> right a2 >>> choiceToMaybe >>^ join
-
-infixr 2 >>>=
-
--- | 'mplus' Lifted into an arrow. No 'ArrowPlus' required.
--- (But still different from a true bind)
-(>++<) :: (Arrow a, MonadPlus m) => a x (m b) -> a x (m b) -> a x (m b)
-(>++<) = liftA2 mplus
-
--- | Left-compose with a pure function
-leftLift :: (ArrowChoice a) => (l -> l') -> a (Either l r) (Either l' r)
-leftLift = left.arr
-
--- | Right-compose with a pure function
-rightLift :: (ArrowChoice a) => (r -> r') -> a (Either l r) (Either l r')
-rightLift = right.arr
-
-
-( ^+++  ) :: (ArrowChoice a) => (b -> c) ->  a b' c'   -> a (Either b b') (Either c c')
-(  +++^ ) :: (ArrowChoice a) =>  a b c   -> (b' -> c') -> a (Either b b') (Either c c')
-( ^+++^ ) :: (ArrowChoice a) => (b -> c) -> (b' -> c') -> a (Either b b') (Either c c')
-
-l ^+++  r  = leftLift l >>> right r
-l  +++^ r  = left     l >>> rightLift r
-l ^+++^ r  = leftLift l >>> rightLift r
-
-infixr 2 ^+++, +++^, ^+++^
-
 ( ^|||  ) :: (ArrowChoice a) => (b -> d) ->  a c d   -> a (Either b c) d
 (  |||^ ) :: (ArrowChoice a) =>  a b d   -> (c -> d) -> a (Either b c) d
 ( ^|||^ ) :: (ArrowChoice a) => (b -> d) -> (c -> d) -> a (Either b c) d
@@ -218,33 +131,12 @@ infixr 2 ^||| ,  |||^, ^|||^
 
 ( ^&&&  ) :: (Arrow a) => (b -> c) ->  a b c'   -> a b (c,c')
 (  &&&^ ) :: (Arrow a) =>  a b c   -> (b -> c') -> a b (c,c')
-( ^&&&^ ) :: (Arrow a) => (b -> c) -> (b -> c') -> a b (c,c')
 
 l ^&&&  r = arr l &&&     r
 l  &&&^ r =     l &&& arr r
-l ^&&&^ r = arr l &&& arr r
-
-infixr 3 ^&&&, &&&^, ^&&&^
 
-( ^***  ) :: (Arrow a) => (b -> c) ->  a b' c'   -> a (b,b') (c,c')
-(  ***^ ) :: (Arrow a) =>  a b c   -> (b' -> c') -> a (b,b') (c,c')
-( ^***^ ) :: (Arrow a) => (b -> c) -> (b' -> c') -> a (b,b') (c,c')
+infixr 3 ^&&&, &&&^
 
-l ^***  r = arr l ***     r
-l  ***^ r =     l *** arr r
-l ^***^ r = arr l *** arr r
-
-infixr 3 ^***, ***^, ^***^
-
--- | A version of
---
--- >>> \p -> arr (\x -> if p x the  Right x else Left x)
---
--- but with p being an arrow
-choose :: (ArrowChoice a) => a b Bool -> a b (Either b b)
-choose checkValue = keepingTheValue checkValue >>^ select
-  where select (x,True  ) = Right x
-        select (x,False ) = Left  x
 
 -- | Converts @Right a@ into @Just a@ and @Left _@ into @Nothing@.
 choiceToMaybe :: (ArrowChoice a) => a (Either l r) (Maybe r)
@@ -258,130 +150,15 @@ maybeToChoice = arr maybeToEither
 returnV :: (Arrow a) => c -> a x c
 returnV = arr.const
 
--- | 'returnA' dropping everything
-returnA_ :: (Arrow a) => a _b ()
-returnA_  = returnV ()
-
--- | Wrapper for an arrow that can be evaluated im parallel. All
--- Arrows can be evaluated in parallel, as long as they return a
--- monoid.
-newtype ParallelArrow a b c = CoEval { evalParallelArrow :: a b c }
-  deriving (Eq, Ord, Show)
-
-instance (Arrow a, Monoid m) => Monoid (ParallelArrow a b m) where
-  mempty = CoEval $ returnV mempty
-  (CoEval a) `mappend` (CoEval ~b) = CoEval $ a &&& b >>% mappend
-
--- | Evaluates a collection of arrows in a parallel fashion.
---
--- This is in essence a fold of '(&&&)' over the collection,
--- so the actual execution order and parallelity depends on the
--- implementation of '(&&&)' in the arrow in question.
--- The default implementation of '(&&&)' for example keeps the
--- order as given in the collection.
---
--- This function can be seen as a generalization of
--- 'Control.Applicative.sequenceA' to arrows or as an alternative to
--- a fold with 'Control.Applicative.WrappedArrow', which
--- substitutes the monoid with function application.
---
-coEval :: (Arrow a, F.Foldable f, Monoid m) => f (a b m) -> a b m
-coEval = evalParallelArrow . (F.foldMap CoEval)
-
 -- | Defines Left as failure, Right as success
 type FallibleArrow a input failure success = a input (Either failure success)
 
-type ReFallibleArrow a failure success success'
-     = FallibleArrow a (Either failure success) failure success'
-
--- | Wrapper for fallible arrows. Fallible arrows are all arrows that return
--- an Either value where left is a faliure and right is a success value.
-newtype AlternativeArrow a input failure success
-  = TryArrow { evalAlternativeArrow :: FallibleArrow a input failure success }
-
-
-instance (ArrowChoice a, Monoid failure)
-         => Monoid (AlternativeArrow a input failure success) where
-  mempty = TryArrow $ returnV $ Left mempty
-  (TryArrow a) `mappend` (TryArrow b)
-         = TryArrow $ a &&& b
-                      >>^ \(a',~b')
-                          -> ( (\a'' -> left (mappend a'') b') ||| Right )
-                               a'
-
--- | Evaluates a collection of fallible arrows, trying each one in succession.
--- Left values are interpreted as failures, right values as successes.
---
--- The evaluation is stopped once an arrow succeeds.
--- Up to that point, all failures are collected in the failure-monoid.
--- Note that '()' is a monoid, and thus can serve as a failure-collector if
--- you are uninterested in the exact failures.
---
--- This is in essence a fold of '(&&&)' over the collection, enhanced with a
--- little bit of repackaging, so the actual execution order depends on the
--- implementation of '(&&&)' in the arrow in question.
--- The default implementation of '(&&&)' for example keeps the
--- order as given in the collection.
---
-tryArrows         :: (ArrowChoice a, F.Foldable f, Monoid failure)
-                  => f (FallibleArrow a b failure success)
-                  ->    FallibleArrow a b failure success
-tryArrows         = evalAlternativeArrow . (F.foldMap TryArrow)
-
---
-liftSuccess       :: (ArrowChoice a)
-                  => (success -> success')
-                  -> ReFallibleArrow a failure success success'
-liftSuccess       = rightLift
-
 --
 liftAsSuccess     :: (ArrowChoice a)
                   => a x success
                   -> FallibleArrow a x failure success
 liftAsSuccess a   = a >>^ Right
 
---
-asFallibleArrow   :: (ArrowChoice a)
-                  => a x success
-                  -> FallibleArrow a x failure success
-asFallibleArrow a = a >>^ Right
-
--- | Raises an error into a 'ReFallibleArrow' if the arrow is already in
--- "error mode"
-liftError         :: (ArrowChoice a, Monoid failure)
-                  => failure
-                  -> ReFallibleArrow a failure success success
-liftError e       = leftLift (e <>)
-
--- | Raises an error into a 'FallibleArrow', droping both the arrow input
--- and any previously stored error value.
-_raiseA           :: (ArrowChoice a)
-                  => failure
-                  -> FallibleArrow a x failure success
-_raiseA e         = returnV (Left e)
-
--- | Raises an empty error into a 'FallibleArrow', droping both the arrow input
--- and any previously stored error value.
-_raiseAEmpty      :: (ArrowChoice a, Monoid failure)
-                  => FallibleArrow a x failure success
-_raiseAEmpty      = _raiseA mempty
-
--- | Raises an error into a 'ReFallibleArrow', possibly appending the new error
--- to an existing one
-raiseA            :: (ArrowChoice a, Monoid failure)
-                  => failure
-                  -> ReFallibleArrow a failure success success
-raiseA e          = arr $ Left.(either (<> e) (const e))
-
--- | Raises an empty error into a 'ReFallibleArrow'. If there already is an
--- error, nothing changes.
--- (Note that this function is only aequivalent to @raiseA mempty@ iff the
--- failure monoid follows the monoid laws.)
-raiseAEmpty       :: (ArrowChoice a, Monoid failure)
-                  => ReFallibleArrow a failure success success
-raiseAEmpty       = arr (fromRight (const mempty) >>> Left)
-
-
 -- | Execute the second arrow if the first succeeds
 (>>?) :: (ArrowChoice a)
             => FallibleArrow a x       failure success
@@ -410,20 +187,6 @@ a >>?^? b = a >>> Left ^|||^ b
             -> FallibleArrow a x       failure success'
 a ^>>? b = a ^>> Left ^||| b
 
--- | Execute the lifted second arrow if the lifted first arrow succeeds
-(^>>?^) :: (ArrowChoice a)
-            => (x            -> Either failure success)
-            -> (success                     -> success')
-            -> FallibleArrow a x       failure success'
-a ^>>?^ f = arr $ a >>> right f
-
--- | Execute the lifted second arrow if the lifted first arrow succeeds
-(^>>?^?) :: (ArrowChoice a)
-            => (x            -> Either failure success)
-            -> (success      -> Either failure success')
-            -> FallibleArrow a x       failure success'
-a ^>>?^? f = a ^>> Left ^|||^ f
-
 -- | Execute the second, non-fallible arrow if the first arrow succeeds
 (>>?!) :: (ArrowChoice a)
             => FallibleArrow a x       failure success
@@ -453,33 +216,9 @@ a ^>>?% f = arr a >>?^ (uncurry f)
 a >>?%? f = a >>?^? (uncurry f)
 
 infixr 1  >>?,  >>?^,  >>?^?
-infixr 1 ^>>?, ^>>?^, ^>>?^?, >>?!
+infixr 1 ^>>?, >>?!
 infixr 1 >>?%, ^>>?%, >>?%?
 
--- | Keep values that are Right, replace Left values by a constant.
-ifFailedUse :: (ArrowChoice a) => v -> a (Either f v) v
-ifFailedUse v = arr $ either (const v) id
-
--- | '(&&)' lifted into an arrow
-(<&&>) :: (Arrow a) => a x Bool -> a x Bool -> a x Bool
-(<&&>) = liftA2 (&&)
-
--- | '(||)' lifted into an arrow
-(<||>) :: (Arrow a) => a x Bool -> a x Bool -> a x Bool
-(<||>) = liftA2 (||)
-
--- | An equivalent of '(&&)' in a fallible arrow
-(>&&<) :: (ArrowChoice a, Monoid f) => FallibleArrow a x f s
-                                    -> FallibleArrow a x f s'
-                                    -> FallibleArrow a x f (s,s')
-(>&&<) = liftA2 chooseMin
-
--- | An equivalent of '(||)' in some forms of fallible arrows
-(>||<) :: (ArrowChoice a, Monoid f, Monoid s) => FallibleArrow a x f s
-                                              -> FallibleArrow a x f s
-                                              -> FallibleArrow a x f s
-(>||<) = liftA2 chooseMax
-
 -- | An arrow version of a short-circuit (<|>)
 ifFailedDo :: (ArrowChoice a)
            => FallibleArrow a x f y
@@ -489,7 +228,4 @@ ifFailedDo a b = keepingTheValue a >>> repackage ^>> (b |||^ Right)
   where repackage (x , Left  _) = Left  x
         repackage (_ , Right y) = Right y
 
-infixr 4 <&&>, <||>, >&&<, >||<
 infixr 1 `ifFailedDo`
-
-
diff --git a/src/Text/Pandoc/Readers/Odt/ContentReader.hs b/src/Text/Pandoc/Readers/Odt/ContentReader.hs
index a1bd8cb59..777c10df5 100644
--- a/src/Text/Pandoc/Readers/Odt/ContentReader.hs
+++ b/src/Text/Pandoc/Readers/Odt/ContentReader.hs
@@ -94,8 +94,6 @@ data ReaderState
                  , envMedia         :: Media
                    -- | Hold binary resources used in the document
                  , odtMediaBag      :: MediaBag
---               , sequences
---               , trackedChangeIDs
                  }
   deriving ( Show )
 
@@ -899,9 +897,6 @@ read_reference_ref = matchingElement NsText "reference-ref"
 -- Entry point
 ----------------------
 
---read_plain_content :: OdtReaderSafe _x Inlines
---read_plain_content = strContent >>^ text
-
 read_text :: OdtReaderSafe _x Pandoc
 read_text = matchChildContent' [ read_header
                                , read_paragraph
diff --git a/src/Text/Pandoc/Readers/Odt/Generic/Fallible.hs b/src/Text/Pandoc/Readers/Odt/Generic/Fallible.hs
index 877443543..4d6a67b8e 100644
--- a/src/Text/Pandoc/Readers/Odt/Generic/Fallible.hs
+++ b/src/Text/Pandoc/Readers/Odt/Generic/Fallible.hs
@@ -39,10 +39,6 @@ compatible instances of "ArrowChoice".
 -- We export everything
 module Text.Pandoc.Readers.Odt.Generic.Fallible where
 
-import           Control.Applicative
-import           Control.Monad
-
-import qualified Data.Foldable       as F
 import           Data.Monoid ((<>))
 
 -- | Default for now. Will probably become a class at some point.
@@ -51,16 +47,6 @@ type Failure = ()
 type Fallible a = Either Failure a
 
 
--- | False -> Left (), True -> Right ()
-boolToEither :: Bool -> Fallible ()
-boolToEither False = Left  ()
-boolToEither True  = Right ()
-
--- | False -> Left (), True -> Right ()
-boolToChoice :: Bool -> Fallible ()
-boolToChoice False = Left  ()
-boolToChoice True  = Right ()
-
 --
 maybeToEither :: Maybe a -> Fallible a
 maybeToEither (Just a) = Right a
@@ -71,21 +57,11 @@ eitherToMaybe :: Either _l a -> Maybe a
 eitherToMaybe (Left  _) = Nothing
 eitherToMaybe (Right a) = Just a
 
--- | > untagEither === either id id
-untagEither :: Either a a -> a
-untagEither (Left  a) = a
-untagEither (Right a) = a
-
 -- | > fromLeft f === either f id
 fromLeft :: (a -> b) -> Either a b -> b
 fromLeft f (Left  a) = f a
 fromLeft _ (Right b) = b
 
--- | > fromRight f === either id f
-fromRight :: (a -> b) -> Either b a -> b
-fromRight _ (Left  b) = b
-fromRight f (Right a) = f a
-
 -- | > recover a === fromLeft (const a) === either (const a) id
 recover :: a -> Either _f a -> a
 recover a (Left  _) = a
@@ -110,24 +86,6 @@ collapseEither (Left f         ) = Left f
 collapseEither (Right (Left  f)) = Left f
 collapseEither (Right (Right x)) = Right x
 
--- | If either of the values represents an error, the result is a
--- (possibly combined) error. If both values represent a success,
--- both are returned.
-chooseMin :: (Monoid a) => Either a b -> Either a b' -> Either a (b,b')
-chooseMin = chooseMinWith (,)
-
--- | If either of the values represents an error, the result is a
--- (possibly combined) error. If both values represent a success,
--- a combination is returned.
-chooseMinWith :: (Monoid a) => (b -> b' -> c)
-                            -> Either a b
-                            -> Either a b'
-                            -> Either a c
-chooseMinWith (><) (Right a) (Right b) = Right $ a >< b
-chooseMinWith  _   (Left  a) (Left  b) = Left  $ a <> b
-chooseMinWith  _   (Left  a)     _     = Left  a
-chooseMinWith  _       _     (Left  b) = Left  b
-
 -- | If either of the values represents a  non-error, the result is a
 -- (possibly combined) non-error. If both values represent an error, an error
 -- is returned.
@@ -152,87 +110,11 @@ chooseMaxWith  _       _     (Right b) = Right b
 class ChoiceVector v where
   spreadChoice :: v (Either f a) -> Either f (v a)
 
--- Let's do a few examples first
-
-instance ChoiceVector Maybe where
-  spreadChoice (Just (Left  f))  = Left  f
-  spreadChoice (Just (Right x))  = Right (Just x)
-  spreadChoice Nothing           = Right Nothing
-
-instance ChoiceVector (Either l) where
-  spreadChoice (Right (Left  f)) = Left  f
-  spreadChoice (Right (Right x)) = Right (Right x)
-  spreadChoice (Left   x       ) = Right (Left x)
-
 instance ChoiceVector ((,) a) where
   spreadChoice (_, Left  f) = Left  f
   spreadChoice (x, Right y) = Right (x,y)
   -- Wasn't there a newtype somewhere with the elements flipped?
 
---
--- More instances later, first some discussion.
---
--- I'll have to freshen up on type system details to see how (or if) to do
--- something like
---
--- > instance (ChoiceVector a, ChoiceVector b) => ChoiceVector (a b) where
--- >   :
---
--- But maybe it would be even better to use something like
---
--- > class ChoiceVector v v' f | v -> v' f where
--- >   spreadChoice :: v -> Either f v'
---
--- That way, more places in @v@ could spread the cheer, e.g.:
---
--- As before:
--- --                       ( a , Either f b)    (a , b)  f
--- > instance ChoiceVector ((,) a (Either f b)) ((,) a b) f where
--- >   spreadChoice (_, Left  f) = Left f
--- >   spreadChoice (a, Right b) = Right (a,b)
---
--- But also:
--- --                       ( Either f a , b)    (a , b)  f
--- > instance ChoiceVector ((,) (Either f a) b) ((,) a b) f where
--- >   spreadChoice (Right a,b) = Right (a,b)
--- >   spreadChoice (Left  f,_) = Left f
---
--- And maybe even:
--- --                        ( Either f a , Either f b)     (a , b)  f
--- > instance ChoiceVector ((,) (Either f a) (Either f b)) ((,) a b) f where
--- >   spreadChoice (Right a , Right b) = Right (a,b)
--- >   spreadChoice (Left  f , _      ) = Left f
--- >   spreadChoice ( _      , Left  f) = Left f
---
--- Of course that would lead to a lot of overlapping instances...
--- But I can't think of a different way. A selector function might help,
--- but not even a "Data.Traversable" is powerful enough for that.
--- But maybe someone has already solved all this with a lens library.
---
--- Well, it's an interesting academic question. But for practical purposes,
--- I have more than enough right now.
-
-instance ChoiceVector ((,,) a b) where
-  spreadChoice (_,_, Left  f) = Left  f
-  spreadChoice (a,b, Right x) = Right (a,b,x)
-
-instance ChoiceVector ((,,,) a b c) where
-  spreadChoice (_,_,_, Left  f) = Left  f
-  spreadChoice (a,b,c, Right x) = Right (a,b,c,x)
-
-instance ChoiceVector ((,,,,) a b c d) where
-  spreadChoice (_,_,_,_, Left  f) = Left  f
-  spreadChoice (a,b,c,d, Right x) = Right (a,b,c,d,x)
-
-instance ChoiceVector (Const a) where
-  spreadChoice (Const c) = Right (Const c) -- need to repackage because of implicit types
-
--- | Fails on the first error
-instance ChoiceVector [] where
-  spreadChoice = sequence -- using the monad instance of Either.
-  -- Could be generalized to "Data.Traversable" - but why play
-  -- with UndecidableInstances unless this is really needed.
-
 -- | Wrapper for a list. While the normal list instance of 'ChoiceVector'
 -- fails whenever it can, this type will never fail.
 newtype SuccessList a = SuccessList { collectNonFailing :: [a] }
@@ -247,14 +129,3 @@ instance ChoiceVector SuccessList  where
 collectRights :: [Either _l r] -> [r]
 collectRights = collectNonFailing . untag . spreadChoice . SuccessList
   where untag = fromLeft (error "Unexpected Left")
-
--- | A version of 'collectRights' generalized to other containers. The
--- container must be both "reducible" and "buildable". Most general containers
--- should fullfill these requirements, but there is no single typeclass
--- (that I know of) for that.
--- Therefore, they are split between 'Foldable' and 'MonadPlus'.
--- (Note that 'Data.Traversable.Traversable' alone would not be enough, either.)
-collectRightsF :: (F.Foldable c, MonadPlus c) => c (Either _l r) ->  c r
-collectRightsF = F.foldr unTagRight mzero
-  where unTagRight (Right x) = mplus $ return x
-        unTagRight _         = id
diff --git a/src/Text/Pandoc/Readers/Odt/Generic/Utils.hs b/src/Text/Pandoc/Readers/Odt/Generic/Utils.hs
index 6c10ed61d..4af4242b6 100644
--- a/src/Text/Pandoc/Readers/Odt/Generic/Utils.hs
+++ b/src/Text/Pandoc/Readers/Odt/Generic/Utils.hs
@@ -38,8 +38,6 @@ module Text.Pandoc.Readers.Odt.Generic.Utils
 , uncurry4
 , uncurry5
 , uncurry6
-, uncurry7
-, uncurry8
 , swap
 , reverseComposition
 , bool
@@ -148,15 +146,11 @@ uncurry3 :: (a->b->c                -> z) -> (a,b,c          ) -> z
 uncurry4 :: (a->b->c->d             -> z) -> (a,b,c,d        ) -> z
 uncurry5 :: (a->b->c->d->e          -> z) -> (a,b,c,d,e      ) -> z
 uncurry6 :: (a->b->c->d->e->f       -> z) -> (a,b,c,d,e,f    ) -> z
-uncurry7 :: (a->b->c->d->e->f->g    -> z) -> (a,b,c,d,e,f,g  ) -> z
-uncurry8 :: (a->b->c->d->e->f->g->h -> z) -> (a,b,c,d,e,f,g,h) -> z
 
 uncurry3 fun (a,b,c          ) = fun a b c
 uncurry4 fun (a,b,c,d        ) = fun a b c d
 uncurry5 fun (a,b,c,d,e      ) = fun a b c d e
 uncurry6 fun (a,b,c,d,e,f    ) = fun a b c d e f
-uncurry7 fun (a,b,c,d,e,f,g  ) = fun a b c d e f g
-uncurry8 fun (a,b,c,d,e,f,g,h) = fun a b c d e f g h
 
 swap :: (a,b) -> (b,a)
 swap (a,b) = (b,a)
@@ -168,4 +162,3 @@ findBy :: (a -> Maybe b) -> [a] -> Maybe b
 findBy _               []   = Nothing
 findBy f ((f -> Just x):_ ) = Just x
 findBy f (            _:xs) = findBy f xs
-
diff --git a/src/Text/Pandoc/Readers/Odt/Generic/XMLConverter.hs b/src/Text/Pandoc/Readers/Odt/Generic/XMLConverter.hs
index 8c03d1a09..1c3e08a7f 100644
--- a/src/Text/Pandoc/Readers/Odt/Generic/XMLConverter.hs
+++ b/src/Text/Pandoc/Readers/Odt/Generic/XMLConverter.hs
@@ -41,50 +41,17 @@ module Text.Pandoc.Readers.Odt.Generic.XMLConverter
 , XMLConverterState
 , XMLConverter
 , FallibleXMLConverter
-, swapPosition
-, runConverter
-, runConverter''
 , runConverter'
-, runConverterF'
-, runConverterF
-, getCurrentElement
 , getExtraState
 , setExtraState
 , modifyExtraState
-, convertingExtraState
 , producingExtraState
-, lookupNSiri
-, lookupNSprefix
-, readNSattributes
-, elemName
-, elemNameIs
-, strContent
-, elContent
-, currentElem
-, currentElemIs
-, expectElement
-, elChildren
-, findChildren
-, filterChildren
-, filterChildrenName
 , findChild'
-, findChild
-, filterChild'
-, filterChild
-, filterChildName'
-, filterChildName
-, isSet
 , isSet'
 , isSetWithDefault
-, hasAttrValueOf'
-, failIfNotAttrValueOf
-, isThatTheAttrValue
-, searchAttrIn
-, searchAttrWith
 , searchAttr
 , lookupAttr
 , lookupAttr'
-, lookupAttrWithDefault
 , lookupDefaultingAttr
 , findAttr'
 , findAttr
@@ -93,25 +60,9 @@ module Text.Pandoc.Readers.Odt.Generic.XMLConverter
 , readAttr'
 , readAttrWithDefault
 , getAttr
--- , (>/<)
--- , (?>/<)
 , executeIn
-, collectEvery
 , withEveryL
-, withEvery
 , tryAll
-, tryAll'
-, IdXMLConverter
-, MaybeEConverter
-, ElementMatchConverter
-, MaybeCConverter
-, ContentMatchConverter
-, makeMatcherE
-, makeMatcherC
-, prepareMatchersE
-, prepareMatchersC
-, matchChildren
-, matchContent''
 , matchContent'
 , matchContent
 ) where
@@ -121,7 +72,6 @@ import           Control.Monad               ( MonadPlus )
 import           Control.Arrow
 
 import qualified Data.Map             as M
-import qualified Data.Foldable        as F
 import           Data.Default
 import           Data.Maybe
 
@@ -210,17 +160,6 @@ currentElement state = head (parentElements state)
 
 -- | Replace the current position by another, modifying the extra state
 -- in the process
-swapPosition        :: (extraState -> extraState')
-                    -> [XML.Element]
-                    -> XMLConverterState nsID extraState
-                    -> XMLConverterState nsID extraState'
-swapPosition f stack state
-                     = state { parentElements = stack
-                             , moreState      = f (moreState state)
-                             }
-
--- | Replace the current position by another, modifying the extra state
--- in the process
 swapStack'          :: XMLConverterState nsID extraState
                     -> [XML.Element]
                     -> ( XMLConverterState nsID extraState , [XML.Element] )
@@ -264,14 +203,6 @@ runConverter     :: XMLConverter nsID extraState input output
                  -> output
 runConverter converter state input = snd $ runArrowState converter (state,input)
 
---
-runConverter''    :: (NameSpaceID nsID)
-                 => XMLConverter nsID extraState (Fallible ()) output
-                 -> extraState
-                 -> XML.Element
-                 -> output
-runConverter'' converter extraState element = runConverter (readNSattributes >>> converter) (createStartState element extraState) ()
-
 runConverter' :: (NameSpaceID nsID)
               => FallibleXMLConverter nsID extraState () success
               -> extraState
@@ -280,20 +211,6 @@ runConverter' :: (NameSpaceID nsID)
 runConverter' converter extraState element = runConverter (readNSattributes >>? converter) (createStartState element extraState) ()
 
 --
-runConverterF' :: FallibleXMLConverter nsID extraState x y
-              -> XMLConverterState nsID extraState
-              -> Fallible x -> Fallible y
-runConverterF' a s e = runConverter (returnV e >>? a) s e
-
---
-runConverterF :: (NameSpaceID nsID)
-              => FallibleXMLConverter nsID extraState XML.Element x
-              -> extraState
-              -> Fallible XML.Element -> Fallible x
-runConverterF a s = either failWith
-                           (\e -> runConverter a (createStartState e s) e)
-
---
 getCurrentElement :: XMLConverter nsID extraState x XML.Element
 getCurrentElement  = extractFromState currentElement
 
@@ -430,57 +347,15 @@ elemNameIs nsID name     = keepingTheValue (lookupNSiri nsID) >>% hasThatName
 --------------------------------------------------------------------------------
 
 --
-strContent               :: XMLConverter nsID extraState x String
-strContent               =     getCurrentElement
-                           >>^ XML.strContent
-
---
 elContent               :: XMLConverter nsID extraState x [XML.Content]
 elContent               =     getCurrentElement
                            >>^ XML.elContent
 
 --------------------------------------------------------------------------------
--- Current element
---------------------------------------------------------------------------------
-
---
-currentElem              :: XMLConverter nsID extraState x (XML.QName)
-currentElem              =     getCurrentElement
-                           >>^ XML.elName
-
-currentElemIs            :: (NameSpaceID nsID)
-                         => nsID -> ElementName
-                         -> XMLConverter nsID extraState x Bool
-currentElemIs nsID name  =     getCurrentElement
-                           >>> elemNameIs nsID name
-
-
-
-{-
-currentElemIs'' nsID name = ( (getCurrentElement >>^ XML.elName >>>
-                                (XML.qName >>^ (&&).(== name) )
-                                  ^&&&^
-                                (XML.qIRI  >>^ (==) )
-                              ) >>% (.)
-                            ) &&& lookupNSiri nsID >>% ($)
--}
-
---
-expectElement            :: (NameSpaceID nsID)
-                         => nsID -> ElementName
-                         -> FallibleXMLConverter nsID extraState x ()
-expectElement nsID name  =     currentElemIs nsID name
-                           >>^ boolToChoice
-
---------------------------------------------------------------------------------
 -- Chilren
 --------------------------------------------------------------------------------
 
 --
-elChildren               :: XMLConverter nsID extraState x [XML.Element]
-elChildren               =     getCurrentElement
-                           >>^ XML.elChildren
-
 --
 findChildren             :: (NameSpaceID nsID)
                          => nsID -> ElementName
@@ -490,18 +365,6 @@ findChildren nsID name   =         elemName nsID name
                            >>% XML.findChildren
 
 --
-filterChildren           :: (XML.Element -> Bool)
-                         -> XMLConverter nsID extraState x [XML.Element]
-filterChildren p         =     getCurrentElement
-                           >>^ XML.filterChildren p
-
---
-filterChildrenName       :: (XML.QName   -> Bool)
-                         -> XMLConverter nsID extraState x [XML.Element]
-filterChildrenName p     =     getCurrentElement
-                           >>^ XML.filterChildrenName p
-
---
 findChild'              :: (NameSpaceID nsID)
                         => nsID
                         -> ElementName
@@ -517,45 +380,12 @@ findChild              :: (NameSpaceID nsID)
 findChild nsID name    =     findChild' nsID name
                          >>> maybeToChoice
 
---
-filterChild'            :: (XML.Element -> Bool)
-                        -> XMLConverter nsID extraState x (Maybe XML.Element)
-filterChild' p          =     getCurrentElement
-                          >>^ XML.filterChild p
-
---
-filterChild            :: (XML.Element -> Bool)
-                       -> FallibleXMLConverter nsID extraState x XML.Element
-filterChild p          =     filterChild' p
-                         >>> maybeToChoice
-
---
-filterChildName'        :: (XML.QName   -> Bool)
-                        -> XMLConverter nsID extraState x (Maybe XML.Element)
-filterChildName' p      =     getCurrentElement
-                          >>^ XML.filterChildName p
-
---
-filterChildName        :: (XML.QName   -> Bool)
-                       -> FallibleXMLConverter nsID extraState x XML.Element
-filterChildName p      =     filterChildName' p
-                         >>> maybeToChoice
-
 
 --------------------------------------------------------------------------------
 -- Attributes
 --------------------------------------------------------------------------------
 
 --
-isSet                    :: (NameSpaceID nsID)
-                         => nsID -> AttributeName
-                         -> (Either Failure Bool)
-                         -> FallibleXMLConverter nsID extraState x Bool
-isSet nsID attrName deflt
-                         =      findAttr' nsID attrName
-                            >>^ maybe deflt stringToBool
-
---
 isSet'                   :: (NameSpaceID nsID)
                          => nsID -> AttributeName
                          -> XMLConverter nsID extraState x (Maybe Bool)
@@ -570,34 +400,6 @@ isSetWithDefault nsID attrName def'
                          =     isSet' nsID attrName
                            >>^ fromMaybe def'
 
---
-hasAttrValueOf'          :: (NameSpaceID nsID)
-                         => nsID -> AttributeName
-                         -> AttributeValue
-                         -> XMLConverter nsID extraState x Bool
-hasAttrValueOf' nsID attrName attrValue
-                         =     findAttr nsID attrName
-                           >>> ( const False ^|||^ (==attrValue))
-
---
-failIfNotAttrValueOf     :: (NameSpaceID nsID)
-                         => nsID -> AttributeName
-                         -> AttributeValue
-                         -> FallibleXMLConverter nsID extraState x ()
-failIfNotAttrValueOf nsID attrName attrValue
-                         =     hasAttrValueOf' nsID attrName attrValue
-                           >>^ boolToChoice
-
--- | Is the value that is currently transported in the arrow the value of
--- the specified attribute?
-isThatTheAttrValue       :: (NameSpaceID nsID)
-                         => nsID -> AttributeName
-                         -> FallibleXMLConverter nsID extraState AttributeValue Bool
-isThatTheAttrValue nsID attrName
-                         =     keepingTheValue
-                                 (findAttr nsID attrName)
-                           >>% right.(==)
-
 -- | Lookup value in a dictionary, fail if no attribute found or value
 -- not in dictionary
 searchAttrIn             :: (NameSpaceID nsID)
@@ -608,18 +410,6 @@ searchAttrIn nsID attrName dict
                          =       findAttr nsID attrName
                            >>?^? maybeToChoice.(`lookup` dict )
 
-
--- | Lookup value in a dictionary. Fail if no attribute found. If value not in
--- dictionary, return default value
-searchAttrWith           :: (NameSpaceID nsID)
-                         => nsID -> AttributeName
-                         -> a
-                         -> [(AttributeValue,a)]
-                         -> FallibleXMLConverter nsID extraState x a
-searchAttrWith nsID attrName defV dict
-                         =      findAttr nsID attrName
-                           >>?^ (fromMaybe defV).(`lookup` dict )
-
 -- | Lookup value in a dictionary. If attribute or value not found,
 -- return default value
 searchAttr               :: (NameSpaceID nsID)
@@ -789,16 +579,6 @@ prepareIteration nsID name =     keepingTheValue
                                    (findChildren nsID name)
                              >>% distributeValue
 
--- | Applies a converter to every child element of a specific type.
--- Collects results in a 'Monoid'.
--- Fails completely if any conversion fails.
-collectEvery           :: (NameSpaceID nsID, Monoid m)
-                       => nsID -> ElementName
-                       -> FallibleXMLConverter nsID extraState a m
-                       -> FallibleXMLConverter nsID extraState a m
-collectEvery nsID name a   =     prepareIteration nsID name
-                             >>> foldS' (switchingTheStack a)
-
 --
 withEveryL             :: (NameSpaceID nsID)
                        => nsID -> ElementName
@@ -826,16 +606,6 @@ tryAll nsID name a         =     prepareIteration nsID name
                              >>> iterateS (switchingTheStack a)
                              >>^ collectRights
 
--- | Applies a converter to every child element of a specific type.
--- Collects all successful results.
-tryAll'                 :: (NameSpaceID nsID, F.Foldable c, MonadPlus c)
-                        => nsID -> ElementName
-                        -> FallibleXMLConverter nsID extraState b   a
-                        ->         XMLConverter nsID extraState b (c a)
-tryAll' nsID name a         =     prepareIteration nsID name
-                              >>> iterateS (switchingTheStack a)
-                              >>^ collectRightsF
-
 --------------------------------------------------------------------------------
 -- Matching children
 --------------------------------------------------------------------------------
@@ -843,15 +613,6 @@ tryAll' nsID name a         =     prepareIteration nsID name
 type IdXMLConverter nsID moreState x
    = XMLConverter   nsID moreState x x
 
-type MaybeEConverter nsID moreState x
-   = Maybe (IdXMLConverter nsID moreState (x, XML.Element))
-
--- Chainable converter that helps deciding which converter to actually use.
-type ElementMatchConverter nsID extraState x
-   = IdXMLConverter  nsID
-                     extraState
-                     (MaybeEConverter nsID extraState x, XML.Element)
-
 type MaybeCConverter nsID moreState x
    = Maybe (IdXMLConverter nsID moreState (x, XML.Content))
 
@@ -862,26 +623,6 @@ type ContentMatchConverter nsID extraState x
                      (MaybeCConverter nsID extraState x, XML.Content)
 
 -- Helper function: The @c@ is actually a converter that is to be selected by
--- matching XML elements to the first two parameters.
--- The fold used to match elements however is very simple, so to use it,
--- this function wraps the converter in another converter that unifies
--- the accumulator. Think of a lot of converters with the resulting type
--- chained together. The accumulator not only transports the element
--- unchanged to the next matcher, it also does the actual selecting by
--- combining the intermediate results with '(<|>)'.
-makeMatcherE           :: (NameSpaceID nsID)
-                       => nsID -> ElementName
-                       -> FallibleXMLConverter  nsID extraState a a
-                       -> ElementMatchConverter nsID extraState a
-makeMatcherE nsID name c = (     second (
-                                              elemNameIs nsID name
-                                          >>^ bool Nothing (Just tryC)
-                                        )
-                             >>% (<|>)
-                           ) &&&^ snd
-  where tryC = (fst ^&&& executeThere c >>% recover) &&&^ snd
-
--- Helper function: The @c@ is actually a converter that is to be selected by
 -- matching XML content to the first two parameters.
 -- The fold used to match elements however is very simple, so to use it,
 -- this function wraps the converter in another converter that unifies
@@ -914,13 +655,6 @@ makeMatcherC nsID name c = (    second (    contentToElem
                                      _           -> failEmpty
 
 -- Creates and chains a bunch of matchers
-prepareMatchersE       :: (NameSpaceID nsID)
-                       => [(nsID, ElementName, FallibleXMLConverter nsID extraState x x)]
-                       -> ElementMatchConverter nsID extraState x
---prepareMatchersE       = foldSs . (map $ uncurry3  makeMatcherE)
-prepareMatchersE       = reverseComposition . (map $ uncurry3  makeMatcherE)
-
--- Creates and chains a bunch of matchers
 prepareMatchersC      :: (NameSpaceID nsID)
                        => [(nsID, ElementName, FallibleXMLConverter nsID extraState x x)]
                        -> ContentMatchConverter nsID extraState x
@@ -928,52 +662,6 @@ prepareMatchersC      :: (NameSpaceID nsID)
 prepareMatchersC      = reverseComposition . (map $ uncurry3  makeMatcherC)
 
 -- | Takes a list of element-data - converter groups and
--- * Finds all children of the current element
--- * Matches each group to each child in order (at most one group per child)
--- * Filters non-matched children
--- * Chains all found converters in child-order
--- * Applies the chain to the input element
-matchChildren          :: (NameSpaceID nsID)
-                       => [(nsID, ElementName, FallibleXMLConverter nsID extraState a a)]
-                       -> XMLConverter nsID extraState a a
-matchChildren lookups  = let matcher = prepareMatchersE lookups
-                         in  keepingTheValue (
-                                   elChildren
-                               >>> map (Nothing,)
-                               ^>> iterateSL matcher
-                               >>^ catMaybes.map (\(m,e) -> fmap (swallowElem e) m)
-                              -- >>> foldSs
-                               >>> reverseComposition
-                             )
-                         >>> swap
-                         ^>> app
-  where
-        -- let the converter swallow the element and drop the element
-        -- in the return value
-        swallowElem element converter = (,element) ^>> converter >>^ fst
-
---
-matchContent''         :: (NameSpaceID nsID)
-                       => [(nsID, ElementName, FallibleXMLConverter nsID extraState a a)]
-                       -> XMLConverter nsID extraState a a
-matchContent'' lookups  = let matcher = prepareMatchersC lookups
-                          in  keepingTheValue (
-                                   elContent
-                               >>> map (Nothing,)
-                               ^>> iterateSL matcher
-                               >>^ catMaybes.map (\(m,c) -> fmap (swallowContent c) m)
-                              -- >>> foldSs
-                               >>> reverseComposition
-                             )
-                         >>> swap
-                         ^>> app
-  where
-        -- let the converter swallow the content and drop the content
-        -- in the return value
-        swallowContent content converter = (,content) ^>> converter >>^ fst
-
-
--- | Takes a list of element-data - converter groups and
 -- * Finds all content of the current element
 -- * Matches each group to each piece of content in order
 --   (at most one group per piece of content)
@@ -1018,14 +706,6 @@ matchContent lookups fallback
 -- Internals
 --------------------------------------------------------------------------------
 
-stringToBool :: (Monoid failure) => String -> Either failure Bool
-stringToBool val  -- stringToBool' val >>> maybeToChoice
-                 | val `elem` trueValues  = succeedWith True
-                 | val `elem` falseValues = succeedWith False
-                 | otherwise              = failEmpty
-  where trueValues  = ["true" ,"on" ,"1"]
-        falseValues = ["false","off","0"]
-
 stringToBool' :: String -> Maybe Bool
 stringToBool' val | val `elem` trueValues  = Just True
                   | val `elem` falseValues = Just False
diff --git a/src/Text/Pandoc/Readers/Odt/StyleReader.hs b/src/Text/Pandoc/Readers/Odt/StyleReader.hs
index 26ba6df82..87a6dc91c 100644
--- a/src/Text/Pandoc/Readers/Odt/StyleReader.hs
+++ b/src/Text/Pandoc/Readers/Odt/StyleReader.hs
@@ -50,23 +50,11 @@ module Text.Pandoc.Readers.Odt.StyleReader
 , ListLevelType        (..)
 , LengthOrPercent      (..)
 , lookupStyle
-, getTextProperty
-, getTextProperty'
-, getParaProperty
-, getListStyle
 , getListLevelStyle
 , getStyleFamily
-, lookupDefaultStyle
 , lookupDefaultStyle'
 , lookupListStyleByName
-, getPropertyChain
-, textPropertyChain
-, stylePropertyChain
-, stylePropertyChain'
-, getStylePropertyChain
 , extendedStylePropertyChain
-, extendedStylePropertyChain'
-, liftStyles
 , readStylesAt
 ) where
 
@@ -83,7 +71,6 @@ import           Data.Maybe
 
 import qualified Text.XML.Light                               as XML
 
-import           Text.Pandoc.Readers.Odt.Arrows.State
 import           Text.Pandoc.Readers.Odt.Arrows.Utils
 
 import           Text.Pandoc.Readers.Odt.Generic.Utils
@@ -624,20 +611,11 @@ lookupStyle           :: StyleName   -> Styles -> Maybe Style
 lookupStyle name Styles{..} = M.lookup name stylesByName
 
 --
-lookupDefaultStyle    :: StyleFamily -> Styles -> StyleProperties
-lookupDefaultStyle family Styles{..} = fromMaybe def
-                                       (M.lookup family defaultStyleMap)
-
---
 lookupDefaultStyle'   :: Styles -> StyleFamily -> StyleProperties
 lookupDefaultStyle' Styles{..} family = fromMaybe def
                                         (M.lookup family defaultStyleMap)
 
 --
-getListStyle          :: Style       -> Styles -> Maybe ListStyle
-getListStyle Style{..} styles = listStyle >>= (`lookupListStyleByName` styles)
-
---
 lookupListStyleByName :: StyleName   -> Styles -> Maybe ListStyle
 lookupListStyleByName name Styles{..} = M.lookup name listStylesByName
 
@@ -681,64 +659,3 @@ extendedStylePropertyChain [style]       styles =    (stylePropertyChain style s
                                                   ++ (maybeToList (fmap (lookupDefaultStyle' styles) (getStyleFamily style styles)))
 extendedStylePropertyChain (style:trace) styles =    (stylePropertyChain style styles)
                                                   ++ (extendedStylePropertyChain trace styles)
--- Optimizable with Data.Sequence
-
---
-extendedStylePropertyChain' :: [Style] -> Styles -> Maybe [StyleProperties]
-extendedStylePropertyChain' [] _ = Nothing
-extendedStylePropertyChain' [style]       styles = Just (
-                                                             (stylePropertyChain style styles)
-                                                          ++ (maybeToList (fmap (lookupDefaultStyle' styles) (getStyleFamily style styles)))
-                                                        )
-extendedStylePropertyChain' (style:trace) styles = fmap ((stylePropertyChain style styles) ++)
-                                                        (extendedStylePropertyChain' trace styles)
-
---
-stylePropertyChain'   :: Styles      -> Style  -> [StyleProperties]
-stylePropertyChain' = flip stylePropertyChain
-
---
-getStylePropertyChain :: StyleName   -> Styles -> [StyleProperties]
-getStylePropertyChain name styles = maybe []
-                                          (`stylePropertyChain` styles)
-                                          (lookupStyle name styles)
-
---
-getPropertyChain :: (StyleProperties -> Maybe a) -> Style -> Styles ->     [a]
-getPropertyChain extract style styles = catMaybes
-                                      $ map extract
-                                      $ stylePropertyChain style styles
-
---
-textPropertyChain     :: Style       -> Styles -> [TextProperties]
-textPropertyChain = getPropertyChain textProperties
-
---
-paraPropertyChain     :: Style       -> Styles -> [ParaProperties]
-paraPropertyChain = getPropertyChain paraProperties
-
---
-getTextProperty   :: (TextProperties ->       a) -> Style -> Styles -> Maybe a
-getTextProperty extract style styles  = fmap extract
-                                      $ listToMaybe
-                                      $ textPropertyChain style styles
-
---
-getTextProperty'  :: (TextProperties -> Maybe a) -> Style -> Styles -> Maybe a
-getTextProperty' extract style styles = F.asum
-                                      $ map extract
-                                      $ textPropertyChain style styles
-
---
-getParaProperty   :: (ParaProperties ->       a) -> Style -> Styles -> Maybe a
-getParaProperty extract style styles  = fmap extract
-                                      $ listToMaybe
-                                      $ paraPropertyChain style styles
-
--- | Lifts the reader into another readers' state.
-liftStyles :: (OdtConverterState s      -> OdtConverterState Styles)
-           -> (OdtConverterState Styles -> OdtConverterState s     )
-           -> XMLReader s x x
-liftStyles extract inject = switchState extract inject
-                          $ convertingExtraState M.empty readAllStyles
-