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<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE CPP #-}</span>
<a name="line-2"></a><span class='hs-comment'>{-# OPTIONS_HADDOCK hide #-}</span>
<a name="line-3"></a><span class='hs-comment'>-- #hide</span>
<a name="line-4"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-5"></a><span class='hs-comment'>-- |</span>
<a name="line-6"></a><span class='hs-comment'>-- Module : Data.Sequence</span>
<a name="line-7"></a><span class='hs-comment'>-- Copyright : (c) Ross Paterson 2005</span>
<a name="line-8"></a><span class='hs-comment'>-- License : BSD-style</span>
<a name="line-9"></a><span class='hs-comment'>-- Maintainer : ross@soi.city.ac.uk</span>
<a name="line-10"></a><span class='hs-comment'>-- Stability : experimental</span>
<a name="line-11"></a><span class='hs-comment'>-- Portability : portable</span>
<a name="line-12"></a><span class='hs-comment'>--</span>
<a name="line-13"></a><span class='hs-comment'>-- General purpose finite sequences.</span>
<a name="line-14"></a><span class='hs-comment'>-- Apart from being finite and having strict operations, sequences</span>
<a name="line-15"></a><span class='hs-comment'>-- also differ from lists in supporting a wider variety of operations</span>
<a name="line-16"></a><span class='hs-comment'>-- efficiently.</span>
<a name="line-17"></a><span class='hs-comment'>--</span>
<a name="line-18"></a><span class='hs-comment'>-- An amortized running time is given for each operation, with /n/ referring</span>
<a name="line-19"></a><span class='hs-comment'>-- to the length of the sequence and /i/ being the integral index used by</span>
<a name="line-20"></a><span class='hs-comment'>-- some operations. These bounds hold even in a persistent (shared) setting.</span>
<a name="line-21"></a><span class='hs-comment'>--</span>
<a name="line-22"></a><span class='hs-comment'>-- The implementation uses 2-3 finger trees annotated with sizes,</span>
<a name="line-23"></a><span class='hs-comment'>-- as described in section 4.2 of</span>
<a name="line-24"></a><span class='hs-comment'>--</span>
<a name="line-25"></a><span class='hs-comment'>-- * Ralf Hinze and Ross Paterson,</span>
<a name="line-26"></a><span class='hs-comment'>-- \"Finger trees: a simple general-purpose data structure\",</span>
<a name="line-27"></a><span class='hs-comment'>-- submitted to /Journal of Functional Programming/.</span>
<a name="line-28"></a><span class='hs-comment'>-- <<a href="http://www.soi.city.ac.uk/~ross/papers/FingerTree.html">http://www.soi.city.ac.uk/~ross/papers/FingerTree.html</a>></span>
<a name="line-29"></a><span class='hs-comment'>--</span>
<a name="line-30"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-31"></a>
<a name="line-32"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Graphics</span><span class='hs-varop'>.</span><span class='hs-conid'>UI</span><span class='hs-varop'>.</span><span class='hs-conid'>Gtk</span><span class='hs-varop'>.</span><span class='hs-conid'>ModelView</span><span class='hs-varop'>.</span><span class='hs-conid'>Sequence</span> <span class='hs-layout'>(</span>
<a name="line-33"></a> <span class='hs-conid'>Seq</span><span class='hs-layout'>,</span>
<a name="line-34"></a> <span class='hs-comment'>-- * Construction</span>
<a name="line-35"></a> <span class='hs-varid'>empty</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Seq a</span>
<a name="line-36"></a> <span class='hs-varid'>singleton</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: a -> Seq a</span>
<a name="line-37"></a> <span class='hs-layout'>(</span><span class='hs-varop'><|</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: a -> Seq a -> Seq a</span>
<a name="line-38"></a> <span class='hs-layout'>(</span><span class='hs-varop'>|></span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Seq a -> a -> Seq a</span>
<a name="line-39"></a> <span class='hs-layout'>(</span><span class='hs-varop'>><</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Seq a -> Seq a -> Seq a</span>
<a name="line-40"></a> <span class='hs-comment'>-- * Deconstruction</span>
<a name="line-41"></a> <span class='hs-varid'>null</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Seq a -> Bool</span>
<a name="line-42"></a> <span class='hs-comment'>-- ** Views</span>
<a name="line-43"></a> <span class='hs-conid'>ViewL</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-44"></a> <span class='hs-varid'>viewl</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Seq a -> ViewL a</span>
<a name="line-45"></a> <span class='hs-conid'>ViewR</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span>
<a name="line-46"></a> <span class='hs-varid'>viewr</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Seq a -> ViewR a</span>
<a name="line-47"></a> <span class='hs-comment'>-- ** Indexing</span>
<a name="line-48"></a> <span class='hs-varid'>length</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Seq a -> Int</span>
<a name="line-49"></a> <span class='hs-varid'>index</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Seq a -> Int -> a</span>
<a name="line-50"></a> <span class='hs-varid'>adjust</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: (a -> a) -> Int -> Seq a -> Seq a</span>
<a name="line-51"></a> <span class='hs-varid'>update</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Int -> a -> Seq a -> Seq a</span>
<a name="line-52"></a> <span class='hs-varid'>take</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Int -> Seq a -> Seq a</span>
<a name="line-53"></a> <span class='hs-varid'>drop</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Int -> Seq a -> Seq a</span>
<a name="line-54"></a> <span class='hs-varid'>splitAt</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Int -> Seq a -> (Seq a, Seq a)</span>
<a name="line-55"></a> <span class='hs-comment'>-- * Lists</span>
<a name="line-56"></a> <span class='hs-varid'>fromList</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: [a] -> Seq a</span>
<a name="line-57"></a> <span class='hs-varid'>toList</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Seq a -> [a]</span>
<a name="line-58"></a> <span class='hs-comment'>-- * Folds</span>
<a name="line-59"></a> <span class='hs-comment'>-- ** Right associative</span>
<a name="line-60"></a> <span class='hs-varid'>foldr</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: (a -> b -> b) -> b -> Seq a -> b</span>
<a name="line-61"></a> <span class='hs-varid'>foldr1</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: (a -> a -> a) -> Seq a -> a</span>
<a name="line-62"></a> <span class='hs-varid'>foldr'</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: (a -> b -> b) -> b -> Seq a -> b</span>
<a name="line-63"></a> <span class='hs-varid'>foldrM</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Monad m => (a -> b -> m b) -> b -> Seq a -> m b</span>
<a name="line-64"></a> <span class='hs-comment'>-- ** Left associative</span>
<a name="line-65"></a> <span class='hs-varid'>foldl</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: (a -> b -> a) -> a -> Seq b -> a</span>
<a name="line-66"></a> <span class='hs-varid'>foldl1</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: (a -> a -> a) -> Seq a -> a</span>
<a name="line-67"></a> <span class='hs-varid'>foldl'</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: (a -> b -> a) -> a -> Seq b -> a</span>
<a name="line-68"></a> <span class='hs-varid'>foldlM</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Monad m => (a -> b -> m a) -> a -> Seq b -> m a</span>
<a name="line-69"></a> <span class='hs-comment'>-- * Transformations</span>
<a name="line-70"></a> <span class='hs-varid'>reverse</span><span class='hs-layout'>,</span> <span class='hs-comment'>-- :: Seq a -> Seq a</span>
<a name="line-71"></a><span class='hs-cpp'>#if TESTING</span>
<a name="line-72"></a> <span class='hs-varid'>valid</span><span class='hs-layout'>,</span>
<a name="line-73"></a><span class='hs-cpp'>#endif</span>
<a name="line-74"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-75"></a>
<a name="line-76"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Prelude</span> <span class='hs-varid'>hiding</span> <span class='hs-layout'>(</span>
<a name="line-77"></a> <span class='hs-varid'>null</span><span class='hs-layout'>,</span> <span class='hs-varid'>length</span><span class='hs-layout'>,</span> <span class='hs-varid'>take</span><span class='hs-layout'>,</span> <span class='hs-varid'>drop</span><span class='hs-layout'>,</span> <span class='hs-varid'>splitAt</span><span class='hs-layout'>,</span> <span class='hs-varid'>foldl</span><span class='hs-layout'>,</span> <span class='hs-varid'>foldl1</span><span class='hs-layout'>,</span> <span class='hs-varid'>foldr</span><span class='hs-layout'>,</span> <span class='hs-varid'>foldr1</span><span class='hs-layout'>,</span>
<a name="line-78"></a> <span class='hs-varid'>reverse</span><span class='hs-layout'>)</span>
<a name="line-79"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Prelude</span> <span class='hs-layout'>(</span><span class='hs-varid'>foldr</span><span class='hs-layout'>)</span>
<a name="line-80"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span> <span class='hs-layout'>(</span><span class='hs-varid'>intersperse</span><span class='hs-layout'>)</span>
<a name="line-81"></a><span class='hs-keyword'>import</span> <span class='hs-keyword'>qualified</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span> <span class='hs-layout'>(</span><span class='hs-varid'>foldl'</span><span class='hs-layout'>)</span>
<a name="line-82"></a>
<a name="line-83"></a><span class='hs-cpp'>#if TESTING</span>
<a name="line-84"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span> <span class='hs-layout'>(</span><span class='hs-varid'>liftM</span><span class='hs-layout'>,</span> <span class='hs-varid'>liftM2</span><span class='hs-layout'>,</span> <span class='hs-varid'>liftM3</span><span class='hs-layout'>,</span> <span class='hs-varid'>liftM4</span><span class='hs-layout'>)</span>
<a name="line-85"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Test</span><span class='hs-varop'>.</span><span class='hs-conid'>QuickCheck</span>
<a name="line-86"></a><span class='hs-cpp'>#endif</span>
<a name="line-87"></a>
<a name="line-88"></a><span class='hs-keyword'>infixr</span> <span class='hs-num'>5</span> <span class='hs-varop'>`consTree`</span>
<a name="line-89"></a><span class='hs-keyword'>infixl</span> <span class='hs-num'>5</span> <span class='hs-varop'>`snocTree`</span>
<a name="line-90"></a>
<a name="line-91"></a><span class='hs-keyword'>infixr</span> <span class='hs-num'>5</span> <span class='hs-varop'>><</span>
<a name="line-92"></a><span class='hs-keyword'>infixr</span> <span class='hs-num'>5</span> <span class='hs-varop'><|</span><span class='hs-layout'>,</span> <span class='hs-conop'>:<</span>
<a name="line-93"></a><span class='hs-keyword'>infixl</span> <span class='hs-num'>5</span> <span class='hs-varop'>|></span><span class='hs-layout'>,</span> <span class='hs-conop'>:></span>
<a name="line-94"></a>
<a name="line-95"></a><a name="Sized"></a><span class='hs-keyword'>class</span> <span class='hs-conid'>Sized</span> <span class='hs-varid'>a</span> <span class='hs-keyword'>where</span>
<a name="line-96"></a> <span class='hs-varid'>size</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span>
<a name="line-97"></a>
<a name="line-98"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-99"></a><span class='hs-comment'>-- Random access sequences</span>
<a name="line-100"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-101"></a>
<a name="line-102"></a><a name="Seq"></a><span class='hs-comment'>-- | General-purpose finite sequences.</span>
<a name="line-103"></a><a name="Seq"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Seq</span> <span class='hs-layout'>(</span><span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Elem</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-104"></a>
<a name="line-105"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Functor</span> <span class='hs-conid'>Seq</span> <span class='hs-keyword'>where</span>
<a name="line-106"></a> <span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Seq</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Seq</span> <span class='hs-layout'>(</span><span class='hs-varid'>fmap</span> <span class='hs-layout'>(</span><span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span>
<a name="line-107"></a>
<a name="line-108"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Eq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Eq</span> <span class='hs-layout'>(</span><span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-109"></a> <span class='hs-varid'>xs</span> <span class='hs-varop'>==</span> <span class='hs-varid'>ys</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>length</span> <span class='hs-varid'>xs</span> <span class='hs-varop'>==</span> <span class='hs-varid'>length</span> <span class='hs-varid'>ys</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>toList</span> <span class='hs-varid'>xs</span> <span class='hs-varop'>==</span> <span class='hs-varid'>toList</span> <span class='hs-varid'>ys</span>
<a name="line-110"></a>
<a name="line-111"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Ord</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Ord</span> <span class='hs-layout'>(</span><span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-112"></a> <span class='hs-varid'>compare</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>ys</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>compare</span> <span class='hs-layout'>(</span><span class='hs-varid'>toList</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>toList</span> <span class='hs-varid'>ys</span><span class='hs-layout'>)</span>
<a name="line-113"></a>
<a name="line-114"></a><span class='hs-cpp'>#if TESTING</span>
<a name="line-115"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>Show</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Show</span> <span class='hs-layout'>(</span><span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-116"></a> <span class='hs-varid'>showsPrec</span> <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-conid'>Seq</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>showsPrec</span> <span class='hs-varid'>p</span> <span class='hs-varid'>x</span>
<a name="line-117"></a><span class='hs-cpp'>#else</span>
<a name="line-118"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Show</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Show</span> <span class='hs-layout'>(</span><span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-119"></a> <span class='hs-varid'>showsPrec</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>showChar</span> <span class='hs-chr'>'<'</span> <span class='hs-varop'>.</span>
<a name="line-120"></a> <span class='hs-varid'>flip</span> <span class='hs-layout'>(</span><span class='hs-conid'>Prelude</span><span class='hs-varop'>.</span><span class='hs-varid'>foldr</span> <span class='hs-layout'>(</span><span class='hs-varop'>$</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>intersperse</span> <span class='hs-layout'>(</span><span class='hs-varid'>showChar</span> <span class='hs-chr'>','</span><span class='hs-layout'>)</span>
<a name="line-121"></a> <span class='hs-layout'>(</span><span class='hs-varid'>map</span> <span class='hs-varid'>shows</span> <span class='hs-layout'>(</span><span class='hs-varid'>toList</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varop'>.</span>
<a name="line-122"></a> <span class='hs-varid'>showChar</span> <span class='hs-chr'>'>'</span>
<a name="line-123"></a><span class='hs-cpp'>#endif</span>
<a name="line-124"></a>
<a name="line-125"></a><span class='hs-comment'>-- Finger trees</span>
<a name="line-126"></a>
<a name="line-127"></a><a name="FingerTree"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>FingerTree</span> <span class='hs-varid'>a</span>
<a name="line-128"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Empty</span>
<a name="line-129"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Single</span> <span class='hs-varid'>a</span>
<a name="line-130"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Deep</span> <span class='hs-comment'>{-# UNPACK #-}</span> <span class='hs-varop'>!</span><span class='hs-conid'>Int</span> <span class='hs-varop'>!</span><span class='hs-layout'>(</span><span class='hs-conid'>Digit</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varop'>!</span><span class='hs-layout'>(</span><span class='hs-conid'>Digit</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-131"></a><span class='hs-cpp'>#if TESTING</span>
<a name="line-132"></a> <span class='hs-keyword'>deriving</span> <span class='hs-conid'>Show</span>
<a name="line-133"></a><span class='hs-cpp'>#endif</span>
<a name="line-134"></a>
<a name="line-135"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Sized</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Sized</span> <span class='hs-layout'>(</span><span class='hs-conid'>FingerTree</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-136"></a> <span class='hs-varid'>size</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>0</span>
<a name="line-137"></a> <span class='hs-varid'>size</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>size</span> <span class='hs-varid'>x</span>
<a name="line-138"></a> <span class='hs-varid'>size</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-varid'>v</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>v</span>
<a name="line-139"></a>
<a name="line-140"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Functor</span> <span class='hs-conid'>FingerTree</span> <span class='hs-keyword'>where</span>
<a name="line-141"></a> <span class='hs-varid'>fmap</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Empty</span>
<a name="line-142"></a> <span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Single</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span>
<a name="line-143"></a> <span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-varid'>v</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m</span> <span class='hs-varid'>sf</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-144"></a> <span class='hs-conid'>Deep</span> <span class='hs-varid'>v</span> <span class='hs-layout'>(</span><span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-varid'>pr</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>fmap</span> <span class='hs-layout'>(</span><span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-varid'>sf</span><span class='hs-layout'>)</span>
<a name="line-145"></a>
<a name="line-146"></a><a name="deep"></a><span class='hs-comment'>{-# INLINE deep #-}</span>
<a name="line-147"></a><span class='hs-definition'>deep</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Sized</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Digit</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Digit</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-varid'>a</span>
<a name="line-148"></a><span class='hs-definition'>deep</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m</span> <span class='hs-varid'>sf</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Deep</span> <span class='hs-layout'>(</span><span class='hs-varid'>size</span> <span class='hs-varid'>pr</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>m</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>sf</span><span class='hs-layout'>)</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m</span> <span class='hs-varid'>sf</span>
<a name="line-149"></a>
<a name="line-150"></a><span class='hs-comment'>-- Digits</span>
<a name="line-151"></a>
<a name="line-152"></a><a name="Digit"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Digit</span> <span class='hs-varid'>a</span>
<a name="line-153"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>One</span> <span class='hs-varid'>a</span>
<a name="line-154"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>a</span>
<a name="line-155"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>a</span> <span class='hs-varid'>a</span>
<a name="line-156"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>a</span> <span class='hs-varid'>a</span> <span class='hs-varid'>a</span>
<a name="line-157"></a><span class='hs-cpp'>#if TESTING</span>
<a name="line-158"></a> <span class='hs-keyword'>deriving</span> <span class='hs-conid'>Show</span>
<a name="line-159"></a><span class='hs-cpp'>#endif</span>
<a name="line-160"></a>
<a name="line-161"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Functor</span> <span class='hs-conid'>Digit</span> <span class='hs-keyword'>where</span>
<a name="line-162"></a> <span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>One</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-163"></a> <span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Two</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-164"></a> <span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Three</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-165"></a> <span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Four</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span>
<a name="line-166"></a>
<a name="line-167"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Sized</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Sized</span> <span class='hs-layout'>(</span><span class='hs-conid'>Digit</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-168"></a> <span class='hs-varid'>size</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldlDigit</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span> <span class='hs-varid'>i</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>i</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-num'>0</span> <span class='hs-varid'>xs</span>
<a name="line-169"></a>
<a name="line-170"></a><a name="digitToTree"></a><span class='hs-comment'>{-# SPECIALIZE digitToTree :: Digit (Elem a) -> FingerTree (Elem a) #-}</span>
<a name="line-171"></a><span class='hs-comment'>{-# SPECIALIZE digitToTree :: Digit (Node a) -> FingerTree (Node a) #-}</span>
<a name="line-172"></a><span class='hs-definition'>digitToTree</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Sized</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Digit</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-varid'>a</span>
<a name="line-173"></a><span class='hs-definition'>digitToTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Single</span> <span class='hs-varid'>a</span>
<a name="line-174"></a><span class='hs-definition'>digitToTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>deep</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-conid'>Empty</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-175"></a><span class='hs-definition'>digitToTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>deep</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-conid'>Empty</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-176"></a><span class='hs-definition'>digitToTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>deep</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-conid'>Empty</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span>
<a name="line-177"></a>
<a name="line-178"></a><span class='hs-comment'>-- Nodes</span>
<a name="line-179"></a>
<a name="line-180"></a><a name="Node"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Node</span> <span class='hs-varid'>a</span>
<a name="line-181"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Node2</span> <span class='hs-comment'>{-# UNPACK #-}</span> <span class='hs-varop'>!</span><span class='hs-conid'>Int</span> <span class='hs-varid'>a</span> <span class='hs-varid'>a</span>
<a name="line-182"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Node3</span> <span class='hs-comment'>{-# UNPACK #-}</span> <span class='hs-varop'>!</span><span class='hs-conid'>Int</span> <span class='hs-varid'>a</span> <span class='hs-varid'>a</span> <span class='hs-varid'>a</span>
<a name="line-183"></a><span class='hs-cpp'>#if TESTING</span>
<a name="line-184"></a> <span class='hs-keyword'>deriving</span> <span class='hs-conid'>Show</span>
<a name="line-185"></a><span class='hs-cpp'>#endif</span>
<a name="line-186"></a>
<a name="line-187"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Functor</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-188"></a> <span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node2</span> <span class='hs-varid'>v</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Node2</span> <span class='hs-varid'>v</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-189"></a> <span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node3</span> <span class='hs-varid'>v</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Node3</span> <span class='hs-varid'>v</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-190"></a>
<a name="line-191"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Sized</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-192"></a> <span class='hs-varid'>size</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node2</span> <span class='hs-varid'>v</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>v</span>
<a name="line-193"></a> <span class='hs-varid'>size</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node3</span> <span class='hs-varid'>v</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>v</span>
<a name="line-194"></a>
<a name="line-195"></a><a name="node2"></a><span class='hs-comment'>{-# INLINE node2 #-}</span>
<a name="line-196"></a><span class='hs-definition'>node2</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Sized</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Node</span> <span class='hs-varid'>a</span>
<a name="line-197"></a><span class='hs-definition'>node2</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Node2</span> <span class='hs-layout'>(</span><span class='hs-varid'>size</span> <span class='hs-varid'>a</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span>
<a name="line-198"></a>
<a name="line-199"></a><a name="node3"></a><span class='hs-comment'>{-# INLINE node3 #-}</span>
<a name="line-200"></a><span class='hs-definition'>node3</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Sized</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Node</span> <span class='hs-varid'>a</span>
<a name="line-201"></a><span class='hs-definition'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Node3</span> <span class='hs-layout'>(</span><span class='hs-varid'>size</span> <span class='hs-varid'>a</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>b</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span>
<a name="line-202"></a>
<a name="line-203"></a><a name="nodeToDigit"></a><span class='hs-definition'>nodeToDigit</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Node</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Digit</span> <span class='hs-varid'>a</span>
<a name="line-204"></a><span class='hs-definition'>nodeToDigit</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node2</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span>
<a name="line-205"></a><span class='hs-definition'>nodeToDigit</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node3</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span>
<a name="line-206"></a>
<a name="line-207"></a><span class='hs-comment'>-- Elements</span>
<a name="line-208"></a>
<a name="line-209"></a><a name="Elem"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>Elem</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Elem</span> <span class='hs-layout'>{</span> <span class='hs-varid'>getElem</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>a</span> <span class='hs-layout'>}</span>
<a name="line-210"></a>
<a name="line-211"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Sized</span> <span class='hs-layout'>(</span><span class='hs-conid'>Elem</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-212"></a> <span class='hs-varid'>size</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-num'>1</span>
<a name="line-213"></a>
<a name="line-214"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Functor</span> <span class='hs-conid'>Elem</span> <span class='hs-keyword'>where</span>
<a name="line-215"></a> <span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Elem</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Elem</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span>
<a name="line-216"></a>
<a name="line-217"></a><span class='hs-cpp'>#ifdef TESTING</span>
<a name="line-218"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>Show</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Show</span> <span class='hs-layout'>(</span><span class='hs-conid'>Elem</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-219"></a> <span class='hs-varid'>showsPrec</span> <span class='hs-varid'>p</span> <span class='hs-layout'>(</span><span class='hs-conid'>Elem</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>showsPrec</span> <span class='hs-varid'>p</span> <span class='hs-varid'>x</span>
<a name="line-220"></a><span class='hs-cpp'>#endif</span>
<a name="line-221"></a>
<a name="line-222"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-223"></a><span class='hs-comment'>-- Construction</span>
<a name="line-224"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-225"></a>
<a name="line-226"></a><a name="empty"></a><span class='hs-comment'>-- | /O(1)/. The empty sequence.</span>
<a name="line-227"></a><span class='hs-definition'>empty</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span>
<a name="line-228"></a><span class='hs-definition'>empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Seq</span> <span class='hs-conid'>Empty</span>
<a name="line-229"></a>
<a name="line-230"></a><a name="singleton"></a><span class='hs-comment'>-- | /O(1)/. A singleton sequence.</span>
<a name="line-231"></a><span class='hs-definition'>singleton</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span>
<a name="line-232"></a><span class='hs-definition'>singleton</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Seq</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-layout'>(</span><span class='hs-conid'>Elem</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-233"></a>
<a name="line-234"></a><a name="<|"></a><span class='hs-comment'>-- | /O(1)/. Add an element to the left end of a sequence.</span>
<a name="line-235"></a><span class='hs-comment'>-- Mnemonic: a triangle with the single element at the pointy end.</span>
<a name="line-236"></a><span class='hs-layout'>(</span><span class='hs-varop'><|</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span>
<a name="line-237"></a><a name="x"></a><span class='hs-definition'>x</span> <span class='hs-varop'><|</span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Seq</span> <span class='hs-layout'>(</span><span class='hs-conid'>Elem</span> <span class='hs-varid'>x</span> <span class='hs-varop'>`consTree`</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span>
<a name="line-238"></a>
<a name="line-239"></a><a name="consTree"></a><span class='hs-comment'>{-# SPECIALIZE consTree :: Elem a -> FingerTree (Elem a) -> FingerTree (Elem a) #-}</span>
<a name="line-240"></a><span class='hs-comment'>{-# SPECIALIZE consTree :: Node a -> FingerTree (Node a) -> FingerTree (Node a) #-}</span>
<a name="line-241"></a><span class='hs-definition'>consTree</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Sized</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-varid'>a</span>
<a name="line-242"></a><span class='hs-definition'>consTree</span> <span class='hs-varid'>a</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Single</span> <span class='hs-varid'>a</span>
<a name="line-243"></a><span class='hs-definition'>consTree</span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>deep</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-conid'>Empty</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-244"></a><span class='hs-definition'>consTree</span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span> <span class='hs-varid'>sf</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>m</span> <span class='hs-varop'>`seq`</span>
<a name="line-245"></a> <span class='hs-conid'>Deep</span> <span class='hs-layout'>(</span><span class='hs-varid'>size</span> <span class='hs-varid'>a</span> <span class='hs-varop'>+</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varop'>`consTree`</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-varid'>sf</span>
<a name="line-246"></a><span class='hs-definition'>consTree</span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span> <span class='hs-varid'>sf</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-247"></a> <span class='hs-conid'>Deep</span> <span class='hs-layout'>(</span><span class='hs-varid'>size</span> <span class='hs-varid'>a</span> <span class='hs-varop'>+</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span> <span class='hs-varid'>sf</span>
<a name="line-248"></a><span class='hs-definition'>consTree</span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span> <span class='hs-varid'>sf</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-249"></a> <span class='hs-conid'>Deep</span> <span class='hs-layout'>(</span><span class='hs-varid'>size</span> <span class='hs-varid'>a</span> <span class='hs-varop'>+</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span> <span class='hs-varid'>sf</span>
<a name="line-250"></a><span class='hs-definition'>consTree</span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span> <span class='hs-varid'>sf</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-251"></a> <span class='hs-conid'>Deep</span> <span class='hs-layout'>(</span><span class='hs-varid'>size</span> <span class='hs-varid'>a</span> <span class='hs-varop'>+</span> <span class='hs-varid'>s</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span> <span class='hs-varid'>sf</span>
<a name="line-252"></a>
<a name="line-253"></a><a name="|>"></a><span class='hs-comment'>-- | /O(1)/. Add an element to the right end of a sequence.</span>
<a name="line-254"></a><span class='hs-comment'>-- Mnemonic: a triangle with the single element at the pointy end.</span>
<a name="line-255"></a><span class='hs-layout'>(</span><span class='hs-varop'>|></span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span>
<a name="line-256"></a><span class='hs-conid'>Seq</span> <span class='hs-varid'>xs</span> <span class='hs-varop'>|></span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Seq</span> <span class='hs-layout'>(</span><span class='hs-varid'>xs</span> <span class='hs-varop'>`snocTree`</span> <span class='hs-conid'>Elem</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span>
<a name="line-257"></a>
<a name="line-258"></a><a name="snocTree"></a><span class='hs-comment'>{-# SPECIALIZE snocTree :: FingerTree (Elem a) -> Elem a -> FingerTree (Elem a) #-}</span>
<a name="line-259"></a><span class='hs-comment'>{-# SPECIALIZE snocTree :: FingerTree (Node a) -> Node a -> FingerTree (Node a) #-}</span>
<a name="line-260"></a><span class='hs-definition'>snocTree</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Sized</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>FingerTree</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-varid'>a</span>
<a name="line-261"></a><span class='hs-definition'>snocTree</span> <span class='hs-conid'>Empty</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Single</span> <span class='hs-varid'>a</span>
<a name="line-262"></a><span class='hs-definition'>snocTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>deep</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-conid'>Empty</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-263"></a><span class='hs-definition'>snocTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-varid'>s</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>m</span> <span class='hs-varop'>`seq`</span>
<a name="line-264"></a> <span class='hs-conid'>Deep</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>pr</span> <span class='hs-layout'>(</span><span class='hs-varid'>m</span> <span class='hs-varop'>`snocTree`</span> <span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-265"></a><span class='hs-definition'>snocTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-varid'>s</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>d</span> <span class='hs-keyglyph'>=</span>
<a name="line-266"></a> <span class='hs-conid'>Deep</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span>
<a name="line-267"></a><span class='hs-definition'>snocTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-varid'>s</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>=</span>
<a name="line-268"></a> <span class='hs-conid'>Deep</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-269"></a><span class='hs-definition'>snocTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-varid'>s</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=</span>
<a name="line-270"></a> <span class='hs-conid'>Deep</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-271"></a>
<a name="line-272"></a><a name="><"></a><span class='hs-comment'>-- | /O(log(min(n1,n2)))/. Concatenate two sequences.</span>
<a name="line-273"></a><span class='hs-layout'>(</span><span class='hs-varop'>><</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span>
<a name="line-274"></a><span class='hs-conid'>Seq</span> <span class='hs-varid'>xs</span> <span class='hs-varop'>><</span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>ys</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Seq</span> <span class='hs-layout'>(</span><span class='hs-varid'>appendTree0</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>ys</span><span class='hs-layout'>)</span>
<a name="line-275"></a>
<a name="line-276"></a><span class='hs-comment'>-- The appendTree/addDigits gunk below is machine generated</span>
<a name="line-277"></a>
<a name="line-278"></a><a name="appendTree0"></a><span class='hs-definition'>appendTree0</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Elem</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Elem</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Elem</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-279"></a><span class='hs-definition'>appendTree0</span> <span class='hs-conid'>Empty</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span>
<a name="line-280"></a> <span class='hs-varid'>xs</span>
<a name="line-281"></a><span class='hs-definition'>appendTree0</span> <span class='hs-varid'>xs</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span>
<a name="line-282"></a> <span class='hs-varid'>xs</span>
<a name="line-283"></a><span class='hs-definition'>appendTree0</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span>
<a name="line-284"></a> <span class='hs-varid'>x</span> <span class='hs-varop'>`consTree`</span> <span class='hs-varid'>xs</span>
<a name="line-285"></a><span class='hs-definition'>appendTree0</span> <span class='hs-varid'>xs</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-286"></a> <span class='hs-varid'>xs</span> <span class='hs-varop'>`snocTree`</span> <span class='hs-varid'>x</span>
<a name="line-287"></a><span class='hs-definition'>appendTree0</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-varid'>s1</span> <span class='hs-varid'>pr1</span> <span class='hs-varid'>m1</span> <span class='hs-varid'>sf1</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-varid'>s2</span> <span class='hs-varid'>pr2</span> <span class='hs-varid'>m2</span> <span class='hs-varid'>sf2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-288"></a> <span class='hs-conid'>Deep</span> <span class='hs-layout'>(</span><span class='hs-varid'>s1</span> <span class='hs-varop'>+</span> <span class='hs-varid'>s2</span><span class='hs-layout'>)</span> <span class='hs-varid'>pr1</span> <span class='hs-layout'>(</span><span class='hs-varid'>addDigits0</span> <span class='hs-varid'>m1</span> <span class='hs-varid'>sf1</span> <span class='hs-varid'>pr2</span> <span class='hs-varid'>m2</span><span class='hs-layout'>)</span> <span class='hs-varid'>sf2</span>
<a name="line-289"></a>
<a name="line-290"></a><a name="addDigits0"></a><span class='hs-definition'>addDigits0</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-layout'>(</span><span class='hs-conid'>Elem</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Digit</span> <span class='hs-layout'>(</span><span class='hs-conid'>Elem</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Digit</span> <span class='hs-layout'>(</span><span class='hs-conid'>Elem</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-layout'>(</span><span class='hs-conid'>Elem</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-layout'>(</span><span class='hs-conid'>Elem</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-291"></a><span class='hs-definition'>addDigits0</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-292"></a> <span class='hs-varid'>appendTree1</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-293"></a><span class='hs-definition'>addDigits0</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-294"></a> <span class='hs-varid'>appendTree1</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-295"></a><span class='hs-definition'>addDigits0</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-296"></a> <span class='hs-varid'>appendTree2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-297"></a><span class='hs-definition'>addDigits0</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-298"></a> <span class='hs-varid'>appendTree2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-299"></a><span class='hs-definition'>addDigits0</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-300"></a> <span class='hs-varid'>appendTree1</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-301"></a><span class='hs-definition'>addDigits0</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-302"></a> <span class='hs-varid'>appendTree2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-303"></a><span class='hs-definition'>addDigits0</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-304"></a> <span class='hs-varid'>appendTree2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-305"></a><span class='hs-definition'>addDigits0</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-306"></a> <span class='hs-varid'>appendTree2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-307"></a><span class='hs-definition'>addDigits0</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-308"></a> <span class='hs-varid'>appendTree2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-309"></a><span class='hs-definition'>addDigits0</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-310"></a> <span class='hs-varid'>appendTree2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-311"></a><span class='hs-definition'>addDigits0</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-312"></a> <span class='hs-varid'>appendTree2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-313"></a><span class='hs-definition'>addDigits0</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-314"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-315"></a><span class='hs-definition'>addDigits0</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-316"></a> <span class='hs-varid'>appendTree2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-317"></a><span class='hs-definition'>addDigits0</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-318"></a> <span class='hs-varid'>appendTree2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-319"></a><span class='hs-definition'>addDigits0</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-320"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-321"></a><span class='hs-definition'>addDigits0</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-322"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-323"></a>
<a name="line-324"></a><a name="appendTree1"></a><span class='hs-definition'>appendTree1</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Node</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-325"></a><span class='hs-definition'>appendTree1</span> <span class='hs-conid'>Empty</span> <span class='hs-varid'>a</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span>
<a name="line-326"></a> <span class='hs-varid'>a</span> <span class='hs-varop'>`consTree`</span> <span class='hs-varid'>xs</span>
<a name="line-327"></a><span class='hs-definition'>appendTree1</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>a</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span>
<a name="line-328"></a> <span class='hs-varid'>xs</span> <span class='hs-varop'>`snocTree`</span> <span class='hs-varid'>a</span>
<a name="line-329"></a><span class='hs-definition'>appendTree1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span>
<a name="line-330"></a> <span class='hs-varid'>x</span> <span class='hs-varop'>`consTree`</span> <span class='hs-varid'>a</span> <span class='hs-varop'>`consTree`</span> <span class='hs-varid'>xs</span>
<a name="line-331"></a><span class='hs-definition'>appendTree1</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-332"></a> <span class='hs-varid'>xs</span> <span class='hs-varop'>`snocTree`</span> <span class='hs-varid'>a</span> <span class='hs-varop'>`snocTree`</span> <span class='hs-varid'>x</span>
<a name="line-333"></a><span class='hs-definition'>appendTree1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-varid'>s1</span> <span class='hs-varid'>pr1</span> <span class='hs-varid'>m1</span> <span class='hs-varid'>sf1</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-varid'>s2</span> <span class='hs-varid'>pr2</span> <span class='hs-varid'>m2</span> <span class='hs-varid'>sf2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-334"></a> <span class='hs-conid'>Deep</span> <span class='hs-layout'>(</span><span class='hs-varid'>s1</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>a</span> <span class='hs-varop'>+</span> <span class='hs-varid'>s2</span><span class='hs-layout'>)</span> <span class='hs-varid'>pr1</span> <span class='hs-layout'>(</span><span class='hs-varid'>addDigits1</span> <span class='hs-varid'>m1</span> <span class='hs-varid'>sf1</span> <span class='hs-varid'>a</span> <span class='hs-varid'>pr2</span> <span class='hs-varid'>m2</span><span class='hs-layout'>)</span> <span class='hs-varid'>sf2</span>
<a name="line-335"></a>
<a name="line-336"></a><a name="addDigits1"></a><span class='hs-definition'>addDigits1</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Digit</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Node</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Digit</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-337"></a><span class='hs-definition'>addDigits1</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-338"></a> <span class='hs-varid'>appendTree1</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-339"></a><span class='hs-definition'>addDigits1</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-340"></a> <span class='hs-varid'>appendTree2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-341"></a><span class='hs-definition'>addDigits1</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-342"></a> <span class='hs-varid'>appendTree2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-343"></a><span class='hs-definition'>addDigits1</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-344"></a> <span class='hs-varid'>appendTree2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-345"></a><span class='hs-definition'>addDigits1</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-346"></a> <span class='hs-varid'>appendTree2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-347"></a><span class='hs-definition'>addDigits1</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-348"></a> <span class='hs-varid'>appendTree2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-349"></a><span class='hs-definition'>addDigits1</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-350"></a> <span class='hs-varid'>appendTree2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-351"></a><span class='hs-definition'>addDigits1</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-352"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-353"></a><span class='hs-definition'>addDigits1</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>d</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-354"></a> <span class='hs-varid'>appendTree2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-355"></a><span class='hs-definition'>addDigits1</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>d</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-356"></a> <span class='hs-varid'>appendTree2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-357"></a><span class='hs-definition'>addDigits1</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>d</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-358"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-359"></a><span class='hs-definition'>addDigits1</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>d</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-360"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-361"></a><span class='hs-definition'>addDigits1</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>e</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-362"></a> <span class='hs-varid'>appendTree2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-363"></a><span class='hs-definition'>addDigits1</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>e</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-364"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-365"></a><span class='hs-definition'>addDigits1</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>e</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-366"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-367"></a><span class='hs-definition'>addDigits1</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>e</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-368"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-369"></a>
<a name="line-370"></a><a name="appendTree2"></a><span class='hs-definition'>appendTree2</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Node</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Node</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-371"></a><span class='hs-definition'>appendTree2</span> <span class='hs-conid'>Empty</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span>
<a name="line-372"></a> <span class='hs-varid'>a</span> <span class='hs-varop'>`consTree`</span> <span class='hs-varid'>b</span> <span class='hs-varop'>`consTree`</span> <span class='hs-varid'>xs</span>
<a name="line-373"></a><span class='hs-definition'>appendTree2</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span>
<a name="line-374"></a> <span class='hs-varid'>xs</span> <span class='hs-varop'>`snocTree`</span> <span class='hs-varid'>a</span> <span class='hs-varop'>`snocTree`</span> <span class='hs-varid'>b</span>
<a name="line-375"></a><span class='hs-definition'>appendTree2</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span>
<a name="line-376"></a> <span class='hs-varid'>x</span> <span class='hs-varop'>`consTree`</span> <span class='hs-varid'>a</span> <span class='hs-varop'>`consTree`</span> <span class='hs-varid'>b</span> <span class='hs-varop'>`consTree`</span> <span class='hs-varid'>xs</span>
<a name="line-377"></a><span class='hs-definition'>appendTree2</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-378"></a> <span class='hs-varid'>xs</span> <span class='hs-varop'>`snocTree`</span> <span class='hs-varid'>a</span> <span class='hs-varop'>`snocTree`</span> <span class='hs-varid'>b</span> <span class='hs-varop'>`snocTree`</span> <span class='hs-varid'>x</span>
<a name="line-379"></a><span class='hs-definition'>appendTree2</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-varid'>s1</span> <span class='hs-varid'>pr1</span> <span class='hs-varid'>m1</span> <span class='hs-varid'>sf1</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-varid'>s2</span> <span class='hs-varid'>pr2</span> <span class='hs-varid'>m2</span> <span class='hs-varid'>sf2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-380"></a> <span class='hs-conid'>Deep</span> <span class='hs-layout'>(</span><span class='hs-varid'>s1</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>a</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>b</span> <span class='hs-varop'>+</span> <span class='hs-varid'>s2</span><span class='hs-layout'>)</span> <span class='hs-varid'>pr1</span> <span class='hs-layout'>(</span><span class='hs-varid'>addDigits2</span> <span class='hs-varid'>m1</span> <span class='hs-varid'>sf1</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>pr2</span> <span class='hs-varid'>m2</span><span class='hs-layout'>)</span> <span class='hs-varid'>sf2</span>
<a name="line-381"></a>
<a name="line-382"></a><a name="addDigits2"></a><span class='hs-definition'>addDigits2</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Digit</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Node</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Node</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Digit</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-383"></a><span class='hs-definition'>addDigits2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-384"></a> <span class='hs-varid'>appendTree2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-385"></a><span class='hs-definition'>addDigits2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-386"></a> <span class='hs-varid'>appendTree2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-387"></a><span class='hs-definition'>addDigits2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-388"></a> <span class='hs-varid'>appendTree2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-389"></a><span class='hs-definition'>addDigits2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-390"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-391"></a><span class='hs-definition'>addDigits2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-392"></a> <span class='hs-varid'>appendTree2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-393"></a><span class='hs-definition'>addDigits2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-394"></a> <span class='hs-varid'>appendTree2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-395"></a><span class='hs-definition'>addDigits2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-396"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-397"></a><span class='hs-definition'>addDigits2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-398"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-399"></a><span class='hs-definition'>addDigits2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-400"></a> <span class='hs-varid'>appendTree2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-401"></a><span class='hs-definition'>addDigits2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-402"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-403"></a><span class='hs-definition'>addDigits2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-404"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-405"></a><span class='hs-definition'>addDigits2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-406"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-407"></a><span class='hs-definition'>addDigits2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-408"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-409"></a><span class='hs-definition'>addDigits2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-410"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-411"></a><span class='hs-definition'>addDigits2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-412"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-413"></a><span class='hs-definition'>addDigits2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span> <span class='hs-varid'>i</span> <span class='hs-varid'>j</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-414"></a> <span class='hs-varid'>appendTree4</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>i</span> <span class='hs-varid'>j</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-415"></a>
<a name="line-416"></a><a name="appendTree3"></a><span class='hs-definition'>appendTree3</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Node</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Node</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Node</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-417"></a><span class='hs-definition'>appendTree3</span> <span class='hs-conid'>Empty</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span>
<a name="line-418"></a> <span class='hs-varid'>a</span> <span class='hs-varop'>`consTree`</span> <span class='hs-varid'>b</span> <span class='hs-varop'>`consTree`</span> <span class='hs-varid'>c</span> <span class='hs-varop'>`consTree`</span> <span class='hs-varid'>xs</span>
<a name="line-419"></a><span class='hs-definition'>appendTree3</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span>
<a name="line-420"></a> <span class='hs-varid'>xs</span> <span class='hs-varop'>`snocTree`</span> <span class='hs-varid'>a</span> <span class='hs-varop'>`snocTree`</span> <span class='hs-varid'>b</span> <span class='hs-varop'>`snocTree`</span> <span class='hs-varid'>c</span>
<a name="line-421"></a><span class='hs-definition'>appendTree3</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span>
<a name="line-422"></a> <span class='hs-varid'>x</span> <span class='hs-varop'>`consTree`</span> <span class='hs-varid'>a</span> <span class='hs-varop'>`consTree`</span> <span class='hs-varid'>b</span> <span class='hs-varop'>`consTree`</span> <span class='hs-varid'>c</span> <span class='hs-varop'>`consTree`</span> <span class='hs-varid'>xs</span>
<a name="line-423"></a><span class='hs-definition'>appendTree3</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-424"></a> <span class='hs-varid'>xs</span> <span class='hs-varop'>`snocTree`</span> <span class='hs-varid'>a</span> <span class='hs-varop'>`snocTree`</span> <span class='hs-varid'>b</span> <span class='hs-varop'>`snocTree`</span> <span class='hs-varid'>c</span> <span class='hs-varop'>`snocTree`</span> <span class='hs-varid'>x</span>
<a name="line-425"></a><span class='hs-definition'>appendTree3</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-varid'>s1</span> <span class='hs-varid'>pr1</span> <span class='hs-varid'>m1</span> <span class='hs-varid'>sf1</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-varid'>s2</span> <span class='hs-varid'>pr2</span> <span class='hs-varid'>m2</span> <span class='hs-varid'>sf2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-426"></a> <span class='hs-conid'>Deep</span> <span class='hs-layout'>(</span><span class='hs-varid'>s1</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>a</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>b</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>c</span> <span class='hs-varop'>+</span> <span class='hs-varid'>s2</span><span class='hs-layout'>)</span> <span class='hs-varid'>pr1</span> <span class='hs-layout'>(</span><span class='hs-varid'>addDigits3</span> <span class='hs-varid'>m1</span> <span class='hs-varid'>sf1</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>pr2</span> <span class='hs-varid'>m2</span><span class='hs-layout'>)</span> <span class='hs-varid'>sf2</span>
<a name="line-427"></a>
<a name="line-428"></a><a name="addDigits3"></a><span class='hs-definition'>addDigits3</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Digit</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Node</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Node</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Node</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Digit</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-429"></a><span class='hs-definition'>addDigits3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-430"></a> <span class='hs-varid'>appendTree2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-431"></a><span class='hs-definition'>addDigits3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-432"></a> <span class='hs-varid'>appendTree2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-433"></a><span class='hs-definition'>addDigits3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-434"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-435"></a><span class='hs-definition'>addDigits3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-436"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-437"></a><span class='hs-definition'>addDigits3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-438"></a> <span class='hs-varid'>appendTree2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-439"></a><span class='hs-definition'>addDigits3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-440"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-441"></a><span class='hs-definition'>addDigits3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-442"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-443"></a><span class='hs-definition'>addDigits3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-444"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-445"></a><span class='hs-definition'>addDigits3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-446"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-447"></a><span class='hs-definition'>addDigits3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-448"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-449"></a><span class='hs-definition'>addDigits3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-450"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-451"></a><span class='hs-definition'>addDigits3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span> <span class='hs-varid'>i</span> <span class='hs-varid'>j</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-452"></a> <span class='hs-varid'>appendTree4</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>i</span> <span class='hs-varid'>j</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-453"></a><span class='hs-definition'>addDigits3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-454"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-455"></a><span class='hs-definition'>addDigits3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>h</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-456"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-457"></a><span class='hs-definition'>addDigits3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>h</span> <span class='hs-varid'>i</span> <span class='hs-varid'>j</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-458"></a> <span class='hs-varid'>appendTree4</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>i</span> <span class='hs-varid'>j</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-459"></a><span class='hs-definition'>addDigits3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>h</span> <span class='hs-varid'>i</span> <span class='hs-varid'>j</span> <span class='hs-varid'>k</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-460"></a> <span class='hs-varid'>appendTree4</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>j</span> <span class='hs-varid'>k</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-461"></a>
<a name="line-462"></a><a name="appendTree4"></a><span class='hs-definition'>appendTree4</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Node</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Node</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Node</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Node</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-463"></a><span class='hs-definition'>appendTree4</span> <span class='hs-conid'>Empty</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span>
<a name="line-464"></a> <span class='hs-varid'>a</span> <span class='hs-varop'>`consTree`</span> <span class='hs-varid'>b</span> <span class='hs-varop'>`consTree`</span> <span class='hs-varid'>c</span> <span class='hs-varop'>`consTree`</span> <span class='hs-varid'>d</span> <span class='hs-varop'>`consTree`</span> <span class='hs-varid'>xs</span>
<a name="line-465"></a><span class='hs-definition'>appendTree4</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span>
<a name="line-466"></a> <span class='hs-varid'>xs</span> <span class='hs-varop'>`snocTree`</span> <span class='hs-varid'>a</span> <span class='hs-varop'>`snocTree`</span> <span class='hs-varid'>b</span> <span class='hs-varop'>`snocTree`</span> <span class='hs-varid'>c</span> <span class='hs-varop'>`snocTree`</span> <span class='hs-varid'>d</span>
<a name="line-467"></a><span class='hs-definition'>appendTree4</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span>
<a name="line-468"></a> <span class='hs-varid'>x</span> <span class='hs-varop'>`consTree`</span> <span class='hs-varid'>a</span> <span class='hs-varop'>`consTree`</span> <span class='hs-varid'>b</span> <span class='hs-varop'>`consTree`</span> <span class='hs-varid'>c</span> <span class='hs-varop'>`consTree`</span> <span class='hs-varid'>d</span> <span class='hs-varop'>`consTree`</span> <span class='hs-varid'>xs</span>
<a name="line-469"></a><span class='hs-definition'>appendTree4</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-470"></a> <span class='hs-varid'>xs</span> <span class='hs-varop'>`snocTree`</span> <span class='hs-varid'>a</span> <span class='hs-varop'>`snocTree`</span> <span class='hs-varid'>b</span> <span class='hs-varop'>`snocTree`</span> <span class='hs-varid'>c</span> <span class='hs-varop'>`snocTree`</span> <span class='hs-varid'>d</span> <span class='hs-varop'>`snocTree`</span> <span class='hs-varid'>x</span>
<a name="line-471"></a><span class='hs-definition'>appendTree4</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-varid'>s1</span> <span class='hs-varid'>pr1</span> <span class='hs-varid'>m1</span> <span class='hs-varid'>sf1</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-varid'>s2</span> <span class='hs-varid'>pr2</span> <span class='hs-varid'>m2</span> <span class='hs-varid'>sf2</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-472"></a> <span class='hs-conid'>Deep</span> <span class='hs-layout'>(</span><span class='hs-varid'>s1</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>a</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>b</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>c</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>d</span> <span class='hs-varop'>+</span> <span class='hs-varid'>s2</span><span class='hs-layout'>)</span> <span class='hs-varid'>pr1</span> <span class='hs-layout'>(</span><span class='hs-varid'>addDigits4</span> <span class='hs-varid'>m1</span> <span class='hs-varid'>sf1</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-varid'>pr2</span> <span class='hs-varid'>m2</span><span class='hs-layout'>)</span> <span class='hs-varid'>sf2</span>
<a name="line-473"></a>
<a name="line-474"></a><a name="addDigits4"></a><span class='hs-definition'>addDigits4</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Digit</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Node</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Node</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Node</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Node</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Digit</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-475"></a><span class='hs-definition'>addDigits4</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-476"></a> <span class='hs-varid'>appendTree2</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-477"></a><span class='hs-definition'>addDigits4</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-478"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-479"></a><span class='hs-definition'>addDigits4</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-480"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-481"></a><span class='hs-definition'>addDigits4</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-482"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-483"></a><span class='hs-definition'>addDigits4</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-484"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-485"></a><span class='hs-definition'>addDigits4</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-486"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-487"></a><span class='hs-definition'>addDigits4</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-488"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-489"></a><span class='hs-definition'>addDigits4</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span> <span class='hs-varid'>i</span> <span class='hs-varid'>j</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-490"></a> <span class='hs-varid'>appendTree4</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>i</span> <span class='hs-varid'>j</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-491"></a><span class='hs-definition'>addDigits4</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-492"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-493"></a><span class='hs-definition'>addDigits4</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>h</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-494"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-495"></a><span class='hs-definition'>addDigits4</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>h</span> <span class='hs-varid'>i</span> <span class='hs-varid'>j</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-496"></a> <span class='hs-varid'>appendTree4</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>i</span> <span class='hs-varid'>j</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-497"></a><span class='hs-definition'>addDigits4</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>h</span> <span class='hs-varid'>i</span> <span class='hs-varid'>j</span> <span class='hs-varid'>k</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-498"></a> <span class='hs-varid'>appendTree4</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>j</span> <span class='hs-varid'>k</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-499"></a><span class='hs-definition'>addDigits4</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-500"></a> <span class='hs-varid'>appendTree3</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-501"></a><span class='hs-definition'>addDigits4</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>i</span> <span class='hs-varid'>j</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-502"></a> <span class='hs-varid'>appendTree4</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>i</span> <span class='hs-varid'>j</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-503"></a><span class='hs-definition'>addDigits4</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>i</span> <span class='hs-varid'>j</span> <span class='hs-varid'>k</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-504"></a> <span class='hs-varid'>appendTree4</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node2</span> <span class='hs-varid'>j</span> <span class='hs-varid'>k</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-505"></a><span class='hs-definition'>addDigits4</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>i</span> <span class='hs-varid'>j</span> <span class='hs-varid'>k</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span> <span class='hs-keyglyph'>=</span>
<a name="line-506"></a> <span class='hs-varid'>appendTree4</span> <span class='hs-varid'>m1</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>g</span> <span class='hs-varid'>h</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>node3</span> <span class='hs-varid'>j</span> <span class='hs-varid'>k</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-varid'>m2</span>
<a name="line-507"></a>
<a name="line-508"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-509"></a><span class='hs-comment'>-- Deconstruction</span>
<a name="line-510"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-511"></a>
<a name="line-512"></a><a name="null"></a><span class='hs-comment'>-- | /O(1)/. Is this the empty sequence?</span>
<a name="line-513"></a><span class='hs-definition'>null</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-514"></a><span class='hs-definition'>null</span> <span class='hs-layout'>(</span><span class='hs-conid'>Seq</span> <span class='hs-conid'>Empty</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-515"></a><span class='hs-definition'>null</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>False</span>
<a name="line-516"></a>
<a name="line-517"></a><a name="length"></a><span class='hs-comment'>-- | /O(1)/. The number of elements in the sequence.</span>
<a name="line-518"></a><span class='hs-definition'>length</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span>
<a name="line-519"></a><span class='hs-definition'>length</span> <span class='hs-layout'>(</span><span class='hs-conid'>Seq</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>size</span> <span class='hs-varid'>xs</span>
<a name="line-520"></a>
<a name="line-521"></a><span class='hs-comment'>-- Views</span>
<a name="line-522"></a>
<a name="line-523"></a><a name="Maybe2"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Maybe2</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing2</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Just2</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span>
<a name="line-524"></a>
<a name="line-525"></a><a name="ViewL"></a><span class='hs-comment'>-- | View of the left end of a sequence.</span>
<a name="line-526"></a><a name="ViewL"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>ViewL</span> <span class='hs-varid'>a</span>
<a name="line-527"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>EmptyL</span> <span class='hs-comment'>-- ^ empty sequence</span>
<a name="line-528"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>a</span> <span class='hs-conop'>:<</span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span> <span class='hs-comment'>-- ^ leftmost element and the rest of the sequence</span>
<a name="line-529"></a><span class='hs-cpp'>#ifndef __HADDOCK__</span>
<a name="line-530"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Eq</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span><span class='hs-layout'>)</span>
<a name="line-531"></a><span class='hs-cpp'>#else</span>
<a name="line-532"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Eq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Eq</span> <span class='hs-layout'>(</span><span class='hs-conid'>ViewL</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-533"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Show</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Show</span> <span class='hs-layout'>(</span><span class='hs-conid'>ViewL</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-534"></a><span class='hs-cpp'>#endif</span>
<a name="line-535"></a>
<a name="line-536"></a>
<a name="line-537"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Functor</span> <span class='hs-conid'>ViewL</span> <span class='hs-keyword'>where</span>
<a name="line-538"></a> <span class='hs-varid'>fmap</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>EmptyL</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>EmptyL</span>
<a name="line-539"></a> <span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>x</span> <span class='hs-conop'>:<</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span> <span class='hs-conop'>:<</span> <span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-varid'>xs</span>
<a name="line-540"></a>
<a name="line-541"></a><a name="viewl"></a><span class='hs-comment'>-- | /O(1)/. Analyse the left end of a sequence.</span>
<a name="line-542"></a><span class='hs-definition'>viewl</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ViewL</span> <span class='hs-varid'>a</span>
<a name="line-543"></a><span class='hs-definition'>viewl</span> <span class='hs-layout'>(</span><span class='hs-conid'>Seq</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>viewLTree</span> <span class='hs-varid'>xs</span> <span class='hs-keyword'>of</span>
<a name="line-544"></a> <span class='hs-conid'>Nothing2</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>EmptyL</span>
<a name="line-545"></a> <span class='hs-conid'>Just2</span> <span class='hs-layout'>(</span><span class='hs-conid'>Elem</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varid'>xs'</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>x</span> <span class='hs-conop'>:<</span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>xs'</span>
<a name="line-546"></a>
<a name="line-547"></a><a name="viewLTree"></a><span class='hs-comment'>{-# SPECIALIZE viewLTree :: FingerTree (Elem a) -> Maybe2 (Elem a) (FingerTree (Elem a)) #-}</span>
<a name="line-548"></a><span class='hs-comment'>{-# SPECIALIZE viewLTree :: FingerTree (Node a) -> Maybe2 (Node a) (FingerTree (Node a)) #-}</span>
<a name="line-549"></a><span class='hs-definition'>viewLTree</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Sized</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>FingerTree</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe2</span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-conid'>FingerTree</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-550"></a><span class='hs-definition'>viewLTree</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing2</span>
<a name="line-551"></a><span class='hs-definition'>viewLTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just2</span> <span class='hs-varid'>a</span> <span class='hs-conid'>Empty</span>
<a name="line-552"></a><span class='hs-definition'>viewLTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span> <span class='hs-varid'>sf</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just2</span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-keyword'>case</span> <span class='hs-varid'>viewLTree</span> <span class='hs-varid'>m</span> <span class='hs-keyword'>of</span>
<a name="line-553"></a> <span class='hs-conid'>Nothing2</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>digitToTree</span> <span class='hs-varid'>sf</span>
<a name="line-554"></a> <span class='hs-conid'>Just2</span> <span class='hs-varid'>b</span> <span class='hs-varid'>m'</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Deep</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span> <span class='hs-comment'>-</span> <span class='hs-varid'>size</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>nodeToDigit</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varid'>m'</span> <span class='hs-varid'>sf</span><span class='hs-layout'>)</span>
<a name="line-555"></a><span class='hs-definition'>viewLTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span> <span class='hs-varid'>sf</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-556"></a> <span class='hs-conid'>Just2</span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span> <span class='hs-comment'>-</span> <span class='hs-varid'>size</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span> <span class='hs-varid'>sf</span><span class='hs-layout'>)</span>
<a name="line-557"></a><span class='hs-definition'>viewLTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span> <span class='hs-varid'>sf</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-558"></a> <span class='hs-conid'>Just2</span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span> <span class='hs-comment'>-</span> <span class='hs-varid'>size</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span> <span class='hs-varid'>sf</span><span class='hs-layout'>)</span>
<a name="line-559"></a><span class='hs-definition'>viewLTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span> <span class='hs-varid'>sf</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-560"></a> <span class='hs-conid'>Just2</span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span> <span class='hs-comment'>-</span> <span class='hs-varid'>size</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span> <span class='hs-varid'>sf</span><span class='hs-layout'>)</span>
<a name="line-561"></a>
<a name="line-562"></a><a name="ViewR"></a><span class='hs-comment'>-- | View of the right end of a sequence.</span>
<a name="line-563"></a><a name="ViewR"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>ViewR</span> <span class='hs-varid'>a</span>
<a name="line-564"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>EmptyR</span> <span class='hs-comment'>-- ^ empty sequence</span>
<a name="line-565"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span> <span class='hs-conop'>:></span> <span class='hs-varid'>a</span> <span class='hs-comment'>-- ^ the sequence minus the rightmost element,</span>
<a name="line-566"></a> <span class='hs-comment'>-- and the rightmost element</span>
<a name="line-567"></a><span class='hs-cpp'>#ifndef __HADDOCK__</span>
<a name="line-568"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Eq</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span><span class='hs-layout'>)</span>
<a name="line-569"></a><span class='hs-cpp'>#else</span>
<a name="line-570"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Eq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Eq</span> <span class='hs-layout'>(</span><span class='hs-conid'>ViewR</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-571"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Show</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Show</span> <span class='hs-layout'>(</span><span class='hs-conid'>ViewR</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-572"></a><span class='hs-cpp'>#endif</span>
<a name="line-573"></a>
<a name="line-574"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Functor</span> <span class='hs-conid'>ViewR</span> <span class='hs-keyword'>where</span>
<a name="line-575"></a> <span class='hs-varid'>fmap</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>EmptyR</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>EmptyR</span>
<a name="line-576"></a> <span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>xs</span> <span class='hs-conop'>:></span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-varid'>xs</span> <span class='hs-conop'>:></span> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span>
<a name="line-577"></a>
<a name="line-578"></a><a name="viewr"></a><span class='hs-comment'>-- | /O(1)/. Analyse the right end of a sequence.</span>
<a name="line-579"></a><span class='hs-definition'>viewr</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ViewR</span> <span class='hs-varid'>a</span>
<a name="line-580"></a><span class='hs-definition'>viewr</span> <span class='hs-layout'>(</span><span class='hs-conid'>Seq</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>viewRTree</span> <span class='hs-varid'>xs</span> <span class='hs-keyword'>of</span>
<a name="line-581"></a> <span class='hs-conid'>Nothing2</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>EmptyR</span>
<a name="line-582"></a> <span class='hs-conid'>Just2</span> <span class='hs-varid'>xs'</span> <span class='hs-layout'>(</span><span class='hs-conid'>Elem</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>xs'</span> <span class='hs-conop'>:></span> <span class='hs-varid'>x</span>
<a name="line-583"></a>
<a name="line-584"></a><a name="viewRTree"></a><span class='hs-comment'>{-# SPECIALIZE viewRTree :: FingerTree (Elem a) -> Maybe2 (FingerTree (Elem a)) (Elem a) #-}</span>
<a name="line-585"></a><span class='hs-comment'>{-# SPECIALIZE viewRTree :: FingerTree (Node a) -> Maybe2 (FingerTree (Node a)) (Node a) #-}</span>
<a name="line-586"></a><span class='hs-definition'>viewRTree</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Sized</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>FingerTree</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe2</span> <span class='hs-layout'>(</span><span class='hs-conid'>FingerTree</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span>
<a name="line-587"></a><span class='hs-definition'>viewRTree</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing2</span>
<a name="line-588"></a><span class='hs-definition'>viewRTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just2</span> <span class='hs-conid'>Empty</span> <span class='hs-varid'>z</span>
<a name="line-589"></a><span class='hs-definition'>viewRTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-varid'>s</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just2</span> <span class='hs-layout'>(</span><span class='hs-keyword'>case</span> <span class='hs-varid'>viewRTree</span> <span class='hs-varid'>m</span> <span class='hs-keyword'>of</span>
<a name="line-590"></a> <span class='hs-conid'>Nothing2</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>digitToTree</span> <span class='hs-varid'>pr</span>
<a name="line-591"></a> <span class='hs-conid'>Just2</span> <span class='hs-varid'>m'</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Deep</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span> <span class='hs-comment'>-</span> <span class='hs-varid'>size</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m'</span> <span class='hs-layout'>(</span><span class='hs-varid'>nodeToDigit</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>z</span>
<a name="line-592"></a><span class='hs-definition'>viewRTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-varid'>s</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>y</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-593"></a> <span class='hs-conid'>Just2</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span> <span class='hs-comment'>-</span> <span class='hs-varid'>size</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>z</span>
<a name="line-594"></a><span class='hs-definition'>viewRTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-varid'>s</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-595"></a> <span class='hs-conid'>Just2</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span> <span class='hs-comment'>-</span> <span class='hs-varid'>size</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>z</span>
<a name="line-596"></a><span class='hs-definition'>viewRTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-varid'>s</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>w</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-597"></a> <span class='hs-conid'>Just2</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-layout'>(</span><span class='hs-varid'>s</span> <span class='hs-comment'>-</span> <span class='hs-varid'>size</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>w</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>z</span>
<a name="line-598"></a>
<a name="line-599"></a><span class='hs-comment'>-- Indexing</span>
<a name="line-600"></a>
<a name="line-601"></a><a name="index"></a><span class='hs-comment'>-- | /O(log(min(i,n-i)))/. The element at the specified position</span>
<a name="line-602"></a><span class='hs-definition'>index</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-603"></a><span class='hs-definition'>index</span> <span class='hs-layout'>(</span><span class='hs-conid'>Seq</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-varid'>i</span>
<a name="line-604"></a> <span class='hs-keyglyph'>|</span> <span class='hs-num'>0</span> <span class='hs-varop'><=</span> <span class='hs-varid'>i</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>i</span> <span class='hs-varop'><</span> <span class='hs-varid'>size</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>lookupTree</span> <span class='hs-layout'>(</span><span class='hs-comment'>-</span><span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-varid'>xs</span> <span class='hs-keyword'>of</span>
<a name="line-605"></a> <span class='hs-conid'>Place</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>Elem</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>x</span>
<a name="line-606"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>error</span> <span class='hs-str'>"index out of bounds"</span>
<a name="line-607"></a>
<a name="line-608"></a><a name="Place"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Place</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Place</span> <span class='hs-comment'>{-# UNPACK #-}</span> <span class='hs-varop'>!</span><span class='hs-conid'>Int</span> <span class='hs-varid'>a</span>
<a name="line-609"></a><span class='hs-cpp'>#if TESTING</span>
<a name="line-610"></a> <span class='hs-keyword'>deriving</span> <span class='hs-conid'>Show</span>
<a name="line-611"></a><span class='hs-cpp'>#endif</span>
<a name="line-612"></a>
<a name="line-613"></a><a name="lookupTree"></a><span class='hs-comment'>{-# SPECIALIZE lookupTree :: Int -> FingerTree (Elem a) -> Place (Elem a) #-}</span>
<a name="line-614"></a><span class='hs-comment'>{-# SPECIALIZE lookupTree :: Int -> FingerTree (Node a) -> Place (Node a) #-}</span>
<a name="line-615"></a><span class='hs-definition'>lookupTree</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Sized</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Place</span> <span class='hs-varid'>a</span>
<a name="line-616"></a><span class='hs-definition'>lookupTree</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Place</span> <span class='hs-varid'>i</span> <span class='hs-varid'>x</span>
<a name="line-617"></a><span class='hs-definition'>lookupTree</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m</span> <span class='hs-varid'>sf</span><span class='hs-layout'>)</span>
<a name="line-618"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>vpr</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>lookupDigit</span> <span class='hs-varid'>i</span> <span class='hs-varid'>pr</span>
<a name="line-619"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>vm</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>lookupTree</span> <span class='hs-varid'>vpr</span> <span class='hs-varid'>m</span> <span class='hs-keyword'>of</span>
<a name="line-620"></a> <span class='hs-conid'>Place</span> <span class='hs-varid'>i'</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>lookupNode</span> <span class='hs-varid'>i'</span> <span class='hs-varid'>xs</span>
<a name="line-621"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>lookupDigit</span> <span class='hs-varid'>vm</span> <span class='hs-varid'>sf</span>
<a name="line-622"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>vpr</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>i</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>pr</span>
<a name="line-623"></a> <span class='hs-varid'>vm</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>vpr</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>m</span>
<a name="line-624"></a>
<a name="line-625"></a><a name="lookupNode"></a><span class='hs-comment'>{-# SPECIALIZE lookupNode :: Int -> Node (Elem a) -> Place (Elem a) #-}</span>
<a name="line-626"></a><span class='hs-comment'>{-# SPECIALIZE lookupNode :: Int -> Node (Node a) -> Place (Node a) #-}</span>
<a name="line-627"></a><span class='hs-definition'>lookupNode</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Sized</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Node</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Place</span> <span class='hs-varid'>a</span>
<a name="line-628"></a><span class='hs-definition'>lookupNode</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node2</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-629"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>va</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Place</span> <span class='hs-varid'>i</span> <span class='hs-varid'>a</span>
<a name="line-630"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Place</span> <span class='hs-varid'>va</span> <span class='hs-varid'>b</span>
<a name="line-631"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>va</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>i</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>a</span>
<a name="line-632"></a><span class='hs-definition'>lookupNode</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node3</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-633"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>va</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Place</span> <span class='hs-varid'>i</span> <span class='hs-varid'>a</span>
<a name="line-634"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>vab</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Place</span> <span class='hs-varid'>va</span> <span class='hs-varid'>b</span>
<a name="line-635"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Place</span> <span class='hs-varid'>vab</span> <span class='hs-varid'>c</span>
<a name="line-636"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>va</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>i</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>a</span>
<a name="line-637"></a> <span class='hs-varid'>vab</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>va</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>b</span>
<a name="line-638"></a>
<a name="line-639"></a><a name="lookupDigit"></a><span class='hs-comment'>{-# SPECIALIZE lookupDigit :: Int -> Digit (Elem a) -> Place (Elem a) #-}</span>
<a name="line-640"></a><span class='hs-comment'>{-# SPECIALIZE lookupDigit :: Int -> Digit (Node a) -> Place (Node a) #-}</span>
<a name="line-641"></a><span class='hs-definition'>lookupDigit</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Sized</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Digit</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Place</span> <span class='hs-varid'>a</span>
<a name="line-642"></a><span class='hs-definition'>lookupDigit</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Place</span> <span class='hs-varid'>i</span> <span class='hs-varid'>a</span>
<a name="line-643"></a><span class='hs-definition'>lookupDigit</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-644"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>va</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Place</span> <span class='hs-varid'>i</span> <span class='hs-varid'>a</span>
<a name="line-645"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Place</span> <span class='hs-varid'>va</span> <span class='hs-varid'>b</span>
<a name="line-646"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>va</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>i</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>a</span>
<a name="line-647"></a><span class='hs-definition'>lookupDigit</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-648"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>va</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Place</span> <span class='hs-varid'>i</span> <span class='hs-varid'>a</span>
<a name="line-649"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>vab</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Place</span> <span class='hs-varid'>va</span> <span class='hs-varid'>b</span>
<a name="line-650"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Place</span> <span class='hs-varid'>vab</span> <span class='hs-varid'>c</span>
<a name="line-651"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>va</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>i</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>a</span>
<a name="line-652"></a> <span class='hs-varid'>vab</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>va</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>b</span>
<a name="line-653"></a><span class='hs-definition'>lookupDigit</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span>
<a name="line-654"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>va</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Place</span> <span class='hs-varid'>i</span> <span class='hs-varid'>a</span>
<a name="line-655"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>vab</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Place</span> <span class='hs-varid'>va</span> <span class='hs-varid'>b</span>
<a name="line-656"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>vabc</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Place</span> <span class='hs-varid'>vab</span> <span class='hs-varid'>c</span>
<a name="line-657"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Place</span> <span class='hs-varid'>vabc</span> <span class='hs-varid'>d</span>
<a name="line-658"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>va</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>i</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>a</span>
<a name="line-659"></a> <span class='hs-varid'>vab</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>va</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>b</span>
<a name="line-660"></a> <span class='hs-varid'>vabc</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>vab</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>c</span>
<a name="line-661"></a>
<a name="line-662"></a><a name="update"></a><span class='hs-comment'>-- | /O(log(min(i,n-i)))/. Replace the element at the specified position</span>
<a name="line-663"></a><span class='hs-definition'>update</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span>
<a name="line-664"></a><span class='hs-definition'>update</span> <span class='hs-varid'>i</span> <span class='hs-varid'>x</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>adjust</span> <span class='hs-layout'>(</span><span class='hs-varid'>const</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varid'>i</span>
<a name="line-665"></a>
<a name="line-666"></a><a name="adjust"></a><span class='hs-comment'>-- | /O(log(min(i,n-i)))/. Update the element at the specified position</span>
<a name="line-667"></a><span class='hs-definition'>adjust</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span>
<a name="line-668"></a><span class='hs-definition'>adjust</span> <span class='hs-varid'>f</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-conid'>Seq</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span>
<a name="line-669"></a> <span class='hs-keyglyph'>|</span> <span class='hs-num'>0</span> <span class='hs-varop'><=</span> <span class='hs-varid'>i</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>i</span> <span class='hs-varop'><</span> <span class='hs-varid'>size</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Seq</span> <span class='hs-layout'>(</span><span class='hs-varid'>adjustTree</span> <span class='hs-layout'>(</span><span class='hs-varid'>const</span> <span class='hs-layout'>(</span><span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-comment'>-</span><span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span>
<a name="line-670"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>xs</span>
<a name="line-671"></a>
<a name="line-672"></a><a name="adjustTree"></a><span class='hs-comment'>{-# SPECIALIZE adjustTree :: (Int -> Elem a -> Elem a) -> Int -> FingerTree (Elem a) -> FingerTree (Elem a) #-}</span>
<a name="line-673"></a><span class='hs-comment'>{-# SPECIALIZE adjustTree :: (Int -> Node a -> Node a) -> Int -> FingerTree (Node a) -> FingerTree (Node a) #-}</span>
<a name="line-674"></a><span class='hs-definition'>adjustTree</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Sized</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-675"></a> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-varid'>a</span>
<a name="line-676"></a><span class='hs-definition'>adjustTree</span> <span class='hs-varid'>f</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Single</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>i</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span>
<a name="line-677"></a><span class='hs-definition'>adjustTree</span> <span class='hs-varid'>f</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-varid'>s</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m</span> <span class='hs-varid'>sf</span><span class='hs-layout'>)</span>
<a name="line-678"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>vpr</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Deep</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-varid'>adjustDigit</span> <span class='hs-varid'>f</span> <span class='hs-varid'>i</span> <span class='hs-varid'>pr</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span> <span class='hs-varid'>sf</span>
<a name="line-679"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>vm</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Deep</span> <span class='hs-varid'>s</span> <span class='hs-varid'>pr</span> <span class='hs-layout'>(</span><span class='hs-varid'>adjustTree</span> <span class='hs-layout'>(</span><span class='hs-varid'>adjustNode</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>vpr</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-varid'>sf</span>
<a name="line-680"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Deep</span> <span class='hs-varid'>s</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-varid'>adjustDigit</span> <span class='hs-varid'>f</span> <span class='hs-varid'>vm</span> <span class='hs-varid'>sf</span><span class='hs-layout'>)</span>
<a name="line-681"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>vpr</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>i</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>pr</span>
<a name="line-682"></a> <span class='hs-varid'>vm</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>vpr</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>m</span>
<a name="line-683"></a>
<a name="line-684"></a><a name="adjustNode"></a><span class='hs-comment'>{-# SPECIALIZE adjustNode :: (Int -> Elem a -> Elem a) -> Int -> Node (Elem a) -> Node (Elem a) #-}</span>
<a name="line-685"></a><span class='hs-comment'>{-# SPECIALIZE adjustNode :: (Int -> Node a -> Node a) -> Int -> Node (Node a) -> Node (Node a) #-}</span>
<a name="line-686"></a><span class='hs-definition'>adjustNode</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Sized</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Node</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Node</span> <span class='hs-varid'>a</span>
<a name="line-687"></a><span class='hs-definition'>adjustNode</span> <span class='hs-varid'>f</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node2</span> <span class='hs-varid'>s</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-688"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>va</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Node2</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>i</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span>
<a name="line-689"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Node2</span> <span class='hs-varid'>s</span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>va</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-690"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>va</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>i</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>a</span>
<a name="line-691"></a><span class='hs-definition'>adjustNode</span> <span class='hs-varid'>f</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node3</span> <span class='hs-varid'>s</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-692"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>va</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Node3</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>i</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span>
<a name="line-693"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>vab</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Node3</span> <span class='hs-varid'>s</span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>va</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span>
<a name="line-694"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Node3</span> <span class='hs-varid'>s</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>vab</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-695"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>va</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>i</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>a</span>
<a name="line-696"></a> <span class='hs-varid'>vab</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>va</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>b</span>
<a name="line-697"></a>
<a name="line-698"></a><a name="adjustDigit"></a><span class='hs-comment'>{-# SPECIALIZE adjustDigit :: (Int -> Elem a -> Elem a) -> Int -> Digit (Elem a) -> Digit (Elem a) #-}</span>
<a name="line-699"></a><span class='hs-comment'>{-# SPECIALIZE adjustDigit :: (Int -> Node a -> Node a) -> Int -> Digit (Node a) -> Digit (Node a) #-}</span>
<a name="line-700"></a><span class='hs-definition'>adjustDigit</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Sized</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Digit</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Digit</span> <span class='hs-varid'>a</span>
<a name="line-701"></a><span class='hs-definition'>adjustDigit</span> <span class='hs-varid'>f</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>One</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>i</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-702"></a><span class='hs-definition'>adjustDigit</span> <span class='hs-varid'>f</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-703"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>va</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Two</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>i</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span>
<a name="line-704"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>va</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-705"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>va</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>i</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>a</span>
<a name="line-706"></a><span class='hs-definition'>adjustDigit</span> <span class='hs-varid'>f</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-707"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>va</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Three</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>i</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span>
<a name="line-708"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>vab</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>va</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span>
<a name="line-709"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>vab</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-710"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>va</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>i</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>a</span>
<a name="line-711"></a> <span class='hs-varid'>vab</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>va</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>b</span>
<a name="line-712"></a><span class='hs-definition'>adjustDigit</span> <span class='hs-varid'>f</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span>
<a name="line-713"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>va</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Four</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>i</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span>
<a name="line-714"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>vab</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>va</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span>
<a name="line-715"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>vabc</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>vab</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>d</span>
<a name="line-716"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>vabc</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span>
<a name="line-717"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>va</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>i</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>a</span>
<a name="line-718"></a> <span class='hs-varid'>vab</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>va</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>b</span>
<a name="line-719"></a> <span class='hs-varid'>vabc</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>vab</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>c</span>
<a name="line-720"></a>
<a name="line-721"></a><span class='hs-comment'>-- Splitting</span>
<a name="line-722"></a>
<a name="line-723"></a><a name="take"></a><span class='hs-comment'>-- | /O(log(min(i,n-i)))/. The first @i@ elements of a sequence.</span>
<a name="line-724"></a><span class='hs-definition'>take</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span>
<a name="line-725"></a><span class='hs-definition'>take</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>fst</span> <span class='hs-varop'>.</span> <span class='hs-varid'>splitAt</span> <span class='hs-varid'>i</span>
<a name="line-726"></a>
<a name="line-727"></a><a name="drop"></a><span class='hs-comment'>-- | /O(log(min(i,n-i)))/. Elements of sequence after the first @i@.</span>
<a name="line-728"></a><span class='hs-definition'>drop</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span>
<a name="line-729"></a><span class='hs-definition'>drop</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>snd</span> <span class='hs-varop'>.</span> <span class='hs-varid'>splitAt</span> <span class='hs-varid'>i</span>
<a name="line-730"></a>
<a name="line-731"></a><a name="splitAt"></a><span class='hs-comment'>-- | /O(log(min(i,n-i)))/. Split a sequence at a given position.</span>
<a name="line-732"></a><span class='hs-definition'>splitAt</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-733"></a><span class='hs-definition'>splitAt</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-conid'>Seq</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-conid'>Seq</span> <span class='hs-varid'>l</span><span class='hs-layout'>,</span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span>
<a name="line-734"></a> <span class='hs-keyword'>where</span> <span class='hs-layout'>(</span><span class='hs-varid'>l</span><span class='hs-layout'>,</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>split</span> <span class='hs-varid'>i</span> <span class='hs-varid'>xs</span>
<a name="line-735"></a>
<a name="line-736"></a><a name="split"></a><span class='hs-definition'>split</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Elem</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span>
<a name="line-737"></a> <span class='hs-layout'>(</span><span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Elem</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Elem</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-738"></a><span class='hs-definition'>split</span> <span class='hs-varid'>i</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>i</span> <span class='hs-varop'>`seq`</span> <span class='hs-layout'>(</span><span class='hs-conid'>Empty</span><span class='hs-layout'>,</span> <span class='hs-conid'>Empty</span><span class='hs-layout'>)</span>
<a name="line-739"></a><span class='hs-definition'>split</span> <span class='hs-varid'>i</span> <span class='hs-varid'>xs</span>
<a name="line-740"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>size</span> <span class='hs-varid'>xs</span> <span class='hs-varop'>></span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>l</span><span class='hs-layout'>,</span> <span class='hs-varid'>consTree</span> <span class='hs-varid'>x</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span>
<a name="line-741"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>xs</span><span class='hs-layout'>,</span> <span class='hs-conid'>Empty</span><span class='hs-layout'>)</span>
<a name="line-742"></a> <span class='hs-keyword'>where</span> <span class='hs-conid'>Split</span> <span class='hs-varid'>l</span> <span class='hs-varid'>x</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>splitTree</span> <span class='hs-layout'>(</span><span class='hs-comment'>-</span><span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-varid'>xs</span>
<a name="line-743"></a>
<a name="line-744"></a><a name="Split"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Split</span> <span class='hs-varid'>t</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Split</span> <span class='hs-varid'>t</span> <span class='hs-varid'>a</span> <span class='hs-varid'>t</span>
<a name="line-745"></a><span class='hs-cpp'>#if TESTING</span>
<a name="line-746"></a> <span class='hs-keyword'>deriving</span> <span class='hs-conid'>Show</span>
<a name="line-747"></a><span class='hs-cpp'>#endif</span>
<a name="line-748"></a>
<a name="line-749"></a><a name="splitTree"></a><span class='hs-comment'>{-# SPECIALIZE splitTree :: Int -> FingerTree (Elem a) -> Split (FingerTree (Elem a)) (Elem a) #-}</span>
<a name="line-750"></a><span class='hs-comment'>{-# SPECIALIZE splitTree :: Int -> FingerTree (Node a) -> Split (FingerTree (Node a)) (Node a) #-}</span>
<a name="line-751"></a><span class='hs-definition'>splitTree</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Sized</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Split</span> <span class='hs-layout'>(</span><span class='hs-conid'>FingerTree</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span>
<a name="line-752"></a><span class='hs-definition'>splitTree</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>i</span> <span class='hs-varop'>`seq`</span> <span class='hs-conid'>Split</span> <span class='hs-conid'>Empty</span> <span class='hs-varid'>x</span> <span class='hs-conid'>Empty</span>
<a name="line-753"></a><span class='hs-definition'>splitTree</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m</span> <span class='hs-varid'>sf</span><span class='hs-layout'>)</span>
<a name="line-754"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>vpr</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>splitDigit</span> <span class='hs-varid'>i</span> <span class='hs-varid'>pr</span> <span class='hs-keyword'>of</span>
<a name="line-755"></a> <span class='hs-conid'>Split</span> <span class='hs-varid'>l</span> <span class='hs-varid'>x</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Split</span> <span class='hs-layout'>(</span><span class='hs-varid'>maybe</span> <span class='hs-conid'>Empty</span> <span class='hs-varid'>digitToTree</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-varid'>x</span> <span class='hs-layout'>(</span><span class='hs-varid'>deepL</span> <span class='hs-varid'>r</span> <span class='hs-varid'>m</span> <span class='hs-varid'>sf</span><span class='hs-layout'>)</span>
<a name="line-756"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>vm</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>splitTree</span> <span class='hs-varid'>vpr</span> <span class='hs-varid'>m</span> <span class='hs-keyword'>of</span>
<a name="line-757"></a> <span class='hs-conid'>Split</span> <span class='hs-varid'>ml</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>mr</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-varid'>splitNode</span> <span class='hs-layout'>(</span><span class='hs-varid'>vpr</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>ml</span><span class='hs-layout'>)</span> <span class='hs-varid'>xs</span> <span class='hs-keyword'>of</span>
<a name="line-758"></a> <span class='hs-conid'>Split</span> <span class='hs-varid'>l</span> <span class='hs-varid'>x</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Split</span> <span class='hs-layout'>(</span><span class='hs-varid'>deepR</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>ml</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-varid'>x</span> <span class='hs-layout'>(</span><span class='hs-varid'>deepL</span> <span class='hs-varid'>r</span> <span class='hs-varid'>mr</span> <span class='hs-varid'>sf</span><span class='hs-layout'>)</span>
<a name="line-759"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>splitDigit</span> <span class='hs-varid'>vm</span> <span class='hs-varid'>sf</span> <span class='hs-keyword'>of</span>
<a name="line-760"></a> <span class='hs-conid'>Split</span> <span class='hs-varid'>l</span> <span class='hs-varid'>x</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Split</span> <span class='hs-layout'>(</span><span class='hs-varid'>deepR</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m</span> <span class='hs-varid'>l</span><span class='hs-layout'>)</span> <span class='hs-varid'>x</span> <span class='hs-layout'>(</span><span class='hs-varid'>maybe</span> <span class='hs-conid'>Empty</span> <span class='hs-varid'>digitToTree</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span>
<a name="line-761"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>vpr</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>i</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>pr</span>
<a name="line-762"></a> <span class='hs-varid'>vm</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>vpr</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>m</span>
<a name="line-763"></a>
<a name="line-764"></a><a name="deepL"></a><span class='hs-comment'>{-# SPECIALIZE deepL :: Maybe (Digit (Elem a)) -> FingerTree (Node (Elem a)) -> Digit (Elem a) -> FingerTree (Elem a) #-}</span>
<a name="line-765"></a><span class='hs-comment'>{-# SPECIALIZE deepL :: Maybe (Digit (Node a)) -> FingerTree (Node (Node a)) -> Digit (Node a) -> FingerTree (Node a) #-}</span>
<a name="line-766"></a><span class='hs-definition'>deepL</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Sized</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>Digit</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Digit</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-varid'>a</span>
<a name="line-767"></a><span class='hs-definition'>deepL</span> <span class='hs-conid'>Nothing</span> <span class='hs-varid'>m</span> <span class='hs-varid'>sf</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>viewLTree</span> <span class='hs-varid'>m</span> <span class='hs-keyword'>of</span>
<a name="line-768"></a> <span class='hs-conid'>Nothing2</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>digitToTree</span> <span class='hs-varid'>sf</span>
<a name="line-769"></a> <span class='hs-conid'>Just2</span> <span class='hs-varid'>a</span> <span class='hs-varid'>m'</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>deep</span> <span class='hs-layout'>(</span><span class='hs-varid'>nodeToDigit</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>m'</span> <span class='hs-varid'>sf</span>
<a name="line-770"></a><span class='hs-definition'>deepL</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>pr</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span> <span class='hs-varid'>sf</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>deep</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m</span> <span class='hs-varid'>sf</span>
<a name="line-771"></a>
<a name="line-772"></a><a name="deepR"></a><span class='hs-comment'>{-# SPECIALIZE deepR :: Digit (Elem a) -> FingerTree (Node (Elem a)) -> Maybe (Digit (Elem a)) -> FingerTree (Elem a) #-}</span>
<a name="line-773"></a><span class='hs-comment'>{-# SPECIALIZE deepR :: Digit (Node a) -> FingerTree (Node (Node a)) -> Maybe (Digit (Node a)) -> FingerTree (Node a) #-}</span>
<a name="line-774"></a><span class='hs-definition'>deepR</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Sized</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Digit</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>Digit</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-varid'>a</span>
<a name="line-775"></a><span class='hs-definition'>deepR</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m</span> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>=</span> <span class='hs-keyword'>case</span> <span class='hs-varid'>viewRTree</span> <span class='hs-varid'>m</span> <span class='hs-keyword'>of</span>
<a name="line-776"></a> <span class='hs-conid'>Nothing2</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>digitToTree</span> <span class='hs-varid'>pr</span>
<a name="line-777"></a> <span class='hs-conid'>Just2</span> <span class='hs-varid'>m'</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>deep</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m'</span> <span class='hs-layout'>(</span><span class='hs-varid'>nodeToDigit</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-778"></a><span class='hs-definition'>deepR</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>sf</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>deep</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m</span> <span class='hs-varid'>sf</span>
<a name="line-779"></a>
<a name="line-780"></a><a name="splitNode"></a><span class='hs-comment'>{-# SPECIALIZE splitNode :: Int -> Node (Elem a) -> Split (Maybe (Digit (Elem a))) (Elem a) #-}</span>
<a name="line-781"></a><span class='hs-comment'>{-# SPECIALIZE splitNode :: Int -> Node (Node a) -> Split (Maybe (Digit (Node a))) (Node a) #-}</span>
<a name="line-782"></a><span class='hs-definition'>splitNode</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Sized</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Node</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Split</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>Digit</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span>
<a name="line-783"></a><span class='hs-definition'>splitNode</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node2</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-784"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>va</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Split</span> <span class='hs-conid'>Nothing</span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-785"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Split</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span> <span class='hs-conid'>Nothing</span>
<a name="line-786"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>va</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>i</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>a</span>
<a name="line-787"></a><span class='hs-definition'>splitNode</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node3</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-788"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>va</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Split</span> <span class='hs-conid'>Nothing</span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-789"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>vab</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Split</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-790"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Split</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span> <span class='hs-conid'>Nothing</span>
<a name="line-791"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>va</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>i</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>a</span>
<a name="line-792"></a> <span class='hs-varid'>vab</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>va</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>b</span>
<a name="line-793"></a>
<a name="line-794"></a><a name="splitDigit"></a><span class='hs-comment'>{-# SPECIALIZE splitDigit :: Int -> Digit (Elem a) -> Split (Maybe (Digit (Elem a))) (Elem a) #-}</span>
<a name="line-795"></a><span class='hs-comment'>{-# SPECIALIZE splitDigit :: Int -> Digit (Node a) -> Split (Maybe (Digit (Node a))) (Node a) #-}</span>
<a name="line-796"></a><span class='hs-definition'>splitDigit</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Sized</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Digit</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Split</span> <span class='hs-layout'>(</span><span class='hs-conid'>Maybe</span> <span class='hs-layout'>(</span><span class='hs-conid'>Digit</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span>
<a name="line-797"></a><span class='hs-definition'>splitDigit</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>i</span> <span class='hs-varop'>`seq`</span> <span class='hs-conid'>Split</span> <span class='hs-conid'>Nothing</span> <span class='hs-varid'>a</span> <span class='hs-conid'>Nothing</span>
<a name="line-798"></a><span class='hs-definition'>splitDigit</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-799"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>va</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Split</span> <span class='hs-conid'>Nothing</span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-800"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Split</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span> <span class='hs-conid'>Nothing</span>
<a name="line-801"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>va</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>i</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>a</span>
<a name="line-802"></a><span class='hs-definition'>splitDigit</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-803"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>va</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Split</span> <span class='hs-conid'>Nothing</span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-804"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>vab</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Split</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-805"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Split</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span> <span class='hs-conid'>Nothing</span>
<a name="line-806"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>va</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>i</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>a</span>
<a name="line-807"></a> <span class='hs-varid'>vab</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>va</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>b</span>
<a name="line-808"></a><span class='hs-definition'>splitDigit</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span>
<a name="line-809"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>va</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Split</span> <span class='hs-conid'>Nothing</span> <span class='hs-varid'>a</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-810"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>vab</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Split</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>b</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-811"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>vabc</span> <span class='hs-varop'>></span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Split</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-812"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Split</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>d</span> <span class='hs-conid'>Nothing</span>
<a name="line-813"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>va</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>i</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>a</span>
<a name="line-814"></a> <span class='hs-varid'>vab</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>va</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>b</span>
<a name="line-815"></a> <span class='hs-varid'>vabc</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>vab</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>c</span>
<a name="line-816"></a>
<a name="line-817"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-818"></a><span class='hs-comment'>-- Lists</span>
<a name="line-819"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-820"></a>
<a name="line-821"></a><a name="fromList"></a><span class='hs-comment'>-- | /O(n)/. Create a sequence from a finite list of elements.</span>
<a name="line-822"></a><span class='hs-definition'>fromList</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span>
<a name="line-823"></a><span class='hs-definition'>fromList</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>List</span><span class='hs-varop'>.</span><span class='hs-varid'>foldl'</span> <span class='hs-layout'>(</span><span class='hs-varop'>|></span><span class='hs-layout'>)</span> <span class='hs-varid'>empty</span>
<a name="line-824"></a>
<a name="line-825"></a><a name="toList"></a><span class='hs-comment'>-- | /O(n)/. List of elements of the sequence.</span>
<a name="line-826"></a><span class='hs-definition'>toList</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyglyph'>[</span><span class='hs-varid'>a</span><span class='hs-keyglyph'>]</span>
<a name="line-827"></a><span class='hs-definition'>toList</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldr</span> <span class='hs-layout'>(</span><span class='hs-conop'>:</span><span class='hs-layout'>)</span> <span class='hs-conid'>[]</span>
<a name="line-828"></a>
<a name="line-829"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-830"></a><span class='hs-comment'>-- Folds</span>
<a name="line-831"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-832"></a>
<a name="line-833"></a><a name="foldr"></a><span class='hs-comment'>-- | /O(n*t)/. Fold over the elements of a sequence,</span>
<a name="line-834"></a><span class='hs-comment'>-- associating to the right.</span>
<a name="line-835"></a><span class='hs-definition'>foldr</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span>
<a name="line-836"></a><span class='hs-definition'>foldr</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-layout'>(</span><span class='hs-conid'>Seq</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldrTree</span> <span class='hs-varid'>f'</span> <span class='hs-varid'>z</span> <span class='hs-varid'>xs</span>
<a name="line-837"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>f'</span> <span class='hs-layout'>(</span><span class='hs-conid'>Elem</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-varid'>y</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span>
<a name="line-838"></a>
<a name="line-839"></a><a name="foldrTree"></a><span class='hs-definition'>foldrTree</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span>
<a name="line-840"></a><span class='hs-definition'>foldrTree</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>z</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>z</span>
<a name="line-841"></a><span class='hs-definition'>foldrTree</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span> <span class='hs-varop'>`f`</span> <span class='hs-varid'>z</span>
<a name="line-842"></a><span class='hs-definition'>foldrTree</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m</span> <span class='hs-varid'>sf</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-843"></a> <span class='hs-varid'>foldrDigit</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>foldrTree</span> <span class='hs-layout'>(</span><span class='hs-varid'>flip</span> <span class='hs-layout'>(</span><span class='hs-varid'>foldrNode</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>foldrDigit</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-varid'>sf</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-varid'>pr</span>
<a name="line-844"></a>
<a name="line-845"></a><a name="foldrDigit"></a><span class='hs-definition'>foldrDigit</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Digit</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span>
<a name="line-846"></a><span class='hs-definition'>foldrDigit</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>a</span> <span class='hs-varop'>`f`</span> <span class='hs-varid'>z</span>
<a name="line-847"></a><span class='hs-definition'>foldrDigit</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>a</span> <span class='hs-varop'>`f`</span> <span class='hs-layout'>(</span><span class='hs-varid'>b</span> <span class='hs-varop'>`f`</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span>
<a name="line-848"></a><span class='hs-definition'>foldrDigit</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>a</span> <span class='hs-varop'>`f`</span> <span class='hs-layout'>(</span><span class='hs-varid'>b</span> <span class='hs-varop'>`f`</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span> <span class='hs-varop'>`f`</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-849"></a><span class='hs-definition'>foldrDigit</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>a</span> <span class='hs-varop'>`f`</span> <span class='hs-layout'>(</span><span class='hs-varid'>b</span> <span class='hs-varop'>`f`</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span> <span class='hs-varop'>`f`</span> <span class='hs-layout'>(</span><span class='hs-varid'>d</span> <span class='hs-varop'>`f`</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-850"></a>
<a name="line-851"></a><a name="foldrNode"></a><span class='hs-definition'>foldrNode</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Node</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span>
<a name="line-852"></a><span class='hs-definition'>foldrNode</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node2</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>a</span> <span class='hs-varop'>`f`</span> <span class='hs-layout'>(</span><span class='hs-varid'>b</span> <span class='hs-varop'>`f`</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span>
<a name="line-853"></a><span class='hs-definition'>foldrNode</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node3</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>a</span> <span class='hs-varop'>`f`</span> <span class='hs-layout'>(</span><span class='hs-varid'>b</span> <span class='hs-varop'>`f`</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span> <span class='hs-varop'>`f`</span> <span class='hs-varid'>z</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-854"></a>
<a name="line-855"></a><a name="foldr1"></a><span class='hs-comment'>-- | /O(n*t)/. A variant of 'foldr' that has no base case,</span>
<a name="line-856"></a><span class='hs-comment'>-- and thus may only be applied to non-empty sequences.</span>
<a name="line-857"></a><span class='hs-definition'>foldr1</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-858"></a><span class='hs-definition'>foldr1</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Seq</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>getElem</span> <span class='hs-layout'>(</span><span class='hs-varid'>foldr1Tree</span> <span class='hs-varid'>f'</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span>
<a name="line-859"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>f'</span> <span class='hs-layout'>(</span><span class='hs-conid'>Elem</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Elem</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Elem</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span>
<a name="line-860"></a>
<a name="line-861"></a><a name="foldr1Tree"></a><span class='hs-definition'>foldr1Tree</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-862"></a><span class='hs-definition'>foldr1Tree</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>error</span> <span class='hs-str'>"foldr1: empty sequence"</span>
<a name="line-863"></a><span class='hs-definition'>foldr1Tree</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span>
<a name="line-864"></a><span class='hs-definition'>foldr1Tree</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m</span> <span class='hs-varid'>sf</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-865"></a> <span class='hs-varid'>foldrDigit</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>foldrTree</span> <span class='hs-layout'>(</span><span class='hs-varid'>flip</span> <span class='hs-layout'>(</span><span class='hs-varid'>foldrNode</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>foldr1Digit</span> <span class='hs-varid'>f</span> <span class='hs-varid'>sf</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-varid'>pr</span>
<a name="line-866"></a>
<a name="line-867"></a><a name="foldr1Digit"></a><span class='hs-definition'>foldr1Digit</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Digit</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-868"></a><span class='hs-definition'>foldr1Digit</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>a</span>
<a name="line-869"></a><span class='hs-definition'>foldr1Digit</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>a</span> <span class='hs-varop'>`f`</span> <span class='hs-varid'>b</span>
<a name="line-870"></a><span class='hs-definition'>foldr1Digit</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>a</span> <span class='hs-varop'>`f`</span> <span class='hs-layout'>(</span><span class='hs-varid'>b</span> <span class='hs-varop'>`f`</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-871"></a><span class='hs-definition'>foldr1Digit</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>a</span> <span class='hs-varop'>`f`</span> <span class='hs-layout'>(</span><span class='hs-varid'>b</span> <span class='hs-varop'>`f`</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span> <span class='hs-varop'>`f`</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-872"></a>
<a name="line-873"></a><a name="foldl"></a><span class='hs-comment'>-- | /O(n*t)/. Fold over the elements of a sequence,</span>
<a name="line-874"></a><span class='hs-comment'>-- associating to the left.</span>
<a name="line-875"></a><span class='hs-definition'>foldl</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-876"></a><span class='hs-definition'>foldl</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-layout'>(</span><span class='hs-conid'>Seq</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldlTree</span> <span class='hs-varid'>f'</span> <span class='hs-varid'>z</span> <span class='hs-varid'>xs</span>
<a name="line-877"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>f'</span> <span class='hs-varid'>x</span> <span class='hs-layout'>(</span><span class='hs-conid'>Elem</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span>
<a name="line-878"></a>
<a name="line-879"></a><a name="foldlTree"></a><span class='hs-definition'>foldlTree</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-880"></a><span class='hs-definition'>foldlTree</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>z</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>z</span>
<a name="line-881"></a><span class='hs-definition'>foldlTree</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>z</span> <span class='hs-varop'>`f`</span> <span class='hs-varid'>x</span>
<a name="line-882"></a><span class='hs-definition'>foldlTree</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m</span> <span class='hs-varid'>sf</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-883"></a> <span class='hs-varid'>foldlDigit</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>foldlTree</span> <span class='hs-layout'>(</span><span class='hs-varid'>foldlNode</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>foldlDigit</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-varid'>pr</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-varid'>sf</span>
<a name="line-884"></a>
<a name="line-885"></a><a name="foldlDigit"></a><span class='hs-definition'>foldlDigit</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Digit</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-886"></a><span class='hs-definition'>foldlDigit</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>z</span> <span class='hs-varop'>`f`</span> <span class='hs-varid'>a</span>
<a name="line-887"></a><span class='hs-definition'>foldlDigit</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>z</span> <span class='hs-varop'>`f`</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varop'>`f`</span> <span class='hs-varid'>b</span>
<a name="line-888"></a><span class='hs-definition'>foldlDigit</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>z</span> <span class='hs-varop'>`f`</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varop'>`f`</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varop'>`f`</span> <span class='hs-varid'>c</span>
<a name="line-889"></a><span class='hs-definition'>foldlDigit</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>z</span> <span class='hs-varop'>`f`</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varop'>`f`</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varop'>`f`</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varop'>`f`</span> <span class='hs-varid'>d</span>
<a name="line-890"></a>
<a name="line-891"></a><a name="foldlNode"></a><span class='hs-definition'>foldlNode</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Node</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-892"></a><span class='hs-definition'>foldlNode</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node2</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>z</span> <span class='hs-varop'>`f`</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varop'>`f`</span> <span class='hs-varid'>b</span>
<a name="line-893"></a><span class='hs-definition'>foldlNode</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node3</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>z</span> <span class='hs-varop'>`f`</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varop'>`f`</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varop'>`f`</span> <span class='hs-varid'>c</span>
<a name="line-894"></a>
<a name="line-895"></a><a name="foldl1"></a><span class='hs-comment'>-- | /O(n*t)/. A variant of 'foldl' that has no base case,</span>
<a name="line-896"></a><span class='hs-comment'>-- and thus may only be applied to non-empty sequences.</span>
<a name="line-897"></a><span class='hs-definition'>foldl1</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-898"></a><span class='hs-definition'>foldl1</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Seq</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>getElem</span> <span class='hs-layout'>(</span><span class='hs-varid'>foldl1Tree</span> <span class='hs-varid'>f'</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span>
<a name="line-899"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>f'</span> <span class='hs-layout'>(</span><span class='hs-conid'>Elem</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Elem</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Elem</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>x</span> <span class='hs-varid'>y</span><span class='hs-layout'>)</span>
<a name="line-900"></a>
<a name="line-901"></a><a name="foldl1Tree"></a><span class='hs-definition'>foldl1Tree</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-902"></a><span class='hs-definition'>foldl1Tree</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>error</span> <span class='hs-str'>"foldl1: empty sequence"</span>
<a name="line-903"></a><span class='hs-definition'>foldl1Tree</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>x</span>
<a name="line-904"></a><span class='hs-definition'>foldl1Tree</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m</span> <span class='hs-varid'>sf</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-905"></a> <span class='hs-varid'>foldlDigit</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>foldlTree</span> <span class='hs-layout'>(</span><span class='hs-varid'>foldlNode</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>foldl1Digit</span> <span class='hs-varid'>f</span> <span class='hs-varid'>pr</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-varid'>sf</span>
<a name="line-906"></a>
<a name="line-907"></a><a name="foldl1Digit"></a><span class='hs-definition'>foldl1Digit</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Digit</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-908"></a><span class='hs-definition'>foldl1Digit</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>a</span>
<a name="line-909"></a><span class='hs-definition'>foldl1Digit</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>a</span> <span class='hs-varop'>`f`</span> <span class='hs-varid'>b</span>
<a name="line-910"></a><span class='hs-definition'>foldl1Digit</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varop'>`f`</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varop'>`f`</span> <span class='hs-varid'>c</span>
<a name="line-911"></a><span class='hs-definition'>foldl1Digit</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-varop'>`f`</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-varop'>`f`</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varop'>`f`</span> <span class='hs-varid'>d</span>
<a name="line-912"></a>
<a name="line-913"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-914"></a><span class='hs-comment'>-- Derived folds</span>
<a name="line-915"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-916"></a>
<a name="line-917"></a><a name="foldr'"></a><span class='hs-comment'>-- | /O(n*t)/. Fold over the elements of a sequence,</span>
<a name="line-918"></a><span class='hs-comment'>-- associating to the right, but strictly.</span>
<a name="line-919"></a><span class='hs-definition'>foldr'</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span>
<a name="line-920"></a><span class='hs-definition'>foldr'</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldl</span> <span class='hs-varid'>f'</span> <span class='hs-varid'>id</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>z</span>
<a name="line-921"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>f'</span> <span class='hs-varid'>k</span> <span class='hs-varid'>x</span> <span class='hs-varid'>z</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>k</span> <span class='hs-varop'>$!</span> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span> <span class='hs-varid'>z</span>
<a name="line-922"></a>
<a name="line-923"></a><a name="foldrM"></a><span class='hs-comment'>-- | /O(n*t)/. Monadic fold over the elements of a sequence,</span>
<a name="line-924"></a><span class='hs-comment'>-- associating to the right, i.e. from right to left.</span>
<a name="line-925"></a><span class='hs-definition'>foldrM</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>m</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>m</span> <span class='hs-varid'>b</span>
<a name="line-926"></a><span class='hs-definition'>foldrM</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldl</span> <span class='hs-varid'>f'</span> <span class='hs-varid'>return</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>z</span>
<a name="line-927"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>f'</span> <span class='hs-varid'>k</span> <span class='hs-varid'>x</span> <span class='hs-varid'>z</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-varid'>x</span> <span class='hs-varid'>z</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>k</span>
<a name="line-928"></a>
<a name="line-929"></a><a name="foldl'"></a><span class='hs-comment'>-- | /O(n*t)/. Fold over the elements of a sequence,</span>
<a name="line-930"></a><span class='hs-comment'>-- associating to the right, but strictly.</span>
<a name="line-931"></a><span class='hs-definition'>foldl'</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-932"></a><span class='hs-definition'>foldl'</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldr</span> <span class='hs-varid'>f'</span> <span class='hs-varid'>id</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>z</span>
<a name="line-933"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>f'</span> <span class='hs-varid'>x</span> <span class='hs-varid'>k</span> <span class='hs-varid'>z</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>k</span> <span class='hs-varop'>$!</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-varid'>x</span>
<a name="line-934"></a>
<a name="line-935"></a><a name="foldlM"></a><span class='hs-comment'>-- | /O(n*t)/. Monadic fold over the elements of a sequence,</span>
<a name="line-936"></a><span class='hs-comment'>-- associating to the left, i.e. from left to right.</span>
<a name="line-937"></a><span class='hs-definition'>foldlM</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>m</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>m</span> <span class='hs-varid'>a</span>
<a name="line-938"></a><span class='hs-definition'>foldlM</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-varid'>xs</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>foldr</span> <span class='hs-varid'>f'</span> <span class='hs-varid'>return</span> <span class='hs-varid'>xs</span> <span class='hs-varid'>z</span>
<a name="line-939"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>f'</span> <span class='hs-varid'>x</span> <span class='hs-varid'>k</span> <span class='hs-varid'>z</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-varid'>z</span> <span class='hs-varid'>x</span> <span class='hs-varop'>>>=</span> <span class='hs-varid'>k</span>
<a name="line-940"></a>
<a name="line-941"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-942"></a><span class='hs-comment'>-- Reverse</span>
<a name="line-943"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-944"></a>
<a name="line-945"></a><a name="reverse"></a><span class='hs-comment'>-- | /O(n)/. The reverse of a sequence.</span>
<a name="line-946"></a><span class='hs-definition'>reverse</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span>
<a name="line-947"></a><span class='hs-definition'>reverse</span> <span class='hs-layout'>(</span><span class='hs-conid'>Seq</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Seq</span> <span class='hs-layout'>(</span><span class='hs-varid'>reverseTree</span> <span class='hs-varid'>id</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span>
<a name="line-948"></a>
<a name="line-949"></a><a name="reverseTree"></a><span class='hs-definition'>reverseTree</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>FingerTree</span> <span class='hs-varid'>a</span>
<a name="line-950"></a><span class='hs-definition'>reverseTree</span> <span class='hs-keyword'>_</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Empty</span>
<a name="line-951"></a><span class='hs-definition'>reverseTree</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Single</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span>
<a name="line-952"></a><span class='hs-definition'>reverseTree</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-varid'>s</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m</span> <span class='hs-varid'>sf</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-953"></a> <span class='hs-conid'>Deep</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-varid'>reverseDigit</span> <span class='hs-varid'>f</span> <span class='hs-varid'>sf</span><span class='hs-layout'>)</span>
<a name="line-954"></a> <span class='hs-layout'>(</span><span class='hs-varid'>reverseTree</span> <span class='hs-layout'>(</span><span class='hs-varid'>reverseNode</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span>
<a name="line-955"></a> <span class='hs-layout'>(</span><span class='hs-varid'>reverseDigit</span> <span class='hs-varid'>f</span> <span class='hs-varid'>pr</span><span class='hs-layout'>)</span>
<a name="line-956"></a>
<a name="line-957"></a><a name="reverseDigit"></a><span class='hs-definition'>reverseDigit</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Digit</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Digit</span> <span class='hs-varid'>a</span>
<a name="line-958"></a><span class='hs-definition'>reverseDigit</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>One</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-959"></a><span class='hs-definition'>reverseDigit</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Two</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-960"></a><span class='hs-definition'>reverseDigit</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Three</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-961"></a><span class='hs-definition'>reverseDigit</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Four</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-962"></a>
<a name="line-963"></a><a name="reverseNode"></a><span class='hs-definition'>reverseNode</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Node</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Node</span> <span class='hs-varid'>a</span>
<a name="line-964"></a><span class='hs-definition'>reverseNode</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node2</span> <span class='hs-varid'>s</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Node2</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-965"></a><span class='hs-definition'>reverseNode</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node3</span> <span class='hs-varid'>s</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Node3</span> <span class='hs-varid'>s</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-966"></a>
<a name="line-967"></a><span class='hs-cpp'>#if TESTING</span>
<a name="line-968"></a>
<a name="line-969"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-970"></a><span class='hs-comment'>-- QuickCheck</span>
<a name="line-971"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-972"></a>
<a name="line-973"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Arbitrary</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Arbitrary</span> <span class='hs-layout'>(</span><span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-974"></a> <span class='hs-varid'>arbitrary</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>liftM</span> <span class='hs-conid'>Seq</span> <span class='hs-varid'>arbitrary</span>
<a name="line-975"></a> <span class='hs-varid'>coarbitrary</span> <span class='hs-layout'>(</span><span class='hs-conid'>Seq</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>coarbitrary</span> <span class='hs-varid'>x</span>
<a name="line-976"></a>
<a name="line-977"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Arbitrary</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Arbitrary</span> <span class='hs-layout'>(</span><span class='hs-conid'>Elem</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-978"></a> <span class='hs-varid'>arbitrary</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>liftM</span> <span class='hs-conid'>Elem</span> <span class='hs-varid'>arbitrary</span>
<a name="line-979"></a> <span class='hs-varid'>coarbitrary</span> <span class='hs-layout'>(</span><span class='hs-conid'>Elem</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>coarbitrary</span> <span class='hs-varid'>x</span>
<a name="line-980"></a>
<a name="line-981"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>Arbitrary</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Sized</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Arbitrary</span> <span class='hs-layout'>(</span><span class='hs-conid'>FingerTree</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-982"></a> <span class='hs-varid'>arbitrary</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>sized</span> <span class='hs-varid'>arb</span>
<a name="line-983"></a> <span class='hs-keyword'>where</span> <span class='hs-varid'>arb</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Arbitrary</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Sized</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Gen</span> <span class='hs-layout'>(</span><span class='hs-conid'>FingerTree</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-984"></a> <span class='hs-varid'>arb</span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>return</span> <span class='hs-conid'>Empty</span>
<a name="line-985"></a> <span class='hs-varid'>arb</span> <span class='hs-num'>1</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>liftM</span> <span class='hs-conid'>Single</span> <span class='hs-varid'>arbitrary</span>
<a name="line-986"></a> <span class='hs-varid'>arb</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>liftM3</span> <span class='hs-varid'>deep</span> <span class='hs-varid'>arbitrary</span> <span class='hs-layout'>(</span><span class='hs-varid'>arb</span> <span class='hs-layout'>(</span><span class='hs-varid'>n</span> <span class='hs-varop'>`div`</span> <span class='hs-num'>2</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-varid'>arbitrary</span>
<a name="line-987"></a>
<a name="line-988"></a> <span class='hs-varid'>coarbitrary</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>variant</span> <span class='hs-num'>0</span>
<a name="line-989"></a> <span class='hs-varid'>coarbitrary</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>variant</span> <span class='hs-num'>1</span> <span class='hs-varop'>.</span> <span class='hs-varid'>coarbitrary</span> <span class='hs-varid'>x</span>
<a name="line-990"></a> <span class='hs-varid'>coarbitrary</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m</span> <span class='hs-varid'>sf</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-991"></a> <span class='hs-varid'>variant</span> <span class='hs-num'>2</span> <span class='hs-varop'>.</span> <span class='hs-varid'>coarbitrary</span> <span class='hs-varid'>pr</span> <span class='hs-varop'>.</span> <span class='hs-varid'>coarbitrary</span> <span class='hs-varid'>m</span> <span class='hs-varop'>.</span> <span class='hs-varid'>coarbitrary</span> <span class='hs-varid'>sf</span>
<a name="line-992"></a>
<a name="line-993"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>Arbitrary</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Sized</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Arbitrary</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-994"></a> <span class='hs-varid'>arbitrary</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>oneof</span> <span class='hs-keyglyph'>[</span>
<a name="line-995"></a> <span class='hs-varid'>liftM2</span> <span class='hs-varid'>node2</span> <span class='hs-varid'>arbitrary</span> <span class='hs-varid'>arbitrary</span><span class='hs-layout'>,</span>
<a name="line-996"></a> <span class='hs-varid'>liftM3</span> <span class='hs-varid'>node3</span> <span class='hs-varid'>arbitrary</span> <span class='hs-varid'>arbitrary</span> <span class='hs-varid'>arbitrary</span><span class='hs-keyglyph'>]</span>
<a name="line-997"></a>
<a name="line-998"></a> <span class='hs-varid'>coarbitrary</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node2</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>variant</span> <span class='hs-num'>0</span> <span class='hs-varop'>.</span> <span class='hs-varid'>coarbitrary</span> <span class='hs-varid'>a</span> <span class='hs-varop'>.</span> <span class='hs-varid'>coarbitrary</span> <span class='hs-varid'>b</span>
<a name="line-999"></a> <span class='hs-varid'>coarbitrary</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node3</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-1000"></a> <span class='hs-varid'>variant</span> <span class='hs-num'>1</span> <span class='hs-varop'>.</span> <span class='hs-varid'>coarbitrary</span> <span class='hs-varid'>a</span> <span class='hs-varop'>.</span> <span class='hs-varid'>coarbitrary</span> <span class='hs-varid'>b</span> <span class='hs-varop'>.</span> <span class='hs-varid'>coarbitrary</span> <span class='hs-varid'>c</span>
<a name="line-1001"></a>
<a name="line-1002"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Arbitrary</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Arbitrary</span> <span class='hs-layout'>(</span><span class='hs-conid'>Digit</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-1003"></a> <span class='hs-varid'>arbitrary</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>oneof</span> <span class='hs-keyglyph'>[</span>
<a name="line-1004"></a> <span class='hs-varid'>liftM</span> <span class='hs-conid'>One</span> <span class='hs-varid'>arbitrary</span><span class='hs-layout'>,</span>
<a name="line-1005"></a> <span class='hs-varid'>liftM2</span> <span class='hs-conid'>Two</span> <span class='hs-varid'>arbitrary</span> <span class='hs-varid'>arbitrary</span><span class='hs-layout'>,</span>
<a name="line-1006"></a> <span class='hs-varid'>liftM3</span> <span class='hs-conid'>Three</span> <span class='hs-varid'>arbitrary</span> <span class='hs-varid'>arbitrary</span> <span class='hs-varid'>arbitrary</span><span class='hs-layout'>,</span>
<a name="line-1007"></a> <span class='hs-varid'>liftM4</span> <span class='hs-conid'>Four</span> <span class='hs-varid'>arbitrary</span> <span class='hs-varid'>arbitrary</span> <span class='hs-varid'>arbitrary</span> <span class='hs-varid'>arbitrary</span><span class='hs-keyglyph'>]</span>
<a name="line-1008"></a>
<a name="line-1009"></a> <span class='hs-varid'>coarbitrary</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>variant</span> <span class='hs-num'>0</span> <span class='hs-varop'>.</span> <span class='hs-varid'>coarbitrary</span> <span class='hs-varid'>a</span>
<a name="line-1010"></a> <span class='hs-varid'>coarbitrary</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>variant</span> <span class='hs-num'>1</span> <span class='hs-varop'>.</span> <span class='hs-varid'>coarbitrary</span> <span class='hs-varid'>a</span> <span class='hs-varop'>.</span> <span class='hs-varid'>coarbitrary</span> <span class='hs-varid'>b</span>
<a name="line-1011"></a> <span class='hs-varid'>coarbitrary</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-1012"></a> <span class='hs-varid'>variant</span> <span class='hs-num'>2</span> <span class='hs-varop'>.</span> <span class='hs-varid'>coarbitrary</span> <span class='hs-varid'>a</span> <span class='hs-varop'>.</span> <span class='hs-varid'>coarbitrary</span> <span class='hs-varid'>b</span> <span class='hs-varop'>.</span> <span class='hs-varid'>coarbitrary</span> <span class='hs-varid'>c</span>
<a name="line-1013"></a> <span class='hs-varid'>coarbitrary</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-1014"></a> <span class='hs-varid'>variant</span> <span class='hs-num'>3</span> <span class='hs-varop'>.</span> <span class='hs-varid'>coarbitrary</span> <span class='hs-varid'>a</span> <span class='hs-varop'>.</span> <span class='hs-varid'>coarbitrary</span> <span class='hs-varid'>b</span> <span class='hs-varop'>.</span> <span class='hs-varid'>coarbitrary</span> <span class='hs-varid'>c</span> <span class='hs-varop'>.</span> <span class='hs-varid'>coarbitrary</span> <span class='hs-varid'>d</span>
<a name="line-1015"></a>
<a name="line-1016"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-1017"></a><span class='hs-comment'>-- Valid trees</span>
<a name="line-1018"></a><span class='hs-comment'>------------------------------------------------------------------------</span>
<a name="line-1019"></a>
<a name="line-1020"></a><a name="Valid"></a><span class='hs-keyword'>class</span> <span class='hs-conid'>Valid</span> <span class='hs-varid'>a</span> <span class='hs-keyword'>where</span>
<a name="line-1021"></a> <span class='hs-varid'>valid</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bool</span>
<a name="line-1022"></a>
<a name="line-1023"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Valid</span> <span class='hs-layout'>(</span><span class='hs-conid'>Elem</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-1024"></a> <span class='hs-varid'>valid</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-1025"></a>
<a name="line-1026"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Valid</span> <span class='hs-layout'>(</span><span class='hs-conid'>Seq</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-1027"></a> <span class='hs-varid'>valid</span> <span class='hs-layout'>(</span><span class='hs-conid'>Seq</span> <span class='hs-varid'>xs</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>valid</span> <span class='hs-varid'>xs</span>
<a name="line-1028"></a>
<a name="line-1029"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>Sized</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Valid</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Valid</span> <span class='hs-layout'>(</span><span class='hs-conid'>FingerTree</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-1030"></a> <span class='hs-varid'>valid</span> <span class='hs-conid'>Empty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>True</span>
<a name="line-1031"></a> <span class='hs-varid'>valid</span> <span class='hs-layout'>(</span><span class='hs-conid'>Single</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>valid</span> <span class='hs-varid'>x</span>
<a name="line-1032"></a> <span class='hs-varid'>valid</span> <span class='hs-layout'>(</span><span class='hs-conid'>Deep</span> <span class='hs-varid'>s</span> <span class='hs-varid'>pr</span> <span class='hs-varid'>m</span> <span class='hs-varid'>sf</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-1033"></a> <span class='hs-varid'>s</span> <span class='hs-varop'>==</span> <span class='hs-varid'>size</span> <span class='hs-varid'>pr</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>m</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>sf</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>valid</span> <span class='hs-varid'>pr</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>valid</span> <span class='hs-varid'>m</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>valid</span> <span class='hs-varid'>sf</span>
<a name="line-1034"></a>
<a name="line-1035"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>Sized</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-conid'>Valid</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Valid</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-1036"></a> <span class='hs-varid'>valid</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node2</span> <span class='hs-varid'>s</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>s</span> <span class='hs-varop'>==</span> <span class='hs-varid'>size</span> <span class='hs-varid'>a</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>b</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>valid</span> <span class='hs-varid'>a</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>valid</span> <span class='hs-varid'>b</span>
<a name="line-1037"></a> <span class='hs-varid'>valid</span> <span class='hs-layout'>(</span><span class='hs-conid'>Node3</span> <span class='hs-varid'>s</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span>
<a name="line-1038"></a> <span class='hs-varid'>s</span> <span class='hs-varop'>==</span> <span class='hs-varid'>size</span> <span class='hs-varid'>a</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>b</span> <span class='hs-varop'>+</span> <span class='hs-varid'>size</span> <span class='hs-varid'>c</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>valid</span> <span class='hs-varid'>a</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>valid</span> <span class='hs-varid'>b</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>valid</span> <span class='hs-varid'>c</span>
<a name="line-1039"></a>
<a name="line-1040"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Valid</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Valid</span> <span class='hs-layout'>(</span><span class='hs-conid'>Digit</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-1041"></a> <span class='hs-varid'>valid</span> <span class='hs-layout'>(</span><span class='hs-conid'>One</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>valid</span> <span class='hs-varid'>a</span>
<a name="line-1042"></a> <span class='hs-varid'>valid</span> <span class='hs-layout'>(</span><span class='hs-conid'>Two</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>valid</span> <span class='hs-varid'>a</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>valid</span> <span class='hs-varid'>b</span>
<a name="line-1043"></a> <span class='hs-varid'>valid</span> <span class='hs-layout'>(</span><span class='hs-conid'>Three</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>valid</span> <span class='hs-varid'>a</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>valid</span> <span class='hs-varid'>b</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>valid</span> <span class='hs-varid'>c</span>
<a name="line-1044"></a> <span class='hs-varid'>valid</span> <span class='hs-layout'>(</span><span class='hs-conid'>Four</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>valid</span> <span class='hs-varid'>a</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>valid</span> <span class='hs-varid'>b</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>valid</span> <span class='hs-varid'>c</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>valid</span> <span class='hs-varid'>d</span>
<a name="line-1045"></a>
<a name="line-1046"></a><span class='hs-cpp'>#endif</span>
</pre></body>
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