lhs2tex-1.12: doc/Indent2a.lhs
%include poly.fmt
\begin{code}
scanr1 :: (a -> a -> a) -> [a] -> [a]
scanr1 f xxs = case xxs of
x:xs -> case xs of
[] -> [x]
_ -> let
qs = scanr1 f xs
in
case qs of
q:_ -> f x q : qs
\end{code}