:: Ord a => [a] -> [a] -package:ghc -package:imports -package:containers -package:vector-algorithms -package:errors -package:safe -package:generic-deriving -package:hedgehog -package:basement -package:witherable -package:integration package:parsers
Take a parser that may consume input, and on failure, go back to where
we started and fail as if we didn't consume input.