:: Ord a => [a] -> [a] -package:html-entities -is:exact -package:amazonka-core -package:errors -package:extra -is:exact -package:safe -package:Cabal -package:statistics -package:lifted-base -package:containers package:parsers is:exact
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.