timeout-iterator vs peeknth vs peekmore

TimeoutIterator is a wrapper over any iterator that adds peek_timeout and next_timeout functions. The canonical use-case is parsing multi-line free-form records (such as tailing a log fime) where it is desirable to consume the very last line, and peek whether the record continues on the next time, but not block indefinitely on the peek.

Iterator adapters for peeking multiple elements ahead or behind, with optional fixed-size buffers.

Iterator adapter like Peekable, but for peeking forward multiple elements