class Reline::KeyStroke

def match_status(input)
  key_mapping.keys.select { |lhs|
    start_with?(lhs, input)
  }.tap { |it|
    return :matched  if it.size == 1 && equal?(it[0], input)
    return :matching if it.size == 1 && !equal?(it[0], input)
    return :matched  if it.max_by(&:size)&.size&.< input.size
    return :matching if it.size > 1
  }
  key_mapping.keys.select { |lhs|
    start_with?(input, lhs)
  }.tap { |it|
    return it.size > 0 ? :matched : :unmatched
  }
end