class FactoryBot::Sequence

def increment_value
  @value.next
end

def initialize(name, *args, &proc)
  @name = name
  @proc = proc
  options = args.extract_options!
  @value = args.first || 1
  @aliases = options.fetch(:aliases) { [] }
  unless @value.respond_to?(:peek)
    @value = EnumeratorAdapter.new(@value)
  end
end

def names
  [@name] + @aliases
end

def next(scope = nil)
  if @proc && scope
    scope.instance_exec(value, &@proc)
  elsif @proc
    @proc.call(value)
  else
    value
  end
ensure
  increment_value
end

def rewind
  @value.rewind
end

def value
  @value.peek
end