fused_enum

in lib/anthropic/internal/util.rb [627:649]

• 20 lines of code
• 3 McCabe index (conditional complexity)

        def fused_enum(enum, external: false, &close)
          fused = false
          iter = Enumerator.new do |y|
            next if fused

            fused = true
            if external
              loop { y << enum.next }
            else
              enum.each(&y)
            end
          ensure
            close&.call
            close = nil
          end

          iter.define_singleton_method(:rewind) do
            fused = true
            self
          end
          iter
        end