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Remove unneeded list concat on reduce #18

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Merged
fhunleth merged 1 commit into from
May 10, 2026
+7 −1
Merged

Remove unneeded list concat on reduce #18

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8 changes: 7 additions & 1 deletion lib/circular_buffer.ex
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Original file line number Diff line number Diff line change
Expand Up @@ -127,9 +127,15 @@ defmodule CircularBuffer do
end

def reduce(cb, acc, fun) do
Enumerable.List.reduce(CB.to_list(cb), acc, fun)
do_reduce(cb.b, Enum.reverse(cb.a), acc, fun)
end

defp do_reduce(_b, _a, {:halt, acc}, _fun), do: {:halted, acc}
defp do_reduce(b, a, {:suspend, acc}, fun), do: {:suspended, acc, &do_reduce(b, a, &1, fun)}
defp do_reduce([], [], {:cont, acc}, _fun), do: {:done, acc}
defp do_reduce([], [h | t], {:cont, acc}, fun), do: do_reduce([], t, fun.(h, acc), fun)
defp do_reduce([h | t], a, {:cont, acc}, fun), do: do_reduce(t, a, fun.(h, acc), fun)

def slice(_cb) do
{:error, __MODULE__}
end
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