Elixir递归和接收

示例

递归可用于接收多条消息

defmodule Processes do
    def receiver do
        receive do
            {:ok, val} ->
               IO.puts"Received Value: #{val}"
            _ ->
               IO.puts"Received something else"
        end
        receiver
    end
end

iex(1)> pid = spawn Processes, :receiver, []
#PID<0.95.0>
iex(2)> send pid, {:ok, 10}
Received Value: 10
{:ok, 10}
iex(3)> send pid, {:ok, 42}
{:ok, 42}
Received Value: 42
iex(4)> send pid, :random
:random
Received something else

Elixir将使用尾部调用递归优化，只要函数调用是函数中最后发生的事情（如示例中所示）。