Recursion of internal functions in Erlang

Question

Playing with Erlang, I have a loop loop function:

process_loop(...A long list of parameters here...) ->
    receive
        ...Message processing logic involving the function parameters...
    end,
    process_loop(...Same long list of parameters...)
end.

It looks pretty ugly, so I tried this refactoring:

process_loop(...A long list of parameters...) ->
    Loop = fun() ->
        receive
            ...Message processing logic...
        end,
        Loop()
    end,
    Loop()
end.

But this turned out to be wrong, since the Loop variable is not connected inside the Loop function. So, I developed a workaround:

process_loop(...A long list of parameters...) ->
    Loop = fun(Next) ->
        receive
            ...Message processing logic...
        end,
        Next(Next)
    end,
    Loop(Loop)
end.

I have two questions:

• Is there any way to implement the idea of ​​fragment # 2, but without such “subsequent (subsequent)” workarounds?

• Do fragments No. 1 and No. 3 differ in terms of performance, or are they equivalent?

Answer 1

• No. Unfortunately, an anonymous function is simple. Anonymous unless you give them a name.

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Answer 2

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Answer 3

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Answer 4

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