Elixir重命名并包装Erlang模块? [英] Elixir rename and wrap Erlang module?

问题描述

是否可以重命名现有的Erlang模块?我在几个Erlang模块中有一些要在Elixir项目(断言库)中使用的代码.

Is it possible to rename an existing Erlang module? I have some code in several Erlang modules that I want to use in an Elixir project (assertion library).

我不想在完成所有Erlang模块后将其转换为Elixir，但我想重命名它们，并可能向其中添加其他功能.这两个模块只是功能的集合，它们不执行行为或执行任何异常操作.

I don't want to convert all the Erlang modules to Elixir as they are complete, but I want to rename them, and possible add additional functions to them. Both modules are simply collections of functions, they don't implement behaviors or do anything unusual.

我希望能够使用现有的Erlang模块:

I want to be able to take an existing Erlang module:

-module(foo_erl).

-export([some_fun/1]).

some_fun(Arg) ->
  ok.

并编写一个Elixir模块来扩展Erlang:

And write an Elixir module to extend the Erlang one:

defmodule ExFoo do
   somehow_extends_erlang_module :foo_erl

   another_fun(arg) do
     :ok
   end
end

然后可以使用Erlang模块中定义的功能:

And then be able to use the functions defined in the Erlang module:

iex(1)> ExFoo.some_fun(:arg) #=> :ok

在Elixir中这可能吗?如果是这样，我将如何去做?

Is this possible in Elixir? If so, how would I go about doing this?

推荐答案

通常，我们建议避免包装Erlang模块.如果您想以自动方式包装许多模块，velimir的帖子就在现场.

In general, we suggest to avoid wrapping Erlang modules. In case you want to wrap many modules in an automatic fashion, velimir's post is right on the spot.

但是，如果您有一次性的情况，您肯定要包装Erlang模块，那么我建议您简单地使用defdelegate:

If you have one-off case though, where you definitely want to wrap an Erlang module, I would suggest to simply use defdelegate:

defmodule MyLists do
  defdelegate [flatten(list), map(fun, list)], to: :lists
end

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