带有C ++宏的可选参数 [英] Optional Parameters with C++ Macros

问题描述

有什么方法获得可选参数与C ++宏？

Is there some way of getting optional parameters with C++ Macros? Some sort of overloading would be nice too.

推荐答案

C ++宏没有从C改变。因为C没有重载和函数的默认参数，它肯定没有他们的宏。所以回答你的问题：不，这些功能不存在宏。您唯一的选择是使用不同的名称定义多个宏（或根本不使用宏）。

C++ macros haven't changed from C. Since C didn't have overloading and default arguments for functions, it certainly didn't have them for macros. So to answer your question: no, those features don't exist for macros. Your only option is to define multiple macros with different names (or not use macros at all).

作为侧注：在C ++中，宏尽可能多。如果您需要这样的功能，就有可能过度使用宏。

As a sidenote: In C++ it's generally considered good practice to move away from macros as much as possible. If you need features like this, there's a good chance you're overusing macros.

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