展开宏定义与包括宏 [英] Expand define macro with include macro

问题描述

我试图定义一个宏。我们的想法是，当它膨胀时，它会包括一个标头。例如：

I'm trying to define a macro. The idea is that when it expands, it'll include a header. For example:

#define function() \
                   include <CustomHeader.h>

非常感谢。

推荐答案

这不能做。

由此产生完全宏取代preprocessing即使它类似于令牌序列不为preprocessing指令处理之一，[...]

The resulting completely macro-replaced preprocessing token sequence is not processed as a preprocessing directive even if it resembles one, [...]

这特别的报价是从一个比较新的C ++标准的草案，但在措辞细微的变化，同样的基本思路已经出现将近永远。

That particular quote is from a reasonably recent draft of the C++ standard, but with minor changes in wording, the same basic idea has been around nearly forever.

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