使用 static_assert 检查传递给宏的类型 [英] Use static_assert to check types passed to macro

问题描述

不幸的是，我的库的原始版本中遗留了几个宏，它们使用了一些非常疯狂的 C.特别是，我有一系列宏希望将某些类型传递给它们.是否可以按照以下方式进行操作:

I unfortunately have several macros left over from the original version of my library that employed some pretty crazy C. In particular, I have a series of macros that expect certain types to be passed to them. Is it possible to do something along the lines of:

static_assert(decltype(retval) == bool);

怎么办?有什么聪明的选择吗?

是的，我知道宏很糟糕.我知道 C++ 不是 C，等等.

Yes I'm aware macros are bad. I'm aware C++ is not C, etc.

这是一些相关代码，以及源文件.欢迎提出建议.原始问题保持不变.

Here is some related code, and the source file. Suggestions are welcome. The original question remains the same.

推荐答案

我发现这是最干净的，使用@UncleBens 建议:

I found this to be the cleanest, using @UncleBens suggestion:

#include <type_traits>

static_assert(std::is_same<decltype(retval), bool>::value, "retval must be bool");

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