使用 static_assert 检查传递给宏的类型
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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