c中的模拟器/生成的switch语句范围 [英] Simulater/Generated switch statement range in c

问题描述

在 c(99?) 或目标 C switch 语句中是否有支持范围大小写的技巧?我知道不支持这样写:

Is there a hack to support range case in a c(99?) or objective C switch statement ? I know this is not supported to write something like this:

switch(x)
   case 1:
   case 2..10:
   case 11:

但我在想应该有一种方法可以使用#define 宏生成代码.当然我可以用案例列表定义一个宏，但我希望有一种更优雅的方式，比如CASERANGE(x,x+10) 会生成:

But I was thinking there should be a way to generate code with a #define macro. Of course I can define a macro with the list of cases but I was hoping for a more elegant way like CASERANGE(x,x+10) which would generate:

case x
case x+1
case x+2

有可能吗?

推荐答案

GCC 有一个 对 C 语言的扩展 允许与您的第一个示例类似的内容，但除此之外，如果有可移植/ANSI 的方式来实现它，那么现在就已经完成了.我不相信有一个.

GCC has an extension to the C language that allows something similar to your first example, but other than that, if there was a portable/ANSI way of doing it, it would have been done by now. I don't believe there is one.

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