本文介绍了c++ 将枚举值标记为已弃用?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!
问题描述
是否可以将枚举值标记为已弃用?
Is it possible to mark an enum value as deprecated?
例如
enum MyEnum {
firstvalue = 0
secondvalue,
thirdvalue, // deprecated
fourthvalue
};
二等奖的解决方案是 ifdef MSVC 和 GCC 解决方案.
A second prize solution would be to ifdef a MSVC and a GCC solution.
推荐答案
你可以这样做:
enum MyEnum {
firstvalue = 0,
secondvalue,
thirdvalue, // deprecated
fourthvalue
};
#pragma deprecated(thirdvalue)
然后每当使用该变量时,编译器将输出以下内容:
then when ever the variable is used, the compiler will output the following:
warning C4995: 'thirdvalue': name was marked as #pragma deprecated
编辑
这看起来有点 hacky,我没有 GCC 编译器来确认(有人可以为我做这件事吗?)但它应该可以工作:
EDIT
This looks a bit hacky and i dont have a GCC compiler to confirm (could someone do that for me?) but it should work:
enum MyEnum {
firstvalue = 0,
secondvalue,
#ifdef _MSC_VER
thirdvalue,
#endif
fourthvalue = secondvalue + 2
};
#ifdef __GNUC__
__attribute__ ((deprecated)) const MyEnum thirdvalue = MyEnum(secondvalue + 1);
#elif defined _MSC_VER
#pragma deprecated(thirdvalue)
#endif
这是我的回答和 MSalters 的回答的结合
it's a combination of my answer and MSalters' answer
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