c ++标记枚举值已被弃用？ [英] c++ mark enum value as deprecated?

问题描述

例如

  enum MyEnum {
 firstvalue = 0 
 secondvalue，
 thirdvalue，// deprecated 
 fourthvalue 
}; 
  

二等奖解决方案将是ifdef的MSVC和GCC解决方案。

解决方案

你可以这样做：

 枚举MyEnum {
 firstvalue = 0，
 secondvalue，
 thirdvalue，// deprecated 
 fourthvalue 
}; 
 #pragma deprecated（thirdvalue）
  

然后，当使用变量时，编译器将输出以下内容：

 警告C4995：'thirdvalue'：名称标记为#pragma已弃用
  

编辑

这看起来有点黑客，我没有GCC编译器来确认（可以有人为我做这个），但它应该工作：

 枚举MyEnum {
 firstvalue = 0，
 secondvalue，
 #ifdef _MSC_VER 
 thirdvalue，
 #endif 
 fourthvalue = secondvalue + 2 
}; 
 
 #ifdef __GNUC__ 
 __attribute__（（已弃用））const MyEnum thirdvalue = MyEnum（secondvalue + 1）; 
 #elif defined _MSC_VER 
 #pragma deprecated（thirdvalue）
 #endif 
  

这是我的答案和MSalters的回答

的组合

Is it possible to mark an enum value as deprecated?

e.g.

enum MyEnum {
    firstvalue = 0
    secondvalue,
    thirdvalue, // deprecated
    fourthvalue
};

A second prize solution would be to ifdef a MSVC and a GCC solution.

解决方案

you could do this:

enum MyEnum {
    firstvalue = 0,
    secondvalue,
    thirdvalue, // deprecated
    fourthvalue
};
#pragma deprecated(thirdvalue)

then when ever the variable is used, the compiler will output the following:

warning C4995: 'thirdvalue': name was marked as #pragma deprecated

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

it's a combination of my answer and MSalters' answer

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