如何使用 C++ 将 const 枚举变量分配给普通枚举变量？

Question

I have two enum's like as shown below:我有两个枚举，如下所示：

typedef enum {
    NONE = 0,
    test1,
    test2
} TestType;

enum class type
{
    zero = 0,
    one,
    two,
    three
};

When I am assigning one enum to another like as shown below:当我将一个枚举分配给另一个枚举时，如下所示：

const type f_eType;
TestType l_etestType = f_eType;

I am getting the below error:我收到以下错误：

a value of type "type" cannot be used to initialize an entity of type "TestType" “type”类型的值不能用于初始化“TestType”类型的实体

Could someone please help me how to resolve this error without using static_cast .有人可以帮助我如何在不使用static_cast的情况下解决此错误。

Answer 1

If you don't want to use static_cast then you'll have to define the conversion behaviour on your own:如果您不想使用static_cast那么您必须自己定义转换行为：

TestType convert(type val) {
   switch(val) {
   case type::zero:
       return NONE;
   //...
   }
}

Answer 2

TestType l_etestType = static_cast<TestType>(f_eType)