有一个:
enum SomeEnum
{
A = 0,
B = 1,
C = 2
}
现在编译器允许我写:
SomeEnum x = SomeEnum.A;
switch(x)
{
case 0: // <--- Considered SomeEnum.A
break;
case SomeEnum.B:
break;
case SomeEnum.C:
break;
default:
break;
}
0
被认为是SomeItems.A
。但我不能写:
SomeEnum x = SomeEnum.A;
switch(x)
{
case 0:
break;
case 1: // <--- Here is a compilation error.
break;
case SomeEnum.C:
break;
default:
break;
}
为什么只存在隐式转换0
?