这是怎样的常量表达式进行评估？

How is this constant expression evaluated?

youdao

所以我们要使用整型常量表达式。

So we have to use an integral constant expression.

youdao

例如，枚举成员的初始化式必须是常量表达式。

For example, the initializer of an enumerator must be a constant expression.

youdao

常量表达式是可在编译时可完全计算的表达式。

A constant-expression is an expression that can be fully evaluated at compile-time.

youdao

常量表达式是可在编译时可完全计算的表达式。

A constant-expression is an expression that can be fully evaluated at compile-time.

youdao