Embedded statements are not allowed in constant expressions, such as the value of an enumeration constant, the width of a bit-field, or the initial value of a static variable.

在常量表达式，比如枚举型常量、位域的宽度或是静态变量的初始值，是不允许使用在这种声明中的。

youdao

From navigation, to mapping URLs, writing template expressions, everything is supported with an extra layer of error-checking and static analysis.

从导航到URL映射及模板语言的编写，所有内容都由一个额外的错误检测及静态分析层所支撑。

youdao

The begin and end attributes should be either static integer values or expressions evaluating to integer values.

begin和end属性要么是静态整数值，要么是可以得出整数值的表达式。

youdao

What's the point? Again, you can have things that are syntactically legal but not semantically meaningful, and static semantics is going to be a way of helping us decide what expressions, what pieces of code, actually have real meaning to it. All right?

重点是什么？重申，你可以有东西在语义结构的逻辑上有意义,但是在语义上无意义，而static语义,将是一个帮助我们,决定哪些表达，哪部分的代码实际上，有意义的途径，好么？

麻省理工公开课 - 计算机科学及编程导论课程节选