During name lookup, if a name used in class scope does not resolve to a class member name, the scopes surrounding the class or member definition are searched to find a declaration for the name.

• 在名字查找期间，如果类作用域中使用的名字不能确定为类成员名，则在包含该类或成员定义的作用域中查找，以便找到该名字的声明。