Class "ClassNameOrExpression" to represent type information as
类“ClassNameOrExpression”代表类型信息
译者:生物统计家园网 机器人LoveR
描述----------Description----------
This class is used to represent a type test that is specified either as a collection of class names (and whether to check for strict equality or inheritance) or a dynamic predicate expression that is evaluated at run-time to determine whether the test is satisfied.
这个类是用来代表一个类型的测试,被指定为类名集合(是否检查严格的平等或继承)或动态谓词表达式,在运行时评估,以确定是否满足测试。
We may not need this in the "new" class hierarchy. It was created originally to be a union of character vectors, calls or expressions. But now that we have NamedTypeTest and DynamicTypeTest, we could perhaps use a common base class.
我们可能并不需要在“新”的类层次结构。它原本是一个特征向量的联盟,call或expression的。但现在,我们有NamedTypeTest和DynamicTypeTest,我们也许可以用一个共同的基类。
类的对象----------Objects from the Class----------
A virtual Class: No objects may be created from it.
可以从它创建一个虚拟类:无对象。
方法----------Methods----------
No methods defined with class "ClassNameOrExpression" in the signature.
没有任何方法定义类的“ClassNameOrExpression”签名。
作者(S)----------Author(s)----------
Duncan Temple Lang <duncan@wald.ucdavis.edu>