在 Scala 中，有没有办法访问在外部作用域中定义的符号(变量)?
问题描述：
例如:
def factory(_name: String) = new Person {
val name: String = _name
}
我希望避免在外部范围内修改 _name 的名称.
I'm looking to avoid mangling the name of _name in the outer scope.
答
虽然远非理想的方法，但这行之有效":
While far from an ideal approach, this "does the trick":
abstract class Person { val name: String }
def factory(name: String) = {
val _name = name
new Person {
val name: String = _name
}
}
factory("Fred").name // Fred
我不知道还有什么其他方法可以接近.Scala 语言规范(第 2 章)讨论了遮蔽——它没有任何地方讨论限定那些隐式"作用域的方法.
I don't know of any other way to get close. There is a section in the Scala Language Specification (Chapter 2) which talks about shadowing -- and in no place does it discuss a way to qualify those "implicit" scopes.
快乐编码.