斯卡拉 - 可implicitNotFound标注在方法级应用? [英] Scala - Can implicitNotFound annotation be applied at the method level?
问题描述
我有需要与他们的隐观边界类型参数的方法。我可以使用@implicitNotFound注解给予更好的编译器错误时,该方法被称为无效的数据类型?
I have a method that takes type parameters with an implicit view bounds on them. Can I use the @implicitNotFound annotation to give nicer compiler errors when the method is called with invalid data types?
该方法的文档是无用的,甚至源$ C $ C没有帮助,和使用的所有例子都是在线的特征或一流水平。
The documentation for the method is useless and even the source code doesn't help, and all the examples of use online are at the trait or class level.
推荐答案
没有,你不能直接这样做。正如您所注意到, @implicitNotFound
诠释特质或类。你可以,但是,做一个特殊的隐式类型特地为该方法和注释,如果你真的想有一个自定义消息。
No, you cannot directly do that. As you’ve noticed, @implicitNotFound
annotates traits or classes. You could, however, make a special implicit type just for that method and annotate it if you really wanted to have a custom message.
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