什么是“应该启用结构类型成员方法的反射访问..."?Scala 中的警告是什么意思? [英] What does "reflective access of structural type member method should be enabled..." warning mean in Scala?

问题描述

切换到 Scala 2.10 后，我收到了大量警告:

After switching to Scala 2.10 I get tons of warnings:

结构类型成员方法的反射访问...应该通过使隐式值 language.reflectiveCalls 可见来启用

reflective access of structural type member method ... should be enabled by making the implicit value language.reflectiveCalls visible

这是什么意思?

推荐答案

警告实际上告诉了在文档中查找解释的位置:

The warning actually tells where to look in the documentation for an explanation:

Test.scala:9: warning: reflective access of structural type member method y should be enabled
by making the implicit value language.reflectiveCalls visible.
This can be achieved by adding the import clause 'import scala.language.reflectiveCalls'
or by setting the compiler option -language:reflectiveCalls.
See the Scala docs for value scala.language.reflectiveCalls for a discussion
why the feature should be explicitly enabled.

参考 Scaladoc 条目(请务必单击 |> 向左的箭头以展开文档条目).

Referenced Scaladoc entry (be sure to click the |> arrow to the left to expand the documentation entry).

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