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Allow using classOf with object type #9279
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10 changes: 10 additions & 0 deletions
10
test/files/pos/classOfObjectType/AnnotationWithClassType.java
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Original file line number | Diff line number | Diff line change |
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import java.lang.annotation.ElementType; | ||
import java.lang.annotation.Retention; | ||
import java.lang.annotation.RetentionPolicy; | ||
import java.lang.annotation.Target; | ||
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@Target(ElementType.METHOD) | ||
@Retention(RetentionPolicy.RUNTIME) | ||
public @interface AnnotationWithClassType { | ||
Class<?> cls(); | ||
} |
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Original file line number | Diff line number | Diff line change |
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object Bar | ||
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trait Foo { | ||
@AnnotationWithClassType(cls = classOf[Bar.type]) | ||
def function: Any = ??? | ||
} | ||
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There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. I added this compile test because the issue shows up when using a Java annotation that requires a class. But of course, the impl allows many other usages. When I faced that issue for the first time, I tried to used it as follows: trait Foo {
@AnnotationWithClassType(cls = Bar.getClass)
def function: Any = ???
} which gives the following error: Foo.scala:5: error: annotation argument needs to be a constant; found: Bar.getClass()
@AnnotationWithClassType(cls = Bar.getClass) |
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Original file line number | Diff line number | Diff line change |
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object Test { | ||
object Bar | ||
def main(args: Array[String]): Unit = { | ||
assert(Bar.getClass == classOf[Bar.type] ) | ||
} | ||
} |
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At the end, this seems to be suspiciously simple fix. Not sure if that has other implications though.