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Java parser: java 'static final' field cannot be used as constant expression (i.e. in java annotation argument) #5791

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scabug opened this issue May 12, 2012 · 3 comments
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Java parser: java 'static final' field cannot be used as constant expression (i.e. in java annotation argument) #5791

scabug opened this issue May 12, 2012 · 3 comments
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annotations duplicate java interop minimized

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@scabug
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scabug commented May 12, 2012

Given two java classes:

public @interface Ann {
  int value();
}
public class Cls {
  public static final int KONST = 10;
}

and a Scala class

class T {
  @Ann(Cls.KONST)
  def foo { }
}

Compiling the three files together with scalac yields an error message:

lucmac:const luc$ ~/Downloads/latest/bin/scalac Ann.java Cls.java T.scala 
T.scala:2: error: annotation argument needs to be a constant; found: Cls.KONST
  @Ann(Cls.KONST)
           ^
one error found

Compiling first the java files and and putting their classfiles on the classpath allows compiling T.scala:

lucmac:const luc$ javac Ann.java Cls.java 
lucmac:const luc$ ~/Downloads/latest/bin/scalac -cp . T.scala 
lucmac:const luc$
@scabug
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scabug commented May 12, 2012

Imported From: https://issues.scala-lang.org/browse/SI-5791?orig=1
Reporter: @lrytz
See #5699, #2764
Duplicates #5333

@scabug
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scabug commented May 12, 2012

@lrytz said:
2764 shows a similar problem with java enums

@scabug
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scabug commented May 12, 2012

@soc said (edited on May 12, 2012 6:50:44 PM UTC):
Closely related to #5333 and #5699.

@scabug scabug closed this as completed May 12, 2012
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