No way to annotate a package

[scabug]

Scala does not have any way of placing annotations on a package.

In Java, package annotations are placed before the package statement in a Java source file named package-info.java. The compiler generates an interface named package-info and attaches those annotations to it. These annotations (if they have a retention policy of RUNTIME) can then be looked at with some methods on java.lang.Package.

See also: [http://java.sun.com/docs/books/jls/third_edition/html/packages.htmlSI-7.4.1.1 JLS 3rd Ed. � 7.4.1.1]

The most obvious syntax for this is to allow annotations on package objects. This might result in confusion, though, since package objects have their own, distinct class files.

[scabug]

Imported From: https://issues.scala-lang.org/browse/SI-3600?orig=1 Reporter: Alex Hvostov (argv)

[scabug]

Gabriel Rossetti (grossetti) said: Yes, this would be nice

[scabug]

@paulp said: A meta-annotation should be used to disambiguate between package and package object.

[scabug]

Nathan Stoddard (nstoddard) said: This would be very nice to have for the @strictfp annotation, especially for package objects.

[scabug]

@gzm0 said: After discussion with Lukas Rytz, we are of the opinion that allowing annotations on package objects and requiring a java source file if (Java-)annotations on packages are required is sufficient.

[scabug]

@xeno-by said: I would like to mention that loading Java-based package annotations via Scala reflection isn't implemented yet.

[scabug]

@gzm0 said: Thanks for the info. This won't affect what we propose.

[som-snytt]

No one mentioned that this duplicates https://github.com/scala/bug/issues/3115 with possibly upping the ante on java interop.