Define `@static def` that is also available on module

[armanbilge]

Compiler version

3.4.0-RC1-bin-20240106-c15cc9c-NIGHTLY

Minimized code

//> using scala 3.4.0-RC1-bin-20240106-c15cc9c-NIGHTLY

import scala.annotation.static
import scala.annotation.targetName

class Foo

object Foo {
  @static def foo: Foo = ???
  @targetName("foo") def fooBincompat: Foo = foo
}

Output

[error] ./test.scala:10:26
[error] Double definition:
[error] def foo: Foo in object Foo at line 9 and
[error] def fooBincompat: Foo in object Foo at line 10
[error] have the same type (): Foo after erasure.
[error]   @targetName("foo") def fooBincompat: Foo = foo
[error]                          ^

Expectation

I'm seeking a way that we can add the @static annotation post-facto without breaking binary-compatibility. So we need some way to retain or restore the old definition on the module.