I'm trying to create a scalameta annotation, that will define a new case class inside of an existing object.
my goal is to transform:
object MyObj {
case class A()
}
into:
object MyObj {
case class A()
case class B(b: Int, bb: Int)
}
for that I created the following annotation:
import scala.annotation.StaticAnnotation
import scala.meta._
class schema extends StaticAnnotation {
inline def apply(defn: Any): Any = meta {
val q"..$mods object $ename extends $template" = defn
val generatedClass: Defn.Class =
q"""
case class B(b: Int, bb: Int)
"""
//the stats that were defined in the annotated object
val existingStats: scala.collection.immutable.Seq[Stat] = template.stats.get
//new stats
val stats = Some(existingStats :+ generatedClass)
//the new template
val newT = template.copy(stats=stats)
val res =
q"""
..$mods object $ename extends $newT
"""
println("============== result ==============")
println("res: " +res)
println("====================================")
res
}
}
and this main class to test it:
object Main {
def main(args: Array[String]): Unit = {
println("Hello")
val b = new MyObj.B(2,22)
val q = MyObj.A()
println(b)
}
}
@schema
object MyObj {
case class A()
}
When I compile and and run the main class, the code behaves as expected.
during compile it prints:
============== result ==============
res: object MyObj {
case class A()
case class B(b: Int, bb: Int)
}
====================================
and after running the code:
Hello
B(2,22)
My problem is when I try to work with this code with intellij.
The code compiles and run from intellij, but the new class B can't be recognized, and therefore non of the code completion and hints don't work
I'm using the latest intellij and scala plugin
I've uploaded the full project to git: https://github.com/lev112/scalameta_intellij/tree/master
This is the first time I'm trying to use scalameta, and I'm trying to understand if it's a bug in intellij, or am I doing something wrong
