Idea scala Plugin to support macro

Permanently deleted user

Created October 02, 2016 20:08

Hi Community!

Help me please. I have some problem.

for example:

trait Make[A, B]

@identity
case class A(f1: B, f2: Int)

case class B(b1:String)

It should be like this:

object A {

  object f1 extends Make[A, B] {
    object b1 extends Make[B, String]
  }

  object f2 extends Make[A, Int]

}

I don't know how it make (. How get fields from ScClassParameterImpl? It is possible?

private def generateInnerObject(obj: ScObject): Seq[String] = {

  val clazz = obj.fakeCompanionClassOrCompanionClass.asInstanceOf[ScClass]
  val fields = clazz.allVals.collect({ case (f: ScClassParameterImpl, _) => f }).filter(_.isCaseClassVal)

  fields.map({ i =>
    val innerFields =   ...
    if (clazz.typeParameters.isEmpty)
      s"""object ${i.name} extends org.jetbrains.example.injector.Make[${clazz.qualifiedName}, ${i.getType(TypingContext.empty).map(_.canonicalText).getOrElse("Any")}]
        ${innerFields.mkString(";")}
       """
    else
      s"""object ${i.name} extends org.jetbrains.example.injector.Make[${clazz.qualifiedName}, ${i.typeElement.get.calcType}]
          ${innerFields.mkString(";")}
       """
  })

}

Thank you. I'm sorry for my english :)

1 comment

Alexander Podkhalyuzin

Created October 04, 2016 11:14

Official comment

To extract parameters from class use clazz.parameters instead of allVals. Look at this example:

val clazz: ScClass = ???
implicit val typeSystem = clazz.typeSystem
val parameters = clazz.parameters
val parameter = parameters.head
val innerParameters = parameter.getType(TypingContext.empty).getOrAny.extractClass(clazz.getProject) match {
  case Some(clazz: ScClass) => clazz.parameters // inner parameters
  case _ => Seq.empty
}

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