Scala reflection to access all public fields at runtime

Question

Given the following class hierarchy:

class A {
  val x = 3
  val y = 4
}

class B extends A {
  val z = 5
}

And say I have an instance of B

Answer 1

In brief:

import scala.reflect.runtime.universe._

val a = new A
val rm = scala.reflect.runtime.currentMirror
val accessors = rm.classSymbol(a.getClass).toType.members.collect {
  case m: MethodSymbol if m.isGetter && m.isPublic => m 
}
val instanceMirror = rm.reflect(a)
for(acc <- accessors)
  println(s"$a: ${instanceMirror.reflectMethod(acc).apply()}")