Add value class run tests

src/dotty/tools/dotc/transform/ExtensionMethods.scala

@@ -88,11 +88,11 @@ class ExtensionMethods extends MiniPhaseTransform with DenotTransformer with Ful
             decls1.enter(evt2uSym)
           }
 
-          // add a VCXXXCompanion superclass
-
+          // Add the extension methods, the cast methods u2evt$ and evt2u$, and a VC*Companion superclass
           moduleClassSym.copySymDenotation(info =
             cinfo.derivedClassInfo(
-              classParents = ctx.normalizeToClassRefs(List(newSuperClass), moduleSym, decls1),
+              // FIXME: use of VC*Companion superclasses is disabled until the conflicts with SyntheticMethods are solved.
+              //classParents = ctx.normalizeToClassRefs(List(newSuperClass), moduleSym, decls1),
               decls = decls1))
         case _ =>
           moduleClassSym

tests/run/t6260-delambdafy.check

@@ -0,0 +1,4 @@
+f(C@2e)
+
+apply
+get$Lambda

tests/pending/run/value-class-extractor-2.scala → tests/run/value-class-extractor-2.scala

@@ -1,6 +1,7 @@
 final class Opt[+A >: Null](val value: A) extends AnyVal {
   def get: A  = value
   def isEmpty = value == null
+  def isDefined = !isEmpty
 }
 object Opt {
   final val None = new Opt[Null](null)

tests/pending/run/value-class-extractor.scala → tests/run/value-class-extractor.scala

@@ -6,12 +6,13 @@ object NonNullChar {
   @inline final val None = new NonNullChar(0.toChar)
 }
 
-final class SomeProduct extends Product3[String, Int, List[String]] {
+final class SomeProduct /*extends Product3[String, Int, List[String]]*/ {
   def canEqual(x: Any) = x.isInstanceOf[SomeProduct]
   def _1 = "abc"
   def _2 = 5
   def _3 = List("bippy")
   def isEmpty = false
+  def isDefined = !isEmpty
   def get = this
 }
 object SomeProduct {