Elide this for types in parent list

Author: liufengyun

library/src/scala/tasty/reflect/Printers.scala

@@ -609,7 +609,7 @@ trait Printers
 
           def printParent(parent: TermOrTypeTree, needEmptyParens: Boolean = false): Unit = parent match {
             case IsTypeTree(parent) =>
-              printTypeTree(parent)
+              printTypeTree(parent, Some(cdef.symbol))
             case IsTerm(Term.TypeApply(fun, targs)) =>
               printParent(fun)
             case IsTerm(Term.Apply(fun@Term.Apply(_,_), args)) =>
@@ -621,7 +621,7 @@ trait Printers
               if (!args.isEmpty || needEmptyParens)
                 inParens(printTrees(args, ", "))
             case IsTerm(Term.Select(Term.New(tpt), _)) =>
-              printTypeTree(tpt)
+              printTypeTree(tpt, Some(cdef.symbol))
             case IsTerm(parent) =>
               throw new MatchError(parent.show)
           }
@@ -1359,6 +1359,8 @@ trait Printers
        *                NoSymbol means the current type is not a self type annotation.
        *                Self type annotation should elide current class prefix to avoid
        *                cyclic type checking error.
+       *
+       *                It is also used in parent list to avoid `this` prefix.
        */
       def printTypeTree(tree: TypeTree, selfIn: Option[Symbol] = None): Buffer = tree match {
         case TypeTree.Inferred() =>
@@ -1470,6 +1472,8 @@ trait Printers
        *  @param selfIn The current type is a self type in the indicated class.
        *                Self type annotation should elide current class prefix to avoid
        *                cyclic type checking error.
+       *
+       *                It is also used in parent list to avoid `this` prefix.
        */
       def printType(tpe: Type, selfIn: Option[Symbol] = None): Buffer = tpe match {
         case Type.ConstantType(const) =>