Resume suspensions also when reading from classfiles

Make treatment in Scala2Unpickler and Namer the same and factor
out common functionality.

1 files changed, 10 insertions, 2 deletions

diff --git a/src/dotty/tools/dotc/core/Types.scala b/src/dotty/tools/dotc/core/Types.scala
index 8019750bf..373428108 100644
--- a/src/dotty/tools/dotc/core/Types.scala
+++ b/src/dotty/tools/dotc/core/Types.scala
@@ -3049,12 +3049,20 @@ object Types {
   /** A class for temporary class infos where `parents` are not yet known. */
   final class TempClassInfo(prefix: Type, cls: ClassSymbol, decls: Scope, selfInfo: DotClass)
   extends CachedClassInfo(prefix, cls, Nil, decls, selfInfo) {
-  
+
     /** A list of actions that were because they rely on the class info of `cls` to
      *  be no longer temporary. These actions will be performed once `cls` gets a real
      *  ClassInfo.
      */
-    var suspensions: List[() => Unit] = Nil
+    private var suspensions: List[() => Unit] = Nil
+
+    def addSuspension(suspension: () => Unit): Unit = suspensions ::= suspension
+
+    /** Install classinfo with known parents in `denot` and resume all suspensions */
+    def finalize(denot: SymDenotation, parents: List[TypeRef])(implicit ctx: Context) = {
+      denot.info = derivedClassInfo(classParents = parents)
+      suspensions.foreach(_())
+    }
   }
 
   object ClassInfo {