diff options
Diffstat (limited to 'src/dotty/tools/dotc/core/Types.scala')
-rw-r--r-- | src/dotty/tools/dotc/core/Types.scala | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/src/dotty/tools/dotc/core/Types.scala b/src/dotty/tools/dotc/core/Types.scala index a6ba7d9a0..787c7c4e9 100644 --- a/src/dotty/tools/dotc/core/Types.scala +++ b/src/dotty/tools/dotc/core/Types.scala @@ -1535,16 +1535,31 @@ object Types { // --- Other SingletonTypes: ThisType/SuperType/ConstantType --------------------------- /** The type cls.this */ - abstract case class ThisType(cls: ClassSymbol) extends CachedProxyType with SingletonType { - override def underlying(implicit ctx: Context) = cls.classInfo.selfType - override def computeHash = doHash(cls) + abstract case class ThisType(private var myCls: ClassSymbol) extends CachedProxyType with SingletonType { + def cls(implicit ctx: Context): ClassSymbol = + try myCls.denot.symbol.asClass + catch { + case ex: StaleSymbol => + def prevDenot(implicit ctx: Context) = myCls.denot + val prev = prevDenot(ctx.fresh.setPeriod(Period(myCls.defRunId, ctx.phaseId))) + myCls = prev.owner.info.member(prev.name).symbol.asClass + cls + } + override def underlying(implicit ctx: Context) = + try cls.classInfo.selfType + catch { + case ex: StaleSymbol => + println(i"stale symbol when deref ${cls.id}") + throw ex + } + override def computeHash = doHash(myCls) } final class CachedThisType(cls: ClassSymbol) extends ThisType(cls) // TODO: consider hash before constructing types? object ThisType { - def apply(cls: ClassSymbol)(implicit ctx: Context) = + def raw(cls: ClassSymbol)(implicit ctx: Context) = unique(new CachedThisType(cls)) } |