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Experiment: Use immutable.Set for TypeVars #6338

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Experiment: Use immutable.Set for TypeVars #6338

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2 changes: 1 addition & 1 deletion compiler/src/dotty/tools/dotc/core/TyperState.scala
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Expand Up @@ -80,7 +80,7 @@ class TyperState(private val previous: TyperState /* | Null */) {
def uninstVars: Seq[TypeVar] = constraint.uninstVars

/** The set of uninstantiated type variables which have this state as their owning state */
private[this] var myOwnedVars: TypeVars = SimpleIdentitySet.empty
private[this] var myOwnedVars: TypeVars = collection.immutable.Set.empty
def ownedVars: TypeVars = myOwnedVars
def ownedVars_=(vs: TypeVars): Unit = myOwnedVars = vs

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2 changes: 1 addition & 1 deletion compiler/src/dotty/tools/dotc/core/Types.scala
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Expand Up @@ -3757,7 +3757,7 @@ object Types {
}
}

type TypeVars = SimpleIdentitySet[TypeVar]
type TypeVars = collection.immutable.Set[TypeVar]

// ------ MatchType ---------------------------------------------------------------

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