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chore: do not assume scala types as transparent, source should enforce it #23105

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Sep 15, 2025
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chore: do not assume scala types as transparent, source should enforce it #23105

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38 changes: 4 additions & 34 deletions compiler/src/dotty/tools/dotc/core/Definitions.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -279,12 +279,12 @@ class Definitions {
* To achieve this, we synthesize all Any and Object methods; Object methods no longer get
* loaded from a classfile.
*/
@tu lazy val AnyClass: ClassSymbol = completeClass(enterCompleteClassSymbol(ScalaPackageClass, tpnme.Any, Abstract, Nil), ensureCtor = false)
@tu lazy val AnyClass: ClassSymbol = completeClass(enterCompleteClassSymbol(ScalaPackageClass, tpnme.Any, Abstract | TransparentType, Nil), ensureCtor = false)
def AnyType: TypeRef = AnyClass.typeRef
@tu lazy val MatchableClass: ClassSymbol = completeClass(enterCompleteClassSymbol(ScalaPackageClass, tpnme.Matchable, Trait, AnyType :: Nil), ensureCtor = false)
@tu lazy val MatchableClass: ClassSymbol = completeClass(enterCompleteClassSymbol(ScalaPackageClass, tpnme.Matchable, Trait | TransparentType, AnyType :: Nil), ensureCtor = false)
def MatchableType: TypeRef = MatchableClass.typeRef
@tu lazy val AnyValClass: ClassSymbol =
val res = completeClass(enterCompleteClassSymbol(ScalaPackageClass, tpnme.AnyVal, Abstract, List(AnyType, MatchableType)))
val res = completeClass(enterCompleteClassSymbol(ScalaPackageClass, tpnme.AnyVal, Abstract | TransparentType, List(AnyType, MatchableType)))
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Do we still need a separate definition for AnyValClass?

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Yes, Dotty is unable to compile AnyVal for now. It's in my todo list to attempt to make it compile AnyVal (if possible)

// Mark companion as absent, so that class does not get re-completed
val companion = ScalaPackageVal.info.decl(nme.AnyVal).symbol
companion.moduleClass.markAbsent()
Expand Down Expand Up @@ -2062,42 +2062,12 @@ class Definitions {
HasProblematicGetClass.contains(className)

@tu lazy val assumedTransparentNames: Map[Name, Set[Symbol]] =
// add these for now, until we had a chance to retrofit 2.13 stdlib
// we should do a more through sweep through it then.
val strs = Map(
"Any" -> Set("scala"),
"AnyVal" -> Set("scala"),
"Matchable" -> Set("scala"),
"Product" -> Set("scala"),
"Object" -> Set("java.lang"),
"Comparable" -> Set("java.lang"),
"Serializable" -> Set("java.io"),
"BitSetOps" -> Set("scala.collection"),
"IndexedSeqOps" -> Set("scala.collection", "scala.collection.mutable", "scala.collection.immutable"),
"IterableOnceOps" -> Set("scala.collection"),
"IterableOps" -> Set("scala.collection"),
"LinearSeqOps" -> Set("scala.collection", "scala.collection.immutable"),
"MapOps" -> Set("scala.collection", "scala.collection.mutable", "scala.collection.immutable"),
"SeqOps" -> Set("scala.collection", "scala.collection.mutable", "scala.collection.immutable"),
"SetOps" -> Set("scala.collection", "scala.collection.mutable", "scala.collection.immutable"),
"SortedMapOps" -> Set("scala.collection", "scala.collection.mutable", "scala.collection.immutable"),
"SortedOps" -> Set("scala.collection"),
"SortedSetOps" -> Set("scala.collection", "scala.collection.mutable", "scala.collection.immutable"),
"StrictOptimizedIterableOps" -> Set("scala.collection"),
"StrictOptimizedLinearSeqOps" -> Set("scala.collection"),
"StrictOptimizedMapOps" -> Set("scala.collection", "scala.collection.immutable"),
"StrictOptimizedSeqOps" -> Set("scala.collection", "scala.collection.immutable"),
"StrictOptimizedSetOps" -> Set("scala.collection", "scala.collection.immutable"),
"StrictOptimizedSortedMapOps" -> Set("scala.collection", "scala.collection.immutable"),
"StrictOptimizedSortedSetOps" -> Set("scala.collection", "scala.collection.immutable"),
"ArrayDequeOps" -> Set("scala.collection.mutable"),
"DefaultSerializable" -> Set("scala.collection.generic"),
"IsIterable" -> Set("scala.collection.generic"),
"IsIterableLowPriority" -> Set("scala.collection.generic"),
"IsIterableOnce" -> Set("scala.collection.generic"),
"IsIterableOnceLowPriority" -> Set("scala.collection.generic"),
"IsMap" -> Set("scala.collection.generic"),
"IsSeq" -> Set("scala.collection.generic"))
)
strs.map { case (simple, pkgs) => (
simple.toTypeName,
pkgs.map(pkg => staticRef(pkg.toTermName, isPackage = true).symbol.moduleClass)
Expand Down
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