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Let the info of opaque types always depend on the prefix #11300

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Merged
merged 1 commit into from
Feb 5, 2021
Merged

Let the info of opaque types always depend on the prefix #11300

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1 change: 1 addition & 0 deletions compiler/src/dotty/tools/dotc/core/Types.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -2299,6 +2299,7 @@ object Types {
*/
private def infoDependsOnPrefix(symd: SymDenotation, prefix: Type)(using Context): Boolean =
symd.maybeOwner.membersNeedAsSeenFrom(prefix) && !symd.is(NonMember)
|| prefix.isInstanceOf[Types.ThisType] && symd.is(Opaque) // see pos/i11277.scala for a test where this matters

/** Is this a reference to a class or object member? */
def isMemberRef(using Context): Boolean = designator match {
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8 changes: 8 additions & 0 deletions tests/pos/i11277.scala
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Original file line number Diff line number Diff line change
@@ -0,0 +1,8 @@
class Foo {
opaque type Num = Int

val z = Test.id(this)(1)
}
object Test {
def id(f: Foo)(x: f.Num): f.Num = x
}