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Bound TypeRepr by Matchable in Quotes #21377

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Aug 19, 2024
Merged

Bound TypeRepr by Matchable in Quotes #21377

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2 changes: 1 addition & 1 deletion library/src/scala/quoted/Quotes.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -2640,7 +2640,7 @@ trait Quotes { self: runtime.QuoteUnpickler & runtime.QuoteMatching =>
// ----- Types ----------------------------------------------------

/** A type, type constructors, type bounds or NoPrefix */
type TypeRepr
type TypeRepr <: Matchable

/** Module object of `type TypeRepr` */
val TypeRepr: TypeReprModule
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18 changes: 18 additions & 0 deletions tests/pos/i21282.scala
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@@ -0,0 +1,18 @@
//> using options -Xfatal-warnings -source:future-migration

import scala.quoted.*

private def isUnionCanonicalImpl[U: Type](using Quotes): Expr[Unit] =
import quotes.reflect.*
val u = TypeRepr.of[U].dealiasKeepOpaques

def inner[U: Type](s: Set[TypeRepr], tr: TypeRepr): Set[TypeRepr] =
tr.dealiasKeepOpaques match
case OrType(a, b) =>
val ss = inner[U](s, a)
inner[U](ss, b)
case x if s.contains(x) =>
report.errorAndAbort(s"Type ${x.show} multiple times (CHECK ALIASES) in union ${u.show}")
case x => s + x
inner(Set.empty, u)
'{ () }
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