Add quoted.Liftable[Set[T]] to the stdlib

Author: nicolasstucki

library/src/scala/quoted/Liftable.scala

@@ -66,6 +66,11 @@ object Liftable {
     }
   }
 
+  given [T: Type: Liftable] as Liftable[Set[T]] = new Liftable[Set[T]] {
+    def toExpr(set: Set[T]): given QuoteContext => Expr[Set[T]] =
+      '{ Set(${set.toSeq.toExpr}: _*) }
+  }
+
   given [T: Type: Liftable] as Liftable[Option[T]] = new Liftable[Option[T]] {
     def toExpr(x: Option[T]): given QuoteContext => Expr[Option[T]] = x match {
       case Some(x) => '{ Some[T](${x.toExpr}) }

tests/run-with-compiler/quote-lib.scala

@@ -32,6 +32,9 @@ object Test {
     val seq: Seq[Int] = Seq(1, 2, 3)
     val liftedSeq: Expr[Seq[Int]] = seq
 
+    val set: Set[Int] = Set(1, 2, 3)
+    val liftedSet: Expr[Set[Int]] = set
+
     liftedList.foldLeft[Int](0)('{ (acc: Int, x: Int) => acc + x }).show
     liftedList.foreach('{ (x: Int) => println(x) }).show