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

Author: nicolasstucki

library/src/scala/quoted/Liftable.scala

@@ -52,6 +52,13 @@ object Liftable {
     }
   }
 
+  given [T: Type: Liftable] as Liftable[Seq[T]] = new Liftable[Seq[T]] {
+    def toExpr(seq: Seq[T]): given QuoteContext => Expr[Seq[T]] = given qctx => {
+      import qctx.tasty._
+      Repeated(seq.map(x => the[Liftable[T]].toExpr(x).unseal).toList, the[quoted.Type[T]].unseal).seal.asInstanceOf[Expr[Seq[T]]]
+    }
+  }
+
   given [T: Type: Liftable] as Liftable[List[T]] = new Liftable[List[T]] {
     def toExpr(x: List[T]): given QuoteContext => Expr[List[T]] = x match {
       case x :: xs  => '{ (${xs.toExpr}).::[T](${x.toExpr}) }

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

@@ -29,6 +29,9 @@ object Test {
     val list: List[Int] = List(1, 2, 3)
     val liftedList: Expr[List[Int]] = list
 
+    val seq: Seq[Int] = Seq(1, 2, 3)
+    val liftedSeq: Expr[Seq[Int]] = seq
+
     liftedList.foldLeft[Int](0)('{ (acc: Int, x: Int) => acc + x }).show
     liftedList.foreach('{ (x: Int) => println(x) }).show