Add quoted.Liftable[Map[T, U]] to the stdlib

scala · Jul 25, 2019 · 08d9b6b · 08d9b6b
1 parent 4cfbff9
commit 08d9b6b
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diff --git a/library/src/scala/quoted/Liftable.scala b/library/src/scala/quoted/Liftable.scala
@@ -71,6 +71,11 @@ object Liftable {
       '{ Set(${set.toSeq.toExpr}: _*) }
   }
 
+  given [T: Type: Liftable, U: Type: Liftable] as Liftable[Map[T, U]] = new Liftable[Map[T, U]] {
+    def toExpr(map: Map[T, U]): given QuoteContext => Expr[Map[T, U]] =
+    '{ Map(${map.toSeq.toExpr}: _*) }
+  }
+
   given [T: Type: Liftable] as Liftable[Option[T]] = new Liftable[Option[T]] {
     def toExpr(x: Option[T]): given QuoteContext => Expr[Option[T]] = x match {
       case Some(x) => '{ Some[T](${x.toExpr}) }

diff --git a/tests/run-with-compiler/quote-lib.scala b/tests/run-with-compiler/quote-lib.scala
@@ -56,6 +56,9 @@ object Test {
     val set: Set[Int] = Set(1, 2, 3)
     val liftedSet: Expr[Set[Int]] = set
 
+    val map: Map[Int, Char] = Map(1 -> 'a', 2 -> 'b', 3 -> 'c')
+    val liftedMap: Expr[Map[Int, Char]] = map
+
     liftedList.foldLeft[Int](0)('{ (acc: Int, x: Int) => acc + x }).show
     liftedList.foreach('{ (x: Int) => println(x) }).show