Add quoted.Liftable[Either[L, R]] to the stdlib

Author: nicolasstucki

library/src/scala/quoted/Liftable.scala

@@ -66,4 +66,11 @@ object Liftable {
     }
   }
 
+  given [L: Type: Liftable, R: Type: Liftable] as Liftable[Either[L, R]] = new Liftable[Either[L, R]] {
+    def toExpr(x: Either[L, R]): given QuoteContext => Expr[Either[L, R]] = x match {
+      case Left(x) => '{ Left[L, R](${x.toExpr}) }
+      case Right(x) => '{ Right[L, R](${x.toExpr}) }
+    }
+  }
+
 }

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

@@ -43,6 +43,11 @@ object Test {
     val liftedSome: Expr[Option[Int]] = some
     val liftedNone: Expr[Option[Int]] = none
 
+    val left: Either[Int, Long] = Left(1)
+    val right: Either[Int, Long] = Right(2L)
+    left.toExpr
+    right.toExpr
+
     println("quote lib ok")
   }
 }