Add toExpr extension method to all liftable classes

Requires importing Liftable._

Author: nicolasstucki

library/src/scala/quoted/Liftable.scala

@@ -14,6 +14,10 @@ abstract class Liftable[T] {
  */
 object Liftable {
 
+  implicit class LiftExprOps[T](val x: T) extends AnyVal {
+    def toExpr(implicit liftable: Liftable[T]): Expr[T] = liftable.toExpr(x)
+  }
+
   final class ConstantExpr[T] private[Liftable](val value: T) extends Expr[T] {
     override def toString: String = s"Expr($value)"
   }

tests/pos/quote-lift.scala

@@ -0,0 +1,18 @@
+import scala.quoted._
+
+object Test {
+  '{ ~(1: Expr[Int]) }
+
+  '{ ~implicitly[Liftable[Int]].toExpr(1) }
+
+  {
+    import Liftable._
+
+    '{ ~IntIsLiftable.toExpr(1) }
+
+    '{ ~1.toExpr }
+
+  }
+
+
+}