Add toExprOfTuple in scala.quoted

Author: nicolasstucki

library/src/scala/quoted/package.scala

@@ -56,7 +56,7 @@ package object quoted {
 
    /** Lifts this sequence of expressions into an expression of a sequence
     *
-    *  Transforms a list of expression
+    *  Transforms a sequence of expression
     *    `Seq(e1, e2, ...)` where `ei: Expr[T]`
     *  to an expression equivalent to
     *    `'{ Seq($e1, $e2, ...) }` typed as an `Expr[Seq[T]]`
@@ -81,7 +81,41 @@ package object quoted {
     def (list: List[Expr[T]]) toExprOfList[T] given Type[T], QuoteContext: Expr[List[T]] =
       if (list.isEmpty) '{ Nil } else '{ List(${list.toExprOfSeq}: _*) }
 
+     /** Lifts this sequence of expressions into an expression of a tuple
+     *
+     *  Transforms a sequence of expression
+     *    `Seq(e1, e2, ...)` where `ei: Expr[_]`
+     *  to an expression equivalent to
+     *    `'{ ($e1, $e2, ...) }` typed as an `Expr[Tuple]`
+     */
+    def (seq: Seq[Expr[_]]) toExprOfTuple given QuoteContext: Expr[Tuple] = {
+      seq.size match {
+        case 1 => '{ Tuple1(${seq(0)}) }
+        case 2 => '{ Tuple2(${seq(0)}, ${seq(1)}) }
+        case 3 => '{ Tuple3(${seq(0)}, ${seq(1)}, ${seq(2)}) }
+        case 4 => '{ Tuple4(${seq(0)}, ${seq(1)}, ${seq(2)}, ${seq(3)}) }
+        case 5 => '{ Tuple5(${seq(0)}, ${seq(1)}, ${seq(2)}, ${seq(3)}, ${seq(4)}) }
+        case 6 => '{ Tuple6(${seq(0)}, ${seq(1)}, ${seq(2)}, ${seq(3)}, ${seq(4)}, ${seq(5)}) }
+        case 7 => '{ Tuple7(${seq(0)}, ${seq(1)}, ${seq(2)}, ${seq(3)}, ${seq(4)}, ${seq(5)}, ${seq(6)}) }
+        case 8 => '{ Tuple8(${seq(0)}, ${seq(1)}, ${seq(2)}, ${seq(3)}, ${seq(4)}, ${seq(5)}, ${seq(6)}, ${seq(7)}) }
+        case 9 => '{ Tuple9(${seq(0)}, ${seq(1)}, ${seq(2)}, ${seq(3)}, ${seq(4)}, ${seq(5)}, ${seq(6)}, ${seq(7)}, ${seq(8)}) }
+        case 10 => '{ Tuple10(${seq(0)}, ${seq(1)}, ${seq(2)}, ${seq(3)}, ${seq(4)}, ${seq(5)}, ${seq(6)}, ${seq(7)}, ${seq(8)}, ${seq(9)}) }
+        case 11 => '{ Tuple11(${seq(0)}, ${seq(1)}, ${seq(2)}, ${seq(3)}, ${seq(4)}, ${seq(5)}, ${seq(6)}, ${seq(7)}, ${seq(8)}, ${seq(9)}, ${seq(10)}) }
+        case 12 => '{ Tuple12(${seq(0)}, ${seq(1)}, ${seq(2)}, ${seq(3)}, ${seq(4)}, ${seq(5)}, ${seq(6)}, ${seq(7)}, ${seq(8)}, ${seq(9)}, ${seq(10)}, ${seq(11)}) }
+        case 13 => '{ Tuple13(${seq(0)}, ${seq(1)}, ${seq(2)}, ${seq(3)}, ${seq(4)}, ${seq(5)}, ${seq(6)}, ${seq(7)}, ${seq(8)}, ${seq(9)}, ${seq(10)}, ${seq(11)}, ${seq(12)}) }
+        case 14 => '{ Tuple14(${seq(0)}, ${seq(1)}, ${seq(2)}, ${seq(3)}, ${seq(4)}, ${seq(5)}, ${seq(6)}, ${seq(7)}, ${seq(8)}, ${seq(9)}, ${seq(10)}, ${seq(11)}, ${seq(12)}, ${seq(13)}) }
+        case 15 => '{ Tuple15(${seq(0)}, ${seq(1)}, ${seq(2)}, ${seq(3)}, ${seq(4)}, ${seq(5)}, ${seq(6)}, ${seq(7)}, ${seq(8)}, ${seq(9)}, ${seq(10)}, ${seq(11)}, ${seq(12)}, ${seq(13)}, ${seq(14)}) }
+        case 16 => '{ Tuple16(${seq(0)}, ${seq(1)}, ${seq(2)}, ${seq(3)}, ${seq(4)}, ${seq(5)}, ${seq(6)}, ${seq(7)}, ${seq(8)}, ${seq(9)}, ${seq(10)}, ${seq(11)}, ${seq(12)}, ${seq(13)}, ${seq(14)}, ${seq(15)}) }
+        case 17 => '{ Tuple17(${seq(0)}, ${seq(1)}, ${seq(2)}, ${seq(3)}, ${seq(4)}, ${seq(5)}, ${seq(6)}, ${seq(7)}, ${seq(8)}, ${seq(9)}, ${seq(10)}, ${seq(11)}, ${seq(12)}, ${seq(13)}, ${seq(14)}, ${seq(15)}, ${seq(16)}) }
+        case 18 => '{ Tuple18(${seq(0)}, ${seq(1)}, ${seq(2)}, ${seq(3)}, ${seq(4)}, ${seq(5)}, ${seq(6)}, ${seq(7)}, ${seq(8)}, ${seq(9)}, ${seq(10)}, ${seq(11)}, ${seq(12)}, ${seq(13)}, ${seq(14)}, ${seq(15)}, ${seq(16)}, ${seq(17)}) }
+        case 19 => '{ Tuple19(${seq(0)}, ${seq(1)}, ${seq(2)}, ${seq(3)}, ${seq(4)}, ${seq(5)}, ${seq(6)}, ${seq(7)}, ${seq(8)}, ${seq(9)}, ${seq(10)}, ${seq(11)}, ${seq(12)}, ${seq(13)}, ${seq(14)}, ${seq(15)}, ${seq(16)}, ${seq(17)}, ${seq(18)}) }
+        case 20 => '{ Tuple20(${seq(0)}, ${seq(1)}, ${seq(2)}, ${seq(3)}, ${seq(4)}, ${seq(5)}, ${seq(6)}, ${seq(7)}, ${seq(8)}, ${seq(9)}, ${seq(10)}, ${seq(11)}, ${seq(12)}, ${seq(13)}, ${seq(14)}, ${seq(15)}, ${seq(16)}, ${seq(17)}, ${seq(18)}, ${seq(19)}) }
+        case 21 => '{ Tuple21(${seq(0)}, ${seq(1)}, ${seq(2)}, ${seq(3)}, ${seq(4)}, ${seq(5)}, ${seq(6)}, ${seq(7)}, ${seq(8)}, ${seq(9)}, ${seq(10)}, ${seq(11)}, ${seq(12)}, ${seq(13)}, ${seq(14)}, ${seq(15)}, ${seq(16)}, ${seq(17)}, ${seq(18)}, ${seq(19)}, ${seq(20)}) }
+        case 22 => '{ Tuple22(${seq(0)}, ${seq(1)}, ${seq(2)}, ${seq(3)}, ${seq(4)}, ${seq(5)}, ${seq(6)}, ${seq(7)}, ${seq(8)}, ${seq(9)}, ${seq(10)}, ${seq(11)}, ${seq(12)}, ${seq(13)}, ${seq(14)}, ${seq(15)}, ${seq(16)}, ${seq(17)}, ${seq(18)}, ${seq(19)}, ${seq(20)}, ${seq(21)}) }
+        case _ => '{ Tuple.fromIArray(IArray(${seq.toExprOfSeq}: _*)) }
+      }
 
+    }
   }
 
 }