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| 1 | +import scala.annotation.tailrec |
| 2 | +import scala.quoted._ |
| 3 | + |
| 4 | +object Test { |
| 5 | + implicit val toolbox: scala.quoted.Toolbox = dotty.tools.dotc.quoted.Toolbox.make |
| 6 | + |
| 7 | + def main(args: Array[String]): Unit = { |
| 8 | + val code1 = '{ (arr: Array[Int], f: Int => Unit) => ~foreach1('(arr), '(f)) } |
| 9 | + println(code1.show) |
| 10 | + println() |
| 11 | + |
| 12 | + val code1Tpe = '{ (arr: Array[String], f: String => Unit) => ~foreach1Tpe1('(arr), '(f)) } |
| 13 | + println(code1Tpe.show) |
| 14 | + println() |
| 15 | + |
| 16 | + val code1Tpe2 = '{ (arr: Array[String], f: String => Unit) => ~foreach1Tpe1('(arr), '(f)) } |
| 17 | + println(code1Tpe2.show) |
| 18 | + println() |
| 19 | + |
| 20 | + val code2 = '{ (arr: Array[Int]) => ~foreach1('(arr), '(i => System.out.println(i))) } |
| 21 | + println(code2.show) |
| 22 | + println() |
| 23 | + |
| 24 | + val code3 = '{ (arr: Array[Int], f: Int => Unit) => ~foreach3('(arr), '(f)) } |
| 25 | + println(code3.show) |
| 26 | + println() |
| 27 | + |
| 28 | + val code4 = '{ (arr: Array[Int], f: Int => Unit) => ~foreach4('(arr), '(f), 4) } |
| 29 | + println(code4.show) |
| 30 | + } |
| 31 | + |
| 32 | + def foreach1(arrRef: Expr[Array[Int]], f: Expr[Int => Unit]): Expr[Unit] = '{ |
| 33 | + val size = (~arrRef).length |
| 34 | + var i = 0 |
| 35 | + while (i < size) { |
| 36 | + val element: Int = (~arrRef)(i) |
| 37 | + (~f)(element) |
| 38 | + i += 1 |
| 39 | + } |
| 40 | + } |
| 41 | + |
| 42 | + def foreach1Tpe1[T](arrRef: Expr[Array[T]], f: Expr[T => Unit])(implicit t: Type[T]): Expr[Unit] = '{ |
| 43 | + val size = (~arrRef).length |
| 44 | + var i = 0 |
| 45 | + while (i < size) { |
| 46 | + val element: ~t = (~arrRef)(i) |
| 47 | + (~f)(element) |
| 48 | + i += 1 |
| 49 | + } |
| 50 | + } |
| 51 | + |
| 52 | + def foreach1Tpe2[T: Type](arrRef: Expr[Array[T]], f: Expr[T => Unit]): Expr[Unit] = '{ |
| 53 | + val size = (~arrRef).length |
| 54 | + var i = 0 |
| 55 | + while (i < size) { |
| 56 | + val element: T = (~arrRef)(i) |
| 57 | + (~f)(element) |
| 58 | + i += 1 |
| 59 | + } |
| 60 | + } |
| 61 | + |
| 62 | + def foreach2(arrRef: Expr[Array[Int]], f: Expr[Int => Unit]): Expr[Unit] = '{ |
| 63 | + val size = (~arrRef).length |
| 64 | + var i = 0 |
| 65 | + while (i < size) { |
| 66 | + val element = (~arrRef)(i) |
| 67 | + ~f('(element)) // Use AppliedFuntion |
| 68 | + i += 1 |
| 69 | + } |
| 70 | + } |
| 71 | + |
| 72 | + def foreach3(arrRef: Expr[Array[Int]], f: Expr[Int => Unit]): Expr[Unit] = '{ |
| 73 | + val size = (~arrRef).length |
| 74 | + var i = 0 |
| 75 | + assert(size % 3 == 0) // for simplicity of the implementation |
| 76 | + while (i < size) { |
| 77 | + (~f)((~arrRef)(i)) |
| 78 | + (~f)((~arrRef)(i + 1)) |
| 79 | + (~f)((~arrRef)(i + 2)) |
| 80 | + i += 3 |
| 81 | + } |
| 82 | + } |
| 83 | + |
| 84 | + def foreach4(arrRef: Expr[Array[Int]], f: Expr[Int => Unit], unrollSize: Int): Expr[Unit] = '{ |
| 85 | + val size = (~arrRef).length |
| 86 | + var i = 0 |
| 87 | + assert(size % ~unrollSize.toExpr == 0) // for simplicity of the implementation |
| 88 | + while (i < size) { |
| 89 | + ~{ |
| 90 | + @tailrec def loop(j: Int, acc: Expr[Unit]): Expr[Unit] = |
| 91 | + if (j >= 0) loop(j - 1, '{ (~f)((~arrRef)(i + ~j.toExpr)); ~acc }) |
| 92 | + else acc |
| 93 | + loop(unrollSize - 1, '()) |
| 94 | + } |
| 95 | + i += ~unrollSize.toExpr |
| 96 | + } |
| 97 | + } |
| 98 | + |
| 99 | +} |
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