Add forward compat tests for macros

Author: nicolasstucki

tests/pos-macros/forwardCompat-3.0/Macro_1_c3.0.scala

@@ -0,0 +1,13 @@
+import scala.quoted.*
+
+object Power:
+
+  inline def power(x: Double, inline n: Int) = ${ powerCode('x, 'n) }
+
+  private def powerCode(x: Expr[Double], n: Expr[Int])(using Quotes): Expr[Double] =
+    unrolledPowerCode(x, n.valueOrError)
+
+  private def unrolledPowerCode(x: Expr[Double], n: Int)(using Quotes): Expr[Double] =
+    if n == 0 then '{ 1.0 }
+    else if n % 2 == 1 then '{ $x * ${ unrolledPowerCode(x, n - 1) } }
+    else '{ val y = $x * $x; ${ unrolledPowerCode('y, n / 2) } }

tests/pos-macros/forwardCompat-3.0/Test_2.scala

@@ -0,0 +1,6 @@
+def testPower(x: Double): Unit =
+  import Power.power
+  power(x, 0)
+  power(x, 1)
+  power(x, 5)
+  power(x, 10)

tests/pos-macros/forwardCompat-3.1/Macro_1_c3.1.scala

@@ -0,0 +1,13 @@
+import scala.quoted.*
+
+object Power:
+
+  inline def power(x: Double, inline n: Int) = ${ powerCode('x, 'n) }
+
+  private def powerCode(x: Expr[Double], n: Expr[Int])(using Quotes): Expr[Double] =
+    unrolledPowerCode(x, n.valueOrError)
+
+  private def unrolledPowerCode(x: Expr[Double], n: Int)(using Quotes): Expr[Double] =
+    if n == 0 then '{ 1.0 }
+    else if n % 2 == 1 then '{ $x * ${ unrolledPowerCode(x, n - 1) } }
+    else '{ val y = $x * $x; ${ unrolledPowerCode('y, n / 2) } }

tests/pos-macros/forwardCompat-3.1/Test_2.scala

@@ -0,0 +1,6 @@
+def testPower(x: Double): Unit =
+  import Power.power
+  power(x, 0)
+  power(x, 1)
+  power(x, 5)
+  power(x, 10)