Avoid Predef.getClass

In top level definitions we used to get `DottyPredef.getClass` when we did `getClass`. Now we get `Predef.getClass` which get us a class that was loaded with the wrong classloader.

Author: nicolasstucki

tests/run-staging/i7897.scala

@@ -1,14 +1,14 @@
 import scala.quoted._, staging._
 
-given Toolbox = Toolbox.make(getClass.getClassLoader)
+object Test:
+  given Toolbox = Toolbox.make(getClass.getClassLoader)
 
-val f: Array[Int] => Int = run {
-  val stagedSum: Expr[Array[Int] => Int] = '{ (arr: Array[Int]) => 6 }
-  println(stagedSum.show)
-  stagedSum
-}
+  val f: Array[Int] => Int = run {
+    val stagedSum: Expr[Array[Int] => Int] = '{ (arr: Array[Int]) => 6 }
+    println(stagedSum.show)
+    stagedSum
+  }
 
-@main
-def Test = {
-  f.apply(Array(1, 2, 3)) // Returns 6
-}
+  def main(args: Array[String]) = {
+    f.apply(Array(1, 2, 3)) // Returns 6
+ }

tests/run-staging/i8178.scala

@@ -5,11 +5,12 @@ def foo(n: Int, t: Expr[Int])(using Quotes): Expr[Int] =
   if (n == 0) t
   else '{ val a = ${Expr(n)}; ${foo(n - 1, 'a)} + $t  }
 
-@main def Test = {
-  // make available the necessary toolbox for runtime code generation
-  given Toolbox = Toolbox.make(getClass.getClassLoader)
+object Test:
+  def main(args: Array[String]) = {
+    // make available the necessary toolbox for runtime code generation
+    given Toolbox = Toolbox.make(getClass.getClassLoader)
 
-  val f: Int = run { foo(2, Expr(5)) }
+    val f: Int = run { foo(2, Expr(5)) }
 
-  println(f)
-}
+    println(f)
+  }