Handle $asInstanceOf$ in Splicer

Before that commit macro expansion would fail with:

"Could not find method Box$.$asInstanceOf$ with parameters (). The most common reason for that is that you apply macros in the compilation run that defines them"

Author: OlivierBlanvillain

compiler/src/dotty/tools/dotc/transform/Splicer.scala

@@ -193,8 +193,12 @@ object Splicer {
           val staticMethodCall = interpretedStaticMethodCall(fn.symbol.owner, fn.symbol)
           staticMethodCall(args.flatten.map(interpretTree))
         } else if (fn.qualifier.symbol.is(Module) && fn.qualifier.symbol.isStatic) {
-          val staticMethodCall = interpretedStaticMethodCall(fn.qualifier.symbol.moduleClass, fn.symbol)
-          staticMethodCall(args.flatten.map(interpretTree))
+          if (fn.name == nme.asInstanceOfPM) {
+            interpretModuleAccess(fn.qualifier.symbol)
+          } else {
+            val staticMethodCall = interpretedStaticMethodCall(fn.qualifier.symbol.moduleClass, fn.symbol)
+            staticMethodCall(args.flatten.map(interpretTree))
+          }
         } else if (env.contains(fn.name)) {
           env(fn.name)
         } else if (tree.symbol.is(InlineProxy)) {
@@ -265,7 +269,6 @@ object Splicer {
 
       val name = getDirectName(fn.info.finalResultType, fn.name.asTermName)
       val method = getMethod(clazz, name, paramsSig(fn))
-
       (args: List[Object]) => stopIfRuntimeException(method.invoke(inst, args: _*))
     }
 

tests/run-macros/dollar-asInstanceOf-dollar/1.scala

@@ -0,0 +1,12 @@
+import scala.quoted._
+import scala.deriving._
+
+case class Box[A](x: A)
+
+object Macro {
+  inline def foo[X[_]](implicit inline m: Mirror { type MirroredType = X }): Int =
+    ${ fooImpl }
+
+  def fooImpl[X[_]](implicit m: Mirror { type MirroredType = X }, qc: QuoteContext): Expr[Int] =
+    '{ 1 }
+}

tests/run-macros/dollar-asInstanceOf-dollar/2.scala

@@ -0,0 +1,4 @@
+object Test {
+  def main(args: Array[String]): Unit =
+    assert(Macro.foo[Box] == 1)
+}