Always load REPL classes in macros including the output directory (#16866)

Fixes #15104

Also re-enable `compiler/test-resources/repl-macros` tests.

Author: nicolasstucki

compiler/src/dotty/tools/dotc/quoted/Interpreter.scala

@@ -32,10 +32,15 @@ import dotty.tools.dotc.reporting.Message
 import dotty.tools.repl.AbstractFileClassLoader
 
 /** Tree interpreter for metaprogramming constructs */
-class Interpreter(pos: SrcPos, classLoader: ClassLoader)(using Context):
+class Interpreter(pos: SrcPos, classLoader0: ClassLoader)(using Context):
   import Interpreter._
   import tpd._
 
+  val classLoader =
+    if ctx.owner.topLevelClass.name.startsWith(str.REPL_SESSION_LINE) then
+        new AbstractFileClassLoader(ctx.settings.outputDir.value, classLoader0)
+    else classLoader0
+
   /** Local variable environment */
   type Env = Map[Symbol, Object]
   def emptyEnv: Env = Map.empty
@@ -157,18 +162,12 @@ class Interpreter(pos: SrcPos, classLoader: ClassLoader)(using Context):
     args.toSeq
 
   private def interpretedStaticMethodCall(moduleClass: Symbol, fn: Symbol, args: List[Object]): Object = {
-    val (inst, clazz) =
-      try
-        if (moduleClass.name.startsWith(str.REPL_SESSION_LINE))
-          (null, loadReplLineClass(moduleClass))
-        else {
-          val inst = loadModule(moduleClass)
-          (inst, inst.getClass)
-        }
+    val inst =
+      try loadModule(moduleClass)
       catch
         case MissingClassDefinedInCurrentRun(sym) =>
           suspendOnMissing(sym, pos)
-
+    val clazz = inst.getClass
     val name = fn.name.asTermName
     val method = getMethod(clazz, name, paramsSig(fn))
     stopIfRuntimeException(method.invoke(inst, args: _*), method)

compiler/test-resources/repl-macros/i15104a

@@ -0,0 +1,7 @@
+scala> import scala.quoted._
+scala> object Foo { def macroImpl(using Quotes) = Expr(1) }
+// defined object Foo
+scala> inline def foo = ${ Foo.macroImpl }
+def foo: Int
+scala> foo
+val res0: Int = 1

compiler/test-resources/repl-macros/i15104b

@@ -0,0 +1,5 @@
+scala> import scala.quoted._
+scala> object Foo { def macroImpl(using Quotes) = Expr(1); inline def foo = ${ Foo.macroImpl } }
+// defined object Foo
+scala> Foo.foo
+val res0: Int = 1

compiler/test-resources/repl-macros/i15104c

@@ -0,0 +1,7 @@
+scala> import scala.quoted._
+scala> def macroImpl(using Quotes) = Expr(1)
+def macroImpl(using x$1: quoted.Quotes): quoted.Expr[Int]
+scala> inline def foo = ${ macroImpl }
+def foo: Int
+scala> foo
+val res0: Int = 1

compiler/test-resources/repl-macros/i5551

@@ -1,8 +1,7 @@
 scala> import scala.quoted._
 scala> def assertImpl(expr: Expr[Boolean])(using q: Quotes) = '{ if !($expr) then throw new AssertionError("failed assertion")}
 def assertImpl
-  (expr: quoted.Expr[Boolean])
-     (using q: quoted.Quotes): quoted.Expr[Unit]
+  (expr: quoted.Expr[Boolean])(using q: quoted.Quotes): quoted.Expr[Unit]
 scala>   inline def assert(expr: => Boolean): Unit =  ${ assertImpl('{expr}) }
 def assert(expr: => Boolean): Unit
 

compiler/test/dotty/tools/repl/ScriptedTests.scala

@@ -3,12 +3,16 @@ package tools
 package repl
 
 import org.junit.Test
+import org.junit.experimental.categories.Category
 
 /** Runs all tests contained in `compiler/test-resources/repl/` */
 class ScriptedTests extends ReplTest {
 
   @Test def replTests = scripts("/repl").foreach(testFile)
 
+  @Category(Array(classOf[BootstrappedOnlyTests]))
+  @Test def replMacrosTests = scripts("/repl-macros").foreach(testFile)
+
   @Test def typePrinterTests = scripts("/type-printer").foreach(testFile)
 }