Fix #7991: don't set JavaDefined for Dotty Enum module class

compiler/src/dotty/tools/dotc/core/classfile/ClassfileConstants.scala

@@ -343,6 +343,7 @@ object ClassfileConstants {
       case JAVA_ACC_FINAL      => Final
       case JAVA_ACC_SYNTHETIC  => Synthetic
       case JAVA_ACC_STATIC     => JavaStatic
+      case JAVA_ACC_ENUM       => Enum
       case JAVA_ACC_ABSTRACT   => if (isClass) Abstract else Deferred
       case JAVA_ACC_INTERFACE  => PureInterfaceCreationFlags | JavaDefined
       case _                   => EmptyFlags

compiler/src/dotty/tools/dotc/core/classfile/ClassfileParser.scala

@@ -200,12 +200,10 @@ class ClassfileParser(
         sym.markAbsent()
       }
 
-    // eager load java enum definitions for exhaustivity check of pattern match
+    // eager load enum definitions for exhaustivity check of pattern match
     if (isEnum) {
       instanceScope.toList.map(_.ensureCompleted())
       staticScope.toList.map(_.ensureCompleted())
-      classRoot.setFlag(Flags.JavaEnumTrait)
-      moduleRoot.setFlag(Flags.JavaEnumTrait)
     }
 
     result

tests/run/i6664/Bomb_1.scala

@@ -0,0 +1,4 @@
+enum Bomb
+{
+    case Kaboom
+}

tests/run/i6664/Detonator_2.scala

@@ -0,0 +1,5 @@
+object Test
+{
+    def boom: Unit = Bomb.valueOf("Kaboom")
+    def main(args: Array[String]): Unit = println("ok!")
+}

tests/run/i6677/Enum_1.scala

@@ -0,0 +1,3 @@
+enum Foo[A] {
+  case Bar extends Foo[Int]
+}

tests/run/i6677/Test_2.scala

@@ -0,0 +1,5 @@
+object Test {
+  def main(args: Array[String]): Unit = {
+    println(Foo.Bar)
+  }
+}

tests/run/i7287/Enum_1.scala

@@ -0,0 +1,5 @@
+enum Color derives Eql {
+  case Unknown
+  case Blue(v: Int)
+  case Red(v: Int)
+}

tests/run/i7287/Test_2.scala

@@ -0,0 +1,6 @@
+object Test {
+  def main(args: Array[String]): Unit = {
+    val testData = Seq(("blah", Color.Unknown), ("red", Color.Red(10)))
+    println(testData)
+  }
+}

tests/run/i7410/Enum_1.scala

@@ -0,0 +1,3 @@
+enum E {
+  case A, B, C
+}

tests/run/i7410/Test_2.scala

@@ -0,0 +1,6 @@
+object Test {
+  def main(args: Array[String]): Unit = {
+    val a = E.A
+    println(a)
+  }
+}

tests/run/i7424/Enum_1.scala

@@ -0,0 +1,3 @@
+enum A {
+  case A1
+}

tests/run/i7424/Test_2.scala

@@ -0,0 +1,5 @@
+object Test {
+  def main(args: Array[String]): Unit = {
+    println(A.values)
+  }
+}

tests/run/i7991.scala

@@ -0,0 +1,5 @@
+enum Num { case One }
+
+object Test extends App {
+  Num.One
+}

tests/run/i7991/Num_1.scala

@@ -0,0 +1 @@
+enum Num { case One }

tests/run/i7991/Test_2.scala

@@ -0,0 +1,3 @@
+object Test extends App {
+  Num.One
+}