SI-8700 Exhaustiveness warning for enums from Java source

Until now, the warning was only emitted for enums from Java class files.

This commit fixes it by
- aligning the flags set in JavaParsers with the flags set in
  ClassfileParser (which are required by the pattern matcher to
  even consider checking exhaustiveness)
- adding the enum members as childs to the class holding the enum
  as done in ClassfileParser so that the pattern matcher sees the enum
  members when looking for the sealed children of a type

1 files changed, 1 insertions, 1 deletions

diff --git a/src/compiler/scala/tools/nsc/symtab/classfile/ClassfileParser.scala b/src/compiler/scala/tools/nsc/symtab/classfile/ClassfileParser.scala
index 99e61d2482..406411f21f 100644
--- a/src/compiler/scala/tools/nsc/symtab/classfile/ClassfileParser.scala
+++ b/src/compiler/scala/tools/nsc/symtab/classfile/ClassfileParser.scala
@@ -542,7 +542,7 @@ abstract class ClassfileParser {
             devWarning(s"no linked class for java enum $sym in ${sym.owner}. A referencing class file might be missing an InnerClasses entry.")
           case linked =>
             if (!linked.isSealed)
-              // Marking the enum class SEALED | ABSTRACT enables exhaustiveness checking.
+              // Marking the enum class SEALED | ABSTRACT enables exhaustiveness checking. See also JavaParsers.
               // This is a bit of a hack and requires excluding the ABSTRACT flag in the backend, see method javaClassfileFlags.
               linked setFlag (SEALED | ABSTRACT)
             linked addChild sym