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, 11 insertions, 0 deletions

diff --git a/test/files/neg/t8700a.check b/test/files/neg/t8700a.check
new file mode 100644
index 0000000000..ce7945a3fc
--- /dev/null
+++ b/test/files/neg/t8700a.check
@@ -0,0 +1,11 @@
+Bar.scala:2: warning: match may not be exhaustive.
+It would fail on the following input: B
+  def bar1(foo: Foo) = foo match {
+                       ^
+Bar.scala:6: warning: match may not be exhaustive.
+It would fail on the following input: B
+  def bar2(foo: Baz) = foo match {
+                       ^
+error: No warnings can be incurred under -Xfatal-warnings.
+two warnings found
+one error found