Query methods in api.Symbols for Java flags

Adds query methods to the public reflection API for querying the
JAVA_ENUM and JAVA_ANNOTATION flags.

Didn't include JAVA_DEFAULTMETHOD because it does not correspond
to a real java classfile flag (just a non-abstract method in an
interface), and we want to clean the usage of this flag before adding
it to a public API.

The flags themselfs are not added to the reflection API. A comment in
api/FlagSets.scala says:

    Q: I have a pretty flag. Can I put it here?
    A: Only if there's a tree that cannot be built without it.
       If you want to put a flag here so that it can be tested
       against, introduce an `isXXX` method in one of the api.Symbols
       classes instead.

1 files changed, 7 insertions, 0 deletions

diff --git a/test/junit/scala/tools/nsc/symtab/FlagsTest.scala b/test/junit/scala/tools/nsc/symtab/FlagsTest.scala
index fc0e8b0f6b..08a37fcb3c 100644
--- a/test/junit/scala/tools/nsc/symtab/FlagsTest.scala
+++ b/test/junit/scala/tools/nsc/symtab/FlagsTest.scala
@@ -86,4 +86,11 @@ class FlagsTest {
 
     assertEquals(withFlagMask(AllFlags)(sym.setFlag(lateFlags).flags), lateFlags | lateable)
   }
+
+  @Test
+  def javaClassMirrorAnnotationFlag(): Unit = {
+    import scala.reflect.runtime.universe._
+    val dep = typeOf[java.lang.Deprecated].typeSymbol
+    assertTrue(dep.isJavaAnnotation && dep.isJava)
+  }
 }