Recognize java enums as constants from source.

Fixed up one of the mismatches between how java source is modeled
and how java bytecode is modeled.  We should get the rest of them
too.  Closes SI-2764.

1 files changed, 8 insertions, 0 deletions

diff --git a/src/compiler/scala/tools/nsc/typechecker/Namers.scala b/src/compiler/scala/tools/nsc/typechecker/Namers.scala
index ca4b1d3de8..e4b744dffc 100644
--- a/src/compiler/scala/tools/nsc/typechecker/Namers.scala
+++ b/src/compiler/scala/tools/nsc/typechecker/Namers.scala
@@ -567,7 +567,15 @@ trait Namers extends MethodSynthesis {
         assignAndEnterFinishedSymbol(tree)
       else
         enterGetterSetter(tree)
+
+      // When java enums are read from bytecode, they are known to have
+      // constant types by the jvm flag and assigned accordingly.  When
+      // they are read from source, the java parser marks them with the
+      // STABLE flag, and now we receive that signal.
+      if (tree.symbol hasAllFlags STABLE | JAVA)
+        tree.symbol setInfo ConstantType(Constant(tree.symbol))
     }
+
     def enterLazyVal(tree: ValDef, lazyAccessor: Symbol): TermSymbol = {
       // If the owner is not a class, this is a lazy val from a method,
       // with no associated field.  It has an accessor with $lzy appended to its name and