add get-enum-vals (#737)

test/goalc/source_templates/with_game/test-get-enum-vals.gc

@@ -0,0 +1,14 @@
+(defenum test-val-enum
+  (thing1 1)
+  (thing3 3)
+  (thing5 5)
+  )
+
+(defmacro test-enum-vals ()
+  (let ((enum-list (get-enum-vals 'test-val-enum)))
+    `(quote ,enum-list)
+    )
+  )
+
+(printl (test-enum-vals))
+0

test/goalc/test_with_game.cpp

@@ -824,6 +824,12 @@ TEST_F(WithGameTests, StackInlineArray) {
                           "#x30\n0\n"});
 }
 
+TEST_F(WithGameTests, GetEnumVals) {
+  runner.run_static_test(env, testCategory, "test-get-enum-vals.gc",
+                         {"((thing1 . #<invalid object #x1>) (thing3 . #<invalid object #x3>) "
+                          "(thing5 . #<invalid object #x5>))\n0\n"});
+}
+
 TEST(TypeConsistency, TypeConsistency) {
   Compiler compiler;
   compiler.enable_throw_on_redefines();