Generators return boxed values

src/contexts.h

Index: src/contexts.h
diff --git a/src/contexts.h b/src/contexts.h
index 2672487531f4ec478e7f18ef89aa9bcfb2f148a0..1d5947dfb2b74711f9c8bd94df9c82a197c5528b 100644
--- a/src/contexts.h
+++ b/src/contexts.h
@@ -179,6 +179,7 @@ enum BindingFlags {
     strict_mode_generator_function_map) \
   V(GENERATOR_OBJECT_PROTOTYPE_MAP_INDEX, Map, \
     generator_object_prototype_map) \
+  V(ITERATOR_RESULT_MAP_INDEX, Map, iterator_result_map) \
   V(RANDOM_SEED_INDEX, ByteArray, random_seed)
 
 // JSFunctions are pairs (context, function code), sometimes also called
@@ -321,6 +322,7 @@ class Context: public FixedArray {
     GENERATOR_FUNCTION_MAP_INDEX,
     STRICT_MODE_GENERATOR_FUNCTION_MAP_INDEX,
     GENERATOR_OBJECT_PROTOTYPE_MAP_INDEX,
+    ITERATOR_RESULT_MAP_INDEX,

[Michael Starzinger, 2013/05/06 11:22:32]

Let's rename this to GENERATOR_RESULT_MAP_INDEX as it is only used for
generators internally. The result of arbitrary iterators might use a completely
different map.

     RANDOM_SEED_INDEX,
 
     // Properties from here are treated as weak references by the full GC.