1 files changed, 10 insertions, 2 deletions
diff --git a/js/src/frontend/NameAnalysisTypes.h b/js/src/frontend/NameAnalysisTypes.h
index d39e177fb..b94ca6cc0 100644
--- a/js/src/frontend/NameAnalysisTypes.h
+++ b/js/src/frontend/NameAnalysisTypes.h
@@ -124,6 +124,7 @@ DeclarationKindIsLexical(DeclarationKind kind)
 // Used in Parser to track declared names.
 class DeclaredNameInfo
 {
+    uint32_t pos_;
     DeclarationKind kind_;
 
     // If the declared name is a binding, whether the binding is closed
@@ -132,8 +133,9 @@ class DeclaredNameInfo
     bool closedOver_;
 
   public:
-    explicit DeclaredNameInfo(DeclarationKind kind)
-      : kind_(kind),
+    explicit DeclaredNameInfo(DeclarationKind kind, uint32_t pos)
+      : pos_(pos),
+        kind_(kind),
         closedOver_(false)
     { }
 
@@ -144,6 +146,12 @@ class DeclaredNameInfo
         return kind_;
     }
 
+    static const uint32_t npos = uint32_t(-1);
+
+    uint32_t pos() const {
+        return pos_;
+    }
+
     void alterKind(DeclarationKind kind) {
         kind_ = kind;
     }