1 files changed, 44 insertions, 0 deletions
diff --git a/js/src/ds/IdValuePair.h b/js/src/ds/IdValuePair.h
new file mode 100644
index 000000000..000fdcf66
--- /dev/null
+++ b/js/src/ds/IdValuePair.h
@@ -0,0 +1,44 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=8 sts=4 et sw=4 tw=99:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef ds_IdValuePair_h
+#define ds_IdValuePair_h
+
+#include "jsapi.h"
+
+#include "NamespaceImports.h"
+#include "gc/Tracer.h"
+#include "js/GCVector.h"
+#include "js/Id.h"
+
+namespace js {
+
+struct IdValuePair
+{
+    Value value;
+    jsid id;
+
+    IdValuePair()
+      : value(UndefinedValue()), id(JSID_EMPTY)
+    {}
+    explicit IdValuePair(jsid idArg)
+      : value(UndefinedValue()), id(idArg)
+    {}
+    IdValuePair(jsid idArg, const Value& valueArg)
+      : value(valueArg), id(idArg)
+    {}
+
+    void trace(JSTracer* trc) {
+        TraceRoot(trc, &value, "IdValuePair::value");
+        TraceRoot(trc, &id, "IdValuePair::id");
+    }
+};
+
+using IdValueVector = JS::GCVector<IdValuePair>;
+
+} /* namespace js */
+
+#endif /* ds_IdValuePair_h */