1 files changed, 42 insertions, 0 deletions
diff --git a/js/src/frontend/ScriptIndex.h b/js/src/frontend/ScriptIndex.h
new file mode 100644
index 0000000000..ed16b6be57
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+++ b/js/src/frontend/ScriptIndex.h
@@ -0,0 +1,42 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ * 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 frontend_ScriptIndex_h
+#define frontend_ScriptIndex_h
+
+#include <utility>
+
+#include "frontend/TypedIndex.h"  // TypedIndex
+#include "js/GCPolicyAPI.h"       // JS::GCPolicy, JS::IgnoreGCPolicy
+
+namespace js {
+namespace frontend {
+
+class ScriptStencil;
+
+using ScriptIndex = TypedIndex<ScriptStencil>;
+
+// Represents a range for scripts [start, limit).
+struct ScriptIndexRange {
+  ScriptIndex start;
+  ScriptIndex limit;
+
+  ScriptIndexRange(ScriptIndex start, ScriptIndex limit)
+      : start(start), limit(limit) {
+    MOZ_ASSERT(start < limit);
+  }
+};
+
+} /* namespace frontend */
+} /* namespace js */
+
+namespace JS {
+template <>
+struct GCPolicy<js::frontend::ScriptIndexRange>
+    : public IgnoreGCPolicy<js::frontend::ScriptIndexRange> {};
+}  // namespace JS
+
+#endif /* frontend_ScriptIndex_h */