1 files changed, 46 insertions, 0 deletions
diff --git a/js/public/shadow/Shape.h b/js/public/shadow/Shape.h
new file mode 100644
index 0000000000..754f465162
--- /dev/null
+++ b/js/public/shadow/Shape.h
@@ -0,0 +1,46 @@
+/* -*- 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/. */
+
+/*
+ * Shadow definition of |js::BaseShape| and |js::Shape| innards.  Do not use
+ * this directly!
+ */
+
+#ifndef js_shadow_Shape_h
+#define js_shadow_Shape_h
+
+#include <stdint.h>  // uint32_t
+
+#include "jstypes.h"  // JS_PUBLIC_API
+
+#include "js/Id.h"  // JS::PropertyKey
+
+struct JSClass;
+class JS_PUBLIC_API JSObject;
+
+namespace JS {
+
+namespace shadow {
+
+struct BaseShape {
+  const JSClass* clasp_;
+};
+
+class Shape {
+ public:
+  shadow::BaseShape* base;
+  JS::PropertyKey _1;
+  uint32_t immutableFlags;
+
+  static constexpr uint32_t FIXED_SLOTS_SHIFT = 24;
+  static constexpr uint32_t FIXED_SLOTS_MASK = 0x1f << FIXED_SLOTS_SHIFT;
+};
+
+}  // namespace shadow
+
+}  // namespace JS
+
+#endif  // js_shadow_Shape_h