1 files changed, 43 insertions, 0 deletions
diff --git a/js/src/builtin/WrappedFunctionObject.h b/js/src/builtin/WrappedFunctionObject.h
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+++ b/js/src/builtin/WrappedFunctionObject.h
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+/* -*- 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 builtin_WrappedFunctionObject_h
+#define builtin_WrappedFunctionObject_h
+
+#include "js/Value.h"
+#include "vm/NativeObject.h"
+
+namespace js {
+
+// Implementing Wrapped Function Exotic Objects from the ShadowRealms proposal
+// https://tc39.es/proposal-shadowrealm/#sec-wrapped-function-exotic-objects
+//
+// These are produced as callables are passed across ShadowRealm boundaries,
+// preventing functions from piercing the shadow realm barrier.
+class WrappedFunctionObject : public NativeObject {
+ public:
+  static const JSClass class_;
+
+  enum { WrappedTargetFunctionSlot, SlotCount };
+
+  JSObject* getTargetFunction() const {
+    return &getFixedSlot(WrappedTargetFunctionSlot).toObject();
+  }
+
+  void setTargetFunction(JSObject& obj) {
+    setFixedSlot(WrappedTargetFunctionSlot, ObjectValue(obj));
+  }
+};
+
+bool WrappedFunctionCreate(JSContext* cx, Realm* callerRealm,
+                           Handle<JSObject*> target, MutableHandle<Value> res);
+
+bool GetWrappedValue(JSContext* cx, Realm* callerRealm, Handle<Value> value,
+                     MutableHandle<Value> res);
+
+}  // namespace js
+
+#endif