js/src/builtin/Boolean-inl.h
author Morgan Reschenberg <mreschenberg@mozilla.com>
Fri, 07 Aug 2020 16:54:36 +0000
changeset 543807 768023eab2270602610ef80988e29773f52d1be8
parent 449035 66eb1f485c1a3ea81372758bc92292c9428b17cd
permissions -rw-r--r--
Bug 1652809: Add rotor mochitest for headings. r=eeejay Differential Revision: https://phabricator.services.mozilla.com/D85917

/* -*- 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_Boolean_inl_h
#define builtin_Boolean_inl_h

#include "builtin/Boolean.h"

#include "vm/BooleanObject.h"
#include "vm/JSContext.h"
#include "vm/WrapperObject.h"

namespace js {

inline bool EmulatesUndefined(JSObject* obj) {
  // This may be called off the main thread. It's OK not to expose the object
  // here as it doesn't escape.
  AutoUnsafeCallWithABI unsafe(UnsafeABIStrictness::AllowPendingExceptions);
  JSObject* actual = MOZ_LIKELY(!obj->is<WrapperObject>())
                         ? obj
                         : UncheckedUnwrapWithoutExpose(obj);
  return actual->getClass()->emulatesUndefined();
}

} /* namespace js */

#endif /* builtin_Boolean_inl_h */