本文整理汇总了C++中MutableHandle::setUndefined方法的典型用法代码示例。如果您正苦于以下问题：C++ MutableHandle::setUndefined方法的具体用法？C++ MutableHandle::setUndefined怎么用？C++ MutableHandle::setUndefined使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类MutableHandle的用法示例。
在下文中一共展示了MutableHandle::setUndefined方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: rootDesc
bool
js::GetProperty(JSContext *cx, Handle<ObjectImpl*> obj, Handle<ObjectImpl*> receiver,
Handle<PropertyId> pid, unsigned resolveFlags, MutableHandle<Value> vp)
{
NEW_OBJECT_REPRESENTATION_ONLY();
MOZ_ASSERT(receiver);
Rooted<ObjectImpl*> current(cx, obj);
do {
MOZ_ASSERT(obj);
if (Downcast(current)->isProxy()) {
MOZ_NOT_REACHED("NYI: proxy [[GetP]]");
return false;
}
PropDesc desc;
PropDesc::AutoRooter rootDesc(cx, &desc);
if (!GetOwnProperty(cx, current, pid, resolveFlags, &desc))
return false;
/* No property? Recur or bottom out. */
if (desc.isUndefined()) {
current = current->getProto();
if (current)
continue;
vp.setUndefined();
return true;
}
/* If it's a data property, return the value. */
if (desc.isDataDescriptor()) {
vp.set(desc.value());
return true;
}
/* If it's an accessor property, call its [[Get]] with the receiver. */
if (desc.isAccessorDescriptor()) {
Rooted<Value> get(cx, desc.getterValue());
if (get.isUndefined()) {
vp.setUndefined();
return true;
}
InvokeArgsGuard args;
if (!cx->stack.pushInvokeArgs(cx, 0, &args))
return false;
args.setCallee(get);
args.setThis(ObjectValue(*receiver));
bool ok = Invoke(cx, args);
vp.set(args.rval());
return ok;
}
/* Otherwise it's a PropertyOp-based property. XXX handle this! */
MOZ_NOT_REACHED("NYI: handle PropertyOp'd properties here");
return false;
} while (false);
MOZ_NOT_REACHED("buggy control flow");
return false;
}