// HTMLAllCollections are strange objects, they support both get and call.
static EncodedJSValue JSC_HOST_CALL callHTMLAllCollection(ExecState* exec)
{
    if (exec->argumentCount() < 1)
        return JSValue::encode(jsUndefined());

    // Do not use thisObj here. It can be the JSHTMLDocument, in the document.forms(i) case.
    JSHTMLAllCollection* jsCollection = jsCast<JSHTMLAllCollection*>(exec->callee());
    HTMLAllCollection& collection = jsCollection->impl();

    // Also, do we need the TypeError test here ?

    if (exec->argumentCount() == 1) {
        // Support for document.all(<index>) etc.
        String string = exec->argument(0).toString(exec)->value(exec);
        if (Optional<uint32_t> index = parseIndex(*string.impl()))
            return JSValue::encode(toJS(exec, jsCollection->globalObject(), collection.item(index.value())));

        // Support for document.images('<name>') etc.
        return JSValue::encode(namedItems(*exec, jsCollection, Identifier::fromString(exec, string)));
    }

    // The second arg, if set, is the index of the item we want
    String string = exec->argument(0).toString(exec)->value(exec);
    if (Optional<uint32_t> index = parseIndex(*exec->argument(1).toWTFString(exec).impl())) {
        if (auto* item = collection.namedItemWithIndex(string, index.value()))
            return JSValue::encode(toJS(exec, jsCollection->globalObject(), item));
    }

    return JSValue::encode(jsUndefined());
}
JSValue jsHTMLAllCollectionLength(ExecState* exec, JSValue slotBase, const Identifier&)
{
    JSHTMLAllCollection* castedThis = static_cast<JSHTMLAllCollection*>(asObject(slotBase));
    UNUSED_PARAM(exec);
    HTMLAllCollection* imp = static_cast<HTMLAllCollection*>(castedThis->impl());
    JSValue result = jsNumber(imp->length());
    return result;
}
EncodedJSValue JSC_HOST_CALL jsHTMLAllCollectionPrototypeFunctionTags(ExecState* exec)
{
    JSValue thisValue = exec->hostThisValue();
    if (!thisValue.inherits(&JSHTMLAllCollection::s_info))
        return throwVMTypeError(exec);
    JSHTMLAllCollection* castedThis = static_cast<JSHTMLAllCollection*>(asObject(thisValue));
    ASSERT_GC_OBJECT_INHERITS(castedThis, &JSHTMLAllCollection::s_info);
    HTMLAllCollection* imp = static_cast<HTMLAllCollection*>(castedThis->impl());
    const String& name(ustringToString(exec->argument(0).toString(exec)));
    if (exec->hadException())
        return JSValue::encode(jsUndefined());


    JSC::JSValue result = toJS(exec, castedThis->globalObject(), WTF::getPtr(imp->tags(name)));
    return JSValue::encode(result);
}
// HTMLAllCollections are strange objects, they support both get and call.
static EncodedJSValue JSC_HOST_CALL callHTMLAllCollection(ExecState* exec)
{
    if (exec->argumentCount() < 1)
        return JSValue::encode(jsUndefined());

    // Do not use thisObj here. It can be the JSHTMLDocument, in the document.forms(i) case.
    JSHTMLAllCollection* jsCollection = static_cast<JSHTMLAllCollection*>(exec->callee());
    HTMLAllCollection* collection = static_cast<HTMLAllCollection*>(jsCollection->impl());

    // Also, do we need the TypeError test here ?

    if (exec->argumentCount() == 1) {
        // Support for document.all(<index>) etc.
        bool ok;
        UString string = exec->argument(0).toString(exec);
        unsigned index = Identifier::toUInt32(string, ok);
        if (ok)
            return JSValue::encode(toJS(exec, jsCollection->globalObject(), collection->item(index)));

        // Support for document.images('<name>') etc.
        return JSValue::encode(getNamedItems(exec, jsCollection, Identifier(exec, string)));
    }

    // The second arg, if set, is the index of the item we want
    bool ok;
    UString string = exec->argument(0).toString(exec);
    unsigned index = Identifier::toUInt32(exec->argument(1).toString(exec), ok);
    if (ok) {
        AtomicString pstr = ustringToAtomicString(string);
        Node* node = collection->namedItem(pstr);
        while (node) {
            if (!index)
                return JSValue::encode(toJS(exec, jsCollection->globalObject(), node));
            node = collection->nextNamedItem(pstr);
            --index;
        }
    }

    return JSValue::encode(jsUndefined());
}
JSValue JSHTMLAllCollection::indexGetter(ExecState* exec, JSValue slotBase, unsigned index)
{
    JSHTMLAllCollection* thisObj = static_cast<JSHTMLAllCollection*>(asObject(slotBase));
    ASSERT_GC_OBJECT_INHERITS(thisObj, &s_info);
    return toJS(exec, thisObj->globalObject(), static_cast<HTMLAllCollection*>(thisObj->impl())->item(index));
}