////  ScriptValue.cpp//  libraries/script-engine/src////  Created by Heather Anderson on 9/2/21.//  Copyright 2021 Vircadia contributors.//  Copyright 2023 Overte e.V.////  Distributed under the Apache License, Version 2.0.//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html//  SPDX-License-Identifier: Apache-2.0// #include "ScriptValue.h" #include "ScriptEngineLogging.h" //V8TODO name is misleading, it's actually undefinedclass ScriptValueProxyNull final : public ScriptValueProxy {public:    virtual void release() override;    virtual ScriptValueProxy* copy() const override; public:    virtual ScriptValue call(const ScriptValue& thisObject = ScriptValue(), const ScriptValueList& args = ScriptValueList()) override;    virtual ScriptValue call(const ScriptValue& thisObject, const ScriptValue& arguments) override;    virtual ScriptValue construct(const ScriptValueList& args = ScriptValueList()) override;    virtual ScriptValue construct(const ScriptValue& arguments) override;    virtual ScriptValue data() const override;    virtual ScriptEnginePointer engine() const override;    virtual bool equals(const ScriptValue& other) const override;    virtual bool isArray() const override;    virtual bool isBool() const override;    virtual bool isError() const override;    virtual bool isFunction() const override;    virtual bool isNumber() const override;    virtual bool isNull() const override;    virtual bool isObject() const override;    virtual bool isString() const override;    virtual bool isUndefined() const override;    virtual bool isValid() const override;    virtual bool isVariant() const override;    virtual ScriptValueIteratorPointer newIterator() const override;    virtual ScriptValue property(const QString& name,                                 const ScriptValue::ResolveFlags& mode = ScriptValue::ResolvePrototype) const override;    virtual ScriptValue property(quint32 arrayIndex,                                 const ScriptValue::ResolveFlags& mode = ScriptValue::ResolvePrototype) const override;    virtual ScriptValue prototype() const override;    virtual void setData(const ScriptValue& val) override;    virtual bool hasProperty(const QString &name) const override;    virtual void setProperty(const QString& name,                             const ScriptValue& value,                             const ScriptValue::PropertyFlags& flags = ScriptValue::KeepExistingFlags) override;    virtual void setProperty(quint32 arrayIndex,                             const ScriptValue& value,                             const ScriptValue::PropertyFlags& flags = ScriptValue::KeepExistingFlags) override;    virtual void setPrototype(const ScriptValue& prototype) override;    virtual bool strictlyEquals(const ScriptValue& other) const override;    virtual QList<QString> getPropertyNames() const override;     virtual bool toBool() const override;    virtual qint32 toInt32() const override;    virtual double toInteger() const override;    virtual double toNumber() const override;    virtual QString toString() const override;    virtual quint16 toUInt16() const override;    virtual quint32 toUInt32() const override;    virtual QVariant toVariant() const override;    virtual QObject* toQObject() const override;}; static ScriptValueProxyNull SCRIPT_VALUE_NULL; ScriptValue::ScriptValue() : _proxy(&SCRIPT_VALUE_NULL) {} void ScriptValueProxyNull::release() {    // do nothing, we're a singlet} ScriptValueProxy* ScriptValueProxyNull::copy() const {    // return ourselves, we're a singlet    return const_cast <ScriptValueProxyNull*>(this);} ScriptValue ScriptValueProxyNull::call(const ScriptValue& thisObject, const ScriptValueList& args) {    Q_ASSERT(false);    qCWarning(scriptengine_script, "ScriptValue::call made to empty value");    return ScriptValue();} ScriptValue ScriptValueProxyNull::call(const ScriptValue& thisObject, const ScriptValue& arguments) {    Q_ASSERT(false);    qCWarning(scriptengine_script, "ScriptValue::call made to empty value");    return ScriptValue();} ScriptValue ScriptValueProxyNull::construct(const ScriptValueList& args) {    Q_ASSERT(false);    qCWarning(scriptengine_script, "ScriptValue::construct called on empty value");    return ScriptValue();} ScriptValue ScriptValueProxyNull::construct(const ScriptValue& arguments) {    Q_ASSERT(false);    qCWarning(scriptengine_script, "ScriptValue::construct called on empty value");    return ScriptValue();} ScriptValue ScriptValueProxyNull::data() const {    return ScriptValue();} ScriptEnginePointer ScriptValueProxyNull::engine() const {    Q_ASSERT(false);    qCWarning(scriptengine_script, "ScriptValue::engine called on empty value");    return ScriptEnginePointer();} bool ScriptValueProxyNull::equals(const ScriptValue& other) const {    return other.isUndefined();} bool ScriptValueProxyNull::isArray() const {    return false;} bool ScriptValueProxyNull::isBool() const {    return false;} bool ScriptValueProxyNull::isError() const {    return false;} bool ScriptValueProxyNull::isFunction() const {    return false;} bool ScriptValueProxyNull::isNumber() const {    return false;} bool ScriptValueProxyNull::isNull() const {    return false;} bool ScriptValueProxyNull::isObject() const {    return false;} bool ScriptValueProxyNull::isString() const {    return false;} bool ScriptValueProxyNull::isUndefined() const {    return true;} bool ScriptValueProxyNull::isValid() const {    return false;} bool ScriptValueProxyNull::isVariant() const {    return false;} ScriptValueIteratorPointer ScriptValueProxyNull::newIterator() const {    Q_ASSERT(false);    qCWarning(scriptengine_script, "ScriptValue::newIterator called on empty value");    return ScriptValueIteratorPointer();} ScriptValue ScriptValueProxyNull::property(const QString& name, const ScriptValue::ResolveFlags& mode) const {    return ScriptValue();} ScriptValue ScriptValueProxyNull::property(quint32 arrayIndex, const ScriptValue::ResolveFlags& mode) const {    return ScriptValue();} ScriptValue ScriptValueProxyNull::prototype() const {    return ScriptValue();} void ScriptValueProxyNull::setData(const ScriptValue& val) {    Q_ASSERT(false);    qCWarning(scriptengine_script, "ScriptValue::setData called on empty value");} bool ScriptValueProxyNull::hasProperty(const QString& name) const {    Q_ASSERT(false);    qCWarning(scriptengine_script, "ScriptValue::hasProperty called on empty value");    return false;}  void ScriptValueProxyNull::setProperty(const QString& name,                         const ScriptValue& value, const ScriptValue::PropertyFlags& flags) {    Q_ASSERT(false);    qCWarning(scriptengine_script, "ScriptValue::setProperty called on empty value");} void ScriptValueProxyNull::setProperty(quint32 arrayIndex,                         const ScriptValue& value, const ScriptValue::PropertyFlags& flags) {    Q_ASSERT(false);    qCWarning(scriptengine_script, "ScriptValue::setProperty called on empty value");} void ScriptValueProxyNull::setPrototype(const ScriptValue& prototype) {    Q_ASSERT(false);    qCWarning(scriptengine_script, "ScriptValue::setPrototype called on empty value");} bool ScriptValueProxyNull::strictlyEquals(const ScriptValue& other) const {    return !other.isValid();} QList<QString> ScriptValueProxyNull::getPropertyNames() const {    return QList<QString>();} bool ScriptValueProxyNull::toBool() const {    return false;} qint32 ScriptValueProxyNull::toInt32() const {    return 0;} double ScriptValueProxyNull::toInteger() const {    return 0;} double ScriptValueProxyNull::toNumber() const {    return 0;} QString ScriptValueProxyNull::toString() const {    return QString();} quint16 ScriptValueProxyNull::toUInt16() const {    return 0;} quint32 ScriptValueProxyNull::toUInt32() const {    return 0;} QVariant ScriptValueProxyNull::toVariant() const {    return QVariant();} QObject* ScriptValueProxyNull::toQObject() const {    return nullptr;}