////  BaseScriptEngine.h//  libraries/script-engine/src////  Created by Timothy Dedischew on 02/01/17.//  Copyright 2017 High Fidelity, Inc.////  Distributed under the Apache License, Version 2.0.//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html// #ifndef hifi_BaseScriptEngine_h#define hifi_BaseScriptEngine_h #include <functional>#include <QtCore/QDebug>#include <QtScript/QScriptEngine> #include "SettingHandle.h" // common base class for extending QScriptEngine itselfclass BaseScriptEngine : public QScriptEngine {    Q_OBJECTpublic:    static const QString SCRIPT_EXCEPTION_FORMAT;    static const QString SCRIPT_BACKTRACE_SEP;     BaseScriptEngine() {}     Q_INVOKABLE QScriptValue evaluateInClosure(const QScriptValue& locals, const QScriptProgram& program);     Q_INVOKABLE QScriptValue lintScript(const QString& sourceCode, const QString& fileName, const int lineNumber = 1);    Q_INVOKABLE QScriptValue makeError(const QScriptValue& other = QScriptValue(), const QString& type = "Error");    Q_INVOKABLE QString formatException(const QScriptValue& exception);    QScriptValue cloneUncaughtException(const QString& detail = QString()); signals:    void unhandledException(const QScriptValue& exception); protected:    void _emitUnhandledException(const QScriptValue& exception);    QScriptValue newLambdaFunction(std::function<QScriptValue(QScriptContext *context, QScriptEngine* engine)> operation, const QScriptValue& data = QScriptValue(), const QScriptEngine::ValueOwnership& ownership = QScriptEngine::AutoOwnership);     static const QString _SETTINGS_ENABLE_EXTENDED_EXCEPTIONS;    Setting::Handle<bool> _enableExtendedJSExceptions { _SETTINGS_ENABLE_EXTENDED_EXCEPTIONS, true };#ifdef DEBUG_JS    static void _debugDump(const QString& header, const QScriptValue& object, const QString& footer = QString());#endif}; // Lambda helps create callable QScriptValues out of std::functions:// (just meant for use from within the script engine itself)class Lambda : public QObject {    Q_OBJECTpublic:    Lambda(QScriptEngine *engine, std::function<QScriptValue(QScriptContext *context, QScriptEngine* engine)> operation, QScriptValue data);    ~Lambda();    public slots:        QScriptValue call();    QString toString() const;private:    QScriptEngine* engine;    std::function<QScriptValue(QScriptContext *context, QScriptEngine* engine)> operation;    QScriptValue data;}; #endif // hifi_BaseScriptEngine_h