将成员函数与 QScriptEngine::newFunction 一起使用

发布于 2024-09-03 10:00:49 字数 702 浏览 8 评论 0原文

让我们以一个简单的类为例：

QScriptEngine engine;

class MyClass {
public:
    QScriptValue foo(QScriptContext*, QScriptEngine*);
    MyClass();
};

QScriptValue MyClass:foo(QScriptContext* context, QScriptEngine* eng) {
    //something
}

MyClass::MyClass() {
    QScriptValue self = engine.newFunction(this->foo, 0);
    ....
}

上面的函数给了我一个错误： 没有匹配的函数来调用 'QScriptEngine::newFunction(, int)'

我尝试过使用 engine.newFunction(reinterpret_cast(foo), 0 ); 但这给了我一个错误，基本上表明编译器不知道名为 'FunctionSignature' 的关键字。

任何帮助表示赞赏。多谢。

问候，罗汉

原文

Let's take the case of a simple class:

QScriptEngine engine;

class MyClass {
public:
    QScriptValue foo(QScriptContext*, QScriptEngine*);
    MyClass();
};

QScriptValue MyClass:foo(QScriptContext* context, QScriptEngine* eng) {
    //something
}

MyClass::MyClass() {
    QScriptValue self = engine.newFunction(this->foo, 0);
    ....
}

The above function gives me an error:
no matching function for call to ‘QScriptEngine::newFunction(<unresolved overloaded function type>, int)’

I have tried using engine.newFunction(reinterpret_cast<FunctionSignature>(foo), 0); but this gives me an error which basically says that the compiler is not aware of a keyword called 'FunctionSignature'.

Any help is appreciated. Thanks a lot.

Regards,
rohan

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香草可樂 2024-09-10 10:00:49

查看官方示例代码，您应该执行以下操作：

MyClass::MyClass() {
    QScriptValue self = engine.newFunction(foo, 0);
    ....
}

编辑：好的，我进一步研究了参考文献。问题是，您尝试传递需要函数的方法。正如 @mosg 指出的，这是不可能的。要么将 foo 设为静态函数，要么在引用的线程中尝试解决方案。这意味着，您可以通过 engine.newQObject 创建一个新的 QObject。

Looking into the official example code, you should do something like this:

MyClass::MyClass() {
    QScriptValue self = engine.newFunction(foo, 0);
    ....
}

EDIT: OK, I looked into the reference a little bit more. The problem is, that you try to pass a method, where a function is needed. As @mosg pointed out, this isn't possible. Either you make foo a static function - or you try the solution in the referenced thread. This means, that you create a new QObject via engine.newQObject.

回复收藏 0 原文

请别遗忘我 2024-09-10 10:00:49

解决静态方法：

class MyClass {
public:
    static QScriptValue foo(QScriptContext*, QScriptEngine*);
    MyClass();
};

...

QScriptValue func = engine.newFunction(MyClass::foo)

Solution static method:

class MyClass {
public:
    static QScriptValue foo(QScriptContext*, QScriptEngine*);
    MyClass();
};

...

QScriptValue func = engine.newFunction(MyClass::foo)

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