qt signal defined in macro

[TorAn]

I defined the signal in the macro:

#define PROP_SINGLEVAL(prpname) \
private: \
    int _##prpname; \
public: \
    int& prpname () {return _##prpname;}; \
    const int& ##prpname() const {return _##prpname;}; \
signals: \
    void on##prpname##Change();
 
class options : public QObject
{
    Q_OBJECT
public:
    options();
 
    PROP_SINGLEVAL(val)
};

#define PROP_SINGLEVAL(prpname) \
private: \
    int _##prpname; \
public: \
    int& prpname () {return _##prpname;}; \
    const int& ##prpname() const {return _##prpname;}; \
signals: \
    void on##prpname##Change();

class options : public QObject
{
    Q_OBJECT
public:
    options();

    PROP_SINGLEVAL(val)
};

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It compiles but, when trying to connect the signal to the slot of another object instance, the message is that the signal on options:nvalChange() does not exist. I think I understand the reason for it (moc preprocessing does not expand the macro). Perhaps there is a way to make it work? I have many variables and for each one I want to provide the signal when it is changing.
Thanks.

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Added after 7 minutes:

Can't find the way to delete the post, hence the answer: Q_SIGNAL

[wysota]

Why not use Q_PROPERTY with MEMBER and NOTIFY and let Qt do all the magic for you?