reflection capabilities

dit8

i've got a class that has several QStrings as data member:
eg.
class myConst{
const QString first = "FIRST";
const QString second = "SECOND";
QList<QString > myConstList;
public:
myConst(){
myConstList << first << second ; ////wish I wouldn't have to do that
}
}

I wish that the "myConstList" will have all the data members of the class without being have to add them in the constructor.
Is there a way in QT to do something of that sort? (some sort of reflection of the class?)
I've tried going through the site for that and didn't find something like that..

SGaist

Hi and welcome to devnet,

Right out of the box ? Currently, no, you can't. Here's a little interesting article.

mrjj

Hi
It should be mentioned if your
QStrings data member were Qt properties you would be able
to enumerate them.
http://doc.qt.io/qt-5/properties.html

QObject *object = ...
const QMetaObject *metaobject = object->metaObject();
int count = metaobject->propertyCount();
for (int i=0; i<count; ++i) {
    QMetaProperty metaproperty = metaobject->property(i);
    const char *name = metaproperty.name();
    QVariant value = object->property(name);
    ...
}

Just as note :)

dit8

great that should do the trick!
(now I just need to get to know properties better to understand the implications of using it)

mrjj

@dit8 said in reflection capabilities:

implications

One that is important is that properties works using a tool called moc.exe so its not pure c++ anymore.
Also the class get married to Qt as it depends on the metasystem.
But for that you get easy way to save members ( more dynamically) . So the extend of the implications is based on
your actual use case.

kshegunov

@mrjj said in reflection capabilities:

Also the class get married to Qt

With members of type QString that marriage is iron-cast.