QList of QLists

Welcome!

I would like to ask if it is possible to create QList of QLists?
I've tried to do something like this:

Code:

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QList<QList<int> > myList;

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but it doesn't compile.

Please help!

I did something like that with some workaround. Just define a class, in that class define a qlist, and then define a qlist of that class. Works like charm

Can you show what compilation error you are getting ?

Try this

Code:

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QList<int> myIntList;
 
QList<myIntList> listOFIntList;

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QList<QList<int> > myList;

This works fine, the problem should be somewhere else. Have you added the include?

Code:

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typedef QList<YourType> TypeList; // Type definition
...
QList<TypeList> list; // Variable definition.

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Or, you could try this way (notice the spaces):

Code:

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QList< QList<YourType> > list;

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The first blank space is not needed, with the second is enough.

the second blank is important - if there is two consecutive '>', it is parsed as '>>', which is an operator

Hi!

Thanks for your replies. I don't know where the problem was but now everything works. I'm using that version:
QList<QList<int> > myList;

It seems only to work if there is a space between brackets.

This works:
QList<QList<int> > myList;
QList< QList<int> > myList;

This doesn't work:
QList<QList<int>> myList;

mirelon already explained this. you need a space between the two > characters, otherwise the >> is seen as operator>>().

I do believe, however, that with C++11 this is parsed correctly :)

Cheers,
_

Quote:

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I do believe, however, that with C++11 this is parsed correctly

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Exactly. For example, in gcc (4.7.x and above) you can add "-std=c++11" switch to enable it.

Quote:

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Originally Posted by stampede

Exactly. For example, in gcc (4.7.x and above) you can add "-std=c++11" switch to enable it.

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Or

Code:

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CONFIG += c++11

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to your project configuration file (in Qt5).