CODEWITHSUNDEEP
c++qtinitializer-listqabstractitemmodel
Nicolas Holthaus
Nicolas Holthaus

Reputation: 8293

QVector<int> with initializer list fails with 3 items

In a custom item model, I want to call data changed with some given roles.

With 2 items in the initializer-list, it compiles just fine:

emit dataChanged(index, index, QVector<int>{ Qt::CheckStateRole, Qt::DisplayRole });

However, when I add a third item to the list it fails:

emit dataChanged(index, index, QVector<int> { Qt::CheckStateRole, Qt::DisplayRole, Qt::DecorationRole });

error C2440: '<function-style-cast>' : cannot convert from 'initializer-list' to 'QVector<int>' 
2>          No constructor could take the source type, or constructor overload resolution was ambiguous

It doesn't seem to matter what the roles are, any two will compile and the third will not. I'm using MSVC2013 and Qt 5.4.1. Am I doing something wrong here?

Upvotes: 3

Views: 903

Answers (1)

huysentruitw
huysentruitw

Reputation: 28151

If you haven't already, I would update your VS2013 to Update 5. Especially, in Update 4 they have fixed some issues with initializer lists. Also see this QTBUG-39142

It seems like your compiler is trying to construct a QVector object using the normal constructors. You could also verify that you have C++11 enabled and Q_COMPILER_INITIALIZER_LISTS is defined.

Upvotes: 4

Related Questions