[Qt-interest] QMap container issue

[Sajjad]

Hello forum,

I am trying to implement a graph data-structure using QMap<QString,int> and
QVector<Node*> .

QMap<> contains the node name and index of the QVector so that i can accesss
the Node* directly.

And i have the following function to retrieve the index for the vector to
retrieve the node


//////////////////////////////////////////////////////////////////////////


  int SceneHierarchy::getNodeIndex(const QString &nodeName) const

{

    int pos = -1;

     //find the node in the map with the key - node name

    QMap<QString,int>::const_iterator iter = m_nodeMap.constFind(nodeName);


     if(iter == m_nodeMap.constEnd())

    {

        //node name is not found in the map

        pos = -1;

    }

    else

    {

        //!node found inside the map and so we

        //!return the index of the node in the vector list

        pos = iter.value();

    }

     return pos;

}



////////////////////////////////////////////////////////////////////////////


The program crashes at the following line

    QMap<QString,int>::const_iterator iter = m_nodeMap.constFind(nodeName);



I do not get what could be the possible problem with the above code.
If the name is not found it will simply returns constEnd(), right?


I must be missing something. Anyone in the forum help to point it out?



Thanks

Sajjad
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