Re: Why "Access Violent" throw when insert pair object into std::map

On Mar 1, 7:47 am, "Giovanni Dicanio" <giovanni.dica...@xxxxxxxxxxx>
wrote:
<phoenix8...@xxxxxxxxx> ha scritto nel messaggionews:afbb2802-ccee-46e7-8f9e-f2bea29a83a9@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

 bool InsertCell(int nSign, CDataCell& objNewCell);

I would use a const reference, like this:

  bool InsertCell( int nSign, const CDataCell & objNewCell )

{
 std::pair<std::map<int, CDataCell>::iterator, bool> ret =
   m_mapCellCollection.insert(std::map<int,
CDataCell>::value_type(nSign, objNewCell); //throw an error said
"0x000005, Access violent"

I don't like this long type declarations, IMHO they are not very readable.
I would prefer using typedef's to make things simpler and more readable,
like this:

class CADTNode
{
private:
...

    // ***  Map typedef ***
    typedef std::map< int, CDataCell > CellMapCollection;
    CellMapCollection m_mapCellCollection;
...

bool CADTNode::Insert( int nSign, const CDataCell & objNewCell )
{
     // *** Pair Typedef ***
     typedef std::pair< int, CDataCell > CellMapPair;

     // Insert into Map
     m_mapCellCollection.insert( CellMapPair( nSign, objNewCell ) );

     ...
 }

Giovanni

thank you for replying my object. but it's seemd that problem is still
problem.

i burn my head to think where the problem exist.


.

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