Added:
Added:

    bool ItemHandle::operator!() const;

so you can write code like:

    if ( !h )

rather than the annoying:

    if ( !h.getp() )

Note that is a hack fix.  The correct way to do this is by adding conversion-to-bool.  However, adding that causes ambiguities because whoever wrote ItemHandle added implicit conversion to T* which is wrong.  Removing implicit conversion to T*, however, breaks too much code; hence the hack fix. Approved: Matthias Brantner, Paul J. Lucas
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