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volleyballjerryFlag for United States of America

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Initializing Iterators

I have a piece of code converting from Microsoft Visual Studio 6 to 2008. When I compile the following under VS 2008:

	

// Declare the iterators that will hold the earliest requests and subrequests
// and initialize them to NULL
std::set<ShrPtr<Requests> >::const_iterator FirstRequest;
std::set<ShrPtr<SubRequests> >::const_iterator FirstSubRequest;
FirstRequest = NULL;
FirstSubRequest = NULL;

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I get the following compiler error --


Requests.cpp(443) : error C2679: binary '=' : no operator found which takes a right-hand operand of type 'int' (or there is no acceptable conversion)
        c:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\include\xtree(419): could be 'std::_Tree<_Traits>::const_iterator &std::_Tree<_Traits>::const_iterator::operator =(const std::_Tree<_Traits>::const_iterator &)'
        with
        [
            _Traits=std::_Tset_traits<ShrPtr<Request>,std::less<ShrPtr<Request>>,std::allocator<ShrPtr<Request>>,false>
        ]
        while trying to match the argument list '(std::_Tree<_Traits>::const_iterator, int)'
        with
        [
            _Traits=std::_Tset_traits<ShrPtr<Request>,std::less<ShrPtr<Request>>,std::allocator<ShrPtr<Request>>,false>
        ]

I actually agree with the compiler and I am surprised this compiled at all under Visual Studio 6. The question then becomes how to do this.
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jkr
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Excellent information and this was a huge help - thank you!