Template help,To Alexandre Oliva

[Liu WS]

you can find such c++ code in VC++.
in VC++ include directory,the code of file uility

     1 // utility standard header
     2
     3 #if     _MSC_VER > 1000
     4 #pragma once
     5 #endif
....
....
     79 template<class _It>
     80         struct iterator_traits {
     81         typedef _It::iterator_category iterator_category;
     82         typedef _It::value_type value_type;
     83         typedef _It::distance_type distance_type;
     84         };


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