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#include <iterator>
 
template<class T>
struct myiterator {
    typedef std::input_iterator_tag iterator_category;
    typedef T value_type;
    typedef T* pointer;
    typedef T& reference;
    typedef int difference_type;
};
 
namespace std {
    template<class Distance >
    template<class T> 
    void advance(myiterator <T>& it, Distance n )
    {std::cout << "succeed\n";}
}
 
int main() {
    myiterator<int> it;
    std::advance(it, 1);
}

prog.cpp:15:10: error: too many template-parameter-lists
In file included from /usr/include/c++/4.7/iterator:62:0,
                 from prog.cpp:1:
/usr/include/c++/4.7/bits/stl_iterator_base_funcs.h: In instantiation of ‘void std::__advance(_InputIterator&, _Distance, std::input_iterator_tag) [with _InputIterator = myiterator<int>; _Distance = int]’:
/usr/include/c++/4.7/bits/stl_iterator_base_funcs.h:176:7:   required from ‘void std::advance(_InputIterator&, _Distance) [with _InputIterator = myiterator<int>; _Distance = int]’
prog.cpp:21:23:   required from here
/usr/include/c++/4.7/bits/stl_iterator_base_funcs.h:128:2: error: no match for ‘operator++’ in ‘++__i’

Standard output is empty