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// PR c++/17132

template 

struct has_deref

{

    struct impl

    {

        template <

            typename Type,

            typename Type::reference (Type::*Func)(void) const>

        struct func_tag;

        template 

        static char (& test(

            Type *,

            func_tag * = 0

        ))[2];

        static char test(void *);

    };

    static const bool value = (sizeof(impl::test((T *) 0)) == 2);

};

template 

struct container

{

    struct iterator

    {

        typedef T & reference;

        reference operator*() const;

    };

};

int main()

{

    typedef container::iterator iter;

    int result = has_deref::value;

    return result;

}