Need iterator when using ranged-based for loops

Question

Currently, I can only do ranged based loops with this:

for (auto& value : values)

But sometimes I need an iterator to the value, instea

Answer 1

I tried myself on this and found a solution.

Usage:

for(auto i : ForIterator(some_list)) {
    // i is the iterator, which was returned by some_list.begin()
    // might be useful for whatever reason
}

The implementation was not that difficult:

template  struct Iterator {
    T& list;
    typedef decltype(list.begin()) I;

    struct InnerIterator {
        I i;
        InnerIterator(I i) : i(i) {}
        I operator * () { return i; }
        I operator ++ () { return ++i; }
        bool operator != (const InnerIterator& o) { return i != o.i; }
    };

    Iterator(T& list) : list(list) {}
    InnerIterator begin() { return InnerIterator(list.begin()); }
    InnerIterator end() { return InnerIterator(list.end()); }
};
template  Iterator ForIterator(T& list) {
    return Iterator(list);
}