Question

I want to insert something into a STL list in C++, but I only have a reverse iterator. What is the usual way to accomplish this?

This works: (of course it does)

std::list<int> l; std::list<int>::iterator forward = l.begin(); l.insert(forward, 5); 

This doesn’t work: (what should I do instead?)

std::list<int> l; std::list<int>::reverse_iterator reverse = l.rbegin(); l.insert(reverse, 10); 

Answer 1

l.insert(reverse.base(), 10); will insert ’10’ at the end, given your definition of the ‘reverse’ iterator. Actually, l.rbegin().base() == l.end().