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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);
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1 Answer

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


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