Unfortunately std::queue
‘adapts’ the function known as push_back
to just push
which means that the standard back_insert_iterator
doesn’t work.
Probably the simplest way (albeit conceptually ugly) is to adapt the container adapter with a short lived container adapter adapter[sic] (eugh!) that lives as long as the back insert iterator.
template<class T>
class QueueAdapter
{
public:
QueueAdapter(std::queue<T>& q) : _q(q) {}
void push_back(const T& t) { _q.push(t); }
private:
std::queue<T>& _q;
};
Used like this:
std::queue<int> qi;
QueueAdapter< std::queue<int> > qiqa( qi );
std::copy( v.begin(), v.end(), std::back_inserter( qiqa ) );