std::insert_iterator - cppreference.com (original) (raw)
| Defined in header | | | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | ------------- | | template< class Container > class insert_iterator : public std::iterator<std::output_iterator_tag, void, void, void, void> | | (until C++17) | | template< class Container > class insert_iterator; | | (since C++17) |
std::insert_iterator is a LegacyOutputIterator that inserts elements into a container for which it was constructed, at the position pointed to by the supplied iterator. The container's insert() member function is called whenever the iterator (whether dereferenced or not) is assigned to. Incrementing the std::insert_iterator is a no-op.
[edit] Member types
| Member type | Definition |
|---|---|
| iterator_category | std::output_iterator_tag |
| value_type | void |
| difference_type | |
| pointer | void |
| reference | void |
| container_type | Container |
| Member types iterator_category, value_type, difference_type, pointer and reference are required to be obtained by inheriting from std::iterator<std::output_iterator_tag, void, void, void, void>. | (until C++17) |
|---|
[edit] Member functions
[edit] Member objects
| Member name | Definition |
|---|---|
| container (protected member object) | a pointer of type Container* |
| iter (protected member object) | an iterator of type Container::iterator(until C++20) ranges::iterator_t(since C++20) |
[edit] Example
#include #include #include #include #include int main() { std::vector v{1, 2, 3, 4, 5}; std::list l{-1, -2, -3}; std::copy(v.begin(), v.end(), // may be simplified with std::inserter std::insert_iterator<std::list>(l, std::next(l.begin()))); for (int n : l) std::cout << n << ' '; std::cout << '\n'; }
Output: