std::deque::insert
| iterator insert( iterator pos, const T& value ); iterator insert( const_iterator pos, const T& value ); | (1) | (until C++11) (since C++11) | 
| iterator insert( const_iterator pos, T&& value ); | (2) | (since C++11) | 
| void insert( iterator pos, size_type count, const T& value ); iterator insert( const_iterator pos, size_type count, const T& value ); | (3) | (until C++11) (since C++11) | 
| template< class InputIt > void insert( iterator pos, InputIt first, InputIt last); | (4) | (until C++11) (since C++11) | 
| iterator insert( const_iterator pos, std::initializer_list<T> ilist ); | (5) | (since C++11) | 
Inserts elements at specified position in the container.
value before the element pointed to by pos
count copies of the value before the element pointed to by pos
[first, last) before the element pointed to by pos. The behavior is undefined if first and last are iterators into *this.ilist.All iterators, including the past the end iterator, are invalidated. References are invalidated too, unless pos == begin() or pos == end(), in which case they are not invalidated.
| Contents | 
[edit] Parameters
| pos | - | element before which the content will be inserted | 
| value | - | element value to insert | 
| first, last | - | the range of elements to insert, can't be iterators into container for which insert is called | 
| ilist | - | initializer list to insert the values from | 
| Type requirements | ||
| - InputItmust meet the requirements ofInputIterator. | ||
[edit] Return value
1-2) iterator pointing to the inserted value
3) iterator pointing to the first element inserted, or pos if count==0.
4) iterator pointing to the first element inserted, or pos if first==last.
5) iterator pointing to the first element inserted, or pos if ilist is empty.
[edit] Complexity
1-2) Constant plus linear in the lesser of the distances between pos and either of the ends of the container.
3) Linear in count  plus linear in the lesser of the distances between pos and either of the ends of the container.
4) Linear in std::distance(first, last) plus linear in the lesser of the distances between pos and either of the ends of the container.
5) Linear in ilist.size() plus linear in the lesser of the distances between pos and either of the ends of the container.
[edit] See also
| (C++11) | constructs element in-place (public member function) | 
| inserts elements to the beginning (public member function) | |
| adds elements to the end (public member function) | |