std::list::insert
From cppreference.com
                    
                                        
                    
                    
                                                            
                    
| 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.
1-2) inserts 
value before the element pointed to by pos
3) inserts 
count copies of the value before the element pointed to by pos
4) inserts elements from range 
[first, last) before the element pointed to by pos. The behavior is undefined if first and last are iterators into *this.
5) inserts elements from initializer list 
ilist.No iterators or references are 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.
3) Linear in count
4) Linear in std::distance(first, last)
5) Linear in ilist.size()
[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) | |