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 ); 
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(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 | ||
 -
InputIt must meet the requirements of InputIterator.
 | 
||
[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)  | 
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|    adds elements to the end  (public member function)  | 
|