std::list::pop_front
From cppreference.com
                    
                                        
                    
                    
                                                            
                    
|   void pop_front(); 
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Removes the first element of the container.
References and iterators to the erased element are invalidated.
Contents | 
[edit] Parameters
(none)
[edit] Return value
(none)
[edit] Complexity
Constant.
[edit] Exceptions
Does not throw.
[edit] See also
|    removes the last element   (public member function)  | 
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|    inserts elements to the beginning  (public member function)  |