Following is the list of all member functions of the std::deque class in C++:

Deque Function	Description
size()	Returns the size of the deque, i.e., number of elements in the deque.
at()	Accesses an element at a given position, with bounds checking.
empty()	Checks if the deque is empty.
pop_back()	Deletes the last element of the deque.
pop_front()	Deletes the first element of the deque.
push_back()	Adds an element to the end of the deque.
push_front()	Adds an element to the front of the deque.
max_size()	Returns the maximum number of elements the deque can store at a time.
resize()	Changes the size of the deque.
crend()	Returns const_reverse_iterator to reverse end.
end()	Returns an iterator referring to the last element of the deque.
rend()	Returns the reverse iterator pointing to the element that precedes the first element of the deque.
cend()	Returns const_iterator to the last element.
crbegin()	Returns const_reverse_iterator to reverse beginning.
begin()	Returns an iterator referring to the deque’s first element.
rbegin()	Returns the reverse iterator pointing to the last element of the deque.
cbegin()	Returns the const_iterator to the first element.
back()	Accesses the element at the end of the deque.
front()	Accesses the element at the front of the deque.
clear()	Deletes all elements from the deque.
erase()	Removes elements from a specified position or range in the deque.
insert()	Inserts elements at the specified position in the deque.
assign()	Assigns new values to the elements of the deque.
swap()	Swaps the contents of one deque with another one.
emplace_front()	Constructs and adds an element at the front of the deque.
emplace()	Adds a new element just before the specified position.
emplace_back()	Constructs and adds an element at the end of the deque.