public member function
bool empty() const noexcept;
Test whether container is empty
Returns whether the deque container is empty (i.e. whether its size is 0).
This function does not modify the container in any way. To clear the content of a deque container, see deque::clear.
true if the container size is 0, false otherwise.
The example initializes the content of the container to a sequence of numbers (form 1 to 10). It then pops the elements one by one until the container is empty and calculates their sum.
int main ()
int sum (0);
for (int i=1;i<=10;i++) mydeque.push_back(i);
sum += mydeque.front();
std::cout << "total: " << sum << '\n';
The container is accessed.
No contained elements are accessed: concurrently accessing or modifying them is safe.
No-throw guarantee: this member function never throws exceptions.