By default that underlying type is deque , but a different type may be selected explicitly. The type of object stored in the queue. The type of the underlying container used to implement the queue. T is a model of Assignable . Sequence is a model of Front Insertion Sequence .
Sequence is a model of Back Insertion Sequence .
Public base classes None. The default constructor. Creates an empty queue . Assignable The copy constructor. Assignable The assignment operator.