STL Container Adaptor Member Function Summary

C++ Reference Material
STL Container Adaptor Classes
Member Function Summary

assignment operator
`c1 = c2` Assigns one container adaptor to another like container adaptor (stack to stack, queue to queue, priority_queue to priority_queue).
testing for empty
`empty()` Returns `true` if container is empty, and otherwise `false`.
getting container size
`size()` Returns number of elements currently in container.
inserting a value
`push(val)` Adds an element to the container.
deleting a value
`pop()` Removes the appropriate element from the container (top element for a stack, front element for a queue, and highest-priority element for a priority queue).

queue-only member functions
`front()` Returns a [`const`] reference to the first element in a queue.
`back()` Returns a [`const`] reference to the last element in a queue.
stack-and-priority_queue-only member functions
`top()` Returns a [`const`] reference to the top element in a stack, or to the element with highest priority in a priority queue.
stack and priority_queue comparison operators
`==` Returns `true` if two like containers are equal (contain the same elements in the same order), and otherwise `false`.
`!=` Returns `true` if two like containers are not equal, and otherwise `false`.
`<` Returns `true` if first of two like containers is less than the second (in the lexicographic sense), and otherwise `false`.
`<=` Returns `true` if first of two like containers is less than or equal to the second (in the lexicographic sense), and otherwise `false`.
`>` Returns `true` if first of two like containers is greater than the second (in the lexicographic sense), and otherwise `false`.
`>=` Returns `true` if first of two like containers is greater than or equal to the second (in the lexicographic sense), and otherwise `false`.