std::stack(3)

NAME
std::stack - std::stack

Synopsis
   Defined in header <stack>
   template<
   class T,
   class Container = std::deque<T>
   > class stack;
   The std::stack class is a container adaptor that gives the programmer the
   functionality of a stack - specifically, a LIFO (last-in, first-out) data structure.
   The class template acts as a wrapper to the underlying container - only a specific
   set of functions is provided. The stack pushes and pops the element from the back of
   the underlying container, known as the top of the stack.

Template parameters
               The type of the stored elements.
   T - The behavior is undefined if T is not the same type as
               Container::value_type.
               (since C++17)
               The type of the underlying container to use to store the elements. The
               container must satisfy the requirements of SequenceContainer.
               Additionally, it must provide the following functions with the usual
               semantics:
                 * back()
   Container - * push_back()
                 * pop_back()
               The standard containers std::vector, std::deque and std::list satisfy
               these requirements. By default, if no container class is specified for a
               particular stack class instantiation, the standard container std::deque
               is used.

Member types
   Member type Definition
   container_type Container
   value_type Container::value_type
   size_type Container::size_type
   reference Container::reference
   const_reference Container::const_reference

Member functions
   constructor constructs the stack
                 (public member function)
   destructor destructs the stack
                 (public member function)
   operator= assigns values to the container adaptor
                 (public member function)

Element access
   top accesses the top element
                 (public member function)

Capacity
   empty checks whether the underlying container is empty
                 (public member function)
   size returns the number of elements
                 (public member function)

Modifiers
   push inserts element at the top
                 (public member function)
   emplace constructs element in-place at the top
   (C++11) (public member function)
   pop removes the top element
                 (public member function)
   swap swaps the contents
   (C++11) (public member function)

Member objects
   Container c the underlying container
                 (protected member object)

Non-member functions
   operator==
   operator!=
   operator<
   operator<= lexicographically compares the values in the stack
   operator> (function template)
   operator>=
   operator<=>
   (C++20)
   std::swap(std::stack) specializes the std::swap algorithm
   (C++11) (function template)

Helper classes
   std::uses_allocator<std::stack> specializes the std::uses_allocator type trait
   (C++11) (class template specialization)
  Deduction guides(since C++17)