class template
<stack>

std::stack

template <class T, class Container = deque<T> > class stack;
LIFO stack
Stacks are a type of container adaptor, specifically designed to operate in a LIFO context (last-in first-out), where elements are inserted and extracted only from one end of the container.

stacks are implemented as containers adaptors, which are classes that use an encapsulated object of a specific container class as its underlying container, providing a specific set of member functions to access its elements. Elements are pushed/popped from the "back" of the specific container, which is known as the top of the stack.

The underlying container may be any of the standard container class templates or some other specifically designed container class. The container shall support the following operations:
  • empty
  • size
  • back
  • push_back
  • pop_back

The standard container classes vector, deque and list fulfill these requirements. By default, if no container class is specified for a particular stack class instantiation, the standard container deque is used.

Template parameters

T
Type of the elements.
Aliased as member type stack::value_type.
Container
Type of the internal underlying container object where the elements are stored.
Its value_type shall be T.
Aliased as member type stack::container_type.

Member types

member typedefinitionnotes
value_typeThe first template parameter (T)Type of the elements
container_typeThe second template parameter (Container)Type of the underlying container
size_typean unsigned integral typeusually the same as size_t
member typedefinitionnotes
value_typeThe first template parameter (T)Type of the elements
container_typeThe second template parameter (Container)Type of the underlying container
referencecontainer_type::referenceusually, value_type&
const_referencecontainer_type::const_referenceusually, const value_type&
size_typean unsigned integral typeusually, the same as size_t

Member functions


Non-member function overloads


Non-member class specializations

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