std::stack< _Tp, _Sequence >(3)

NAME
std::stack< _Tp, _Sequence > - A standard container giving FILO behavior.

SYNOPSIS

#include <stack>

  Public Types
typedef _Sequence::const_reference const_reference
typedef _Sequence container_type
typedef _Sequence::reference reference
typedef _Sequence::size_type size_type
typedef _Sequence::value_type value_type

  Public Member Functions
template<typename _Seq = _Sequence, typename _Requires = typename enable_if<is_default_constructible<_Seq>::value>::type> stack ()
Default constructor creates no elements.
stack (_Sequence &&__c)
template<typename _Alloc, typename _Requires = _Uses<_Alloc>> stack (_Sequence &&__c, const _Alloc &__a)
template<typename _Alloc, typename _Requires = _Uses<_Alloc>> stack (const _Alloc &__a)
stack (const _Sequence &__c)
template<typename _Alloc, typename _Requires = _Uses<_Alloc>> stack (const _Sequence &__c, const _Alloc &__a)
template<typename _Alloc, typename _Requires = _Uses<_Alloc>> stack (const stack &__q, const _Alloc &__a)
template<typename _Alloc, typename _Requires = _Uses<_Alloc>> stack (stack &&__q, const _Alloc &__a)
template<typename... _Args> decltype(auto) emplace (_Args &&... __args)
bool empty () const
void pop ()
Removes first element.
void push (const value_type &__x)
Add data to the top of the stack.
void push (value_type &&__x)
size_type size () const
void swap (stack &__s) noexcept(__is_nothrow_swappable< _Sequence >::value)
reference top ()
const_reference top () const

  Protected Attributes
_Sequence c

  Friends
template<typename _Tp1, typename _Seq1> bool operator< (const stack< _Tp1, _Seq1 > &, const stack< _Tp1, _Seq1 > &)
template<typename _Tp1, three_way_comparable _Seq1> compare_three_way_result_t< _Seq1 > operator<=> (const stack< _Tp1, _Seq1 > &, const stack< _Tp1, _Seq1 > &)
template<typename _Tp1, typename _Seq1> bool operator== (const stack< _Tp1, _Seq1 > &, const stack< _Tp1, _Seq1 > &)

Detailed Description

  template<typename _Tp, typename _Sequence = deque<_Tp>>
class std::stack< _Tp, _Sequence >"A standard container giving FILO behavior.

Template Parameters
    _Tp Type of element.
    _Sequence Type of underlying sequence, defaults to deque<_Tp>.

Meets many of the requirements of a container, but does not define anything to do with iterators. Very few of the other standard container interfaces are defined.

This is not a true container, but an adaptor. It holds another container, and provides a wrapper interface to that container. The wrapper is what enforces strict first-in-last-out stack behavior.

The second template parameter defines the type of the underlying sequence/container. It defaults to std::deque, but it can be any type that supports back, push_back, and pop_back, such as std::list, std::vector, or an appropriate user-defined type.

Members not found in normal containers are container_type, which is a typedef for the second Sequence parameter, and push, pop, and top, which are standard stack/FILO operations.

Constructor & Destructor Documentation

  template<typename _Tp, typename _Sequence = deque<_Tp>> template<typename _Seq = _Sequence, typename _Requires = typename enable_if<is_default_constructible<_Seq>::value>::type> std::stack< _Tp, _Sequence >::stack () [inline]

Default constructor creates no elements.

Member Function Documentation

  template<typename _Tp, typename _Sequence = deque<_Tp>> bool std::stack< _Tp, _Sequence >::empty () const [inline], [nodiscard]
Returns true if the stack is empty.

  template<typename _Tp, typename _Sequence = deque<_Tp>> void std::stack< _Tp, _Sequence >::pop () [inline]

Removes first element. This is a typical stack operation. It shrinks the stack by one. The time complexity of the operation depends on the underlying sequence.

Note that no data is returned, and if the first element's data is needed, it should be retrieved before pop() is called.

  template<typename _Tp, typename _Sequence = deque<_Tp>> void std::stack< _Tp, _Sequence >::push (const value_type & __x) [inline]

Add data to the top of the stack.

Parameters
    __x Data to be added.

This is a typical stack operation. The function creates an element at the top of the stack and assigns the given data to it. The time complexity of the operation depends on the underlying sequence.

  template<typename _Tp, typename _Sequence = deque<_Tp>> size_type std::stack< _Tp, _Sequence >::size () const [inline], [nodiscard]
Returns the number of elements in the stack.

  template<typename _Tp, typename _Sequence = deque<_Tp>> reference std::stack< _Tp, _Sequence >::top () [inline], [nodiscard]
Returns a read/write reference to the data at the first element of the stack.

  template<typename _Tp, typename _Sequence = deque<_Tp>> const_reference std::stack< _Tp, _Sequence >::top () const [inline], [nodiscard]
Returns a read-only (constant) reference to the data at the first element of the stack.

Author

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