std::queue< _Tp, _Sequence >(3cxx) std::queue< _Tp, _Sequence >(3cxx)
NAME
std::queue< _Tp, _Sequence > - A standard container giving FIFO
behavior.
SYNOPSIS
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> queue ()
Default constructor creates no elements.
queue (_Sequence &&__c)
template<typename _Alloc , typename _Requires = _Uses<_Alloc>> queue
(_Sequence &&__c, const _Alloc &__a)
template<typename _Alloc , typename _Requires = _Uses<_Alloc>> queue
(const _Alloc &__a)
queue (const _Sequence &__c)
template<typename _Alloc , typename _Requires = _Uses<_Alloc>> queue
(const _Sequence &__c, const _Alloc &__a)
template<typename _Alloc , typename _Requires = _Uses<_Alloc>> queue
(const queue &__q, const _Alloc &__a)
template<typename _Alloc , typename _Requires = _Uses<_Alloc>> queue
(queue &&__q, const _Alloc &__a)
reference back ()
const_reference back () const
template<typename... _Args> decltype(auto) emplace (_Args &&... __args)
bool empty () const
reference front ()
const_reference front () const
void pop ()
Removes first element.
void push (const value_type &__x)
Add data to the end of the queue.
void push (value_type &&__x)
size_type size () const
void swap (queue &__q) noexcept(__is_nothrow_swappable< _Sequence
>::value)
Protected Attributes
_Sequence c
c is the underlying container.
Friends
template<typename _Tp1 , typename _Seq1 > bool operator< (const queue<
_Tp1, _Seq1 > &, const queue< _Tp1, _Seq1 > &)
template<typename _Tp1 , typename _Seq1 > bool operator== (const queue<
_Tp1, _Seq1 > &, const queue< _Tp1, _Seq1 > &)
Detailed Description
template<typename _Tp, typename _Sequence = deque<_Tp>>
class std::queue< _Tp, _Sequence >" A standard container giving FIFO
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-first-out queue 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 front, back, push_back, and pop_front, such as std::list
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 and pop, which are
standard queue/FIFO 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::queue<
_Tp, _Sequence >::queue () [inline]
Default constructor creates no elements.
Member Function Documentation
template<typename _Tp , typename _Sequence = deque<_Tp>> reference
std::queue< _Tp, _Sequence >::back () [inline]
Returns a read/write reference to the data at the last element of the
queue.
template<typename _Tp , typename _Sequence = deque<_Tp>> const_reference
std::queue< _Tp, _Sequence >::back () const [inline]
Returns a read-only (constant) reference to the data at the last
element of the queue.
template<typename _Tp , typename _Sequence = deque<_Tp>> bool std::queue<
_Tp, _Sequence >::empty () const [inline]
Returns true if the queue is empty.
References std::queue< _Tp, _Sequence >::c.
template<typename _Tp , typename _Sequence = deque<_Tp>> reference
std::queue< _Tp, _Sequence >::front () [inline]
Returns a read/write reference to the data at the first element of the
queue.
template<typename _Tp , typename _Sequence = deque<_Tp>> const_reference
std::queue< _Tp, _Sequence >::front () const [inline]
Returns a read-only (constant) reference to the data at the first
element of the queue.
template<typename _Tp , typename _Sequence = deque<_Tp>> void std::queue<
_Tp, _Sequence >::pop () [inline]
Removes first element. This is a typical queue operation. It shrinks
the queue 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::queue<
_Tp, _Sequence >::push (const value_type & __x) [inline]
Add data to the end of the queue.
Parameters
__x Data to be added.
This is a typical queue operation. The function creates an element at
the end of the queue and assigns the given data to it. The time
complexity of the operation depends on the underlying sequence.
References std::queue< _Tp, _Sequence >::c.
template<typename _Tp , typename _Sequence = deque<_Tp>> size_type
std::queue< _Tp, _Sequence >::size () const [inline]
Returns the number of elements in the queue.
References std::queue< _Tp, _Sequence >::c.
Member Data Documentation
template<typename _Tp , typename _Sequence = deque<_Tp>> _Sequence
std::queue< _Tp, _Sequence >::c [protected]
c is the underlying container.
Referenced by std::queue< _Tp, _Sequence >::empty(), std::operator<(),
std::operator==(), std::queue< _Tp, _Sequence >::push(), and
std::queue< _Tp, _Sequence >::size().
Author
Generated automatically by Doxygen for libstdc++ from the source code.
libstdc++ Sat May 13 2std::queue< _Tp, _Sequence >(3cxx)
Generated by dwww version 1.14 on Thu Jan 23 20:14:47 CET 2025.