libstdc++
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A standard container automatically sorting its contents.
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 priority-based sorting and queue behavior. Very few of the standard container/sequence interface requirements are met (e.g., iterators).
The second template parameter defines the type of the underlying sequence/container. It defaults to std::vector, but it can be any type that supports front()
, push_back
, pop_back
, and random-access iterators, such as std::deque or an appropriate user-defined type.
The third template parameter supplies the means of making priority comparisons. It defaults to less<value_type>
but can be anything defining a strict weak ordering.
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 queue operations.
Definition at line 361 of file stl_queue.h.
std::priority_queue< _Tp, _Sequence, _Compare >::priority_queue | ( | const _Compare & | __x, |
const _Sequence & | __s | ||
) | [inline, explicit] |
Default constructor creates no elements.
Definition at line 396 of file stl_queue.h.
References std::make_heap().
std::priority_queue< _Tp, _Sequence, _Compare >::priority_queue | ( | _InputIterator | __first, |
_InputIterator | __last, | ||
const _Compare & | __x, | ||
const _Sequence & | __s | ||
) | [inline] |
Builds a queue from a range.
__first | An input iterator. |
__last | An input iterator. |
__x | A comparison functor describing a strict weak ordering. |
__s | An initial sequence with which to start. |
Begins by copying __s, inserting a copy of the elements from [first,last) into the copy of __s, then ordering the copy according to __x.
For more information on function objects, see the documentation on functor base classes.
Definition at line 436 of file stl_queue.h.
References std::make_heap().
bool std::priority_queue< _Tp, _Sequence, _Compare >::empty | ( | ) | const [inline] |
Returns true if the queue is empty.
Definition at line 462 of file stl_queue.h.
Referenced by __gnu_parallel::multiseq_partition(), and __gnu_parallel::multiseq_selection().
void std::priority_queue< _Tp, _Sequence, _Compare >::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.
Definition at line 525 of file stl_queue.h.
References std::pop_heap().
Referenced by __gnu_parallel::multiseq_partition(), and __gnu_parallel::multiseq_selection().
void std::priority_queue< _Tp, _Sequence, _Compare >::push | ( | const value_type & | __x | ) | [inline] |
Add data to the queue.
__x | Data to be added. |
This is a typical queue operation. The time complexity of the operation depends on the underlying sequence.
Definition at line 490 of file stl_queue.h.
References std::push_heap().
Referenced by __gnu_parallel::multiseq_partition(), and __gnu_parallel::multiseq_selection().
size_type std::priority_queue< _Tp, _Sequence, _Compare >::size | ( | ) | const [inline] |
Returns the number of elements in the queue.
Definition at line 467 of file stl_queue.h.
const_reference std::priority_queue< _Tp, _Sequence, _Compare >::top | ( | ) | const [inline] |
Returns a read-only (constant) reference to the data at the first element of the queue.
Definition at line 475 of file stl_queue.h.
Referenced by __gnu_parallel::multiseq_partition(), and __gnu_parallel::multiseq_selection().