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.. index:: queuep .. _queuep/0:
.. rst-class:: right
protocol
queuep
Queue protocol.
| Availability:
| logtalk_load(queues(loader))
| Author: Paulo Moura | Version: 1:3:0 | Date: 2020-12-09
| Compilation flags:
| static
| Dependencies: | (none)
| Remarks: | (none)
| Inherited public predicates: | (none)
.. contents:: :local: :backlinks: top
Public predicates
.. index:: empty/1 .. _queuep/0::empty/1:
empty/1 ^^^^^^^^^^^
True if the queue is empty.
| Compilation flags:
| static
| Template:
| empty(Queue)
| Mode and number of proofs:
| empty(@queue) - zero_or_one
.. index:: head/2 .. _queuep/0::head/2:
head/2 ^^^^^^^^^^
Unifies Head with the first element of the queue.
| Compilation flags:
| static
| Template:
| head(Queue,Head)
| Mode and number of proofs:
| head(+queue,?term) - zero_or_one
.. index:: join/3 .. _queuep/0::join/3:
join/3 ^^^^^^^^^^
Adds the new element at the end of the queue.
| Compilation flags:
| static
| Template:
| join(Element,Queue,NewQueue)
| Mode and number of proofs:
| join(@term,+queue,-queue) - zero_or_one
.. index:: join_all/3 .. _queuep/0::join_all/3:
join_all/3 ^^^^^^^^^^^^^^
Adds the new elements at the end of the queue. The elements are added in the same order that they appear in the list.
| Compilation flags:
| static
| Template:
| join_all(List,Queue,NewQueue)
| Mode and number of proofs:
| join_all(+list,+queue,-queue) - zero_or_one
.. index:: jump/3 .. _queuep/0::jump/3:
jump/3 ^^^^^^^^^^
Adds the new element at the front of the queue.
| Compilation flags:
| static
| Template:
| jump(Element,Queue,NewQueue)
| Mode and number of proofs:
| jump(@term,+queue,-queue) - zero_or_one
.. index:: jump_all/3 .. _queuep/0::jump_all/3:
jump_all/3 ^^^^^^^^^^^^^^
Adds the new elements at the front of the queue. The last element in the list will be at the front of the queue.
| Compilation flags:
| static
| Template:
| jump_all(Elements,Queue,NewQueue)
| Mode and number of proofs:
| jump_all(+list,+queue,-queue) - zero_or_one
.. index:: jump_all_block/3 .. _queuep/0::jump_all_block/3:
jump_all_block/3 ^^^^^^^^^^^^^^^^^^^^
Adds the new elements as a block at the front of the queue. The first element in the list will be at the front of the queue.
| Compilation flags:
| static
| Template:
| jump_all_block(Elements,Queue,NewQueue)
| Mode and number of proofs:
| jump_all_block(+list,+queue,-queue) - zero_or_one
.. index:: append/3 .. _queuep/0::append/3:
append/3 ^^^^^^^^^^^^
Appends two queues. The new queue will have the elements of the first queue followed by the elements of the second queue.
| Compilation flags:
| static
| Template:
| append(Queue1,Queue2,NewQueue)
| Mode and number of proofs:
| append(+queue,+queue,-queue) - one
.. index:: length/2 .. _queuep/0::length/2:
length/2 ^^^^^^^^^^^^
Queue length.
| Compilation flags:
| static
| Template:
| length(Queue,Length)
| Mode and number of proofs:
| length(+heap,?integer) - zero_or_one
.. index:: serve/3 .. _queuep/0::serve/3:
serve/3 ^^^^^^^^^^^
Removes the first element of the queue for service.
| Compilation flags:
| static
| Template:
| serve(Queue,Head,NewQueue)
| Mode and number of proofs:
| serve(+queue,?term,-queue) - zero_or_one
.. index:: as_list/2 .. _queuep/0::as_list/2:
as_list/2 ^^^^^^^^^^^^^
Converts a queue to a list.
| Compilation flags:
| static
| Template:
| as_list(Queue,List)
| Mode and number of proofs:
| as_list(+queue,-list) - one
.. index:: map/2 .. _queuep/0::map/2:
map/2 ^^^^^^^^^
Applies a closure to all elements of a queue.
| Compilation flags:
| static
| Template:
| map(Closure,Queue)
| Meta-predicate template:
| map(1,*)
| Mode and number of proofs:
| map(+callable,+queue) - zero_or_one
.. index:: map/3 .. _queuep/0::map/3:
map/3 ^^^^^^^^^
Applies a closure to all elements of a queue constructing a new queue.
| Compilation flags:
| static
| Template:
| map(Closure,Queue,NewQueue)
| Meta-predicate template:
| map(2,*,*)
| Mode and number of proofs:
| map(+callable,+queue,?queue) - zero_or_one
Protected predicates
(none)
Private predicates
(none)
Operators
(none)
.. seealso::
:ref:`queue <queue/0>`