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Pack logtalk -- logtalk-3.77.0/docs/_sources/queuep_0.rst.txt

.. 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>`