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 | Pack pha -- prolog/library/priorityq.pl |
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- pq_empty(?Q:pq(A)) is det
- Unifies Q with an empty queue.
- pq_peek(-P:prio, -X:A, +Q:pq(A)) is semidet
- Unify X with the item at the head of the queue if non-empty.
- pq_insert(+P:prio, +X:A, +Q1:pq(A), -Q2:pq(A)) is det
- Insert an item into a queue.
- pq_remove(-P:prio, -X:A, +Q1:pq(A), -Q2:pq(A)) is semidet
- Removes topmost value in the queue. Fails if queue empty.
- pq_size(+Q:pq(A), -N:natural) is det
- Unifies N with the number of items in the queue.