| 1 | |
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| 2 | :- protocol(queuep). |
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| 3 | |
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| 4 | :- info([ |
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| 5 | version is 1.0, |
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| 6 | author is 'Paulo Moura', |
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| 7 | date is 2000/7/24, |
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| 8 | comment is 'Queue protocol.']). |
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| 9 | |
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| 10 | :- public(empty/1). |
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| 11 | :- mode(empty(@queue), zero_or_one). |
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| 12 | :- info(empty/1, [ |
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| 13 | comment is 'True if the queue is empty.', |
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| 14 | argnames is ['Queue']]). |
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| 15 | |
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| 16 | :- public(head/2). |
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| 17 | :- mode(head(+queue, ?term), zero_or_one). |
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| 18 | :- info(head/2, [ |
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| 19 | comment is 'Unifies Head with the first element of the queue.', |
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| 20 | argnames is ['Queue', 'Head']]). |
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| 21 | |
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| 22 | :- public(join/3). |
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| 23 | :- mode(join(@term, +queue, -queue), zero_or_one). |
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| 24 | :- info(join/3, [ |
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| 25 | comment is 'Adds the new element at the end of the queue.', |
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| 26 | argnames is ['Element', 'Queue_in', 'Queue_out']]). |
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| 27 | |
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| 28 | :- public(join_all/3). |
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| 29 | :- mode(join_all(+list, +queue, -queue), zero_or_one). |
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| 30 | :- info(join_all/3, [ |
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| 31 | comment is 'Adds the new elements at the end of the queue. The elements are added in the same order that they appear in the list.', |
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| 32 | argnames is ['List', 'Queue_in', 'Queue_out']]). |
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| 33 | |
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| 34 | :- public(jump/3). |
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| 35 | :- mode(jump(@term, +queue, -queue), zero_or_one). |
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| 36 | :- info(jump/3, [ |
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| 37 | comment is 'Adds the new element at the front of the queue.', |
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| 38 | argnames is ['Element', 'Queue_in', 'Queue_out']]). |
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| 39 | |
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| 40 | :- public(jump_all/3). |
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| 41 | :- mode(jump_all(+list, +queue, -queue), zero_or_one). |
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| 42 | :- info(jump_all/3, [ |
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| 43 | comment is 'Adds the new elements at the front of the queue. The elements are added in the same order that they appear in the list.', |
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| 44 | argnames is ['Element', 'Queue_in', 'Queue_out']]). |
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| 45 | |
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| 46 | :- public(length/2). |
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| 47 | :- mode(length(+queue, ?integer), zero_or_one). |
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| 48 | :- info(length/2, |
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| 49 | [comment is 'Queue length.', |
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| 50 | argnames is ['Queue', 'Length']]). |
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| 51 | |
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| 52 | :- public(serve/3). |
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| 53 | :- mode(serve(+queue, ?term, -queue), zero_or_one). |
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| 54 | :- info(serve/3, [ |
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| 55 | comment is 'Removes the first element of the queue for service.', |
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| 56 | argnames is ['Queue_in', 'Head', 'Queue_out']]). |
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| 57 | |
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| 58 | :- public(as_list/2). |
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| 59 | :- mode(as_list(+queue, -list), one). |
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| 60 | :- info(as_list/2, |
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| 61 | [comment is 'Converts a queue to a list.', |
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| 62 | argnames is ['Queue', 'List']]). |
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| 63 | |
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| 64 | :- end_protocol. |
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