| 1 | |
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| 2 | :- protocol(termp). |
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| 3 | |
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| 4 | |
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| 5 | :- info([ |
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| 6 | version is 1.0, |
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| 7 | authors is 'Paulo Moura', |
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| 8 | date is 2000/7/24, |
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| 9 | comment is 'Prolog terms protocol.']). |
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| 10 | |
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| 11 | |
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| 12 | :- public(ground/1). |
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| 13 | |
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| 14 | :- mode(ground(@term), zero_or_one). |
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| 15 | |
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| 16 | :- info(ground/1, [ |
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| 17 | comment is 'True if the argument is ground.', |
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| 18 | argnames is ['Term']]). |
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| 19 | |
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| 20 | |
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| 21 | :- public(new/1). |
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| 22 | |
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| 23 | :- mode(new(-nonvar), zero_or_one). |
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| 24 | |
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| 25 | :- info(new/1, [ |
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| 26 | comment is 'Creates a new term instance (if meaningful).', |
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| 27 | argnames is ['Term']]). |
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| 28 | |
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| 29 | |
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| 30 | :- public(occurs/2). |
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| 31 | |
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| 32 | :- mode(occurs(@var, @term), zero_or_one). |
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| 33 | |
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| 34 | :- info(occurs/2, [ |
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| 35 | comment is 'True if the variable occurs in the term.', |
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| 36 | argnames is ['Variable', 'Term']]). |
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| 37 | |
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| 38 | |
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| 39 | :- public(subsumes/2). |
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| 40 | |
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| 41 | :- mode(subsumes(@term, @term), zero_or_one). |
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| 42 | |
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| 43 | :- info(subsumes/2, [ |
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| 44 | comment is 'The first term subsumes the second term.', |
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| 45 | argnames is ['General', 'Specific']]). |
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| 46 | |
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| 47 | |
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| 48 | :- public(subterm/2). |
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| 49 | |
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| 50 | :- mode(subterm(?term, +term), zero_or_more). |
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| 51 | |
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| 52 | :- info(subterm/2, [ |
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| 53 | comment is 'The first term is a subterm of the second term.', |
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| 54 | argnames is ['Subterm', 'Term']]). |
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| 55 | |
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| 56 | |
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| 57 | :- public(valid/1). |
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| 58 | |
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| 59 | :- mode(valid(@nonvar), zero_or_one). |
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| 60 | |
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| 61 | :- info(valid/1, [ |
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| 62 | comment is 'Term is valid.', |
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| 63 | argnames is ['Term']]). |
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| 64 | |
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| 65 | |
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| 66 | :- public(vars/2). |
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| 67 | |
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| 68 | :- mode(vars(@term, -list), one). |
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| 69 | |
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| 70 | :- info(vars/2, [ |
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| 71 | comment is 'Returns a list of all term variables.', |
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| 72 | argnames is ['Term', 'List']]). |
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| 73 | |
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| 74 | |
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| 75 | :- end_protocol. |
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