| 1 | |
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| 2 | :- category(proto_hierarchy, |
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| 3 | implements(proto_hierarchyp)). |
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| 4 | |
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| 5 | :- info([ |
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| 6 | version is 1.1, |
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| 7 | author is 'Paulo Moura', |
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| 8 | date is 2006/2/20, |
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| 9 | comment is 'Prototype hierarchy predicates.']). |
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| 10 | |
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| 11 | parent(Parent) :- |
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| 12 | self(Self), |
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| 13 | extends_object(Self, Parent). |
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| 14 | |
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| 15 | parents(Parents) :- |
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| 16 | self(Self), |
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| 17 | findall(Parent, extends_object(Self, Parent), Parents). |
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| 18 | |
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| 19 | ancestor(Ancestor) :- |
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| 20 | self(Self), |
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| 21 | ancestor(Self, Ancestor). |
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| 22 | |
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| 23 | ancestor(Self, Ancestor) :- |
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| 24 | extends_object(Self, Ancestor). |
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| 25 | ancestor(Self, Ancestor) :- |
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| 26 | extends_object(Self, Parent), |
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| 27 | ancestor(Parent, Ancestor). |
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| 28 | |
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| 29 | ancestors(Ancestors) :- |
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| 30 | self(Self), |
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| 31 | findall(Ancestor, ancestor(Self, Ancestor), Ancestors). |
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| 32 | |
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| 33 | extension(Prototype) :- |
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| 34 | self(Self), |
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| 35 | extends_object(Prototype, Self). |
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| 36 | |
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| 37 | extensions(Prototypes) :- |
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| 38 | self(Self), |
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| 39 | findall(Prototype, extends_object(Prototype, Self), Prototypes). |
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| 40 | |
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| 41 | leaf(Leaf) :- |
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| 42 | self(Self), |
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| 43 | leaf(Self, Leaf). |
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| 44 | |
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| 45 | leaf(Self, Leaf) :- |
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| 46 | extends_object(Leaf, Self), |
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| 47 | \+ extends_object(_, Leaf). |
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| 48 | leaf(Self, Leaf) :- |
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| 49 | extends_object(Object, Self), |
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| 50 | leaf(Object, Leaf). |
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| 51 | |
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| 52 | leaves(Leaves) :- |
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| 53 | self(Self), |
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| 54 | ( setof(Leaf, leaf(Self, Leaf), Leaves) -> |
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| 55 | true |
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| 56 | ; Leaves = [] |
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| 57 | ). |
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| 58 | |
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| 59 | descendant(Descendant) :- |
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| 60 | self(Self), |
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| 61 | descendant(Self, Descendant). |
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| 62 | |
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| 63 | descendant(Self, Descendant) :- |
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| 64 | extends_object(Descendant, Self). |
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| 65 | descendant(Self, Descendant) :- |
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| 66 | extends_object(Descendant, Self), |
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| 67 | \+ extends_object(Descendant, Self). |
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| 68 | descendant(Self, Descendant) :- |
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| 69 | extends_object(Subclass, Self), |
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| 70 | descendant(Subclass, Descendant). |
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| 71 | |
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| 72 | descendants(Descendants) :- |
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| 73 | self(Self), |
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| 74 | ( setof(Descendant, descendant(Self, Descendant), Descendants) -> |
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| 75 | true |
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| 76 | ; Descendants = [] |
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| 77 | ). |
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| 78 | |
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| 79 | :- end_category. |
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