30 lines
520 B
Plaintext
30 lines
520 B
Plaintext
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:- object(parsetree,
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implements(parsep)).
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parse(List, Tree) :-
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phrase(sentence(Tree), List).
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sentence(s(NP,VP)) --> noun_phrase(NP), verb_phrase(VP).
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noun_phrase(np(D,NP)) --> determiner(D), noun(NP).
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noun_phrase(NP) --> noun(NP).
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verb_phrase(vp(V)) --> verb(V).
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verb_phrase(vp(V,NP)) --> verb(V), noun_phrase(NP).
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determiner(d(the)) --> [the].
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determiner(d(a)) --> [a].
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noun(n(boy)) --> [boy].
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noun(n(girl)) --> [girl].
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verb(v(likes)) --> [likes].
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verb(v(hates)) --> [hates].
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:- end_object.
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