/usr/local/lib/swipl/library/occurs.pl
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  • swipl
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      • error.pl
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      • modules.pl -- Module utility predicates
      • occurs.pl -- Finding and counting sub-terms
        • contains_term/2
        • contains_var/2
        • free_of_term/2
        • free_of_var/2
        • occurrences_of_term/3
        • occurrences_of_var/3
        • sub_term/2
        • sub_var/2
        • sub_term_shared_variables/3
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 occurrences_of_var(@SubTerm, @Term, ?Count) is det
Count the number of SubTerms in Term that are equal to SubTerm. Equality is tested using ==/2. Can be used to count the occurrences of a particular variable in Term.
See also
- occurrences_of_term/3 for a unification (=/2) based variant.