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- Library predicates
- library(aggregate)
- library(ansi_term)
- library(apply)
- library(assoc)
- library(broadcast)
- library(charsio)
- library(check)
- library(clpb)
- library(clpfd)
- library(clpqr)
- library(csv)
- library(dcgbasics)
- library(dcghighorder)
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- library(iostream)
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- library(main)
- library(occurs)
- library(option)
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- library(url)
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- library(thread)
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- library(yall)
- Library predicates
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- Packages
- Reference manual
F.2.29 library(occurs)
| contains_term/2 | Succeeds if Sub is contained in Term (=, deterministically). |
| contains_var/2 | Succeeds if Sub is contained in Term (==, deterministically). |
| free_of_term/2 | Succeeds of Sub does not unify to any subterm of Term. |
| free_of_var/2 | Succeeds
of Sub is not equal (==) to any subterm of Term. |
| occurrences_of_term/3 | Count the number of SubTerms in Term that _unify_ with SubTerm. |
| occurrences_of_var/3 | Count the number of SubTerms in Term that are _equal_ to SubTerm. |
| sub_term/2 | Generates (on backtracking) all subterms of Term. |
| sub_term_shared_variables/3 | If Sub is a sub term of Term, Vars is bound to the list of variables in Sub that also appear outside Sub in Term. |
| sub_var/2 | Generates
(on backtracking) all subterms (==) of Term. |