/usr/share/Yap/terms.yap is in yap 6.2.2-6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* *
* YAP Prolog *
* *
* Yap Prolog was developed at NCCUP - Universidade do Porto *
* *
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
* *
**************************************************************************
* *
* File: terms.yap *
* Last rev: 5/12/99 *
* mods: *
* comments: Term manipulation operations *
* *
*************************************************************************/
:- module(terms, [
term_hash/2,
term_hash/4,
instantiated_term_hash/4,
variant/2,
unifiable/3,
subsumes/2,
subsumes_chk/2,
cyclic_term/1,
variable_in_term/2,
variables_within_term/3,
new_variables_in_term/3
]).
term_hash(T,H) :-
term_hash(T, -1, 33554432, H).
%term_hash(X,Y) :-
% term_hash(X,-1,16'1000000,Y).
subsumes_chk(X,Y) :-
\+ \+ subsumes(X,Y).
unifiable(X,Y,Z) :-
protected_unifiable(X,Y,Z), !.
unifiable(_,_,_) :- fail.
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