798bdbdf39
git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@399 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
40 lines
873 B
Prolog
40 lines
873 B
Prolog
/*************************************************************************
|
|
* *
|
|
* 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,
|
|
term_variables/2,
|
|
variant/2,
|
|
subsumes/2,
|
|
subsumes_chk/2,
|
|
cyclic_term/1,
|
|
acyclic_term/1,
|
|
variable_in_term/2
|
|
]).
|
|
|
|
term_hash(T,H) :-
|
|
term_hash(T, -1, 33554432, H).
|
|
|
|
subsumes_chk(X,Y) :-
|
|
\+ \+ subsumes(X,Y).
|
|
|
|
|
|
|
|
|
|
|