package jp.ac.kobe_u.cs.prolog.builtin;
import jp.ac.kobe_u.cs.prolog.lang.ListTerm;
import jp.ac.kobe_u.cs.prolog.lang.Predicate;
import jp.ac.kobe_u.cs.prolog.lang.Prolog;
import jp.ac.kobe_u.cs.prolog.lang.Term;
import jp.ac.kobe_u.cs.prolog.lang.VariableTerm;
/*
This file is generated by Prolog Cafe.
PLEASE DO NOT EDIT!
*/
/**
<code>'C'/3</code> defined in builtins.pl<br>
@author Mutsunori Banbara (banbara@kobe-u.ac.jp)
@author Naoyuki Tamura (tamura@kobe-u.ac.jp)
@version 1.0
*/
public class PRED_C_3 extends Predicate {
public Term arg1, arg2, arg3;
public PRED_C_3(Term a1, Term a2, Term a3, Predicate cont) {
arg1 = a1;
arg2 = a2;
arg3 = a3;
this.cont = cont;
}
public PRED_C_3(){}
public void setArgument(Term[] args, Predicate cont) {
arg1 = args[0];
arg2 = args[1];
arg3 = args[2];
this.cont = cont;
}
public int arity() { return 3; }
public String toString() {
return "C(" + arg1 + "," + arg2 + "," + arg3 + ")";
}
public Predicate exec(Prolog engine) {
// 'C'([A|B],A,B):-true
engine.setB0();
Term a1, a2, a3, a4, a5;
a1 = arg1;
a2 = arg2;
a3 = arg3;
// 'C'([A|B],A,B):-[]
a1 = a1.dereference();
if (a1.isList()){
Term[] args = {((ListTerm)a1).car(), ((ListTerm)a1).cdr()};
a4 = args[0];
a5 = args[1];
} else if (a1.isVariable()){
a4 = new VariableTerm(engine);
a5 = new VariableTerm(engine);
((VariableTerm) a1).bind(new ListTerm(a4, a5), engine.trail);
} else {
return engine.fail();
}
if (! a4.unify(a2, engine.trail))
return engine.fail();
if (! a5.unify(a3, engine.trail))
return engine.fail();
return cont;
}
}