| package jp.ac.kobe_u.cs.prolog.builtin; |
| import jp.ac.kobe_u.cs.prolog.lang.*; |
| /** |
| * <code>'$get_current_B'/1</code><br> |
| * @author Mutsunori Banbara (banbara@kobe-u.ac.jp) |
| * @author Naoyuki Tamura (tamura@kobe-u.ac.jp) |
| * @version 1.0 |
| */ |
| class PRED_$get_current_B_1 extends Predicate { |
| Term arg1; |
| |
| public PRED_$get_current_B_1(Term a1, Predicate cont) { |
| arg1 = a1; |
| this.cont = cont; |
| } |
| |
| public PRED_$get_current_B_1() {} |
| |
| public void setArgument(Term[] args, Predicate cont){ |
| arg1 = args[0]; |
| this.cont = cont; |
| } |
| |
| public int arity() { return 1; } |
| |
| public String toString() { return "$get_current_B(" + arg1 + ")"; } |
| |
| public Predicate exec(Prolog engine) { |
| engine.setB0(); |
| Term a1; |
| a1 = arg1; |
| if (! a1.unify(new IntegerTerm(engine.stack.top()), engine.trail)) |
| return engine.fail(); |
| return cont; |
| } |
| } |