package luan.impl;

import luan.Luan;
import luan.LuanException;
import luan.LuanElement;


final class NotExpr extends UnaryOpExpr {

	NotExpr(LuanElement el,Expr op) {
		super(el,op);
	}

	@Override public Object eval(LuanStateImpl luan) throws LuanException {
		return !luan.checkBoolean( op.eval(luan), op.el() );
	}

	@Override public String toString() {
		return "(NotExpr "+op+")";
	}
}