code: /**
   *   Copyright (c) Rich Hickey. All rights reserved.
   *   The use and distribution terms for this software are covered by the
   *   Eclipse Public License 1.0 (http://opensource.org/licenses/eclipse-1.0.php)
   *   which can be found in the file epl-v10.html at the root of this distribution.
   *   By using this software in any fashion, you are agreeing to be bound by
   * 	 the terms of this license.
   *   You must not remove this notice, or any other, from this software.
   **/
  
  /* rich Mar 25, 2006 11:01:29 AM */
  
  package clojure.lang;
  
  import java.io.Serializable;
  
  final public class Cons extends ASeq implements Serializable {
  
  private static final long serialVersionUID = 6682587018567831263L;
  
  private final Object _first;
  private final ISeq _more;
  
  public Cons(Object first, ISeq _more){
  	this._first = first;
  	this._more = _more;
  }
  
  
  public Cons(IPersistentMap meta, Object _first, ISeq _more){
  	super(meta);
  	this._first = _first;
  	this._more = _more;
  }
  
  public Object first(){
  	return _first;
  }
  
  public ISeq next(){
  	return more().seq();
  }
  
  public ISeq more(){
  	if(_more == null)
  		return PersistentList.EMPTY;
  	return _more;
  }
  
  public int count(){
  	return 1 + RT.count(_more);
  }
  
  public Cons withMeta(IPersistentMap meta){
  	if(meta() == meta)
  		return this;
  	return new Cons(meta, _first, _more);
  }
  }
  