content: /*******************************************************************************
   * Copyright (c) 2009-2011 Luaj.org. All rights reserved.
   *
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   * 
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   * THE SOFTWARE.
   ******************************************************************************/
  package org.luaj.vm2;
  
  /** 
   * Base class for representing numbers as lua values directly. 
   * <p>
   * The main subclasses are {@link LuaInteger} which holds values that fit in a java int, 
   * and {@link LuaDouble} which holds all other number values.
   * @see LuaInteger
   * @see LuaDouble
   * @see LuaValue
   * 
   */
  abstract
  public class LuaNumber extends LuaValue {
  
  	/** Shared static metatable for all number values represented in lua. */
  	public static LuaValue s_metatable;
  	
  	public int type() {
  		return TNUMBER;
  	}
  	
  	public String typename() {
  		return "number";
  	}
  	
  	public LuaNumber checknumber() {
  		return this; 
  	}
  	
  	public LuaNumber checknumber(String errmsg) {
  		return this; 
  	}
  	
  	public LuaNumber optnumber(LuaNumber defval) {
  		return this; 
  	}
  	
  	public LuaValue tonumber() {
  		return this;
  	}
  	
  	public boolean isnumber() {
  		return true;
  	}
  	
  	public boolean isstring() {
  		return true;
  	}
  	
  	public LuaValue getmetatable() { 
  		return s_metatable; 
  	}
  
  	public LuaValue concat(LuaValue rhs)      { return rhs.concatTo(this); }
  	public Buffer   concat(Buffer rhs)        { return rhs.concatTo(this); }
  	public LuaValue concatTo(LuaNumber lhs)   { return strvalue().concatTo(lhs.strvalue()); }
  	public LuaValue concatTo(LuaString lhs)   { return strvalue().concatTo(lhs); }
  
  }
  