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Java > Open Source Codes > com > caucho > quercus > expr > MulExpr


1 /*
2  * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3  *
4  * This file is part of Resin(R) Open Source
5  *
6  * Each copy or derived work must preserve the copyright notice and this
7  * notice unmodified.
8  *
9  * Resin Open Source is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * Resin Open Source is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17  * of NON-INFRINGEMENT. See the GNU General Public License for more
18  * details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with Resin Open Source; if not, write to the
22  *
23  * Free Software Foundation, Inc.
24  * 59 Temple Place, Suite 330
25  * Boston, MA 02111-1307 USA
26  *
27  * @author Scott Ferguson
28  */
29
30 package com.caucho.quercus.expr;
31
32 import com.caucho.quercus.Location;
33 import com.caucho.quercus.env.Env;
34 import com.caucho.quercus.env.Value;
35
36 /**
37  * Represents a PHP multiplication expression.
38  */
39 public class MulExpr extends BinaryExpr {
40   public MulExpr(Location location, Expr left, Expr right)
41   {
42     super(location, left, right);
43   }
44
45   public MulExpr(Expr left, Expr right)
46   {
47     super(left, right);
48   }
49
50   /**
51    * Return true for a double value
52    */
53   public boolean isDouble()
54   {
55     return _left.isDouble() || _right.isDouble();
56   }
57
58   /**
59    * Return true for a long value
60    */
61   public boolean isLong()
62   {
63     return _left.isLong() && _right.isLong();
64   }
65
66   /**
67    * Return true for a number
68    */
69   public boolean isNumber()
70   {
71     return true;
72   }
73
74   /**
75    * Evaluates the expression.
76    *
77    * @param env the calling environment.
78    *
79    * @return the expression value.
80    */
81   public Value eval(Env env)
82   {
83     Value lValue = _left.eval(env);
84     Value rValue = _right.eval(env);
85
86     return lValue.mul(rValue);
87   }
88
89   public String JavaDoc toString()
90   {
91     return "(" + _left + " * " + _right + ")";
92   }
93 }
94
95
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