/*
* Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Resin Open Source is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.quercus.expr;
import com.caucho.quercus.Location;
import com.caucho.quercus.env.Env;
import com.caucho.quercus.env.Value;
/**
* Represents a PHP subtract expression.
*/
public class SubExpr extends BinaryExpr {
protected SubExpr(Location location, Expr left, Expr right)
{
super(location, left, right);
}
protected SubExpr(Expr left, Expr right)
{
super(left, right);
}
/**
* Evaluates the expression returning the expression value.
*
* @param env the quercus environment
* @return the resulting value
*/
public Value eval(Env env)
{
Value lValue = _left.eval(env);
Value rValue = _right.eval(env);
return lValue.sub(rValue);
}
public String toString()
{
return "(" + _left + " + " + _right + ")";
}
}