ThinkPHP/Library/Org/Util/PHPExcel/Cell.php

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<?php

/**
 *    PHPExcel_Cell
 *
 *    Copyright (c) 2006 - 2015 PHPExcel
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License as published by the Free Software Foundation; either
 *    version 2.1 of the License, or (at your option) any later version.
 *
 *    This library 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.  See the GNU
 *    Lesser General Public License for more details.
 *
 *    You should have received a copy of the GNU Lesser General Public
 *    License along with this library; if not, write to the Free Software
 *    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 *    @category    PHPExcel
 *    @package    PHPExcel_Cell
 *    @copyright    Copyright (c) 2006 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel)
 *    @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt    LGPL
 *    @version    ##VERSION##, ##DATE##
 */
class PHPExcel_Cell
{
    /**
     *  Default range variable constant
     *
     *  @var  string
     */
    const DEFAULT_RANGE = 'A1:A1';

    /**
     *    Value binder to use
     *
     *    @var    PHPExcel_Cell_IValueBinder
     */
    private static $valueBinder;

    /**
     *    Value of the cell
     *
     *    @var    mixed
     */
    private $value;

    /**
     *    Calculated value of the cell (used for caching)
     *    This returns the value last calculated by MS Excel or whichever spreadsheet program was used to
     *        create the original spreadsheet file.
     *    Note that this value is not guaranteed to reflect the actual calculated value because it is
     *        possible that auto-calculation was disabled in the original spreadsheet, and underlying data
     *        values used by the formula have changed since it was last calculated.
     *
     *    @var mixed
     */