
/******************************************************************************
 *
 *  file:  Visitor.h
 *
 *  Copyright (c) 2003, Michael E. Smoot .
 *  All rights reverved.
 *
 *  See the file COPYING in the top directory of this distribution for
 *  more information.
 *
 *  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.
 *
 *****************************************************************************/


#ifndef TCLAP_VISITOR_H
#define TCLAP_VISITOR_H

namespace TCLAP
{

/**
 * A base class that defines the interface for visitors.
 */
class Visitor
{
public:
  /**
   * Constructor. Does nothing.
   */
  Visitor() {}

  /**
   * Destructor. Does nothing.
   */
  virtual ~Visitor() {}

  /**
   * Does nothing. Should be overridden by child.
   */
  virtual void
  visit()
  {}
};

} // namespace TCLAP

#endif
