// -*- Mode: c++; c-basic-offset: 4; tab-width: 4; -*-

/****************************************************************************** 
 * 
 *  file:  VersionVisitor.h
 * 
 *  Copyright (c) 2003, Michael E. Smoot .
 *  All rights reserved.
 * 
 *  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_VERSION_VISITOR_H
#define TCLAP_VERSION_VISITOR_H

#include <tclap/CmdLineInterface.h>
#include <tclap/CmdLineOutput.h>
#include <tclap/Visitor.h>

namespace TCLAP
{

/**
 * A Visitor that will call the version method of the given CmdLineOutput
 * for the specified CmdLine object and then exit.
 */
class VersionVisitor: public Visitor
{
    private:
        /**
         * Prevent accidental copying
         */
        VersionVisitor(const VersionVisitor& rhs);
        VersionVisitor& operator=(const VersionVisitor& rhs);

    protected:

        /**
         * The CmdLine of interest.
         */
        CmdLineInterface* _cmd;

        /**
         * The output object. 
         */
        CmdLineOutput** _out;

    public:

        /**
         * Constructor.
         * \param cmd - The CmdLine the output is generated for. 
         * \param out - The type of output. 
         */
        VersionVisitor( CmdLineInterface* cmd, CmdLineOutput** out ) 
                : Visitor(), _cmd( cmd ), _out( out ) { }

        /**
         * Calls the version method of the output object using the
         * specified CmdLine.
         */
        void visit()
        { 
            (*_out)->version(*_cmd); 
            throw ExitException(0); 
        }

};

}

#endif
