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/******************************************************************************
*
* file: OptionalUnlabeledTracker.h
*
* Copyright (c) 2005, 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_OPTIONAL_UNLABELED_TRACKER_H
#define TCLAP_OPTIONAL_UNLABELED_TRACKER_H
#include <string>
namespace TCLAP {
class OptionalUnlabeledTracker
{
public:
static void check( bool req, const std::string& argName );
static void gotOptional() { alreadyOptionalRef() = true; }
static bool& alreadyOptional() { return alreadyOptionalRef(); }
private:
static bool& alreadyOptionalRef() { static bool ct = false; return ct; }
};
void OptionalUnlabeledTracker::check( bool req, const std::string& argName )
{
if ( OptionalUnlabeledTracker::alreadyOptional() )
throw( SpecificationException(
"You can't specify ANY Unlabeled Arg following an optional Unlabeled Arg",
argName ) );
if ( !req )
OptionalUnlabeledTracker::gotOptional();
}
} // namespace TCLAP
#endif