63 lines
1.7 KiB
C
63 lines
1.7 KiB
C
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/******************************************************************************
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*
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* file: OptionalUnlabeledTracker.h
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*
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* Copyright (c) 2005, Michael E. Smoot .
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* All rights reverved.
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*
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* See the file COPYING in the top directory of this distribution for
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* more information.
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*
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* THE SOFTWARE IS PROVIDED _AS IS_, WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*
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*****************************************************************************/
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#ifndef TCLAP_OPTIONAL_UNLABELED_TRACKER_H
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#define TCLAP_OPTIONAL_UNLABELED_TRACKER_H
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#include <string>
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namespace TCLAP {
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class OptionalUnlabeledTracker
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{
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public:
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static void check( bool req, const std::string& argName );
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static void gotOptional() { alreadyOptionalRef() = true; }
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static bool& alreadyOptional() { return alreadyOptionalRef(); }
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private:
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static bool& alreadyOptionalRef() { static bool ct = false; return ct; }
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};
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inline void OptionalUnlabeledTracker::check( bool req, const std::string& argName )
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{
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if ( OptionalUnlabeledTracker::alreadyOptional() )
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throw( SpecificationException(
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"You can't specify ANY Unlabeled Arg following an optional Unlabeled Arg",
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argName ) );
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if ( !req )
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OptionalUnlabeledTracker::gotOptional();
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}
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} // namespace TCLAP
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#endif
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