00001 00002 00003 /****************************************************************************** 00004 * 00005 * file: OptionalUnlabeledTracker.h 00006 * 00007 * Copyright (c) 2005, Michael E. Smoot . 00008 * All rights reverved. 00009 * 00010 * See the file COPYING in the top directory of this distribution for 00011 * more information. 00012 * 00013 * THE SOFTWARE IS PROVIDED _AS IS_, WITHOUT WARRANTY OF ANY KIND, EXPRESS 00014 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 00015 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 00016 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 00017 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 00018 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 00019 * DEALINGS IN THE SOFTWARE. 00020 * 00021 *****************************************************************************/ 00022 00023 00024 #ifndef TCLAP_OPTIONAL_UNLABELED_TRACKER_H 00025 #define TCLAP_OPTIONAL_UNLABELED_TRACKER_H 00026 00027 #include <string> 00028 00029 namespace TCLAP { 00030 00031 class OptionalUnlabeledTracker 00032 { 00033 00034 public: 00035 00036 static void check( bool req, const std::string& argName ); 00037 00038 static void gotOptional() { alreadyOptionalRef() = true; } 00039 00040 static bool& alreadyOptional() { return alreadyOptionalRef(); } 00041 00042 private: 00043 00044 static bool& alreadyOptionalRef() { static bool ct = false; return ct; } 00045 }; 00046 00047 00048 inline void OptionalUnlabeledTracker::check( bool req, const std::string& argName ) 00049 { 00050 if ( OptionalUnlabeledTracker::alreadyOptional() ) 00051 throw( SpecificationException( 00052 "You can't specify ANY Unlabeled Arg following an optional Unlabeled Arg", 00053 argName ) ); 00054 00055 if ( !req ) 00056 OptionalUnlabeledTracker::gotOptional(); 00057 } 00058 00059 00060 } // namespace TCLAP 00061 00062 #endif
