WCudaMSE/Tuto_Boost/src/cpp/core/options/useOptions.cpp

   1 #include <iostream>
   2 #include <boost/program_options.hpp>
   3
   4 /*----------------------------------------------------------------------*\
   5  |*                     Declaration                                     *|
   6  \*---------------------------------------------------------------------*/
   7
   8 using std::cout;
   9 using std::endl;
  10
  11 namespace po = boost::program_options;
  12
  13 using po::options_description;
  14 using po::value;
  15 using po::variables_map;
  16 using po::store;
  17 using po::parse_command_line;
  18 using po::notify;
  19
  20 /*--------------------------------------*\
  21  |*             Public                  *|
  22  \*-------------------------------------*/
  23
  24 bool useOption(int argc, char** argv);
  25
  26 /*--------------------------------------*\
  27  |*             Private                 *|
  28  \*-------------------------------------*/
  29
  30 static bool use(double a, double b);
  31 static bool help(const options_description& description);
  32
  33 /*----------------------------------------------------------------------*\
  34  |*                     Implementation                                  *|
  35  \*---------------------------------------------------------------------*/
  36
  37 /*--------------------------------------*\
  38  |*             Public                  *|
  39  \*-------------------------------------*/
  40
  41 /**
  42  * http://www.boost.org/doc/libs/1_55_0/doc/html/program_options/tutorial.html#idp163291912
  43  */
  44 bool useOption(int argc, char** argv)
  45     {
  46     double a;
  47     double b;
  48
  49     options_description description("Allowed options");
  50     description.add_options()
  51             ("help", "produce help message")
  52             ("a", value<double>(&a)->default_value(3.14), "explain here what is a ... Example: --a=2.22")
  53             ("b", value<double>(&b)->default_value(1.11), "explain here what is b ... Example: --a=3.33");
  54
  55     variables_map mapVariableValue;
  56     store(parse_command_line(argc, argv, description), mapVariableValue);
  57     notify(mapVariableValue);
  58
  59     if (mapVariableValue.count("help"))
  60         {
  61         return help(description);
  62         }
  63     else
  64         {
  65         return use(a, b);
  66         }
  67     }
  68
  69 /*--------------------------------------*\
  70  |*             Private                 *|
  71  \*-------------------------------------*/
  72
  73 bool use(double a, double b)
  74     {
  75     cout << "[Use Option] : " << endl << endl;
  76
  77     cout << "a= " << a << endl;
  78     cout << "b= " << b << endl;
  79     cout << endl;
  80
  81     return true;
  82     }
  83
  84 bool help(const options_description& description)
  85     {
  86     cout << "[Help] " << endl<<endl;
  87
  88     cout << description << endl<<endl;
  89
  90     cout<< "Write help here ..."<<endl<<endl;
  91
  92     return true;
  93     }
  94
  95 /*----------------------------------------------------------------------*\
  96  |*                     End                                             *|
  97  \*---------------------------------------------------------------------*/
  98