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Methods to print out boost::program_options objects
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| #include <string.h> | |
| #include <iostream> | |
| #include "boost/program_options.hpp" | |
| #include "boost/filesystem.hpp" | |
| #include "boost/any.hpp" | |
| namespace po = boost::program_options; | |
| inline void PrintUsage(const boost::program_options::options_description desc) { | |
| std::cout << "Usage: " << app_name << " [options]" << std::endl; | |
| std::cout << " App description" << std::endl; | |
| std::cout << desc << std::endl; | |
| std::cout << std::endl << "v" << VERSION << std::endl; | |
| } | |
| inline void PrintVariableMap(const boost::program_options::variables_map vm) { | |
| for (po::variables_map::iterator it = vm.begin(); it != vm.end(); it++) { | |
| std::cout << "> " << it->first; | |
| if (((boost::any)it->second.value()).empty()) { | |
| std::cout << "(empty)"; | |
| } | |
| if (vm[it->first].defaulted() || it->second.defaulted()) { | |
| std::cout << "(default)"; | |
| } | |
| std::cout << "="; | |
| bool is_char; | |
| try { | |
| boost::any_cast<const char *>(it->second.value()); | |
| is_char = true; | |
| } catch (const boost::bad_any_cast &) { | |
| is_char = false; | |
| } | |
| bool is_str; | |
| try { | |
| boost::any_cast<std::string>(it->second.value()); | |
| is_str = true; | |
| } catch (const boost::bad_any_cast &) { | |
| is_str = false; | |
| } | |
| if (((boost::any)it->second.value()).type() == typeid(int)) { | |
| std::cout << vm[it->first].as<int>() << std::endl; | |
| } else if (((boost::any)it->second.value()).type() == typeid(bool)) { | |
| std::cout << vm[it->first].as<bool>() << std::endl; | |
| } else if (((boost::any)it->second.value()).type() == typeid(double)) { | |
| std::cout << vm[it->first].as<double>() << std::endl; | |
| } else if (is_char) { | |
| std::cout << vm[it->first].as<const char * >() << std::endl; | |
| } else if (is_str) { | |
| std::string temp = vm[it->first].as<std::string>(); | |
| if (temp.size()) { | |
| std::cout << temp << std::endl; | |
| } else { | |
| std::cout << "true" << std::endl; | |
| } | |
| } else { // Assumes that the only remainder is vector<string> | |
| try { | |
| std::vector<std::string> vect = vm[it->first].as<std::vector<std::string> >(); | |
| uint i = 0; | |
| for (std::vector<std::string>::iterator oit=vect.begin(); | |
| oit != vect.end(); oit++, ++i) { | |
| std::cout << "\r> " << it->first << "[" << i << "]=" << (*oit) << std::endl; | |
| } | |
| } catch (const boost::bad_any_cast &) { | |
| std::cout << "UnknownType(" << ((boost::any)it->second.value()).type().name() << ")" << std::endl; | |
| } | |
| } | |
| } | |
| } |
This will not work if you have custom validators.
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I just tested this recently. I found the need to make one change (declaring a const_iterator) on line 18:
for (po::variables_map::const_iterator it = vm.begin(); it != vm.end(); it++) {