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Parse the "argv" via the Boost.program_options (get the number, string and array from command line) #devsample #boost
/**
* Parse the "argv" via the Boost.program_options
* (get the number, string and array from command line)
*/
#include <iostream>
#include <string>
#include <vector>
#include <boost/program_options.hpp>
/* namespace alias */
namespace po = boost::program_options;
int main(int argc, char **argv)
{
/* examples:
* app -h : print help message
* app --help : print help message
*
* app -f "test" : set the test filename
* app -file "test" : set the test filename
*
* app -n 100 : set the test number
* app --number 100 : set the test number
*
* app -F "1.cpp" "2.cpp" : set test files
* app --files "1.cpp" "2.cpp" : set test files
*/
po::options_description desc("MainOptions");
desc.add_options()
("help,h", "Print help messages")
("file,f",
po::value<std::string>()->default_value("defaultName"),
"A test filename")
("number,n",
po::value<int>()->default_value(0),
"A test Number")
("files,F",
po::value< std::vector<std::string> >()->multitoken(),
"Test files");
po::variables_map vm;
try {
po::store(po::parse_command_line(argc, argv, desc), vm);
}
catch (po::error &e) {
/* Invalid options */
std::cerr << "ERROR: " << e.what() << std::endl << std::endl;
std::cout << "Boost program_options tester:" << std::endl
<< desc << std::endl;
return 0;
}
if (vm.count("help"))
{
/* print usage */
std::cout << "Boost program_options tester:" << std::endl
<< desc << std::endl;
return 0;
}
std::cout << "Test filename: " << vm["file"].as<std::string>()
<< std::endl;
std::cout << "Test number: " << vm["number"].as<int>()
<< std::endl;
if (vm.count("files"))
{
std::vector<std::string> files = vm["files"].as< std::vector<std::string> >();
for (std::vector<std::string>::iterator itr = files.begin(); itr != files.end(); ++itr)
{
std::cout << "Filename: " << *itr << std::endl;
}
}
return 0;
}
# CMake build script (read .ini)
cmake_minimum_required(VERSION 2.8)
# project name & version
project(ProgOpts)
# common settings (Boost libraries)
if (MSVC)
# Enable the static libraries on Windows
foreach (flag_var
CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO
CMAKE_C_FLAGS CMAKE_C_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE
CMAKE_C_FLAGS_MINSIZEREL CMAKE_C_FLAGS_RELWITHDEBINFO)
# update to the static version of the run time library
string(REPLACE "/MD" "/MT" ${flag_var} "${${flag_var}}")
endforeach()
unset(Boost_LIBRARIES)
set(Boost_USE_STATIC ON)
set(Boost_USE_STATIC_LIBS ON)
set(Boost_USE_MULTITHREADED ON)
set(Boost_USE_STATIC_RUNTIME ON)
endif()
find_package(Boost REQUIRED COMPONENTS
program_options)
include_directories("${PROJECT_SOURCE_DIR}"
"${Boost_INCLUDE_DIRS}")
set(progopts_boost_dbg_libs
"${Boost_PROGRAM_OPTIONS_LIBRARY_DEBUG}")
set(progopts_boost_opt_libs
"${Boost_PROGRAM_OPTIONS_LIBRARY_RELEASE}")
# application
add_executable(prog-opts
"${PROJECT_SOURCE_DIR}/0-program-options.cpp")
target_link_libraries(prog-opts
debug "${progopts_boost_dbg_libs}"
optimized "${progopts_boost_opt_libs}")
# install
install(TARGETS prog-opts DESTINATION bin)
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