Boost Program_Options 如何处理数组向量？
How can Boost Program_Options handle vector of arrays?
在我的程序中，我需要使用 Eigen 库执行一些转换。当我使用配置文件供用户调整某些设置时，我正在寻找一种将转换集成到该配置文件中的方法。我想出了以下代码：
#include <boost\program_options.hpp>
#include <boost\log\trivial.hpp>
#include <Eigen\Geometry>
namespace po = boost::program_options;
int main(int ac, char* av[])
{
std::vector<std::array<double, 16>> trans;
try {
po::options_description desc("Options");
desc.add_options()
("help,h", "Produce help message")
("config,c", po::value<std::string>(&configPath), "Path of the config file.")
("trans", po::value<std::vector<std::array<double, 16>>>(&trans)->multitoken(), "Vector of 4D Transformation Matrix. Syntax: {x_11, ..., x_14, x_21, ..., x_24, ..., x_44}")
;
po::variables_map vm;
po::store(po::parse_command_line(ac, av, desc), vm);
po::notify(vm);
if (vm.count("help")) {
BOOST_LOG_TRIVIAL(info) << desc;
return EXIT_SUCCESS;
}
std::ifstream configFile(configPath);
po::store(po::parse_config_file(configFile, desc), vm);
po::notify(vm);
}
catch (std::exception& e) {
BOOST_LOG_TRIVIAL(error) << "error: " << e.what();
return EXIT_FAILURE;
}
catch (...) {
BOOST_LOG_TRIVIAL(error) << "Exception of unknown type!";
return EXIT_FAILURE;
}
Eigen::Affine3d transAff(Eigen::Matrix4d(trans.data()).transpose());
// Do some stuff
}
但不幸的是，我在构建解决方案时 运行 出错了。错误发生在转换的 add_options 行并显示：
myDirectory\vcpkg\installed\x64-windows\include\boost\lexical_cast\detail\converter_lexical.hpp(243): error C2338: Target type is neither std::istream`able nor std::wistream`able
myDirectory\vcpkg\installed\x64-windows\include\boost\lexical_cast\detail\converter_lexical.hpp(270): note: see reference to class template instantiation 'boost::detail::deduce_target_char_impl<boost::detail::deduce_character_type_later<std::array<double,16>>>' being compiled
myDirectory\vcpkg\installed\x64-windows\include\boost\lexical_cast\detail\converter_lexical.hpp(407): note: see reference to class template instantiation 'boost::detail::deduce_target_char<Target>' being compiled
with
[
Target=std::array<double,16>
]
myDirectory\vcpkg\installed\x64-windows\include\boost\lexical_cast\detail\converter_lexical.hpp(464): note: see reference to class template instantiation 'boost::detail::lexical_cast_stream_traits<Source,Target>' being compiled
with
[
Source=src,
Target=std::array<double,16>
]
myDirectory\vcpkg\installed\x64-windows\include\boost\lexical_cast\try_lexical_convert.hpp(196): note: see reference to class template instantiation 'boost::detail::lexical_converter_impl<Target,src>' being compiled
with
[
Target=std::array<double,16>
]
myDirectory\vcpkg\installed\x64-windows\include\boost\lexical_cast.hpp(41): note: see reference to function template instantiation 'bool boost::conversion::detail::try_lexical_convert<Target,Source>(const Source &,Target &)' being compiled
with
[
Target=std::array<double,16>,
Source=std::basic_string<char,std::char_traits<char>,std::allocator<char>>
]
myDirectory\vcpkg\installed\x64-windows\include\boost\program_options\detail\value_semantic.hpp(92): note: see reference to function template instantiation 'Target boost::lexical_cast<T,std::basic_string<char,std::char_traits<char>,std::allocator<char>>>(const Source &)' being compiled
with
[
Target=std::array<double,16>,
T=std::array<double,16>,
Source=std::basic_string<char,std::char_traits<char>,std::allocator<char>>
]
myDirectory\vcpkg\installed\x64-windows\include\boost\program_options\detail\value_semantic.hpp(149): note: see reference to function template instantiation 'void boost::program_options::validate<T,char>(boost::any &,const std::vector<std::string,std::allocator<_Ty>> &,T *,long)' being compiled
with
[
T=std::array<double,16>,
_Ty=std::string
]
myDirectory\vcpkg\installed\x64-windows\include\boost\program_options\detail\value_semantic.hpp(184): note: see reference to function template instantiation 'void boost::program_options::validate<std::array<double,16>,char>(boost::any &,const std::vector<std::string,std::allocator<_Ty>> &,std::vector<std::array<double,16>,std::allocator<std::array<double,16>>> *,int)' being compiled
with
[
_Ty=std::string
]
myDirectory\vcpkg\installed\x64-windows\include\boost\program_options\detail\value_semantic.hpp(177): note: while compiling class template member function 'void boost::program_options::typed_value<std::vector<std::array<double,16>,std::allocator<_Ty>>,char>::xparse(boost::any &,const std::vector<std::string,std::allocator<std::basic_string<char,std::char_traits<char>,std::allocator<char>>>> &) const'
with
[
_Ty=std::array<double,16>
]
myDirectory\myProgram\src\myProgram.cpp(91): note: see reference to class template instantiation 'boost::program_options::typed_value<std::vector<std::array<double,16>,std::allocator<_Ty>>,char>' being compiled
with
[
_Ty=std::array<double,16>
]
我认为错误是由于我尝试这样做的方式不支持数组向量。有没有什么方法可以做到这一点，或者有更聪明的方法来处理这些转换？
非常感谢！
我自己解决了这个问题，做了一些修改。如果其他人有同样的问题，我希望我能帮助他解答。
C++ 中的数组
在第一步中，我将所有数组更改为 std::vector，因为更多功能以及许多帖子不鼓励使用数组，例如 here.
使用std::string临时替代内部std::vector
由于vector in vector是程序选项的难点（因为multitoken只是给一个vector添加元素，不能区分vector的层数），我把里面的std::vector换成了字符串，所以add_options 现在是
std::vector<std::string> trans;
try {
po::options_description desc("Options");
desc.add_options()
("help,h", "Produce help message")
("config,c", po::value<std::string>(&configPath), "Path of the config file.")
("trans", po::value<std::vector<std::string>>(&trans)->multitoken(), "Vector of 4D Transformation Matrix. Syntax: x_11 ... x_14 x_21 ... x_24 ... x_44")
;
...
从 std::string 到 std::vector<double>
的转换
现在我们可以将输入的字符串转换为双精度向量，因为它们可用于创建 Eigen::Matrix 和 Eigen::Vector。我从 的 NathanOliver 那里得到了这个想法，我是这样使用的：
std::vector<double> str2vec(std::string str) {
std::vector<double> out;
std::stringstream ss(str);
double tmpVal;
while (ss >> tmpVal)
out.push_back(tmpVal);
return out;
}
一起
最后我的代码看起来像这样：
#include <boost\program_options.hpp>
#include <boost\log\trivial.hpp>
#include <Eigen\Geometry>
namespace po = boost::program_options;
std::vector<double> str2vec(std::string str) {
std::vector<double> out;
std::stringstream ss(str);
double tmpVal;
while (ss >> tmpVal)
out.push_back(tmpVal);
return out;
}
int main(int ac, char* av[])
{
std::vector<std::string> transVecStr;
try {
po::options_description desc("Options");
desc.add_options()
("help,h", "Produce help message")
("config,c", po::value<std::string>(&configPath), "Path of the config file.")
("transVecStr", po::value<std::vector<std::string>>(&transVecStr)->multitoken(), "Vector of 4D Transformation Matrix. Syntax: x_11 ... x_14 x_21 ... x_24 ... x_44")
;
po::variables_map vm;
po::store(po::parse_command_line(ac, av, desc), vm);
po::notify(vm);
if (vm.count("help")) {
BOOST_LOG_TRIVIAL(info) << desc;
return EXIT_SUCCESS;
}
std::ifstream configFile(configPath);
po::store(po::parse_config_file(configFile, desc), vm);
po::notify(vm);
}
catch (std::exception& e) {
BOOST_LOG_TRIVIAL(error) << "error: " << e.what();
return EXIT_FAILURE;
}
catch (...) {
BOOST_LOG_TRIVIAL(error) << "Exception of unknown type!";
return EXIT_FAILURE;
}
std::vector<Eigen::Affine3d> affineVec;
for(int i = 0; i<transVecStr.size();i++){
affineVec.emplace_back(Eigen::Matrix4d(str2vec(transVecStr[i]).data()).transpose());
}
// Do some stuff
}
在我的程序中，我需要使用 Eigen 库执行一些转换。当我使用配置文件供用户调整某些设置时，我正在寻找一种将转换集成到该配置文件中的方法。我想出了以下代码：
#include <boost\program_options.hpp>
#include <boost\log\trivial.hpp>
#include <Eigen\Geometry>
namespace po = boost::program_options;
int main(int ac, char* av[])
{
std::vector<std::array<double, 16>> trans;
try {
po::options_description desc("Options");
desc.add_options()
("help,h", "Produce help message")
("config,c", po::value<std::string>(&configPath), "Path of the config file.")
("trans", po::value<std::vector<std::array<double, 16>>>(&trans)->multitoken(), "Vector of 4D Transformation Matrix. Syntax: {x_11, ..., x_14, x_21, ..., x_24, ..., x_44}")
;
po::variables_map vm;
po::store(po::parse_command_line(ac, av, desc), vm);
po::notify(vm);
if (vm.count("help")) {
BOOST_LOG_TRIVIAL(info) << desc;
return EXIT_SUCCESS;
}
std::ifstream configFile(configPath);
po::store(po::parse_config_file(configFile, desc), vm);
po::notify(vm);
}
catch (std::exception& e) {
BOOST_LOG_TRIVIAL(error) << "error: " << e.what();
return EXIT_FAILURE;
}
catch (...) {
BOOST_LOG_TRIVIAL(error) << "Exception of unknown type!";
return EXIT_FAILURE;
}
Eigen::Affine3d transAff(Eigen::Matrix4d(trans.data()).transpose());
// Do some stuff
}
但不幸的是，我在构建解决方案时 运行 出错了。错误发生在转换的 add_options 行并显示：
myDirectory\vcpkg\installed\x64-windows\include\boost\lexical_cast\detail\converter_lexical.hpp(243): error C2338: Target type is neither std::istream`able nor std::wistream`able
myDirectory\vcpkg\installed\x64-windows\include\boost\lexical_cast\detail\converter_lexical.hpp(270): note: see reference to class template instantiation 'boost::detail::deduce_target_char_impl<boost::detail::deduce_character_type_later<std::array<double,16>>>' being compiled
myDirectory\vcpkg\installed\x64-windows\include\boost\lexical_cast\detail\converter_lexical.hpp(407): note: see reference to class template instantiation 'boost::detail::deduce_target_char<Target>' being compiled
with
[
Target=std::array<double,16>
]
myDirectory\vcpkg\installed\x64-windows\include\boost\lexical_cast\detail\converter_lexical.hpp(464): note: see reference to class template instantiation 'boost::detail::lexical_cast_stream_traits<Source,Target>' being compiled
with
[
Source=src,
Target=std::array<double,16>
]
myDirectory\vcpkg\installed\x64-windows\include\boost\lexical_cast\try_lexical_convert.hpp(196): note: see reference to class template instantiation 'boost::detail::lexical_converter_impl<Target,src>' being compiled
with
[
Target=std::array<double,16>
]
myDirectory\vcpkg\installed\x64-windows\include\boost\lexical_cast.hpp(41): note: see reference to function template instantiation 'bool boost::conversion::detail::try_lexical_convert<Target,Source>(const Source &,Target &)' being compiled
with
[
Target=std::array<double,16>,
Source=std::basic_string<char,std::char_traits<char>,std::allocator<char>>
]
myDirectory\vcpkg\installed\x64-windows\include\boost\program_options\detail\value_semantic.hpp(92): note: see reference to function template instantiation 'Target boost::lexical_cast<T,std::basic_string<char,std::char_traits<char>,std::allocator<char>>>(const Source &)' being compiled
with
[
Target=std::array<double,16>,
T=std::array<double,16>,
Source=std::basic_string<char,std::char_traits<char>,std::allocator<char>>
]
myDirectory\vcpkg\installed\x64-windows\include\boost\program_options\detail\value_semantic.hpp(149): note: see reference to function template instantiation 'void boost::program_options::validate<T,char>(boost::any &,const std::vector<std::string,std::allocator<_Ty>> &,T *,long)' being compiled
with
[
T=std::array<double,16>,
_Ty=std::string
]
myDirectory\vcpkg\installed\x64-windows\include\boost\program_options\detail\value_semantic.hpp(184): note: see reference to function template instantiation 'void boost::program_options::validate<std::array<double,16>,char>(boost::any &,const std::vector<std::string,std::allocator<_Ty>> &,std::vector<std::array<double,16>,std::allocator<std::array<double,16>>> *,int)' being compiled
with
[
_Ty=std::string
]
myDirectory\vcpkg\installed\x64-windows\include\boost\program_options\detail\value_semantic.hpp(177): note: while compiling class template member function 'void boost::program_options::typed_value<std::vector<std::array<double,16>,std::allocator<_Ty>>,char>::xparse(boost::any &,const std::vector<std::string,std::allocator<std::basic_string<char,std::char_traits<char>,std::allocator<char>>>> &) const'
with
[
_Ty=std::array<double,16>
]
myDirectory\myProgram\src\myProgram.cpp(91): note: see reference to class template instantiation 'boost::program_options::typed_value<std::vector<std::array<double,16>,std::allocator<_Ty>>,char>' being compiled
with
[
_Ty=std::array<double,16>
]
我认为错误是由于我尝试这样做的方式不支持数组向量。有没有什么方法可以做到这一点，或者有更聪明的方法来处理这些转换？
非常感谢！
我自己解决了这个问题，做了一些修改。如果其他人有同样的问题，我希望我能帮助他解答。
C++ 中的数组
在第一步中，我将所有数组更改为 std::vector，因为更多功能以及许多帖子不鼓励使用数组，例如 here.
使用std::string临时替代内部std::vector
由于vector in vector是程序选项的难点（因为multitoken只是给一个vector添加元素，不能区分vector的层数），我把里面的std::vector换成了字符串，所以add_options 现在是
std::vector<std::string> trans;
try {
po::options_description desc("Options");
desc.add_options()
("help,h", "Produce help message")
("config,c", po::value<std::string>(&configPath), "Path of the config file.")
("trans", po::value<std::vector<std::string>>(&trans)->multitoken(), "Vector of 4D Transformation Matrix. Syntax: x_11 ... x_14 x_21 ... x_24 ... x_44")
;
...
从 std::string 到 std::vector<double>
的转换
现在我们可以将输入的字符串转换为双精度向量，因为它们可用于创建 Eigen::Matrix 和 Eigen::Vector。我从
std::vector<double> str2vec(std::string str) {
std::vector<double> out;
std::stringstream ss(str);
double tmpVal;
while (ss >> tmpVal)
out.push_back(tmpVal);
return out;
}
一起
最后我的代码看起来像这样：
#include <boost\program_options.hpp>
#include <boost\log\trivial.hpp>
#include <Eigen\Geometry>
namespace po = boost::program_options;
std::vector<double> str2vec(std::string str) {
std::vector<double> out;
std::stringstream ss(str);
double tmpVal;
while (ss >> tmpVal)
out.push_back(tmpVal);
return out;
}
int main(int ac, char* av[])
{
std::vector<std::string> transVecStr;
try {
po::options_description desc("Options");
desc.add_options()
("help,h", "Produce help message")
("config,c", po::value<std::string>(&configPath), "Path of the config file.")
("transVecStr", po::value<std::vector<std::string>>(&transVecStr)->multitoken(), "Vector of 4D Transformation Matrix. Syntax: x_11 ... x_14 x_21 ... x_24 ... x_44")
;
po::variables_map vm;
po::store(po::parse_command_line(ac, av, desc), vm);
po::notify(vm);
if (vm.count("help")) {
BOOST_LOG_TRIVIAL(info) << desc;
return EXIT_SUCCESS;
}
std::ifstream configFile(configPath);
po::store(po::parse_config_file(configFile, desc), vm);
po::notify(vm);
}
catch (std::exception& e) {
BOOST_LOG_TRIVIAL(error) << "error: " << e.what();
return EXIT_FAILURE;
}
catch (...) {
BOOST_LOG_TRIVIAL(error) << "Exception of unknown type!";
return EXIT_FAILURE;
}
std::vector<Eigen::Affine3d> affineVec;
for(int i = 0; i<transVecStr.size();i++){
affineVec.emplace_back(Eigen::Matrix4d(str2vec(transVecStr[i]).data()).transpose());
}
// Do some stuff
}