boost

问题 I'm trying to use the boost_1_55_0 libraries and I keep coming across references to jamfiles. What are jamfiles? Why are there things like bjam and multiple versions of jamfiles? 回答1: Jam is an open source make system built by Perforce. Bjam is a boost variant of jam. One of the advantages of jam is that it is explicitly designed to be a platform independent build system, in contrast to other build systems such as make. 来源： https://stackoverflow.com/questions/22901555/what-is-a-jamfile

问题 I'm trying to use the boost_1_55_0 libraries and I keep coming across references to jamfiles. What are jamfiles? Why are there things like bjam and multiple versions of jamfiles? 回答1: Jam is an open source make system built by Perforce. Bjam is a boost variant of jam. One of the advantages of jam is that it is explicitly designed to be a platform independent build system, in contrast to other build systems such as make. 来源： https://stackoverflow.com/questions/22901555/what-is-a-jamfile

问题 When trying to compile my project with new version of boost 1.65.1, I get the following error: C:\Users\twozn\Dev\soundtoolkit\stk\libraries\boost/geometry/strategies/distance.hpp(101): error C2664: 'int boost::mpl::assertion_failed<false>(boost::mpl::assert<false>::type)': cannot convert argument 1 from 'boost::mpl::failed ************(__cdecl boost::geometry::strategy::distance::services::default_strategy<boost::geometry::point_tag,boost::geometry::segment_tag,boost::geometry::model::point

问题 The following code can be fixed easily, but quite annoying. #include <functional> #include <boost/bind.hpp> void foo() { using namespace std::placeholders; std::bind(_1, _2, _3); // ambiguous } There's a macro BOOST_BIND_NO_PLACEHOLDERS , but using this macro will also bring some drawbacks like causing boost::placeholders disappear from the compile unit included <boost/bind.hpp> but not included <boost/bind/placeholders.hpp> . The name conflicts also comes with other libs like boost::mpl , I

问题 The following code can be fixed easily, but quite annoying. #include <functional> #include <boost/bind.hpp> void foo() { using namespace std::placeholders; std::bind(_1, _2, _3); // ambiguous } There's a macro BOOST_BIND_NO_PLACEHOLDERS , but using this macro will also bring some drawbacks like causing boost::placeholders disappear from the compile unit included <boost/bind.hpp> but not included <boost/bind/placeholders.hpp> . The name conflicts also comes with other libs like boost::mpl , I

问题 I'm trying to send and receive files using boost iostream sockets. what is the most efficient way to read the contents of the file and then send to stream? And how to read this content on the server side and write to file? Send: boost::asio::io_service svc; using boost::asio::ip::tcp; tcp::iostream sockstream(tcp::resolver::query{ "127.0.0.1", "3780" }); std::ifstream fs; fs.open("img.jpg", std::ios::binary); sockstream << // send file to stream Receive: boost::asio::io_service ios; boost:

问题 I'm trying to send and receive files using boost iostream sockets. what is the most efficient way to read the contents of the file and then send to stream? And how to read this content on the server side and write to file? Send: boost::asio::io_service svc; using boost::asio::ip::tcp; tcp::iostream sockstream(tcp::resolver::query{ "127.0.0.1", "3780" }); std::ifstream fs; fs.open("img.jpg", std::ios::binary); sockstream << // send file to stream Receive: boost::asio::io_service ios; boost:

问题 I'm trying to follow this tutorial on boost program_options, but I'm getting this error: error: 'desc' does not name a type. Here is the source code I have: #include <boost/program_options.hpp> using namespace std; namespace po = boost::program_options; po::options_description desc("Allowed options"); desc.add_options() ("help", "produce help message") ("compression", po::value<int>(), "set compression level") ; int main() { return 0; } the error is on the line starting with 'desc.add_options

问题 I'm trying to follow this tutorial on boost program_options, but I'm getting this error: error: 'desc' does not name a type. Here is the source code I have: #include <boost/program_options.hpp> using namespace std; namespace po = boost::program_options; po::options_description desc("Allowed options"); desc.add_options() ("help", "produce help message") ("compression", po::value<int>(), "set compression level") ; int main() { return 0; } the error is on the line starting with 'desc.add_options

问题 With gcc 10.1 and boost 1.73.0, the following code #include <boost/bimap.hpp> int main() { boost::bimap<int, int> lookup; } fails to compile with flags -O2 --std=c++20 , but will succeed with flags -O2 -std=c++17 (verified with compiler explorer). This is possibly related to the following issue: https://github.com/boostorg/bimap/pull/15 (deprecated std::allocator<void> ) Is there some workaround I can use for now to get this code to successfully compile with --std=c++20 ? 回答1: The reason