July 2018 - Boost-users - lists.preview.boost.org

[interprocess] Determine size of managed_shared_memory
by Kai Benndorf 12 Oct '19

12 Oct '19

Hi all, I want to create a managed_shared_memory in exactly the size I needed. Therefore I do something like this: size = sizeof( common_managed_shared_memory ); size += sizeof( MyClassInSharedMem ); managed_shared_memory segment(create_only, "name", size ); MyClassInSharedMem allocates itself some memory by segment->allocate(). I added this also to the size, but get a boost::interprocess::bad_alloc exception on allocating this additional memory. Are there some magic bytes I forgot to add? Many thanks in advance Kai

3 2

boost::filtered_graph filtering on vertex color... if I only had a colormap
by Brian Davis 19 Jul '19

19 Jul '19

Lets say I have a graph g (of type graph_t) and a color map (boy I wish I had a colormap): typedef boost::property_map<graph_t, boost::vertex_color_t>::type color_map_t; or is it? auto indexmap = boost::get(boost::vertex_index, g); auto colors = boost::make_vector_property_map<boost::default_color_type>(indexmap); or maybe? auto indexmap = boost::get(boost::vertex_index, g); auto colors = boost::make_vector_property_map<boost::vertex_color_t>(indexmap); or possibly some goop found on the internet? boost::make_iterator_property_map(color_map.begin(), boost::get(boost::vertex_index, data_->g), color_map[0]) or other internet goop? typedef boost::property_map<GraphType, boost::vertex_color_t>::type color_map_t; color_map_t colorMap; boost::color_map(colorMap)) or other internet goop?? std::vector<int> colorMap(num_vertices(g), boost::white_color); so confused... (certainly not surprised why bgl is not a part of stl) Can someone help explain the various types and ways of specifying colormaps and the logic for each way and means? and a function (if I could get that far without VS syntax highlighter going bonkers and gobs of compiler errors.. you know the type): make_pretty(g, colormap ) which colors the graph colormap and a filter struct for boost::filtered_graph<Graph, EdgePredicate, VertexPredicate> (where I wonder why if I only want to filter vertices I have to set boost::keep_all for EdgePredicate... sigh... I know the answer... and also know how long it found me to find/figure out boost::keep_all - and if you are looking for boost::keep_all and found it here... your welcome ;-) ) and modifying (probably incorrectly) boost::filtered_graph example to: template <typename ColorMap> struct vertex_color_filter_eq { vertex_color_filter_eq() { } vertex_color_filter_eq(ColorMap colormap/*, boost::default_color_type c*/) : m_colormap(colormap)/*, m_c(c)*/ { } template <typename Vertex> bool operator()(const Vertex& v) const { return 0 < get(m_colormap, v); //return c < get(m_colormap, v); } ColorMap m_colormap; //boost::default_color_type m_c; }; auto indexmap = boost::get(boost::vertex_index, g); auto colors = boost::make_vector_property_map<boost::default_color_type>(indexmap); // some where here I would call make_pretty(g, colors) typedef property_map<graph_t, boost::vertex_color_t>::type ColorMap_t; vertex_color_filter<ColorMap_t> filter(colors); // boost::filtered_graph<graph_t, boost::keep_all, VertexPredicate> boost::filtered_graph<graph_t, boost::keep_all, vertex_color_filter> fg(g, filter); // Later say if I could get it compile and better if it compiled and worked I could move on and auto color = boost::red_color; typedef property_map<graph_t, boost::vertex_color_t>::type ColorMap_t; vertex_color_filter<ColorMap_t> filter(colors, color); boost::filtered_graph<graph_t, boost::keep_all, vertex_color_filter> fg(g, filter); Maybe if I color them yellow, I can then reach the wizard pull back the curtain and ask how to create a color map... If I only had a color map.

4 6

Boost.Test BOOST_TEST/BOOST_REQUIRE_MESSAGE message arg problems
by Olaf Peter 27 Aug '18

27 Aug '18

Hello Boost Users, for my project I'm testing using BOOST_AUTO_TEST_SUITE and data driven test sets (BOOST_DATA_TEST_CASE). The goal is to check the proper working of a parser by checking success as such and compare the result with a "expected" data (string) vector. In case of parse error, I want to write the captured cout/cerr by boost.test into a file. In case of compare error the parsed result also shall be written to a file. The fragments show the concept/current state: namespace x3_test { // aka utils .... /* [Detect if boost test case failed]( * https://stackoverflow.com/questions/18466857/detect-if-boost-test-case-fail…) */ bool current_test_passing() { using namespace boost::unit_test; auto const id = framework::current_test_case().p_id; auto const test_results = results_collector.results(id); return test_results.passed(); } std::string report_diagnostic(fs::path const& test_case_name, std::string const& input, std::string const& result) { ... if(!x3_test::current_test_passing()) { // only write in case of failed test test_case_result_writer result_writer(test_case_name); result_writer.write(result); } return ss.str(); } } // x3_test ... BOOST_AUTO_TEST_SUITE(.... BOOST_DATA_TEST_CASE( declaration, dataset.input() ^ dataset.expect() ^ dataset.test_case_name(), code, expect_AST, test_case_name) { using attribute_type = ast::declaration; auto const parser = parser::declaration; x3_test::testing_parser<attribute_type> parse; auto [parse_ok, parsed_AST] = parse(code, parser); BOOST_TEST(parse_ok); BOOST_REQUIRE_MESSAGE(parse_ok, x3_test::report_diagnostic(test_case_name, code, parsed_AST) ); BOOST_TEST(parsed_AST == expect_AST, btt::per_element()); BOOST_REQUIRE_MESSAGE(x3_test::current_test_passing(), x3_test::report_diagnostic(test_case_name, code, parsed_AST) ); } BOOST_AUTO_TEST_SUITE_END() After some testing, the error count is twice the real (obviously here) but it's all above a work arround. It seems, that BOOST_REQUIRE_MESSAGE evaluates always the message predicate (shown by using --log_level=all) nevertheless the test case successed or failed. If failed it is streamed to the console. My first thoughs where that the message is called only in case of test failure which isn't true. The problem is now, that my report_diagnostic function write the test output (parsed_AST) to a special dir/file for later evaluating etc. The intuitive way would be: std::string report_diagnostic(fs::path const& test_case_name, std::string const& input, std::string const& result) { ... test_case_result_writer result_writer(test_case_name); result_writer.write(result); return ss.str(); } BOOST_REQUIRE_MESSAGE(parse_ok, // call diagnostic only in failure case and write then x3_test::report_diagnostic(test_case_name, code, parsed_AST) ); BOOST_REQUIRE_MESSAGE((parsed_AST == expect_AST, btt::per_element()), // call diagnostic only in failure case and write then x3_test::report_diagnostic(test_case_name, code, parsed_AST) ); Hence not depending on current_test_passing() any more. How to get this? Further, how can I get the captured std::cerr in case of '!parse_ok' inside report_diagnostic? Thanks, Olaf

2 10

Re: [Boost-users] [release] Boost 1.68.0 Beta 1 -> warnings in gil, locale, geometry, asio, ublas, interprocess, atomic
by Frédéric 09 Aug '18

09 Aug '18

Here are some more warnings while using the libraries: * gil: boost/gil/extension/toolbox/image_types/indexed_image.hpp:190:5: warning: les qualificatifs de type sont ignorés sur le type retourné par la fonction [-Wignored-qualifiers] const std::size_t num_colors() const { return _num_colors; } ^~~~~ boost/gil/extension/dynamic_image/any_image_view.hpp:41:63: warning: unused parameter 'v' [-Wunused-parameter] template <typename T> result_type operator()(const T& v) const { return num_channels<T>::value; } boost/gil/extension/dynamic_image/algorithm.hpp:147:70: warning: unused parameter 'src' [-Wunused-parameter] template <typename V, typename Value> static void apply(const V& src, const Value& val) { throw std::bad_cast();} ^ boost/gil/extension/dynamic_image/algorithm.hpp:147:88: warning: unused parameter 'val' [-Wunused-parameter] template <typename V, typename Value> static void apply(const V& src, const Value& val) { throw std::bad_cast();} ^ boost/gil/extension/dynamic_image/image_view_factory.hpp:178:140: warning: unused parameter 'cc' [-Wunused-parameter] typename color_converted_view_type<any_image_view<ViewTypes>, DstP, CC>::type color_converted_view(const any_image_view<ViewTypes>& src,CC cc) {~ ^ boost/gil/extension/dynamic_image/image_view_factory.hpp:201:144: warning: unused parameter 'cc' [-Wunused-parameter] typename color_converted_view_type<any_image_view<ViewTypes>, DstP, CC>::type any_color_converted_view(const any_image_view<ViewTypes>& src,CC cc) {~ ^ boost/gil/io/device.hpp:446:31: warning: unused parameter 'data' [-Wunused-parameter] void write( const byte_t* data ^ boost/gil/io/device.hpp:447:31: warning: unused parameter 'count' [-Wunused-parameter] , std::size_t count ) ^ boost/gil/io/device.hpp:471:35: warning: unused parameter 'data' [-Wunused-parameter] std::size_t read( byte_t* data ^ boost/gil/io/device.hpp:472:35: warning: unused parameter 'count' [-Wunused-parameter] , std::size_t count ) ^ * locale: boost/locale/utf.hpp:224:17: warning: cette instruction peut poursuivre son chemin [-Wimplicit-fallthrough=] c = (c << 6) | ( tmp & 0x3F); ^ boost/locale/utf.hpp:225:13: note: ici case 2: ^~~~ boost/locale/utf.hpp:231:17: warning: cette instruction peut poursuivre son chemin [-Wimplicit-fallthrough=] c = (c << 6) | ( tmp & 0x3F); ^ boost/locale/utf.hpp:232:13: note: ici case 1: ^~~~ * geometry: boost/geometry/formulas/vertex_longitude.hpp:340:32: warning: unused parameter 'lon1' [-Wunused-parameter] static inline CT apply(CT& lon1, ^ boost/geometry/formulas/vertex_longitude.hpp:341:32: warning: unused parameter 'lat1' [-Wunused-parameter] CT& lat1, ^ boost/geometry/formulas/vertex_longitude.hpp:343:32: warning: unused parameter 'lat2' [-Wunused-parameter] CT& lat2, ^ boost/geometry/formulas/vertex_longitude.hpp:344:38: warning: unused parameter 'vertex_lat' [-Wunused-parameter] CT const& vertex_lat, ^ boost/geometry/formulas/vertex_longitude.hpp:345:32: warning: unused parameter 'alp1' [-Wunused-parameter] CT& alp1, ^ boost/geometry/formulas/vertex_longitude.hpp:346:44: warning: unused parameter 'azimuth_strategy' [-Wunused-parameter] Strategy const& azimuth_strategy) ^ boost/geometry/strategies/spherical/intersection.hpp:544:81: warning: unused parameter 'b2' [-Wunused-parameter] Point2 const& b1, Point2 const& b2, // in ^ boost/geometry/algorithms/detail/envelope/segment.hpp:156:61: warning: unused parameter 'lon1' [-Wunused-parameter] static inline void compute_box_corners(CalculationType& lon1, ^ boost/geometry/algorithms/detail/envelope/segment.hpp:158:61: warning: unused parameter 'lon2' [-Wunused-parameter] CalculationType& lon2, ^ boost/geometry/strategies/spherical/intersection.hpp:544:81: warning: unused parameter 'b2' [-Wunused-parameter] Point2 const& b1, Point2 const& b2, // in ^ * asio (windows 32 and 64 bits with mingw w64 + g++ 8.2.0) : /softs/win32-mingw-8.2.0/release/boost/include/boost/asio/detail/impl/win_iocp_socket_service_base.ipp: Dans la fonction membre « boost::system::error_code boost::asio::detail::win_iocp_socket_service_base::cancel(boost::asio::> /softs/win32-mingw-8.2.0/release/boost/include/boost/asio/detail/impl/win_iocp_socket_service_base.ipp:253:51: warning: transtypage entre types de fonctions incompatibles de « FARPROC » {aka « int (__attribute__((stdcall)) *)()> cancel_io_ex_t cancel_io_ex = (cancel_io_ex_t)cancel_io_ex_ptr; ^~~~~~~~~~~~~~~~ * ublas: /softs/lin64-gcc-8.2.0/debug/boost/include/boost/numeric/ublas/matrix_expression.hpp:2224:17: warning: cette instruction « if » ne protège pas… [-Wmisleading-indentation] if (it2_ != it2_end_) ^~ /softs/lin64-gcc-8.2.0/debug/boost/include/boost/numeric/ublas/matrix_expression.hpp:2227:21: note: …cette instruction, mais l'indentation de cette dernière est trompeuse car elle fait croire qu'elle est gardée par le « if » if (it2_ != it2_end_) { ^~ boost/numeric/ublas/functional.hpp:1673:57: warning: unused parameter 'size_i' [-Wunused-parameter] size_type upper_element (size_type i, size_type size_i, size_type j, size_type size_j) { ^ boost/numeric/ublas/functional.hpp:1673:88: warning: unused parameter 'size_j' [-Wunused-parameter] size_type upper_element (size_type i, size_type size_i, size_type j, size_type size_j) { ^ * interprocess (windows mingw-w64 + g++ 8.2.0 32/64 bits): In file included from boost/interprocess/errors.hpp:41, from boost/interprocess/exceptions.hpp:24, from boost/interprocess/sync/file_lock.hpp:24, from Progs/delypse-transfer.cpp:32: boost/interprocess/detail/win32_api.hpp:189:8: warning: « struct boost::interprocess::winapi::IUnknown_BIPC » a des fonctions virtuelles et un destructeur non virtuel accessible [-Wnon-virtual-dtor] struct IUnknown_BIPC ^~~~~~~~~~~~~ boost/interprocess/detail/win32_api.hpp:200:8: warning: la classe de base « struct boost::interprocess::winapi::IUnknown_BIPC » a un destructeur non virtuel accessible [-Wnon-virtual-dtor] struct IWbemClassObject_BIPC : public IUnknown_BIPC ^~~~~~~~~~~~~~~~~~~~~ boost/interprocess/detail/win32_api.hpp:200:8: warning: « struct boost::interprocess::winapi::IWbemClassObject_BIPC » a des fonctions virtuelles et un destructeur non virtuel accessible [-Wnon-virtual-dtor] boost/interprocess/detail/win32_api.hpp:306:8: warning: la classe de base « struct boost::interprocess::winapi::IUnknown_BIPC » a un destructeur non virtuel accessible [-Wnon-virtual-dtor] struct IWbemContext_BIPC : public IUnknown_BIPC ^~~~~~~~~~~~~~~~~ boost/interprocess/detail/win32_api.hpp:306:8: warning: « struct boost::interprocess::winapi::IWbemContext_BIPC » a des fonctions virtuelles et un destructeur non virtuel accessible [-Wnon-virtual-dtor] boost/interprocess/detail/win32_api.hpp:345:8: warning: la classe de base « struct boost::interprocess::winapi::IUnknown_BIPC » a un destructeur non virtuel accessible [-Wnon-virtual-dtor] struct IEnumWbemClassObject_BIPC : public IUnknown_BIPC ^~~~~~~~~~~~~~~~~~~~~~~~~ boost/interprocess/detail/win32_api.hpp:345:8: warning: « struct boost::interprocess::winapi::IEnumWbemClassObject_BIPC » a des fonctions virtuelles et un destructeur non virtuel accessible [-Wnon-virtual-dtor] boost/interprocess/detail/win32_api.hpp:369:8: warning: la classe de base « struct boost::interprocess::winapi::IUnknown_BIPC » a un destructeur non virtuel accessible [-Wnon-virtual-dtor] struct IWbemServices_BIPC : public IUnknown_BIPC ^~~~~~~~~~~~~~~~~~ boost/interprocess/detail/win32_api.hpp:369:8: warning: « struct boost::interprocess::winapi::IWbemServices_BIPC » a des fonctions virtuelles et un destructeur non virtuel accessible [-Wnon-virtual-dtor] boost/interprocess/detail/win32_api.hpp:518:8: warning: la classe de base « struct boost::interprocess::winapi::IUnknown_BIPC » a un destructeur non virtuel accessible [-Wnon-virtual-dtor] struct IWbemLocator_BIPC : public IUnknown_BIPC ^~~~~~~~~~~~~~~~~ boost/interprocess/detail/win32_api.hpp:518:8: warning: « struct boost::interprocess::winapi::IWbemLocator_BIPC » a des fonctions virtuelles et un destructeur non virtuel accessible [-Wnon-virtual-dtor] In file included from boost/interprocess/errors.hpp:41, from boost/interprocess/exceptions.hpp:24, from boost/interprocess/sync/file_lock.hpp:24, from Progs/delypse-transfer.cpp:32: boost/interprocess/detail/win32_api.hpp: Dans la fonction « bool boost::interprocess::winapi::get_system_time_of_day_information(boost::interprocess::winapi::system_timeofday_information&) »: boost/interprocess/detail/win32_api.hpp:1676:58: warning: transtypage entre types de fonctions incompatibles de « boost::interprocess::winapi::farproc_t » {aka « int (__attribute__((stdcall)) *)() »} vers « boost::interprocess:> dll_func::get(dll_func::NtQuerySystemInformation); ^ boost/interprocess/detail/win32_api.hpp: Dans la fonction « bool boost::interprocess::winapi::unlink_file(const char*) »: boost/interprocess/detail/win32_api.hpp:1892:78: warning: transtypage entre types de fonctions incompatibles de « boost::interprocess::winapi::farproc_t » {aka « int (__attribute__((stdcall)) *)() »} vers « boost::interprocess:> (NtSetInformationFile_t)dll_func::get(dll_func::NtSetInformationFile); ^ boost/interprocess/detail/win32_api.hpp:1894:94: warning: transtypage entre types de fonctions incompatibles de « boost::interprocess::winapi::farproc_t » {aka « int (__attribute__((stdcall)) *)() »} vers « boost::interprocess:> NtQueryObject_t pNtQueryObject = (NtQueryObject_t)dll_func::get(dll_func::NtQueryObject); ^ boost/interprocess/detail/win32_api.hpp:1966:85: warning: transtypage entre types de fonctions incompatibles de « boost::interprocess::winapi::farproc_t » {aka « int (__attribute__((stdcall)) *)() »} vers « boost::interprocess:> NtOpenFile_t pNtOpenFile = (NtOpenFile_t)dll_func::get(dll_func::NtOpenFile); ^ boost/interprocess/detail/win32_api.hpp:1967:73: warning: transtypage entre types de fonctions incompatibles de « boost::interprocess::winapi::farproc_t » {aka « int (__attribute__((stdcall)) *)() »} vers « boost::interprocess:> NtClose_t pNtClose = (NtClose_t)dll_func::get(dll_func::NtClose); ^ boost/interprocess/detail/win32_api.hpp: Dans la fonction « bool boost::interprocess::winapi::get_file_mapping_size(void*, long long int&) »: boost/interprocess/detail/win32_api.hpp:2413:63: warning: transtypage entre types de fonctions incompatibles de « boost::interprocess::winapi::farproc_t » {aka « int (__attribute__((stdcall)) *)() »} vers « boost::interprocess:> (NtQuerySection_t)dll_func::get(dll_func::NtQuerySection); ^ boost/interprocess/detail/win32_api.hpp: Dans la fonction « bool boost::interprocess::winapi::get_semaphore_info(void*, long int&, long int&) »: boost/interprocess/detail/win32_api.hpp:2426:86: warning: transtypage entre types de fonctions incompatibles de « boost::interprocess::winapi::farproc_t » {aka « int (__attribute__((stdcall)) *)() »} vers « boost::interprocess:> (winapi::NtQuerySemaphore_t)dll_func::get(winapi::dll_func::NtQuerySemaphore); ^ boost/interprocess/detail/win32_api.hpp: Dans la fonction « bool boost::interprocess::winapi::query_timer_resolution(long unsigned int*, long unsigned int*, long unsigned int*) »: boost/interprocess/detail/win32_api.hpp:2437:98: warning: transtypage entre types de fonctions incompatibles de « boost::interprocess::winapi::farproc_t » {aka « int (__attribute__((stdcall)) *)() »} vers « boost::interprocess:> (winapi::NtQueryTimerResolution_t)dll_func::get(winapi::dll_func::NtQueryTimerResolution); ^ boost/interprocess/detail/win32_api.hpp: Dans la fonction « bool boost::interprocess::winapi::query_performance_counter(long long int*) »: boost/interprocess/detail/win32_api.hpp:2444:57: warning: transtypage entre types de fonctions incompatibles de « boost::interprocess::winapi::farproc_t » {aka « int (__attribute__((stdcall)) *)() »} vers « boost::interprocess:> dll_func::get(dll_func::QueryPerformanceCounter); ^ boost/interprocess/detail/win32_api.hpp: Dans la fonction « bool boost::interprocess::winapi::query_performance_frequency(long long int*) »: boost/interprocess/detail/win32_api.hpp:2451:59: warning: transtypage entre types de fonctions incompatibles de « boost::interprocess::winapi::farproc_t » {aka « int (__attribute__((stdcall)) *)() »} vers « boost::interprocess:> dll_func::get(dll_func::QueryPerformanceFrequency); ^ * atomic (OSX): boost/include/boost/atomic/detail/ops_gcc_x86_dcas.hpp:269:113: warning: unused parameter 'order' [-Wunused-parameter] static BOOST_FORCEINLINE storage_type exchange(storage_type volatile& storage, storage_type v, memory_order order) BOOST_NOEXCEPT

1 1

ASIO: custom service which works with spawn/yield
by Cristian Morales Vega 02 Aug '18

02 Aug '18

Hi, I have implemented a custom service using Boost 1.67 which works mostly OK, but I have noticed it always returns success when using spawn/yield. The following simplified sample shows the problem: ------------------------------------------------ #include <boost/asio.hpp> #include <boost/asio/spawn.hpp> #include <boost/beast/core/bind_handler.hpp> #include <iostream> class Service : public boost::asio::io_context::service { public: static boost::asio::io_context::id id; typedef int implementation_type; Service(boost::asio::io_context &io_context) : boost::asio::io_context::service(io_context) {} void construct(implementation_type &) {} void destroy(implementation_type &) {} }; boost::asio::io_context::id Service::id; template <typename Service> class BasicObject : protected boost::asio::basic_io_object<Service> { public: explicit BasicObject(boost::asio::io_context &io_context) : boost::asio::basic_io_object<Service>(io_context) {} template <typename ConnectHandler> auto async_method(ConnectHandler &&handler) { BOOST_ASIO_CONNECT_HANDLER_CHECK(ConnectHandler, handler) typeCheck; boost::asio::async_completion<ConnectHandler, void(const boost::system::error_code &)> init(handler); boost::system::error_code ec = boost::asio::error::already_started; boost::asio::post( boost::beast::bind_handler(std::move(init.completion_handler), std::move(ec))); return init.result.get(); } }; int main() { boost::asio::io_context ioContext; BasicObject<Service> myObject(ioContext); #if 1 boost::asio::spawn(ioContext, [&](boost::asio::yield_context yield) { boost::system::error_code ec; myObject.async_method(yield[ec]); std::clog << ec << std::endl; }); #else myObject.async_method([](const boost::system::error_code &ec) { std::clog << ec << std::endl; }); #endif ioContext.run(); return 0; } ------------------------------------------------ The version not using spawn prints "system:114", the one using spawn prints "system:0". What am I doing wrong? Thanks.

6 18

[GIL] Boost gil and constexpr
by Eloi Du Bois 01 Aug '18

01 Aug '18

Hi, It seems that the development on boost::gil is starting again on boost 1.68, and I have an advise: I think boost::gil would strongly benefits on using constexpr in the code, it would make a lot of things statically resolved. There's a huge work to put this everywhere, but I think it would be nice. Just an idea. Thanks,

3 3

Re: [Boost-users] [boost] [release] Boost 1.68.0 Beta 1 -> warnings in filesystem, locale, thread, stacktrace, container
by Frédéric 30 Jul '18

30 Jul '18

1 0

Boost Spirit X3: populating different objects
by Matthieu Brucher 29 Jul '18

29 Jul '18

Hi all, I want to design a parser that can populate two maps while parsing. They have a slightly different values (key is a string in both cases), but I didn't see an example where this was done. Hence I'm not even sure this is possible? Would be easier, otherwise I need to add another check to see what kind of value is populated before I insert it inside my maps? Cheers, Matthieu -- Quantitative analyst, Ph.D. Blog: http://blog.audio-tk.com/ LinkedIn: http://www.linkedin.com/in/matthieubrucher

1 0

Boost Spirit X3 and spaces
by Matthieu Brucher 29 Jul '18

29 Jul '18

Hi, What is the best strategy to handle spaces with X3? The files I want to parse have sometimes spaces or tabs for separators, but I also need to scan number that have an attached suffix (so x3::double_ >> *x3::char_). If now I want to parse groups of strings, starting with a rule like const auto pin = x3::rule<class pin, std::string>() = x3::alpha >> *x3::char_; what is the best to create a vector of these? *pin or pin % ' ' and will the latter also handle tabs by default? Cheers, Matthieu -- Quantitative analyst, Ph.D. Blog: http://blog.audio-tk.com/ LinkedIn: http://www.linkedin.com/in/matthieubrucher

1 0

storing functions obtained with boost.dll as class fields
by Sean Farrow 29 Jul '18

29 Jul '18

Hi, I'm in the process of converting a project being compiled with msvc 2017 to use boost.dll. I've got a shared library loading and need to obtain and store a function in a class-level field. The function has the following typedef: typedef error_status_t (WINAPI *nvdaControllerTestIfRunningFunc)(void); I think my main issue is what shared_libary.Get<t> returns. Any help appreciated. Kind regards Sean.

1 0