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Regression in Boost.Variant with gcc6.3 in C++03 mode
by dariomt＠gmail.com 28 Jun '17

28 Jun '17

Hi, This is the simplest possible repro I could get: #include <boost/variant.hpp> class A {}; class B : private A {}; typedef boost::variant<A, B> variant_t; int main() { B b; variant_t v (b); } This used to work with Boost 1.59.0 but fails with 1.64.0 Using wandbox I've found that: - it started failing in 1.62.0 - clang does not have this problem - newer and older versions of gcc do have the same problem The error is miles long. I think the important parts are: boost/type_traits/is_convertible.hpp:149:53: error: 'A' is an inaccessible base of 'B' error: no matching function for call to 'boost::variant<A, B>::variant(B&)' It seems the metaprogramming messes up due to the private inheritance, and decides that the variant<A,B> is *not* constructible from B Workarounds are very welcome! Switching to C++14 is not an option (yet). Regards

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Compiling Boost_1_6_0 under linux.
by Michael Miller 27 Jun '17

27 Jun '17

Hello, I’m trying to compile Boost_1_64_0 under linux, without success. Debian 9 gcc version 6.3.0 Terminal commands:- cd tools/build ./bootstrap.sh ./b2 install --prefix=~/boost/boost_1_64_0 No Boost (executable) appears. Am I missing something? Regards

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Build error C3083
by James 26 Jun '17

26 Jun '17

Hi, I am trying to build an application that uses the boost libraries. I am seeing build error C3083 in bind_mf_cc.hpp. The error states: Error C3083 'core': the symbol to the left of a '::' must be a type This is the offending code section : template<class Rt2, class R, class T, class A1> typename boost::enable_if_c<!boost::core::is_same<Rt2,R>::value, _bi::bind_t<Rt2, _mfi::BOOST_BIND_MF_NAME(mf0)<R,T>, typename _bi::list_av_1<A1>::type>>::type BOOST_BIND(R(BOOST_BIND_MF_CC T::*f) (), A1 a1) { typedef _mfi::BOOST_BIND_MF_NAME(mf0)<R, T> F; typedef typename _bi::list_av_1<A1>::type list_type; return _bi::bind_t<Rt2, F, list_type>(F(f), list_type(a1)); } And the line giving the trouble is the line beginning: typename boost::enable_if_c<!boost::core::is_same<Rt2,R>::value, Can anyone help me correct the line to fix this issue please? Thanks.

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[Fiber] Boost 1.63 buffered_channel failed to compile with g++ 4.8 on Ubuntu
by lin li 23 Jun '17

23 Jun '17

Hi, guys. I was trying to compile the example code from Boost website for the buffered_channel in Boost 1.63, but it failed with the following error: In file included from /opt/third_party/include/boost/fiber/all.hpp:15:0, from /home/ak70/HaudDevelopment/HaudCore/HaudCore/Services/HaudSMSService/HaudWorkerJob.h:19, from /home/ak70/HaudDevelopment/HaudCore/HaudCore/Services/HaudSMSService/HaudEndpointWorker.h:16, from /home/ak70/HaudDevelopment/HaudCore/HaudCore/Services/HaudSMSService/HaudEndpointWorker.cpp:7: /opt/third_party/include/boost/fiber/buffered_channel.hpp: In instantiation of ‘boost::fibers::buffered_channel<T>::buffered_channel(std::size_t) [with T = HAUD::SS7Wrapper*; std::size_t = long unsigned int]’: /home/ak70/HaudDevelopment/HaudCore/HaudCore/Services/HaudSMSService/HaudEndpointWorker.cpp:23:25: required from here /opt/third_party/include/boost/fiber/buffered_channel.hpp:49:9: error: use of deleted function ‘std::atomic<long unsigned int>::atomic(const std::atomic<long unsigned int>&)’ slot() = default; ^ In file included from /home/ak70/HaudDevelopment/HaudCore/HaudCore/Services/HaudSMSService/HaudWorkerJob.h:11:0, from /home/ak70/HaudDevelopment/HaudCore/HaudCore/Services/HaudSMSService/HaudEndpointWorker.h:16, from /home/ak70/HaudDevelopment/HaudCore/HaudCore/Services/HaudSMSService/HaudEndpointWorker.cpp:7: /usr/include/c++/4.8/atomic:658:7: error: declared here atomic(const atomic&) = delete; ^ In file included from /opt/third_party/include/boost/fiber/all.hpp:15:0, from /home/ak70/HaudDevelopment/HaudCore/HaudCore/Services/HaudSMSService/HaudWorkerJob.h:19, from /home/ak70/HaudDevelopment/HaudCore/HaudCore/Services/HaudSMSService/HaudEndpointWorker.h:16, from /home/ak70/HaudDevelopment/HaudCore/HaudCore/Services/HaudSMSService/HaudEndpointWorker.cpp:7: /opt/third_party/include/boost/fiber/buffered_channel.hpp:138:16: note: synthesized method ‘boost::fibers::buffered_channel<T>::slot::slot() [with T = HAUD::SS7Wrapper*]’ first required here slots_ = new slot[capacity_](); ^ make[2]: *** [cpm-bin/gitfortytwolocal_haudbackend_haudcore_origin_master/bin/CMakeFiles/HaudCore.dir/HaudCore/Services/HaudSMSService/HaudEndpointWorker.cpp.o] Error 1 make[1]: *** [cpm-bin/gitfortytwolocal_haudbackend_haudcore_origin_master/bin/CMakeFiles/HaudCore.dir/all] Error 2 make: *** [all] Error 2 Any ideas?

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compiling error C1001 for common_type.hpp on boost_1_64_0
by Connie Zhang 20 Jun '17

20 Jun '17

Hi, there, I am getting internal error C1001 on one of the library header file. it points to the line inside the code: template<class T1, class T2, class... T> using common_type_fold = common_type_t<common_type_t<T1, T2>, T...>; Do anyone has some idea for how to fix it? The program is on Visual Studio 2013. Thank you for your input. WZ Sent from Yahoo Mail. Get the app

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Compiling Boost with Qt & gcc ver. 5.3.0
by Michael Miller 20 Jun '17

20 Jun '17

Hello, I've got Boost 1_53_0 & 1_64_0 working with Qt 5.9 (gcc version 5.3.0) and c++ on Windows 10 - 32 bit. Compiling (without warnings) and running from within Qt Creator. In each version of Boost change "std:auto" to "std::unique". That’s it. What this does with MSVC, I don’t know Regards

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Process extension compile issue.
by dinesh kumar 15 Jun '17

15 Jun '17

Hi Team, Greetings for the day. I am currently facing the problem with process extension as documented here <http://www.boost.org/doc/libs/1_64_0/doc/html/boost_process/design.html#boo…> . I am testing the boost 1.64 version macOS, and unable to use the below functionality. void test() { cout << "On Setup" << endl; } int main() { std::function<void(void)> on_st = test; bp::child c2("ls", boost::process::extend::on_setup(on_st)); } *Error: * /usr/local/include/boost/process/detail/handler.hpp:33:9: No matching function for call to object of type 'std::__1::function<void ()>' Would somebody guide me here, please? -- Regards, Dinesh manojadinesh.blogspot.com

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[Boost.Program_options] String options parser
by Belcourt, Kenneth 14 Jun '17

14 Jun '17

Hi, We have an executable that uses the program_options library to process command line options like this: $ ./hilbert.x -h -b [ --hilbert ] arg (=1) enable hilbert matrix -e [ --epsilon ] arg (=0.001) roundoff epsilon -h [ --help ] help message -i [ --input-file ] arg process input file -r [ --rank ] arg rank of matrix to construct -t [ --tolerance ] arg (=1e-13) linear tolerance -v [ --inverse ] arg (=0) enable inverse hilbert matrix -w [ --wordsize ] arg (=8) floating-point word size (bytes) and it works great. Now we’re trying to automate some testing and we test our executable with an input file that has hundreds of lines like this: --inverse 1 --tolerance 1e-15 --rank 2 --inverse 1 --tolerance 1e-15 --rank 3 --inverse 1 --tolerance 1e-15 --rank 4 where each line is a separate test case that we run with the specified options. I was looking for a program options parser that can parse a string, so I can read one line of input from this file into a string, and run that test case, that is something like this: // read one line of input from file ifstream ifp; string buffer; while (!ifp.eof() && ifp.good()) { getline(ifp, buffer); // load a set of command line options from this string po::parse_config_file<char>(buffer.c_str(), desc); } The only program option parsers I see are parse_command_line, parse_config_file, and parse_environment. Is there an easy way (without having to construct an argc/argv data structure) to parse a file of program options? — Noel Belcourt

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Compile errors with Booost_1_64_0
by Michael Miller 13 Jun '17

13 Jun '17

Hello, Windows 10 gcc version 5.3.0 My program compiles OK with Boost_1_53_0. I get a compile failure (3 errors) when including Boost_1_64_0. \boost\boost_1_64_0\boost\numeric\ublas\storage.hpp:299: error: 'make_array' is not a member of 'boost::serialization' ar & serialization::make_array(data_, s); ^ private: friend class boost::serialization::access; // Serialization template<class Archive> void serialize(Archive & ar, const unsigned int /*version*/) { serialization::collection_size_type s(size_); ar & serialization::make_nvp("size",s); if ( Archive::is_loading::value ) { resize(s); } line 299 ar & serialization::make_array(data_, s); } \boost\boost_1_64_0\boost\numeric\ublas\storage.hpp:494: error: 'make_array' is not a member of 'boost::serialization' ar & serialization::make_array(data_, s); ^ private: // Serialization friend class boost::serialization::access; template<class Archive> void serialize(Archive & ar, const unsigned int /*version*/) { serialization::collection_size_type s(size_); ar & serialization::make_nvp("size", s); if ( Archive::is_loading::value ) { if (s > N) bad_size("too large size in bounded_array::load()\n").raise(); resize(s); } line 494 ar & serialization::make_array(data_, s); } \boost\boost_1_64_0\boost\numeric\ublas\matrix.hpp:5977: error: 'make_array' is not a member of 'boost::serialization' ar & serialization::make_array(data_, N); ^ void serialize(Archive & ar, const unsigned int /* file_version */) { // we need to copy to a collection_size_type to get a portable // and efficient serialization serialization::collection_size_type s1 (size1_); serialization::collection_size_type s2 (size2_); // serialize the sizes ar & serialization::make_nvp("size1",s1) & serialization::make_nvp("size2",s2); // copy the values back if loading if (Archive::is_loading::value) { size1_ = s1; size2_ = s2; } // could probably use make_array( &(data[0][0]), N*M ) line 5977 ar & serialization::make_array(data_, N); } Regards

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How do I build x64 binaries with Boost source?
by Osman Zakir 13 Jun '17

13 Jun '17

Hi, How do I specify that I want to build 64-bit binaries when I run bootstrap and then invoke b2? I had a linker error saying, “1>libboost_thread-vc141-mt-gd-1_64.lib(thread.obj) : fatal error LNK1112: module machine type 'X86' conflicts with target machine type 'x64'” when I tried to build an ISAPI extension DLL with Wt (just a simple app using the same code as in the “Hello world” example). [Note: I’m just trying out the wtispai.lib/wisapid.lib connector libraries to see how to use them.] Any help would be appreciated. Thanks in advance. Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10

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