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build of datetime library fails
by LAMOTTE Thierry 03 Nov '16

03 Nov '16

Dear Boost community, For the purpose of a project that uses Boost libraries, I tried rebuild Boost but I failed. I would please need some help to complete that building. My context is Microsoft Windows 7, 32 bits, Visual Studio 13 (msvc-12), Boost 1.54.0 My goal is to the create static libraries : libboost_chrono, regex, system, thread and datetime. I initially used a tutorial from the Nordic's github to build Boost : https://github.com/NordicSemiconductor/pc-ble-driver My last try was with Boost 1.54.0 (the one used in the mentioned tuto), the build of datetime library fails (I attached the ouput) and frankly speaking I do not know where I should start looking for. If anyone could help me ? For note, at early stage, I tried with Boost 1.62.0, but the outcome was even worse, I gave up. Best regards, Thierry

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Microsoft and hana
by Dan Bloomquist 31 Oct '16

31 Oct '16

I'm sorry, I take it back. Things were fine until I included <boost/hana.hpp> I had been testing with <boost/hana/core/when.hpp> and the likes of: template<class T> constexpr T pi = T(3.1415926535897932385); // variable template which would not work until I patched. And to quote: In this release, we've updated the C++ compiler and standard library with enhanced support for C++11 and C++14 features, as well as preliminary support for certain features expected to be in the C++17 standard. The most notable compiler changes include complete support for generalized constexpr. Maybe next time.... Best, Dan.

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Microsoft and hana
by Dan Bloomquist 29 Oct '16

29 Oct '16

I did a quick search here and didn't find anything on this. But I just patched up VS2015 with 'Visual Studio "15" Preview 5' <https://www.visualstudio.com/news/releasenotes/vs15-relnotes> and downloaded boost_1_62_0 The compiler now handles variable templates and I've compiled and run some simple hana tests. I did have to comment line 74 in "..\boost\hana\config.hpp". I just thought I'd drop a heads up for those, like me, that wanted to use hana with the Microsoft compiler. Best, Dan.

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Re: [Boost-users] Boost Coroutine
by Emile Cormier 29 Oct '16

29 Oct '16

On 16-10-19 02:57 AM, Oliver Kowalke wrote: > > I'm not the maintainer of boost.asio, so I don't know if an upgrade is > planed - you might ask Christopher Kohlhoff. > This is a bit worrisome to me. We are using the Boost.Asio + Boost.Coroutine integration _extensively_ in our project. Did the API change from Coroutine1 to Coroutine2? Is it simply a matter of including from boost/coroutine2/xxx instead of boost/coroutine/xxx based on some preprocessor macro being defined?

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boost 1.50 unable to make regex_match to work
by MAURICE Jean 27 Oct '16

27 Oct '16

1) Hi Kai, I wrote const_iterator BOOST_REGEX_CALL end()const { // JME 27/10/16 pour savoir si on passe là, je crée une division par 0 en // esperant que le compilateur ne la détecte pas int ijme1, ijme2; ijme2 = 1; ijme1 = 2; --ijme2; ijme1 = ijme1 / ijme2; return (!this->m_status ? 0 : this->m_expression + this->m_expression_len); // return (this->m_status ? 0 : this->m_expression + this->m_expression_len); JME 26/10/16 } Hoping the divide by 0 error would be thrown but it never appears. So I don't think this bug is annoying me. 2) As I am new to boost and regex I tried a simple test : string pattern = "GHI+"; string chaineatester = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"; boost::regex boost_pattern( pattern ); boost::smatch what; int errjme = boost::regex_match( chaineatester, what, boost_pattern ); if (errjme == 1) { *outputLog << "test 1: GHI+ a été trouvé" << endl; } else { *outputLog << "test 1: GHI+ n'a pas été trouvé" << endl; // what[0] contains the whole string // what[1] contains the response code // what[2] contains the separator character // what[3] contains the text message. *outputLog << " what[0]:" << what[0] << endl \ << " what[1]:" << what[1] << endl \ << " what[2]:" << what[2] << endl \ << " what[3]:" << what[3] << endl; } string pattern2 = "GHI"; boost::regex boost_pattern2( pattern2 ); errjme = boost::regex_match( chaineatester, what, boost_pattern2 ); if (errjme == 1) { *outputLog << "test 1bis: GHI a été trouvé" << endl; } else { *outputLog << "test 1bis: GHI n'a pas été trouvé" << endl; *outputLog << " what[0]:" << what[0] << endl \ << " what[1]:" << what[1] << endl \ << " what[2]:" << what[2] << endl \ << " what[3]:" << what[3] << endl; } And here is what I get : test 1: GHI+ n'a pas été trouvé what[0]: what[1]: what[2]: what[3]: test 1bis: GHI n'a pas été trouvé what[0]: what[1]: what[2]: what[3]: What am I doing wrong ? Jean

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[geometry] Stable and fast rtree serialize/de-serialize
by 邓尧 27 Oct '16

27 Oct '16

Hi all, How can I serialize/deserialize a Boost.Geometry rtree reliably and efficiently ? I tried the experimental rtree serialization support built-in (-DBOOST_GEOMETRY_INDEX_DETAIL_EXPERIMENTAL=1), I found that the implementation was unstable and failed to deserialize sometimes. I don't even know whether it corrupted any of the tree nodes. I also implemented a slow hack: save all tree nodes during serialization and rebuild the rtree during deserialization. I want something faster. Serialization time isn't important to me, I just need a faster deserialization (as fast as the experimental implementation) Thanks

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Building Boost with VS15 Preview 5
by Trueman, Chris 26 Oct '16

26 Oct '16

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Can't catch Boost.Asio exceptions inside coroutines
by Sergey Shpikin 25 Oct '16

25 Oct '16

I have this little example of Boost.Asio code: http://codepad.org/tuQedXI7 It works as expected on Linux producing 1 2 Caught Host not found (authoritative) but on Windows it crashes with: 1 2 terminate called after throwing an instance of 'boost::system::system_error' what(): Unknown error Tested on Windows Server 2008, Windows 7 and Wine, everything is the same. I'm compiling on Linux for Windows with MXE ( http://mxe.cc/ ) on GCC 4.9.4, Boost version is 1.60.0. I'm really stuck at this point as nothing in Google looks a valid solution for the case and I already have a working application on Linux but it crashes on any network error on Windows. On Windows coroutines prevent any exceptions from being caught when the program is compiled with -O1/2/3 but they're caught with -O0 or -Os (see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54267 — this is about GCC on FreeBSD but the same seemingly applies to MinGW). However, boost's own exceptions, like the aforementioned boost::system::system_error, still can't be caught.

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boost @ Meeting C++ 2016
by Jens Weller 24 Oct '16

24 Oct '16

Hello boost community, a short and final reminder, that the Meeting C++ conference is just a few weeks away! A few tickets are still available, here is the schedule: https://meetingcpp.com/index.php/schedule16.html The schedule also has the link to the student program and diversity tickets! Also there is still a few places available in the boost workshop with Boris Schäling and Michael Caisse. I plan to have a meetup for boost users in one of the breaks in the upper lounge, so that the boost communtiy is able to actually meet at Meeting C++! thanks, Jens Weller

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boost asio ssl read issue
by Ananth 24 Oct '16

24 Oct '16

Hi, I have posted the question here at StackForge with all the details. http://stackoverflow.com/questions/40163626/boost-asio- ssl-not-working-as-expected-when-used-with-null-buffers Basically, http://www.boost.org/doc/libs/1_40_0/doc/html/ boost_asio/overview/core/reactor.html did not work when used with ssl. With plain-tcp steam socket, it works fine. o If we do ssl_socket->lowest_layer().async_read_some(null_buffers(), read_cb), then we do get all data in read_cb, but read_cb keep getting called endlessly (and read_some then returns 0, with error 11 resource unavailable) (This causes cpu remain over-utilized for ever) If we do ssl_socket->async_read_some(null_buffers(), read_cb), then it works fine with small amounts of data. When larger data is to be received (~20MB or so), then not all data is received. around 1% of data towards the end is never received by the application. My guess is that data is sitting in openssl library some where I tried with latest ssl and boost code, but that did not help either. Can some one please help ? Thanks, Ananth

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