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

SSL certificate expired
by Martin Honermeyer 10 Apr '15

10 Apr '15

Hi, I just wanted to post a note in case administrators are not yet aware: The SSL certificate for *.boost.org has expired and needs to be replaced. This affects e.g. https://svn.boost.org/. Best, Martin

2 2

FW: [phoenix][spirit][qi][utility] Version 1.57 of Boost Phoenix breaks when used with MSVC 2010 compiler?
by Andrew Nordquist 09 Apr '15

09 Apr '15

Hello, Boost Phoenix folks - I sent the message below a few weeks ago, looking for assistance in getting Boost 1.57 to compile with MSVC 2010 and my complex C++ code. I have yet to receive a response. Perhaps it was misdirected; maybe I need to send this to [spirit] or [qi] or [utility] or ...? In the weeks since I sent this, I have not exactly been idle on the subject. I have installed Boost 1.54, 1.55, and 1.56 on my computer. I have in turn tried each version by just switching out the include and linker locations. So far, I have found out that 1.53, 1.54, and 1.55 compile successfully. However, switching to 1.56 or 1.57, there is no success. The diagnostics for both versions are similar, regarding too few template arguments for a call to [utility] result_of.hpp that <boost/phoenix/core/detail/preprocessed/function_eval_10.hpp> is making. Does anyone have any ideas or suggestions on how to make Boost 1.57 work with MSVC 2010 and my code? I would be grateful. Thank you, /Andrew Nordquist From: Andrew Nordquist Sent: Thursday, March 19, 2015 12:35 PM To: 'boost-users(a)lists.boost.org' Subject: [Phoenix] Version 1.57 of Phoenix breaks when used with MSVC 2010 compiler? Hello, folks - I must be doing something wrong, but I can't figure it out. I/we have been using Boost in our 20,000+ lines of C++ code for a few years now. We started with 1.43, went smoothly to 1.53, and although it was bumpy going from MSVC 2008 to MSVC 2010, we are there now. We are now using MSVC 2010 and Boost 1.53. We use many routines, including Phoenix, Spirit, bind, tie, etc. I am attempting to migrate to Boost 1.57. Got clobbered with about 400 lines of unexpected diagnostic in the compiler. That is the attached file. In the file, the lines showing the files named "cutoffitem.cpp" and "densitydelegate.cpp" are ours, but what is between these two lines is coming from Boost. It appears that it could be a C++11 type of problem, but I'm not sure . I read about that potential problem with the [utility] [result_of] class template in the report designated n3276 and in the 1.57 [utility] documentation. I think the major concern with this issue was going to Boost 1.52. In our code, I tried a quick-fix precompiler #define, but it did not work. Got any ideas? I'm about to go back to version 1.53, at least until I upgrade to Visual Studio 2013. Thank you, /Andrew Nordquist Research Analyst Southwest Research Institute San Antonio, TX, USA

1 0

Multiple defined symbols
by Lloyd 09 Apr '15

09 Apr '15

Hi, I have a "dll" project which is dependent on boost libraries like thread and system. When I compile my project I gen error like libboost_thread-vc120-mt-gd-1_57.lib(thread.obj) : error LNK2005: "public: virtual __thiscall boost::detail::thread_data_base::~thread_data_base(void)" (??1thread_data_base@detail@boost@@UAE@XZ) already defined in boost_thread-vc120-mt-gd-1_57.lib(boost_thread-vc120-mt-gd-1_57.dll) What I understood from this error is, my project is trying to link to both dynamic and static boost libraries. I only want to link to the boost thread dll. To my knowledge am not directly using any boost autolink feature. In the visual studio linking option I have mentioned only the "boost_thread-vc120-mt-gd-1_57.lib". Why could it be trying to link to libboost_thread-vc120-mt-gd-1_57.lib? Is there any way to find where this is happening? Thanks, Lloyd

4 6

[units] non-rational scaling
by Matthias Wohlgemuth 08 Apr '15

08 Apr '15

Dear all, I have an issue with scaled units. I tried to implement a non-rational scaling of units adapted from scale<> class (all in boost::units namespace): template<class Derived> struct non_rational_scale { static const unsigned long base = 10; typedef boost::units::static_rational<0> exponent; typedef double value_type; static double value() { return Derived::value(); } static std::string name() { return Derived::name(); } static std::string symbol() { return Derived::symbol(); } }; struct electron_volt_scale : non_rational_scale<electron_volt_scale> { static double value() { return 1.60218e-19; } /* elementary charge in Coulombs */ static std::string name() { return "electron volt"; } static std::string symbol() { return "eV"; } }; typedef make_scaled_unit<si::energy, electron_volt_scale>::type electron_volt; This works fine in one direction: quantity<si::energy>(1.*electron_volt()); /* gives 1.60218e-19 J. */ However, in the other direction quantity<electron_volt>(1.*si::joule); /* gives 1 eV */ I guess, that I need some specialization for non_rational_scale to workout the correct scaling factor in the reverse direction. Thank you for your help, Matthias

1 0

Can't build boost 1.57 for MinGW
by Jabaa 07 Apr '15

07 Apr '15

Dear all, I can't build boost 1.57 for MinGW on Win7. I tried D:\boost_1_57_0>bootstrap.bat mingw D:\boost_1_57_0>.\b2 toolset=gcc install and I only got D:/boost_1_57_0/tools/build/src/tools\msvc.jam:1075: in configure-really *** argument error * rule generate-setup-cmd ( version : command : parent : options * : cpu : global-setup : default-global-setup-options : default-setup ) * called with: ( 9.0 : C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\bin : C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC : <command>C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\bin\cl.exe : i386 : : x86 : vcvars32.bat ) * missing argument global-setup D:/boost_1_57_0/tools/build/src/tools\msvc.jam:809:see definition of rule 'generate-setup-cmd' being called D:/boost_1_57_0/tools/build/src/tools\msvc.jam:201: in configure D:/boost_1_57_0/tools/build/src/tools\msvc.jam:153: in msvc.init D:/boost_1_57_0/tools/build/src/build\toolset.jam:43: in toolset.using D:/boost_1_57_0/tools/build/src/build\project.jam:1007: in using project-config.jam:3: in modules.load D:/boost_1_57_0/tools/build/src\build-system.jam:249: in load-config D:/boost_1_57_0/tools/build/src\build-system.jam:412: in load-configuration-files D:/boost_1_57_0/tools/build/src\build-system.jam:524: in load D:\boost_1_57_0\tools\build\src/kernel\modules.jam:289: in import D:\boost_1_57_0\tools\build\src/kernel/bootstrap.jam:139: in boost-build D:\boost_1_57_0\boost-build.jam:17: in module scope What is wrong? Thanks

1 0

1.58.0 rc2 is now available
by Marshall Clow 06 Apr '15

06 Apr '15

Release candidate files for 1.58.0 are available at: http://boost.cowic.de/rc/ Since rc1, the changes that were causing the serialization libraries to fail to build on MSVC have been reverted. As always, the release managers would appreciate it if you download the candidate of your choice and give building it a try. Please report both success and failure, and anything else that is noteworthy. This helps ensure the candidates build OK before we push them out to SourceForge. The files (and associated md5s) are: MD5 (boost_1_58_0_rc2.7z) = 43e0d47cc9f5f2a07761808b9da57c0a MD5 (boost_1_58_0_rc2.tar.bz2) = 52147381c97685eb045b5b022ad51a35 MD5 (boost_1_58_0_rc2.tar.gz) = cb33afaa557dea2f700bffec8a91d87e MD5 (boost_1_58_0_rc2.zip) = 412676a9a7d9903eb5a260209ad78f0a Thanks! -- The release managers P.S. Release notes are here: http://www.boost.org/users/history/version_1_58_0.html

1 0

[1.58.0] Release candidates available
by Marshall Clow 06 Apr '15

06 Apr '15

Release candidate files for 1.58.0 are available at: http://boost.cowic.de/rc/ As always, the release managers would appreciate it if you download the candidate of your choice and give building it a try. Please report both success and failure, and anything else that is noteworthy. This helps ensure the candidates build OK before we push them out to SourceForge. The files (and associated md5s) are: MD5 (boost_1_58_0_rc1.7z) = 609ea035fd3b9f1da110f640c9b8d1e6 MD5 (boost_1_58_0_rc1.tar.bz2) = 7edf680e2532a0370bce64e8e847d661 MD5 (boost_1_58_0_rc1.tar.gz) = 0e435db6a5963e58ffa8d7df49ab5846 MD5 (boost_1_58_0_rc1.zip) = a8d1761306a2ea020e92de53a5cae82d Thanks! -- The release managers P.S. Release notes are here: http://www.boost.org/users/history/version_1_58_0.html

4 5

Call for Papers for Meeting C++ 2015 ends on Wednesday
by Jens Weller 05 Apr '15

05 Apr '15

Hello Boost & Qt Community, the call for papers for this years Meeting C++ Conference got extended and ends on Wednesday(April 8th) next week! Especially talks about libraries have still a good chance to get voted into the conference, and also the embedded theme track! CfP announcement: http://meetingcpp.com/index.php/newsreader/items/call-for-papers-for-meetin… The voting will begin shortly after the end of the CfP and run ~10 days, this will give me guidance to select the right talks for this years conference! thanks, Jens Weller

1 0

error: Name clash for '<p/home/nr/dev/dist/boost/lib>libboost_system.a'
by Nathan Ridge 04 Apr '15

04 Apr '15

Hi, I just downloaded the boost 1.58 beta. Tried to build with: ./b2 --with-filesystem --with-system --with-atomic --with-chrono --with-date_time --with-program_options --with-regex --with-test --with-thread --with-random --with-context --with-coroutine variant=release link=static runtime-link=static threading=multi toolset=gcc cxxflags=-Wno-unused-local-typedefs install Got the following error: Performing configuration checks - 32-bit : no - 64-bit : yes - arm : no - mips1 : no - power : no - sparc : no - x86 : yes - lockfree boost::atomic_flag : yes - lockfree boost::atomic_flag : yes - has_icu builds : no error: Name clash for '<p/home/nr/dev/dist/boost/lib>libboost_system.a' error: error: Tried to build the target twice, with property sets having error: these incompabile properties: error: error: - none error: - <address-model>64 <architecture>x86 error: error: Please make sure to have consistent requirements for these error: properties everywhere in your project, especially for install error: targets. Some googling reveals that people suggest adding '--without-context --without-coroutine' to work around the problem, but this is not an option for me because I use these libraries! What can I do to fix this? Thanks, Nate

2 2

[polygon] Voronoi diagram: weird results
by Jeremy Murphy 03 Apr '15

03 Apr '15

Hi, I started using the voronoi_diagram functionality recently and am getting some weird results that I need help interpreting. Here is an example: https://drive.google.com/open?id=0B9-L1xN12iKVYUlMb1hLY0FEMWs&authuser=0 What you can see here is a salmon (?) coloured layer of polygons (input) underneath a semi-transparent layer of pale blue polygons (output) and a boundary. So you can see that some of the output looks 'good', as in, regular and usable, but on the right-hand side there is some obvious 'bad' results that I cannot completely explain. The missing polygons are almost certainly because I have culled any polygons from the output that included points outside the boundary. But there are also appears to be some 'bad' polygons in the output that overlap 'good' ones. So I guess my initial question is: is this a typical symptom of something that other users of the voronoi_diagram recognize? I'm using Boost.Geometry for all other geometric processing. Thanks, cheers. Jeremy

1 2

FW: [log] Is there a way to copy the initial log of a rolling log set
by Marc F. Houde 02 Apr '15

02 Apr '15

Greetings, I am using boost::log with a text_file_backend sink with file rotation for logging on a long running application. I have set it up to clear earlier logs when the logging directory reaches a certain size, but I would like to preserve the initial log as it contains useful configuration information that may not be repeated in later logs. I thought I might be able to do this using set_close_handler, and making a copy but there does not appear to be a way to get the actual file information. Thanks, Marc [ASG]<http://www.asg.com/> Marc Houde, Sr Software Engineer marc.houde(a)asg.com<mailto:marc.houde@asg.com> | 703.464.1624 www.asg.com<http://www.asg.com/> | 800.333.8666 USA Only Facebook<https://www.facebook.com/ASGSoftwareSolutions> | LinkedIn<https://www.linkedin.com/company/asg> | Twitter<https://twitter.com/#!/asgsoftware> | YouTube<https://www.youtube.com/asgtech>

1 0

[boost][units] reciprocal conversion / inter unit conversion
by Matthias Wohlgemuth 02 Apr '15

02 Apr '15

Dear users, I just started to use boost::units for some simulations. However, I have some problems with unit conversions and I hope someone can help me. Let's say I have a quantity given in terms of energy in "electron volts" (eV) with the unit "energy". I defined the unit the following: BOOST_UNITS_DEFINE_BASE_UNIT_WITH_CONVERSIONS(si, electron_volts, "electron volts", "eV", PHYSICAL_CONSTANT_DVALUE(e), si::energy, 5000); namespace si { typedef make_system<electron_volts_base_unit>::type electron_volt_system; typedef unit<energy_dimension,si::electron_volt_system> electron_volt_type; BOOST_UNITS_STATIC_CONSTANT(eV,electron_volt_type); } where PHYSICAL_CONSTANT_DVALUE(e) gives me the double representation of si::constants::codata::e.value(). This works fine, for conversions like eV=>Joule etc. (By the way, is there a more straight forward way, to define non-rational scaled units, than defining a new unit sytem?) Now I want to convert eV to nanometers (wavelength) This is defined as: wavelength = c/frequency = h*c/energy (c=speed of light, h = Planck's constant) I would again define a system with the base unit of wavelength and the unit wavelength_type initialized e.g. with wavelength_nanometer. First Problem: What would be the derived dimension/unit: energy, length or a new dimension like wavelength_dimenson? If I would define it as something else than energy, I will have problems when using quantity<si::electron_volt_type>(x*si::wavelength_nanometer) or quantity<si::nanometer_type>(x*si::eV) Second problem: The relationship is reciprocal: wavelength ~ 1/energy. How do I define a proper conversion? Thanks for your help! Cheers, Matthias

1 0

Cross compiling boost 1.55 static libs
by Pham Ngoc Hai 01 Apr '15

01 Apr '15

Hi guys, I'm trying to cross compile boost for armhf but some of the functions seem to be missed.I'm using croos-tool ng, gcc-4.8 =================================For example in file system, boost::filesystem::detail::status is not there: nm stage/lib/linux_armv7/libboost_filesystem.a | grep status [returns nothing] ================================= I take a look on an existing ubuntu.14.04 armhf nm libboost_filesystem.a | grep status 00000048 t _ZN12_GLOBAL__N_113dir_itr_firstERPvS1_PKcRSsRN5boost10filesystem11file_statusES8_.isra.29.constprop.49 00001cf4 T _ZN5boost10filesystem6detail14symlink_statusERKNS0_4pathEPNS_6system10error_codeE 000019c0 T _ZN5boost10filesystem6detail6statusERKNS0_4pathEPNS_6system10error_codeE 00001b54 T _ZNK5boost10filesystem15directory_entry12m_get_statusEPNS_6system10error_codeE 00001e98 T _ZNK5boost10filesystem15directory_entry20m_get_symlink_statusEPNS_6system10error_codeE ================================= my project-config.jam: # Boost.Build Configuration # Automatically generated by bootstrap.sh import option ; import feature ; # Compiler configuration. This definition will be used unless # you already have defined some toolsets in your user-config.jam # file. #if ! gcc in [ feature.values <toolset> ] #{ using gcc : armhf : arm-unknown-linux-gnueabi-g++ : <compileflags>-fexpensive-optimizations <compileflags>-O3 <compileflags>-march=armv7-a <compileflags>-mtune=cortex-a9 <compileflags>-mfpu=neon <compileflags>-mfloat-abi=hard <compileflags>-ftree-vectorize <compileflags>-ffast-math <compileflags>-funsafe-math-optimizations <compileflags>-pipe <compileflags>-fwhole-program <compileflags>-fpermissive <compileflags>-fPIC ; #} project : default-build <toolset>gcc ; # Python configuration using python : 2.7 : ; # List of --with-<library> and --without-<library> # options. If left empty, all libraries will be built. # Options specified on the command line completely # override this variable. libraries = ; # These settings are equivivalent to corresponding command-line # options. option.set prefix : /usr/local ; option.set exec-prefix : /usr/local ; option.set libdir : /usr/local/lib ; option.set includedir : /usr/local/include ; # Stop on first error option.set keep-going : false ; ================================= I use this patch to fix the zlib problem in boost_1.55 cat no_zlib.diff Index: libs/iostreams/build/Jamfile.v2 --- libs/iostreams/build/Jamfile.v2 (revision 6521) +++ libs/iostreams/build/Jamfile.v2 (working copy) @@ -159,8 +159,6 @@ : $(sources) : <link>shared:<define>BOOST_IOSTREAMS_DYN_LINK=1 <define>BOOST_IOSTREAMS_USE_DEPRECATED - [ ac.check-library /zlib//zlib : <library>/zlib//zlib - <source>zlib.cpp <source>gzip.cpp ] : : <link>shared:<define>BOOST_IOSTREAMS_DYN_LINK=1 ; ================================= my b2 command: ./b2 link=static threading=multi --tool-set=gcc-armhf --without-python -sNO_COMPRESSION=1

2 2

[Graph] Reserving graph memory (again)
by Sensei 01 Apr '15

01 Apr '15

Dear all, Reading all the documentation online about memory reservation in a graph, I am still wondering if it would be possible to reserve memory in advance. With a vecS container it would be quite an advantage to reserve memory, but let me be clear, I am not saying that I know the number of edges in advance, so CRS isn't an option. Until now I know of two ways to do this. The first is to add & remove an edge: add_edge(0, num_vertices(g) + list.size() - 1, g); remove_edge(0, num_vertices(g) + list.size() - 1, g); however, it won't work in my context since I could (as you see from the code) add edges to an existing graph, and I am getting weird results. I am sure this is due to my code, however, add/remove isn't really a neat solution. The second option is weird: g.m_vertices.resize(list.size() - 1); This could be used, but m_* members should, as far as I understand, be private or protected. Is there any other nice possibility? For instance, a static function in the traits that reserves memory? In case, why this cannot be done by BGL APIs? Thanks!

1 0

[asio]
by georg＠schorsch-tech.de 31 Mar '15

31 Mar '15

Hi all, currently i try to understand boost asio a little better. Right now, i just had a very simple asio program and started 2 timers asyncronously. i expected the timer t to complete after the timer i. //-------<----------------- Current output: 10 s. 1 s. //-------<----------------- Expected output: 1 s. 10 s. //-------<----------------- Shouldn't complete the async_wait with 1 sec complete prior the 10 sec async_wait? I am on Windows 7 x64/ MSVC 2013(VS12) / Boost 1.57.0. Regards Georg //-------<----------------- #include <boost/asio.hpp> #include <boost/system/error_code.hpp> #include <iostream> void wait_handler(const boost::system::error_code &ec) { if (!ec) std::cout << "10 s." << std::endl; } void irq_handler(const boost::system::error_code &ec) { if (!ec) std::cout << "1 s." << std::endl; } int main() { boost::asio::io_service io_service; boost::asio::deadline_timer t(io_service, boost::posix_time::seconds(10)); boost::asio::deadline_timer i(io_service, boost::posix_time::seconds(1)); t.async_wait(&wait_handler); t.async_wait(&irq_handler); io_service.run(); } //-------<-----------------

3 2

Serialization cumulatively.
by Tony Camuso 30 Mar '15

30 Mar '15

I'm trying to serialize the data from multiple passes of an app on various files. Each pass generates data that must be serialized. If I simply append each serialization, then deserialization will only occur for the first instance, since the number of records read by the deserialization will only be for the first instance. What I'm doing is deserializing on each new pass, deleting the original file, and then serializing everything again with the new information. If there were only a few files to process, this would not be a problem. However there are thousands of files. Additionally, on each new pass, I am checking to see if a certain type of record has already been saved. So, with every pass, I must look up in a deeper and deeper database. Currently, it's taking almost an hour to process about 3000 files, with an average of 55,000 lines per file. It is a huge amount of data. However, I'm looking for a way to reduce the length of time it takes to do this processing. Does anybody have a better idea than to cycle through the serialize-deserialize-lookup-serialize sequence for each file?

5 14

gicatena
by gicatena 29 Mar '15

29 Mar '15

Wei zio!, http://dronepromocodes.com/rwyw/nbfqqnawiivmwaqogeijytr.dkroguozxdavjgpqlor… 3/29/2015 3:11:42 AM

1 0

[gsoc15] Please help rank GSoC 2015 student projects
by Niall Douglas 27 Mar '15

27 Mar '15

Dear Boost Community, The Google Summer of Code 2015 proposals for Boost are in, and we would deeply appreciate the community's help in ranking the proposals according to merit before the 6th of April. To vote, the process is easy: 1. Go to this page https://www.google-melange.com/gsoc/homepage/google/gsoc2015 and click the "Log in" button under Mentors and Administrators. 2. Now click "Create Profile" on the same page. Note that even if you registered last year, you must register again in 2015. Fill in the form. Note that after submitting it drops you at "Edit Profile", which is confusing. 3. Click "My Dashboard", then "Connect with organisations". 4. Choose "Boost C++ Libraries". 5. In the message box, write this: "I am a member of the Boost community and the email(s) I normally post to boost mailing lists with is <email>" filling in the email address(es) you normally use to post to boost mailing lists. This lets us verify that you are indeed a long standing member of the Boost community. 6. Once we approve your request, you will get an email with the subject "Welcome as organisation member". You can now return to the Dashboard on the GSoC website where there will be a new item "Proposals". 7. Work your way through as many of the 33 proposals as you can. You can score them using the stars at the bottom of each proposal page, taking care to read any comments by the mentors and students if present. PLEASE try to rank some of the lowest scored proposals, every year we get a lot of people who only rank the top five and don't bother with the rest. Try to score on the priority basis of: (i) ability to write quality C++, using the programming competency test or samples of programming the student supplied. (ii) proposal quality and your best estimate of the student's understanding of how best to solve the problem at hand. Bear in mind a gifted programmer with a strong work ethic but poor English may appear to not understand the problem as well as native English speakers, this is why we have asked for examples of their programming competency. (iii) if the student came early to the mailing lists to ask for help writing the proposal (the mentors who helped them with their proposals have usually indicated this in the private comments). (iv) usefulness/appropriateness of the feature or work being proposed. Remember a good GSoC is more about getting promising new engineers into Boost and C++ than necessarily getting code to pass Boost peer review in a single summer. 8. Optional: If a proposal looks especially great to you and you feel able to mentor a student this year, please slide the "wish to mentor" button. Just because a proposal already has willing mentors does NOT mean you should not add yourself - if you can substitute for an existing mentor, that may mean we use that mentor for another proposal. As you know, Google Summer of Code is usually worth $42,000 - $48,000 to Boost each year, and a successful GSoC raises our visibility and reputation in the wider open source community. Our thanks to you in advance for taking the time to vote. Niall Douglas Boris Schäling --- Boost C++ Libraries Google Summer of Code 2015 admin https://svn.boost.org/trac/boost/wiki/SoC2015

1 0

problems using boost::polygon::get_rectangles
by TomDrummond 27 Mar '15

27 Mar '15

Hello I'm trying to use the function get_rectangles to return a list of rectangles however I can' get the code to compile. code #include <boost/polygon/polygon.hpp> std::vector< boost::polygon::rectangle_data<int> > rects; typedef boost::polygon::polygon_90_with_holes_data<int> Polygon90; Polygon90 poly; typedef boost::polygon::polygon_traits<Polygon90>::point_type MyPoint; MyPoint pts[] = { boost::polygon::construct<MyPoint>(0, 0), boost::polygon::construct<MyPoint>(0, 10), boost::polygon::construct<MyPoint>(30, 10), boost::polygon::construct<MyPoint>(30, 20), boost::polygon::construct<MyPoint>(10, 20), boost::polygon::construct<MyPoint>(10, 0) }; boost::polygon::set_points(poly, pts, pts + 6); boost::polygon::get_rectangles(rects, poly ); which gives the error 1>c:\lib\boost\1.57.0\boost\polygon\detail/rectangle_formation.hpp(261): error C2784: 'boost::rational<IntType> boost::abs(const boost::rational<IntType> &)' : could not deduce template argument for 'const boost::rational<IntType> &' from 'int' 1> C:\lib\boost\1.57.0\boost/rational.hpp(104) : see declaration of 'boost::abs' 1> c:\lib\boost\1.57.0\boost\polygon\polygon_90_set_data.hpp(180) : see reference to function template instantiation 'void boost::polygon::form_rectangles<output_container,std::_Vector_iterator<std::_Vector_val<std::_Simple_types<std::pair<int,std::pair<int,int>>>>>,boost::polygon::rectangle_concept>(output_container &,iterator_type,iterator_type,boost::polygon::orientation_2d,rectangle_concept)' being compiled 1> with 1> [ 1> output_container=std::vector<boost::polygon::rectangle_data<int>,std::allocator<boost::polygon::rectangle_data<int>>> 1> , iterator_type=std::_Vector_iterator<std::_Vector_val<std::_Simple_types<std::pair<int,std::pair<int,int>>>>> 1> , rectangle_concept=boost::polygon::rectangle_concept 1> ] 1> c:\lib\boost\1.57.0\boost\polygon\polygon_90_set_concept.hpp(86) : see reference to function template instantiation 'void boost::polygon::polygon_90_set_data<int>::get_rectangles<output_container_type>(output_container &) const' being compiled 1> with 1> [ 1> output_container_type=std::vector<boost::polygon::rectangle_data<int>,std::allocator<boost::polygon::rectangle_data<int>>> 1> , output_container=std::vector<boost::polygon::rectangle_data<int>,std::allocator<boost::polygon::rectangle_data<int>>> 1> ] 1> c:\lib\boost\1.57.0\boost\polygon\polygon_90_set_concept.hpp(86) : see reference to function template instantiation 'void boost::polygon::polygon_90_set_data<int>::get_rectangles<output_container_type>(output_container &) const' being compiled 1> with 1> [ 1> output_container_type=std::vector<boost::polygon::rectangle_data<int>,std::allocator<boost::polygon::rectangle_data<int>>> 1> , output_container=std::vector<boost::polygon::rectangle_data<int>,std::allocator<boost::polygon::rectangle_data<int>>> 1> ] 1> TerrainDispatcher.cpp(185) : see reference to function template instantiation 'void boost::polygon::get_rectangles<std::vector<boost::polygon::rectangle_data<int>,std::allocator<_Ty>>,Polygon90>(output_container_type &,const polygon_set_type &)' being compiled 1> with 1> [ 1> _Ty=boost::polygon::rectangle_data<int> 1> , output_container_type=std::vector<boost::polygon::rectangle_data<int>,std::allocator<boost::polygon::rectangle_data<int>>> 1> , polygon_set_type=Polygon90 1> ] I'm quite new to both boost and templates so any help would be appreciated. -- View this message in context: http://boost.2283326.n4.nabble.com/problems-using-boost-polygon-get-rectang… Sent from the Boost - Users mailing list archive at Nabble.com.

1 0

[geometry] Buffer multi-linestring with different distances
by Renato Silveira 26 Mar '15

26 Mar '15

Is it possible to buffer a multi-linestring where each linestring has his own distance to buffer? Something like this: http://docs.qgis.org/2.2/en/_images/variable_buffer.png Thank you in advance -- *Renato Silveira* Ph. D. Student Informatics Institute - UFRGS Porto Alegre - RS - Brazil http://www.inf.ufrgs.br/~rsilveira

3 4

[Serialization] serialization of shared_ptr with custom deleter
by Elizabeta 26 Mar '15

26 Mar '15

Hi I am using boost 1.49. There is problem with serialization of shared_ptr with custom deleter, it doesnot preserve the deleter. After deserialization of shared_ptr with custom deleter, when using boost::get_deleter on the deserialized shared_ptr it returns null. Here is code example struct DetachTest { ~DetachTest() { int debug =0; } friend class boost::serialization::access; template<class Archive> inline void serialize(Archive & ar, const unsigned int file_version) { } }; { boost::shared_ptr<DetachTest> ss(new DetachTest,SmartDeleter<DetachTest>()); std::ofstream ofs("C:\\detach.xml"); boost::archive::xml_oarchive oa(ofs); oa & boost::serialization::make_nvp("detach",ss); } { DetachTest* test = 0; boost::shared_ptr<DetachTest> ss (test,SmartDeleter<DetachTest>()); //del is nonnul here SmartDeleter<DetachTest>* del = boost::get_deleter<SmartDeleter<DetachTest> , DetachTest>(ss); std::ifstream ifs("C:\\detach.xml"); boost::archive::xml_iarchive ia(ifs); ia & boost::serialization::make_nvp("detach",ss); //de2 is null after deserialization SmartDeleter<DetachTest>* de2 = boost::get_deleter<SmartDeleter<DetachTest> , DetachTest>(ss); } -- View this message in context: http://boost.2283326.n4.nabble.com/Serialization-serialization-of-shared-pt… Sent from the Boost - Users mailing list archive at Nabble.com.

2 1

Cannot build libboost_mpi.so
by Patrick Begou 25 Mar '15

25 Mar '15

Hi, I'm a new user of boost library, as it is requested by fellpp that I'm trying to install. I'm compiling boost 1.57 with the basic commands: tar xvfz boost_1_57_0.tar.gz cd boost_1_57_0 ./bootstrap.sh --prefix=/share/apps/boost_1_57_0-GCC48 ./b2 But I never get the requested libboost_mpi.so ? Even if the begining of the script tells me: Component configuration: - atomic : building - chrono : building - container : building - context : building - coroutine : building - date_time : building - exception : building - filesystem : building - graph : building - graph_parallel : building - iostreams : building - locale : building - log : building - math : building - mpi : building ...... and libboost_mpi.so is requested for Fellpp.... Thanks for your advices. Patrick -- =================================================================== | Equipe M.O.S.T. | | | Patrick BEGOU | mailto:Patrick.Begou@grenoble-inp.fr | | LEGI | | | BP 53 X | Tel 04 76 82 51 35 | | 38041 GRENOBLE CEDEX | Fax 04 76 82 52 71 | ===================================================================

2 2

Re: [Boost-users] [asio] wrap lambda async_receive call
by Cheng Mo 25 Mar '15

25 Mar '15

Hi Gravin: >The compiler will build the code for a lambda only once regardless of >how many times it's called. But it also won't let you create a >recursive lambda, which is what you would need if you wanted to have a >read operation repeat itself when it completes (which is the most common >case). I supposed that which would be built once durning compiling time but multi time in running time, wasn't it ? It will implement every time when async_xxx be invoded. Although I was not do test for proving that. >Well, actually that's not quite true -- you can type-erase a lambda via >std::function or similar and then call it recursively. But AFAIK you >can only do this when capturing by reference, and you can't safely do >that with a locally declared lambda when making async calls. So it's >not really useful in this context. Private member function or std::function type various and transmitted as reference could be better in this case. >> It's better that build a function object in static. What do you think ? >Function objects have a similar lifetime issue, and making one static is >potentially dangerous if you could have multiple operations or >connections running concurrently. It's usually simplest to use a >private method of the containing class, which is what most of the >example code does. You are right, the static is dangerous in multiple op and concurrence, Thanks. (If you really want to hide it from clients of your class, then use the PIMPL idiom.) Cheer~ 程墨 PBI―北京加维通讯电子技术有限公司地址：北京市海淀区西北旺镇丰智东路3号院邮编：100094 Mail: mcheng(a)pbicn.com

1 0

[Boost Graph Library][Serialization] adjacency_list serialization crashes.
by Hardik Soni 23 Mar '15

23 Mar '15

Hi All, I am facing a core dump while serializing adjacency_list class object of BGL. I am using <boost/graph/adj_list_serialize.hpp> file for serialization. Following is the stack trace. I have highlighted the types used for boost::adjacency_list on frame number 19. I am using bundled property method to assign property to nodes and vertices. I tried with no_poperty, the outcome was the same. Does anyone have any idea, why is it crashing? The exception name is "output stream error". #0 0x0000003908e359e9 in raise () from /lib64/libc.so.6 #1 0x0000003908e370f8 in abort () from /lib64/libc.so.6 #2 0x000000390d660565 in __gnu_cxx::__verbose_terminate_handler() () from /lib64/libstdc++.so.6 #3 0x000000390d65e6c6 in ?? () from /lib64/libstdc++.so.6 #4 0x000000390d65e6f3 in std::terminate() () from /lib64/libstdc++.so.6 #5 0x000000390d65e91f in __cxa_throw () from /lib64/libstdc++.so.6 #6 0x000000000040de72 in boost::serialization::throw_exception<boost::archive::archive_exception> (e=...) at /usr/local/include/boost/serialization/throw_exception.hpp:36 #7 0x000000000040dce7 in boost::archive::basic_text_oprimitive<std::ostream>::save_impl<int> (this=0x7fffffffd5b0, t=@0x7fffffffd188: 6) at /usr/local/include/boost/archive/basic_text_oprimitive.hpp:122 #8 0x000000000040dc24 in boost::archive::basic_text_oprimitive<std::ostream>::save<int> (this=0x7fffffffd5b0, t=@0x7fffffffd188: 6) at /usr/local/include/boost/archive/basic_text_oprimitive.hpp:176 #9 0x000000000040db91 in boost::archive::xml_oarchive_impl<boost::archive::xml_oarchive>::save<int> (this=0x7fffffffd580, t=@0x7fffffffd188: 6) at /usr/local/include/boost/archive/xml_oarchive.hpp:75 #10 0x000000000040daeb in boost::archive::save_access::save_primitive<boost::archive::xml_oarchive, int> (ar=..., t=@0x7fffffffd188: 6) at /usr/local/include/boost/archive/detail/oserializer.hpp:88 #11 0x000000000040d9d1 in boost::archive::detail::save_non_pointer_type<boost::archive::xml_oarchive>::save_primitive::invoke<int> (ar=..., t=@0x7fffffffd188: 6) at /usr/local/include/boost/archive/detail/oserializer.hpp:232 #12 0x000000000040d595 in boost::archive::detail::save_non_pointer_type<boost::archive::xml_oarchive>::invoke<int> (ar=..., t=@0x7fffffffd188: 6) at /usr/local/include/boost/archive/detail/oserializer.hpp:308 #13 0x000000000040cccb in boost::archive::save<boost::archive::xml_oarchive, int const> (ar=..., t=@0x7fffffffd188: 6) at /usr/local/include/boost/archive/detail/oserializer.hpp:525 #14 0x000000000040c678 in boost::archive::detail::common_oarchive<boost::archive::xml_oarchive>::save_override<int const> (this=0x7fffffffd580, t=@0x7fffffffd188: 6) at /usr/local/include/boost/archive/detail/common_oarchive.hpp:69 #15 0x000000000040be67 in boost::archive::basic_xml_oarchive<boost::archive::xml_oarchive>::save_override<int> (this=0x7fffffffd580, t=...) at /usr/local/include/boost/archive/basic_xml_oarchive.hpp:112 #16 0x000000000040b5bc in boost::archive::detail::interface_oarchive<boost::archive::xml_oarchive>::operator<< <boost::serialization::nvp<int> const> (this=0x7fffffffd580, t=...) at /usr/local/include/boost/archive/detail/interface_oarchive.hpp:63 #17 0x000000000040b021 in boost::serialization::save<boost::archive::xml_oarchive, boost::vecS, boost::vecS, boost::directedS, std::string, std::string, std::string, boost::listS> (ar=..., graph=...) at /usr/local/include/boost/graph/adj_list_serialize.hpp:48 #18 0x000000000040aa65 in boost::serialization::free_saver<boost::archive::xml_oarchive, boost::adjacency_list<boost::vecS, boost::vecS, boost::directedS, std::string, std::string, std::string, boost::listS> >::invoke (ar=..., t=..., file_version=0) at /usr/local/include/boost/serialization/split_free.hpp:45 #19 0x000000000040a6e2 in boost::serialization::split_free<boost::archive::xml_oarchive, boost::adjacency_list<boost::vecS, boost::vecS, boost::directedS, std::string, std::string, std::string, boost::listS > > (ar=..., t=..., file_version=0) at /usr/local/include/boost/serialization/split_free.hpp:74 #20 0x000000000040a2cf in boost::serialization::serialize<boost::archive::xml_oarchive, boost::vecS, boost::vecS, boost::directedS, std::string, std::string, std::string, boost::listS> (ar=..., graph=..., file_version=0) at /usr/local/include/boost/graph/adj_list_serialize.hpp:109 Thanks, Hardik Soni

1 0

try_numeric_convert (akin to try_lexical_convert)
by Chris Franz 23 Mar '15

23 Mar '15

We're using the new try_lexical_convert function in our code so we can encapsulate errors in the standard manner used in our project. A counterpart for numeric_cast would be useful. Is any such thing in the works?

2 1