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[1.61.0] building with Clang and c++11
by Richard Hadsell 02 Jul '16

02 Jul '16

I have downloaded 1.61.0 and want to build it with Clang. This is in my user-config: using clang : 3.5.0 : /netDISKS/master/netmt/LINUX_C65/app/clang/3.5.0/bin/clang++ : <compileflags>"-fPIC -gcc-toolchain /netDISKS/master/netmt/LINUX_C65/app/gcc/4.8.3 -Wno-overloaded-virtual -Wno-unused-function -Wno-unused-variable -Wno-c99-extensions -Wno-variadic-macros" <linkflags>"-fPIC -gcc-toolchain /netDISKS/master/netmt/LINUX_C65/app/gcc/4.8.3" ; When I build, I see warnings like these: ./boost/mpl/print.hpp:50:19: warning: in-class initialization of non-static data member is a C++11 extension [-Wc++11-extensions] const int m_x = 1 / (sizeof(T) - sizeof(T)); ^ ./boost/timer/timer.hpp:44:43: warning: 'long long' is a C++11 extension [-Wc++11-long-long] void clear() { wall = user = system = 0LL; } ^ ./boost/regex/v4/instances.hpp:124:34: warning: unknown warning group '-Wkeyword-macro', ignored [-Wunknown-pragmas] #pragma clang diagnostic ignored "-Wkeyword-macro" ^ When I add '-std=c++11' to the <compileflags> and <linkflags>, I get errors and warnings like these: clang-linux.compile.c.without-pth bin.v2/libs/container/build/clang-linux-3.5.0/release/instruction-set-core2/link-static/threading-multi/alloc_lib.o error: invalid argument '-std=c++11' not allowed with 'C/ObjC' "/netDISKS/master/netmt/LINUX_C65/app/clang/3.5.0/bin/clang++" -c -x c -O3 -Wno-inline -Wall -std=c++11 -fPIC -gcc-toolchain /netDISKS/master/netmt/LINUX_C65/app/gcc/4.8.3 -Wno-overloaded-virtual -Wno-unused-function -Wno-unused-variable -Wno-c99-extensions -Wno-variadic-macros -march=core2 -pthread -m64 -DBOOST_ALL_NO_LIB=1 -DBOOST_CONTAINER_STATIC_LINK=1 -DNDEBUG -I"." -c -o "bin.v2/libs/container/build/clang-linux-3.5.0/release/instruction-set-core2/link-static/threading-multi/alloc_lib.o" "libs/container/src/alloc_lib.c" libs/locale/src/shared/localization_backend.cpp:54:22: warning: 'auto_ptr' is deprecated [-Wdeprecated-declarations] std::auto_ptr<localization_backend> res(new actual_backend(backends,default_backends_)); ^ ./boost/regex/v4/instances.hpp:124:34: warning: unknown warning group '-Wkeyword-macro', ignored [-Wunknown-pragmas] #pragma clang diagnostic ignored "-Wkeyword-macro" ^ What options do I need to add or remove to build and use boost with no errors and as few warnings as possible? -- Dick Hadsell 203-992-6320 Fax: 203-992-6001 Reply-to: hadsell(a)blueskystudios.com Blue Sky Studios http://www.blueskystudios.com 1 American Lane, Greenwich, CT 06831-2560

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New library? CallableTraits
by Barrett Adair 01 Jul '16

01 Jul '16

I posted about this a month ago, but I did not receive much response. Since then, I added an extended example use case, and I added a documentation section [1] that compares CallableTraits and Boost.FunctionTypes. I received some positive feedback this week in Aspen, and r/cpp also seemed to respond well [2], so I thought I'd give this another shot. Here are my questions for you: 1. Is there any interest in reviewing a future version of this for inclusion in Boost? 2. If so, does this belong in its own library, or should it be incorporated into Boost.TypeTraits or something similar? 3. What you like to see added, removed, renamed, or redesigned? I'd say CallableTraits is about 85% finished. Here's what's left: * Add INVOKE semantics to a couple of things for consistency (arity, etc) * Remove unused/undocumented code * Account for transaction_safe and C++17 noexcept * Finish/test the calling convention features * Finish/update the reference documentation * Write even more tests Cheers, Barrett [1] http://badair.github.io/callable_traits/doc/html/index.html#callable_traits… [2] https://www.reddit.com/r/cpp/comments/4ffmfs/callabletraits_never_write_ano… GitHub: https://github.com/badair/callable_traits Documentation from the top: http://badair.github.io/callable_traits/doc/html/index.html (reference section under construction)

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[build] Running 1 per N tests
by Adam Wulkiewicz 30 Jun '16

30 Jun '16

Hi, At Boost.Geometry we're using CircleCI for testing. They allow to run the tests concurently on N virtual machines. I'd like to alter my script to automatically redistribute the tests evenly across all of the machines, i.e. to run 1/N of the tests on each machine. The problem is that at Boost.Geometry we have a lot of nested project directories, i.e. b2 executed for some upper directory runs the tests in the test-suite in this directory and then follows nested projects defined by build-project directives, so runs the tests recursively. So e.g. if b2 was executed on some virtual machine for the most-top-level directory all of the tests would be built anyway. Do you have an idea how this could be solved without altering the tests structure? Is it currently somehow possible (though AFAIK it isn't) or would be possible to implement options allowing to e.g.: - run b2 only for a certain directory/Jamfile, e.g. --non-recursive - ignore arbitrary Jamfile directive, e.g. --ignore-build-project - run only 1 per N tests, an option used together with -jX but running tests only for one thread, e.g. b2 -i2 -j4 running only 1 per 4 commands starting from 2nd command ? The last option would be the most convenient for me. The tests would be divided as evenly as possible. It wouldn't require to use some workarounds i.e. traversing test directories recursively and running b2 manually for them which could result in low-quality redistribution, e.g. if some directory contained many tests and other small number of tests. Regards, Adam

2 2

boost regression run.py fails with, fatal: Not a git repository
by Blower, Melanie 29 Jun '16

29 Jun '16

I'm trying to run.py on develop to report results with the Intel compiler. The script I use first downloads run.py. The git is failing partway through with this message Cloning into 'tools/quickbook'... Submodule path 'tools/quickbook': checked out 'c7cb99ac029593024f3f31a1ab2503820f1300d5' # Cleaning up "/localext3/mblower/sandbox/_try_dev/boost_root/bin" directory ... # Cleaning up "/localext3/mblower/sandbox/_try_dev/boost_root/bin.v2" directory ... # Cleaning up "/localext3/mblower/sandbox/_try_dev/results" directory ... # Getting sources (2016-06-29T12:24:07Z)... # Executing GIT command: /localext3/mblower/sandbox/_try_dev/boost_root> git submodule foreach "cd $toplevel && git submodule deinit $path" Entering 'libs/accumulators' fatal: Not a git repository (or any parent up to mount point /localext3) Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set). Stopping at 'libs/accumulators'; script returned non-zero status. # git_source_checkout failed with message "GIT command "git submodule foreach "cd $toplevel && git submodule deinit $path"" failed with code 256" I'm using a new server, the "master" results completed successfully last night. There's plenty of disk space. Any ideas?

2 1

[boost-git] fiber not contained?
by Oliver Kowalke 29 Jun '16

29 Jun '16

Hi, I was asked several times why boost.fiber is not contained if boost's git-repo is cloned with git clone --recursive http://github.com/boostorg/boost.git. I'm wondering because boost.fiber is already included in the regression tests (master/develop). Oliver

4 8

Attention library authors.. Library requirements testing is now active.
by Rene Rivera 29 Jun '16

29 Jun '16

As part of continued efforts to move testing to CI, to facilitate release management, and to provide more information to authors I've now implemented some testing changes: 1. Most libraries are now tested automatically if they have a usable test directory. There are still libraries that do not follow the requirements of having all their tests in just the single test directory. You can see which ones those are here < https://github.com/boostorg/boost/blob/develop/status/Jamfile.v2#L101>. Library authors should IMMEDIATELY make changes to their test/Jamfile's to follow the library requirements for testing. Before the next release I plan to blindly remove that custom list of extra test targets. 2. Most structure library requirements are now checked both in the regular full testing and in the CI testing. I've implemented a script to check for most of the library directory structure and integration requirements. The script runs as an additional CI job, currently in Travis. Here's one of those jobs < https://travis-ci.org/boostorg/boost/jobs/137506433>. At the moment it reports 17 libraries as having errors. There are also some warnings, i.e. not requirement violations but just some stuff that may be wrong. The script also runs as part of the general full testing and any problems are reported in each library's results as a single entry at the top of the tables. Here's how one of the test failures looks like < http://tinyurl.com/zbe9gal> [1] [2]. It would be great if library authors address those errors in some form ASAP. I know that for some of those reported libraries there will need to be some discussions as to how to best address the errors. Feel free to start additional threads for those as needed. [1] < http://www.boost.org/development/tests/develop/developer/output/teeks99-09f… > [2] Note there are currently some false failures in this aspect from a build system "bug". The bug is already fixed but tests will take some time to cycle to reflect the bug fix. -- -- Rene Rivera -- Grafik - Don't Assume Anything -- Robot Dreams - http://robot-dreams.net -- rrivera/acm.org (msn) - grafikrobot/aim,yahoo,skype,efnet,gmail

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Query: ADL vs MSVC2013 support
by Soul Studios 28 Jun '16

28 Jun '16

I have transplanted the advance/next/prev/distance member functions into ADL non-member functions in a current unreleased version of colony (plflib.org) My question is whether MSVC2013 support for these functions is more important to the boost community than them being ADL. There's a bug in MSVC2013 (fixed in MSVC2015, never backported to MSVC2013) that causes a compiler crash under certain template configurations - unfortunately the way that the ADL has to be implemented (I have tried several methods) causes this bug. The workaround would be to disable these functions in MSVC2013 only, as everything works fine in MSVC2010, MSVC2015, Clang 3.6-3.8 (have not tested earlier) and GCC 4.6-5.1 (have not tested earlier).

1 1

message: Build #2 is still failing.
by Robert Ramey 26 Jun '16

26 Jun '16

I'm getting these messages on aregular basis. They point to the url https://travis-ci.org/boostorg/serialization/builds/140270355 I can see the utility of this. It seems that this is due to some requirement that I'm not fulfillng in the serialization library test directory.... or something. What, if anything, should I do about this. Robert Ramey

2 1

enabling constexpr with Visual studio 2015 Update 3 (RC)
by Paul A. Bristow 24 Jun '16

24 Jun '16

I am trying to use the enhanced constexpr features and have (perhaps unwisely) downloaded the latest Visual Studio Update 3 (RC) to get as great a chance of achieving this as possible. https://blogs.msdn.microsoft.com/vcblog/2015/12/02/constexpr-in-vs2015-upda… (and later posts) I am unsure what I need to do to ensure that the compiler is enabled for use the latest features. I have added /std:c++14 to the options of the property for the project. (aside I also tried /std:C++latest but that works for some tasks but failed to compile with odd-looking errors in converter.hpp Error C2518 keyword 'typename' illegal in base class list; ignored \modular-boost\boost\numeric\conversion\detail\converter.hpp 453 // Trivial Converter : used when (cv-unqualified) T == (cv-unqualified) S // template<class Traits> struct trivial_converter_impl : public std::unary_function< BOOST_DEDUCED_TYPENAME Traits::argument_type ,BOOST_DEDUCED_TYPENAME Traits::result_type > ,public dummy_range_checker<Traits> {...} So I stopped trying that /std:c++latest option. What else should it do?) Running the modular-boost/libs/config/config_info.cpp program BOOST_NO_CXX14_CONSTEXPR [no value] BOOST_CONSTEXPR [no value] BOOST_CONSTEXPR_OR_CONST =const BOOST_STATIC_CONSTEXPR =static const These don't seem to be what I think that I would expect (constexpr and static constexpr). I want especially to use BOOST_STATIC_CONSTEXPR to get static constexpr. Do I need to also add #define BOOST_CXX14_CONSTEXPR in my program or elsewhere? (Doing this doesn't change BOOST_CONSTEXPR_OR_CONST from const to constexpr) Thanks for any suggestions. Paul --- Paul A. Bristow Prizet Farmhouse Kendal UK LA8 8AB +44 (0) 1539 561830

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[typeof] Pull requests
by Adam Wulkiewicz 23 Jun '16

23 Jun '16

Hi, There are trivial pull requests in TypeOf waiting for merging (https://github.com/boostorg/typeof/pulls) One of them is more than 2 yo. Would it be possible to merge them? At least #3 or #4 should be merged. Regards, Adam

1 0

Additional Test Configurations
by Tom Kent 22 Jun '16

22 Jun '16

About a month ago I got three new machines dedicated to testing boost online (thanks to Boost Community/Steering Committee/Conservancy!). These three machines are currently running tests along with a couple other machines that I have. Now that things are up and running, I'm looking for some community input as to how best utilize them. Here's the current setup: teeks99-01 - Ubuntu 14.04 + Docker - gcc-4.4 (master + develop) Docker precise + ubuntu-toolchain-r/test - gcc-4.5 (master + develop) Docker precise + ubuntu-toolchain-r/test - gcc-4.6 (master + develop) Docker precise + ubuntu-toolchain-r/test - gcc-4.7 (master + develop) Docker precise + ubuntu-toolchain-r/test - gcc-4.8 (master + develop) Docker trusty + ubuntu-toolchain-r/test - gcc-4.9 (master + develop) Docker trusty + ubuntu-toolchain-r/test - gcc-5 (master + develop) Docker trusty + ubuntu-toolchain-r/test - clang-3.0 (master + develop) Docker trusty + h-rayflood/llvm - clang-3.1 (master + develop) Docker trusty + h-rayflood/llvm - clang-3.2 (master + develop) Docker trusty + h-rayflood/llvm - clang-3.3 (master + develop) Docker trusty + ubuntu-toolchain-r/test - clang-3.4 (master + develop) Docker trusty + ubuntu-toolchain-r/test - clang-3.5 (master + develop) Docker trusty + ubuntu-toolchain-r/test - clang-3.6 (master + develop) Docker trusty - clang-3.7 (master + develop) Docker trusty + llvm.org/apt teeks99-02 - Ubuntu 16.04 + Docker - gcc-4.4 (master + develop) Docker precise + ubuntu-toolchain-r/test - gcc-4.5 (master + develop) Docker precise + ubuntu-toolchain-r/test - gcc-4.6 (master + develop) Docker precise + ubuntu-toolchain-r/test - gcc-4.7 (master + develop) Docker precise + ubuntu-toolchain-r/test - gcc-4.8 (master + develop) Docker trusty + ubuntu-toolchain-r/test - gcc-4.9 (master + develop) Docker trusty + ubuntu-toolchain-r/test - gcc-5 (master + develop) Docker trusty + ubuntu-toolchain-r/test - clang-3.0 (master + develop) Docker trusty + h-rayflood/llvm - clang-3.1 (master + develop) Docker trusty + h-rayflood/llvm - clang-3.2 (master + develop) Docker trusty + h-rayflood/llvm - clang-3.3 (master + develop) Docker trusty + ubuntu-toolchain-r/test - clang-3.4 (master + develop) Docker trusty + ubuntu-toolchain-r/test - clang-3.5 (master + develop) Docker trusty + ubuntu-toolchain-r/test - clang-3.6 (master + develop) Docker trusty - clang-3.7 (master + develop) Docker trusty + llvm.org/apt teeks99-03 - Ubuntu 16.04 + Docker - gcc-5 (develop) Docker trusty + ubuntu-toolchain-r/test - clang-3.7 (develop) Docker trusty + llvm.org/apt teeks99-05 - Ubuntu 14.04 (Azure VM) - gcc-4.8 (master) - clang-3.4 (master) teeks99-08 - Windows 2012 (KVM VM) - msvc-8.0 (master + develop) SP1 - msvc-9.0 (master + develop) SP1 - msvc-10.0 (master + develop) SP1 - msvc-11.0 (master + develop) Update 4 - msvc-12.0 (master + develop) Update 5 - msvc-14.0 (master + develop) Update 2 teeks99-09 - Windows 2012 (KVM VM) - msvc-8.0 (master + develop) SP1 - msvc-9.0 (master + develop) SP1 - msvc-10.0 (master + develop) SP1 - msvc-11.0 (master + develop) Update 4 - msvc-12.0 (master + develop) Update 5 - msvc-14.0 (master + develop) Update 2 I'm currently working on getting gcc-6 and clang 3.8, sorry they aren't in the list yet. I'm planning to retire the teeks99-01 shortly and converting the ancient teeks99-05 to something newer, still doing boost testing. All these configurations and the scripts that keep them cycling are on github at: https://github.com/teeks99/boost-build For each platform there are a couple configurations that I try to run frequently to give 'rapid' results as developers are committing code. The configurations for windows are set so that every few runs it will run the msvc-12.0 (develop) test, so that is never more than ~10hrs old. Similarly on linux, the gcc-5 and clang-3.7 (develp) tests get run every few hours. Just to give a feeling of the timing, Linux runs take .75-3 hrs and Windows runs take 1.5-4hrs, depending on compiler, os, hardware, etc. All these configurations have minimal compiler options set. MSVC + GCC builds have no options set, clang has `<cxxflags>-Wno-c99-extensions`. >From a lot of the discussing I've seen on the lists, it seems that there's a lot of work going into C++ 11/14/1z development. I was thinking it would be good to add some of those switches. Which ones? How many? Baseline Standard -std=c++98 (I believe this is the default for all the g++/clang++ instances above) -std=c++11/0x -std=c++14/1y -std=c++1z GNU Standard -std=gnu++98 -std=gnu++11/0x -std=gnu++14/1y -std=gnu++1z Clang Library -stdlib=libc++ -stdlib=libstdc++ Optimization -O2? Warnings -Wall -Wextra Others? I'm guessing that most of these will be of interest to at least a small subset of developers. There probably isn't a need to apply all possible combinations to all possible compilers however. (Not to mention that it would make the results matrix even more overwhelming.) Which combinations are important for you to see in the matrix? What do you think should be the 'rapid' configurations? I'm also thinking about additional compilers (in addition to gcc-6/clang-3.9 mentioned above), though these will take a bit of work on my part, so will only get implemented as I have time available. - gcc HEAD from GIT - clang HEAD from GIT - cygwin/gcc - mingw - clang on windows - Other? Thanks in advance for your input! Tom

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[boost.process] 0.6 Alpha
by Klemens Morgenstern 21 Jun '16

21 Jun '16

Hi all, the boost.process 0.6 library is now in alpha, that is: it has some (compiling) examples, a documentation and tests that pass on windows as well as on linux. It basically allows you to manage a process like this: pstream pipe; child c("some_prog", "--some-arg", env["PATH"]+="C:/stuff", std_in < "data.csv", std_out > pipe, std_err > null, start_dir="./bin"); std::string data; pipe >> data; c.wait(); cout << c.exit_code() << endl; You can find the documentation here: http://klemens-morgenstern.github.io/process/ Get the source code from here: https://github.com/klemens-morgenstern/boost-process If you want to use it on windows, you currently would need to clone my boost.winapi fork also: https://github.com/klemens-morgenstern/winapi As for the scope of the library, it is meant to implement a small, portable layer to allow platform-independent process management. Thereby it's functionality is (unless I missed something) basically what is possible on posix as well as on windows. There are some platform extension, but I would not recommend to use them. It is also possible (though not yet documented) to write extensions, and if they work on both platforms I will gladly add them. It is however not the goal of the library, to be the be-all and end-all of process management; in past disscussions, different ideas where brought up, like implementing a DSEL for that or only allowing asynchronous communication. This library will never be that, since it would be much more fitting to build this on-top of it. E.g. a DSEL could be written (e.g. boost.shell) using boost.process underneath, so the library could concentrate only on the DSEL. It doesn't depend on boost.iostreams anymore, though it still uses boost.asio, boost.fusion and boost.filesystem. As for the open issues: some error handling is still lacking (but that'd be something like being unable to duplicate a handle), which would be required for proper extension, which is also why it's not documented. Also there's still an open discussion about the naming of the class and functions (child, system, spawn), so that may change also. But I consider this simple enough for a easy refactoring. If anyone has naming ideas, please tell me. One Idea was 'subprocess' but 'process::subprocess' just looks too strange to me. I hope you try it out, and give me some feedbacks. Or write angry error reports, both helps. Thanks! Klemens

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Checking interest in stacktrace library
by Antony Polukhin 21 Jun '16

21 Jun '16

Hi, I've got some prototype for getting stack traces: https://github.com/apolukhin/stacktrace It's design is based on the idea that class for stacktrace must be fully noexcept, without dynamic allocations in constructors and as simple as possible. Is there interest in it? What functionality would you like to have in it? -- Best regards, Antony Polukhin

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Re: [boost] proposed new library "histogram"
by Bjorn Reese 20 Jun '16

20 Jun '16

On 05/05/2016 12:21 AM, Hans Dembinski wrote: > https://github.com/HDembinski/histogram I suggest that you use non-intrusive serialization and place that in separate headers, so there is no dependency on Boost.Serialization unless you need it.

2 4

Checking interest in clang-{format, tidy} configurations
by jerry.c.t＠web.de 19 Jun '16

19 Jun '16

Hi, is there an interest for common boost clang-format and clang-tidy (only the module readability-identifier-naming) configurations to inforce consistent layout and naming style? For clang-format there are predefined styles like llvm, google etc. I think about adding a new predefined style 'boost' to clang-format. But first i would start with a separate _clang-format file. For clang-tidy there are no predefined styles thus i would simply create a _clang-tidy file. Best regards, Jerry

2 1

Feature request: variant::view
by TONGARI J 19 Jun '16

19 Jun '16

Hi, Sometimes we need to view a value as a variant and we don't want to copy the value into a variant. It'd be great if there's a variant::view that works like a variant but holds a reference to the value instead. The constructor should allow any reference to the types as in the variant, and a constructor that takes a reference to the variant, e.g. template<class T1, class T2...> class variant<T1, T2...>::view { view(T1&); view(T2&); ... view(variant&); }; And we can use apply_visitor/get on a view as on a variant. Thoughts? Thanks.

2 2

Boost's List of improvements
by Зайцев Александр 19 Jun '16

19 Jun '16

Hello. I will prepared Boost's list of improvements. I can realize it. Maybe, some algorithms I only can't find in Boost. And i think, that if i will implement algorithms from this list, it's will be great. Improvement list for Boost.Algorithm Boost.Algorithm(String) 1) Manacker's Algorithm: finding all palindromes in string O(N). 2) Different algortihms based on suffix arrays and suffix trees: Boost.Algorithm(Numbers) 1) Checking for number's simplicity by BPSW test. O(logN). 2) Effective factorization algorithms: Po, Po-1, Bents algo, Po-Monte-Carlo, Ferms algo. 3) Longest increasing subsequence Boost. Container 1) Modifications of queue and stack for searching min/max element with O(1). Maybe, I forgot something. -- Best regards, Zaitsev Alexander

1 0

Book
by Robert Ramey 18 Jun '16

18 Jun '16

I've attached an epub version of my "book". You should be able to just click on it and have the apple book reader popup and then be able to read it. The apple book reader has some interesting features. a) the book looks pretty good considering I didn't have to put to much effort into the formatting etc. b) For our purposes the best part is that you can easily annotate the book! There are three icons in the upper left corner. One to display the table of contents and other one for "notes" You can highlight text and add a note to it then save the book !. This is perfect as far as I'm concerned. Please don't spend time "copy editing" it. The whole thing needs to be gone over with a fine tooth comb with the idea of making the text more readable and clear, that the examples are in sync with the text, probably more narrative etc. etc. I'm really mostly concerned that the concepts are readable and explained to the target reader. Since I discovered the notion of semiring I understand the my C++ type algebra fulfills all the requirements of a semiring. And there is a large list of theorms which apply to semirings. I don't intend to add too much to the section, at least for now. It is very interesting but but right not it doesn't yet have a practical application. I'm hoping that will change but for now I it's as far as I want to go with this. This section will also need some work as far at the math is concerned. There are some issues with the notion of an inverse of a type etc which are still not really finished. But for now I think I've got the concepts outlined. It generates a book 60 pages long.

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Re: [boost] [Boost-users] Checking interest in stacktrace library
by Antony Polukhin 18 Jun '16

18 Jun '16

2016-06-18 17:49 GMT+03:00 Edward Diener <eldiener(a)tropicsoft.com>: > On 6/18/2016 6:34 AM, Antony Polukhin wrote: > >> Is there interest in it? >> What functionality would you like to have in it? >> > > Documentation is always helpful. > Yeep, that's currently missing :( If in short: namespace boost { namespace stacktrace { class stacktrace { public: BOOST_STATIC_CONSTEXPR std::size_t max_symbol_width = 256; typedef boost::array<char, max_symbol_width> frame_t; stacktrace() BOOST_NOEXCEPT; stacktrace(const stacktrace& bt) BOOST_NOEXCEPT; stacktrace& operator=(const stacktrace& bt) BOOST_NOEXCEPT; ~stacktrace() BOOST_NOEXCEPT; std::size_t size() const BOOST_NOEXCEPT; frame_t operator[](std::size_t frame) const BOOST_NOEXCEPT; }; template <class CharT, class TraitsT> std::basic_ostream<CharT, TraitsT>& operator<<(std::basic_ostream<CharT, TraitsT>& os, const stacktrace& bt); }} So you can construct stacktraces, copy them and output them to streams: std::cerr << stacktrace(); -- Best regards, Antony Polukhin

1 0

Library addition request
by Gerrit Daniels 18 Jun '16

18 Jun '16

Hello, I've written a library that implements automatic serialization of user defined types. You can find it here: https://github.com/gerritdaniels/ctrl. I was wondering if this is something that could be added to the boost library. Kind regards, Gerrit Daniels.

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Stand-alone Boost.Python
by Stefan Seefeld 18 Jun '16

18 Jun '16

Hello, I have started working on a new SCons-based build infrastructure for Boost.Python that allows the Boost.Python code to be compiled stand-alone against a pre-installed Boost. I have checked in a first version to the develop branch, and have enabled Travis-CI to use that. While this works reasonably well, and provides a much simpler workflow for developers wanting to contribute to Boost.Python, it isn't (yet) entirely feature-complete. Notably, running this on Windows (using MSVC) produces errors. I'd appreciate any help with this, especially from Windows users who are more familiar with MSVC than I am (that shouldn't be hard, given I have next to no experience with using MSVC :-) ). Building Boost.Python is now very simple: * clone the repo via `git clone https://github.com/boostorg/python.git` and switch to the 'develop' branch * configure a build via `scons config --python=... --boost-prefix=...` * build and test via `scons test` Hopefully this will make it much simpler to contribute and test patches, so we can work down the list of accumulated PRs and issues. (For avoidance of doubt: for the immediate future I have no intentions to replacing the official bjam-based build system. But once the new one has proven to be stable enough, I expect to actually build stand-alone releases for Boost.Python.) Thanks, Stefan -- ...ich hab' noch einen Koffer in Berlin...

1 0

Using Boost with VS 14.0 update 3 RC and Clang 3.8.0 (from CodeBlocks IDE) compile fails in MS type_traits is_assignable
by Paul A. Bristow 15 Jun '16

15 Jun '16

I am trying to check a program that compiles on VS with 14.0 update 3 RC and on Codeblocks IDE GCC 5.3 compile OK, but CodeBlocks Clang 3.8.0 fails: C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\type_traits:524:45: error: '_To' does not refer to a value : integral_constant<bool, __is_assignable(_To, _From)> I:\modular-boost\boost\mpl\aux_\preprocessed\plain\or.hpp|58|error: pasting formed 'BOOST_PP_TUPLE_ELEM_O_3(', an invalid preprocessing token [-Winvalid-token-paste] and terminally many more. clang++.exe -Wall -std=c++14 -m64 -fexceptions -O4 -m64 -std=c++14 -fms-extensions -Wall -m64 -fms-compatibility-version=19.00 -II:\modular-boost -c J:\Cpp\hellos\fixed_point_constexpr\fixed_point_constexpr.cpp -o obj\Release\fixed_point_constexpr.o I see some discussion of similar problem on https://groups.google.com/forum/#!topic/boost-list/MvqaK4SDy_c and a possible apparent fix on https://github.com/boostorg/type_traits/pull/24 Any suggestions for working around this problem? Paul PS I may try to use a *nix platform for this. --- Paul A. Bristow Prizet Farmhouse Kendal UK LA8 8AB +44 (0) 1539 561830

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[density] new library
by Giuseppe Campana 14 Jun '16

14 Jun '16

Hi to all, I'm working to density, a C++11 header-only library for heterogeneous containers and lifo memory management. It is not complete, but it is very close (and usable already). Just to avoid confusion, the test project of density contains a sub-module called testity, that in a near future will become a separate library. I'm wondering if it may become a valid proposal for a new library. In any case, any kind of feedback is welcome. Source code at https://github.com/giucamp/density Documentation at http://peggysansonetti.it/tech/density/html/index.html Regards, Giuseppe Campana.

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[property_tree] Quoting documentation
by alainm 13 Jun '16

13 Jun '16

Hi, I am using property_tree for a project, and I'd like to provide a description of the format. That text is exactly what I need: http://www.boost.org/doc/libs/1_61_0/doc/html/property_tree/parsers.html#pr… I am going to provide a link to the doc, but would need to insert the text into the documentation pdf too (some people actually still read paper). Is it possible and what kind of copyright text should I use ? Thanks Alain

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Start to contribute to Boost.
by Зайцев Александр 11 Jun '16

11 Jun '16

Hello. I very want to start contribute to Boost library. I want to help this project. And... maybe for start i can try to fix some bugs. Can you give me some pieces of advice, what i can do at start? Thanks. -- С уважением, Зайцев Александр.

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