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[Boost] Windows 10 Building/Testing
by Kyle Ketterer 30 Apr '15

30 Apr '15

Hey all, I was just curious if any devs/users have tried to compile/build on any of the Windows 10 preview releases and if there is a plan to support moving forward. I have been using Boost in various projects for 4-5 years and I am actually interested in getting involved in this project somehow. What is the most appropriate way to become involved? I really appreciate the skill level here and if anything would love the learning experience (learning from the best). Thanks

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[gsoc15] This year's GSoC students
by Niall Douglas 29 Apr '15

29 Apr '15

Dear Boost, It is our pleasure to announce this year's winning GSoC students and projects: 1. Damian Vicino Topic: Safe Float (boost::safe_numerics<float>) Mentor: Robert Ramey 2. Rajaditya Mukherjee Topic: Boost uBLAS EigenSolver Mentor: David Bellot 3. Anurag Ghosh Topic: Boost Document Library Mentor: Antony Polukhin 4. Nikhar Agrawal Topic: Boost.Fixed-Point Mentor: Paul A. Bristow 5. Benedek Thaler Topic: Enhanced vector and deque containers Mentor: Thorsten Ottosen 6. Louis Dionne Topic: Improved compile-time associative data structures for Hana Mentor: Joel Falcou 7. Jakub Szuppe Topic: Improving Boost.Compute Mentor: Kyle Lutz Congratulations to these students for passing an exceptionally tough contest this year, and our thanks to the above mentors for making themselves available. Finally, thank you Google for another year of funding and to those open source orgs who released duplicate students to us, we appreciate it! Niall and Boris --- Boost C++ Libraries Google Summer of Code 2015 admin https://svn.boost.org/trac/boost/wiki/SoC2015

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Updated library_status for easier use..
by Rene Rivera 29 Apr '15

29 Apr '15

Following up on the reorganization of the regression tools.. I'm happy to say that part of the changes I pushed last night include a cleaned up and easier to use library_status tool. Key changes, from the older version and the one Robert forked, are: * Processing the jam log (i.e. process_jam_log) is integrated into it. * Running b2 to build/run tests is also integrated into it (optionally). Which means that there's no external support script(s) needed and that it's fully cross-platform single executable. Documentation is updated at < https://rawgit.com/boostorg/regression/develop/index.html> on how to build it and on using it at < https://rawgit.com/boostorg/regression/develop/library_status/doc/library_s… >. Obviously improvements from others welcome (as PRs). HTH -- -- 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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[trac] Internal error
by Edward Diener 28 Apr '15

28 Apr '15

I logged into Boost trac and received: " Trac detected an internal error: OperationalError: database is locked There was an internal error in Trac. It is recommended that you notify your local Trac administrator with the information needed to reproduce the issue. To that end, you could a ticket. The action that triggered the error was: GET: /login"

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[regex] Change format of data in file
by Fu ji 28 Apr '15

28 Apr '15

Hello all, I have file output.txt, in file we can find something like: 01/01/2015 15:00:00 2222.2222 2222.2222 2222.2222 2222.2222 04/04/2015 15:00:00 2222.2222 and i would like to change format from DD/MM/RRRR HH:MM:SS to RRRR-MM-DD HH:MM:SS.000 using boost regex. But I have no clue how should I type pattern and replace them with another. Anyone have knowledge about boost regex and could help me ? Best regards

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[date_time] Ordering non-overlapping time period
by Arindam Mukherjee 28 Apr '15

28 Apr '15

The documentation for time_period suggests that for two periods tp1 and tp2, tp1 < tp2 if tp1.end() < tp2.begin() i.e. !tp1.intersects(tp2). http://www.boost.org/doc/libs/1_58_0/doc/html/date_time/posix_time.html#dat… But I can see that the following works: time_period tp1(second_clock:local_time(), hours(2)); time_period tp2(second_clock:local_time() + hours(1), hours(2)); assert(tp1.intersects(tp2)); assert(tp1 < tp2); The behavior seems legit - tp1.begin() < tp2.begin()/ The documentation says nothing about overlapping periods. Arindam

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[test] floating point comparison
by Emil Dotchevski 28 Apr '15

28 Apr '15

Hello, Can someone please tell me exactly what do I need to include and which namespace to use to get exact same behavior as: #include <boost/test/floating_point_comparison.hpp> bool check( float a, float b, float tolerance ) { using namespace boost::test_tools; return check_is_close(a,b,fraction_tolerance(tolerance)); } (The above used to work with older Boost versions but no longer.) Thanks, Emil

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[boost, config, context, log, 1.58] address-model and architecture detection
by Vladimir Prus 28 Apr '15

28 Apr '15

Hi, for some time on develop, top-level Jamroot used to deduce address-model and architecture from compiler. The only issue was that both properties would be added to targets paths when not necessary. Fix for that has been just committed, for develop: https://github.com/boostorg/boost/commit/945e3c0bbdd31ce8c297e0aff5340f0adb… and I performed these operations on master: - Merged all of Boost.Build changes: https://github.com/boostorg/build/commit/2e764707e03d25b6928501c25a717e195c… - Cherry-picked one Boost.Context change: https://github.com/boostorg/context/commit/9b392c68b59021aa4801dcb245bc64ad… - Cherry-picked one Boost.Log change: https://github.com/boostorg/log/commit/27a822a6b82f8bf34cbc681ac6583412bdf2… - Cherry-picked two root project changes and updated pointers to Context and Log: https://github.com/boostorg/boost/commit/e3bc35f7891e72ad74e57dc216db899d16… https://github.com/boostorg/boost/commit/beb53b6b9574f95309384bfc5afffb40d4… https://github.com/boostorg/boost/commit/b69a072401695c9978085158af4c1ea84c… With that, "./b2 -n" in up-to-date checkout of superproject works fine on Linux. Also, "./b2 -n --with-context --with-system" works fine, no address-model elements in path. Putting explicit address-model=64 does not change path. Putting explicit address-model=32 does add this element to path, as expected. Note that: - I did not merge any other Boost.Context or Boost.Log changes. - Nothing was required for Boost.Config, since it was merged earlier. I'd appreciate if people test current state of master branch, and report any concerns. Thanks, -- Vladimir Prus CodeSourcery / Mentor Embedded http://vladimirprus.com

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[afio] Compilation error in applications, including tests
by Brian Ravnsgaard Riis 27 Apr '15

27 Apr '15

Hi, I wanted to try out the proposed AFIO library, but I'm having trouble with compilation. I followed the instructions for inserting it into the boost checkout, by symlinking libs/afio to the AFIO checkout. Boost compilation happens correctly, including the AFIO library, however I get include failures on BindLib when I try to compile a test program. I then tried running the test suite, as per instructions: $ ./b2 libs/afio/test [snip] gcc.compile.c++.pch bin.v2/libs/afio/test/gcc-4.9.1/debug/threading-multi/test_functions.hpp.gch In file included from ./boost/afio/spinlock/include/boost/spinlock/concurrent_unordered_map.hpp:35:0, from ./boost/afio/config.hpp:341, from ./boost/afio/afio.hpp:41, from libs/afio/test/test_functions.hpp:17: ./boost/afio/spinlock/include/boost/spinlock/spinlock.hpp:81:36: fatal error: bindlib/include/import.h: No such file or directory #include "bindlib/include/import.h" ^ compilation terminated. ... And more of the same ilk. Am I missing some obvious configuration or something? The boost version is at tag boost-1.58.0 and AFIO is at tag v1.31_Boost_v1.58. The BindLib submodule does contain include/import.h. Regards, Brian

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[Property Tree] No documentation for <boost/property_tree/ptree.hpp>
by Nevin Liber 27 Apr '15

27 Apr '15

At < http://www.boost.org/doc/libs/1_58_0/doc/html/property_tree/reference.html#…> The entry for "Header <boost/property_tree/ptree.hpp>" is blank. It looks like a 1.58 bug. Kind regards, Nevin :-) -- Nevin ":-)" Liber <mailto:nevin@eviloverlord.com> (847) 691-1404

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1.58.1 bugfix release necessary?
by Oliver Kowalke 27 Apr '15

27 Apr '15

Unfortunately boost.context fails to compile for gcc-4.8.x and option -std=c++11. Because of a dependency to boost.context, boost.asio and boost.coroutine do not compile too. I've pushed a pull-request to boost.config - the patch adds C++14 test macro BOOST_NO_CXX14_INTEGER_SEQUENCE ( https://github.com/boostorg/config/pull/57) Oliver

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Review request for DLL
by Antony Polukhin 27 Apr '15

27 Apr '15

Hi, Me and Vladimir Prus (review manager) have agreed to start the review of the the DLL library on the June 29. We also agreed that a two weeks review period is required. So the review must go till July 12. Ronald, please adjust the review schedule if there's no objections. -- Best regards, Antony Polukhin

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[vmd] Getting regression tests
by Edward Diener 27 Apr '15

27 Apr '15

I created a pull request for boostorg/boost so that VMD is added to the regression tests. It has been sitting there for a long time now. Can someone at the Boost superproject level please address this pull request ? I want to have VMD added as a library in the next Boost release.

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Boost 1.58.0 has been released
by Marshall Clow 26 Apr '15

26 Apr '15

Release 1.58.0 of the Boost C++ Libraries is now available. These open-source libraries work well with the C++ Standard Library, and are usable across a broad spectrum of applications. The Boost license encourages both commercial and non-commercial use. This release contains two new libraries and numerous enhancements and bug fixes for existing libraries. New Libraries * Endian: Types and conversion functions for correct byte ordering and more regardless of processor endianness. * Sort: Includes spreadsort, a general-case hybrid radix sort that is faster than O(n*log(n)) For details, including download links, see http://www.boost.org/users/news/version_1.58.0 You can also download directly from SourceForge: http://sourceforge.net/projects/boost/files/boost/1.58.0/ To install this release on your system, see http://www.boost.org/doc/libs/release/more/getting_started/index.html Thanks, --The Boost release team Vladimir Prus Rene Rivera Marshall Clow Eric Niebler Daniel James Beman Dawes

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[interprocess] condition variables and spurious wakeups
by eg 26 Apr '15

26 Apr '15

Hi, I was hoping to get some clarification on whether the boost::interprocess library implementation of condition variables is susceptible to spurious wake ups. Most other library implementations (pthreads, boost::thread, std::thread) seem to be and are documented as such. I couldn't find any mention in the interprocess documentation nor find anything definitive in my google searching. Thanks in advance, Ed

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Latest dependency report
by Peter Dimov 25 Apr '15

25 Apr '15

... generated from the develop branch: http://www.pdimov.com/tmp/report-develop-c3bb6eb/module-overview.html http://www.pdimov.com/tmp/report-develop-c3bb6eb/module-levels.html http://www.pdimov.com/tmp/report-develop-c3bb6eb/module-weights.html

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[boost_document_library] [GSoC'15] How to Start? Any standards to follow?
by Abhinav Tripathi 25 Apr '15

25 Apr '15

Hello, I have finally set up my development environment on Ubuntu 14.10 x64... I am now able to compile any program consisting of Both OpenOffice and Boost code. I have made succesfully small examples with multiple files with both boost and OpenOffice sdk code and compiled them. . I am now ready to start writing code for the document library. What i could think of till now is : 1. Make the project on github and keep it synced 2. Separate classes in different headers with proper namespaces . What i am looking for : 1. Any suggestions on how to start! (More specifically) 2. Are there and standards that need to be followed for developing any library for boost (like using or not using some syntaxes &/or libraires) 3. Any suggestions as to what practices i should use, like which syntaxes/libraries to prefer. . Also, i see that all the boost libraries are independent (i.e., only dependence is within boost itself) [as far as i know]. While what i will be writing will depend on OpenOffice sdk. So, what are its chances to be accepted as an "actual boost library"? . Regards, Abhinav

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tokenizer for overlapping delimiters?
by Jorge Cardoso Leitão 25 Apr '15

25 Apr '15

Dear boost devs, I'm writing here because I've been coding a tokenizer that I believe, given its generality, could be an addition to Boost. I'm asking for a judgement on whether the idea has room in boost or not. The interface I'm proposing is a function of two arguments, a string (call it text) and a set of strings (call it key-terms), that returns a vector<string> (call it result) which fulfils 4 constraints: 1. a string in the result can only be either a key-term or a string between two key-terms; 2. the concatenation of the result is always the original text; 3. a key-term containing other key-terms has priority over the latter; 4. a key-term overlapping other has priority based on its position in the text A tokenizer that divides a string by delimiters is a subset of this interface whose key-terms are the delimiters. This is considered in Boost.Tokenizer, where the key-terms are *non-overlapping. *The critical addition here is the ability to deal with *overlapping key-terms*. A common use case of overlapping key-terms is when you have key-terms that you want to consider as single tokens but they overlap with common delimiters. A practical example: tokenize a string (with words separated by spaces) and guarantee that both `"United States of America"` and `"United States of Brazil"` are interpreted as single tokens. The non-triviality appears because such feat requires storing which key-terms are using a previous sub-string, and how to reverse in case the match fails. (e.g. "United States of " is common to both terms above, but once the first letter appears, either one or both can be discarded as potential matches). Some examples in pseudo-code (see how they fulfil constraints 1-4) tokenize("the end", {}) --> {"the end"} tokenize("the end", {" "}) --> {"the", " ", "end"} tokenize("foo-bar", {"foo", "foo-bar"}) --> {"foo-bar"} tokenize("the end", {"the e", " ", "end"}) --> {"the e", "nd"} tokenize("foo-tars ds", {"foo", "foo-bar", "-tar"}) --> {"foo", "-tar", "s ds"} As a proof of concept, I've implemented such interface and respective test cases, which you can find in https://github.com/jorgecarleitao/tokenize. Any change is possible to accommodate to boost standards: this can be generalized to arbitrary sequences, to arbitrary types, and to use iterators, documented, better tested etc. But before anything else, I would like to ask for an opinion on whether this is sufficiently general and useful to be considered to boost. Thank you for your time, Best regards, Jorge

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Description of pre-requisites for building Boost 1.58.0?
by Marko Asplund 25 Apr '15

25 Apr '15

Hi, While trying to build Boost on Ubuntu 14.04.2 LTS I noticed that the build failed because some library dependencies were missing on my system. I was unable to find documentation about library dependencies and other pre-requisites for building Boost. Are these documented somewhere? Some build related info can be found here, but I couldn't find info about required libraries: http://www.boost.org/doc/libs/1_58_0/more/getting_started/unix-variants.html I was able to build Boost after installing libpython-dev, libbz2-dev packages. This was with default Boost configuration, so other libraries may be required for custom configurations. marko

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[CMT] List of libraries being maintained
by Edward Diener 24 Apr '15

24 Apr '15

Is there a list of libraries being maintained by the community maintenance team ?

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[config] Configuring for C++14 and later library features.
by John Maddock 24 Apr '15

24 Apr '15

Folks, I have an open PR for adding BOOST_NO_CXX14_INTEGER_SEQUENCE (https://github.com/boostorg/config/pull/58) Unfortunately, the correct way to check for std::integer_sequence is to include <utility> and then check for __cpp_lib_integer_sequence. The problem is that we went to some lengths to remove dependencies on <utility> in https://github.com/boostorg/config/pull/40. Further, if we get requests for more such feature-detection macros, we would end up including the whole std lib (see http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2013/n3745#recs.cpp14) This doesn't look acceptable to me, but what to do? The only solution I can see is to simply not support these features in Boost.Config, but rather rely on users needing these features checking the std detection macros directly. Which will work up until someone implements a feature without defining the appropriate macro :( Thoughts? Thanks, John.

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Re: [boost] [thread] Windows compilation broke with 8853a4c
by Jürgen Hunold 24 Apr '15

24 Apr '15

Hi Vicente, On Mittwoch, 22. April 2015 22:50:05 Vicente J. Botet Escriba wrote: > I have rolled back the changes. Please let me know if it works now on > develop. Yes, everything is working again. Yours, Jürgen -- * Dipl.-Math. Jürgen Hunold ! * voice: ++49 4257 300 ! Fährstraße 1 * fax : ++49 4257 300 ! 31609 Balge/Sebbenhausen * jhunold(a)gmx.eu ! Germany

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Git tag for 1.58
by Brian Ravnsgaard Riis 24 Apr '15

24 Apr '15

Hi, 1.58 is still not tagged in the git repo. Does anyone know the sha1 of the relevant commit...? Regards, Brian

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[config] gcc,msvc,mingw visibility
by Robert Ramey 24 Apr '15

24 Apr '15

I've been enabling limited gcc visibility so that it works similarly to msvc *_DECL attributes and will export from the DLL/DSO only those symbols which need to be exported. I've had a lot of difficulty with this. I followed the instructions http://www.boost.org/doc/libs/1_58_0/libs/config/doc/html/boost_config/boos… which more or less boil down to using BOOST_SYMBOL_EXPORT when functions are exported, BOOST_SYMBOL_IMPORT when functions are imported, and BOOST_SYMBOL_VISIBLE on class declarations. I set my Jamfile.v2 in the library build to enable gcc visibility=hidden and let her rip. After the more or less normal back and forth it seemed that the library built and work on all platforms/compilers. .... EXCEPT Mingw. Hmmmm - this shouldn't be too tough, just look at how the other libraries did it. Turns out that it seems that no boost libraries actually enable gcc visibility in their builds - at least as far as I can tell. (I didn't dig into the depths of jam tools files). After a fair amount of research I concluded that for windows platforms - regardless of whether they are built with minnow (gcc) or mdvc, one needs to define BOOST_SYMBOL_VISIBLE as BOOST_SYMBOL_IMPORT or BOOST_SYMBOL_IMPORT which of course makes things more complicated. So here is what I came up with. My questions are: a) did I do this right? b) is there a simpler way c) if the answer to the above is no - can the documentation be updated? Robert Ramey -- View this message in context: http://boost.2283326.n4.nabble.com/config-gcc-msvc-mingw-visibility-tp46747… Sent from the Boost - Dev mailing list archive at Nabble.com.

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[boost.serialization] Problem when serializing a wide char on version 1.58.0
by Marco Oman 23 Apr '15

23 Apr '15

Hi to all, I am having a problem with boost serialization on version 1.58.0 The code at the end of the post is nearly the same found at the beginning of the page libs/serialization/doc/index.html (the 'Very simple case'). The only relevant difference is the use of the wide char version of archive (and fstream) and an additional 'name' text field in the sample structure. This text contains a cyrillic character (the capitol 'D') The problem I am having with this code is that it throws an exception when using version 1.58.0, while everything is OK if I compile/link against version 1.57.0 The problem seems to be related with character conversion: the library seems to convert non ascii chars to local default codepage, instead of UTF-8. So everything looks fine as long as I use characters convertable to my codepage. I gave a look at the differencies between the two versions, but they are definitely beyond my reach... Tests done on windows with MSVC2013 and MSVC2008 Marco #include <fstream> // include headers that implement a archive in simple text format #include <boost/archive/text_woarchive.hpp> #include <boost/archive/text_wiarchive.hpp> ///////////////////////////////////////////////////////////// // gps coordinate // // illustrates serialization for a simple type // class gps_position { private: friend class boost::serialization::access; // When the class Archive corresponds to an output archive, the // & operator is defined similar to <<. Likewise, when the class Archive // is a type of input archive the & operator is defined similar to >>. template<class Archive> void serialize(Archive & ar, const unsigned int version) { ar & degrees; ar & minutes; ar & name; ar & seconds; } int degrees; int minutes; std::wstring name ; float seconds; public: gps_position(){}; gps_position(int d, int m, float s, const std::wstring &n) : degrees(d), minutes(m), seconds(s), name(n) {} }; int main() { // create and open a character archive for output std::wofstream ofs("filename"); // create class instance const gps_position g(35, 59, 24.567f, L"AДbc"); // save data to archive { boost::archive::text_woarchive oa(ofs); // write class instance to archive oa << g; // archive and stream closed when destructors are called } // ... some time later restore the class instance to its orginal state gps_position newg; { // create and open an archive for input std::wifstream ifs("filename"); boost::archive::text_wiarchive ia(ifs); // read class state from archive ia >> newg; // archive and stream closed when destructors are called } return 0; }

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