February 2017 - Boost - lists.preview.boost.org

Requirements: min and max macros
by Vinnie Falco 05 Feb '17

05 Feb '17

From http://www.boost.org/development/requirements.html#Naming "Make sure your code compiles in the presence of the min() and max() macros. Some platform headers define min() and max()macros which cause some common C++ constructs to fail to compile. Some simple tricks can protect your code from inappropriate macro substitution:..." There is one case not addressed. What to do with this: std::min<std::size_t>(a, b); ?

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[build] Pre-built libraries and targets
by Edward Diener 04 Feb '17

04 Feb '17

In a jamfile I have: lib user32 ; lib gdi32 ; exe test1 : main.cpp user32 gdi32 ; According to the Boost Build documentation the 'lib' syntax above refers to pre-built libraries, and not libraries I mean to build as a shared or static library. When I run b2 with a particular toolset, and use the --debug-building option to see what targets are being built, I see results of: Building target '../../../libs/test_local/build/user32'... and Building target '../../../libs/test_local/build/… [View More]

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Call for Submissions: International Conference on Information Society (i-Society 2017) || July 17-19, 2017, Dublin, Ireland
by David Brown, i-Society 2016 03 Feb '17

03 Feb '17

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Mail Lists Migrate at 00:00 UTC Feb 3
by Michael Caisse 02 Feb '17

02 Feb '17

The following mail lists will be switched to new infrastructure at 00:00 UTC on February 3rd. There will be a small interruption while the DNS/MX records propagate. * Boost - Boost developers' mailing list * Boost-announce - Boost announce-only mailing list * Boost-bugs - Bugs reported/updated through Boost's Trac * Boost-build - Boost.Build developer's and user's list * Boost-cmake - Discussion of the CMake-based build system for Boost * Boost-commit - Boost Subversion commit messages * … [View More]

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[factory][bind] C2664 with MSVC 2015 & 1.63
by Jens Weller 02 Feb '17

02 Feb '17

Hello Boost, I'm having this Problem: http://lists.boost.org/boost-users/2015/04/84176.php That message already describes pretty much what I see, except that I use 1.63 and the latest 2015 VC++. Errormessage: D:\cpp\libraries\boost_1_63_0\boost\bind\bind.hpp:388: error: C2664: 'ListsModuleWidget *boost::factory<ListsModuleWidget *,void,boost::factory_alloc_for_pointee_and_deleter>::operator ()(void) const': cannot convert argument 1 from 'Module *' to 'Module *&' bind.hpp code: &… [View More]

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[outcome] Feedback on parts A and B of Tutorial mk III requested
by Niall Douglas 02 Feb '17

02 Feb '17

Dear Boost, I am truly hoping that this will be the last time I ask for feedback on Outcome's tutorial as this is the third complete rewrite. Many thanks for all the feedback so far, this Mk. III tutorial wouldn't look like this without all your help. Part A is 100% on pure expected<T, E> as currently before the standards committee. It has nothing to do with Outcome, but places Outcome in context. Part B is a polemic on why people should not use arbitrary type E in expected<T, E> … [View More]

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filtering_streambuf: Compressing a character buffer
by Adlai Shawareb 02 Feb '17

02 Feb '17

Hi, I have a character buffer ( "buffer" ) of known size ( "size_in_bytes" ), and would like to compress it using gzip_compressor and then get a pointer to the compressed buffer along with the compressed size. I've put together the following, but it says the first counter is 0 and the second counter is 2. Any help that can be offered is appreciated. namespace io = boost::iostreams; boost::asio::streambuf sb; std::ostream os(&sb); os.write( buffer, size_in_bytes ); io::… [View More]

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[type_erasure] Inefficient extra shared_ptr copy when passing parameter of type _self
by Yuanchen Zhu 01 Feb '17

01 Feb '17

Hi List, I have been using boost::type_erasure a bit. I found that in the case of implementing equality_comparable, when it passes into operator== a placeholder argument corresponding to some any<C, T>, it always wraps it in a param<C, T>, which internally instantiates an any<C, T&>. While this instantiation does not cause the actual content to be copied, it always clone the share_ptr pointing to the dispatch table, causing an extra shared_ptr construct/destruct … [View More]

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[serialization][uBlas] Serialization still breaking anything that uses uBlas?
by John Maddock 01 Feb '17

01 Feb '17

See for example: http://www.boost.org/development/tests/develop/developer/output/teeks99-02-… I'd really like to get these failures off my radar if possible... Thanks, John.

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[testing] Need optimization help!!!
by Rene Rivera 01 Feb '17

01 Feb '17

If someone is interested in an optimization challenge here's your opportunity. Currently the program(s) that generate the test results take a long time to run. In both the live setup of a 4 core 16 GB ram VM it takes about 40 minutes to generate the reports for master and develop branches. On my 4 core 16 GB ram real hardware SSD HD machine it also takes about 40 minutes. If some brave soul could look into why it's so terribly slow the Boost community would be very grateful. As it would make … [View More]

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Re: [boost] Is there any interest in non-owning pointer-like types?
by Joseph Thomson 01 Feb '17

01 Feb '17

On 1 Feb 2017 7:51 p.m., "Olaf van der Spek" <ml(a)vdspek.org> wrote: On Wed, Feb 1, 2017 at 12:39 PM, Oswin Krause <Oswin.Krause(a)ruhr-uni-bochum.de> wrote: > On 2017-02-01 12:02, Olaf van der Spek wrote: >> >> On Wed, Feb 1, 2017 at 11:24 AM, Oswin Krause >> <Oswin.Krause(a)ruhr-uni-bochum.de> wrote: >>> >>> For me, the biggest problem of the proposal is that observer_ptr<T> is >>> implicitely constructed from T&. … [View More]

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Re: [boost] Boost XML Serialization Stability across library versions
by Adlai Shawareb 01 Feb '17

01 Feb '17

Thanks Robert, Regarding your suggestion to use text serialization. Since, over time, we will be adding and deleting data from the data set that we serialize, would the following be the right approach to managing the changes in the data that is de/serialized. I'm thinking that we would set the BOOST_CLASS_VERSION before de/serializing. { ar & mInt; If(version >= 2) ar & mFloat; If(version >= 3) … [View More]

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