July 2015 - Boost - lists.boost.org

A GUI Library
by jinhao 09 Nov '17

09 Nov '17

Hi, all I am developing a GUI library, it takes aim at easy-to-use and portable library for modern C++ methods. The project at http://stdex.sourceforge.net A git repository at http://nanapro.codeplex.com A brief at http://nanaproject.wordpress.com/2011/12/16/preliminary-study-of-nana-c-lib… Is there any interest in this library? Regards Jinhao

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Re: [boost] Boost CRC maintainer (Daryle Walker) missing in action?
by Olaf van der Spek 19 Jun '17

19 Jun '17

Hi Daryle, Any luck on your new setup? Gr, Olaf On Mon, Nov 28, 2011 at 1:11 AM, Daryle Walker <darylew(a)gmail.com> wrote: > I can look at it once I've finished my new setup. > > I had to reset my computer after a partial crash years ago. I never > got around to recreating my programming setup. My computer had been > at its maximum Operating System level back then, which is now 3 > versions behind. For the past few months, I've had my sister's old > laptop, with Windows Vista, and am trying to add a programming setup > to it now. > > > On Tue, Nov 22, 2011 at 7:18 AM, Beman Dawes <bdawes(a)acm.org> wrote: >> Hi Daryle, >> >> This guy has volunteered to take over maintenance of Boost CRC. Should >> we take him up on his offer? > >> ---------- Forwarded message ---------- >> From: >> Date: Wed, Nov 2, 2011 at 7:51 AM >> Subject: [boost] Boost CRC maintainer (Daryle Walker) missing in action? >> To: boost(a)lists.boost.org >> >> >> Hi, >> >> It looks like the Boost CRC maintainer (Daryle Walker) is missing in action? >> >> No response to tickets from the past 3 years. What's the procedure in this case? >> >> https://svn.boost.org/trac/boost/ticket/2492 >> https://svn.boost.org/trac/boost/query?component=crc&col=id&col=summary&col… > > -- > Daryle Walker > Mac, Internet, and Video Game Junkie > darylew AT gmail DOT com -- Olaf

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bad include guards
by Steven Watanabe 26 Jan '17

26 Jan '17

AMDG The following pairs of files have identical include guards ./boost/concept_check/general.hpp ./boost/concept/detail/msvc.hpp ./boost/concept_check/msvc.hpp ./boost/concept/detail/msvc.hpp ./boost/filesystem/cerrno.hpp ./boost/cerrno.hpp ./boost/interprocess/containers/tree.hpp ./boost/interprocess/containers/detail/tree.hpp ./boost/mpl/min_max.hpp ./boost/mpl/max.hpp ./boost/mpl/vector/aux_/front.hpp ./boost/mpl/list/aux_/front.hpp ./boost/multi_index/identity_fwd.hpp ./boost/multi_index/identity.hpp ./boost/python/pointee.hpp ./boost/python/detail/pointee.hpp ./boost/spirit/phoenix/closures.hpp ./boost/lambda/closures.hpp ./boost/xpressive/proto/v1_/proto_typeof.hpp ./boost/xpressive/proto/proto_typeof.hpp ./libs/config/test/boost_no_dep_nested_class.ipp ./libs/config/test/boost_has_vc6_mem_templ.ipp ./libs/config/test/boost_no_mem_templates.ipp ./libs/config/test/boost_has_vc6_mem_templ.ipp ./libs/config/test/boost_no_std_allocator.ipp ./libs/config/test/boost_has_vc6_mem_templ.ipp ./libs/conversion/test.hpp ./libs/any/test.hpp ./libs/interprocess/example/print_container.hpp ./libs/interprocess/example/printcontainer.hpp ./libs/interprocess/test/expand_bwd_test_template.hpp ./libs/interprocess/test/allocation_test_template.hpp ./libs/interprocess/test/printcontainer.hpp ./libs/interprocess/example/printcontainer.hpp ./libs/interprocess/test/print_container.hpp ./libs/interprocess/example/printcontainer.hpp ./libs/iostreams/test/detail/utf8_codecvt_facet.hpp ./boost/detail/utf8_codecvt_facet.hpp ./libs/regex/test/regress/test_regex_search.hpp ./libs/regex/test/regress/test_partial_match.hpp ./libs/serialization/test/C.hpp ./libs/serialization/test/A.hpp ./libs/xpressive/perf/regex_comparison.hpp ./libs/regex/performance/regex_comparison.hpp ./tools/inspect/time_string.hpp ./tools/common/time_string.hpp In Christ, Steven Watanabe

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[multiprecision] uses boost::math::gcd without including the header
by Peter Dimov 04 Jan '16

04 Jan '16

include/boost/multiprecision/cpp_int/misc.hpp uses boost::math::gcd (and lcm), but does not include common_factor_rt.hpp.

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[variant] Opinion on boost::safe_get<> and default boost::get<> behavior
by Antony Polukhin 18 Dec '15

18 Dec '15

Hi all, I'm in doubt and would like to hear opinions on the following issue. boost::get for boost::variant was not making any compile time checks, resulting in runtime errors where a compile time error must be: boost::variant<int, string> v(100); boost::get<bool>(&v); // returns NULL instead of compile time error boost::get<bool>(v); // throws exception on runtime instead of compile time error Now we have an implementation of compile time checked get in a separate branch at git: boost::variant<int, string> v(100); boost::safe_get<bool>(&v); // compile time error boost::safe_get<bool>(v); // compile time error boost::unsafe_get<bool>(&v); // returns NULL instead of compile time error boost::unsafe_get<bool>(v); // throws exception on runtime instead of compile time error I'm in doubt, what the default behavior of boost::get must be: * safe_get behavior is much closer to Standard Library behavior (just like std::get for tuples) and allows to avoid errors in user code * unsafe_get behavior is same as behavior of old boost::get and won't break user's code if boost::get is used in some generic contexs What's your opinion? -- Best regards, Antony Polukhin

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[thread] Do we can a non backward compatible version with non-blocking futures?
by Vicente J. Botet Escriba 18 Oct '15

18 Oct '15

Hi, in Boost 1.58 I fixed some issues as the result of the async and future<T>:then() was not a blocking future as the documentation described. However the implementation is horrible and I suspect that it is subject to deadlocks. BTW, I added already some fixes on the develop branch. Sometime ago I started in a branch an implementation that don't use blocking futures [1]. Well the implementation is also horrible after making futures non-blocking, but less ;-) The problem is that now I have some issues with the executors :( Anyway, Gor has told me that with the blocking implementation he is unable to define await_suspend (using resumable functions) >It is just if .then returns a blocking future, I cannot subscribe a callback to .then in await_suspend. >await_suspend(f, cb) { > f.then(cb); >} &will block here preventing coroutine from suspending I don't know yet if he will reach to configure boost::future<T> on the non-blocking branch. My question is if the Boost community will accept (or even wants) a breaking change on a near release (when I would reach to fix the executors issues) including non-blocking futures instead of the current blocking futures. Best, Vicente [1] https://github.com/boostorg/thread/tree/feature/non_blocking_futures

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[WG21 mailing] N4453 Resumable expressions
by Niall Douglas 15 Oct '15

15 Oct '15

I'm finding Chris' paper on resumable expressions instead of compiler magic created resumable functions awfully compelling: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2015/n4453.pdf I essentially proposed the same with my functionally composed constexpr basic_future design some months ago. Would anyone else like to comment on this library based instead of compiler based resumable execution? I'm not against some compiler support for resumable execution, but I am finding the await based proposal highly problematic, and Chris does an excellent job in summarising my own thoughts on what's wrong with it. Niall -- ned Productions Limited Consulting http://www.nedproductions.biz/ http://ie.linkedin.com/in/nialldouglas/

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Re: [boost] [afio] AFIO review postponed till Monday
by Glen Fernandes 29 Aug '15

29 Aug '15

Did the review start yesterday? Glen

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"Simple C++11 metaprogramming"
by Peter Dimov 22 Aug '15

22 Aug '15

I've recently made the mistake to reread Eric Niebler's excellent "Tiny Metaprogramming Library" article http://ericniebler.com/2014/11/13/tiny-metaprogramming-library/ which of course prompted me to try to experiment with my own tiny metaprogramming library and to see how I'd go about implementing tuple_cat (a challenge Eric gives.) Ordinarily, any such experiments of mine leave no trace once I abandon them and move on, but this time I decided to at least write an article about the result, so here it is, with the hope someone might find it useful. :-) http://pdimov.com/cpp2/simple_cxx11_metaprogramming.html

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[filesystem] proposal: treat reparse files as regular files
by Paul Harris 14 Aug '15

14 Aug '15

Hi all, -- Proposal -- tl;dr : I propose that we treat all non-symlink "reparse_files" as "regular_files". If the boost library user wants to do something special with these plain reparse files, they should use alternative means. But typically they are supposed to be treated as regular files. This means we could drop the "reparse_file" enum, or continue to use it for a special-case whats_my_real_status() function. --- Motivation --- Windows Server 2012 uses reparse points to implement deduplification. Those files should be treated as regular files in all circumstances. Currently, they are not classed as "regular" files, so fs::copy() will skip those files, and library-user code written to list files based on official examples will ignore all dedup'd files. This is causing serious and latent problems at the user end, because deduping only happens occasionally after X days, and users cannot easily check if a file is dedup'd (they look just like regular files). --- Real life example --- Another example of reparse use is the "Symantec Enterprise Vault" (version 10), which I found running on one site. It replaces files on the server with reparse-point files. FSUTIL REPARSEPOINT QUERY filename.txt shows the contents of the reparse buffer, which is a URL to an internal HTTP server. The url points to a .asp link with a bunch of codes and dates to identify the file in the server. Copy-pasting that URL into a webbrowser allows you to directly download the file via the webbrowser, which is pretty neat I suppose. In this case, the reparsed-files in Windows Explorer all have grey X crosses on their file icon. If you "type" them (via cmd) or open them, the icon loses the grey cross and the file is no longer a reparse point file. My software refused to read the files because they were "not regular files". Once I adjusted the boost code (described below), my software saw them as regular and opened the files. The file icons lost the grey cross. SO it seems that the file server automatically downloads and replaces the files with the stored content on demand, and the file reading client program should really just treat these files as normal files. --- Short logic --- reparse files (that are not symlinks) should almost always be treated as plain files. They are a mechanism for MS file servers to store files in clever ways, but the client should not care and just read/write them as if they were normal files. This is different to all the other "other" files which can't be treated like normal files: block, character, fifo, socket, unknown So, reparse files should not be grouped with the "other" file types. They are also NOT symlinks, and should not be treated as symlinks (which would require special decisions for copying, or querying the status, or checking if the target still exists). --- What are reparse files --- I did some reading, if I understand correctly: Reparse points give drivers (on the server) a chance to get data through some other specialised means (eg query from a cluster store). They are processed by the server, not the client, so clients should treat reparse data as opaque data. EXCEPT for symlink reparse files. https://msdn.microsoft.com/en-us/library/dd541667.aspx quote:"The following reparse tags, with the exception of IO_REPARSE_TAG_SYMLINK, are processed on the server and are not processed by a client after transmission over the wire. Clients should treat associated reparse data as opaque data." It seems like the rest of the tags are used for connecting files to other types of storage (eg long term storage, cluster storage). Clients may need to do something special with SOME reparse point files, IF the client cares about how long the file read may take. https://msdn.microsoft.com/en-us/library/windows/desktop/aa365505(v=vs.85).… quote: "Most applications should take special actions for files that have been moved to long-term storage, if only to notify the user that it may take a while to retrieve the file." --- Changes required --- Option 1: change is_regular_file() to return true where type==reparse_file I don't like this option, as library-users could be checking the type directly instead of using is_regular_file(). Option 2: These functions return reparse_file: fs::file_type query_file_type(const path& p, error_code* ec) file_status status(const path& p, error_code* ec) file_status symlink_status(const path& p, error_code* ec) They should instead return regular_file instead. --- How to test with dedup files --- Creating dedup'd files is a feature only available on Windows Server 2012, I believe, although Windows XP/Vista/7/8/10 clients all can read dedup files. Here is how I created a windows server to test with (for free!) on a demo Azure cloud server. I have one working, so if anyone would like to use it for their testing, let me know. Step one: follow this blog article: http://blogs.technet.com/b/tommypatterson/p/azureservertrial.aspx once the machine was "running" I clicked Connect at the bottom. That gave me an .rdp file which in theory I could use with rdesktop, but it uses a DNS name that was only just created, so that didn't work. When you click the name of the server in the list, it shows the public IP on the right.. and the port then you can do this $ rdesktop that.ip.addr:port But only if you have the latest rdesktop AND you have set up kerberos something-something. Instead I found a windows computer and used remote desktop from there. --- Once inside, in the "Server Manager --> Dashboard" window on the screen, click "Add Roles" then go next next until "Server Roles" expand "File and Storage services" , "File and iSCSI" , and tick "Data Deduplication" Then next next etc and Install. Wait a bit... and its done. http://www.techrepublic.com/blog/data-center/configuring-windows-server-8-d… --- Continuing on that webpage... Time to enable dedup. There is a temp disk D: so lets enable there. Method 1... I did this and then went to method 2... Start PowerShell, type: "Enable-DedupVolume D:" Method 2... in that same Dashboard, hit the 4th button (File and Storage Services) Then Volumes --> Disks click Volume 1 at the top, and then right click D: at the bottom --> Configure Dedup. To try and accelerate this puppy, I set the "age to dedup" to 0 days. http://www.techrepublic.com/blog/data-center/windows-server-2012-deduplicat… --- Time to make something to dedup. We'll just duplicate the warning.txt file that exists on D: In powershell: PS> D: PS> $file = Get-Content DATALOSS_WARNING_README.txt Then, do these 2 commands a bunch of times until "big.txt" gets to say 6MB PS> Add-Content big.txt $file PS> $file = Get-Content big.txt Then use windows explorer (or other) to make a dozen copies of big.txt Copy c:\windows\explorer.exe to D: to give it something to dedup Go to D: and then copy-paste explorer.exe a dozen times. In PowerShell, type: PS> Update-DedupStatus -Volume D: PS> Start-DedupStatus -Type Optimization -Volume D: and then wait for it to finish. you can track its progress with: PS> Get-DedupJob PS> Get-DedupStatus -Volume D: --- So, once its deduped, you check. PS> FSUTIL REPARSEPOINT QUERY big.txt you should see that its a reparse point with that 0x800etc0013 code. Copy-paste big.txt to big2.txt and check it with the query, and it should tell you big2 is NOT a reparse point. NOW you have some files to test the boost library... You can't zip them up (they lose the dedup tag), you have to run boost binaries ON the computer in the sky. --- Finish --- Thanks for reading, Paul

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[context] msvc /SAFESEH
by Jeff Flinn 12 Aug '15

12 Aug '15

I need to build my application with /SAFESEH which uses boost coroutine which uses context. I'm getting the following link errors: 1>libboost_context-vc100-mt-gd-1_53.lib(jump_i386_ms_pe_masm.obj) : error LNK2026: module unsafe for SAFESEH image. 1>libboost_context-vc100-mt-gd-1_53.lib(make_i386_ms_pe_masm.obj) : error LNK2026: module unsafe for SAFESEH image. I've built boost static libs with the same MSVC vesion and options (sans /SAFESEH as it's not a compile/lib option) Compiler/linker versions: Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 16.00.40219.01 for 80x86 Microsoft (R) Incremental Linker Version 10.00.40219.01 Has anyone run into this and resolved the error? Any insight is appreciated. Thanks, Jeff

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[build] Problems with VC14 and MSPDB140.DLL (was: [testing][teeks] MSVC-14 errors about MSPDB140.DLL)
by Andrey Semashev 11 Aug '15

11 Aug '15

On Sat, May 23, 2015 at 4:40 PM, Hartmut Kaiser <hartmut.kaiser(a)gmail.com> wrote: > >> All tests for Boost.Log (and I suspect any other built libraries) on MSVC- >> 14 >> are failing because of this error: >> >> LINK : fatal error LNK1101: incorrect MSPDB140.DLL version; recheck >> installation of this product > > My workaround was to edit the 'Path' env variable in one of the temp files > generated by bjam (b2_msvc_14.0_vcvarsall_amd64.cmd in your temp directory) > not to point to the x64 cross compiler, but to the native one. For me this > involved changing > > C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\amd64_x86 > > To > > C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\BIN\amd64 I encountered the same problem with VC14 RTM on my VM. This was a clean install of VC14 RTM, there were no CTPs or RCs installed on this machine. I removed the b2_msvc_14.0_vcvarsall*.cmd scripts and ran b2 with address-model=64 to build my tests so that these scripts are re-created from scratch, so it looks like there is a problem with how these scripts are generated by b2. I found 3 instances of mspdb140.dll on my system in these locations: C:\Program Files (x86)\Microsoft Visual Studio 14.0\Common7\IDE C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\bin C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\bin\amd64 The last two are for 32 and 64-bit native compilers. The first one, I assume, is for use by IDE. The problem is that the first path is listed in b2_msvc_14.0_vcvarsall_x86_amd64.cmd in the "SET Path=..." line prior to the compiler-specific paths. Removing it from the Path solved the problem. Could Boost.Build be adjusted so that the cmd files are generated correctly in the first place?

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Broken links in 1.58.0 release notes
by Jonathan Wakely 04 Aug '15

04 Aug '15

At http://www.boost.org/users/history/version_1_58_0.html the release notes on the breaking change for Variant say "See get.hpp and polymorphic_get.hpp descriptions for more info" but both hyperlinks are broken.

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Review Request: QVM (generic Quaternion, Vector and Matrix operations library)
by Emil Dotchevski 04 Aug '15

04 Aug '15

Boost QVM defines a set of generic functions and operator overloads for working with quaternions, vectors and matrices of static size. The library also defines vector and matrix data types, however it allows users to introduce their own types by specializing the q_traits, v_traits and m_traits templates. Online documentation and a link to download the source code under the Boost license is available at http://www.revergestudios.com/boost-qvm/. I would like to thank Adam Wulkiewicz for volunteering to be the review manager for QVM and for his valuable initial feedback. Thanks, Emil Dotchevski

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BOOST_NO_CXX11_CONSTEXPR and msvc-14.0
by Peter Dimov 04 Aug '15

04 Aug '15

I see that BOOST_NO_CXX11_CONSTEXPR is no longer being defined for msvc-14.0. Even the RTM version has spotty support for constexpr though; the techniques in my metaprogramming article, for example, don't work. One simple example that fails is #include <type_traits> template< int I > struct X { }; template<class... T> constexpr int f( T... t ) { return 1; } template< class... T > struct Y: X< f(std::is_same<T, void>::value...) > { }; Y<void, void, void> y; int main() { } Another is #include <type_traits> template< class... T > struct X { static constexpr bool v[] = { std::is_same<T, void>::value... }; }; int main() { }

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[serialization] Errors when testing withe mingw-64/gcc on Windows
by Edward Diener 04 Aug '15

04 Aug '15

When running serialization tests with mingw-64/gcc on Windows I get repeated errors of the form: ..\..\../boost/archive/detail/basic_oarchive.hpp:64:5: error: function 'boost::archive::detail::helper_collection& boost::archive::detail::basic_oarchive::get_helper_collection()' definition is marked dllimport get_helper_collection(){ Is this a known problem ? Testing with VC++ does not give any errors.

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Boost 1_59_0_b1_rc1 is available for testing
by Marshall Clow 02 Aug '15

02 Aug '15

Release candidate files for 1.59.0 beta 1 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_59_0_b1_rc1.7z) = f54a97e5ee7f8e3d04cd9af8396e30f9 MD5 (boost_1_59_0_b1_rc1.tar.bz2) = 9804305aae0c9de9f8cfc02e3de75167 MD5 (boost_1_59_0_b1_rc1.tar.gz) = e584770bd76885c123a0426d24466fe2 MD5 (boost_1_59_0_b1_rc1.zip) = ee34f223aa789a6b3f727cb9480651ed Thanks! -- The release managers

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Boost 1.53 Libraries for Android
by Ian Calegory 31 Jul '15

31 Jul '15

I've compiled and made available for download the Boost C++ 1.53 Libraries for Android. This enables cross platform code in C++ that uses the Boost libraries. It is especially useful for Embarcadero's FireMonkey environment in RAD Studio, where cross platform code written in C++ can run on Windows, Android, Mac OS X, and iOS. Conceivably, cross platform code can be written using the Boost libraries that can run on all of the aforementioned environments. (The other platform libraries would have to be available, of course, and RAD Studio comes with Boost pre-compiled for Windows; Boost of course is widely available for Mac OS X.) Here is my web page where the include files and .a library files (one file for each of the four main Android architectures) is available for download: http://www.mandelmania.net/boost.html Any comments welcome. logo final small 11 Ian Calegory Software Engineer <mailto:ianc102002@yahoo.com> ianc102002(a)yahoo.com <http://www.mandelmania.net/> http://www.mandelmania.net

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devector feedback request
by Benedek Thaler 30 Jul '15

30 Jul '15

Dear Boost, I'm happy to announce the new devector container developed as part of the GSoC programme reached a presentable state. I invite you to take a look and ask for feedback. Main features: - every std::vector feature - front operations with amortized linear complexity - optional small buffer optimization - customizable growth policy (see the docs) - unsafe methods for the brave and performance addicts Documentation: - Intro: http://erenon.hu/container/container/non_standard_containers.html#container… - Usage: http://erenon.hu/container/container/examples.html#container.examples.devec… - API: http://erenon.hu/container/boost/container/devector.html#idp86138944 Code: - Implementation: https://github.com/erenon/container/blob/devector/include/boost/container/d… - Tests: https://github.com/erenon/container/blob/devector/test/devector_test.cpp Thanks, Benedek

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[Log] Running in a separate thread
by Andrew Hundt 29 Jul '15

29 Jul '15

I really only need some of the functionality of BOOST_LOG_TRIVIAL, perhaps plus loving to a file in addition to the console. However, my only true need is that all the work (or as much as possible) must be done in a separate thread so as not to slow the current thread down. Right now when I use BOOST_LOG_TRIVIAL as is it causes latency in my network communications which have soft realtime requirements so I've had to comment all of my logs out. Is there a straightforward non-intrusive solution to having as much of the work as possible for boost.log be done in a separate thread? Thanks for your help! Cheers! Andrew Hundt

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Boost.DLL formal review result
by Vladimir Prus 28 Jul '15

28 Jul '15

The Boost.DLL library is accepted. Congratulations to Antony, and thanks for everybody who reviewed the library! The votes were as follows: - Ralf Globisch - Yes - Klaim - Joël Lamotte - Yes - Niall Douglas - Yes, conditionally - John P Fletcher - Yes - Bjorn Reese - Yes - Edward Diener - Yes - Rodrigo Madera - Yes - Richard - Yes I'd like to also thank Thomas Trummer, Rob Stewart and Ion Gaztañaga for their contribution to review. The key suggestions from the review are listed below. None is critical enough to become a formal prerequisite, or require a mini-review. The library can be added when Antony feels its ready. Naming ----------- There was a concern that "DLL" might sound windows specific, and search for best terminology. This does not seem all that important, as soon as documentation introduces the terminology it uses, and is consistent. OSX support ------------------- The library was found not to work on OSX; I believe this issue was already fixed off-list with help from Rodrigo. Documentation ---------------------- Several people requested improvements. Bjorn and John, in particular, pointed out specific issues. This seems to be the post important change prior to adding the library. Dependencies on Boost and system headers ---------------------------------------------------------------- It was suggested that the library does not depend on other Boost C++ Libraries. While it might be helpful to some users, I find it logically impossible for a Boost formal review to request that dependencies on Boost libraries be removed. It was also mentioned that Boost.DLL is header-only library and includes system headers that can bring a lot of symbols and maybe macros. I don't think an actual problem was reported, though, and there is no way to avoid the problem while staying header-only. It's up to the author to consider these suggestions and do something, or don't do anything. Continuous integration -------------------------------- There was a recommendation from Niall to improve CI of the library, including static analysis, valgrind, Windows CI, showing CI status in documentation and so forth. These are good suggestions. At the same time, they are not specific to Boost.DLL, and it's not the goal of a formal review to create new generic development process requirements. Many existing libraries of indisputably high quality do not have these requested mechanisms. Therefore, the author can act on these suggestions as he sees fit. Thanks, -- Vladimir Prus http://vladimirprus.com

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BGL pull requests
by Mads Jensen 27 Jul '15

27 Jul '15

Hi, There are many quite trivial pull requests on Github for BGL. Can the project responsible please have a look at them? Most of them just fix typos and add more clarity to the documentation. Thank you, -- Med venlig hilsen / Kind regards, Mads Jensen Gunnery Sergeant Hartman: What's your excuse? Private Cowboy: Sir, excuse for what, sir? Gunnery Sergeant Hartman: I'm asking the fucking questions here, private! Do you understand? -- Full Metal Jacket

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[mpl] Problem with VC++14 and boost::mpl::size_t
by Edward Diener 27 Jul '15

27 Jul '15

The just released VC++14 has a problem with the boost::mpl::size_t template. After preprocessing it sees: namespace boost { namespace mpl { template< std::size_t N > struct size_t { static const std::size_t value = N; typedef size_t type; typedef std::size_t value_type; typedef integral_c_tag tag; typedef boost::mpl::size_t< static_cast<std::size_t>((value + 1)) > next; typedef boost::mpl::size_t< static_cast<std::size_t>((value - 1)) > prior; operator std::size_t() const { return static_cast<std::size_t>(this->value); } }; template< std::size_t N > std::size_t const boost::mpl::size_t< N >::value; }} and gives the error message: size_t.cpp(nnn): error C2872: 'size_t': ambiguous symbol predefined C++ types (compiler internal)(16): note: could be 'unsigned int size_t' size_t.cpp(nnn): note: or 'boost::mpl::size_t' pointing to the line after it encounters 'struct size_t' as far as I can make out ( you need to preprocess the size_t.cpp test, comment out the #line directives and run the test against the preprocessed result to see what the compiler is objecting to ). It therefore fails a number of mpl tests which all prior versions of VC++ pass. It flags this error in 5 mpl tests which use the boost::mpl::size_t integral wrapper, among which the easiest to analyze is the size_t.cpp test itself. Anybody have any idea what is going on here with the compiler, or whether it can be fixed somehow in VC++14 for the mpl code ?

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[config] BOOST_NO_CXX11_HDR_CODECVT is not defined for VC14
by Andrey Semashev 27 Jul '15

27 Jul '15

Hi, I see that BOOST_NO_CXX11_HDR_CODECVT is not defined for MSVC-14, although it is known that the codecvt facets are unusable because of linkin errors: https://connect.microsoft.com/VisualStudio/feedback/details/1348277/link-er… You can also see STL mentioning DevDiv#1060849 here: http://blogs.msdn.com/b/vcblog/archive/2014/11/12/visual-studio-2015-previe… and I can see that the problem is not fixed in RTM. This also concerns std::codecvt specializations for char16_t and char32_t. Can we define the BOOST_NO_CXX11_HDR_CODECVT macro for MSVC?

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[predef] Fails on Intel/win
by John Maddock 27 Jul '15

27 Jul '15

BOOST_COMP_INTEL is set to 0, which means that [ predef-require "BOOST_COMP_INTEL" ] fails. __INTEL_COMPILER is set to 1500. BOOST_COMP_INTEL is set to ( (((0)%100)*10000000) + (((0)%100)*100000) + ((0)%100000) ) Thanks, John.

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