January 2013 - Boost - lists.preview.boost.org

Re: [boost] [interprocess] (OS X) waiting on condition variable = CPU 100% + fans running loud
by Peter Dimov 08 Jan '13

08 Jan '13

> > Clang has std::atomic though, doesn't it? It probably supports the > > __sync intrinsics as well. > > Actually, it seems to support the even better __atomic intrinsics: > > http://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html Also here: http://libcxx.llvm.org/atomic_design_a.html

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Re: [boost] [interprocess] (OS X) waiting on condition variable = CPU 100% + fans running loud
by Peter Dimov 08 Jan '13

08 Jan '13

> Clang has std::atomic though, doesn't it? It probably supports the __sync > intrinsics as well. Actually, it seems to support the even better __atomic intrinsics: http://gcc.gnu.org/onlinedocs/gcc/_005f_005fatomic-Builtins.html

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[release] permission to merge (fix show-stopper in 1.53-rc)
by Oliver Kowalke 08 Jan '13

08 Jan '13

I'd like to merge trunk to release in order to fix bug #7864 (unresolved symbols on Windows)

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Re: [boost] new proposal: order statistics tree (Szymon Wojciechowski)
by Leo Goodstadt 07 Jan '13

07 Jan '13

> On Fri, Jan 04, 2013; 4:33am, "Rahul Sr" <srivasrrahul(a)gmail.com> wrote: > > On Wed, Jan 2, 2013 at 3:46 PM, Szymon Wojciechowski wrote: > > Briefly, it is container which allows logarithmic inserting, searching and > > erasing as in set, but additionally it permits to access elements via > > numerical value - key order. > > Will it be like this? > http://stackoverflow.com/questions/11230734/c-stl-order-statistic-tree > http://www.opensource.apple.com/source/llvmgcc42/llvmgcc42-2336.9/libstdc++… The libstdc++ policy based data structure (pb_ds) order statistic tree only has "set" behaviour. It takes a certain amount of extra work to use it as a replacement for multiset and multimap. They recommend using a set (tree) of lists to use pb_ds::tree like a multiset. However, this obviously doesn't work for order_statistic tree: each of the duplicates is only counted once (each list of duplicates is a single element in the tree). Does your order statistic tree allow duplicates? Leo Goodstadt

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[parameter] std proposal
by Lorenzo Caminiti 07 Jan '13

07 Jan '13

Hello all, Is there a C++ standard proposal for named parameter addition? I am looking for an "N-paper" for named parameters similar to N2081 for concepts, or N1962 for contracts. Thank you. -- Sent from my mobile device Lorenzo

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[CMake] current status of project
by Алексей Кутумов 07 Jan '13

07 Jan '13

Hello! I am new to boost community and i want to know about current status of "CMake modularization" project. I try to build boost according this page: https://svn.boost.org/trac/boost/wiki/CMakeModularizationStatus, and i`ve got some issues during configuring and building under win32, and i have some ideas how to fix them, but i didn`t see any activity since May 2012. I see Is this project alive?

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[utf8_codecvt_facet]
by Robert Ramey 06 Jan '13

06 Jan '13

change Revision: 81616 Author: marshall Date: 11:12:42 AM, Wednesday, November 28, 2012 Message: Fixed incorrect 'const' param for utf8_codecvt_facet::do_length ---- Modified : /trunk/boost/detail/utf8_codecvt_facet.hpp This change causes the a failure in the serialization library test suite with "test_utf8_codecvt" on all platforms which use the gcc standard library. I'm not sure what motivated the change or what it addressed but I'm pretty sure it's causing this (and a couple other) test failures. Note that all the failures are related to usage of wchar_t - perhaps that helps. Note that the test is part of the serialization library test suite - but it has nothing to do with serialization per se and doesn't use any of the serialization library. It just happens to be there because there was no more convenient place to put it. Marshall - could you please look into this? Robert Ramey

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[Release][Spirit] Asking for approval to merge bugfix
by Hartmut Kaiser 06 Jan '13

06 Jan '13

Hey, I somehow missed to merge one commit from trunk to the release branch (see attached). May I commit this to fix a compilation problem in Spirit? The patch is very low risk as it just renames a parameter. Regards Hartmut --------------- http://boost-spirit.com http://stellar.cct.lsu.edu

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[Locale] Security bug announcement - UTF-8 validation
by Artyom Beilis 06 Jan '13

06 Jan '13

Hello, Boost.Locale library in Boost 1.48 to 1.52 including has a security flow. boost::locale::utf::utf_traits accepted some invalid UTF-8 sequences. Applications that used these functions for UTF-8 input validation could expose themself to security threats as invalid UTF-8 sequece would be considered as valid. This bug is fixed in upcoming Boost 1.53. For more details see: https://svn.boost.org/trac/boost/ticket/7743 Users who can't upgrade to the latest versions may apply the following patch to fix the problem. http://cppcms.com/files/locale/boost_locale_utf.patch Regards, Artyom Beilis -------------- CppCMS - C++ Web Framework: http://cppcms.com/ CppDB - C++ SQL Connectivity: http://cppcms.com/sql/cppdb/

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[config] MSCV 10 defines BOOST_NO_CXX11_HDR_TUPLE with a C++03 implementation
by Vicente J. Botet Escriba 05 Jan '13

05 Jan '13

Hi, The current implementation of boost::make_unique_locks needs a std::tuple with C++11 move semantics.* *MSCV 10 provides <tuple> and rvalue references so that BOOST_NO_CXX11_HDR_TUPLE and BOOST_NO_CXX11_RVALUE_REFERENCES are not defined. However I suspect that the implementation provided by <tuple> with this version is the one corresponding to TR1 and doesn't provide move semantics as the message in http://tinyurl.com/atjdoh3 could let think. Could someone confirm my suspicion?* *Is there a way to request MSVC 10 to not import TR1 files? Should BOOST_NO_CXX11_HDR_TUPLE be defined for MSVC 10 as it doesn't implements the c++11 semantics while BOOST_NO_HDR_TUPLE could be undefined? * *Best, Vicente ** Test output: id - thread - make_unique_locks__mutex_p / msvc-10.0 Rev 82343 / Thu, 3 Jan 2013 23:15:13 +0000 *Report Time: *Sat, 5 Jan 2013 12:53:31 +0000 Compile [2013-01-04 08:34:35 UTC]: fail call "C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\vcvarsall.bat" x86 >nul cl /Zm800 -nologo @"c:\boost\regression\trunk\results\boost\bin.v2\libs\thread\test\make_unique_locks__mutex_p.test\msvc-10.0\debug\threading-multi\sync\mutual_exclusion\locks\unique_lock\cons\make_unique_locks_mutex_pass.obj.rsp" make_unique_locks_mutex_pass.cpp c:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\INCLUDE\tuple(79) : error C2558: class 'boost::unique_lock<Mutex>' : no copy constructor available or copy constructor is declared 'explicit' with [ Mutex=boost::mutex ] c:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\INCLUDE\tuple(77) : while compiling class template member function 'std::tr1::_Cons_node<_Car,_Cdr>::_Cons_node(const std::tr1::_Cons_node<_Car,_Cdr> &)' with [ _Car=boost::unique_lock<boost::mutex>, _Cdr=std::tr1::_Cons_node<boost::unique_lock<boost::mutex>,std::tr1::_Cons_node<boost::unique_lock<boost::mutex>,std::tr1::_Tuple_type<std::tr1::_Nil,std::tr1::_Nil,std::tr1::_Nil,std::tr1::_Nil,std::tr1::_Nil,std::tr1::_Nil,std::tr1::_Nil,std::tr1::_Nil,std::tr1::_Nil,std::tr1::_Nil>::_Type>> ] c:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\INCLUDE\tuple(479) : see reference to class template instantiation 'std::tr1::_Cons_node<_Car,_Cdr>' being compiled with [ _Car=boost::unique_lock<boost::mutex>, _Cdr=std::tr1::_Cons_node<boost::unique_lock<boost::mutex>,std::tr1::_Cons_node<boost::unique_lock<boost::mutex>,std::tr1::_Tuple_type<std::tr1::_Nil,std::tr1::_Nil,std::tr1::_Nil,std::tr1::_Nil,std::tr1::_Nil,std::tr1::_Nil,std::tr1::_Nil,std::tr1::_Nil,std::tr1::_Nil,std::tr1::_Nil>::_Type>> ] ..\libs\thread\test\sync\mutual_exclusion\locks\unique_lock\cons\make_unique_locks_mutex_pass.cpp(41) : see reference to class template instantiation 'std::tr1::tuple<_Arg0,_Arg1,_Arg2,_Arg3,_Arg4,_Arg5,_Arg6,_Arg7,_Arg8,_Arg9>' being compiled with [ _Arg0=boost::unique_lock<boost::mutex>, _Arg1=boost::unique_lock<boost::mutex>, _Arg2=boost::unique_lock<boost::mutex>, _Arg3=std::tr1::_Nil, _Arg4=std::tr1::_Nil, _Arg5=std::tr1::_Nil, _Arg6=std::tr1::_Nil, _Arg7=std::tr1::_Nil, _Arg8=std::tr1::_Nil, _Arg9=std::tr1::_Nil * *

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[Range] Proposal: a sub-maintainer of Boost.Range
by Michel Morin 05 Jan '13

05 Jan '13

Dear Neil, Dear Nate, First I'd like to say thank you for your library, Neil. It is a very useful library and it's great fun to writing codes with range adaptors. Boost.Range is one of the most important Boost libraries that are not yet added to the Standard. I know that Neil has made an effort to make time for developing the library, but recently making time for development seems difficult. And there are several open tickets of trivial bugs (e.g. #5603, #6110). Considering this situation, I'd like to make a proposal about Boost.Range: ** Adding a sub-maintainer to Boost.Range ** This reduces author's maintenance burden and also helps more stable development of the library. I recommend Nathan Ridge as a sub-maintainer of Boost.Range. His knowledge, experiences and contribution to Boost are great. If both of Neil and Nate accept the proposal, and if Nate needs some support for the start-up, I'll try my best to support him. I also believe that Jeff will also support him ;) Neil, what do you think about this proposal? I would appreciate and respect any of your reply. Yours sincerely, Michel

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[smart_ptr] error with nullptr_t
by Vicente J. Botet Escriba 05 Jan '13

05 Jan '13

Hi, next follows a compile error with clang 3.1 c++11 just including #include <boost/shared_ptr.hpp> iMac-de-Vicente-Botet-Escriba:test viboes$ time bjam toolset=clang-3.1x ts_ -q ...patience... ...found 1100 targets... ...updating 50 targets... clang-darwin.compile.c++ ../../../bin.v2/libs/thread/test/test_so.test/clang-darwin-3.1x/debug/threading-multi/test_so.o In file included from ../example/test_so.cpp:6: In file included from ../../../boost/shared_ptr.hpp:17: ../../../boost/smart_ptr/shared_ptr.hpp:344:22: error: non-friend class member 'nullptr_t' cannot have a qualified name shared_ptr( std::nullptr_t ) BOOST_NOEXCEPT : px( 0 ), pn() // never throws ~~~~~^ ../../../boost/smart_ptr/shared_ptr.hpp:344:33: error: expected ';' at end of declaration list shared_ptr( std::nullptr_t ) BOOST_NOEXCEPT : px( 0 ), pn() // never throws ^ ;

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[Range] pop_front() / pop_back() docs for iterator_range?
by Olaf van der Spek 04 Jan '13

04 Jan '13

Hi, Where are pop_front() and pop_back() for iterator_range documented? Can't find them at http://www.boost.org/doc/libs/1_52_0/libs/range/doc/html/range/reference/ut… Am I looking in the wrong place or are they missing? -- Olaf

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Request permission to merge [82349]
by Peter Dimov 04 Jan '13

04 Jan '13

Release managers, May I please merge revision 82349 to release? It's a documentation update for shared_ptr.

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[Release managers] Permission to rollback Boost.Thread breaking changes
by Vicente J. Botet Escriba 04 Jan '13

04 Jan '13

Hi, I would like to apply the following patch to trunk and release branch to avoid the Boost.Thread breaking changes. * [@http://svn.boost.org/trac/boost/ticket/6229 #6229] Rename the unique_future to future following the c++11. * [@http://svn.boost.org/trac/boost/ticket/6266 #6266] Breaking change: thread destructor should call terminate if joinable. * [@http://svn.boost.org/trac/boost/ticket/6269 #6269] Breaking change: thread move assignment should call terminate if joinable. This will let us the time to discuss the best way to manage with this breaking changes. Is someone against this late change? Best, Vicente svn diff boost/thread libs/thread Index: boost/thread/detail/config.hpp =================================================================== --- boost/thread/detail/config.hpp (revision 82295) +++ boost/thread/detail/config.hpp (working copy) @@ -78,9 +78,9 @@ #define BOOST_THREAD_RVALUE_REFERENCES_DONT_MATCH_FUNTION_PTR #endif -// Default version is 3 +// Default version #if !defined BOOST_THREAD_VERSION -#define BOOST_THREAD_VERSION 3 +#define BOOST_THREAD_VERSION 2 #else #if BOOST_THREAD_VERSION!=2 && BOOST_THREAD_VERSION!=3 && BOOST_THREAD_VERSION!=4 #error "BOOST_THREAD_VERSION must be 2, 3 or 4" Index: libs/thread/src/win32/thread.cpp =================================================================== --- libs/thread/src/win32/thread.cpp (revision 82295) +++ libs/thread/src/win32/thread.cpp (working copy) @@ -12,7 +12,7 @@ #ifndef WINVER #define WINVER 0x400 #endif -#define BOOST_THREAD_VERSION 3 +//#define BOOST_THREAD_VERSION 3 #include <boost/thread/thread.hpp> #include <boost/thread/once.hpp> Index: libs/thread/src/pthread/thread.cpp =================================================================== --- libs/thread/src/pthread/thread.cpp (revision 82295) +++ libs/thread/src/pthread/thread.cpp (working copy) @@ -6,7 +6,7 @@ // Distributed under the Boost Software License, Version 1.0. (See accompanying // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -#define BOOST_THREAD_VERSION 3 +//#define BOOST_THREAD_VERSION 3 #include <boost/thread/detail/config.hpp> #include <boost/thread/thread.hpp>

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[1.53.0] Beta release candidates available
by Marshall Clow 04 Jan '13

04 Jan '13

Release candidate files for 1.53.0 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: d5a45d0e08a14d5fb0965fe675d76ac6 *boost_1_53_0_beta1_rc1.tar.gz 89a6084458cd9f0e136c4b5292265461 *boost_1_53_0_beta1_rc1.tar.bz2 2a8897e04c59ccaf39189568f6966d60 *boost_1_53_0_beta1_rc1.zip 4cdf5a71d46e1115ca0c413f5b139a54 *boost_1_53_0_beta1_rc1.7z Thanks, --The release managers

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[atomic] building with --layout=system, mingw, bug #7482
by Tim Blechmann 04 Jan '13

04 Jan '13

hi, i need some help with resolving issue #7482: for some reason it seems to build a static libboost_atomic, although it has to be a shared library. could someone with more insights in this platform have a look, what's going wrong (and why the library is static)? unfortunately i neither have access to mingw, nor am i too familiar with the boost build infrastructure ... thanks, tim

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Upgrade mailman to 2.1.15
by DongInn Kim 04 Jan '13

04 Jan '13

Dear All, If it is not too busy time tomorrow, can we upgrade mailman from 2.1.12 to 2.1.15? I am planning to upgrade it on Friday, Jan 4th, 2013 and it won't take long to upgrade it. Date: Friday, Jan 4th, 2013. Time: - 4:00am-4:10am Pacific US time - 5:00am-5:10am Mountain US time - 6:00am-6:10am Central US time - 7:00am-7:10am Eastern US time - 12:00pm-12:10pm GMT Please let me know if you have any questions or suggestions. Regards, -- - DongInn

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Release managers: Boost.Thread breaking changes in 1.53
by Vicente J. Botet Escriba 04 Jan '13

04 Jan '13

Hi, there has been some threads about the following Boost.Thread breaking change in release 1.53. "Breaking changes when BOOST_THREAD_VERSION==3 (Default value since Boost 1.53): There are some new features which share the same interface but with different behavior. These breaking features are provided by default when BOOST_THREAD_VERSION is 3, but the user can however choose the version 2 behavior by defining the corresponding macro. As for the deprecated features, these broken features will be only available until boost 1.55. * [@http://svn.boost.org/trac/boost/ticket/6229 #6229] Rename the unique_future to future following the c++11. * [@http://svn.boost.org/trac/boost/ticket/6266 #6266] Breaking change: thread destructor should call terminate if joinable. * [@http://svn.boost.org/trac/boost/ticket/6269 #6269] Breaking change: thread move assignment should call terminate if joinable. " I would like to request advise from the release managers and of course the Boost community. Should I rollback the default to BOOST_THREAD_VERSION==3 for 1.53 and let the time to discuss the best way to manage with these breaking changes? Best, Vicente

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[log] Most recent version
by Alexander Arhipenko 04 Jan '13

04 Jan '13

Hi, We're going to update boost.log sources in our code base. Could you please recommend what version to use? The code is taken from: https://boost-log.svn.sourceforge.net/svnroot/boost-log/. And currently I consider 3 options: branches/v1 branches/bleeding-edge trunk Thanks in advance. Regards

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[release] permission to merge xpressive bug fix
by Eric Niebler 03 Jan '13

03 Jan '13

Apologies, I forgot to merge this fix to release. Can I do it now? https://svn.boost.org/trac/boost/changeset/82103 It is to fix this: https://svn.boost.org/trac/boost/ticket/7809 -- Eric Niebler BoostPro Computing http://www.boostpro.com

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utf8_codecvt facet - volunteer opportuntiy
by Robert Ramey 03 Jan '13

03 Jan '13

Our implementation for a codecvt facet internal wide char to/from utf8 format requires some maintainence. We have our own implementation since 2001. Since then, the standard libary has come to specify some implementations and some libraries have implemented some or all of this aspect of the standard library. I've come to believe that we should: a) tweak our code to use the standard library implementations if they exist. b) tweak our code to use the names of the standard library implementation b) tweak our build so that our version replaces the the standard library implementation when and only when there is no standard implemenation available. This seemingly simple task is complicated by the following circumstances. a) The relationshp between UCS and Unicode is pretty confusing. b) The iterface for codecvt is confusing. c) a number of standard library implementations have non-conforming codecvt interface. d) a number of standard library implementations don't have any codecvt header at all. This is not a problem for our current implementation because we never import it. Anyone interested in working on this should contact Marshall, Beman or myself (in that precedance). Robert Ramey

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[config] Proposed BOOST_NOEXCEPT_NOTHROW macro
by Beman Dawes 03 Jan '13

03 Jan '13

The three current BOOST_NOEXCEPT* macro variants miss the case where C++03 code has a "throw()" throw-specifier. Classes that derive from standard library exceptions need this to avoid breaking code on C++03 compilers. I'm not enamored with the BOOST_NOEXCEPT_NOTHROW name, so feel free to offer suggestions for alternate names. Here is the full set of macros: #ifdef BOOST_NO_NOEXCEPT # define BOOST_NOEXCEPT # define BOOST_NOEXCEPT_NOTHROW throw() <---- new macro # define BOOST_NOEXCEPT_IF(Predicate) # define BOOST_NOEXCEPT_EXPR(Expression) false #else # define BOOST_NOEXCEPT noexcept # define BOOST_NOEXCEPT_NOTHROW noexcept <---- new macro # define BOOST_NOEXCEPT_IF(Predicate) noexcept((Predicate)) # define BOOST_NOEXCEPT_EXPR(Expression) noexcept((Expression)) #endif Unless there are objections, I'll commit the changes Wednesday afternoon Eastern US time. --Beman

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[xpressive] Broken in release if explicit operator bool is available
by Andrey Semashev 03 Jan '13

03 Jan '13

Hi, With the recent change to Boost.SmartPtr that adds support for explicit operator bool() Boost.Xpressive no longer compiles. The relevant error message is: ./boost/xpressive/detail/utility/tracking_ptr.hpp:440:73: error: no type named ‘unspecified_bool_type’ in ‘class boost::intrusive_ptr<boost::xpressive::detail::regex_impl<const char*> >’ Could this be fixed?

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Flow-based programming library for Boost?
by Marcus Tomlinson 03 Jan '13

03 Jan '13

Is there any interest out there for a library that allows you to create fast, efficient flow-based programs with an easy-to-use object-oriented interface? (http://en.wikipedia.org/wiki/Flow-based_programming) I've created an open-source library that does this, called "DSPatch" ( http://sourceforge.net/projects/dspatch) and would like to contribute it to the Boost Libraries. Please let me know if this sounds like something you'd like to see in Boost. Thanks!

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