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[gil] Is bit_aligned_pixel_iterator a standard conformant random access iterator?
by Christian Henning 01 Jun '10

01 Jun '10

Hi there, I'm having an interesting discussion over at the MSDN forums regarding compiler errors with MSVC10 that show up when using standard algorithms and bit_aligned images. Basically the question is why MSVC10 doesn't understand that bit_aligned_pixel_iterator is a random access iterator. For some reasons it thinks it's an input iterator and though std::copy, in this case, cannot find the correct copy implementation. One of the folks over at MSDN thinks that bit_aligned_pixel_iterator isn't implemented correctly with the interator_facade. He/She also thinks that iterator isn't fully standard compliant since it doesn't give a real reference but a proxy object instead when deferencing. I'm not sure if that's correct. Anyone knows if that's true or not. Here is the full text: http://social.msdn.microsoft.com/Forums/en-US/vcgeneral/thread/3c9eac4f-86e… In any event it seems I need to do some adjustment in the the gil code to have it working with my gil io extension and MSVC10. Right now I have the compiler errors all over my test suite. Regards, Christian

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[msm] Passing constructor arguments to submachine
by Michael.Herchel＠rohde-schwarz.com 01 Jun '10

01 Jun '10

Hi, As already explained in another thread, it is possible to pass constructor arguments to msm state machines (to the front end). Is it also possible to pass constructor arguments to submachines of a msm state machine? Or is there an other way in order to configure the inner submachine by calling some member methods from the outer state machine or therelike? Thanks, mikee

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[range_ex] proper attribution
by Eric Niebler 31 May '10

31 May '10

The history of range algorithms in Boost goes back a long way. I'd like to see http://tinyurl.com/2d778f4 reflect that. When I wrote my earlier incomplete RangeEx library, I was careful to acknowledge (http://tinyurl.com/2dwdrhg) that I had borrowed heavily from the Container Algorithms library first written by Jeremy Siek and Vladimir Prus. If, as seems likely, Boost.RangeEx owes a debt to my RangeEx library, that should be noted, as well as the debt owed to Jeremy and Vladimir. Thanks, -- Eric Niebler BoostPro Computing http://www.boostpro.com

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Multicore-BGL
by Giorgio Zoppi 31 May '10

31 May '10

Hi, we're intersted in how to optimize BGL on Multicore for adding our standard Bellman-Ford algorithms for optical networks. How do the current boost work on Multicore? BGL is thread-safe? Which parts are required to optimize? Cheers, Giorgio. -- Quiero ser el rayo de sol que cada día te despierta para hacerte respirar y vivir en me. "Favola -Moda".

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boost::log access violation with global objects destructors
by Philippe Vaucher 31 May '10

31 May '10

Hello, Boost.Log creates an access violation when global objects being destructed attemps to log something. The doc says that I have to keep a shared_ptr to the core, but even doing so doesn't seem to work. I created a simple testcase here: http://codepad.org/pr8fAiZ2 The access violation location changes when the code change so I'm not sure how to handle this. This happens on Windows XP with boost 1.43 and the latest boost.log source from the svn. Thanks in advance! Philippe

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[multiindex] internal scope_guard has changed access from public to protected
by Thorsten Ottosen 31 May '10

31 May '10

Hi Joaquín, I'm using the scope_guard from multi_index/detail/scope_guard.hpp. It seems like a revision has made the destructor and copy-constructor protected instead of private. This is in some sense more idiomatic, but it breaks a use that I have in my upcomming auto_buffer class. Basically I'm only constructing a scope_guard object when I know the code can throw, otherwise I construct a "null" scope_guard which is simply an instance of scope_guard_impl_base. Here's the code: namespace auto_buffer_detail { typedef boost::multi_index::detail::scope_guard_impl_base null_guard; } #define BOOST_AUTO_BUFFER_CONSTRUCTOR_SCOPE_GUARD() \ boost::has_nothrow_copy<T>::value ? boost::auto_buffer_detail::null_guard() : \ boost::multi_index::detail::make_obj_guard( *this, \ &auto_buffer::deallocate, \ buffer_, members_.capacity_ ) and use it like so: boost::multi_index::detail::scope_guard guard = BOOST_AUTO_BUFFER_CONSTRUCTOR_SCOPE_GUARD(); ... guard.dismiss(); Any chance you make the two members public again? -Thorsten

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Boost related events calendar
by vicente.botet 30 May '10

30 May '10

Hi, In http://www.boost.org/development/index.html, the section "Release Schedule" contains much more "Boost related events", maybe we can change the title. BTW, the release schedule for 1.44.0 is missing. Will the Bug Spring Week take place (June 5-13th)? If yes, can someone having the rights add this to the calendar? Best, _____________________ Vicente Juan Botet Escribá http://viboes.blogspot.com/

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[system] Heads up: Breaking changes
by Beman Dawes 30 May '10

30 May '10

Changeset 62313 brings Boost.System into closer conformance with the C++0x working paper (and FCD) with regard to the system_category and generic_category interface. Because system_category and generic_category change from constants to functions returning references, this is a breaking change. The fix is to change uses of "system_category" to "system_category()", and "generic_category" to "generic_category()". See https://svn.boost.org/trac/boost/changeset/62313 AFAIK, the only Boost library this change breaks is filesystem. The changeset includes fixes for it. Asio also uses System, but in a way that does not break AFAICT. Before committing the change, I tested system, filesystem, and asio locally on Windows and Linux. But given the possibility of unintended consequences, I thought a heads up to the list might be useful. I'll try to keep a close eye on regression tests as they cycle, but if anyone has any problems, please let me know. Thanks, --Beman

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[move] problem with msvc and BOOST_MOVABLE_BUT_NOT_COPYABLE
by Oliver Kowalke 30 May '10

30 May '10

I get an linker error (private: __thiscall X::X(class X &) is unresolved symbol) with msvc-9.0 on XP. AFAIL (docu) implementing the copy-ctor isn't required and passing values from static memeber functions are allowed. What's wrong? Oliver #include "stdafx.h" #include <boost/move/move.hpp> class X { private: BOOST_MOVABLE_BUT_NOT_COPYABLE( X); public: X(); static X create(); X( BOOST_RV_REF( X) other); X & operator=( BOOST_RV_REF( X) other); }; X::X() {} X X::create() { X x; return x; // passing value form static memeber-fn } X::X( BOOST_RV_REF( X) other) {} X & X::operator=( BOOST_RV_REF( X) other) { return * this; } int _tmain(int argc, _TCHAR* argv[]) { X x( X::create() ); return 0; } -- GRATIS für alle GMX-Mitglieder: Die maxdome Movie-FLAT! Jetzt freischalten unter http://portal.gmx.net/de/go/maxdome01

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https://svn.boost.org: SSL negociation failed
by vicente.botet 29 May '10

29 May '10

Hi, I'm getting this error while trying to commit Commit Commit failed (details follow): OPTIONS of 'https://svn.boost.org/svn/boost/sandbox/chrono/boost/chrono': SSL negotiation failed: SSL error: unknown protocol (https://svn.boost.org) I get the same error while I try to connect to https://svn.boost.org. Telling that the SSL version is is an old non secured one. Have others the same error or is just a problem in my configuration? Best, _____________________ Vicente Juan Botet Escribá http://viboes.blogspot.com/

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