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udp client
by Christer Borgqvist 27 May '12

27 May '12

Hi, I use the HTTP server 3 example, i want to dump all the request and response to a thread queue and using a udp client to send to syslog, how should i do that. / Christer

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logger progress?
by Victor Whiskey Yankee 26 May '12

26 May '12

Hello, How is the boost logger going for proper inclusion? Thanks, Vic

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Apple "Block" closures and boost::function
by John M. Dlugosz 26 May '12

26 May '12

I'm looking at using Apple's proprietary closure blocks as a substitute for C++ lambda functions on a project that needs to be portable between Mac (LLVM 3.1, but not using the C++0x dialect compiler switch) and Windows (Visual Studio 10). The project uses Boost.TR1 to supply std::tr1::function and related stuff on the Mac build. Now I found that the compiler handles the nonstandard block objects in Functor-like template situations in a manner perfectly analogous to C-style pointers to functions. I can even assign one to a boost::function with no complaint! The only issue seems to be that it never calls Block_copy/Block_release. So it works OK for passing them to STL algorithms that uses them on the spot, but will probably do bad things if used in general. Does anybody have something ready-made, to efficiently add the copy/destroy semantics to functors that hold such "blocks"? That would be much more efficient than wrapping them in another layer. Or, any pointers to the Boost innerds for doing that myself? Thanks, —John

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[Test] main for BOOST_TEST_DYN_LINK with manual registration
by Rhys Ulerich 25 May '12

25 May '12

What from example 15 from the Boost.Test "Manually registered test suites" documentation[1] needs to change if instead of #include <boost/test/included/unit_test.hpp> one used #define BOOST_TEST_DYN_LINK #include <boost/test/unit_test.hpp> ? >From reading [1] and [2], one needs to provide a main() that invokes the unit_test_main, but I'm at a loss for what it would look like... I don't think I'm running afoul of BOOST_TEST_ALTERNATIVE_INIT_API from reading <boost/test/unit_test.hpp> where the main() definition cares nothing about that #define, but I could be wrong. Help or a known-good example much appreciated, Rhys [1] http://www.boost.org/doc/libs/1_49_0/libs/test/doc/html/utf/user-guide/test… [2] http://www.boost.org/doc/libs/1_49_0/libs/test/doc/html/utf/user-guide/test…

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[container] Compilation failure with clang 3.1
by Alexandre Hamez 25 May '12

25 May '12

Hello, When compiling Boost.Container, clang 3.1 (stable release, Mac OS X 10.7.4) fails: > /opt/local/include/boost/container/allocator/allocator_traits.hpp:167:105: >> error: type name requires a specifier or qualifier > > template <typename T> using rebind_alloc = >> boost::intrusive::detail::type_rebinder<Alloc, T>::type; > > >> ^ > > /opt/local/include/boost/container/allocator/allocator_traits.hpp:167:59: >> error: expected ';' after alias declaration > > template <typename T> using rebind_alloc = >> boost::intrusive::detail::type_rebinder<Alloc, T>::type; > > ^ > > ; > > /opt/local/include/boost/container/allocator/allocator_traits.hpp:168:72: >> error: use of undeclared identifier 'rebind_alloc' > > template <typename T> using rebind_traits = allocator_traits< >> rebind_alloc<T> >; > > ^ > > /opt/local/include/boost/container/allocator/allocator_traits.hpp:168:85: >> error: 'T' does not refer to a value > > template <typename T> using rebind_traits = allocator_traits< >> rebind_alloc<T> >; > > >> ^ > > /opt/local/include/boost/container/allocator/allocator_traits.hpp:168:29: >> note: declared here > > template <typename T> using rebind_traits = allocator_traits< >> rebind_alloc<T> >; > > ^ > > /opt/local/include/boost/container/allocator/allocator_traits.hpp:168:87: >> error: expected ';' after alias declaration > > template <typename T> using rebind_traits = allocator_traits< >> rebind_alloc<T> >; > > However gcc 4.7 has no problem with it. Does anyone has experienced the same thing and possibly found a workaround? Thank you! Alexandre Hamez

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Spirit, StateChart, MSM
by asif saeed 25 May '12

25 May '12

Hi, What are the differences between these three libraries? I feel I can use any of these libs. Is there any page where the comparison/pros&cons are listed and so on? Best regards, Asif

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[msm] Two identical orthogonal regions?
by Aurelian Melinte 25 May '12

25 May '12

Hi, I am trying to put two identical orthogonal regions in a state machine (each region would model a "channel" and I can have multiple such channels). One way I can think of is duplicating the states through typedefs and duplicating entries in the transition table. Is there a way to avoid this duplication? Regards, a.

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[Geometry] spatial linestring access along line
by Stephan Menzel 25 May '12

25 May '12

Hi all, before I begin, let me tell that geometry is not exactly my strong suite so please forgive my probably dumb question. I have started to work with boost geometry which, I find very neat, and assembled a line string. Now I basically need a method that gives me a point to a length value. Like when my linestring is 100 units long and I say give me the point at 3 I want the exact position of the point (coordinates) as if I were following the line for exactly 3 units. I have an approach that would allow me to implement this myself by following the segments (possibly after indexing them) but I have a feeling that one of those many functions provided by the library itself might do just that and I simply don't know it. If anyone knows if such is the case, would be nice to give me a heads up. Thanks, Stephan

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[multi_index] movable only types
by Szymon Gatner 25 May '12

25 May '12

Hi, with boost.move available are there any plans to make multi_index work with movable-only types? -- Szymon Gatner The Lordz Games Studio www.thelordzgamesstudio.com

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offlist - Re: [iterator] Problems with iterator_facade and const-qualification
by Neil Groves 24 May '12

24 May '12

On Sat, May 7, 2011 at 5:52 PM, Dave Abrahams <dave(a)boostpro.com> wrote: > On Fri, May 6, 2011 at 1:51 PM, Evan Driscoll <driscoll(a)cs.wisc.edu> > wrote: > > On 05/06/2011 11:59 AM, Jeff Flinn wrote: > >> > >> You might google any_iterator, and see how other authors have addressed > >> similar problems. > > > > Great! I tried to find someone who had done something similar, figuring I > > couldn't have been the first, but all the search terms I tried were too > > generic. > > > > Thanks, > > Evan > > You can find one in the ASL that's built on iterator_facade. > http://stlab.adobe.com/classadobe_1_1any__iterator.html > > The underlying Boost.Range implementation implements an any_iterator that I believe to be similar to the one in ASL in terms of functionality. I believe that the small-buffer optimization implementation is superior to forcing the definition of a closed-set of possible type as suggested in a TODO within the ASL documentation. During my performance testing I had considerably superior performance than the ASL implementation. I wondered if you disliked my implementation, or had any feedback. Additionally I wondered what you thought about moving the Boost.Range internal any_iterator implementation into Boost.Iterator. I can't honestly imagine a good use-case for using any_iterator in preference to any_range, hence I haven't suggested this previously. This could easily be due to my lack of imagination! Can you think of a time when using an any_iterator on any interface would be superior to using an any_range? Your opinions and guidance would be much appreciated. HTH, > > -- > Dave Abrahams > BoostPro Computing > http://www.boostpro.com Regards, Neil Groves

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