October 2013 - Boost-users - lists.boost.org

How to choose which library version to choose?
by Michael Kragh Pedersen 10 Oct '13

10 Oct '13

I have downloaded and built the Boost library, as according to these instructions: http://theseekersquill.wordpress.com/2010/08/24/howto-boost-mingw/ I need to use the serialization library, so I looked at the stage\lib folder, only to 16 different library files! Some are named mt, some sd, some s or d, and some a combination thereof, all this following libboost_serialization-mgw48. Some are dll files and some are a files. I tried using –lboost_serialization, as I have seen this mentioned on a lot of forums, but Eclipse says it can’t find that library. So how on Earth am I supposed to figure out which of the many files to link to?!

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Serialization unsupported version, going from 1.47.0 to 1.54.0
by Robert Bielik 10 Oct '13

10 Oct '13

Hi all, Just updated to using boost 1.54.0 and I've gotten problems with my application serializing data with 1.54.0 and a server application deserializing with 1.47.0, using text archives. I noticed the thread http://stackoverflow.com/questions/6015339/boost-serialization-archive-unsu… however it seems only to be issue with binary archives ?? Ideas ? TIA /Rob

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Example calc4.cpp for others grammars
by Olivier Austina 10 Oct '13

10 Oct '13

Hi all, I would like to customize the example calc4.cpp at http://www.boost.org/doc/libs/1_47_0/libs/spirit/example/qi/compiler_tutori… the following grammar: G-------> { A+; C} A--------> {B; C} B--------->E (like arithmetic expression grammar in calc4.cpp) How to modifier this boost variant instruction for this grammar or there no need to change it: typedef boost::variant< nil , unsigned int , boost::recursive_wrapper<signed_> , boost::recursive_wrapper<program> > In general what to put in boost variant for specific grammar (or AST). Any suggestion is welcome. Thank you. Regards Olivier

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[Fusion] Simple transform not working in 1.54?
by Andrew 10 Oct '13

10 Oct '13

Hi, Can anyone shed any light on why this simple test case results in an instantiation of ‘struct inspect<boost::fusion::vector2<boost::fusion::detail::apply_transform_result<int>...' instead of the expected 'struct inspect<boost::fusion::vector2<int, int(double)>>' ? Sorry about the use of pastebin, boost.codepad.org is down. http://pastebin.com/kctYLfag

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Re: [Boost-users] Boost range iterator pointing to wrong element
by Giorgos Sermaidis 09 Oct '13

09 Oct '13

Dear Nate and Gavin, Thank you so much for such a detailed explanation! It is very clear now. boost-users-request(a)lists.boost.org wrote: >Send Boost-users mailing list submissions to > boost-users(a)lists.boost.org > >To subscribe or unsubscribe via the World Wide Web, visit > http://lists.boost.org/mailman/listinfo.cgi/boost-users >or, via email, send a message with subject or body 'help' to > boost-users-request(a)lists.boost.org > >You can reach the person managing the list at > boost-users-owner(a)lists.boost.org > >When replying, please edit your Subject line so it is more specific >than "Re: Contents of Boost-users digest..." > > >Today's Topics: > > 1. [thread] Test if a thread is running (Patrick Steele) > 2. Re: [thread] Test if a thread is running (Kim Barrett) > 3. Re: [thread] Test if a thread is running > (christoph.kliemt(a)pgxml.net) > 4. Type Erasure: Infinite loop when accessing an element of a > container of any<>, where the element is another container > (Alexandre Pretyman) > 5. Re: [boost] [1.55.0] Beta 1 Available (Rich E) > 6. Re: Boost range iterator pointing to wrong element (Nathan Ridge) > 7. Re: [thread] Test if a thread is running (Patrick Steele) > > >---------------------------------------------------------------------- > >Message: 1 >Date: Tue, 8 Oct 2013 17:15:05 +0100 >From: Patrick Steele <steele.patrick(a)gmail.com> >To: boost-users(a)lists.boost.org >Subject: [Boost-users] [thread] Test if a thread is running >Message-ID: > <CAFXDkHyrnTqijUc09otuNs7w+DwXSTue5eLh0-HZBvq+RH=HSg(a)mail.gmail.com> >Content-Type: text/plain; charset="iso-8859-1" > >boost = 1.54 >OS = Windows 7 >compiler = Visual Studio 2005 > >Hi, >in order to test if a boost.thread is running I used timed_join as per >http://stackoverflow.com/questions/1667420/how-can-i-tell-reliably-if-a-boo…, >which recommended that I should be able to call timed_join with a wait time >of 0 ie >bool isThreadRunning = ! m_Thread.timed_join( boost::get_system_time() ); >I have just upgraded to boost 1.54 to see that this no longer appears to >work and that the timed_join function is being deprecated. >Can you tell me how I should now check whether a thread is running please? >Thanks, >Patrick >

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Type Erasure: Infinite loop when accessing an element of a container of any<>, where the element is another container
by Alexandre Pretyman 09 Oct '13

09 Oct '13

Hi Boost list! After watching Sean Parent's lightning-talk "Inheritance is the base class of Evil" ( http://channel9.msdn.com/Events/GoingNative/2013/Inheritance-Is-The-Base-Cl…) I decided to try a similar example with Boost's Type Erasure library, but did not succeed. I created a vector of any<.., ostreamable<>,...>, implemented the stream operator to print this vector type and I can print its' elements. A problem arises, however, when I insert this vector as an element of a second vector. When I print the second vector I encounter an infinite loop ending with a stack overflow when accessing the vector type when it is an element of second vector. The example which demonstrates this behaviour follows attached on this message. I am using Boost 1.55 from the trunk with clang 3.2 from Apple, compiling it with the flags "-std=c++11 -stdlib=libc++" and linking with "-stdlib=libc++". I would be grateful if anyone could try this on your local boost version and compiler. Can anyone shed some light on why this happens? Regards, -- Alexandre Pretyman

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[thread] Test if a thread is running
by Patrick Steele 09 Oct '13

09 Oct '13

boost = 1.54 OS = Windows 7 compiler = Visual Studio 2005 Hi, in order to test if a boost.thread is running I used timed_join as per http://stackoverflow.com/questions/1667420/how-can-i-tell-reliably-if-a-boo…, which recommended that I should be able to call timed_join with a wait time of 0 ie bool isThreadRunning = ! m_Thread.timed_join( boost::get_system_time() ); I have just upgraded to boost 1.54 to see that this no longer appears to work and that the timed_join function is being deprecated. Can you tell me how I should now check whether a thread is running please? Thanks, Patrick

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Re: [Boost-users] [boost] 1.55.0 beta 1 release candidates available for testing
by Akira Takahashi 09 Oct '13

09 Oct '13

2013/10/8 Domagoj Saric <dsaritz(a)gmail.com> > On 3.10.2013. 18:19, Marshall Clow wrote:> Release candidate files for > 1.55.0 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. > > With MSVC12 RC: > * 1.54 and 1.55 b1 RC - lots of: > .\boost/iterator/detail/**facade_iterator_category.hpp(**166) : error > C2039: 'assert_not_arg' : is not a member of 'boost::mpl' > This issue fixed by this commit. http://lists.boost.org/boost-commit/2013/05/46330.php However, not merge to release branch yet.

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(Better) Compile time strings
by Rodrigo Madera 09 Oct '13

09 Oct '13

Is there any roadmap for the inclusion of C++11 compile time strings into Boost MPL (or a separate library) as mentioned in Abel Sinkovics and Dave Abrahams' article [1]? If so, any ideas for non-C++11 uses? Thanks, Rodrigo [1] http://cpp-next.com/archive/2012/10/using-strings-in-c-template-metaprogram…

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Utree tutorial
by Olivier Austina 09 Oct '13

09 Oct '13

Hi, I would like to learn how to build AST with utree. I am looking for some basic starting points as newbie in boost. Any suggestion is welcome. Thank you. Regards Olivier

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