July 2011 - Boost - lists.boost.org

auto_index is broken
by Dave Abrahams 16 Jul '11

16 Jul '11

It's constructing fstreams from basic_string, which isn't portable. Please see the errors listed here: http://bbot.boostpro.com/builders/Boost-gcc-linux-Integration/builds/56/ste… -- Dave Abrahams BoostPro Computing http://www.boostpro.com

2 1

Re: [boost] problems with the Random library in Boost v1.47
by Hongyu Miao 15 Jul '11

15 Jul '11

Hi, Steven Thanks for your reply. I'm using MSVC 2010, too. I met such problems when I generated a million random numbers with the mersenne_twister generator and OpenMP. I'm not sure whether v1.47 is thread safe, though. Here is the code triggered the memory access violation: int num_point = 1000; int n_para = 1000; boost::numeric::ublas::matrix<double> ui(num_point, n_para); #pragma omp parallel for shared(ui, num_point, n_para) private(i, j) for (i=0; i<num_point; i++) { for (j=0; j<n_para; j++) { ui(i,j) = unirand_real(0.0,1.0); } } Thanks, Jacky On 07/13/2011 11:35 AM, Hongyu Miao wrote: > Sorry to bother you with this. I met a problem with the Random library in > the latest release v1.47. > > <snip> > > However, when I adopted my code to v1.47, the following code failed due to > memory access violation after a number of function calls: > > double unirand_real(double a, double b) > { > // Create a random number generator engine > static boost::random::mt19937 rng_real(static_cast<unsigned > int>(std::time(0))); > > // select Uniform probability distribution > boost::random::uniform_real_distribution<> dist(a, b); > > // return random sample > return dist(rng_real); > } > > I will appreciate your help with this problem as right now I think the > Random library may have a bug. > I can't reproduce this problem with MSVC 2010. a) What compiler are you using? b) Can you provide a complete minimal test case that fails? In Christ, Steven Watanabe

3 2

[BGL] Contribute to the Boost Graph Library
by Camillo Anania 15 Jul '11

15 Jul '11

Hi all, I used BGL for around 6 months for my thesis (write a routing algorithm). I highly appreciate the BGL and I'm glad someone did it and generously gives their time to maintain/improve it. So now I would like to contribute to the development of the library and so give back something. Just a brief introduction to my profile: - a bachelor and a master in Computer Engineering - six months of experience using the BGL - good knowledge of C++ - great wish to improve my programming skills and master generic programming technique Can you please indicate me the steps I should do to start to actively help the development process? Thanks Camillo Anania

3 4

[Review] Type Traits Introspection library by Edward Diener starts tomorrow Friday 1
by Joel Falcou 15 Jul '11

15 Jul '11

According to the schedule, review for the Type Traits Introspection library by Edward Diener starts this friday and run till July 10th. =========== What is it? =========== The TTI library, which is an abbreviation for the 'Type Traits Introspection' library, allows a programmer to introspect at compile time the inner elements of a C++ type. The introspection process depends on specifying the name of the inner element by different macros for different types of elements, and then using a generated metafunction to determine whether that element exists within the enclosing type. The inner elements which can be introspected are type, class template, member data, member function, static member data, and static member function. The TTI library is based on the type_traits_ext portion of the Concept Traits Library, with improvements and additions, and also reproduces functionality ( without changing existing code ), for the purposes of completeness, from Boost.MPL regarding introspection of types and templates. The purpose of the library is to provide a consistent set of interfaces for doing compile-time introspection of a type, which other template metaprogrammers can use in their code. If you are at all interested in compile-time introspection of types, please take a look at the functionality of this library. =================== Getting the library =================== The library is available at http://svn.boost.org/svn/boost/sandbox/tti/ Note that this repository will be updated up to next thursday by Edward. =================== Writing a Review =================== The reviews and all comments should be submitted to the developers list, and the email should have "[TTI] Review" at the beginning of the subject line to make sure it's not missed. Please explicitly state in your review whether the library should be accepted. The general review checklist: - What is your evaluation of the design? - What is your evaluation of the implementation? - What is your evaluation of the documentation? - What is your evaluation of the potential usefulness of the library? - Did you try to use the library? With what compiler? Did you have any problems? - How much effort did you put into your evaluation? A glance? A quick reading? In-depth study? - Are you knowledgeable about the problem domain? And finally, every review should answer this question: - Do you think the library should be accepted as a Boost library? Be sure to say this explicitly so that your other comments don't obscure your overall opinion.

9 34

[TTI] Review Going On
by Joel Falcou 15 Jul '11

15 Jul '11

A small reminder to ask potential reviews for Edward Diener's TTI Library to do so as we are heading to the end of the review period on the 17 july. If you have comments, questions or just want to submit a review, feel free to do so.

1 0

Re: [boost] [Boost-users] The last (I think) of the Boostcon videos
by Pascal Dennerly 15 Jul '11

15 Jul '11

Definite +1 from me too! Although I'm still having problems viewing http://blip.tv/boostcon/haskell-the-pseudocode-language-for-c-template-meta…. Keeps on telling me "Sorry, this episode may have just been added to blip.tv and isn't quite ready to watch yet. Please try again later." Does anyone else see this? Pascal

3 2

[Spirit] bin_float parser
by Vitaly Budovski 15 Jul '11

15 Jul '11

Hi, Now that Boost 1.47 has been released, I'm hoping to get the following parsers added for the next version. Attempt #2, which has hopefully addressed all of the issues from the previous submission. Please see attached diffs and test case. Cheers, Vitaly

2 1

BOOST_DATE_TIME_NO_LIB
by gpolo1＠tampabay.rr.com 15 Jul '11

15 Jul '11

Without the #define, boost tries to automatically link with the appropriate library. It just so happens that my boost installation does not have this library. So I was wondering if I even need this library? Aren't all boost classes compiled via hpp. I #defined BOOST_DATE_TIME_NO_LIB in my header file and the program compiles and works fine. So what is the purpose of this definition. I am using boost 1.32 along with Visual Studio 6.0. I have compiled it on Linux successfully, but I have not ran it yet.

5 6

Query regarding Boost 1.47.0
by Kumar, Nilesh 15 Jul '11

15 Jul '11

Hi, I have read the Release notes. I wanted to confirm a few things with respect to Boost 1.47.0 : 1. Is RHEL 5.5 supported? 2. Is there a 64-bit support? Thanks and regards, Nilesh ---------------------------------------------------------------------- This message w/attachments (message) is intended solely for the use of the intended recipient(s) and may contain information that is privileged, confidential or proprietary. If you are not an intended recipient, please notify the sender, and then please delete and destroy all copies and attachments, and be advised that any review or dissemination of, or the taking of any action in reliance on, the information contained in or attached to this message is prohibited. Unless specifically indicated, this message is not an offer to sell or a solicitation of any investment products or other financial product or service, an official confirmation of any transaction, or an official statement of Sender. Subject to applicable law, Sender may intercept, monitor, review and retain e-communications (EC) traveling through its networks/systems and may produce any such EC to regulators, law enforcement, in litigation and as required by law. The laws of the country of each sender/recipient may impact the handling of EC, and EC may be archived, supervised and produced in countries other than the country in which you are located. This message cannot be guaranteed to be secure or free of errors or viruses. Attachments that are part of this EC may have additional important disclosures and disclaimers, which you should read. By messaging with Sender you consent to the foregoing.

3 2

TTI library review appeal
by Edward Diener 14 Jul '11

14 Jul '11

Congratulations to all those involved in getting Boost 1.4.7 out the door. Now that it is finished, please consider reviewing my TTI library if you are at all interested in template metaprogramming and type traits introspection. Eddie Diener

2 2