March 2015 - Boost - lists.preview.boost.org

boost regex recursive quesion
by 温西波 24 Mar '15

24 Mar '15

This is my first time to using maillist I'm learning to use boost::regex for a month , a few days ago I found a problem( maybe is my mistake ?) I construct a simple recursive regular expression: a(?0)? This regex contains a recursive call (?0). It should match a string with any arbitrary length filled with 'a' characters. regex_match only returns true for "a" and "aa", but failed to match "aaa" and any string longer than three characters. Why? I try it on boost 1.45 and 1.57 , both get same result . I had sent this question on stackoverflow , but had not get a answer now . Is there any flag should be used with regex_match to use recursive call ? Thank you .

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[rational] has no maintainers
by Peter Dimov 23 Mar '15

23 Mar '15

Currently, nobody has write access to Boost.Rational, and I see a number of open pull requests (mostly by John Maddock) lingering. John, would you like write access to it so that you can apply your suggested changes?

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BOOST_SYMBOL_VISIBLE
by Robert Ramey 23 Mar '15

23 Mar '15

I'm trying to get my MAC OS (Yosemite) to build the boost serialization library and I've having a problem. In a couple of tests, the program throws some exceptions. When this occurs I get a message something like "terminate called after throwing an instance of 'boost::archive::archive_exception'". I'm quite sure that I used to be able to do this without problem - as of a couple of months ago. I recently "upgraded" to Yosemite. My gcc-4.8.1 version I'm getting from HPC website. In the course of trying to figure this out, I've come upon boost documentation which explains BOOST_SYMBOL_VISIBLE which was new to me. It suggests that my code which looks like class archive_exception : public virtual std::exception { ... could be creating a problem. due to deriving from some other class which might be defined a runtime shared library. So I replaced it with: class BOOST_SYMBOL_VISIBLE archive_exception : public virtual std::exception { ... and I also tried class BOOST_SYMBOL_VISIBLE archive_exception : public virtual std::exception { ... This doesn't change anything so it looks like I'm barking up the wrong tree. Is there anyone here who might want to shed some light on this? Robert Ramey -- View this message in context: http://boost.2283326.n4.nabble.com/BOOST-SYMBOL-VISIBLE-tp4673673.html Sent from the Boost - Dev mailing list archive at Nabble.com.

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Bug in boost asio on mac
by Philippe Daouadi 23 Mar '15

23 Mar '15

Hi, I have had this bug on mac os Yosemite where I would call async_connect and my code would never be called back. I didn't have any answer to my bug report and I would like to be sure that it it is not lost. https://svn.boost.org/trac/boost/ticket/11070 Any suggestion or workaround is welcome. Cheers, Philippe -- *This email and any attachment thereto are confidential and intended solely for the use of the individual or entity to whom they are addressed.If you are not the intended recipient, please be advised that disclosing, copying, distributing or taking any action in reliance on the contents of this email is strictly prohibited. In such case, please immediately advise the sender, and delete all copies and attachment from your system.This email shall not be construed and is not tantamount to an offer, an acceptance of offer, or an agreement by Aldebaran Robotics on any discussion or contractual document whatsoever. No employee or agent is authorized to represent or bind Aldebaran Robotics to third parties by email, or act on behalf of Aldebaran Robotics by email, without express written confirmation by Aldebaran Robotics’ duly authorized representatives.* ------------------------------ *Ce message électronique et éventuelles pièces jointes sont confidentiels, et exclusivement destinés à la personne ou l'entité à qui ils sont adressés.* *Si vous n'êtes pas le destinataire visé, vous êtes prié de ne pas divulguer, copier, distribuer ou prendre toute décision sur la foi de ce message électronique. Merci d'en aviser immédiatement l'expéditeur et de supprimer toutes les copies et éventuelles pièces jointes de votre système.* *Ce message électronique n'équivaut pas à une offre, à une acceptation d’offre, ou à un accord d'Aldebaran Robotics sur toute discussion ou document contractuel quel qu’il soit, et ne peut être interprété comme tel. Aucun employé ou agent d’Aldebaran Robotics n'est autorisé à représenter ou à engager la société par email, ou à agir au nom et pour le compte de la société par email, sans qu’une confirmation écrite soit donnée par le représentant légal d’Aldebaran Robotics ou par toute autre personne ayant reçu délégation de pouvoir appropriée.*

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Multiple-pattern string search algorithms
by meghana madhyastha 23 Mar '15

23 Mar '15

Hi all ! I noticed that Boost's algorithm module does not include multiple pattern string searching algorithms such as the Rabin Karp algorithm and Aho-Corasick algorithm. I think these algorithms are very useful and should be implemented in the library. If no one is currently working on them, I am willing to implement them. Please let me know your opinion. Regards, Meghana

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Enhanced Vector and Deque Competency Test
by Islam Taha 23 Mar '15

23 Mar '15

Hi all I’m sorry with inconvenience with my last mail, it’s just my first to write in a mail list. I’ve fixed some issues with my code but now it may run completely, I would be thankful if anyone has some free time to give a feedback to my fixed code and tell me if any issues. code https://github.com/islam-taha/stdVector/blob/master/vector.cpp <https://github.com/islam-taha/stdVector/blob/master/vector.cpp> . thanks in advance Islam

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transforming ex. boost lib into C++11-only lib?
by Oliver Kowalke 23 Mar '15

23 Mar '15

Hello, is it permitted to transform an existing boost library into a C++11-only library? best, Oliver

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[endian] Testing floating point interoperability
by Beman Dawes 23 Mar '15

23 Mar '15

On Fri, Jan 30, 2015 at 5:25 AM, Paul A. Bristow <pbristow(a)hetp.u-net.com> wrote: > > >> * Anything else that you can think of to improve FP support. > > The proof of the pudding is in the eating. > > I'd suggest that *testing interoperability* is the key precaution that you should advise. I'm starting to write a caution to go in the release, and will make that point. A new test, "floating_point_test", has been added to the endian test suite. It will focus on interoperability. (I know that you are talking about users testing their application needs, but I want to test Boost.Endian to be able to warn users of areas where there are known issues.) > It should obviously be between all possible combinations of processor hardware types. It isn't just processor types. std::numeric_limits<float>::signaling_NaN() representation is 0x7fc00001 for Microsoft/Dinkumware, but is 0x7fa00000 for gcc and clang:-( > The test should include a range of floating-point values from min to max, > and include NaN and infinity unless it is certain that they will never occur. To get started, floating_point_test.cpp is testing float and double: numeric_limits<>::min() numeric_limits<>::max() numeric_limits<>::lowest() numeric_limits<>::epsilon() numeric_limits<>::round_error() numeric_limits<>::infinity() -numeric_limits<>::infinity() numeric_limits<>::quiet_NaN() numeric_limits<>::denorm_min() 0.0 -0.0 1.0 -1.0 native uint32_t 0x12345678U as a float native uint64_t 0x0123456789abcdefULL as a double pi<>() Are there other specific values worth testing?> (Unless very special precautions are taken, then infinity and NaN are like to rear their ugly heads > at some time - probably when you least want to see them!) > > It must be possible to 'round-trip' all floating-point values. That's one of the tests performed on each value. > You can't test all possible values (except for 32-bit float - 64-bit double takes about 50 years at > current processor speeds ;-) > but you can chose values (floating-point bit patterns) at random for a test lasting some minutes or > even hours. Could you provide the random number generation and otherwise help with this? I've only ever used integer RNGs. Thanks, --Beman

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GSoC project
by Lulu C. Li 23 Mar '15

23 Mar '15

Hi! I wish to participate in GSoC this summer and I am very interested in Boost, in particular concurrent hash tables project. I am familiar with STL and worked on synchronization problems and concurrent processes in C. I can work on all the functionalities mentioned. What are other features that I should know for this project and proposal? Lulu

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Test Runner: teeks99-08f - msvc-14.0 - Extra Define
by Tom Kent 23 Mar '15

23 Mar '15

The Test runner teeks99-08f has been running the msvc-14.0 - CTP 6 release for a bit now. It runs with the extra bjam option "define=BOOST_MSVC_ENABLE_2014_JUN_CTP". Is this still necessary? I was going through and updating some settings and I notices this was still there and was trying to decide if I should clean it up or not. Thanks, Tom

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