January 2014 - Boost - lists.preview.boost.org

[config] Removing support for old compilers: do we have a consensus yet?
by John Maddock 30 Jan '14

30 Jan '14

Folks, As you know Boost.Config has had it's support for old compilers stripped out, and this is a controversial change. We're now at the point where I'd really like to get the routine changes/updates into release, but to do that we need a final decision on whether to keep (and release) Steven Kelly's changes in develop. So do we have a final decision? Thanks, John.

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[fusion] preprocess target pull request
by Eric Niebler 29 Jan '14

29 Jan '14

https://github.com/boostorg/fusion/pull/1 I'm not sure who gets notified of pull requests, if anybody. Sending mail for good measure. -- Eric Niebler Boost.org http://www.boost.org

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[offtopic] C++Now 2014 - hotel room available
by Hartmut Kaiser 29 Jan '14

29 Jan '14

I apologize for posting off-topic. Hey all, Unfortunately I will not be able to come to C++Now this year. However I already booked my hotel room at the Aspen Meadows (at the early bird rate!). If anybody is interested in using the hotel reservation, please get in contact with me offline. Thanks! Regards Hartmut --------------- http://boost-spirit.com http://stellar.cct.lsu.edu

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[git][predef] Pull fails
by Andrey Semashev 27 Jan '14

27 Jan '14

Hi, I checked out Boost on my Windows machine quite some time ago and today I tried to update it. I did: git submodule foreach git checkout develop git submodule foreach git pull The last command failed on Boost.Predef (log attached). I did not change it and I don't understand why there is conflict. I tried 'git reset --hard' and pull again, but it fails again the same way. How can I fix it?

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Re: [boost] Interest in Base2/16/32/64 Encoding Library?
by PB 27 Jan '14

27 Jan '14

On Fri, Jul 6, 2012 at 9:13 PM, Thomas Kemmer <tkemmer(a)computer.org> wrote: > Dear Boost Developers, > > I would like to know if there is interest in incorporating a generic > Base2/16/32/64 encoding library into Boost. > > I am the author of such a libray, hosted at > > http://code.google.com/p/stlencoders/ > > and would be willing to contribute and make the effort of > "Boostifying" it, if the Boost community is interested in such a > thing. > > There have been several suggestions for a Base64 encoding library on > this mailing list in the past. Most of them have been dismissed, since > Boost already provides a Base64 implementation with > Boost.Serialization's "Dataflow Iterators". Though I appreciate the > dataflow iterator's design, from personal experience I think that for > the basic task of encoding/decoding, a higher-level interface, e.g. > one that takes padding and intermittent whitespace (MIME) into > account, would benefit many developers. > > Currently, the stlencoders library > > - implements the Base16, Base32 and Base64 encoding schemes as defined > in RFC 4648. Base2, i.e. binary encoding, is also supported. > - implements encoding and decoding operations as generic algorithms > that operate on STL-style iterators > - supports different encoding alphabets using custom traits classes > - supports different character types > - lets the user define if/which non-alphabet characters should be > ignored via predicates > - provides reasonable performance that matches most "plain C" > implementations > > stlencoders is currently designed as a stand-alone library with no > dependencies on Boost (or anything but C++03); it would therefore take > some effort and guidance from the community to properly integrate it > with the rest of Boost. I would therefore appreciate any feedback > regarding your interest in this. > > Kind Regards, > > Thomas > > _______________________________________________ > Unsubscribe & other changes: > http://lists.boost.org/mailman/listinfo.cgi/boost > I know this was over a year ago, but I need to do some base64 encoding/decoding and wish Boost offered it at the outer level (as opposed to using internals of a library). Regards, Pete

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Boost candidate similar to asyncplusplus
by Rodrigo Madera 27 Jan '14

27 Jan '14

Hello, I was wondering if there is anything similar to asyncplusplus [1] here in Boost land. I just found out about the library and I specially liked the task chaining syntax [2]: --- async::spawn([] { return 42; }).then([](int result) { return result; }).then([](task<int> parent) { std::cout << parent.get() << std::endl; }); --- This is something I would love to see in Boost. So I ask: 1) Are there any similar Boost candidates for task scheduling? 2) If not, is ASIO up to this with some adaptation? I felt specially inclined to ask this here because of all the discussion taking place over the recently reviewed Fibers library and the fundamentals of asynchronous processing. Very interesting thoughts being discussed there. And something more higher level (but not necessarily IO bound) might be helpful. Best regards, Rodrigo Madera [1] https://github.com/Amanieu/asyncplusplus [2] https://github.com/Amanieu/asyncplusplus/wiki/Tutorial

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[github] boostorg/boost not listed?
by Joaquin M Lopez Munoz 26 Jan '14

26 Jan '14

Hi, After some recent aesthetic changes to https://github.com/boostorg , the repository boostorg/boost does not get listed in either of https://github.com/boostorg https://github.com/boostorg?page=2 https://github.com/boostorg?page=3 https://github.com/boostorg?page=4 https://github.com/boostorg?page=5 https://github.com/boostorg?page=6 even though it certainly exists and can be searched and found through the "Find a repository..." editbox. Before these latest changes to the web, boostorg/boost usualliy appeared #1 in the list as it quickly autoupdated after any subproject did. Thank you, Joaquín M López Muñoz Telefónica Digital

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[atomic] Probable documentation issue: how do we know atomic is safe and/or efficient?
by John Maddock 26 Jan '14

26 Jan '14

I'm looking to use Boost.Atomic for the double-checked-locking-idiom, but I'm having trouble discovering a) Whether the library is correctly implemented. b) How efficient (or otherwise) the library is on various platforms. I'm sure the answer to (a) is that it is correct, but I was surprised that atomic<int> relied on the volatile modifier for thread safe load/stores on MSVC, I had assumed that something more than that would have been required, but I know I'm out of date on this stuff! I can't help thinking that questions like this could be allayed by better documentation - specifically what operations are used to ensure correctness on each supported platform, plus rationale and/or link to reference material. My apologies if this has been covered already in the review, and I realize that documentation is a lot of work, but I can see no way to ensure correctness other than through code inspection, so proper documentation is essential in that case. Regards, John.

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[predef] Suggestion for Boost itself to start using this.
by Fletcher, John P 25 Jan '14

25 Jan '14

I have started to use the Boost predef library. I think it will be a good idea for this to be used within Boost. This is actually contained in the Future Work section of the Boost predef manual. http://www.boost.org/doc/libs/1_55_0/libs/predef/doc/html/predef/introducti… * And obviously there's lots of work to do in reformulating the existing Boost libraries to use the Predef library once it's accepted. I have been attempting to make use of it and one of the problems is that BOOST_VERSION itself is not consistent with it. It would I think break a lot of existing code to change BOOST_VERSION. Instead I suggest having another define a longside it which is consistent with Boost predef. I wnt to make the following suggestions to go into the definition of the version. First check that the version of Boost is recent enough. 1.55.0 is the first to have Boost predef. #include <boost/version.hpp> #if BOOST_VERSION >= 105500 #include <boost/predef.h> #define BOOST_HAVE_BOOST_PREDEF #endif #include <iostream> #include <string> #include <sstream> Then if that is true then construct a new defintion: #ifdef BOOST_HAVE_BOOST_PREDEF #ifdef BOOST_VERSION // The following translates BOOST_VERSION to a BOOST_VERSION_NUMBER!! // BOOST_VERSION % 100 is the patch level // BOOST_VERSION / 100 % 1000 is the minor version // BOOST_VERSION / 100000 is the major version #define BV BOOST_VERSION #define BVN BOOST_VERSION_NUMBER(BV / 100000,BV / 100 % 1000,BV %100) #define BOOST_VERSION_VERSION BVN #undef BVN #undef BV #endif Other libraries can also construct new version codes. John Fletcher

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Re: [boost] [Boost-testing] DrWeb regression test server is going down
by Beman Dawes 25 Jan '14

25 Jan '14

On Thu, Jan 23, 2014 at 5:24 PM, Sergey Cheban <s.cheban(a)drweb.com> wrote: > Dear subscribers, > > Unfortunately, DrWeb regression test server (Visual C++ 9-12, Windows > server 2012) is going down. > Sorry to hear that, but thanks for all your past runs! Is this permanent or will it come back up at some point? --Beman

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