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Re: [boost] [contract] Released Contract Programming Library on SourceForge
by Andrzej Krzemienski 21 Mar '10

21 Mar '10

> I have released on SourceForge a library that implements Contract > Programming (a.k.a. Design by Contract(TM) ) for C++. I am considering > to submit this library to Boost (as Boost.Contract). > Comments? Hi, Just another thought for a tiny extension that came to my mind. I tried to use the block invariant as a regular assert: int main() { CONTRACT_ASSERT_BLOCK_INVARIANT( fee fee fee ); } This code compiles and works fine. This is because "disabling block invariants" means that the entire macro invocation will disappear, inclusive of the nonsense I wrote inside. We are used to it because this is how C-style asserts work, but one of the advantage of asserts over comments, as it is often advertised, is that the predicates are checked for syntactic and (to some extent) semantic correctness. But this is not the case if we disable the assertion macros. I believe, it would be useful if "disabling block invariants" meant no run-time overhead, but still checking syntactic correctness. It would be possible if the macro CONTRACT_ASSERT_BLOCK_INVARIANT( expression ); were replaced with something like: ... sizeof( expression ) ... then, the expression is not evaluated, but required to be correct. If the value of sizeof is not used it should be eliminated by the compiler. Obviously, the same would be applicable for all the other types of checks, Regards, &rzej

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GSOC 2010 : Boost.graph
by Chinmaya Poswalia 21 Mar '10

21 Mar '10

In boost.graph what would be better : a) Manipulate the original graph - it would save space(crucial for big graph) -if the user want he can copy the graph object to a new object and then feed into functions b) Generate a new graph - although space will be allocated but user has the opportunity to directly input the graph.

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GSOC 2010
by Chinmaya Poswalia 21 Mar '10

21 Mar '10

Hello, I want to enquire following things? 1) Who are the mentors and can i get there email-address? I was not able to find there names on the project list site.

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[Boost.Locale] More updates
by Artyom 21 Mar '10

21 Mar '10

Hello, Updates ------- I had uploaded updated version of Boost.Locale that includes few bug fixes and some cleanup of MSVC warnings so now it clearly compiles with /W3 under MSVC. Also some documentation updated. Docs: http://cppcms.sourceforge.net/boost_locale/html/ Tutorial: http://cppcms.sourceforge.net/boost_locale/html/tutorial.html Download (boost_locale-svn_r1112.zip): https://sourceforge.net/projects/cppcms/files/ Formal Review Request --------------------- I want to submit the library for formal review: - When can it be done? - Do I have to provide full BJam build before formal review (at this point it builds fine with CMake)? - Do you think that I should wait more, improve the library more and if so what exactly? Best, Artyom

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[proto] call for help with msvc-7.1
by Eric Niebler 21 Mar '10

21 Mar '10

A recent check-in of mine (https://svn.boost.org/trac/boost/changeset/60706) broke proto on msvc-7.1. For instance, see <http://tinyurl.com/yg5wgw5>. I don't have access to this toolset anymore. Is there anybody out there willing to give this problem a shot? Or is it time to drop support for this old compiler? -- Eric Niebler BoostPro Computing http://www.boostpro.com

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[Log] Pre-review questions
by Christian Holmquist 21 Mar '10

21 Mar '10

Hi, I'm currently attempting to convert parts of our production log system to using Boost.Log as part of my review. At first glance this looked like a trivial thing, since Boost.Log supports all features (and more!) than I would need to do this task. However, I can't find what I'm looking for in the docs and I wish to not poke around anymore in the Boost.Log code. Simple task 1 I've two source level attributes, System and Severity. I wish to create a log macro that takes these two arguments. enum System { SYSTEM_A, SYSTEM_B, }; enum SeverityLevel // I don't want to use the built-in severity enum, since need flexibility to add/remove levels. { FREQUENT, DEBUG, TEMP, INFO, WARNING, ERROR, }; void foo() { LOG(SYSTEM_A, INFO, "Hello cruel world" << "!"); } The above is not a complicated scenario and I should be able to quickly find an answer. Maybe I've just missed it..:) Simple task 2 Create a custom filter without using any Lambda magic. struct Filter { System sys; SeverityLevel sev; bool operator()(???) { // pseudo-code, since I don't know how to write this return Attributes["System"] == sys && Attributes["SeverityLevel"] >= sev; } }; Help appreciated, I would like to get to the more complicated parts.. / Christian

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[gil] Can not open test.jpg
by Mariusz Kwiczala 20 Mar '10

20 Mar '10

Hi, I cannot open test.jpg from boost_1_42_0\libs\gil\example\test.jpg I use below application: InfranView FireFox IE Windows tools: (Paint, WLXPhotoGallery ... ) Does it mean that GIL uses some special, jpg file format? :) Best regards, Mariusz

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Heaps and Queues for GSoC
by Thomas Mullaly 20 Mar '10

20 Mar '10

Hello my name is Thomas Mullaly and I am currently an undergraduate in Kent State's Computer Science department. I'm interested in submitting a proposal for this years Google Summer of Code for the Heaps and Queues project, but, first I was wondering if somebody could explain what the requirements are for this project. So I have a better understanding of the project when I write a proposal. -Thomas Mullaly

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[SoC] Call for Mentors
by Andrew Sutton 20 Mar '10

20 Mar '10

All, Boost is once again participating in the Google Summer of Code program. I'm looking to establish an official list of possible mentors for student projects. I have a list of people that have already offered to mentor this year and people who I think might offer to mentor based on their past participation :) but I thought it would be a good idea to do this a little more officially. If you are interested in mentoring a student this year, please send your me your gmail id (e.g., andrew.n.sutton) and a short description of the kinds of projects you would be interested in mentoring. The gmail id is required for me to invite you to be a mentor, as far as I can tell. Please note that mentors should be prepared to work with one student throughout the course of the summer. This typically means reviewing the student's work on a weekly basis and providing guidance by answering questions and suggesting improvements on their work. Thanks, Andrew Sutton andrew.n.sutton(a)gmail.com

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GSOC 2010
by Augustus Q Odena 19 Mar '10

19 Mar '10

Hi, My name is Augustus Odena. I'm really interested in a few of the project ideas that Boost has listed for Google Summer of Code (Heaps and Queues, Bits and Ints, Graph Connectives and Topology Generators). It was suggested to me by the Hints Page that I should join the mailing list - so I've done that. I'd really appreciate it if, whenever someone had the time, they could perhaps fill me in a little bit more on the details behind those projects and their relative merits. I'd be happy to provide any sort of information about myself that would be helpful. -- Thanks, Augie Odena

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