Looks like no one has read the blog posts I sent earlier in this thread. The original author of libzmq explains his rationale for avoiding C++ very well in these two posts. Please read them.
http://250bpm.com/blog:4 <http://250bpm.com/blog:4> http://250bpm.com/blog:8 <http://250bpm.com/blog:8> Additionally, if you want to consider how to REWRITE libzmq, then look at how the original author of libzmq approached it. http://nanonmsg.org <http://nanonmsg.org/> He rewrote it in C and named it something else. It isn’t compatible with libzmq’s wire protocol but it should give some ideas on how to adjust the architecture. Look at the code for it. > On May 19, 2017, at 8:21 AM, BJovke . <[email protected]> wrote: > > I have a feeling that C++14 and C++17 are just improvements of C++11. > C++11 is the game changer, 14 and 17 don't bring ground breaking stuff. > > I would be also happy to contribute to C++11 libzmq but I'm not sure how much > stuff I can do. > I'm currently not familiar with inner workings of libzmq enough detailed to > be confident to rewrite it, although I'm reading the docs and code day by day. > My time to spend is questionable, sometimes I have a lot of time and > sometimes I cannot contribute for days or even weeks. > > There are also many aspects of libzmq which make it hard to adopt the code, > instead requiring complete rewrite: > > > > > 2017-05-18 20:29 GMT+02:00 Jens Auer <[email protected] > <mailto:[email protected]>>: > Hi, > > I would be happy to contribute to such a project, even if many users will > stay with the "old" code. For me, it is a great way to learn something. I > would also be happy to aim for C++14 or even C++17 once it is officially > released. I think structured bindings and the new if (init; condition) will > be very helpful. C++17 also has std::optional. > > Cheers, > Jens > > -----Ursprüngliche Nachricht----- > Von: zeromq-dev [mailto:[email protected] > <mailto:[email protected]>] Im Auftrag von Aram Santogidis > Gesendet: Donnerstag, 18. Mai 2017 10:57 > An: ZeroMQ development list > Betreff: Re: [zeromq-dev] Porting libzmq to C++11 > > Hi, > > a good reason to modernize the codebase, or even better to create a new > project ala libzmq11, is to help its evolution with new networking > technologies and software engineering practices. > > As an example, consider the difficulties many faced (including myself) in > extending ZeroMQ to support RDMA-based networking interfaces. The current > design and implementation is hostile to such extensions. > Honestly, C++98 or not, I think it still can be done but with major cost in > development effort and additional complexity to an already complex codebase. > > Moving to C++11 and beyond is not merely an argument of fashion, as some of > you implied, but it is vital for its future. > C++ and related technologies evolve and libzmq stays behind. New > developers are reluctant to contribute once they have a look at the current > design and implementation (old school C++ roughly speaking). > > Think for example when networking will be included in the standard, how much > ugly code that juggles platform differences could be eliminated from the > current implementation. Same applies for threading, which is in the standard > since C++11. > > I don't underestimate the importance (and the size?) of the current userbase. > I'm aware from first-hand experience about some fairly critical software that > relies on libzmq. > > I guess the idea is to create i) a new project in the ZeroMQ organization > that ii) implements ZMTP and iii) the non-depricated ZMQ socket types. The > public API of libzmq should be a subset of the > libzmq11 so that will facilitate the transition of users, in the long term, > that do not run on legacy systems. > > I will happily contribute to such an effort provided that there will be at > least one or two experienced members from the community that will join this > effort. > > Cheers, > Aram > > > > > > On 17.05.2017 16:54, BJovke . wrote: > > Well, you're right. There must be a good reason for such an undertaking. > > I too feel that C++11 itself is not good enough reason. > > Anyway there has to be enough people willing to contribute to it. > > > > I was just saying this because no idea should be discarded right away, > > but for sure there needs to be a valid need and reason for it. > > > > Greetings. > > > > 2017-05-17 16:15 GMT+02:00 Doron Somech <[email protected] > > <mailto:[email protected]> > > <mailto:[email protected] <mailto:[email protected]>>>: > > > > What will be the benefit from moving to C++11? And more important > > what is the benefit from having two projects? one supporting C++11 > > and one not? > > > > I think that maintaining two repositories is hard and not sure for > > what cause? > > > > Anyway, if some one want to do it, in the zeromq philosophy, please > > fork and add the project to the zeromq organization. > > > > On Wed, May 17, 2017 at 4:29 PM, <[email protected] > > <mailto:[email protected]> > > <mailto:[email protected] <mailto:[email protected]>>> wrote: > > > > > > > On May 17, 2017, at 7:56 AM, BJovke . <[email protected] > > <mailto:[email protected]> <mailto:[email protected] > > <mailto:[email protected]>>> wrote: > > > > > > Hello. > > > > > > Libzmq is not even fully C++ compliant: > > > - There's no exception handling. > > > - There are no RAII principles implemented. > > > - Parent/child object hierarchy is loose or not implemented, > > all of the burden of proper order of calls is on programmer. > > > > > > And so on... > > > > > > C++11 is really a remarkable feat of engineering and me > > personally like to see fully C++11 implemented software. > > > Unfortunately, for libzmq this would require substantial rewrite > > of the library. > > > > > > Maybe there's an option to create another parallel branch to > > existing libzmq or even create another product, for example "libzmq11"? > > > On the wire this could be 100% compatible with non-C++11 libzmq > > but there would be 0% chance to compile older projects with it. > > > > This is a good time to bring out some old blog posts. Martin > > Sustrik was the original developer of libzmq. He had some > > thoughts on why he should have written the library in C instead > > of C++. Here you go: > > > > http://250bpm.com/blog:4 <http://250bpm.com/blog:4> > > > > http://250bpm.com/blog:8 <http://250bpm.com/blog:8> > > > > > > > > _______________________________________________ > > zeromq-dev mailing list > > [email protected] <mailto:[email protected]> > > <mailto:[email protected] <mailto:[email protected]>> > > https://lists.zeromq.org/mailman/listinfo/zeromq-dev > > <https://lists.zeromq.org/mailman/listinfo/zeromq-dev> > > <https://lists.zeromq.org/mailman/listinfo/zeromq-dev > > <https://lists.zeromq.org/mailman/listinfo/zeromq-dev>> > > > > > > > > _______________________________________________ > > zeromq-dev mailing list > > [email protected] <mailto:[email protected]> > > <mailto:[email protected] <mailto:[email protected]>> > > https://lists.zeromq.org/mailman/listinfo/zeromq-dev > > <https://lists.zeromq.org/mailman/listinfo/zeromq-dev> > > <https://lists.zeromq.org/mailman/listinfo/zeromq-dev > > <https://lists.zeromq.org/mailman/listinfo/zeromq-dev>> > > > > > > > > > > -- > > > > Jovan Bunjevački. > > > > > > _______________________________________________ > > zeromq-dev mailing list > > [email protected] <mailto:[email protected]> > > https://lists.zeromq.org/mailman/listinfo/zeromq-dev > > <https://lists.zeromq.org/mailman/listinfo/zeromq-dev> > > > _______________________________________________ > zeromq-dev mailing list > [email protected] <mailto:[email protected]> > https://lists.zeromq.org/mailman/listinfo/zeromq-dev > <https://lists.zeromq.org/mailman/listinfo/zeromq-dev> > > _______________________________________________ > zeromq-dev mailing list > [email protected] <mailto:[email protected]> > https://lists.zeromq.org/mailman/listinfo/zeromq-dev > <https://lists.zeromq.org/mailman/listinfo/zeromq-dev> > > > -- > > Jovan Bunjevački. > _______________________________________________ > zeromq-dev mailing list > [email protected] > https://lists.zeromq.org/mailman/listinfo/zeromq-dev
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