Updates to my trip report

(this is an echo of what I also just posted on isocpp.org)

I wanted to add a few more things to my meeting trip report. I updated the trip report in-place, but for those who want to see the “diffs” I’ll also post just the new parts here as a standalone post:

There were 106 experts at this meeting, officially representing 7 nations. This meeting saw a recent-record number of papers, including over 120 in the pre-meeting mailing.

In addition to the other things I mentioned, we also approved several other interesting changes, including the following highlights:

  • Adopted N4230, which allows nested namespace definitions like namespace A::B::C { } as a convenient shorthand for namespace A { namespace B { namespace C { } } }.
  • Adopted N3922, which fixes the most common pitfall with auto and {}, so that auto x{y}; now deduces the sane and expected thing, namely the type of y. Before this, it deduced initializer_list which was unfortunate and surprising. So, fixed.
  • Adopted N4086, which removes trigraphs. Yes, we removed something from C++… and something that was inherited from C! But wait, there’s more…
  • Adopted N4190, and actually removed (not just deprecated) several archaic things from the C++ standard library, including auto_ptr, bind1st/bind2nd, ptr_fun/mem_fun/mem_fun_ref, random_shuffle, and a few more. Those are now all removed from the draft C++17 standard library and will not be part of future portable C++.

We also did work and made progress on a lot of other proposals, including modules. See the pre-meeting mailing for details about papers considered at this meeting.

7 thoughts on “Updates to my trip report

  1. Hi,

    Do you know any C++ free graphic library cross-platform? I know that at a C++ con you were talking about some C++ graphic library which are very easy to use. Is any of those libraries free? I remember showing a small presentation with planets made in 3D and everything was made by someone from an Arts College.

    Do you know any C++ free cross-platform libraries for Arduino? I want to buy one and play with it.

    I don’t work as a programmer and my C++ knowledge are not that big but I remained programming in C++. I tried Java or C# but my only love remained C++. I would like to improve my C++ skills (which are almost null) but I really don’t have any ideas of programs I can try to build. I mean I saw those presentations at a C++ con and I was like: this is the same C++ I use? :p Still I work in an area related with programming: I’m a automotive software tester.

  2. Though C++ is on top and they mention C++11, the following makes me think the might actually have been doing C: “Our C++ code does not use any specific C++ features such as objects.” If so, I wouldn’t be surprised if a real C++11 version were faster still.

  3. Great. I’m very curious to know what people at IBM have to say about trigraphs removal, they’ve been supporting the EBCDIC world for ages now. I would be happy to see N3920/39 adopted (shared_ptr/make_shared support for arrays) just for consistency with the unique- counterparts (well, I have first seen a good use for them when I had to interface to other people’s code known to return an array).

  4. That nested namespace shorthand is great :). On the other hand, it might encourage more use of nested namespaces, and that makes me sad :(

    Even better to see legacy things removed. I’d love to see things like C-style casts emit a warning as part of the standard. You’d suppress the warning in old translation units, but at least it’d discourage use in new code and for new programmers.

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