Comment Feed for Channel 9 - C++ and Beyond 2012: Alexandrescu, Meyers, and Sutter - Ask Us Anything http://media.ch9.ms/ch9/b9a8/44953fa1-c8ee-442f-8cc5-a45de97fb9a8/CppBeyond2012PanelAskUsAnything_220.jpg Channel 9 - C++ and Beyond 2012: Alexandrescu, Meyers, and Sutter - Ask Us Anything Here is the Ask Us Anything panel from C++ and Beyond 2012. Andrei Alexandrescu, Scott Meyers and Herb Sutter take questions from attendees. As expected, great questions and answers! Tune in! Table of contents (click the time codes ([xx:xx]) to hear the answers...): Message passing primitives in future versions of the standard... [00:00]Standardized unit testing framework... [02:55]std::async... [04:30]Standard modules proposal... [08:14]Keyword additions and the standard library... [09:35]Problems (and solutions) with exceptions... [12:50]Future of concepts... [22:34]std::thread and thread interruption... [23:03]When to use the auto keyword (and when not to...)... [25:03]More on auto (benefits of reduncancy, type conversion issues with bool to int?)... [29:31]const and multithreaded programming, in C++11 const means thread safe, too... [35:00]Yet more on auto (impact on rampant use and code readability/comprehension)... [42:42]Compiler type deduction information (compiler switch that prints out auto deduced type information)... [50:18]Printing out code for review that replaces auto with the actual type... [53:30]auto and dynamic memory allocation... [54:59]Useful, broadly-used concurrency libraries... [57:00] en Tue, 21 May 2013 16:02:31 GMT Tue, 21 May 2013 16:02:31 GMT Rev9 Re: C++ and Beyond 2012: Alexandrescu, Meyers, and Sutter - Ask Us Anything Excellent Q&A! Thanks Charles/Channel 9 and C++ gurus.

 

posted by C64

]]> http://channel9.msdn.com/Shows/Going+Deep/C-and-Beyond-2012-Scott-Andrei-and-Herb-Ask-Us-Anything#c634836064587290176 Tue, 18 Sep 2012 23:07:38 GMT http://channel9.msdn.com/Shows/Going+Deep/C-and-Beyond-2012-Scott-Andrei-and-Herb-Ask-Us-Anything#c634836064587290176 C64 Re: C++ and Beyond 2012: Alexandrescu, Meyers, and Sutter - Ask Us Anything Good to see these gentlemen back with another excellent session. Thank you Charles for bring us this!

That said, based on the content of this session, next year I suggest that there are two conferences: 'C++ & Beyond 2013' and 'Auto & Beyond 2013'... Amazed at just how much time 'auto' was given Wink

posted by tomkirbygreen

]]> http://channel9.msdn.com/Shows/Going+Deep/C-and-Beyond-2012-Scott-Andrei-and-Herb-Ask-Us-Anything#c634836105244505714 Wed, 19 Sep 2012 00:15:24 GMT http://channel9.msdn.com/Shows/Going+Deep/C-and-Beyond-2012-Scott-Andrei-and-Herb-Ask-Us-Anything#c634836105244505714 tomkirbygreen Re: C++ and Beyond 2012: Alexandrescu, Meyers, and Sutter - Ask Us Anything posted by Christian Semmler

]]> http://channel9.msdn.com/Shows/Going+Deep/C-and-Beyond-2012-Scott-Andrei-and-Herb-Ask-Us-Anything#c634836155172097406 Wed, 19 Sep 2012 01:38:37 GMT http://channel9.msdn.com/Shows/Going+Deep/C-and-Beyond-2012-Scott-Andrei-and-Herb-Ask-Us-Anything#c634836155172097406 Christian Semmler Re: C++ and Beyond 2012: Alexandrescu, Meyers, and Sutter - Ask Us Anything Much more to come! Big thanks to the three amigos for letting us air this great content on C9!

C

posted by Charles

]]> http://channel9.msdn.com/Shows/Going+Deep/C-and-Beyond-2012-Scott-Andrei-and-Herb-Ask-Us-Anything#c634836195189014153 Wed, 19 Sep 2012 02:45:18 GMT http://channel9.msdn.com/Shows/Going+Deep/C-and-Beyond-2012-Scott-Andrei-and-Herb-Ask-Us-Anything#c634836195189014153 Charles Re: C++ and Beyond 2012: Alexandrescu, Meyers, and Sutter - Ask Us Anything I didn't know there was so much to say about auto...

I guess it's up to tooling to show you what the type actually is.

posted by JohnSawyer

]]> http://channel9.msdn.com/Shows/Going+Deep/C-and-Beyond-2012-Scott-Andrei-and-Herb-Ask-Us-Anything#c634836407394822547 Wed, 19 Sep 2012 08:38:59 GMT http://channel9.msdn.com/Shows/Going+Deep/C-and-Beyond-2012-Scott-Andrei-and-Herb-Ask-Us-Anything#c634836407394822547 JohnSawyer Re: C++ and Beyond 2012: Alexandrescu, Meyers, and Sutter - Ask Us Anything Thanks for this.  Will there be more C++ and Beyond 2012 posted?  Thanks.

posted by AceHack

]]> http://channel9.msdn.com/Shows/Going+Deep/C-and-Beyond-2012-Scott-Andrei-and-Herb-Ask-Us-Anything#c634836574913825964 Wed, 19 Sep 2012 13:18:11 GMT http://channel9.msdn.com/Shows/Going+Deep/C-and-Beyond-2012-Scott-Andrei-and-Herb-Ask-Us-Anything#c634836574913825964 AceHack Re: C++ and Beyond 2012: Alexandrescu, Meyers, and Sutter - Ask Us Anything @AceHack: Indeed. Slowly but surely. Stay tuned!

C

posted by Charles

]]> http://channel9.msdn.com/Shows/Going+Deep/C-and-Beyond-2012-Scott-Andrei-and-Herb-Ask-Us-Anything#c634837064360418563 Thu, 20 Sep 2012 02:53:56 GMT http://channel9.msdn.com/Shows/Going+Deep/C-and-Beyond-2012-Scott-Andrei-and-Herb-Ask-Us-Anything#c634837064360418563 Charles Re: C++ and Beyond 2012: Alexandrescu, Meyers, and Sutter - Ask Us Anything

, Charles wrote

@AceHack: Indeed. Slowly but surely. Stay tuned!

C

Great !

 

posted by C64

]]> http://channel9.msdn.com/Shows/Going+Deep/C-and-Beyond-2012-Scott-Andrei-and-Herb-Ask-Us-Anything#c634837432726351851 Thu, 20 Sep 2012 13:07:52 GMT http://channel9.msdn.com/Shows/Going+Deep/C-and-Beyond-2012-Scott-Andrei-and-Herb-Ask-Us-Anything#c634837432726351851 C64 Re: C++ and Beyond 2012: Alexandrescu, Meyers, and Sutter - Ask Us Anything Early in the video, Herb Sutter mentions some email address that seems to be '...@cpp.org'. Was that it? Is it correct? The cpp.org site seems not to be related to C++ at all.

posted by haiva01

]]> http://channel9.msdn.com/Shows/Going+Deep/C-and-Beyond-2012-Scott-Andrei-and-Herb-Ask-Us-Anything#c634838302261971310 Fri, 21 Sep 2012 13:17:06 GMT http://channel9.msdn.com/Shows/Going+Deep/C-and-Beyond-2012-Scott-Andrei-and-Herb-Ask-Us-Anything#c634838302261971310 haiva01 Re: C++ and Beyond 2012: Alexandrescu, Meyers, and Sutter - Ask Us Anything @haiva01: This panel happened at the end of the event - it was the last session. Therefore, there will be talk of things discussed earlier in the event.

Have patience, for answers are in the wing.

C

PS: Andrei, is there a comma after therefore when it starts a sentence? Smiley

posted by Charles

]]> http://channel9.msdn.com/Shows/Going+Deep/C-and-Beyond-2012-Scott-Andrei-and-Herb-Ask-Us-Anything#c634838862328800374 Sat, 22 Sep 2012 04:50:32 GMT http://channel9.msdn.com/Shows/Going+Deep/C-and-Beyond-2012-Scott-Andrei-and-Herb-Ask-Us-Anything#c634838862328800374 Charles Re: C++ and Beyond 2012: Alexandrescu, Meyers, and Sutter - Ask Us Anything That would be std-discussion@isocpp.org

https://groups.google.com/a/isocpp.org/group/std-discussion

https://twitter.com/isocpp

http://s151836.gridserver.com/

So I guess this is the secret 'special announcement' of Herb Sutter ??? Scared

posted by felix9

]]> http://channel9.msdn.com/Shows/Going+Deep/C-and-Beyond-2012-Scott-Andrei-and-Herb-Ask-Us-Anything#c634840013432901196 Sun, 23 Sep 2012 12:49:03 GMT http://channel9.msdn.com/Shows/Going+Deep/C-and-Beyond-2012-Scott-Andrei-and-Herb-Ask-Us-Anything#c634840013432901196 felix9 Re: C++ and Beyond 2012: Alexandrescu, Meyers, and Sutter - Ask Us Anything
Thanks in advance
Dileep Balakrishnan

posted by Dileep Balakrishnan

]]> http://channel9.msdn.com/Shows/Going+Deep/C-and-Beyond-2012-Scott-Andrei-and-Herb-Ask-Us-Anything#c634906538476790006 Sun, 09 Dec 2012 12:44:07 GMT http://channel9.msdn.com/Shows/Going+Deep/C-and-Beyond-2012-Scott-Andrei-and-Herb-Ask-Us-Anything#c634906538476790006 Dileep Balakrishnan Re: C++ and Beyond 2012: Alexandrescu, Meyers, and Sutter - Ask Us Anything
Where do we get to see the concepts getting implemented strictly using C++11 language and library features? We will prefer a simple library to start using it right away.

We were referring to the famous paper "A Concept Design for the STL" by Dr. Bjarne Stroustrup et al., which inspired us to dive into Origin C++ Libraries, which is an implementation using C++11. We ended up collating the ideas with our experiments to put these into work in our book : "Foundation of Algorithms in C++11, Volume 1 : Using And Extending C++11, Boost And Beyond". But to go further, we need a complete set-up for C++11 concepts and Origin libraries are still very incomplete and experimental in nature.Can someone point to a library, which is put to practice? Any pointer will be very helpful.


To be clear, we do not mean "C++ Concepts & Axioms" which (as originally proposed) cannot be fully implemented as a library feature.


For example, the paper "A Concept Design of STL" proposes the following interface for the STL Algorithm "std::copy_backward":

template<BidirectionalIterator I, BidirectionalIterator Out>
requires IndirectlyCopyable<I, Out> Out copy_backward(I first, I last, Out result);



which cannot be implemented using just library features.

So we reduced it to look like the following :


template<typename I, typename I>
requires<IndirectlyCopyable<I, Out>() && Bidirectional_Iterator<I>()>
Out copy_backward(I first, I last, Out result);



This we were able to get it easily using sfinae feature : enable_if. But we are looking for something like this in a form of a full blown C++11 library.


Using template alias and sfinae, simulation of requires may look like :

#include <type_traits>
template <bool Condition, typename T = void>
using requires = typename std::enable_if<Condition, T>::type;



And the Conditions being passed to requires can be simulated using the language feature "constexpr" like:

template <typename I, typename Out>
constexpr bool IndirectlyCopyable() { ...}

template <typename I>
constexpr bool Bidirectional_Iterator() { ...}



So, all we are looking for a C++11 library, which fully implement C++11 Algorithms using Concepts as part of algorithm's interface as in :


template<typename I, typename I>
requires<IndirectlyCopyable<I, Out>() && Bidirectional_Iterator<I>()>
Out copy_backward(I first, I last, Out result);



or

template<typename I, typename I>
auto copy_backward(I first, I last, Out result)
-> requires<IndirectlyCopyable<I, Out>() && Bidirectional_Iterator<I>(), Out>;



or something similar. Origin C++ library has similar components in place, but it is still a work in progress. Boost.Contract(Contract++) takes a different approach to simulate the above.

Does any one know of any such library in use?

Thanks a lot in advance.

Cheers,
Algocoders
http://www.algocoders.com

posted by Algocoders

]]> http://channel9.msdn.com/Shows/Going+Deep/C-and-Beyond-2012-Scott-Andrei-and-Herb-Ask-Us-Anything#c634939553062684512 Wed, 16 Jan 2013 17:48:26 GMT http://channel9.msdn.com/Shows/Going+Deep/C-and-Beyond-2012-Scott-Andrei-and-Herb-Ask-Us-Anything#c634939553062684512 Algocoders Re: C++ and Beyond 2012: Alexandrescu, Meyers, and Sutter - Ask Us Anything
Thanks
Srikanth Kanchari

posted by Srikanth Kanchari

]]> http://channel9.msdn.com/Shows/Going+Deep/C-and-Beyond-2012-Scott-Andrei-and-Herb-Ask-Us-Anything#c634981579471668153 Wed, 06 Mar 2013 09:12:27 GMT http://channel9.msdn.com/Shows/Going+Deep/C-and-Beyond-2012-Scott-Andrei-and-Herb-Ask-Us-Anything#c634981579471668153 Srikanth Kanchari