October 25, Pavia, Italy
November 6-8, Berlin, Germany
November 3-8, Kona, HI, USA
By Blog Staff | May 9, 2014 08:42 AM | Tags: intermediate
More from Marius Bancila and the <algorithm> factory:
Five new algorithms to C++11 that you should know about
by Marius Bancila
From the article:
C++11 added a bunch of new general purpose algorithms to the
<algorithm>header. In this article we will look at five of them that C++ developers should know about.
By Blog Staff | May 9, 2014 08:17 AM | Tags: intermediate
Still on the theme of "contiguous enables fast," a followup on the recent "Fast Polymorphic Collections" article:
Fast Polymorphic Collections with Devirtualization
by Joaquín M López Muñoz
From the article:
The
poly_collectiontemplate class we implemented for fast handling of polymorphic objects can be potentially speeded up in the case where some of the derived classes it manages are known to the compiler at the point of template instantiation...Allowing for the specification of a list of statically known derived class types as part of a
poly_collectioninstantiation opens up possibilities for internal performance optimizations that do not impact the usage interface of this template class. The actual improvements achieved depend very much on the compiler being used, but in general are greater when passing polymorphic functors (such as generic lambdas) tofor_eachand qualifying virtual functions asfinalwhere possible.
By Blog Staff | May 9, 2014 06:44 AM | Tags: intermediate
Another nice way to have a polymorphic collection without sacrificing that performance-precious contiguous memory layout:
Introducing emplacer: allocate subtypes of an abstract base class directly in a container
by Tim
From the article:
So I complained to my friend Jeremy that C++ should be able to do this. This isn't Java, I shouldn't have to do a separate allocation for each object...
As alluded to earlier, you can also use it in containers. Here's an example:
std::vector<ShapeAny> shapes; shapes.emplace(shapes.end())->emplace<Rect>(3, 4); shapes.emplace(shapes.end())->emplace<Square>(3); //emplace returns reference to *this, so you can use it like this too shapes.push_back(ShapeAny().emplace<Rect>(5, 6)); shapes.push_back(ShapeAny().emplace<Circle>(1)); for (auto shape: shapes) { std::cout << shape->area() << std::endl; }
By Blog Staff | May 9, 2014 06:34 AM | Tags: None
CppCon is now just 120 days away! The final program is expected to be available in late June, but in the meantime the organizers have shared a sneak peek at a partial list of speakers and topics for this year's event.
Program Update, Submission Deadline Reminder
by Boris Kolpackov
Speakers proposing talks so far include a nice mix of speakers -- not only the most widely known veteran C++ speakers and many active standards committee members, but also a range of speakers from industry and specific domains, and from all around the world forming a truly international cast:
That's just the start, and is already more than 3x the number of speakers there were at GoingNative.
From the talks submitted so far, we are seeing several popular topic themes, with multiple sessions in each of the following themes (with more themes to come):
Do you have a topic you could speak about for anything from 30 min to 3 hours? Submit a session proposal! The talk submission deadline is still open for at least another week. From the article:
While we already have some great content, we need more, so don’t forget to submit your proposal before the deadline, May 15. You only have one week left! To make the submission process smoother there is also the new, easier to use submission form.
Super Early Bird registration sold out, but Early Bird registration will be open until June 30. We look forward to seeing you with us in the hot crowd at this year's C++ fest in the beautiful Seattle area this September.
By Blog Staff | May 8, 2014 10:16 AM | Tags: basics
Stroustrup's introduction to programming book has now been updated for modern C++. The Preface was posted on InformIT:
Preface to Bjarne Stroustrup's Programming: Principles and Practice Using C++, 2nd Edition
by Bjarne Stroustrup
From the preface:
This book is for someone who has never programmed before but is willing to work hard to learn. It helps you understand the principles and acquire the practical skills of programming using the C++ programming language. My aim is for you to gain sufficient knowledge and experience to perform simple useful programming tasks using the best up-to-date techniques. How long will that take? As part of a first-year university course, you can work through this book in a semester...
By Blog Staff | May 8, 2014 08:05 AM | Tags: None
Note that the article doesn't mention to_string, which is the preferred C++11 way to convert an int to a string. But it does point out an issue -- you can assign an int to a string, including by accident.
Dangerous int-to-string conversions
by Andrzej Krzemieński
From the article:
And now, because
intis implicitly convertible tochar, our unexpected conversion frominttostd::string‘works’ (under some definition of ‘work’)...
By Blog Staff | May 8, 2014 06:17 AM | Tags: None
From the C++ Truths blog, with a creative use of std::tuple:
A tale of noexcept swap for user-defined classes in C++11
by Sumant Tambe
From the article:
I like my strong exception safety in my little copy-assignment operator so I don’t want my
swapto throw but I don’t want my program tostd::terminate()if an exception is really thrown. With all that in mind, I would rewrite theswapas follows...This is not unlike what’s proposed by others but there’s more. The static assert looks awful and looks redundant. There is already a standard library utility that does the same thing:
std::tuple. As mentioned before,std::tuple’sswapthrows if any member swap throws. We use it here to make our job a lot easier...
By Meeting C++ | May 8, 2014 06:03 AM | Tags: events conference community
I released most of the talks for this years Meeting C++ conference:
Meeting C++ 2014 - Talks
I have yet only published the talks where I could reach the speakers. So some more to come. The popular Track in the mainhall is also alreay known:
The schedule will be online around the beginning of June.
By Meeting C++ | May 7, 2014 03:11 AM | Tags: usergroup community basics
Again, a list of user group meetings for this month. In total its going to be 16 user groups meeting this month:
C++ User Group Meetings in May 2014
by Jens Weller
From the Article:
The Meetings
8th May C++ UG Aachen - SIMD Programmierung
8th May C++ UG Belgium
Parallelism in the C++ Standard, what to expect from C++17
Asynchronous Programming with futures and await
8th May C++ UG Dresden - C++ Memory Model
8th May C++ UG New York - Whats next for C++
13th May C++ UG Philadelphia - Profiling and Perfomance
14th May C++ UG San Francisco/Bay area
15th May C++ UG Malmö/Sweden - Battle of the build systems
19th May C++ UG Denver - CppNow, Eclipse Configuration, Qt Creator and more...
20th May C++ UG Berlin - C++ in the demo scene
21st May C++ UG Düsseldorf - Expression Templates
21st May C++ UG Hamburg
21st May C++ UG Seattle/Northwest - Agile Architecture
23rd May C++ UG Paris
Introspection et reflection en C++
Le SIMD en pratique avec boost SIMD
Clang & C++
27th May C++ UG Chicago
28th May C++ UG Heidelberg
28th May C++ UG San Francisco/Bayarea - C++Now tripreport
By Blog Staff | May 5, 2014 04:44 AM | Tags: performance intermediate efficiency
On the theme of "contiguous enables fast":
Fast Polymorphic Collections
by Joaquín M López Muñoz
From the article:
poly_collectionbehaves excellently and is virtually not affected by the size of the container. For n < 105, the differences in performance betweenpoly_collectionand a std::vector ofstd::unique_ptrs are due to worse virtual call branch prediction in the latter case; whenn > 105, massive cache misses are added to the first degrading factor.