October 25, Pavia, Italy
November 6-8, Berlin, Germany
November 3-8, Kona, HI, USA
By Blog Staff | May 2, 2015 09:39 AM | Tags: None
C++ conformance updates for Visual C++:
C++11/14/17 Features In VS 2015 RC
by Stephan T. Lavavej
From the article:
Visual Studio 2015 RC is now available, so it's time for updated feature tables...
By Adrien Hamelin | May 1, 2015 07:59 AM | Tags: performance efficiency
While we wait for CppCon 2015 in September, we’re featuring videos of some of the 100+ talks from CppCon 2014. Here is today’s feature:
Lock-Free Programming (or, Juggling Razor Blades), Part I
by Herb Sutter
Summary of the talk:
Example-driven talk on how to design and write lock-free algorithms and data structures using C++ atomic -- something that can look deceptively simple, but contains very deep topics. (Important note: This is not the same as my "atomic Weapons" talk; that talk was about the "what they are and why" of the C++ memory model and atomics, and did not cover how to actually use atomics to implement highly concurrent algorithms and data structures.)
By Blog Staff | Apr 30, 2015 08:49 PM | Tags: None
Yesterday, Bjarne Stroustrup posted a draft note of his thoughts about the next C++ standard currently expect in 2017. In the following interview, Stroustrup answers further questions about his note:
Stroustrup: Thoughts on C++17 -- An Interview
by Sergio De Simone, InfoQ
From the article:
... Look inside most critical systems and gadgets and you’ll find some C++ inside. That, and being able to help science in a small way, through its software systems, motivates me. C++ is a tool meant to be used for building important artifacts.
By Jason Turner | Apr 30, 2015 11:26 AM | Tags: performance
Jason Turner discusses in his recent article the size of instantiated template code.
Template Code Bloat Revisited Smaller Makeshared
by Jason Turner
From the article:
Back in 2008 I wrote an article on template code bloat. In that article I concluded that the use of templates does not necessarily cause your binary code to bloat and may actually result in smaller code!
However, after spending the last few months optimizing and evaluating ChaiScript I've learned that the misuse of templates, particularly when inheritance is involved, can have a huge impact on code size.
By Marco Arena | Apr 30, 2015 12:48 AM | Tags: intermediate concurrency
A new blog post containing runnable code from the Italian C++ Community:
Serializing access to Streams
by Marco Foco
From the article:
Two or more threads were writing to cout using the form:
cout << someData << "some string" << someObject << endl;And one of the problems was that data sent from one thread often interrupted another thread, so the output was always messed up. [...] I started designing a solution by giving myself some guidelines, here listed in order of importance...
By Blog Staff | Apr 29, 2015 10:17 AM | Tags: None
New WG21 papers are available. If you are not a committee member, please use the comments section below or the std-proposals forum for public discussion.
Document number: N4489
Date: 2015-04-20
WG21 2015-04-24 Telecon Minutes
by Jonathan Wakely
By Blog Staff | Apr 29, 2015 09:10 AM | Tags: None
New WG21 papers are available. If you are not a committee member, please use the comments section below or the std-proposals forum for public discussion.
Document number: N4487
Date: 2015-04-28
Constexpr Lambda
by Faisal Vali, Ville Voutilainen, Gabriel Dos Reis
Excerpt:
This proposal suggests allowing lambda-expressions in constant expressions, removing an existing restriction. The authors propose that certain lambda-expressions and operations on certain closure objects be allowed to appear within constant expressions. In doing so, we also propose that a closure type be considered a literal type if the type of each of its data-members is a literal type; and, that if the
constexprspecifier is omitted within the lambda-declarator, that the generated function call operator beconstexprif it would satisfy the requirements of aconstexprfunction (similar to theconstexprinference that already occurs for implicitly defined constructors and the assignment operator functions).
By Blog Staff | Apr 29, 2015 08:34 AM | Tags: None
We normally wait until committee papers get "N" (permanent) numbers, but this one is an exception. It has also already been circulated to ISO C++ committee members in preparation for the next ISO C++ meeting that begins on Monday in Lenexa, Kansas, USA.
D4492: Thoughts About C++17
by Bjarne Stroustrup
From the paper:
This is a draft intended to focus a discussion at the Lexena committee meeting.
This is an extended version (based on feedback) of an internal committee standard reflector message that got so widely distributed and discussed that it would be a good idea to have it as a document. I have tried to remove distracting committee jargon. Thanks to people who took part in the reflector discussion or commented on the web. I have also added links. It is still a collection of thoughts aimed at stimulating a discussion, rather than a formal paper or a precise proposal.
The note was written for committee members, but “escaped into the wild.” Here are a few comments from the web: [Reddit] [The Register] [Hacker News]
As you see, people outside the committee also have strong opinions. Those opinions can depart radically from the ones I hear in the committee and from reality.
I am often asked “what will C++17 be?” and variations of “What will C++17 do for me?” ... [continue reading]
By Adrien Hamelin | Apr 29, 2015 08:00 AM | Tags: performance efficiency
While we wait for CppCon 2015 in September, we’re featuring videos of some of the 100+ talks from CppCon 2014. Here is today’s feature:
Another fundamental shift in Parallelism Paradigm?
by Michael Wong
Summary of the talk:
Another fundamental shift in Parallelism Paradigm? Sure. When was the last time you heard that before?
But seriously, as the number of threads/cores continue to increase, there is a growing pressure on applications to exploit more of the available parallelism in their codes, including coarse-, medium-, and fine-grain parallelism. OpenMP has been one of the dominant shared-memory programming models but is evolving beyond that with a new Mission Statement (no, really!) making it well suited for exploiting medium- and fine-grained parallelism.
OpenMP 4.0 exhibits many of these features to support the next step in both consumer, high-performance and exascale computing, with one of the world's first programming model for high-level language support for GPU/Accelerators and vector SIMD across not 1 but 3 high-level languages: C++, C, and that language whose name we dare not speak, but starts with F.
By Marco Arena | Apr 29, 2015 07:19 AM | Tags: community c++14
Cat is meowing! A new open source C++14 Functional Library has been released:
Cat: a C++14 Functional Library
by Nicola Bonelli
From the article:
Cat is a C++14 library, inspired by Haskell. Cat aims at pushing the functional programming approach in C++ to another level. [...] On one hand it works for filling the gap in the language with respect to functional programming. [...] On the other hand Cat promotes the use of generic programming with type classes, inspired by Category Theory.
