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October 25, Pavia, Italy
November 6-8, Berlin, Germany
November 16-21, Kona, HI, USA
By Meeting C++ | Jan 29, 2015 03:06 AM | Tags: tmp templates intermediate experimental advanced
A new video from Meeting C++ 2014:
Interactive Metaprogramming Shell based on Clang
by Ábel Sinkovics
From the talk description:
Developing metaprograms is hard and painful. Templight (http://plc.inf.elte.hu/templight/) supports the development and debugging of template metaprograms, but the code has to be recompiled after every minor change and tricks are needed to retrieve useful information about the result...
By Felix Petriconi | Jan 29, 2015 01:03 AM | Tags: intermediate basics
Eric Niebler gives in his recent blog post insights about iterators
To Be or Not To Be (an Iterator)
by Eric Niebler
From the article:
Way back in 1999, when the ink on the first C++ standard was still damp, Herb Sutter posed a GoTW puzzler in the still extant C++ Report (RIP): When Is a Container Not a Container? In that article, Herb described the problems of the now-infamous vector<bool>. According to the standard’s own container requirements, vector<bool> is not a container.
In a nutshell, it’s because vector<bool>‘s iterators claim to be random-access, but they’re not. Random-access iterators, when you dereference them, must return a real reference. They can only do that if the thing they point to really exists somewhere. But the bool that a vector<bool>::iterator points to does not exist anywhere. It’s actually a bit in a packed integer, and dereferencing a vector<bool>‘s iterator returns an object of some type that merely acts like a bool& without actually being a bool&.
By Blog Staff | Jan 28, 2015 08:42 PM | Tags: None
Today on MSOT:
Experimenting with a Proposed Standard Drawing Library for the C++ language
by Eric Mittelette
From the article:
Back in July, Michael McLaughlin, Herb Sutter, and Jason Zink submitted to the ISO an updated proposal to standardize a 2D Graphics API for the C++ programming language. The ISO C++ Committee will evaluate the proposal for the possible inclusion of these new features in the next versions of the specification.
Given MS Open Tech’s historical interest in cross-platform graphics development, we took a closer look. In an attempt to familiarize with the API from the perspective of a C++ developer, we developed a sample app that we just contributed to Michael’s github repository. In the sections below, we share some salient aspects of how this new crop of Graphics experiences built with “straight” C++ could be written, only a few years from now!
By Herb Sutter | Jan 28, 2015 12:43 PM | Tags: advanced
A new article from the Old New Thing:
The compiler can make up its own calling conventions, within limits
by Raymond Chen
From the article:
There are three parties to a calling convention. The function doing the calling. The function being called. The operating system. The operating system needs to get involved if something unusual occurs, like an exception, and it needs to go walking up the stack looking for a handler...
By Herb Sutter | Jan 28, 2015 12:38 PM | Tags: intermediate c++11
Joseph Mansfield discusses about an important topic in C++:
The lvalue/rvalue metaphor
by Joseph Mansfield
From the article:
Every expression in C++ is either an lvalue or an rvalue. This distinction is what makes something like
5 = x;invalid, as the expression 5 is an rvalue expression and so cannot appear on the left of an assignment...
By Herb Sutter | Jan 28, 2015 12:29 PM | Tags: intermediate c++14 c++11
Christophe Riccio gives us an interesting point of view for a library author and shares the latest status of some compilers:
January 2015 C++ Compilers Status
by Christophe Riccio
From the article:
...Finally, a last issue for adopting new C++11 features is simply our own ignorance of which feature is available on all the compilers we support. To resolve that problem, I made the followiong table listing all the C++ features and their support on Clang, GCC, ICC and Visual C++...
By Blog Staff | Jan 28, 2015 12:23 PM | 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: N4283
Date: 2015-01-26
Atomic View, revision 2
by Carter Edwards and Hans Boehm
Excerpt:
This paper proposes an extension to the atomic operations library [atomics] for atomic operations applied to non-atomic objects. The proposal is in three parts: (1) the concept of an atomic view, (2) application of this concept for atomic operations applied to members of a very large array in a high performance computing (HPC) code, and (3) application of this concept for atomic operations applied to an object in a large legacy code which cannot replace this object with a corresponding atomic<T> object.
By Adrien Hamelin | Jan 28, 2015 08:00 AM | Tags: intermediate c++11
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:
Data-Oriented Design and C++
by Mike Acton
Summary of the talk:
The transformation of data is the only purpose of any program. Common approaches in C++ which are antithetical to this goal will be presented in the context of a performance-critical domain (console game development). Additionally, limitations inherent in any C++ compiler and how that affects the practical use of the language when transforming that data will be demonstrated.
By Meeting C++ | Jan 28, 2015 02:45 AM | Tags: templates performance intermediate experimental efficiency advanced
A new video from Meeting C++ 2014!
Expression Templates Revisited
by Klaus Iglberger
From the talk description:
Since their invention in 1995, Expression Templates (ETs) have proven to be a valuable tool for many C++ template libraries. Especially numerics libraries quickly embraced them as salvation for the performance deficiencies of standard C++. This reputation as performance optimization...
By Meeting C++ | Jan 27, 2015 12:59 PM | Tags: performance parallelism openmp intermediate experimental efficiency concurrency advanced
A new video from Meeting C++ 2014
C++ SIMD parallelism with Intel Cilk Plus and OpenMP 4.0
by Georg Zitzlsberger
From the talk description:
Performance is one of the most important aspects that comes to mind if deciding for a programming language. Utilizing performance of modern processors is not as straight forward as it has been decades ago. Modern processors only rarely improve serial execution of applications by increasing their frequency or adding more execution units.
