Freestanding trip report: emBO++ and Jacksonville wg21 2018 experience-Ben Craig

By Adrien Hamelin | Mar 29, 2018 03:13 PM | Tags: experimental community

A good experience.

Freestanding trip report: emBO++ and Jacksonville wg21 2018 experience

by Ben Craig

From the article:

I'm the author of P0829, Freestanding Proposal. The tl;dr of the paper is that it standardizes a subset of the library suitable for kernel and embedded programming. R0 of this poorly titled paper was reasonably well received in the Albuquerque 2017 meeting. I was encouraged to send it out to a wider audience... and so I did. One of the people that I sent it to was Odin Holmes, and that got me an invitation to emBO++, my first speech at a public conference. This conference was the week prior to the Jacksonville meeting, so I ended up flying from Bochum to Jacksonville without going home first...

ISO C++ Committee – Jacksonville 2018, trip report -- Timur Doumler

By Anastasia Kazakova | Mar 29, 2018 06:53 AM | Tags: c++20

Timur Doumler has joined the CLion team in fall 2017. He continues to be active on the C++ Committee, as it fits well into JetBrains' strategy: our C++ team would like to be actively involved in the committee and feed our experience with implementing language features in our C++ tools back into the ongoing work on the evolution of the C++ language.

ISO C++ Committee – Jacksonville 2018 trip report

by Timur Doumler

From the article:

From the 12th to the 17th of March 2018, I travelled to Jacksonville, Florida, to attend the ISO C++ Committee meeting as JetBrains’ representative on the committee. I decided to focus on Evolution Working Group and cover the most relevant discussions concerning language evolution:

• Day 1: Structured bindings and concepts
• Day 2: Let’s break some code!
• Day 3: Coroutines and Modules
• Day 4: Compile-time programming
• Day 5: New Tooling Study Group
• Day 6: Plenary

CLion 2018.1 is released: more C++17, WSL, CMake Install, Fortran and Rust plugins -- JetBrains

By Anastasia Kazakova | Mar 29, 2018 06:52 AM | Tags: None

A new release is here!

Give Your Old C/C++ Code Some New Love -- Richard Thomson

By Legalize Adulthood | Mar 29, 2018 06:49 AM | Tags: None

This article explores how to modernize your legacy C/C++ code base, using an open source fractal renderer originally written in C and x86 assembly language as the case study.

Give Your Old Code Some New Love

by Richard Thomson

From the article:

If you’re not careful, entropy creeps its way into your code base. You take a shortcut or code something in a way that you know is sloppy and you say to yourself “I’ll come back to that later”, but later you’re faced with new feature requests or some other Imminent Disaster(tm) and you don’t go back and clean up the mess you made earlier. This is only natural in a code base and when the messes are few and far between, it is tolerable.

[...]

In this post, we’ll take a look at an open source project with a code base that is over 30 years old and has accumulated some “cruft” along the way. We’ll discuss various strategies for coping with the cruft and how to get rid of it in as safe a manner as possible. After all, we don’t want to introduce bugs while we clean up cruft.

PVS-Studio is now available on macOS: 64 weaknesses in the Apple's XNU Kernel

By Andrey Karpov | Mar 28, 2018 05:16 AM | Tags: xnu kernel static code analysis pvs-studio macos bugs

A new version of the PVS-Studio analyzer 6.23 is working under macOS, which allows you to check the projects written in C and C++. Our team decided to perform a XNU Kernel check to coincide it with this event.

PVS-Studio is now available on macOS: 64 weaknesses in the Apple's XNU Kernel

by Andrey Karpov

From the article:

Although the XNU Kernel is relatively small, it's a challenge to study the analyzer warnings alone, which takes much time. False positives make the check more complicated, since I haven't performed the preliminary analyzer configuration. I just quickly looked through the warnings, writing out code fragments that, in my opinion, represent interest. This is more than enough for writing a quite large article. PVS-Studio analyzer easily finds a large number of interesting bugs.

Emulating templated generic lambda expressions -- Krzysztof Ostrowski

By fj | Mar 25, 2018 11:36 PM | Tags: None

Embedding and recovering the type information in generic lambda expressions.

Emulating templated generic lambda expressions

by Krzysztof Ostrowski

From the article:

One of the greatest advantages of lambda expressions is their locality. It is really comfortable to reason about the code if the most of its parts are in the "near" scope, and the inversion of control is limited. On the other hand, optimiser's life is much easier with lambdas (they are just syntactic sugar, thus their actual structure is defined by the compiler). Moreover, lambdas' opaque mangled names can drastically reduce compile times. Parametrically polymorphic (generic) lambda expressions introduce additional flexibility in algorithm implementation and minimise maintenance work.

Paradoxically, generic lambda expressions in C++17 are somewhat too generic. That characteristic announces itself in inability to fix the lambda parameters in advance. Unlike in function templates, we cannot specify the parameter types explicitly to effectively disable template argument deduction from the passed function arguments.

Some steps towards templated generic lambdas are going to be taken in C++20. For the time being, a simple technique that emulates templated generic lambdas proposed in this article may be reused.

HPX V1.1 released -- STE||AR Group

By Hartmut Kaiser | Mar 24, 2018 07:20 AM | Tags: performance parallelism heterogeneous computing distributed computing c++17 c++14 c++11

The STE||AR Group has released V1.0 of HPX -- A C++ Standard library for parallelism and concurrency.

HPX V1.1 Released

The newest version of HPX (V1.1) is now available for download! Please see here for the release notes.

HPX exposes an API fully conforming to the concurrency related parts of the C++11/C++14/C++17 standards, extended and applied to distributed and heterogeneous computing, and aligned with the ongoing standardization discussions.

    HPX is a general purpose parallel C++ runtime system for applications of any scale. It implements all of the related facilities as defined by the C++ Standard. As of this writing, HPX provides the only widely available open-source implementation of the new C++17 parallel algorithms. Additionally, HPX implements functionalities proposed as part of the ongoing C++ standardization process, such as large parts of the C++ Concurrency TS, task blocks, data-parallel algorithms, executors, index-based parallel for loops, and many more. It also extends the existing C++ Standard APIs to the distributed case (e.g. compute clusters) and for heterogeneous systems (e.g. GPUs).
    HPX seamlessly enables a new asynchronous C++ Standard Programming Model which tends to improve the parallel efficiency of our applications and helps reduce complexities usually associated with concurrency

CppCast Episode 142: Jacksonville Trip Report with Patrice Roy

By robwirving | Mar 23, 2018 09:07 AM | Tags: None

Episode 142 of CppCast the only podcast for C++ developers by C++ developers. In this episode Rob and Jason are joined by Patrice Roy to discuss the Jacksonville C++ Committee meeting and the state of features that may make it into C++20, new Study Groups and much more.

CppCast Episode 142: Jacksonville Trip Report with Patrice Roy

by Rob Irving and Jason Turner

About the interviewee:

Patrice Roy has been playing with C++, either professionally, for pleasure or (most of the time) both for over 20 years. After a few years doing R&D and working on military flight simulators, he moved on to academics and has been teaching computer science since 1998. Since 2005, he’s been involved more specifically in helping graduate students and professionals from the fields of real-time systems and game programming develop the skills they need to face today’s challenges. The rapid evolution of C++ in recent years has made his job even more enjoyable.

He’s been a participating member in the ISO C++ Standards Committee since late 2014 and has been involved with the ISO Programming Language Vulnerabilities since late 2015. He has five kids, and his wife ensures their house is home to a continuously changing number of cats, dogs and other animals.

Visual Studio 2017 Version 15.7 Preview 2--Christine Ruana

By Marco Arena | Mar 22, 2018 09:29 AM | Tags: visual studio

Today Microsoft released the second preview of the next update: Visual Studio 2017 version 15.7:

Visual Studio 2017 Version 15.7 Preview 2

by Christine Ruana

C++ Standards Conformance Highlights (detailed C++ release notes here):

Implemented Template argument deduction for class templates:

​pair p{2, 2.5};

Full implementation of Expression SFINAE

Expand the using declaration to support pack expansion semantics for variadic base class members

Implemented parallel algorithms conforming to the ISO C++17 standard

Dependency Management For C++ -- Hans Klabbers

By Hans Klabbers | Mar 22, 2018 07:02 AM | Tags: None

Dependency management is a missing piece in the C++ eco system.

Dependency Management For C++

by Hans Klabbers

About the article

The writer took part in the developer survey and followed up on the outcome. Depenendency management is seen as a missing piece in the C++ standard. The article is written as a response on a tweet by Bryce Lelbach and an article on medium by Corentin. It describes the author's ideas for dependency management.