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Meeting C++ 2022 is in 3 weeks!

By Meeting C++ | Oct 27, 2022 07:57 AM | Tags: meetingcpp community

This years Meeting C++ conference is only 3 weeks away! Not much time left to join this years conference in Berlin or online for watching the talks and being part of the discussions around C++ and software design!

Meeting C++ features this year keynotes by Nicolai Josuttis, Daniela Engert and Klaus Iglberger! Online the conference offers AMAs with Andrei Alexandrescu, Inbal Levi and Bjarne Stroustrup. Onsite 3 tracks are hosted, with a 4th track being online only.

Meeting C++ 2022

by Jens Weller

From the page:

Meeting C++ 2022 will be held as a hybrid event in Berlin and online on 17th - 19th November 2022.

This years conference will be hybrid, a limited number of attendees will be able to join in Berlin, but the conference will also feature online and onsite only content. You'll be able to meet and exchange with the world wide C++ community for 3 full days.

Examples of errors that PVS-Studio found in LLVM 15.0

By Andrey Karpov | Oct 25, 2022 09:14 AM | Tags: pvs-studio llvm 15 llvm

Compilers are evolving: they issue more and more warnings. Do developers still need to use static code analyzers like PVS-Studio? Yes, because analyzers are evolving too. In this article you'll see how PVS-Studio can find bugs even in a compiler.

Examples of errors that PVS-Studio found in LLVM 15.0

by Andrey Karpov

From the article:

It's a cool bug, although it's not scary. There is no semicolon after the return statement. As a result, the code does not work as it looks.

void FunctionLoweringInfo::ComputePHILiveOutRegInfo(const PHINode *PN) {
  ....
  Register DestReg = It->second;
  if (DestReg == 0)
    return
  assert(Register::isVirtualRegister(DestReg) &&
         "Expected a virtual reg");
  LiveOutRegInfo.grow(DestReg);
  ....
}

Improving copy and move elision - Bran Hagger

By Blog Staff | Oct 24, 2022 12:51 PM | Tags: None

improving-copy-and-move-elision.pngFrom the MSVC team blog:

Improving copy and move elision

by Bran Hagger

From the article:

With Visual Studio 2022 version 17.4 Preview 3, we’ve significantly increased the number of situations where we do copy or move elision and given users more control over whether these transformations are enabled. ...

PVS-Studio 7.21: GitLab Code Quality, Unreal Engine

By Andrey Karpov | Oct 19, 2022 06:49 AM | Tags: unreal engine pvs-studio gitlab

PVS-Studio 7.21 has been released. This short note describes the analyzer's main enhancements and lists our recent articles and quizzes.

PVS-Studio 7.21: GitLab Code Quality, Unreal Engine

by Sergey Vasiliev

From the article:

New C++ diagnostics:

  • V1090. The 'std::uncaught_exception' function is deprecated since C++17 and is removed in C++20. Consider replacing this function with 'std::uncaught_exceptions'.
  • V1091. The pointer is cast to an integer type of a larger size. Casting pointer to a type of a larger size is an implementation-defined behavior.
  • V1092. Recursive function call during the static/thread_local variable initialization might occur. This may lead to undefined behavior.

ACCU 2023 Call for Papers is open -- ACCU

By Felix Petriconi | Oct 18, 2022 10:33 AM | Tags: community

The ACCU is now putting together its program, and they want you to speak on C++. The ACCU conference has strong C++ tracks, though it is not a C++-only conference. If you have something to share, check out their

Call for PapersACCU 2023 Logo

by the ACCU

About the conference:

The ACCU 2023 conference will be from 2023-04-19 to 2023-04-22, with pre-conference workshops on 2023-04-17 and 2023-04-18.

The ACCU 2023 will be a hybrit event.

Historically, ACCU has a lot of C++ and C content, and is proud of that: ACCU is the foremost annual conference for people interested in C++ and C, at least in and around the UK. But it is not just a C++ and C conference, ACCU is about programming in whatever language people are using, with whatever tools and processes people are using: D, Chapel, Java, Kotlin, C#, F#, Groovy, Rust, Go, Python, Ruby, Lisp, to name just a few programming languages about which there have been sessions at ACCU conferences. Git, Mercurial, CMake, Meson, TDD, BDD, all these tools and techniques have been the focus of sessions at ACCU. The ACCU Conference is looking for sessions that will be interesting to people who create software.
The ACCU Conference is put on by ACCU (https://accu.org), but is open to anyone who wishes to be there either as a presenter or an attender.

The Call for Papers lasts for about 3 weeks and will close on Monday 7th November 2022 at 23:59:59 GMT.

The Bridge Pattern -- Rainer Grimm

By Blog Staff | Oct 18, 2022 10:28 AM | Tags: None

Of Bridges and Pimpls:

The Bridge Pattern

by Rainer Grimm

From the article:

In C++, a simplified version of the Bridge Pattern is often used. ... The key idea of the Pimpl Idiom is that the implementation of the class is hidden behind a pointer. Here is a recipe for implementing the Pimpl Idiom: ...

 

CppCon 2022 keynote: How C++23 changes the way we write code -- Timur Doumler

By Blog Staff | Oct 10, 2022 03:48 PM | Tags: None

Hot off the press from CppCon:

CppCon 2022 keynote: How C++23 changes the way we write code

Timur Doumler

From the announcement:

Timur Doumler on C++23 at his CppCon 2022 keynote in Aurora, Colorado!

This video is in “prerelease” and cannot be found directly on our YouTube channel, instead we are providing a direct link here only! Feel free to share this with colleagues and friends and impress them with your insider access...

The power of ref-qualifiers -- Andreas Fertig

By Blog Staff | Oct 6, 2022 09:35 AM | Tags: None

overload171cover.pngNew in this month's Overload magazine:

The power of ref-qualifiers

by Andreas Fertig

From the article:

... What I have illustrated is that there is an issue with range-based for-loops. In (1), we call GetKeeper().items() in the head of the range-based for-loop. By doing this, we create a dangling reference.

ref-qualifiers to the rescue

Now, this brings us to ref-qualifiers. They are often associated with move semantics, but we can use them without move. However, we will soon see why ref-qualifiers make the most sense with move semantics.

A version of Keeper with ref-qualifiers looks like Listing 2...

The gotcha of the C++ temporaries that don’t destruct as eagerly as you thought -- Raymond Chen

By Blog Staff | Oct 5, 2022 01:57 PM | Tags: None

RaymondChen_5in-150x150.jpgWorth waiting for:

The gotcha of the C++ temporaries that don’t destruct as eagerly as you thought

by Raymond Chen

From the article:

Forgetting to take a lock when updating variables is a common mistake. One way to make the mistake harder to make is to force the access to occur through some mechanism that proves that you possess the lock. Maybe something like this: ...