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August 2020

ReSharper C++ 2020.2: Unreal Engine Project Model, Improved C++/CLI Support, and More

By Anastasia Kazakova | Aug 13, 2020 11:03 AM | Tags: None

ReSharper C++ 2020.2 is released!

ReSharper C++ 2020.2: Unreal Engine Project Model, Improved C++/CLI Support, and More

by Elvira Mustafina

From the article:

  • Unreal Engine: support for the Unreal Engine project model, better conformance to the Unreal Engine coding standard, and new inspections.
  • C++/CLI: improved interoperability between C++/CLI and C#, extended navigation and search features, and inspections for C++/CLI-specific keywords.
  • Code analysis: preview for Clang-Tidy fixes, improved support for constexpr functions, and highlighting for misspelled preprocessor directives.
  • Code completion: auto-generated lambda argument for std::function, and import completion can now add forward class declarations.
  • Navigation and search: Go to declaration for unresolved identifiers, hidden preprocessor directives in File Structure, and faster Find Usages.
  • Code style and formatting: new settings for multiline ternary, single-line style comments, and sorting of include directives.
  • File templates: new Source file and Header file templates.

CppCon 2019: Mesh: Automatically Compacting Your C++ Application's Memory--Emery Berger

By Adrien Hamelin | Aug 12, 2020 11:12 AM | Tags: community

This year, CppCon 2020 is going virtual. The dates are still the same – September 14-18 – and we are aiming for the CppCon live event to have pretty much everything you’re familiar with at CppCon except moved online: multiple tracks including “back to basics” and a new “embedded” track; live speaker Q&A; live talk time zones friendly to Americas and EMEA (and we’re going to try to arrange around-the-clock recorded repeats in all time zones, where speakers who are available can be available for live Q&A in their repeated talks too, and we’ll do that if it’s possible – but we’re still working on it!); virtual tables where you can interact face-to-face online with other attendees just like at the physical event; virtual exhibitor spaces where you can meet the folks on your favorite product’s teams to ask them question face-to-face; pre- and post-conference classes; and even the CppCon house band playing live before every plenary session. All talk recordings will be freely available as usual on YouTube a month or two after the event, but everything else above will be available only live during CppCon week.

To whet your appetite for this year’s conference, here’s another of the top-rated talks from last year. Enjoy – and register today for CppCon 2020 – all the spirit and flavor of CppCon, this year all virtual and online!

Mesh: Automatically Compacting Your C++ Application's Memory

by Emery Berger

Summary of the talk:

Programs written in C++ can suffer from serious memory fragmentation, leading to low utilization of memory, degraded performance, and application failure due to memory exhaustion. This talk introduces Mesh, a plug-in replacement for malloc that, for the first time, eliminates fragmentation in unmodified C++ applications through compaction. A key challenge is that, unlike in garbage-collected environments, the addresses of allocated objects in C++ are directly exposed to programmers, and applications may do things like stash addresses in integers, and store flags in the low bits of aligned addresses. This hostile environment makes it impossible to safely relocate objects, as the runtime cannot precisely locate and update pointers. Mesh combines novel randomized algorithms with widely-supported virtual memory operations to provably reduce fragmentation, breaking long-established worst-case bounds on memory efficiency with high probability. Mesh generally matches the runtime performance of state-of-the art memory allocators while reducing memory consumption and eliminating pathological cases; in particular, Mesh reduces the memory of consumption of Firefox by 16% and Redis by 39%. There are efforts underway to incorporate Mesh's approach to eliminate fragmentation into existing allocators like tcmalloc and jemalloc; Mesh itself is available at https://github.com/plasma-umass/Mesh, and it can be used just by setting an environment variable.

C++ Lambda Week: Going Generic--Bartlomiej Filipek

By Adrien Hamelin | Aug 11, 2020 12:49 PM | Tags: c++20

The series continue.

C++ Lambda Week: Going Generic

by Bartlomiej Filipek

From the article:

We’re in the third day of the lambda week. So far, you’ve learned basic syntax and how to capture things. Another important aspect is that lambdas can also be used in the “generic” scenarios. This is especially possible since C++14 where we got generic lambdas (auto arguments), and then in C++20, you can even specify a template lambda!

The C++ Standard Library: The Third Edition includes C++20--Rainer Grimm

By Adrien Hamelin | Aug 11, 2020 12:46 PM | Tags: std

Interested?

The C++ Standard Library: The Third Edition includes C++20

by Rainer Grimm

From the article:

I proudly present the third edition of my book: "The C++ Standard Library". The book includes C++20.

With the current C++20 standard, C++ has many libraries to offer. My book's key idea is to give you the necessary information to all the C++ standard libraries in a concise way.

Introducing ACCU Online - A Local Group With a Global Reach--Bob Schmidt

By Adrien Hamelin | Aug 11, 2020 12:44 PM | Tags: community

Will you attend?

Introducing ACCU Online - A Local Group With a Global Reach

by Bob Schmidt

From the article:

ACCU London is proud to host an ACCU Online event - a rescheduling of Chris Oldwood's previously cancelled "A Test of Strength" talk.

The event will be hosted virtually, on Remo. This will also give us the social and networking aspect of meet-ups that we miss from the in-person version.

When: Wednesday, 12th August 2020, 19:00 start...

CppCon 2019: C++20: The small things--Timur Doumler

By Adrien Hamelin | Aug 10, 2020 11:58 AM | Tags: community c++20

This year, CppCon 2020 is going virtual. The dates are still the same – September 14-18 – and we are aiming for the CppCon live event to have pretty much everything you’re familiar with at CppCon except moved online: multiple tracks including “back to basics” and a new “embedded” track; live speaker Q&A; live talk time zones friendly to Americas and EMEA (and we’re going to try to arrange around-the-clock recorded repeats in all time zones, where speakers who are available can be available for live Q&A in their repeated talks too, and we’ll do that if it’s possible – but we’re still working on it!); virtual tables where you can interact face-to-face online with other attendees just like at the physical event; virtual exhibitor spaces where you can meet the folks on your favorite product’s teams to ask them question face-to-face; pre- and post-conference classes; and even the CppCon house band playing live before every plenary session. All talk recordings will be freely available as usual on YouTube a month or two after the event, but everything else above will be available only live during CppCon week.

To whet your appetite for this year’s conference, here’s another of the top-rated talks from last year. Enjoy – and register today for CppCon 2020 – all the spirit and flavor of CppCon, this year all virtual and online!

C++20: The small things

by Timur Doumler

Summary of the talk:

C++20 comes with some big new language features: modules, coroutines, concepts, spaceship, and many new libraries. But apart from all those, C++20 also offers many small language improvements, making C++ more powerful and expressive, but also safer and more consistent.

This talk is an overview over all those smaller additions to the core language that will make your life easier. We will discuss much-needed improvements to existing facilities such as lambdas, CTAD, structured bindings, and initialisation, as well as brand-new language utilities that you may not yet have heard about!

CppCon 2019: A Unifying Abstraction for Async in C++--Eric Niebler, David Hollman

By Adrien Hamelin | Aug 7, 2020 12:44 PM | Tags: community

This year, CppCon 2020 is going virtual. The dates are still the same – September 14-18 – and we are aiming for the CppCon live event to have pretty much everything you’re familiar with at CppCon except moved online: multiple tracks including “back to basics” and a new “embedded” track; live speaker Q&A; live talk time zones friendly to Americas and EMEA (and we’re going to try to arrange around-the-clock recorded repeats in all time zones, where speakers who are available can be available for live Q&A in their repeated talks too, and we’ll do that if it’s possible – but we’re still working on it!); virtual tables where you can interact face-to-face online with other attendees just like at the physical event; virtual exhibitor spaces where you can meet the folks on your favorite product’s teams to ask them question face-to-face; pre- and post-conference classes; and even the CppCon house band playing live before every plenary session. All talk recordings will be freely available as usual on YouTube a month or two after the event, but everything else above will be available only live during CppCon week.

To whet your appetite for this year’s conference, here’s another of the top-rated talks from last year. Enjoy – and register today for CppCon 2020 – all the spirit and flavor of CppCon, this year all virtual and online!

A Unifying Abstraction for Async in C++

by Eric Niebler, David Hollman

Summary of the talk:

Async in C++ is in a sad state. The standard tools -- promises, futures, threads, locks, and std::async -- are either inefficient, broken, or both. Even worse, there is no standard way to say _where_ work should happen. Parallel algorithms, heterogeneous computing, networking & IO, reactive streams, and more: all critically important foundational technologies that await a standard abstraction for asynchronous computation.

In this talk, Eric Niebler and David Hollman dig into the Standard Committee's search for the basis operations that underpin all asynchronous computation: the long-sought Executor concept. The latest iteration of Executors is based on the Sender/Receiver programming model, which provides a generalization of many existing paradigms in asynchronous programming, including future/promise, message passing, continuation passing, channels, and the observer pattern from reactive programming. It also has surprising and deep connections to coroutines, which further demonstrates the model’s potential to be a truly unifying abstraction for asynchronous programming in C++20 and beyond.

Eric and David will present the short-term and long-term directions for Executors in ISO Standard C++, illustrating the design by walking through several implementation examples. They will talk about the direct connection between coroutines and the Sender/Receiver model and discuss what it means for the future of asynchronous APIs in C++. Finally, they will cover how the restrictions imposed by the Executors model should affect the way you write code today so your code is ready for the next big revolution in parallel and concurrent C++ programming.