Outcome enters sustaining phase, goes ABI stable

by Niall Douglas

After three years of maturing, I am pleased to announce that the Spring release of Outcome, an alternative error handling framework, will enter its sustaining phase and thus it will be able to formally guarantee ABI stability going forth. ABI stability is tested per commit by CI and the specifics of the guarantees is documented here...

The Interesting Evolution of std::equal_range

by Jonathan Boccara

The good old std::equal_range STL algorithm, which has been in the STL since C++98, has evolved along with the versions of C++.

Starting from a poor interface and now a much better one, its story is an interesting example of how to improve the abstraction of an interface...

2021 C++ Standardization Highlights

by Botond Ballo

The ISO C++ Standards Committee (also known as WG21) has not met in person since its February 2020 meeting in Prague, which I wrote about here.

However, the committee and its subgroups have continued their work through remote collaboration, and a number of notable proposals have been adopted into C++23, the next language version, in this way, with many others in the pipeline.

In this post, I will outline some of the highlights of the committee’s work in 2021. (The post will also cover some material from the latter part of 2020, a period when remote collaboration was already underway but which I have not covered in any previous post.) I’ve been less involved in the committee than before, so this post will not be as comprehensive as my previous trip reports, but I hope to share the proposals I’ve found most notable...

What's new in PVS-Studio in 2021?

by Maxim Stefanov, Oleg Lisiy, Sergey Vasiliev

PVS-Studio has plugins for various JetBrains IDEs: Rider, IntelliJ IDEA. Somehow we missed another popular IDE — CLion. Our clients expressed an increasing interest in this feature. Moreover, the PVS-Studio plugin for CLion as a cross-platform IDE would make it possible to work comfortably with the C++ analyzer regardless of the environment in which the developer works: on Windows, Linux or macOS.

C++ on Sea 2022

by Phil Nash

Yes, C++ on Sea is back by the sea! Or at least that is the current plan. We have booked the Leas Cliff Hall, once again, for July 4th-7th 2022. We're now busy, behind the scenes, working out all the details. We'll have updates first thing in the new year when we'll also open the call for speakers.

Little C++ Standard Library Utility: std::align

by Lesley Lai

Recently, I learned about std::align, which is one of the lesser-known functions in the C++ standard library because of its limited use cases. Since it is hard to describe without a specific use case, I will use a simple implementation of an arena allocator as a motivational example.

Top 10 bugs found in C++ projects in 2021

by Vladislav Stolyarov

Let's talk about... HTML! PVS-Studio provides diagnostics that don't just check code – they also look for abnormalities in string literals. The code above triggered one of these diagnostics. Such cases are quite rare. That's why, this one is so intriguing. Someone intended to create one list but added two tags that open this list instead of one. This is clearly a typo. The first tag must open the list, and the second one must close it.

C++20 Concepts: Part 5 (Advanced use cases)

by Gajendra Gulgulia

In this article, I’ll explain and demonstrate how to define concepts that constrain multiple template parameters and more importantly how to use them in a generic function. As promised in the part 3 of the series, I’ll explain this using a function comparing for equality of two different types T and U

The Type-Traits Library: Correctness

by Rainer Grimm

The two main goals of the type-traits library are very convincing: correctness and optimization. Today, I write about correctness...

The Evolutions of Lambdas in C++14, C++17 and C++20

by Jonathan Boccara

Lambdas are one of the most popular features of Modern C++. Since their introduction in C++11, they’ve become ubiquitous in C++ code.

But since their appearance in C++11, they have evolved and gained significant features. Some of those features help write more expressive code, and since using lambdas is so common now, it is worth it to spend time learning what we can do with them.

Our goal here is to cover the major evolutions of lambdas, but not all the little details. A comprehensive coverage of lambdas would be more suited for a book than an article. If you want to dig more, I recommend Bartek’s book C++ Lambda Story, that will tell you everything.

The general evolution of lambdas is to give them able the capabilities of function objects manually defined.

This articles assumes you know the basics of lambdas in C++11. Let’s take it from C++14...