Last week the ISO committee met in Varna to discuss some of the first batch of C++26 features. It’s an excellent occasion to shed some light on the latest status and interesting C++ proposals. Let’s start! By the way: This will be my first blog post with the #cpp26 tag!

A few years ago (see here, I showed an interesting implementation for self-registering classes in factories. It works, but one step might be at the edge of Undefined behavior. Fortunately, with C++20, its new constinit keyword, we can update the code and ensure it’s super safe. Intro   Let’s bring back the topic:

C++ allows us to declare various forms of non-local objects: they usually live throughout the execution of the whole program. In this article, we’ll look at global variables, dynamic, and thread-local objects. We’ll also consider new features for safe initialization C++20. This text comes from my book “C++ Initialization Story”.

Last time I showed a couple of questions about initialization. Try them here if you haven’t already. In this article, I’ll show you the answers and add more notes about initialization in C++. About   I selected the following questions from 25 questions that you can find in my C++ Initialization Story book:

Do you know the answers to those ten questions about Initialization in Modern C++? About   I selected the following questions from 25 questions that you can find in my C++ Initialization Story book: Print version @Amazon C++ Initialization Story @Leanpub Moreover, in the book, you can find a few coding exercises to practice skills.

I’m thrilled to announce the print/paperback edition of “C++ Initialization Story!” After nearly a year of updates and enhancements for the electronic version, this comprehensive resource is now complete! You can purchase the book in a variety of formats, and to celebrate this major update, I’m hosting a giveaway where you can get the book for free :)

Conceptually a Range is a simple concept: it’s just a pair of two iterators - to the beginning and to the end of a sequence (or a sentinel in some cases). Yet, such an abstraction can radically change the way you write algorithms. In this blog post, I’ll show you a key change that you get with C++20 Ranges.

In this article, we’ll look at a super handy ranges view in C++23 - views::zip. In short, it allows you to combine two or more ranges and iterate through them simultaneously. Let’s see how to use it. Basic   If you have two (or more) separate containers and you want to iterate through them “in parallel,” you can write the following code:

C++20 Ranges algorithms have an excellent feature called “Projection”. In short, it’s a callable applied on each range element before further processing. In this article, I’ll show you a couple more examples of this handy feature. Intro   According to the C++20 Standard: [defns.projection]: projection: transformation that an algorithm applies before inspecting the values of elements

std::format added in C++20 is a powerful helper for various text formatting tasks. In this blog post, we’ll have fun and print some tables with it. You’ll see the “old” C++17 version and compare it against the C++20 style. std::format excercise   As an exercise to learn about std::format, we can try printing some more advanced structures than just “Hello World”.

In this article, you’ll learn why std::initializer_list has a bad reputation in C++. Is passing values using is as efficient as “emplace”, how can we use non-copyable types? You’ll also see how to fix some of the problems. Let’s start with the issues first: 1. Referencing local array   If you recall from the previous article, std::initializer_list expands to some unnamed local array of const objects.

In C++11, we got a handy way to initialize various containers. Rather than using push_back() or insert() several times, you can leverage a single constructor by taking an initializer list. For example, with a vector of strings, you can write: std::vector<std::string> vec { "abc", "xyz", "***" }; We can also write expressions like: