The concept of a polymorphic allocator from C++17 is an enhancement to standard allocators from the Standard Library. It’s much easier to use than a regular allocator and allows containers to have the same type while having a different allocator, or even a possibility to change allocators at runtime. Let’s see how we can use it and hack to see the growth of std::vector containers.

Let’s consider a simple task: “Use a worker thread to compute a value”. In the source it can look like the following line: std::thread t([]() { auto res = perform_long_computation(); }; We have a thread, and it’s ready to start. But how to get the computed value efficiently out of that thread?

In articles about lambda expression (like this one from last week on my page), it’s easy to show examples where the lambda runs on the same thread as the caller. But how about asynchronous cases? What if your lambda is called on a separate thread? What problems you might encounter there.

[](){} The mixture of brackets in the preceding line become one of the most noticeable indications of Modern C++. Yep. Lambda Expressions! It might sound like I’m trying to create a new blog post about something that everyone knows. Is that true? Do you know all the details of this modern C++ technique?

Two weeks ago, I announced a little game on my blog! Today I’d like to present some of the solutions you sent me and discuss a few things from various aspects of Modern C++. Big Thanks!   First of all, I’d like to thank all of the participants for sending the solutions.

Blob storage is an object storage service you use in Azure. It is designed for storing large volumes of unstructured data, including text, binary data, images, and text. In this service, your data is stored in containerized blobs with a directory-like structure. You can use blob storage to ensure flexible access to storage, high availability, and data consistency.

What is SFINAE? Where can you use this metaprogramming technique? Are there any better alternatives in Modern C++? And how about Concepts from C++20? Read on to find out! Note: I’d like to thank KJ for reviewing this article and providing me with valuable feedback from the early stage of the writing process.

Comments in code might not only be some text floating around the functions, variables and classes, but they might contain some extra semantic information. With this improvement, you can navigate through projects much faster or even organize your knowledge. In this blog post, I’ll show you two ways on how to add extra metadata to comments in Visual Studio.

Memory access patterns are one of the key factors for writing efficient code that runs over large data sets. In this blog post, you’ll see why there might be a perf difference of almost 2.5x (in both directions!) when working with a vector of pointers versus a vector of value types.

Today I have one use case for you: how to declare a const collection of unique pointers of polymorphic types? Can we use std::vector? or maybe std::array? What are the options here? What if we’d like to have such collection as a class member? Have a look in the article.

In C++20, we have a new and cool way to do text formatting. It’s more like Python style and combines C-Style printf and with modern C++ type-safety. In this guest post written by the author of the proposal - Victor Zverovich - you’ll learn how to use this new technique!

Continuing the tradition for other ISO C++ Meetings, I prepared a blog post where you’ll learn about: The current status of C++20 an overview about the Prague ISO C++ Meeting (10th till 15th February 2020) a few interesting papers that are worth reading Let’s start! Disclaimer: the view presented here is mine and does not represent the opinion of the ISO C++ Committee.