About code. Mostly on C++
This article continues the series of discussing the C++26 features with the topic of concepts, which are language level asserts for checking function preconditions, postconditions, and invariants.
In a previous blog post, I talked about several features included in C++26: specifying a reason to delete a function, placeholder variables with no name, structured binding declaration as a condition, and user-generated static_assert messages. In this post, I will continue exploring the new features that have been already included in the C++26 standard. #embed…
The C++26 version of the C++ standard is a work in progress, but a series of language and library features have been already added. Furthermore, some of them are already supported by Clang and GCC. One of these new changes was discussed in my previous article, Erroneous behaviour has entered the chat. In this post,…
The C++ language defines the observable behaviour of a program and uses terms such as ill-formed or undefined behaviour to describe it. The C++26 standard introduces a new one, called erroneous behaviour. In this post, we’ll look at what these terms mean. Well-formed This is the simplest of them all. It means that a program…
The Third Edition of my book, Modern C++ Programming Cookbook (ISBN 978-1835080542) has been published by Packt. The book can be ordered from Amazon and Packt. The book is organized in recipes, much like a cookbook. These recipes, in turn, are organized in sections that introduce you to the topic, list any necessary pre-requisites and…
When it comes to format a piece of text in C++ there are several ways you can employ: I/O streams, particularly std::stringstream with stream operations (such as operator <<) printf family of functions, particularly sprintf the C++20 format library, particularly std::format / std::format_to any 3rd party library, {fmt} in particular (the source of the new…
Enumerations are widely used and we often need to convert enum values to strings (typically for recording values in logs) but there is no option at the language level or a utility in the standard library to make it possible. Therefore, developers are usually handcrafting their own solutions. Let’s say we have the following enum:…
Recently, I stumbled across a peculiar error that I found nothing about on the web. Although I got rid of it, I didn’t figure out what the problem was. This post is merely the story of what happened. I am working on a project that contains both C++ and C# projects. The C++ ones used…
The C++23 standard includes several new functions to the std::optional class: and_then, transform, or_else. These are monadic operations and are intended to simplify the chaining of several operations that may or may not produce a value. In this post, I want to briefly present these functions and to make some observations on them. A starting…
The WebView2 control supports different printing scenarios. In this new article, I’ll show you how to display a print dialog and, respectively, how to print to PDF.