Last year, I wrote a blog post about new C++23 range adaptors for joining and zipping. The C++23 standard includes a longer lists of range adapters (you can find a list here). Among them, there are several adaptors used for creating views consisting of chunks or “windows” of the elements of a given range. In this blog post, I will present these adaptors.
The C++23 standard break-down
It’s almost the eve of 2023 and the C++23 standard is feature complete for some while. At some point next year, the new standard version will be formally approved and we will officially have a new version of the standard. But compilers and library implementors are already supporting some of the new additions (or updates) to the standard. If you haven’t been following closely the evolution of C++23 you are probably wondering what’s in this new version.
In this article, you will find a list of the most significant changes to the standard. There is actually quite a long list of proposals that have been accepted . Yet, some of these are things that you won’t use that often; on the other hand, many are defect reports, meaning they are fixing an issue introduced in a previous version of the standard.
A study of several issues found with static analysis
The static analysis of our code base has identified lately several several issues in the C++ code that I had to fix. Once again, this help me I realize how it is to make mistakes that are usually hard to find by just looking at the code (with a human eye). I believe it is … Read more
Three new utility functions in C++23
Some time ago I wrote a blog post called Three C++23 features for common use. In this article, I want to continue on that idea and discuss three new utility functions that were added to C++23.
Using the C++23 std::expected type
The C++23 standard will feature a new utility type called std::expected. This type either contains an expected value, or an unexpected one, typically providing information about the reason something failed (and the expected value could not be returned). This feature is, at this time, supported in GCC 12 and MSVC 19.33 (Visual Studio 2022 17.3). In this article, we’ll see what std::expected is and how it can be used.
requires expressions and requires clauses in C++20
The C++20 standard added constraints and concepts to the language. This addition introduced two new keywords into the language, concept and requires. The former is used to declare a concept, while the latter is used to introduce a requires expression or a requires clause. These two could be confusion at first, so let’s take a look at which is which and what is their purpose.
Unwrapping WinUI3 for C++
The Windows UI Library 3, known shortly as WinUI 3, is a native UI framework that ships with the Windows App SDK. This is an SDK complementary to the Windows SDK, WPF, WinForms, and Win32. It provides a new unified set of APIs and tools that can be used to develop desktop apps on Windows 11 (as well as downwards to Windows 10, version 1809). I decided to have a look at what this framework provides and this post is written as I am trying it. To evaluate it, I’ll try to build a small application that does conversion between Celsius and Fahrenheit degrees as you type in a field.
New C++23 range adaptors
The C++23 standard provides several new range adaptors in the ranges library. These include join_with, zip, and zip_transform. In this post, I will briefly show how these should work.
What has the standard committee ever done for us?
Disclaimer
Should go without saying but… this post is a pamphlet. It’s only intended to make you smile.
Every time I see people complaining on social media about the C++ standard committee not doing this or that I remember the famous scene from the movie Live of Brian when the Jews debate the benefits of the Roman occupation. However, put into the C++ world, the scene would be as follows: