Archive for category: C++20

C++20: Module Support of the Big Three

October 16, 2023

I have written almost 100 posts about C++20 in the last four years, but I'm not done. This post continues…

Improved Iterators with Ranges

June 9, 2022

/

There are more reasons to prefer ranges library above the classical Standard Template Library. The ranges…

Sentinels and Concepts with Ranges Algorithms

May 31, 2022

/

The ranges library in C++20 supports sentinels. Sentinels stand for the end of a range and can be regarded…

Projections with Ranges

May 25, 2022

/

The algorithms of the ranges library are lazy, can work directly on the container, and can easily be…

The Ranges Library in C++20: More Details

May 19, 2022

/

Working with the Standard Template Library (STL) is much more comfortable and powerful thanks to the…

TimelineCpp20Concepts

Check Types with Concepts

May 12, 2022

/

Concepts are a powerful and elegant tool to check at compile time if a type fulfills. Thanks to static_assert,…

TimelineCpp20Concepts

Check Types with Concepts – The Motivation

May 5, 2022

/

static_assert allows you to check at compile time if a type T fulfills the Concept: static_assert(Concept<T>). Before…

TimelineCpp20Concepts

Using Requires Expression in C++20 as a Standalone Feature

April 27, 2022

/

In my last post "Defining Concepts with Requires Expressions", I exemplified how you can use requires…

TimelineCpp20Concepts

Defining Concepts with Requires Expressions

April 20, 2022

/

In my last post, "Define Concepts", I defined the concepts Integral, SignedIntegral, and UnsigendIntegral…

TimelineCpp20Concepts

Define Concepts

April 12, 2022

/

There are two ways to define a concept: You can combine existing concepts and compile-time predicates,…

Latest news

std::execution: SenderDecember 16, 2024 - 11:25 am
std::execution offers three types of senders: factories, adapters, and consumers. I’ll take a closer look at these today. Most of the following content is from proposal P2300R10. I will try to represent it more concisely. Sender Factory A sender factory is an algorithm that takes no senders as parameters and returns a sender. execution::schedule execution::sender […]
std::execution: Composition of SendersDecember 9, 2024 - 10:25 am
Most sender adaptors are composable using the pipe operator. Let me start with a simple example of composition with the pipe operator. Instead of the nested function calls call1(call2(input)) you can write call1 | call2(input) or even: input | call1 | call2 Function composition Okay, this example was straightforward. Let’s do something more complicated. Proposal […]
std::execution: Inclusive ScanDecember 2, 2024 - 10:30 am
Inclusive scan solves problems related to range queries, such as calculating the sum of a range of elements in an array. It is also used in range minimum queries and various other algorithms. Before I present the asynchronous inclusive scan, I introduce the inclusive scan, aka prefix sum. Prefix Sum In computer science, the prefix […]
std::execution: Asynchronous AlgorithmsNovember 25, 2024 - 9:06 am
std::execution supports many asynchronous algorithms for various workflows. Presenting proposal P2300R10 is not easy. First, it is very powerful, and second, it is very long. Therefore, I concentrate on specific aspects of the proposal. What are the priorities of this proposal? Priorities The terms execution resource, execution agent, and scheduler are essential for the understanding […]
std::executionNovember 18, 2024 - 9:03 am
std::execution, previously known as executors or Senders/Receivers, provides “a Standard C++ framework for managing asynchronous execution on generic execution resources“. (P2300R10) Side Note Change of plans. My original plan was to present the C++26 library after the core language. However, the implementation status of the library is not good enough. Therefore, I decided to continue […]
C++26 Core Language: Small ImprovementsNovember 4, 2024 - 8:34 am
There are more small improvements in the C++26 language, which you should know. static_assert extension First, here’s the syntax of static_assert in C++11: static_assert(compile time predicate, unevaluated string) With C++26, the string can be a user-defined type having the following properties: static_assert can now be used with a format string. Here’s a nice example from […]