Tag Archive for: constexpr

Posts

constexpr

constexpr and consteval Functions in C++20

February 4, 2022

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With C++20, constexpr became way more powerful. Additionally, we have consteval functions in C++20…

constexpr

constexpr Functions

January 26, 2022

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Today, I continue my story about programming at compile time. After template metaprogramming, the type-traits…

TimelineCpp20CoreLanguage

constexpr std::vector and std::string in C++20

September 16, 2020

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Probably the most viral keyword in modern C++ is constexpr. With C++20, we have a constexpr std::vector…

TimelineCpp20CoreLanguage

volatile and Other Small Improvements in C++20

August 17, 2020

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Today, I complete my tour through the C++20 core language features with a few small improvements. One…

TimelineCpp20Core

C++ 20: The Core Language

October 27, 2019

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My last post C++20: The Big Four started with an overview of concepts, ranges, coroutines, and modules.…

constexpr

C++ Core Guidelines: Programming at Compile Time with constexpr

February 1, 2019

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My mini-series about programming at compile time started with template metaprogramming, continued with…

CharakteristikeImmutableDataEng

Immutable Data

January 28, 2017

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A key to purely functional languages is that their data are immutable. Therefore, assignments such as…

constexpr11

constexpr Functions

November 15, 2016

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constexpr functions are functions that can be executed at compile time. Sounds not so thrilling. But…

userdefinedTypes

constexpr – Variables and Objects

November 13, 2016

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If you declare a variable as constexpr the compiler will evaluate them at compile time. This holds not…

userdefinedLiteralsConstexprResult

Constant Expressions with constexpr

November 11, 2016

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You can define with the keyword constexpr an expression that can be evaluated at compile time. constexpr…

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 […]