Tag Archive for: Concepts

Posts

TimelineCpp20Concepts

C++20: Define the Concepts Equal and Ordering

January 24, 2020

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In my last post, I defined the concept Equal. Now, I go one step further and use the concept Equal to…

TimelineCpp20Concepts

C++20: Define Concepts

January 17, 2020

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With this post, I start my last fascinating topic to concepts: define your concepts. Consequentially,…

TimelineCpp20Concepts

C++20: Concepts – Predefined Concepts

January 10, 2020

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C++20 has many predefined concepts. Consequentially, before you define your concept, you should know…

TimelineCpp20Concepts

C++20: Concepts – What we don’t get

December 20, 2019

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The Template Introduction from the Concepts TS is a new way to use concepts. This syntactic variant is…

TimelineCpp20Concepts

C++20: Concepts – Syntactic Sugar

December 13, 2019

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Today, my post is not about something new to concepts. It's about syntactic sugar. I write about abbreviated…

TimelineCpp20Concepts

C++20: Concepts, the Placeholder Syntax

December 6, 2019

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Today, I have a simple answer to a challenging question: Where can I use my concept? Concepts can be…

TimelineCpp20Concepts

C++20: Concepts, the Details

November 29, 2019

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In my last post, C++20: Two Extremes and the Rescue with Concepts, I gave the first motivation for concepts.…

TimelineCpp20Concepts

C++20: Two Extremes and the Rescue with Concepts

November 21, 2019

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I finished my overview of C++20 in the last post. Now, it's time to dive into the details. What can be…

TimelineCpp20BigFourUpdate

C++20: The Big Four

October 23, 2019

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This post presents you the big four: concepts, ranges, coroutines, and modules. C++20 has a lot…

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C++ Core Guidelines: Regular and SemiRegular Types

November 22, 2018

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The topic for today is quite important when you create your type: Regular and SemiRegular types. Here…

Latest news

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 […]
Placeholders and Extended Character SetOctober 28, 2024 - 10:19 am
Placeholders are a nice way to highlight variables that are no longer needed. Additionally, the character set of C++26 will be extended. Placeholders Structured bindings are a C++17 feature that allows you to bind multiple variables to the elements of a structured object. The following program demonstrates using tuples and structured bindings to return and […]
Contracts in C++26October 21, 2024 - 9:54 am
Contracts allow you to specify preconditions, postconditions, and invariants for functions. Contracts should already be part of C++20 but were removed in the standard meeting in Cologne. Here is what Herb Sutter said about contracts on Sutter’s Mill: “contracts is the most impactful feature of C++20 so far, and arguably the most impactful feature we […]
Reflection in C++26: Determine the LayoutOctober 14, 2024 - 9:42 am
Thanks to reflection, you can determine the layout of types. My examples are based on the reflection proposal P2996R5. Class Layout The following program determines the class layout of a few members. // classLayout.cpp #include <experimental/meta> #include <iostream> #include <utility> #include <vector> #include <array> struct member_descriptor { std::size_t offset; std::size_t size; bool operator==(member_descriptor const&) const […]
Reflection in C++26: Metafunctions for Enums and ClassesOctober 7, 2024 - 1:53 pm
Today, I continue my journey through reflection in C++26 and play with enums and classes. The names of the metafunctions to access an Enum or a Class member are often identical. Access the Members of an Enum The following program is based on one by Daveed Vandevoorde. Daveed is one of the fathers of reflection, […]