Archive for category: Blog

TemplateSpecialization

Full Specialization of Function Templates

July 9, 2021

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As you may know from my previous post, Template Specialization, a function template can only be full…

TemplateSpecialization

Template Specialization – More Details About Class Templates

June 29, 2021

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After I presented in my last post Template Specialization, the basics about template specialization,…

TemplateSpecialization

Template Specialization

June 24, 2021

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Templates define the behavior of families of classes or functions. Often it is required that particular…

templatesArguments

Template Argument Deduction of Class Templates

June 17, 2021

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In my last post, Template Arguments, I wrote about function template type deduction (C++98) and auto…

RainerGrimmSmall

The New pdf Bundle is Ready: C++20 Coroutines

June 10, 2021

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I have prepared the pdf bundle. To get it is quite simple. If you subscribe to the newsletter, you…

templatesArguments

Template Arguments

June 7, 2021

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It is pretty interesting how the compiler deduces the types for the template arguments. To make it short,…

templatesParameters

Alias Templates and Template Parameters

June 4, 2021

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Today, I write about two topics: alias templates and template parameters. Alias templates are a way to…

ConcurrencyCoverFrame

“Concurrency with Modern C++” Update to C++20

June 3, 2021

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I am happy to announce. I updated my "Concurrency with Modern C++" book to C++20. This update includes…

ClassTemplate

Surprise Included: Inheritance and Member Functions of Class Templates

May 27, 2021

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In my last post, "Class Templates", I presented the basics. Today, I may surprise you with the inheritance…

ClassTemplate

Class Templates

May 19, 2021

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A function template represents a family of functions. Accordingly, a class template represents a family…

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, […]