Archive for category: Patterns

AntiPatterns

Anti-Patterns

August 29, 2022

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An anti-pattern is a proven way to shoot yourself into your foot. The term anti-pattern was coined by…

patternRelationsAlgorithmsFrameworks

About Algorithms, Frameworks, and Pattern Relations

August 22, 2022

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Patterns don't live in isolation, they are in relation to each other. A relation can mean they are in…

patternsStructure

The Structure of Patterns

August 15, 2022

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The classics "Design Patterns: Elements of Reusable Object-Oriented Software", and "Pattern-Oriented…

classification

Classification of Patterns

August 8, 2022

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In my last post, I presented the classification of design patterns based on the seminal book "Design…

classification

Classification of Design Patterns

July 28, 2022

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Patterns can be classified in various ways. The most prominent ones are the ones used in the books "Design…

history

The History of Patterns

July 5, 2022

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Most software developers assume that the book "Design Patterns: Elements of Reusable Object-Oriented…

patterns

The Advantages of Patterns

June 30, 2022

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Before I write about patterns in my upcoming posts, I have to answer one question first. What are the…

patterns

Design Patterns and Architectural Patterns with C++: A First Overview

June 20, 2022

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Based on my last poll, "Which mentoring program should I implement next?" I recognized that there is…

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, […]