Archive for category: C++ Core Guidelines

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C++ Core Guidelines: Accessing Objects in a Hierarchy

October 27, 2017

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There are nine rules to access objects in class hierarchies. Let's have a closer look. Here…

C++ Core Guidelines: The Remaining Rules about Class Hierarchies

October 20, 2017

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I needed three posts to present the 20 rules for class hierarchies in the C++ core guidelines. Here are…

C++ Core Guidelines: More Rules about Class Hierarchies

October 13, 2017

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In the last post, I started our journey with the rules of class hierarchies in modern C++. The first…

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C++ Core Guidelines: Class Hierarchies

October 5, 2017

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Let's talk in this post about rules for class hierarchies in general and in particular. The C++ core…

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C++ Core Guidelines: Function Objects and Lambdas

September 29, 2017

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I can not think about modern C++ without lambda expressions. So my wrong assumption was that there are…

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C++ Core Guidelines: Comparison, Swap, and Hash

September 22, 2017

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This post will be about comparisons, swap, and hash. That means I conclude with his post my treatise…

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C++ Core Guidelines: Rules for Copy and Move

September 15, 2017

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The rules for copy and move are pretty obvious. But before I describe them I have to write about the…

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C++ Core Guidelines: Constructors

September 8, 2017

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The lifecycle of each object starts with its creation; therefore, this post will be about the thirteen…

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C++ Core Guidelines: Destructor Rules

September 1, 2017

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Does my class need a destructor? I often heard this question. Most of the time the answer is no and you…

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C++ Core Guidelines: The Rule of Zero, Five, or Six

August 25, 2017

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This post is about the rule of zero, five, or maybe six. I will also show the difference between copy…

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, […]