Tag Archive for: Classes

Posts

Wolpertinger

C++ Core Guidelines: Rules for Unions

November 17, 2017

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A union is a particular data type where all members start at the same address. A union can hold only…

genetic

C++ Core Guidelines: More Rules for Overloading

November 10, 2017

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I started the last post on my journey through the rules for overloading functions and operators. Let…

mistake

C++ Core Guidelines: Rules for Overloading and Overload Operators

November 4, 2017

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There are ten rules for overloading and overload operators in the C++ core guidelines. Many of them are…

doorSmall

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…

Lambda

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…

Latest news

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, […]
Reflection in C++26: MetafunctionsSeptember 30, 2024 - 10:14 am
Reflection offers many metafunctions that run at compile time. The metafunctions are declared as consteval. consteval creates a so-called immediate function. Each invocation of an immediate function creates a compile-time constant. To say it more directly. A consteval (immediate) function is executed at compile-time. Read more about consteval and constinit in my previous post: Two […]