Archive for category: Functional

CharakteristikeImmutableDataEng

Immutable Data

January 28, 2017

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A key to purely functional languages is that their data are immutable. Therefore, assignments such as…

Higher-Order Functions

January 26, 2017

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Higher-order functions are the pendant to First-Class Functions because higher-order functions can take…

CharakteristikenFunktionaleProgrammierungFirstClassFunctionsEng

First-Class Functions

January 24, 2017

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One of the characteristics of functional programming is first-class functions. First-class functions…

CharakteristikenFunktionaleProgrammierungEng

The Definition of Functional Programming

January 23, 2017

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The definition of functional programming is relatively easy. Functional programming is programming with…

timeline.FunktionalInCpp17Cpp20Eng

Functional in C++17 and C++20

January 21, 2017

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Which functional feature can we expect with C++17, and for which functional feature can we hope with…

timeline.FunktionalInCpp11Cpp14Eng

Functional in C++11 and C++14: Dispatch Table and Generic Lambdas

January 19, 2017

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My favorite example, the dispatch table, shows how nicely the features in modern C++ work together. A…

FunktionalTR1Cpp11Eng

Functional in TR1 and C++11

January 17, 2017

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This post continues our journey through the functional features of classical, modern, and future C++.…

timeline.FunktionalEng

Functional in C++98

January 15, 2017

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C++ is not a functional programming language, but you can program in a functional style. What are the…

ObjectOrientedGenericFunctional

Object-Oriented, Generic, and Functional Programming

January 12, 2017

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C++ is not a functional programming language. C++ has its roots in procedural and object-oriented programming.…

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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, […]