The New Ranges Library

A small-time jump and we are in the year 2020. C++ will get - as far as the future is predictable - the new ranges library. Thanks to Eric Nieblers library, working with the Standard Template Library (STL) will become much more comfortable and powerful.


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Tags: C++20
Views: 31294

Fold Expressions

With fold expressions, you can implement Haskell known functions foldl, foldr, foldl1 and foldr1 directly in C++. These four functions successively reduce a list to a single value.

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Tags: C++17
Views: 59629

Recursion, List Manipulation, and Lazy Evaluation

The remaining three characteristics of functional programming are told quite quickly: Recursion, manipulation of lists and lazy evaluation.

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Views: 29523

Pure Functions

Pure functions are quite similar to mathematical functions. They are the reason that Haskell is called a pure functional programming language.

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Views: 24364

Immutable Data

A key to purely functional languages is that their data are immutable. Therefore, assignments such as x= x+1 or ++x are not possible in the purely functional language Haskell. The consequence is that Haskell supports no loops like for, while, or until. They are based on the modification of a loop variable. Haskell does not modify existing data; Haskell creates new data when needed and reuses the old ones.

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Tags: constexpr
Views: 20370

Higher-Order Functions

Higher-order functions are the pendant to First-Class Functions because higher-order functions can take functions as an argument or return them as a result.

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Views: 61318

First-Class Functions

One of the characteristics of functional programming is first-class functions. First-class functions behave like data and are heavily used in the Standard Template Library.

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Views: 29889

The Definition of Functional Programming

The definition of functional programming is quite easy. Functional programming is programming with mathematical functions. Is that all? Of course, not!

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Views: 54735

Functional in C++17 and C++20

Which functional feature can we expect with C++17, for which functional feature can we hope for with C++20? This is exactly the question I will concisely answer in this post.

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Tags: C++20, C++17
Views: 77893

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

My favourite example the dispatch table shows how nice the features in modern C++ work together. A dispatch table is a table of pointers to functions. In my case, it is a table of handles to polymorphic function wrappers.

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Tags: lambdas
Views: 64874

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