Ranges

Thanks to C++23, constructing containers will become more convenient. Additionally, the ranges library got more new views.

There are more reasons to prefer ranges library above the classical Standard Template Library. The ranges iterators support unified lookup rules and provide additional safety guarantees.

The ranges library in C++20 supports sentinels. Sentinels stand for the end of a range and can be regarded as generalized end iterators.

The algorithms of the ranges library are lazy, can work directly on the container, and can easily be composed. But they have more to offer: projections. A projection is a mapping of a set into a subset. Let me show you in this post what that means:

Working with the Standard Template Library (STL) is much more comfortable and powerful thanks to the ranges library. The algorithms of the ranges library are lazy, can work directly on the container, and can quickly be composed. But there is more to it:

Today, I finish my experiment writing beloved Python functions in C++. So far, I have implemented the Python functions filter, range, and xrange. Today, I have a closer look at the map function and combine the functions map and filter into one function.

In my last post, C++20: Pythonic with the Ranges Library, I started my experiment to implement the beloved Python functions range and filter in C++. Due to two very interesting comments to my last post, I revisit the function range. 

Today, I start an experiment. I want to implement beloved functions in Python in C++ using the ranges library. I'm curious about how it goes.

My last post C++20: The Ranges Library, gave you the first impression of the ranges library. Today's post is about functional patterns: function composition and lazy evaluation. They become first-class citizens in C++20.

Thanks to the ranges library in C++20, working with the Standard Template Library (STL) will become much more comfortable and powerful. The algorithms of the ranges library are lazy, can work directly on the container and can easily be composed. To make it short: The range library's comfort and power are due to its functional ideas. Let me show you what that means.