The Motivation for the Ranges Library

Before we get into the Ranges library itself, let’s discuss why it’s been added to C++20 and why we’d want to use it.

The Ranges library

With the introduction of the Ranges library to C++20 came some major improvements to how we benefit from the standard library when implementing algorithms. The following list shows the new features:

• Concepts that define requirements on iterators and ranges can now be better checked by the compiler and provide more help during development

• New overloads of all functions in the <algorithm> header are constrained with the concepts just mentioned and accept ranges as arguments rather than iterator pairs

• Constrained iterators in the iterator header

• Range ...