The Motivation for the Ranges Library
Discover the rationale for introducing the Ranges library in C++20 by exploring its benefits over traditional algorithms. Learn how range views enable composing algorithms without unnecessary copying, resulting in clearer, more efficient code. This lesson explains the limitations of the standard algorithm library and how views from Ranges offer lazy evaluation and composability for better performance.
We'll cover the following...
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 ...