Best practices

Let's consider practices that will help you out when working with the algorithms we've been discussing. I will start by highlighting the importance of actually exploiting the standard algorithms.

Using the constrained algorithms

The constrained algorithms under std::ranges introduced with C++20 offer some benefits over the iterator-based algorithms under std. The constrained algorithms do the following:

• Support projections, which simplifies custom comparisons of elements.
• Support ranges instead of iterator pairs. There is no need to pass begin() and end() iterators as separate arguments.
• Are easy to use correctly and provide descriptive error messages during compilation as a result of being constrained by C++ concepts.

It's my recommendation to start using the constrained algorithms over the iterator-based algorithms.

You may have noticed that this book uses iterator-based algorithms in a lot of places...