Programming Challenge 12

Description

Go to this website and find an interesting C++17/20 feature specifically to discuss. Make an example of your own for the feature and explain the feature well. You can submit as many examples as you want. Each example can count either for an attendance point or as a challenge point depending on what you need.

Details

Name the files and program using the following naming scheme example_feature_name.cpp.
In your top file comment, provide the explanation of the feature.