© Ray Lischner 2020
R. LischnerExploring C++20https://doi.org/10.1007/978-1-4842-5961-0_70

70. Concepts, Traits, and Policies

Ray Lischner1 
(1)
Ellicott City, MD, USA
 

Although you may still be growing accustomed to templates, it’s time to explore some common tools used to write templates: concepts, traits, and policies. Programming with concepts relates closely to traits, which relate closely to policies. Together and separately, they probably introduce a new programming style for you, but this style forms the foundation for the C++ standard library. As you will discover in this Exploration, these techniques are extremely flexible and powerful. This Exploration looks at these techniques and how to take advantage of them.

Case Study: Iterators

Consider ...

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