Gain insights into C++20 Concepts to enhance type safety. Delve into creating compiler-checked criteria for templates and improving error clarity for seamless generic code development.

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This course will walk you through the newest version of C++ 20, C++ Concepts.

You will go through one of the most significant new features in C++20, which is Concepts. Concepts allow you to create compiler-checked criteria for template parameters, revolutionizing the way you think about and develop generic code. You can use them to provide both syntactic and semantic requirements. They also allow you to explicitly express your goal in the type system. If something goes wrong, you'll get a clear error message from the compiler.

While useful, Concepts can be difficult to apply and even confusing sometimes. This course provides you with the knowledge you need to overcome these obstacles and move on to more complex topics.

Let's get started.

C++ Concepts: Improve Type Safety with C++ 20

In this chapter, we discussed in detail how to write our own concepts:

* We started by combining already existing concepts such as `std::integral<T>` and `std::floating_point<T>`.
* We also discussed what kind of combinations are valid, what it means to negate in the context of concepts, and how the compiler can find the most constrained constraint.
* We learned how we can express constraints. We defined constraints on what API an accepted type must have, then we expressed expectations on inner types, template aliases and specializations.


We also saw how to nest requirements. However, because we haven’t seen a robust example for nested concepts yet, we’ll look at those in the next (and final) chapter. 

Get an overview of the major points discussed in this chapter.

Introduction

The Concept Behind C++ Concepts

Four Ways to use Concepts in Functions

C++ Concepts with Classes

Concepts Shipped with the C++ Standard Library

How to Write Your Own C++ Concepts

How to Use C++ Concepts in Real Life

Summary

Conclusion