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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c++20

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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

## Problem
Write a concept for a container with the following functions:
* **Insert:** This takes an instance of the contained type and returns void.
* **Pop:** This takes an index and returns the contained type. 

The concept `requires` that it has a member type called `size_type`.

Try it yourself first. If you have trouble getting to the solution, you can always press the “Show Solution” button to see how the problem can be solved. We’ll go through the in-depth solution in the next lesson.

Good luck!

# Problem
Write a concept for a container with the following functions:
* **Insert:** This takes an instance of the contained type and returns void.
* **Pop:** This takes an index and returns the contained type. 

The concept `requires` that it has a member type called `size_type`.

Try it yourself first. If you have trouble getting to the solution, you can always press the “Show Solution” button to see how the problem can be solved. We’ll go through the in-depth solution in the next lesson.

Good luck!

Let’s implement a concept for a container ourselves.

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

Challenge: Concept for a Container

Problem