How to use const in C++ by Sándor Dargo_468 x 60 copy.png

In this course, you will learn about the C++ keyword const and its behaviour under different usage conditions, including local, global and static contexts. This course will help you to understand const and its implications when you attempt to return pointers and references in C++. By the end of the course, you will have a solid grip on const and its usage in preventing any accidental change of data.

Secure Coding Practices in C++: A Deep Dive into const

## Silent copy for a move request

As we saw previously, `const` variables lose their ability to use move semantics. This means that instead, they use copy semantics (`=`) for all move requests. 

Because the variable cannot change, C++ cannot generate any of the special functions that involve affecting the variable, such as move.

Let's look at an example to make it clearer.

A silent copy for a move request without move semantics is demonstrated below:

# Silent copy for a move request

As we saw previously, `const` variables lose their ability to use move semantics. This means that instead, they use copy semantics (`=`) for all move requests. 

Because the variable cannot change, C++ cannot generate any of the special functions that involve affecting the variable, such as move.

Let's look at an example to make it clearer.

A silent copy for a move request without move semantics is demonstrated below:

Learn about move semantics, its purpose, and how it is used. 

Move Semantics

Learn about move semantics, its purpose, and how it is used.

Introduction

Arguments using const

Local Variables

Local Members

Functions

Return Types

const Parameters

const and Smart Pointers

Rvalue References

Summary

Move Semantics

Silent copy for a move request