Explore the full potential of C++ by mastering the standard library.

Become a C++ Programmer

The C++ standard library is a collection of all the tools and utilities available in C++. It received its latest update in 2017, known as C++17. The update introduces many new features that further optimize our code. This module will help us fully grasp C++ and use it to its full potential.

C++ Standard Library

A [string view](http://en.cppreference.com/w/cpp/string/basic_string_view) is a non-owning reference to a string. It represents a view of a sequence of characters. This sequence of characters can be a C++ string or a C-string. A string view needs the header `<string_view>`. 

> 🔑 **A string view is a for copying optimized string**
>\
> From a birds-eye perspective the purpose of `std::string_view` is to avoid copying data that is already owned by someone else and to allow immutable access to a `std::string` like object. The string view is a kind of a restricted string that supports only immutable operations. Additionally, a string view `sv` has two additional mutating operations: `sv.remove_prefix` and `sv.remove_suffix`. 

String views are class templates parameterized by their character and their character trait. The character trait has a default. In contrast to a [string](https://www.educative.io/courses/cpp-standard-library-including-cpp-14-and-cpp-17/introduction-JYQ0E3Rmo62), a string view is non-owner and, therefore, needs no allocator.

The string view class builds itself on the string class. It restricts the operations that can be performed on a string.

Introduction