What are the differences between std::string_view and std::string in C++17?

What are the differences between std::string_view and std::string in C++17?

In C++17, std::string_view is a lightweight, non-owning view of a string, while std::string is a mutable, owning string type.

When should I use std::string_view instead of std::string?

Use std::string_view when you want to avoid unnecessary copies of strings, especially for function parameters.

Are there any performance benefits to using std::string_view?

Yes, std::string_view can improve performance by reducing memory allocations and copies, especially in large strings.

Can std::string_view be used with string literals?

Absolutely! std::string_view can be initialized directly from string literals, making it very convenient.