Convert string_view to string

To convert a std::string_view back to a std::string, you need to create a new std::string object and pass the std::string_view to its constructor.

This is necessary because std::string_view provides a view over a string without owning the data, while std::string owns and manages the data.

Here's an example:

1#include <iostream>
2#include <string>
3#include <string_view>
4
5int main() {
6  std::string_view view{"Hello, world"};
7  std::string str{view};  
8
9  std::cout << str;
10}

1Hello, world

In this example, std::string str{view}; constructs a new std::string by copying the data from the std::string_view. This way, str owns its data, and you can modify it independently of the original view.

Remember, constructing a std::string from a std::string_view involves copying the data, which can be expensive for large strings. Always consider the performance implications in your specific use case.