C++ separates string and string_view. And they're not fully compatible. (Ex. you can't concat cross-type !?).

Rust has str, &str, String Box<str>, ... ?

In the spirit of "a slice of a string is still a string", why not pack it all into a single type ? And offer security in the process.

Here's the scheme : https://github.com/alcover/buffet/raw/main/assets/schema.png

Here's the code : https://github.com/alcover/buffet

NB: I'm talking string/byte buffer. Higher string tooling like Utf8 would go a layer above.