Grids in Rust, Part 2: const generics

Re:Grids in Rust, Part 2: const generics by brundolf on Monday April 05, 2021 @03:12PM (#26703284)

I see! That makes sense now. Unsized types are one of the Rust concepts that I haven't gotten a good handle on yet, probably mainly because they don't come up very often in practice. The only other one I know of is str, and I'm not even sure how I'd go about using a plain str.

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Re:Grids in Rust, Part 2: const generics by steveklabnik on Monday April 05, 2021 @03:20PM (#26703361)

Totally. It works the same way: it's gotta be behind a pointer. Arc<str> would be a signature for a threadsafe interned string, for example.

    use std::sync::Arc;
    
    fn foobar(s: &str) -> Arc<str> {
        Arc::from(s.to_string())
    }

You almost always can only create these sorts of values by casting.

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