request: OccupiedEntry as reference

[gituser-rs]

Thanks for such a good project.

There is one thing that could make it better. Dashmap gives access to struct fields in the same way as references (through Ref struct).

Here is how it works in dashmap:

let client = clients.get(&ip_addr).ok_or(StatusCode::FORBIDDEN)?
client.fingerprint; 

Same but using scc:

let client = clients.get(&ip_addr).ok_or(StatusCode::FORBIDDEN)?
let client = client.get();
client.fingerprint;

It's not very convenient to use it like this. Would be nice to have the same usage as in dashmap

[wvwwvwwv]

I briefly looked into https://doc.rust-lang.org/std/collections/hash_map/struct.OccupiedEntry.html, and found that std didn't implement any deref* methods. Unlike dashmap, the entry API of SCC is almost identical to that of std, and I'm reluctant to add a Deref implementation to OccupiedEntry of scc::HashMap. Let me think about this and look into other crates for a couple of days, and get back to you.

[gituser-rs]

I briefly looked into https://doc.rust-lang.org/std/collections/hash_map/struct.OccupiedEntry.html, and found that std didn't implement any deref* methods. Unlike dashmap, the entry API of SCC is almost identical to that of std, and I'm reluctant to add a Deref implementation to OccupiedEntry of scc::HashMap. Let me think about this and look into other crates for a couple of days, and get back to you.

How about making it as an optional feature? std HashMap::get returns reference to value but SCC HashMap::get returns OccupiedEntry, so you need to call get() again.

[wvwwvwwv]

Hm... HashMap::get returning Option<V> justifies your request to some extent.

[wvwwvwwv]

OK, it looks to be reasonable to add a deref impl to OccupiedEntry. The PR will be approved after tests.