Clone unexpectedly doesn't clone contents

[nappa85]

Being the main struct internally an Arc<Inner>, when the user clones it's simply getting a new smart pointer to the same underlying data, that would be unexpected if paragoned to std HashMap.

Plus, in some examples, ShardMap is wrapped in an Arc, making it a double level of indirection without gainin nothing.

I think in Rust philosophy Arc should be user's duty and not hardcoded inside the struct.

[willothy]

I've gone back and forth a few times about this - I totally agree that leaving Arc-ing something up to the API consumer, but I also want to allow holding strong references into a specific shard for a 'static lifetime at some point, which would require an Arc'd map.

Right now, I'm thinking of implementing some methods specifically for self: Arc<Self> so that I can allow holding strong references if the type is wrapped in an Arc but still leave that up to the user. Thoughts?