so I see Table has a get_pointer method. how would I round-trip it back into a table.

[walksanatora]

Or is that not something possible. and I should instead seek another method to basically pass tables from Rust into c#.

[sueun-dev]

to_pointer() (the get_pointer you mean) is one-way here. Its own doc says there's no way to convert the pointer back to its original value, it's just for hashing/identity, so you can't rebuild a Table from that *const c_void.

To hold a table and get it back, use the registry: let key = lua.create_registry_value(t)?; then later let t: Table = lua.registry_value(&key)?;. Tested on mlua 0.11.6, the returned table has the same to_pointer() as the original, so it's the same table, not a copy.

For handing tables to C#, don't pass the raw pointer. Give C# an opaque handle (an int id, or a boxed RegistryKey) and resolve it back to the Table on the Rust side when C# calls in.