Add Rust NewType Support

[CorrM]

Is it supported already and im doing something wrong?

#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize, SpacetimeType)]
pub struct AccountId(pub u64);

#[table(name = account)]
pub struct Account {
    #[primary_key]
    #[auto_inc]
    pub id: AccountId,
    pub created_at: Timestamp,
}

1. proc-macro derive panicked
   message: called `Option::unwrap()` on a `None` value
2. proc-macro panicked: called `Option::unwrap()` on a `None` value

the trait bound `for<'de> schema::account::AccountId: spacetimedb::Deserialize<'de>` is not satisfied.
the column type `schema::account::AccountId` does not implement `SpacetimeType`
   table column types all must implement `SpacetimeType`
   if you own the type, try adding `#[derive(SpacetimeType)]` to its definition
   the following other types implement trait `spacetimedb::SpacetimeType`:

[egormanga]

• See Implemented newtype pattern support for tuples #2957

[CorrM]

• See Implemented newtype pattern support for tuples #2957

I think best way to do it as a first step is to support the same currently supported(Column Types) types as underlying type.

Your example from PR:

#[derive(SpacetimeType)]
pub struct Position(vecmath::Vector3<f64>);

afaik if the underlying type are not derive Serialize, Deserialize no thing will work

[egormanga]

@CorrM That's just for usecase illustration purposes. No type will work that way without my patch, and at least some do with it.

[bfops]

Hey @CorrM, yes as @egormanga pointed out, this is not currently supported.

[CorrM]

@bfops any update?

[bfops]

Hi @CorrM, the full implementation of this feature is larger than a small PR.

In the meantime, does a struct with a single named field work for you?

[CorrM]

Hi @CorrM, the full implementation of this feature is larger than a small PR.

In the meantime, does a struct with a single named field work for you?

if you mean something like that, Yes:

#[derive(SpacetimeType)]
struct SomeTable {
    value: u64
}