Serde: Question about Zero-Copy Deserialization lifetime error

[Boscop]

Why am I getting this lifetime error?

Thanks!

[dtolnay]

Check out https://serde.rs/lifetimes.html and https://serde.rs/borrow.html.

[Boscop]

Thanks, I got it working for structs with #[serde(borrow)] but how can I make it work for enums?

#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub enum Msg<'a> {
    #[serde(borrow)]
    System(SystemTransaction<'a>),
    #[serde(borrow)]
    Item(ItemTransaction<'a>),
}

error: proc-macro derive panicked
help: message: 2 errors:
    # unknown serde variant attribute `borrow`
    # unknown serde variant attribute `borrow`

[hcpl]

@Boscop this is a field attribute, not a variant one:

#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub enum Msg<'a> {
    System(#[serde(borrow)] SystemTransaction<'a>),
    Item(#[serde(borrow)] ItemTransaction<'a>),
}

[dtolnay]

929 tracks making it work for newtype variants. I would love a PR if anyone has time to implement it.