Help: associated type in trait that implements a trait with a lifetime parameter

help
1

The associated type should implement the serde::Deserialize trait and own all its data, but I'm getting lifetime errors that make no sense to me when trying to convert a json string into an Output in a function.

pub trait Private<'a> {
    type Output: serde::Deserialize<'a>;
}
2

I think you want the following:

pub trait Private {
    // the output type does not need to borrow anything
    type Output: for<'a> serde::Deserialize<'a>;
}

And this is basically DeserializeOwned in serde::de - Rust :slight_smile:

1 Like
3

Thanks, the DeserializeOwned trait is what I needed here.