pub trait Residual<O> {
type TryType: Try<Output = O, Residual = Self>;
}
🔬This is a nightly-only experimental API. (
try_trait_v2_residual
)Available on crate feature
mtls
only.Expand description
Allows retrieving the canonical type implementing Try
that has this type
as its residual and allows it to hold an O
as its output.
If you think of the Try
trait as splitting a type into its Try::Output
and Try::Residual
components, this allows putting them back together.
For example,
Result<T, E>: Try<Output = T, Residual = Result<Infallible, E>>
,
and in the other direction,
<Result<Infallible, E> as Residual<T>>::TryType = Result<T, E>
.