pub trait FromResidual<R = <Self as Try>::Residual> {
// Required method
fn from_residual(residual: R) -> Self;
}🔬This is a nightly-only experimental API. (
try_trait_v2 #84277)Expand description
Used to specify which residuals can be converted into which crate::ops::Try types.
Every Try type needs to be recreatable from its own associated
Residual type, but can also have additional FromResidual implementations
to support interconversion with other Try types.
Required Methods§
Sourcefn from_residual(residual: R) -> Self
🔬This is a nightly-only experimental API. (try_trait_v2 #84277)
fn from_residual(residual: R) -> Self
try_trait_v2 #84277)Constructs the type from a compatible Residual type.
This should be implemented consistently with the branch method such
that applying the ? operator will get back an equivalent residual:
FromResidual::from_residual(r).branch() --> ControlFlow::Break(r).
(The residual is not mandated to be identical when interconversion is involved.)
§Examples
Dyn Compatibility§
This trait is not dyn compatible.
In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.