Error is the error value in an operation's result.
Based on the two possible values, the operation may be retried.
Permanent means that it's impossible to execute the operation
successfully. This error is immediately returned from
Transient means that the error is temporary, the operation should be retried according to the backoff policy.
fn description(&self) -> &str[src]
By default all errors are transient. Permanent errors can
be constructed explicitly. This implementation is for making
the question mark operator (?) and the
try! macro to work.
impl<E> RefUnwindSafe for Error<E> where
impl<E> UnwindSafe for Error<E> where
type Error = Infallible
The type returned in the event of a conversion error.