pub enum Never {}
Expand description
A helper type which emulates the standard never_type
(!
).
Trait Implementations
sourceimpl Error for Never
impl Error for Never
sourcefn description(&self) -> &str
fn description(&self) -> &str
👎Deprecated since 1.42.0: use the Display impl or to_string()
sourcefn cause(&self) -> Option<&dyn StdError>
fn cause(&self) -> Option<&dyn StdError>
👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting
sourceimpl HttpError for Never
impl HttpError for Never
sourcefn status_code(&self) -> StatusCode
fn status_code(&self) -> StatusCode
Returns an HTTP status code associated with this value.
sourcefn to_response(&mut self, _: &mut Input<'_>) -> Output
fn to_response(&mut self, _: &mut Input<'_>) -> Output
Generates a message body from this error value.
Auto Trait Implementations
impl RefUnwindSafe for Never
impl Send for Never
impl Sync for Never
impl Unpin for Never
impl UnwindSafe for Never
Blanket Implementations
sourceimpl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
sourceimpl<E> Fail for Ewhere
E: 'static + Error + Send + Sync,
impl<E> Fail for Ewhere
E: 'static + Error + Send + Sync,
sourcefn cause(&self) -> Option<&(dyn Fail + 'static)>
fn cause(&self) -> Option<&(dyn Fail + 'static)>
Returns a reference to the underlying cause of this failure, if it
is an error that wraps other errors. Read more
sourcefn backtrace(&self) -> Option<&Backtrace>
fn backtrace(&self) -> Option<&Backtrace>
Returns a reference to the
Backtrace
carried by this failure, if it
carries one. Read more