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
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