Struct std::option::NoneError [−][src]
pub struct NoneError;
The error type that results from applying the try operator (?) to a None value. If you wish
to allow x? (where x is an Option<T>) to be converted into your error type, you can
implement impl From<NoneError> for YourErrorType. In that case, x? within a function that
returns Result<_, YourErrorType> will translate a None value into an Err result.
Trait Implementations
impl PartialOrd<NoneError> for NoneError[src]
impl PartialOrd<NoneError> for NoneError[src]pub fn partial_cmp(&self, other: &NoneError) -> Option<Ordering>[src]
#[must_use]pub fn lt(&self, other: &Rhs) -> bool1.0.0[src]
#[must_use]
pub fn lt(&self, other: &Rhs) -> bool#[must_use]pub fn le(&self, other: &Rhs) -> bool1.0.0[src]
#[must_use]
pub fn le(&self, other: &Rhs) -> bool#[must_use]pub fn gt(&self, other: &Rhs) -> bool1.0.0[src]
#[must_use]
pub fn gt(&self, other: &Rhs) -> bool#[must_use]pub fn ge(&self, other: &Rhs) -> bool1.0.0[src]
#[must_use]
pub fn ge(&self, other: &Rhs) -> boolimpl Copy for NoneError[src]
impl Eq for NoneError[src]
impl StructuralEq for NoneError[src]
impl StructuralPartialEq for NoneError[src]
Auto Trait Implementations
impl RefUnwindSafe for NoneError
impl Send for NoneError
impl Sync for NoneError
impl Unpin for NoneError
impl UnwindSafe for NoneError
Blanket Implementations
impl<T> Borrow<T> for T where
T: ?Sized, [src]
impl<T> Borrow<T> for T where
T: ?Sized, [src]pub fn borrow(&self) -> &TⓘNotable traits for &'_ mut F
impl<'_, F> Future for &'_ mut F where
F: Future + Unpin + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<R: Read + ?Sized> Read for &mut Rimpl<W: Write + ?Sized> Write for &mut W[src]
Notable traits for &'_ mut F
impl<'_, F> Future for &'_ mut F where
F: Future + Unpin + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<R: Read + ?Sized> Read for &mut Rimpl<W: Write + ?Sized> Write for &mut Wimpl<T> BorrowMut<T> for T where
T: ?Sized, [src]
impl<T> BorrowMut<T> for T where
T: ?Sized, [src]pub fn borrow_mut(&mut self) -> &mut TⓘNotable traits for &'_ mut F
impl<'_, F> Future for &'_ mut F where
F: Future + Unpin + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<R: Read + ?Sized> Read for &mut Rimpl<W: Write + ?Sized> Write for &mut W[src]
Notable traits for &'_ mut F
impl<'_, F> Future for &'_ mut F where
F: Future + Unpin + ?Sized, type Output = <F as Future>::Output;impl<'_, I> Iterator for &'_ mut I where
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<R: Read + ?Sized> Read for &mut Rimpl<W: Write + ?Sized> Write for &mut W