[−][src]Struct std::option::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 Clone for NoneError[src]
fn clone(&self) -> NoneError[src]
fn clone_from(&mut self, source: &Self)1.0.0[src]
Performs copy-assignment from source. Read more
impl PartialOrd<NoneError> for NoneError[src]
fn partial_cmp(&self, other: &NoneError) -> Option<Ordering>[src]
#[must_use]
fn lt(&self, other: &Rhs) -> bool1.0.0[src]
This method tests less than (for self and other) and is used by the < operator. Read more
#[must_use]
fn le(&self, other: &Rhs) -> bool1.0.0[src]
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
#[must_use]
fn gt(&self, other: &Rhs) -> bool1.0.0[src]
This method tests greater than (for self and other) and is used by the > operator. Read more
#[must_use]
fn ge(&self, other: &Rhs) -> bool1.0.0[src]
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
impl Ord for NoneError[src]
fn cmp(&self, other: &NoneError) -> Ordering[src]
fn max(self, other: Self) -> Self1.21.0[src]
Compares and returns the maximum of two values. Read more
fn min(self, other: Self) -> Self1.21.0[src]
Compares and returns the minimum of two values. Read more
impl Eq for NoneError[src]
impl Debug for NoneError[src]
impl PartialEq<NoneError> for NoneError[src]
fn eq(&self, other: &NoneError) -> bool[src]
#[must_use]
fn ne(&self, other: &Rhs) -> bool1.0.0[src]
This method tests for !=.
impl Copy for NoneError[src]
impl Hash for NoneError[src]
Auto Trait Implementations
Blanket Implementations
impl<T, U> TryFrom for T where
U: Into<T>, [src]
U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src]
impl<T> From for T[src]
impl<T, U> TryInto for T where
U: TryFrom<T>, [src]
U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>[src]
impl<T, U> Into for T where
U: From<T>, [src]
U: From<T>,
impl<T> Borrow for T where
T: ?Sized, [src]
T: ?Sized,
impl<T> BorrowMut for T where
T: ?Sized, [src]
T: ?Sized,
ⓘImportant traits for &'_ mut Ifn borrow_mut(&mut self) -> &mut T[src]
impl<T> Any for T where
T: 'static + ?Sized, [src]
T: 'static + ?Sized,
impl<T> ToOwned for T where
T: Clone, [src]
T: Clone,