[−][src]Struct core::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 Copy 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 Eq for NoneError[src]
impl Ord for NoneError[src]
fn cmp(&self, other: &NoneError) -> Ordering[src]
fn max(self, other: Self) -> Self where
Self: Sized, 1.21.0[src]
Self: Sized,
Compares and returns the maximum of two values. Read more
fn min(self, other: Self) -> Self where
Self: Sized, 1.21.0[src]
Self: Sized,
Compares and returns the minimum of two values. Read more
fn clamp(self, min: Self, max: Self) -> Self where
Self: Sized, [src]
Self: Sized,
Restrict a value to a certain interval. 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 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 Hash for NoneError[src]
fn hash<__H: Hasher>(&self, state: &mut __H)[src]
fn hash_slice<H: Hasher>(data: &[Self], state: &mut H) where
Self: Sized, 1.3.0[src]
Self: Sized,
Feeds a slice of this type into the given [Hasher]. Read more
impl Debug for NoneError[src]
Auto Trait Implementations
Blanket Implementations
impl<T, U> Into<U> for T where
U: From<T>, [src]
U: From<T>,
impl<T> From<T> for T[src]
impl<T, U> TryInto<U> 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> TryFrom<U> 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(U) -> Result<T, <T as TryFrom<U>>::Error>[src]
impl<T> Borrow<T> for T where
T: ?Sized, [src]
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized, [src]
T: ?Sized,
fn borrow_mut(&mut Self) -> &mut T[src]
impl<T> Any for T where
T: 'static + ?Sized, [src]
T: 'static + ?Sized,