Struct std::option::NoneError
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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 Clone for NoneError[src]
fn clone(&self) -> NoneError[src]
Returns a copy of the value. Read more
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, __arg_0: &NoneError) -> Option<Ordering>[src]
This method returns an ordering between self and other values if one exists. Read more
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
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
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
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 Eq for NoneError[src]
impl Hash for NoneError[src]
fn hash<__H>(&self, __arg_0: &mut __H) where
__H: Hasher, [src]
__H: Hasher,
Feeds this value into the given [Hasher]. Read more
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher, 1.3.0[src]
H: Hasher,
Feeds a slice of this type into the given [Hasher]. Read more
impl Copy for NoneError[src]
impl Ord for NoneError[src]
fn cmp(&self, __arg_0: &NoneError) -> Ordering[src]
This method returns an Ordering between self and other. Read more
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 PartialEq<NoneError> for NoneError[src]
fn eq(&self, __arg_0: &NoneError) -> bool[src]
This method tests for self and other values to be equal, and is used by ==. Read more
fn ne(&self, other: &Rhs) -> bool1.0.0[src]
This method tests for !=.