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 Hash for NoneError[src]
impl Hash for NoneErrorfn hash<__H>(&self, state: &mut __H) where
__H: Hasher, [src]
fn hash<__H>(&self, state: &mut __H) where
__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]
fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher, Feeds a slice of this type into the given [Hasher]. Read more
impl Clone for NoneError[src]
impl Clone for NoneErrorfn clone(&self) -> NoneError[src]
fn clone(&self) -> NoneErrorReturns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)1.0.0[src]
fn clone_from(&mut self, source: &Self)Performs copy-assignment from source. Read more
impl Debug for NoneError[src]
impl Debug for NoneErrorfn fmt(&self, f: &mut Formatter) -> Result<(), Error>[src]
fn fmt(&self, f: &mut Formatter) -> Result<(), Error>Formats the value using the given formatter. Read more
impl PartialOrd<NoneError> for NoneError[src]
impl PartialOrd<NoneError> for NoneErrorfn partial_cmp(&self, other: &NoneError) -> Option<Ordering>[src]
fn partial_cmp(&self, other: &NoneError) -> Option<Ordering>This method returns an ordering between self and other values if one exists. Read more
#[must_use]
fn lt(&self, other: &Rhs) -> bool1.0.0[src]
#[must_use]
fn lt(&self, other: &Rhs) -> boolThis 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]
#[must_use]
fn le(&self, other: &Rhs) -> boolThis 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]
#[must_use]
fn gt(&self, other: &Rhs) -> boolThis 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]
#[must_use]
fn ge(&self, other: &Rhs) -> boolThis method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
impl Ord for NoneError[src]
impl Ord for NoneErrorfn cmp(&self, other: &NoneError) -> Ordering[src]
fn cmp(&self, other: &NoneError) -> OrderingThis method returns an Ordering between self and other. Read more
fn max(self, other: Self) -> Self1.21.0[src]
fn max(self, other: Self) -> SelfCompares and returns the maximum of two values. Read more
fn min(self, other: Self) -> Self1.21.0[src]
fn min(self, other: Self) -> SelfCompares and returns the minimum of two values. Read more
impl Eq for NoneError[src]
impl Eq for NoneErrorimpl PartialEq<NoneError> for NoneError[src]
impl PartialEq<NoneError> for NoneErrorfn eq(&self, other: &NoneError) -> bool[src]
fn eq(&self, other: &NoneError) -> boolThis method tests for self and other values to be equal, and is used by ==. Read more
#[must_use]
fn ne(&self, other: &Rhs) -> bool1.0.0[src]
#[must_use]
fn ne(&self, other: &Rhs) -> boolThis method tests for !=.
impl Copy for NoneError[src]
impl Copy for NoneError