Struct EmptyError 

pub struct EmptyError<T> { /* private fields */ }

An error in which a non-empty value is expected but an empty value is observed.

Implementations

impl<T> EmptyError<T>

pub fn into_empty(self) -> T

Converts the error into the empty value.

pub fn take(self) -> (T, EmptyError<()>)

Takes the empty value out of the error, returning it and a unit error.

pub fn take_and_drop(self) -> EmptyError<()>

Takes the empty value out of the error and immediately drops it, returning a unit error.

pub fn as_empty(&self) -> &T

Converts the error to a reference to the empty value.

impl<T> EmptyError<&T>

pub fn into_owning(self) -> EmptyError<T::Owned>

where T: ToOwned,

Available on crate feature alloc only.

Maps the empty value from a borrowed type into its owned type.

Trait Implementations

impl<T: Clone> Clone for EmptyError<T>

fn clone(&self) -> EmptyError<T>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T> Debug for EmptyError<T>

fn fmt(&self, formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<T> Display for EmptyError<T>

fn fmt(&self, formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<T> Error for EmptyError<T>

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl<T> From<EmptyError<T>> for CardinalityError<T>

Available on crate feature arrayvec only.

fn from(error: EmptyError<T>) -> Self

Converts to this type from the input type.

impl<T: Hash> Hash for EmptyError<T>

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<T: PartialEq> PartialEq for EmptyError<T>

fn eq(&self, other: &EmptyError<T>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<T: Copy> Copy for EmptyError<T>

impl<T: Eq> Eq for EmptyError<T>

impl<T> StructuralPartialEq for EmptyError<T>