Enum SetError

pub enum SetError<T> {
    AlreadyInitializedError(T),
    InitializingError(T),
}

Available on crate feature sync only.

Errors that can be returned from OnceCell::set.

Variants

AlreadyInitializedError(T)

The cell was already initialized when OnceCell::set was called.

InitializingError(T)

The cell is currently being initialized.

Implementations

impl<T> SetError<T>

pub fn is_already_init_err(&self) -> bool

Whether SetError is SetError::AlreadyInitializedError.

pub fn is_initializing_err(&self) -> bool

Whether SetError is SetError::InitializingError

Trait Implementations

impl<T: Debug> Debug for SetError<T>

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

Formats the value using the given formatter.

impl<T> Display for SetError<T>

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

Formats the value using the given formatter.

impl<T: Debug> Error for SetError<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: PartialEq> PartialEq for SetError<T>

fn eq(&self, other: &SetError<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: Eq> Eq for SetError<T>

impl<T> StructuralPartialEq for SetError<T>

Layout

Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.