Enum tokio::sync::SetError

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

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)>

The lower-level source of this error, if any.

fn backtrace(&self) -> Option<&Backtrace>

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

Returns a stack backtrace, if available, of where this error occurred.

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

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

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

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &SetError<T>) -> bool

This method tests for !=.

impl<T> StructuralPartialEq for SetError<T>