Enum tokio::sync::SetError

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

Errors that can be returned from OnceCell::set.

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AlreadyInitializedError(T)

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

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InitializingError(T)

The cell is currently being initialized.

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impl<T> SetError<T>

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pub fn is_already_init_err(&self) -> bool

Whether SetError is SetError::AlreadyInitializedError.

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pub fn is_initializing_err(&self) -> bool

Whether SetError is SetError::InitializingError

Trait Implementations§

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

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

Formats the value using the given formatter. Read more
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impl<T> Display for SetError<T>

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

Formats the value using the given formatter. Read more
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impl<T: Debug> Error for SetError<T>

1.30.0 · source§

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

The lower-level source of this error, if any. Read more
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fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()
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fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting
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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. Read more
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impl<T: PartialEq> PartialEq<SetError<T>> for SetError<T>

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

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<T: Eq> Eq for SetError<T>

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impl<T> StructuralEq for SetError<T>

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impl<T> StructuralPartialEq for SetError<T>

Auto Trait Implementations§

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impl<T> RefUnwindSafe for SetError<T>where T: RefUnwindSafe,

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impl<T> Send for SetError<T>where T: Send,

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impl<T> Sync for SetError<T>where T: Sync,

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impl<T> Unpin for SetError<T>where T: Unpin,

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impl<T> UnwindSafe for SetError<T>where T: UnwindSafe,

Blanket Implementations§

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToString for Twhere T: Display + ?Sized,

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default fn to_string(&self) -> String

Converts the given value to a String. Read more
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.