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. Read more

impl<T> Display for SetError<T>

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

Formats the value using the given formatter. Read more

impl<T: Eq> Eq for SetError<T>

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

1.30.0 ·

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

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

1.0.0 ·

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

1.0.0 ·

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. Read more

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

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

Equality operator ==. Read more

1.0.0 (const: unstable) ·

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

Inequality operator !=. Read more

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

Auto Trait Implementations

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

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

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

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

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

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

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

Blanket Implementations

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

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T
where T: ?Sized,

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

impl<T> Instrument for T

fn instrument(self, span: Span) -> Instrumented<Self> ⓘ

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

fn in_current_span(self) -> Instrumented<Self> ⓘ

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

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

fn into(self) -> U

Calls U::from(self).

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

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

fn to_string(&self) -> String

Converts the given value to a String. Read more

impl<T, U> TryFrom for T
where U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

impl<T, U> TryInto for T
where U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

impl<T> WithSubscriber for T

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> ⓘ
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more

fn with_current_subscriber(self) -> WithDispatch<Self> ⓘ

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more

Enum SetError

Variants

AlreadyInitializedError(T)

InitializingError(T)

Implementations

impl<T> SetError<T>

pub fn is_already_init_err(&self) -> bool

pub fn is_initializing_err(&self) -> bool

Trait Implementations

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

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

impl<T> Display for SetError<T>

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

impl<T: Eq> Eq for SetError<T>

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

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

fn description(&self) -> &str

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

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

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

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

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

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

Auto Trait Implementations

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

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

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

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

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

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

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

Blanket Implementations

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

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for Twhere T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for Twhere T: ?Sized,

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

impl<T> From<T> for T

fn from(t: T) -> T

impl<T> Instrument for T

fn instrument(self, span: Span) -> Instrumented<Self> ⓘ

fn in_current_span(self) -> Instrumented<Self> ⓘ

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

fn into(self) -> U

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

fn to_string(&self) -> String

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

type Error = Infallible

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

impl<T> WithSubscriber for T

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> ⓘwhere S: Into<Dispatch>,

fn with_current_subscriber(self) -> WithDispatch<Self> ⓘ

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

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

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

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

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

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

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

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

impl<T> Borrow<T> for T
where T: ?Sized,

impl<T> BorrowMut<T> for T
where T: ?Sized,

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

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

impl<T, U> TryFrom<U> for T
where U: Into<T>,

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> ⓘ
where S: Into<Dispatch>,