pub struct OccupiedError<'a, K: 'a, V: 'a, A: Allocator + Clone = Global> {
    pub entry: OccupiedEntry<'a, K, V, A>,
    pub value: V,
}
🔬This is a nightly-only experimental API. (map_try_insert #82766)
Expand description

当键已经存在时,由 try_insert 返回的错误。

包含占用的条目和未插入的值。

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§entry: OccupiedEntry<'a, K, V, A>
🔬This is a nightly-only experimental API. (map_try_insert #82766)

map 中已被占用的条目。

§value: V
🔬This is a nightly-only experimental API. (map_try_insert #82766)

未插入的值,因为该条目已被占用。

Trait Implementations§

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impl<K: Debug + Ord, V: Debug, A: Allocator + Clone> Debug for OccupiedError<'_, K, V, A>

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

使用给定的格式化程序格式化该值。 Read more
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impl<'a, K: Debug + Ord, V: Debug, A: Allocator + Clone> Display for OccupiedError<'a, K, V, A>

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

使用给定的格式化程序格式化该值。 Read more
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impl<'a, K: Debug + Ord, V: Debug> Error for OccupiedError<'a, K, V>

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fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()
1.30.0 · source§

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

此错误的下级来源 (如果有)。 Read more
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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, demand: &mut Demand<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access #99301)
提供对用于错误报告的上下文的基于类型的访问。 Read more

Auto Trait Implementations§

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impl<'a, K, V, A> RefUnwindSafe for OccupiedError<'a, K, V, A>where A: RefUnwindSafe, K: RefUnwindSafe, V: RefUnwindSafe,

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impl<'a, K, V, A> Send for OccupiedError<'a, K, V, A>where A: Send, K: Send, V: Send,

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impl<'a, K, V, A> Sync for OccupiedError<'a, K, V, A>where A: Sync, K: Sync, V: Sync,

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impl<'a, K, V, A> Unpin for OccupiedError<'a, K, V, A>where A: Unpin, V: Unpin,

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impl<'a, K, V, A = Global> !UnwindSafe for OccupiedError<'a, K, V, A>

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

获取 selfTypeIdRead more
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impl<T> Borrow<T> for Twhere T: ?Sized,

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fn borrow(&self) -> &T

从拥有的值中一成不变地借用。 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

从拥有的值中借用。 Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

返回未更改的参数。

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

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fn into(self) -> U

调用 U::from(self)

也就是说,这种转换是 From<T> for U 实现选择执行的任何操作。

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impl<E> Provider for Ewhere E: Error + ?Sized,

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fn provide<'a>(&'a self, demand: &mut Demand<'a>)

🔬This is a nightly-only experimental API. (provide_any #96024)
数据提供者应实现此方法以提供他们能够通过使用 demand 提供的所有值。 Read more
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impl<T> ToString for Twhere T: Display + ?Sized,

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default fn to_string(&self) -> String

将给定值转换为 StringRead more
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

发生转换错误时返回的类型。
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

执行转换。
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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

发生转换错误时返回的类型。
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

执行转换。