Struct alloc::collections::btree_map::OccupiedError

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)

The error returned by try_insert when the key already exists.

Contains the occupied entry, and the value that was not inserted.

Fields

entry: OccupiedEntry<'a, K, V, A>

🔬This is a nightly-only experimental API. (map_try_insert #82766)

The entry in the map that was already occupied.

value: V

🔬This is a nightly-only experimental API. (map_try_insert #82766)

The value which was not inserted, because the entry was already occupied.

Trait Implementations

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

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

Formats the value using the given formatter.

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

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

Formats the value using the given formatter.

impl<'a, K: Debug + Ord, V: Debug> Error for OccupiedError<'a, K, V>

fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()

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

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

fn type_id(&self, _: Internal) -> TypeIdwhere Self: 'static,

🔬This is a nightly-only experimental API. (error_type_id #60784)

Gets the TypeId of self.

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

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting

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

🔬This is a nightly-only experimental API. (error_generic_member_access #99301)

Provides type based access to context intended for error reports.