Struct std::collections::btree_map::OccupiedError

pub struct OccupiedError<'a, K, V, A = Global>where
    K: 'a,
    V: 'a,
    A: Allocator + Clone,{
    pub entry: OccupiedEntry<'a, K, V, A>,
    pub value: V,
}

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

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。

Fields

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

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

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

使用给定的格式化程序格式化该值。

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

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

使用给定的格式化程序格式化该值。

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

fn description(&self) -> &str

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

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

此错误的下级来源 (如果有)。

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)

提供对用于错误报告的上下文的基于类型的访问。