结构体 AcquireError 

pub struct AcquireError(/* 私有字段 */);

从 Semaphore::acquire 函数返回的错误。

仅当信号量已关闭时，acquire 操作才会失败。

trait 实现

impl Debug for AcquireError

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

使用给定的格式化器格式化此值。 更多信息

impl Display for AcquireError

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

使用给定的格式化器格式化此值。 更多信息

impl Error for AcquireError

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

返回此错误的更底层来源（若有）。 更多信息

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

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. 更多信息