Struct pavo_common::sys_error::SysError

pub struct SysError(_);

定义系统错误。

Implementations

impl SysError

pub fn last() -> Self

从系统当前 errno 创建一个 SysError 对象。

pub fn is_err(self) -> bool

检测是否为出错状态。

pub fn is_ok(self) -> bool

检测是否为无错状态。

pub fn map_or<T>(self, other: T) -> Result<T, SysError>

当无错时将返回值映射为其他值。

pub fn to_str(&self) -> Cow<str>

返回文本描述。

Trait Implementations

impl Clone for SysError

fn clone(&self) -> SysError

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for SysError

impl Debug for SysError

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

Formats the value using the given formatter.

impl Default for SysError

fn default() -> SysError

Returns the "default value" for a type.

impl Display for SysError

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

Formats the value using the given formatter.

impl Eq for SysError

impl Error for SysError

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

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

fn backtrace(&self) -> Option<&Backtrace>

🔬 This is a nightly-only experimental API. (backtrace)

Returns a stack backtrace, if available, of where this error occurred.

fn description(&self) -> &str

Deprecated since 1.42.0:

use the Display impl or to_string()

if let Err(e) = "xc".parse::<u32>() { // Print e itself, no need for description(). eprintln!("Error: {}", e); }

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

Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

impl From<i32> for SysError

fn from(val: i32) -> Self

Performs the conversion.

impl Into<i32> for SysError

fn into(self) -> i32

Performs the conversion.

impl PartialEq<SysError> for SysError

fn eq(&self, other: &SysError) -> bool

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl StructuralEq for SysError

impl StructuralPartialEq for SysError