Struct ErrCtx 

pub struct ErrCtx<E, T> {
    pub inner: E,
    pub ctx: T,
}

Wrapper around an error providing additional context.

Fields

inner: E

Inner error

ctx: T

Context associated with error

Implementations

impl<E, T> ErrCtx<E, T>

pub fn new(error: E, ctx: T) -> Self

Creates a new ErrCtx from an error and context type.

impl<E> ErrCtx<E, PathBuf>

pub fn f<P: AsRef<Path>>(path: P) -> Box<dyn FnOnce(E) -> Self>

Convenience method that creates a closure which converts an io::Error to a IoErrCtx

This is designed for simplifying the conversion of io::Errors using .map_err.

For example

let res = res.map_err(|e| PathCtx::new(e, path));

can become

let res = res.map_err(PathCtx::f(path));

Trait Implementations

impl<E: Debug, T: Debug> Debug for ErrCtx<E, T>

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

Formats the value using the given formatter.

impl<E, T: Debug> Display for ErrCtx<E, T>

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

Formats the value using the given formatter.

impl<E: Error + 'static, T: Debug> Error for ErrCtx<E, T>

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

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

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

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.