[−][src]Struct failure::Context

pub struct Context<D: Display + Send + Sync + 'static> { /* fields omitted */ }

An error with context around it.

The context is intended to be a human-readable, user-facing explanation for the error that has occurred. The underlying error is not assumed to be end-user-relevant information.

The Display impl for Context only prints the human-readable context, while the Debug impl also prints the underlying error.

Methods

impl<D: Display + Send + Sync + 'static> Context<D>[src]

pub fn new(context: D) -> Context<D>[src]

Creates a new context without an underlying error message.

pub fn get_context(&self) -> &D[src]

Returns a reference to the context provided with this error.

pub fn map<F, T>(self, op: F) -> Context<T> where
    F: FnOnce(D) -> T,
    T: Display + Send + Sync + 'static, [src]

Maps Context<D> to Context<T> by applying a function to the contained context.

Trait Implementations

impl<D: Display + Send + Sync + 'static> Fail for Context<D>[src]

fn context<D>(self, context: D) -> Context<D> where
    D: Display + Send + Sync + 'static,
    Self: Sized, [src]

Provides context for this failure. Read more

fn compat(self) -> Compat<Self> where
    Self: Sized, [src]

Wraps this failure in a compatibility wrapper that implements std::error::Error. Read more

impl<D> From<D> for Context<D> where
    D: Display + Send + Sync + 'static, [src]

impl<D: Display + Send + Sync + 'static> Debug for Context<D>[src]

impl<D: Display + Send + Sync + 'static> Display for Context<D>[src]

Auto Trait Implementations

impl<D> Send for Context<D>

impl<D> Sync for Context<D>

Blanket Implementations

impl<E> Fail for E where
    E: 'static + Error + Send + Sync, [src]

fn name(&self) -> Option<&str>[src]

Returns the "name" of the error. Read more

fn cause(&self) -> Option<&dyn Fail>[src]

Returns a reference to the underlying cause of this failure, if it is an error that wraps other errors. Read more

fn backtrace(&self) -> Option<&Backtrace>[src]

Returns a reference to the Backtrace carried by this failure, if it carries one. Read more

fn context<D>(self, context: D) -> Context<D> where
    D: Display + Send + Sync + 'static,
    Self: Sized, [src]

Provides context for this failure. Read more

fn compat(self) -> Compat<Self> where
    Self: Sized, [src]

Wraps this failure in a compatibility wrapper that implements std::error::Error. Read more

impl<T> From for T[src]

impl<T, U> Into for T where
    U: From<T>, [src]

impl<T> ToString for T where
    T: Display + ?Sized, [src]

impl<T, U> TryFrom for T where
    U: Into<T>, [src]

type Error = Infallible

The type returned in the event of a conversion error.

impl<T> Borrow for T where
    T: ?Sized, [src]

impl<T> Any for T where
    T: 'static + ?Sized, [src]

impl<T> BorrowMut for T where
    T: ?Sized, [src]

impl<T, U> TryInto for T where
    U: TryFrom<T>, [src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.