[−][src]Struct failure::SyncFailure
Wrapper for std
errors to make them Sync
.
This exists to coerce existing types that are only Error + Send + 'static
into a Fail
-compatible representation, most notably for
types generated by error-chain
.
Unfortunately, this requires wrapping the error in a Mutex
, which must
be locked for every Debug
/Display
. Therefore, this should be
something of a last resort in making the error work with failure
.
Methods
impl<E: Error + Send + 'static> SyncFailure<E>
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pub fn new(err: E) -> Self
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Wraps a non-Sync
Error
in order to make it implement Fail
.
Example
extern crate failure; use failure::{Error, SyncFailure}; use std::cell::RefCell; #[derive(Debug)] struct NonSyncError { // RefCells are non-Sync, so structs containing them will be // non-Sync as well. count: RefCell<usize>, } // implement Display/Error for NonSyncError... fn returns_error() -> Result<(), NonSyncError> { // Do stuff } fn my_function() -> Result<(), Error> { // without the map_err here, we end up with a compile error // complaining that NonSyncError doesn't implement Sync. returns_error().map_err(SyncFailure::new)?; // Do more stuff }
Trait Implementations
impl<E: Error + Send + 'static> Fail for SyncFailure<E>
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fn name(&self) -> Option<&str>
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Returns the "name" of the error. Read more
fn cause(&self) -> Option<&dyn Fail>
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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>
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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,
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D: Display + Send + Sync + 'static,
Self: Sized,
Provides context for this failure. Read more
fn compat(self) -> Compat<Self> where
Self: Sized,
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Self: Sized,
Wraps this failure in a compatibility wrapper that implements std::error::Error
. Read more
impl<T> Debug for SyncFailure<T> where
T: Debug,
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T: Debug,
impl<T> Display for SyncFailure<T> where
T: Display,
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T: Display,
Auto Trait Implementations
impl<T> Send for SyncFailure<T> where
T: Send,
T: Send,
impl<T> Sync for SyncFailure<T> where
T: Send,
T: Send,
Blanket Implementations
impl<E> Fail for E where
E: 'static + Error + Send + Sync,
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E: 'static + Error + Send + Sync,
fn name(&self) -> Option<&str>
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Returns the "name" of the error. Read more
fn cause(&self) -> Option<&dyn Fail>
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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>
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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,
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D: Display + Send + Sync + 'static,
Self: Sized,
Provides context for this failure. Read more
fn compat(self) -> Compat<Self> where
Self: Sized,
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Self: Sized,
Wraps this failure in a compatibility wrapper that implements std::error::Error
. Read more
impl<T> From for T
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impl<T, U> Into for T where
U: From<T>,
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U: From<T>,
impl<T> ToString for T where
T: Display + ?Sized,
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T: Display + ?Sized,
impl<T, U> TryFrom for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T> Borrow for T where
T: ?Sized,
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T: ?Sized,
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> BorrowMut for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T, U> TryInto for T where
U: TryFrom<T>,
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U: TryFrom<T>,