[][src]Struct failure::SyncFailure

pub struct SyncFailure<T> { /* fields omitted */ }

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.


impl<E: Error + Send + 'static> SyncFailure<E>[src]

pub fn new(err: E) -> Self[src]

Wraps a non-Sync Error in order to make it implement Fail.


extern crate failure;

use failure::{Error, SyncFailure};
use std::cell::RefCell;

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.
    // Do more stuff

Trait Implementations

impl<T> Debug for SyncFailure<T> where
    T: Debug

impl<T> Display for SyncFailure<T> where
    T: Display

impl<E: Error + Send + 'static> Fail for SyncFailure<E>[src]

Auto Trait Implementations

impl<T> RefUnwindSafe for SyncFailure<T>

impl<T> Send for SyncFailure<T> where
    T: Send

impl<T> Sync for SyncFailure<T> where
    T: Send

impl<T> Unpin for SyncFailure<T> where
    T: Unpin

impl<T> UnwindSafe for SyncFailure<T>

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized

impl<T> Borrow<T> for T where
    T: ?Sized

impl<T> BorrowMut<T> for T where
    T: ?Sized

impl<E> Fail for E where
    E: 'static + Error + Send + Sync

impl<T> From<T> for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, 

impl<T> ToString for T where
    T: Display + ?Sized

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 

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

The type returned in the event of a conversion error.