Struct ErrorScopeGuard

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pub struct ErrorScopeGuard { /* private fields */ }

Expand description

Guard for an error scope pushed with Device::push_error_scope().

Call pop() to pop the scope and get a future for the result. If the guard is dropped without being popped explicitly, the scope will still be popped, and the captured errors will be dropped.

This guard is neither Send nor Sync, as error scopes are handled on a per-thread basis when the std feature is enabled.

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impl ErrorScopeGuard

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pub fn pop(self) -> impl Future<Output = Option<Error>> + WasmNotSend

Pops the error scope.

Returns a future which resolves to the error captured by this scope, if any. The pop takes effect immediately; the future does not need to be awaited before doing work that is outside of this error scope.

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impl Drop for ErrorScopeGuard

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fn drop(&mut self)

Executes the destructor for this type. Read more

Auto Trait Implementations§

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impl !UnwindSafe for ErrorScopeGuard

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

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impl<T> Downcast<T> for T

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fn downcast(&self) -> &T

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impl<T> Downcast for T
where T: Any,

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fn into_any(self: Box<T>) -> Box<dyn Any>

Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait.

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Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait.

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fn as_any(&self) -> &(dyn Any + 'static)

Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.

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Convert &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s.

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

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Instruments this type with the current Span, returning an Instrumented wrapper. Read more

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Calls U::from(self).

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Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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