Struct TypeErasedError

pub struct TypeErasedError { /* private fields */ }

A new-type around Box<dyn Error + Debug + Send + Sync> that also implements Error

Implementations

impl TypeErasedError

pub fn new<T: StdError + Send + Sync + Debug + 'static>(value: T) -> Self

Create a new TypeErasedError from value of type T

pub fn downcast<T: StdError + Debug + Send + Sync + 'static>( self, ) -> Result<Box<T>, Self>

Downcast into a Box<T>, or return Self if it is not a T.

pub fn downcast_ref<T: StdError + Debug + Send + Sync + 'static>( &self, ) -> Option<&T>

Downcast as a &T, or return None if it is not a T.

pub fn downcast_mut<T: StdError + Debug + Send + Sync + 'static>( &mut self, ) -> Option<&mut T>

Downcast as a &mut T, or return None if it is not a T.

pub fn doesnt_matter() -> Self

Returns a TypeErasedError with a fake/test value with the expectation that it won’t be downcast in the test.

Trait Implementations

impl Debug for TypeErasedError

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

Formats the value using the given formatter.

impl Display for TypeErasedError

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

Formats the value using the given formatter.

impl Error for TypeErasedError

fn source(&self) -> Option<&(dyn StdError + '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.

impl From<TypeErasedError> for TypeErasedBox

fn from(value: TypeErasedError) -> Self

Converts to this type from the input type.