Struct DowncastToPyErr 

pub struct DowncastToPyErr;

Try to map a std::error::Error via a specific error type T to a PyErr by downcasting when used as MapErrorToPyErr;

Trait Implementations

impl MapErrorToPyErr for DowncastToPyErr

fn try_map<T: Error + 'static>( _py: Python<'_>, err: Box<dyn Error + 'static>, map: impl FnOnce(Box<T>) -> PyErr, ) -> Result<PyErr, Box<dyn Error + 'static>>

Try to map from a boxed err via the specific error type T or wrapped errors such as MyError<E> to a PyErr, or return the err.

fn try_map_send_sync<T: Error + 'static>( _py: Python<'_>, err: Box<dyn Error + Send + Sync + 'static>, map: impl FnOnce(Box<T>) -> PyErr, ) -> Result<PyErr, Box<dyn Error + Send + Sync + 'static>>

Try to map from a boxed err via the specific error type T or wrapped errors such as MyError<E> to a PyErr, or return the err.

fn try_map_ref<T: Error + 'static>( _py: Python<'_>, err: &(dyn Error + 'static), map: impl FnOnce(&T) -> PyErr, ) -> Option<PyErr>

Try to map from an err reference via the specific error type T or wrapped errors such as MyError<E> to a PyErr, or return None.