Expand description
Derive macro for masterror::Error.
This crate is not intended to be used directly. Re-exported as
masterror::Error.
The From<T> for AppError conversion generated by #[app_error(...)]
attaches the domain error as the source of the produced AppError,
keeping it downcastable and part of the error chain. Attaching requires
T: Send + Sync + 'static; use the no_source flag in
#[app_error(...)] to opt out and drop the domain error during
conversion instead.