Get the downcast and underlying error message of the enum

[0cv]

I've many Enums Errors and I find myself writing a list of if/else going through each of these enums in order to downcast the error to the right type, but for most cases, the only aspect I'm interested in is to know:

1- Which enum / variant caused the error
2- Retrieve the #[error(...)] message

So I've to write something like:

if let Some(my_error) = e.downcast_ref::<EnumError1>() {
    // my_error has now the underlying data of EnumError1
} else if let Some(my_error) = e.downcast_ref::<EnumError2>() {
    // my_error has now the underlying data of EnumError2
} else if .....

Is there any more idiomatic way to achieve 1- and 2- than to go through all the enums (and especially not forget any, since it's not a proper match)?

[dtolnay]

This crate does not sound like the right fit for the use case you are describing. With a caller that needs to exhaustively handle a range of distinct error conditions, representing the error as an enum would be preferred.

match e {
    MyError::Error1(e) => ...
    MyError::Error2(e) => ...
}