Cannot use lifetime-parameterized errors as sources

[shepmaster]

Code like this won’t work:

#[derive(Debug, Snafu)]
enum Error<T> {
    Generic { source: GenericError<‘a, T> },
}

We need a reference with the ’static bound to be able to call Error::source.

We could perhaps disable the ability to call Error::source by just returning None.

[Kannen]

Could not Snafu also conditionally supports error types as:

#derive(Debug, Snafu)
enum Error<T> {
     Foo{ source: T}
}

I suppose it could be done by detecting that a source depend on a generic parameter and then, for each struct/trait generated by snafu add a WherePredicate T: 'static + Error

[shepmaster]

That certainly seems like an avenue worth pursuing! Sometimes the compiler errors arising from conditional implementations are hard to decipher though.