derail 0.3.0

An alternative to `core::error::Error`.
Documentation 
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use derail::Visitor;

fn consume<V>(_: V)
where
    V: Visitor,
{
}

#[test]
fn box_impl() {
    #[expect(dead_code)]
    fn produce(x: Box<dyn Visitor<Details = ()>>) {
        consume(x);
    }
}