Is there any way to convert Box> to Box>?

Question

Consider such code:

trait Foo {
    fn foo(&self);
}

fn consume_func(b: Box>) {
    unimplemented!();
}

fn produce_func() -> Box<         


        

Answer 1

Although you've stated you cannot change consume_func, others with similar issues can change it to accept a generic:

fn consume_func(b: Box>) {
    unimplemented!();
}