Crate derive_bounded 

Collection of derive macros with explicitable bounds

They derive the matching trait but have an optional bounded_to attribute to override the bounds.

use derive_bounded::Clone;

trait Trait {
    type B: Clone;
}

#[derive(Clone)]
#[bounded_to(T::B)]
struct A<T: Trait> {
    f: T::B,
}

#[derive(Clone)]
#[bounded_to(T::B)]
struct B<T: Trait> {
    f: A<T>,
}

The auto-generated impl for Clone will have a where clause with T::B: Clone instead of T: Clone.

As this version there are few known limitations:

• The macro does not auto-generate the where clause for associated traits, e.g. A in the example needs the bounded_to attribute

Later versions will address those.

Derive Macros

Clone

Derive Clone

Debug

Derive Debug

Default

Derive Default

Eq

Derive Eq

PartialEq

Derive PartialEq