We now have the checks to ensure that lifetime relations are what is expected, we can generate the slot projections in `generate_pin_data` so self-referential struct can be implemented. New slot and guard types are defined (`SelfRefSlot` and `SelfRefDropGuard`) which gives the generated let bindings longer lifetime than the guard themselves. Have `__make_closure` take `data` back as an argument. This gives `#[pin_data]` an opportunity to change the type to add lifetimes. Higher-ranked trait bound on `__make_closure` is used to ensure that the initialization closure cannot make arbitrary assumptions of those lifetimes. Acked-by: Benno Lossin <lossin@kernel.org> Link: https://patch.msgid.link/20261008-dev-selfref-v2-8-e280b3c8fba5@garyguo.net/ Signed-off-by: Gary Guo <gary@garyguo.net>