rust: pin-init: internal: pin_data: parse explicit `#[uses]` annotation

Add support for explicit self-referential annotations.

`#[uses]` attribute is used to mark what other field lifetimes are
captured by this field, and also the variance of the type in respect to the
field lifetimes. For example,

    #[uses('a: covariant, 'b: invariant)]

indicates that the field captures the field lifetime `'a` covariantly, and
field lifetime `'b` invariantly. Many types are covariant, so this is the
default variance if the variance is omitted (e.g. `#[uses('a)]`),
consistent with the automatically inferred borrow.

Acked-by: Benno Lossin <lossin@kernel.org>
Link: https://patch.msgid.link/20261008-dev-selfref-v2-15-e280b3c8fba5@garyguo.net/
Signed-off-by: Gary Guo <gary@garyguo.net>

0 files changed, 0 insertions, 0 deletions