{"ast_node_type":"other","tokens":[{"end":96,"kind":"keyword","start":0,"text":"///"}]}
/// being differentiated). The other form is #[rustc_autodiff(Mode, ActivityList)] on top of the
/// macros. There are two forms. The pure one without args to mark primal functions (the functions
/// placeholder functions. We wrote the rustc_autodiff attributes ourself, so this should never