Function rustc_mir_transform::elaborate_box_derefs::build_projection

pub fn build_projection<'tcx>(
    unique_ty: Ty<'tcx>,
    nonnull_ty: Ty<'tcx>,
    ptr_ty: Ty<'tcx>
) -> [PlaceElem<'tcx>; 3]

Constructs the projection needed to access a Box’s pointer