Function rustc_codegen_ssa::base::unsized_info
source ยท pub fn unsized_info<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>(
bx: &mut Bx,
source: Ty<'tcx>,
target: Ty<'tcx>,
old_info: Option<Bx::Value>,
) -> Bx::Value
Expand description
Retrieves the information we are losing (making dynamic) in an unsizing adjustment.
The old_info
argument is a bit odd. It is intended for use in an upcast,
where the new vtable for an object will be derived from the old one.