syntax_data: {"ast_node_type":"other","tokens":[{"end":43,"kind":"keyword","start":0,"text":"ty::Int(int_width)"}]}
source_snippet:                     ty::Int(int_width) => {
context_before:                     ty::Uint(_) => (rhs.to_copy(), rhs_ty),
context_after:                         let uint_ty = Ty::new_uint(self.tcx, int_width.to_unsigned());