syntax_data: {"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"&ExprKind::NamedConst"}]}
source_snippet:         &ExprKind::NamedConst { def_id, args, user_ty: _ } => {
context_before:         &ExprKind::ZstLiteral { user_ty: _ } => ty::Const::zero_sized(tcx, node.ty),
context_after:             let uneval = ty::UnevaluatedConst::new(def_id, args);