{"ast_node_type":"other","tokens":[{"end":48,"kind":"keyword","start":0,"text":"ExprKind::Cast(cast_expr,"}]}
                    ExprKind::Cast(cast_expr, _)
                    // (fn_ptr as *<const/mut> <ty>) == (0 as <ty>)
                        if let ExprKind::Lit(spanned) = cast_expr.kind