{"ast_node_type":"variable","tokens":[{"end":60,"kind":"keyword","start":0,"text":"if"}]}
        if let Some((e, pat)) = borrow_or_assign(cx, expr) {
    fn check_expr(&mut self, cx: &LateContext<'tcx>, expr: &'tcx Expr<'tcx>) {
            let init = cx.expr_or_init(e);