{"ast_node_type":"other","tokens":[{"end":78,"kind":"keyword","start":0,"text":"hir::ExprKind::Loop(_,"}]}
            hir::ExprKind::Loop(_, _, hir::LoopSource::While, _) => tail_expr,
        let loop_expr_in_tail = match expr.kind {
            hir::ExprKind::Loop(_, _, hir::LoopSource::ForLoop, _) => {