// Copyright 2020-2026 The Jujutsu Authors//// Licensed under the Apache License, Version 2.0 (the "License");// you may not use this file except in compliance with the License.// You may obtain a copy of the License at//// https://www.apache.org/licenses/LICENSE-2.0//// Unless required by applicable law or agreed to in writing, software// distributed under the License is distributed on an "AS IS" BASIS,// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.// See the License for the specific language governing permissions and// limitations under the License. use std::time::Duration; pub struct BackoffIterator {    next_sleep_secs: f32,    elapsed_secs: f32,} impl BackoffIterator {    #[cfg_attr(unix, expect(dead_code))]    pub fn new() -> Self {        Self {            next_sleep_secs: 0.001,            elapsed_secs: 0.0,        }    }} impl Iterator for BackoffIterator {    type Item = Duration;     fn next(&mut self) -> Option<Self::Item> {        if self.elapsed_secs >= 10.0 {            None        } else {            let current_sleep = self.next_sleep_secs * (rand::random::<f32>() + 0.5);            self.next_sleep_secs *= 1.5;            self.elapsed_secs += current_sleep;            Some(Duration::from_secs_f32(current_sleep))        }    }}