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use std::time::{Duration, Instant, SystemTime}; enum StopwatchState { Running, Paused, } pub struct Stopwatch { state: StopwatchState, duration: Duration, instant: Instant, } impl Stopwatch { pub fn new() -> Self { Self::default() } pub fn elapsed(&self) -> Duration { match self.state { StopwatchState::Running => { self.duration + self.instant.elapsed() }, StopwatchState::Paused => { self.duration }, } } pub fn restart(&mut self) { self.duration = Duration::new(0, 0); self.instant = Instant::now(); self.state = StopwatchState::Running; } pub fn pause(&mut self) { self.duration += self.instant.elapsed(); self.state = StopwatchState::Paused; } pub fn unpause(&mut self) { self.instant = Instant::now(); self.state = StopwatchState::Running; } } impl Default for Stopwatch { fn default() -> Self { Self { state: StopwatchState::Running, duration: Duration::new(0, 0), instant: Instant::now(), } } } pub struct SystemStopwatch { state: StopwatchState, duration: Duration, instant: SystemTime, } impl SystemStopwatch { pub fn new() -> Self { Self::default() } pub fn elapsed(&self) -> Duration { match self.state { StopwatchState::Running => { self.duration + self.instant.elapsed().unwrap() }, StopwatchState::Paused => { self.duration }, } } pub fn restart(&mut self) { self.duration = Duration::new(0, 0); self.instant = SystemTime::now(); self.state = StopwatchState::Running; } pub fn pause(&mut self) { self.duration += self.instant.elapsed().unwrap(); self.state = StopwatchState::Paused; } pub fn unpause(&mut self) { self.instant = SystemTime::now(); self.state = StopwatchState::Running; } } impl Default for SystemStopwatch { fn default() -> Self { Self { state: StopwatchState::Running, duration: Duration::new(0, 0), instant: SystemTime::now(), } } }