A small typing test program in Rust
| 1 | use std::time::{ |
| 2 | Duration, |
| 3 | Instant, |
| 4 | }; |
| 5 | |
| 6 | #[derive(Debug)] |
| 7 | pub struct Timer { |
| 8 | start: Option<Instant>, |
| 9 | duration: Duration, |
| 10 | } |
| 11 | |
| 12 | impl Timer { |
| 13 | pub fn new(duration: Duration) -> Self { |
| 14 | Self { |
| 15 | start: None, |
| 16 | duration, |
| 17 | } |
| 18 | } |
| 19 | |
| 20 | pub fn start(&mut self) { |
| 21 | self.start = Some(Instant::now()); |
| 22 | } |
| 23 | |
| 24 | pub fn remaining (&self) -> Duration { |
| 25 | self.duration.saturating_sub(self.elapsed()) |
| 26 | } |
| 27 | |
| 28 | pub fn elapsed (&self) -> Duration { |
| 29 | match self.start { |
| 30 | Some(time) => time.elapsed(), |
| 31 | None => Duration::ZERO, |
| 32 | } |
| 33 | } |
| 34 | } |