gosh_core/
random.rs

1// [[file:../gosh-core.note::a722eec4][a722eec4]]
2use gut::prelude::*;
3
4pub use rand::prelude::*;
5
6/// Simulation with a fixed seed to get reproducible results.
7pub fn rng_with_seed(seed: impl Into<Option<u64>>) -> StdRng {
8    let seed = seed.into().unwrap_or_else(|| {
9        let value = gut::utils::unix_timestamp();
10        info!("gosh: the random process can be repeated with seed {value}");
11        value
12    });
13    StdRng::seed_from_u64(seed)
14}
15
16#[cfg(test)]
17mod test {
18    #[test]
19    fn test_rng() {
20        use crate::random::*;
21
22        let mut rng = rng_with_seed(None);
23        rng.gen::<i32>();
24        assert_eq!(rng.gen_range(0..1), 0);
25    }
26}
27// a722eec4 ends here
gosh_core/random.rs

gosh_core/
random.rs
