swaits
f6f41eda35
Plain-data structs and the seeded Rng alias from spec §7. Each lives in its own file under src/core/ with unit tests: - Direction, Objective, ObjectiveSpace (with as_minimization negating only Maximize axes) - Evaluation (is_feasible == constraint_violation <= 0.0) - Candidate<D>, Population<D> (concrete, public fields, From<Vec<...>>) - OptimizationResult<D> - type Rng = rand::rngs::StdRng + rng_from_seed, so no public trait is generic over the RNG (spec §2.5) All public types behind #[cfg_attr(feature = "serde", derive(...))] so the optional feature wires up without changing the default surface.
39 lines
961 B
Rust
39 lines
961 B
Rust
//! Single seeded RNG type used throughout the crate.
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use rand::SeedableRng;
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/// The standard RNG used by `Initializer`, `Variation`, and built-in optimizers.
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///
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/// Fixed to a single concrete type so the public traits never need to be
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/// generic over the RNG.
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pub type Rng = rand::rngs::StdRng;
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/// Build a deterministic [`Rng`] from a 64-bit seed.
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pub fn rng_from_seed(seed: u64) -> Rng {
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Rng::seed_from_u64(seed)
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use rand::Rng as _;
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#[test]
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fn same_seed_same_sequence() {
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let mut a = rng_from_seed(42);
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let mut b = rng_from_seed(42);
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let av: u64 = a.random();
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let bv: u64 = b.random();
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assert_eq!(av, bv);
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}
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#[test]
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fn different_seed_different_sequence() {
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let mut a = rng_from_seed(1);
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let mut b = rng_from_seed(2);
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let av: u64 = a.random();
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let bv: u64 = b.random();
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assert_ne!(av, bv);
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}
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}
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