use-simulation

Composable primitive simulation utilities for Rust.

use-simulation is part of RustUse, alongside sibling repositories such as use-math, use-stats, use-optimization, use-color, use-text, use-time, and use-units. It groups small, focused crates for state stepping, deterministic simulation clocks, repeatable seeds, Monte Carlo helpers, random walks, event-driven simulation, and reusable simulation results.

The RustUse approach in this workspace stays intentionally narrow:

• crates stay small and independently useful
• APIs stay explicit, documented, tested, and composable
• implementations favor practical f64 and usize helpers over framework-style abstractions
• dependencies stay minimal so each crate is easy to audit and adopt

Workspace crates

• use-simulation: thin facade crate that reexports the full simulation workspace
• use-state-step: explicit state transition helpers over f64
• use-simulation-clock: deterministic tick and elapsed-time helpers
• use-seed: repeatable seed utilities and simple deterministic sampling
• use-monte-carlo: small Monte Carlo mean and variance helpers
• use-random-walk: repeatable one-dimensional random walk helpers
• use-event-simulation: simple event scheduling and event-state application
• use-simulation-result: reusable summaries for finite simulation series

Facade crate

If you want one dependency for the whole workspace, use use-simulation. It reexports each focused crate and exposes the focused APIs directly so this works:

use use_simulation::*;

let seed = SimulationSeed::new(7);
let path = random_walk(RandomWalkConfig {
    start: 0.0,
    step_size: 1.0,
    steps: 4,
    seed,
})
.unwrap();
let summary = summarize(&path).unwrap();

assert_eq!(summary.steps, 4);
assert_eq!(summary.final_value, *path.last().unwrap());

Status

This workspace is experimental while it remains below 0.3.0. Expect the public API to stay small and practical, but still evolve as the RustUse simulation surface becomes clearer.

Development

Run the standard workspace checks from the repository root:

cargo fmt --all -- --check
cargo clippy --workspace --all-targets -- -D warnings
cargo test --workspace
cargo doc --workspace --no-deps