[![Rust](https://github.com/healeycodes/coolrule/actions/workflows/rust.yml/badge.svg)](https://github.com/healeycodes/coolrule/actions/workflows/rust.yml)

# coolrule

Boolean expression evaluation engine (a port of [boolrule](https://github.com/tailsdotcom/boolrule) to Rust).

```rust
// Without context
let expr = coolrule::new("1 in (1, 2, 3) or 2 > 3")?;
let test = expr.test()?; // true

// With context
let expr = coolrule::new("x ∉ (5, 6, 7)")?;
let test = expr.test_with_context(
    HashMap::from([(vec!["x"], Value::Number(8.0))])
)?; // true
```

The boolrule test suite has also been ported (and passes) see `lib.rs`.

Expressions are parsed via PEG parser combinators (powered by [pom](https://github.com/J-F-Liu/pom)).

It's around 3x faster than the Python version (before any kind of optimization work).

I'm still learning how to write idiomatic Rust so if you see anything strange please let me know!

## Tests

`cargo test`