v0.1.0 — Initial Release

seuil v0.1.0

A complete, safe JSONata implementation in Rust — JSON query, transform, and expression evaluation.

Highlights

• 99.6% JSONata spec compliance — 1,027 of 1,031 official test cases pass
• Zero unsafe code — #![forbid(unsafe_code)] enforced
• 47 built-in functions — strings, math, arrays, objects, HOFs, date/time, regex
• Compile once, evaluate many — Seuil::compile("expr").evaluate(&json)
• Arena allocation via bumpalo for cache-friendly evaluation
• Deterministic simulation testing via injectable Environment trait

Quick Start

[dependencies]
seuil = "0.1"
serde_json = "1"

use seuil::Seuil;

let expr = Seuil::compile("orders[status='paid'].amount ~> $sum()")?;
let data = serde_json::json!({
    "orders": [
        {"status": "paid", "amount": 100},
        {"status": "pending", "amount": 50},
        {"status": "paid", "amount": 200}
    ]
});
let result = expr.evaluate(&data)?;
assert_eq!(result, serde_json::json!(300.0));

Testing Rigor

• VOPR campaigns: 10,000+ seeds, zero panics
• Chaos testing: 9 fault injection categories
• Property-based: ~14,000 generated cases via proptest
• Fuzzing: libfuzzer with corpus and dictionary
• CI: GitHub Actions on every push, nightly fuzzing and VOPR

Full Changelog

See CHANGELOG.md