rust-rule-engine 1.20.1

A blazing-fast Rust rule engine with RETE algorithm, backward chaining inference, and GRL (Grule Rule Language) syntax. Features: forward/backward chaining, pattern matching, unification, O(1) rule indexing, TMS, expression evaluation, method calls, streaming with Redis state backend, watermarking, and custom functions. Production-ready for business rules, expert systems, real-time stream processing, and decision automation.
Documentation 
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rule "PurchaseRule1" salience 10 {
    when
        Order.Amount > 50.0
    then
        Log("Purchase over 50 detected");
}

rule "PurchaseVIP" salience 5 {
    when
        User.IsVIP == true
    then
        Log("VIP purchase");
}