rust-rule-engine 1.0.2-alpha

A high-performance rule engine for Rust with RETE-UL algorithm (2-24x faster), CLIPS-inspired features (Template System, Defglobal, Deffacts, Test CE, Conflict Resolution), Parallel Execution
Documentation 
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// Advanced rules with nested conditions and multiple operators

rule "Premium Customer Benefits" salience 20 {
    when
        ((user.vipLevel >= 5) && (user.totalSpent > 10000)) || 
        ((user.membershipYears >= 3) && (user.loyaltyPoints > 5000))
    then
        apply_discount(25);
        set(user.freeShipping, true);
        add_loyalty_points(500);
}

rule "Holiday Season Special" salience 15 {
    when
        ((date.month == 12) && (date.day >= 20)) && 
        ((order.amount > 200) || (user.hasGiftCard == true))
    then
        apply_discount(15);
        set(order.giftWrap, true);
        log("Holiday special applied");
}

rule "Flash Sale Eligibility" salience 12 {
    when
        (product.category == "electronics") && 
        ((user.notificationPrefs == "all") || (user.notificationPrefs == "sales")) &&
        (product.stock > 10)
    then
        send_notification("flash_sale");
        set(product.flashSaleEligible, true);
}