gust-stdlib 0.2.0

Standard library of reusable Gust state machines (circuit breaker, retry, saga, rate limiter, and more)
Documentation 
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machine RateLimiter<K> {
    state Available(tokens: i64, max_tokens: i64)
    state Exhausted(retry_after_ms: i64, max_tokens: i64)

    transition acquire: Available -> Available | Exhausted
    transition refill: Exhausted -> Available

    effect now_ms() -> i64

    on acquire() {
        if tokens > 0 {
            goto Available(tokens - 1, max_tokens);
        } else {
            goto Exhausted(perform now_ms(), max_tokens);
        }
    }

    on refill() {
        goto Available(max_tokens, max_tokens);
    }
}