qubit-event-bus 0.6.3

A lightweight, thread-safe in-process event bus for Rust
Documentation 
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/*******************************************************************************
 *
 *    Copyright (c) 2026 Haixing Hu.
 *
 *    SPDX-License-Identifier: Apache-2.0
 *
 *    Licensed under the Apache License, Version 2.0.
 *
 ******************************************************************************/
//! Message acknowledgement modes.

/// Controls how subscriber handlers acknowledge event processing.
#[derive(Debug, Clone, Copy, Default, Eq, PartialEq, Hash)]
pub enum AckMode {
    /// A handler success automatically acknowledges the event.
    #[default]
    Auto,
    /// Handler code receives an [`crate::Acknowledgement`] and controls ACK/NACK.
    Manual,
}