qubit-cas 0.4.2

Typed compare-and-swap executor with retry-aware conflict handling
Documentation 
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/*******************************************************************************
 *
 *    Copyright (c) 2025 - 2026 Haixing Hu.
 *
 *    SPDX-License-Identifier: Apache-2.0
 *
 *    Licensed under the Apache License, Version 2.0.
 *
 ******************************************************************************/

/// Terminal outcome captured in a CAS execution report.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum CasExecutionOutcome {
    /// The flow completed by installing a new state.
    SuccessUpdated,
    /// The flow completed successfully without writing.
    SuccessFinished,
    /// The flow aborted because business logic requested an abort.
    ErrorAbort,
    /// Retry limits were exhausted by compare-and-swap conflicts.
    ErrorConflictExhausted,
    /// Retry limits were exhausted by retryable business failures.
    ErrorRetryExhausted,
    /// The flow stopped because an async attempt timed out.
    ErrorAttemptTimeout,
    /// The cumulative user operation elapsed-time budget was exceeded.
    ErrorMaxOperationElapsedExceeded,
    /// The monotonic total retry-flow elapsed-time budget was exceeded.
    ErrorMaxTotalElapsedExceeded,
}