qubit-fs 0.2.0

Provider-neutral synchronous and asynchronous filesystem abstraction 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.
// =============================================================================
// facade tests.
//! Observable lifecycle state for an owning asynchronous copy operation.

use crate::copy::CopyFailureState;

/// Stable lifecycle state for [`crate::copy::AsyncCopyOperation`].
///
/// # Examples
///
/// ```rust
/// use qubit_fs::copy::AsyncCopyOperationState;
///
/// assert!(matches!(AsyncCopyOperationState::Ready, AsyncCopyOperationState::Ready));
/// ```
#[derive(Clone, Copy, Debug, Eq, PartialEq)]
pub enum AsyncCopyOperationState {
    /// The operation passed synchronous preflight and has not been polled.
    Ready,
    /// Provider I/O may be in progress.
    Running,
    /// A copy outcome was returned successfully.
    Completed,
    /// The operation failed with its confirmed publication state.
    Failed(
        /// Confirmed destination publication state at failure time.
        CopyFailureState,
    ),
}