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using System;
using System.Collections;
namespace Unity.Services.Core.Internal
{
/// <summary>
/// Contract for an asynchronous operation with no result.
/// </summary>
interface IAsyncOperation : IEnumerator
{
/// <summary>
/// If true, this operation either succeeded, failed, or has been canceled.
/// </summary>
bool IsDone { get; }
/// <summary>
/// The current status of this operation.
/// </summary>
AsyncOperationStatus Status { get; }
/// <summary>
/// Event raised when the operation succeeded or failed.
/// The argument is the operation that raised the event.
/// </summary>
event Action<IAsyncOperation> Completed;
/// <summary>
/// The exception that occured during the operation if it failed.
/// </summary>
Exception Exception { get; }
}
/// <summary>
/// Contract for an asynchronous operation returning a result.
/// </summary>
/// <typeparam name="T">
/// The result's type of this operation.
/// </typeparam>
interface IAsyncOperation<out T> : IEnumerator
{
/// <inheritdoc cref="IAsyncOperation.IsDone"/>
bool IsDone { get; }
/// <inheritdoc cref="IAsyncOperation.Status"/>
AsyncOperationStatus Status { get; }
/// <summary>
/// Event raised when the operation succeeded or failed.
/// The argument is the operation that raised the event.
/// </summary>
event Action<IAsyncOperation<T>> Completed;
/// <inheritdoc cref="IAsyncOperation.Exception"/>
Exception Exception { get; }
/// <summary>
/// The result of this operation.
/// </summary>
T Result { get; }
}
}