/// <summary>
/// Makes sure that the observable is initialized against the shared state and any other objects along the tree.
/// </summary>
/// <typeparam name="T">The type to return.</typeparam>
/// <param name="sharedState">The shared state to attach to.</param>
/// <param name="initializerFunction">The initializer function.</param>
/// <returns>The observable you wannt.</returns>
public static T Observable <T>(this ISharedState sharedState, Func <T> initializerFunction)
{
if (sharedState is null)
{
throw new ArgumentNullException(nameof(sharedState));
}
if (initializerFunction is null)
{
throw new ArgumentNullException(nameof(initializerFunction));
}
try
{
SharedState.SetAsyncLocalState(sharedState);
var result = initializerFunction();
if (((IReactiveObject)result).SharedState != sharedState)
{
// shared state should have been assigned.
throw new ArgumentOutOfRangeException(nameof(initializerFunction));
}
return(result);
}
finally
{
SharedState.SetAsyncLocalState(null);
}
}
