public static object GetResult(this Task task)
{
var taskType = task.GetType();
if (ReferenceEquals(taskType, typeof(Task)))
{
return(null);
}
else if (
(taskType.IsGenericType() && taskType.GetGenericTypeDefinition() == typeof(Task <>)) ||
AsyncStateMachineBoxAccessor.IsAsyncStateMachineBox(taskType) ||
(taskType.BaseType.IsGenericType() && taskType.BaseType.GetGenericTypeDefinition() == typeof(Task <>)))
{
#warning pre-compile accessor for Task.GetResult
var pi = taskType.GetProperty(nameof(Task <object> .Result));
var result = pi.GetValue(task);
if (result != null && result.GetType() == VoidTaskResultType)
{
return(null);
}
return(result);
}
else
{
throw new Exception($"Unknown Task type '{taskType}'.");
}
}
public static Type GetTaskResultType(Type taskType)
{
if (ReferenceEquals(taskType, typeof(Task)))
{
return(VoidTaskResultType);
}
else if (taskType.IsGenericType() && taskType.GetGenericTypeDefinition() == typeof(Task <>) ||
AsyncStateMachineBoxAccessor.IsAsyncStateMachineBox(taskType))
{
return(taskType.GetGenericArguments()[0]);
}
#warning temporary quick-fix. Still needed? WhenAllPromise : Task<VoidTaskResult>
else if (taskType.FullName == "System.Threading.Tasks.Task+WhenAllPromise")
{
return(VoidTaskResultType);
}
#warning temporary quick-fix. Still needed? WhenAllPromise<T> : Task<T[]>
else if (taskType.IsGenericType() && taskType.GetGenericTypeDefinition().FullName == "System.Threading.Tasks.Task+WhenAllPromise`1")
{
var elementType = taskType.GetGenericArguments()[0];
return(elementType.MakeArrayType());
}
#warning temporary quick-fix. Still needed? DelayPromise : Task<VoidTaskResult>
else if (taskType.FullName == "System.Threading.Tasks.Task+DelayPromise")
{
return(VoidTaskResultType);
}
else
{
throw new Exception($"Failed to match type [{taskType}] as a known 'Task' type.");
}
}