The main blocker is specialization as it's being used in several places including parquet and arrow crate. As this feature is unlikely to be stabilized, we'll need to replace it with something else but so far it is challenging.
Thanks for clarifying that the plan is to stop relying on it :) Is there a specific place/issue/ticket to discuss this? If time allows, I would be interested in helping out.
tomhoule|5 years ago
lordsunland|5 years ago