yesodweb/persistent — comment on commit 44c6843376da0fa959408c2380b43d3d17770c88
File:  line 0
By snoyberg:

Those sound like completely orthogonal features to me, though to be honest I still don't understand what the `^` syntax gives. I'm in favor of the `[Type]` addition, but don't really like `{Type}`.