22 Nov
2012
22 Nov
'12
4:55 p.m.
Hi there, I have a design issue, which is causing me to generate orphan instances. I'm writing a small program which persists data to a database. In order to be able to switch between different backends, I have a Store typeclass in one module, which is exposed to the frontend, and which has instances in each backend module. But obviously, the backend instances are therefore orphan. Is there a better solution which would let me keep the concrete implementation separate from the interface? Thanks, Emm