I agree that the wording in that section is a bit vague (it uses the
#12047: Users Guide: GeneralizedNewtypeDeriving derives “instance Num Int => Num Dollars” -------------------------------------+------------------------------------- Reporter: Iceland_jack | Owner: Type: task | Status: new Priority: normal | Milestone: Component: Documentation | Version: 7.10.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Documentation | Unknown/Multiple bug | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj): phrase "Notationally" without going into much detail about what it really entails) and could stand to be clarified. Agreed. Patch welcome! Simon -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12047#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler