#12708: RFC: Representation polymorphic Num -------------------------------------+------------------------------------- Reporter: Iceland_jack | Owner: Type: feature request | Status: new Priority: normal | Milestone: Component: Core Libraries | Version: 8.0.1 Resolution: | Keywords: | LevityPolymorphism Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by oerjan): * cc: oerjan (added) Comment: Replying to [comment:11 goldfire]:
Replying to [comment:3 Iceland_jack]:
Should this not be allowed when `minBound :: () -> a` is allowed?
Because `blah :: Int#` is not allowed? This would actually be OK, because methods -- even nullary ones, like `minBound` are actually functions that take dictionaries. So we're OK here.
The question is, how would you store the necessary `Int#` in the dictionary? It seems to me you'd have to use some kind of indirection because otherwise you have a dictionary field than can have arbitrary size. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12708#comment:25 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler