#15471: Polymorphism, typed splices and type inference don't mix -------------------------------------+------------------------------------- Reporter: mpickering | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: 8.8.1 Component: Template Haskell | Version: 8.4.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: GHC rejects | Unknown/Multiple valid program | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj): But that doesn't scale well {{{ foo2 :: Num a => a -> a foo2 x = x+1 test_foo2 :: ??? test_foo2 = [|| foo2 |]] }}} If you give it the type `test_foo2 :: forall a. Num a => Q (TExp (a->a))` then you'll need to decide what dictionary to pass to it when you invoke it in `$$(test_foo2)`. Only erasure is allowing MetaOCaml to squeeze by, and we don't have that luxury. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15471#comment:11 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler