#12605: UnboxedSums causes parse error on hash operator e.g. `let (#) = (+)` -------------------------------------+------------------------------------- Reporter: jberryman | Owner: Type: bug | Status: closed Priority: normal | Milestone: Component: Compiler | Version: 8.1 Resolution: invalid | Keywords: 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 rwbarton): * status: new => closed * resolution: => invalid Comment: Presumably you won't need to enable any language extensions in order to take advantage of optimizations that use unboxed sums. There are already important optimizations that introduce unboxed tuples, and they don't require a language extension. These language extensions just allow you to write unboxed sums/tuples in the surface syntax. I guess I'll close this ticket since I don't think we should do anything here, though I don't feel too strongly about it. By the way, the workaround for the original issue is to add a space before `#.`. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12605#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler