#12514: Can't write unboxed sum type constructors in prefix form -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.1 (Parser) | Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: None/Unknown Unknown/Multiple | Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- You can write `(# Int | Char #)`, but not `(# | #) Int Char`. This is annoying since it prevents you from partially applying unboxed sum type constructors, and it also precludes you from doing cool things like `reify ''(#||#)` (as I woefully noted [https://phabricator.haskell.org/D2448 here]). Luckily, I don't think fixing this would be too hard. The special case of parsing unboxed tuple type constructors as prefix is handled [http://git.haskell.org/ghc.git/blob/0d3bf62092de83375025edca6f7242812338542d... here], so I //think// we'd just need to add a similar case for unboxed sums. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12514 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler