Re: [Haskell-cafe] Support of multi-constructor types by UNPACK pragma

FWIW, I posted a ticket: https://ghc.haskell.org/trac/ghc/ticket/9214 Together with the following issues it would make a lot of data structures lighter in terms of memory footprint: https://ghc.haskell.org/trac/ghc/ticket/7647 https://ghc.haskell.org/trac/ghc/ticket/3990