[Haskell-beginners] what does (# a, s #) mean?

[Krzysztof Skrzętnicki]

It's the syntax for unboxed tuple. See:
http://www.haskell.org/ghc/docs/latest/html/users_guide/primitives.html#unboxed-tuples

<http://www.haskell.org/ghc/docs/latest/html/users_guide/primitives.html#unboxed-tuples>Best
regards,
Krzysztof Skrzętnicki

On Sun, Apr 10, 2011 at 19:29, Amitava Shee <amitava.shee at gmail.com> wrote:

> I came across this definition in ghc source
>
> $GHC/compiler/utils/State.hs
> =======================
> newtype State s a = State { runState' :: s -> (# a, s #) }
>
>
> What does the construct (# a, s #) mean?
>
> Thanks & Regards,
> Amitava Shee
>
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