Question about the notation of (# ... #)

[Hal Daume III]

This means its an unboxed tuple.  See recent thread about boxed
vs. unboxed.

--
Hal Daume III

 "Computer science is no more about computers    | hdaume@isi.edu
  than astronomy is about telescopes." -Dijkstra | www.isi.edu/~hdaume

On Fri, 4 Oct 2002, David Sabel wrote:

> Hi,
> 
> can somebody explain what the notation (# ... #)
> means?
> 
> For example it is used in the definition of unsafePerformIO:
> 
> unsafePerformIO :: IO a -> a
> unsafePerformIO (IO m) = case m realWorld# of (# _, r #)   -> r
> 
> Thanks, David
> 
> 
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