Re: [Haskell-beginners] Meaning of '!' in record defintion? UNPACK?

26 Feb 2009


      On 26 Feb 2009, at 12:07, Colin Paul Adams wrote:
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"Thomas" == Thomas Davie  writes:
Thomas> The {-# UNPACK #-} tells the compiler that it can unpack
   Thomas> the Int – meaning that a Position will be neatly packed
   Thomas> into 12 bytes.
What would be the difference if there was no UNPACK pragma?
The tag in the Ints would be included in the structure created, with  
UNPACK, they would not.

Bob