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

26 Feb 2009


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"Thomas" == Thomas Davie  writes:
Thomas> 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?
Thomas> The tag in the Ints would be included in the structure
    Thomas> created, with UNPACK, they would not.

What is the tag?
-- 
Colin Adams
Preston Lancashire