[Haskell-cafe] Int vs Integer

[Benjamin Franksen]

On Monday 19 December 2005 11:26, Wolfgang Jeltsch wrote:
> Am Montag, 19. Dezember 2005 01:10 schrieb Jared Updike:
> > Int is for bounded values -2**32 to 2**32 (I think... maybe 2**-31
> > and 2**31 or less if it's boxed?) based on the underlying machine
> > representation.
>
> Not really true.  As far as I remember, the Haskell Report just says
> that Int covers at least the integers from -2^27 to 2^27 - 1.  The
> range for Int can be higher than the range just given.  For 32-bit
> machines it will probably be -2^31 to 2^31 - 1 but there's no
> guarantee for that.

http://www.haskell.org/onlinelibrary/basic.html

6.4  Numbers

...
The finite-precision integer type Int covers at least the range [ - 
2^29, 2^29 - 1]. As Int is an instance of the Bounded class, maxBound 
and minBound can be used to determine the exact Int range defined by an 
implementation. ...

Ben