[Haskell-cafe] compilation succeeds -- execution fails
stefanor at cox.net
Sun Mar 30 02:00:30 EDT 2008
On Sat, Mar 29, 2008 at 10:21:32PM -0700, Jason Dusek wrote:
> Stefan O'Rear <stefanor at cox.net> wrote:
> > The only type that you are allowed to assume corresponds to a C int is
> > CInt, in the Foreign.C.Types module. This probably isn't the problem,
> > but it could make problems of its own on a 64-bit or otherwise weird
> > system.
> So say I turn everything back to pointers to CInt, what is the
> accepted way to convert from CInt to Int
Same as any other pair of whole-number types - fromIntegral.
> and CInt to Char?
fromIntegral and toEnum
> Is relying on the fact that CInt always wraps a Haskell integer an
> okay way to go?
What do you mean by wraps? It's an opaque type...
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