[Haskell-cafe] Converting CTime -> Int

Sven Panne sven.panne at aedion.de
Sun Aug 26 07:34:41 EDT 2007

[ Sorry for the *extremely* slow response, but I'm currently working through 
my backlog of >6000 mails... :-P ]

On Wednesday 16 May 2007 09:35, Tomasz Zielonka wrote:
> I wonder why CTime is not Integral - maybe there is no such guarantee
> for time_t? If so, then you shouldn't rely on Enum. The safest bet seems
> to be toRational - CTime is Real.

The Single Unix Specification has the answer:


   "time_t and clock_t shall be integer or real-floating types."

CTime's Enum instance is as debatable as the ones for Float and Double, but 
for consistency reasons we included it in the FFI spec.


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