On Sun, Feb 28, 2010 at 1:39 AM, Greg Ewing <greg.ewing at canterbury.ac.nz> wrote: > Meador Inge wrote: > >> Even with the user-defined precision capabilities of the 'Decimal' class? >> In other words, can I create an instance of a 'Decimal' that behaves (in >> all operations: arithmetic, comparison, etc...) exactly as the extended >> double precision type offered by a given machine? > > It's not precision that's the issue, it's that the number > base is different. That affects which numbers can > be represented exactly, and how results that can't be > represented exactly are rounded. > > I would be very surprised if there is a way of configuring > the Decimal type so that it gives identical results to that > of any IEEE binary floating point type, including rounding > behaviour, denormalisation, etc. I'd be astonished. :) Mark
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