On Tue, Oct 22, 2002 at 04:04:26AM -0700, nordin@glass.cse.ogi.edu wrote:

nordin 2002/10/22 04:04:25 PDT

Modified files: libraries/Hugs Prelude.hs Log: Add explicit enumFromTo and enumFromThenTo for Ratio. From Ferenc Wagner.

Maybe it would be better to copy this out of the derived Report, except maybe for the additional strictness. But anyway its usefulness is limited until Hugs implements floating point literals in the H98 way. For example, consider the following expression (from the test suite): [-10.0,-9.9..10.0 :: Ratio Int] In Haskell 98, this is the same as [-10%1,-99%10..10%1 :: Ratio Int] but in Hugs we get [-10 % 1,-5190451 % 524288 Program error: Ratio.%: zero denominator because (-5190451 % 524288) + (52429 % 524288::Ratio Int) overflows. (With Integer it doesn't, but the fractions are silly.)