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comp.lang.haskell |
Mark T.B. Carroll <Mark.Carr...@aetion.com> wrote: >> I would expect >> reads "1.2" :: [(Int,String)] >> to be evaluated to >> [(1,".2")] >> but using Hugs (Version Sep 2006) it is just >> [] >> Bug or feature? AFAIK the report doesn't specify exactly how to parse a number, so I - Dirk
> Frank Poettgen <Frank.Poett...@Post.RxWyTxH-AyAzCyHzEyN.de> writes: The reason at least in GHC is that all numeric instances use the same
> Good question. GHCi, version 6.8.2, agrees with Hugs.
function to parse the string. The string is then converted, unless
conversion fails. Because of that, one also gets e.g.
> reads "1e2" :: [(Int,String)] [(100,"")]
strongly suspect "feature". But I never noticed that before, too.