21 Oct
2003
21 Oct
'03
6:37 p.m.
My preference would be for succ (+-0) to return the smallest positive real, since then you could define succ x to be the unique y with x < y and forall z . z < y => not (x < z), where such a y exists, and I'm not sure if the Haskell standard knows about signed zeros.
Is this really useful? Why would you need this number? Peano artithmetic on reals? :-)
Is there any way to do this (yet)? I found a case where I really need: f :: Float -> Float where f x is the least y such that x < y even if i have to FFI to C, I'd really like a solution. any help would be appreciated. - Hal