Re: [Haskell-cafe] Hugs vs. GHCi

http://haskell.org/onlinereport/exps.html#sect3.12 "Pattern bindings are matched lazily; an implicit ~ makes these patterns irrefutable. For example, let (x,y) = undefined in e does not cause an execution-time error until x or y is evaluated." So GHCi is correct. Dan Vladimir Reshetnikov wrote:

Hi,

The following expression evaluates to 1 in GHCi, but results in an error in Hugs:

let f x = let g y = [x,y] in (g 1, g []) in 1

What is the correct behavior?

Thanks Vladimir _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe