>>>>> "Lennart" == Lennart Augustsson <[EMAIL PROTECTED]> writes:
Lennart> "Ch. A. Herrmann" wrote: >> (1) What is the justification for the types "Float" and "Double" >> to be members of the type class "Enum"? This might induce >> students to use floating point values as counters in arithmetic >> sequences. Lennart> And what's wrong with that? If the students are using are Lennart> using values like 0.1 and expecting it to be represented Lennart> exactly then they should have some lectures about floating Lennart> point arithmetic. The point is that students might use the fact that Float and Double are in type class Enum as a justification to use it in practice, e.g., to avoid an Int->Float conversion. Maybe one can even prove that approximation errors will not harm in a particular situation. The question is whether a language should impose a style that protects programmers from taking such risks, and Haskell is a language that uses to follow this direction. Lennart> I've heard your complaint before, but I Lennart> can't really understand why removing Float and Double Removing them would possibly cause problems with existing programs and this is definitely not my aim. However, it'll make sense to think about long-term improvements. I wouldn't call Float and Double enumeration types. Maybe, a just misunderstood what Enum means. Cheers Christoph _______________________________________________ Haskell mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell