[Haskell-cafe] APIs

ajb at spamcop.net ajb at spamcop.net
Tue May 24 20:32:48 EDT 2005

G'day all.

Quoting John Meacham <john at repetae.net>:

> I think it is easier just to declare it as Enum..
> data ParentsFlag = DontCreateParents | CreateParents
>         deriving(Enum)
> now (toEnum . fromEnum) will convert between ParentsFlag and Bool.

Except that it's still not clear whether True corresponds to CreateParents
or not.

I'd do it by providing functions with meaningful names, like this:

    createParentsIfTrue :: Bool -> ParentsFlag

Andrew Bromage

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