[Haskell-cafe] What ever happened to Haskell 98 as a "stable branch"?

Gen Zhang genneth at gmail.com
Mon Mar 26 06:45:54 EDT 2007

On Mon, 26 Mar 2007 09:20:59 +0100
Simon Peyton-Jones <simonpj at microsoft.com> wrote:

> | [Conjecture 1 (2007). Haskell Mathematical Prelude and
> Mathematicians] If | Haskell had a mathematically sound prelude then
> more mathematicians would | use Haskell.
> A mathematically sound Prelude would be great.  Go for it!

Unfortunately, we currently do not possess all the operations that
mathematicians like to perform when making up new structures. In
particular I can think of quotient types, which just causes a world of
pain when it comes to decently implementing them. Sometimes, you can
implement something that acts as that type (e.g. Set ~== List/Eq), but
sometimes it's just not possible (Monad Product -- I can't remember
what that paper was called now...)

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