[Haskell-cafe] Re: Type-level arithmetic
lennart at augustsson.net
Mon Oct 15 13:51:52 EDT 2007
And Haskell embedded a logical programming language on accident.
On 10/15/07, Manuel M T Chakravarty <chak at cse.unsw.edu.au> wrote:
> Dan Piponi wrote,
> > On 10/12/07, Brandon S. Allbery KF8NH <allbery at ece.cmu.edu> wrote:
> >> He wants to write entire programs in the type system,
> >> something like the crazies who write programs in C++ templates such
> >> that template expansion does all the work at compile time
> > Crazies? :-)
> > http://homepage.mac.com/sigfpe/Computing/peano.html
> > Having switched from C++ to Haskell (at least in my spare time) I
> > thought I'd escaped that kind of type hackery but it seems to be
> > following me...
> The way I see, we are trying to come up with a clean way of
> providing type-level computations (ie, we use and extend the
> standard theory of HM type systems). C++ embedded a functional
> language in the type systems mostly by accident, whereas we do it on
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> Haskell-Cafe at haskell.org
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