[Haskell-cafe] Type-level programming [The container problem]

[Andrew Coppin]

Aaron Denney wrote:
> On 2008-09-27, Andrew Coppin <andrewcoppin at btinternet.com> wrote:
>   
>>
>> Ah - so the "Prolog programs as type signatures" thing is *his* fault?! ;-)
>>     
>
> No, he merely takes advantage of it.

Heh. OK. ;-)

By the way... I've seen a lot of type-level programs that allow you to 
express (and therefore verify) some pretty extreme properties of your 
code. In other words, you can make the compiler do more checking than it 
normally would. But the actual compiled code (assuming it does indeed 
compile) works exactly the same way as before. Is there any way to use 
type-level programming to actually alter the behaviour of the program in 
a useful/interesting way?