Thanks for the suggestion guys, I think the sized vector is just what I needed!

I know about tuples but I can't use the usual list functions like map, splitAt etc, also there is no need to have more than one data type.

On 17 March 2015 at 18:35, Konstantine Rybnikov <k-bx@k-bx.com> wrote:

Hi Kelong!

Check out https://hackage.haskell.org/package/sized-vector-0.0.2.0/docs/Data-Vector-Sized.html for a vector which has its size stored in type itself.

Cheers.

On Tue, Mar 17, 2015 at 7:26 PM, Kelong Cong <kelongcong@gmail.com> wrote:
Hello,

I have a function that takes a list as its parameter. The list must always have the same length, for example 16. Instead of producing a "Nothing" or bottom out when an invalid list is supplied, are there ways to verify this at compile time? If not, are there alternative data types that has this kind of functionality?

Thanks,
Kelong

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