What do you assume when you see fromListN in a library?

Edward Kmett ekmett at gmail.com
Fri Feb 28 21:15:33 UTC 2020

I treat any use of a list of length other than N as an error.

On Thu, Feb 27, 2020 at 6:54 PM Carter Schonwald <carter.schonwald at gmail.com>

> Hey everyone:
> When you see fromListN as a function in a library, do you assume / presume
> it’s expecting an exactly N element list ? Or do you expect/tolerate other
> behavior ?
> Should it reject shorter lists?
> Should it truncate or reject longer lists?
> A corner case of this came up in some bug discussion I was having
> regarding vector,  and I shall claim and or presume that most folks assume
> exact size with prompt rejection of too long or too short.
> Thoughts please ?
> -Carter
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