[m-rev.] for review: document failrue conditions for list.split/4

[Peter Wang]

On Thu, 2 Jun 2016 12:06:38 +1000 (AEST), Julien Fischer <jfischer at opturion.com> wrote:
> 
> For review by anyone.
> 
> I would also be intrested in feedback whether the current behaviour
> of list.{drop,take} when their first argument is negative is intended.

I think the behaviour is okay, and consistent with at least the indexing
predicates in the list module.

BTW, index0 and member_index0 will traverse the entire list for a
negative index, if anyone cares.

> 
> -----------------
> 
> Document failure conditions for list.split/4.
> 
> Improve test coverage of list.split_list, list.drop and list.take.
> 
> library/list.m:
>      Document the failure conditions for split_list/4.
> 
>      Document that det_split_list/4 will also throw an exception for N < 0.
> 
> tests/hard_coded/split_list.{m,exp}:
>      Test for list.split_list/4.
> 
> tests/hard_coded/take_and_drop.m:
>      Ditto for list.take/3 and list.drop/3.
> 
> tests/hard_coded/Mmakefile:
>      Add the new tests.

That's fine.

Peter