Re: Gengetopt 2.21 enhancement suggestions

Andre Noll wrote:
> On 17:35, Lorenzo Bettini wrote:
> 
>>>> of course range makes sense only for integers right?
>>> It would also make sense for floats. And it would be nice to also have
>>> "infinite" intervals, i.e. something like "int range=0.." meaning
>>> the given integer value must not be negative.
>>>
>> anyway, only for numerical values, right?
> 
> <mathematician hat on> For all type of options such that the
> underlying set carries a canonical partial order <mathematician
> hat off>.
> 

:-D

> This includes strings as well:
> 
> 	string range="bar..baz"
> 
> means that the given string must be between "bar" and "baz" in
> the lexicographical order.
> 
> Note that the "right" lexicographical order depends on the current
> locale which is probably a bit strange. As a locale-independent
> variant, one could use
> 
> 	strcmp("bar", arg) <= 0 && strcmp(arg, "baz") <= 0
> 
> to test whether arg is valid.
> 
> However, I'm not sure at all if the range thing is really useful for
> non-numerical values.

well, since it is to be implemented, probably it's better to implement 
it for all types...

-- 
Lorenzo Bettini, PhD in Computer Science, DSI, Univ. di Firenze
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