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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