"Strong typing vs. strong testing"

Chris Rebert clp2 at rebertia.com
Wed Sep 29 09:14:35 CEST 2010


On Tue, Sep 28, 2010 at 11:43 PM, rustom <rustompmody at gmail.com> wrote:
> On Sep 29, 5:32 am, Chris Rebert <c... at rebertia.com> wrote:
>> On Tue, Sep 28, 2010 at 2:55 AM, Malcolm McLean
>> <malcolm.mcle... at btinternet.com> wrote:
>> > On Sep 27, 9:29 pm, p... at informatimago.com (Pascal J. Bourguignon)
>> > wrote:
>> >> On the other hand, with the dynamic typing mindset, you might even wrap
>> >> your values (of whatever numerical type) in a symbolic expression
>> >> mentionning the unit and perhaps other meta data, so that when the other
>> >> module receives it, it may notice (dynamically) that two values are not
>> >> of the same unit, but if compatible, it could (dynamically) convert into
>> >> the expected unit.  Mission saved!
>>
>> > I'd like to design a language like this. If you add a quantity in
>> > inches to a quantity in centimetres you get a quantity in (say)
>> > metres. If you multiply them together you get an area, if you divide
>> > them you get a dimeionless scalar. If you divide a quantity in metres
>> > by a quantity in seconds you get a velocity, if you try to subtract
>> > them you get an error.
>>
>> Sounds just like Frink:
>> http://futureboy.us/frinkdocs/
>
> A currently developed language with units is curl: see
> http://developers.curl.com/userdocs/docs/en/dguide/quantities-basic.html

Frink's most recent version is only 17 days old. (You seemed to imply
Frink isn't under active development.)

Cheers,
Chris



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