Re: Half Constrained Array Types and Slices

[Martin Krischik <krischik@users.sourceforge.net>]

Larry Kilgallen wrote:

> In article <wccek1ky3nj.fsf@shell01.TheWorld.com>, Robert A Duff
> <bobduff@shell01.TheWorld.com> writes:
>> Kilgallen@SpamCop.net (Larry Kilgallen) writes:
>> 
>>> In article <qZuNf.2045$6I.1540@newsread3.news.pas.earthlink.net>,
>>> "Jeffrey R. Carter" <spam@spam.com> writes:
>>> 
>>> > In Ada we have constrained and unconstrained array types; I call this
>>> > a "half constrained" array type so we have names for all of them.
>>> > Since his language doesn't have box, I presume an unconstrained array
>>> > type would be:
>>> > 
>>> > type Unconstrained (Lo : Positive; Hi : Natural) is array (Lo .. Hi)
>>> > of Component;
>>> 
>>> That looks to me very much like Pascal.
>> 
>> Really?  I don't know any version of Pascal that allows anything like
>> that.
> 
> VAX/DEC/HP Pascal uses something like that not in a type declaration
> but in describing the type of a routine parameter.

Yep. It's an optional feature of ISO pascal. Not many pascal compiler
actually implemented it.

Martin
-- 
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