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Date: Sat, 26 Mar 2016 14:51:07 -0700 (PDT)
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Xref: news.eternal-september.org comp.lang.ada:29903
Date: 2016-03-26T14:51:07-07:00
List-Id: <comp.lang.ada>

> Is there a reason why not to use (Natural range <>)?

It seems like a simple question, but digging through my mind, I dug out why=
.

I have plans for this type, and all my plans involve indexes from 1 to n.  =
Someone else may have different plans, but that is their choice.  In my cas=
e though, I expect to do lots of arithmetic to arrive at the correct index.=
  Is it possible that some intermediate will have a zero or negative value?=
  Sure.  Should an Ada compiler try to do that gotcha range check?  No.  Bu=
t if at some point there is a parameter or function return that should not =
be range checked, this works.

More, this tells the user of the package that any range checking will be bo=
unds checking for a particular object.