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From: "Alejandro R. Mosteo" <alejandro@mosteo.com>
Newsgroups: comp.lang.ada
Subject: Re: Community Input for the Maintenance and Revision of the Ada
 Programming Language
Date: Wed, 13 Sep 2017 15:07:45 +0200
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Xref: news.eternal-september.org comp.lang.ada:48102
Date: 2017-09-13T15:07:45+02:00
List-Id: <comp.lang.ada>

On 12/09/17 19:43, Jeffrey R. Carter wrote:
> On 09/12/2017 04:36 PM, Egil H H wrote:
>> On Tuesday, September 12, 2017 at 3:43:40 PM UTC+2, Dmitry A. Kazakov 
>> wrote:
>>> So it can do with the custom type:
>>>
>>> with Ada.Text_IO;  use Ada.Text_IO;
>>> procedure Test is
>>>      Max : constant := 1000;
>>>      subtype Max_Length is Natural range 0..Max;
>>>      type Bounded (Size : Max_Length := Max_Length'Last) is record
>>>         Length : Max_Length := 0;
>>>         Text   : String (1..Size);
>>>      end record;
>>>
>> ...
>>>      Y : Bounded (10);
>>
>> Also, allocating 1000 Characters for a string of max length 10 is 
>> hardly an optimal solution...
> 
> If an actual discriminant is provided, the default is not used. This 
> only allocates 10 characters.

Just going back to my basics, I think it's been years since I used 
default discriminants. In such a case, if I tried to later assign a 
larger instance to this Y, would it work, given that only 10 chars were 
allocated initially?

Thanks.