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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: What would you like in Ada202X?
Date: Sun, 1 Jul 2012 14:46:53 +0200
Organization: cbb software GmbH
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Date: 2012-07-01T14:46:53+02:00
List-Id: <comp.lang.ada>

On Sun, 1 Jul 2012 10:57:44 +0000 (UTC), Brian Drummond wrote:

> On Sun, 01 Jul 2012 10:25:07 +0200, Dmitry A. Kazakov wrote:
> 
>> On Sat, 30 Jun 2012 21:06:15 +0000 (UTC), Brian Drummond wrote:
>> 
>>> On Sat, 30 Jun 2012 20:43:17 +0200, Dmitry A. Kazakov wrote:
>>> 
>>>> On Sat, 30 Jun 2012 17:00:46 +0000 (UTC), Brian Drummond wrote:
>>>> 
>>>>> On Sat, 30 Jun 2012 14:34:10 +0200, Dmitry A. Kazakov wrote:
>>>> 
>>>>>> Code review and maintainability problems. The set of symbols cannot
>>>>>> be infinite.
>>>>> 
>>>>> Practical considerations surely restrict the length of additional
>>>>> operators, but I'm not sure that restriction belongs in the syntax.
>>>> 
>>>> I didn't meant length. I think that the number of operators should be
>>>> small to be memorizable. All symbols should be predefined, e.g. from
>>>> the Unicode page.
>>> 
>>> A symbol is not necessarily a single character;  "<="  already isn't.
>> 
>> This is an ASCII artefact. With Unicode adopted, there is no need in
>> such tricks. BTW, less-that-or-equal is one character: U+2264.
> 
> But until ASCII and/or Latin-1 are fully obsoleted, it is an artefact 
> that must be supported. Therefore there are operators that are more than 
> one character.

But no new ones, except for "in", "not in", "and then", "or else" which
must become true operators.

>>> And restricting the sequence length necessarily restricts the number of
>>> possible identifiers, so I'm not clear what you are suggesting.
> ...
>> That is. No user-defined sequences.
> 
> But an extended set of built-in symbols for operators, only supported 
> where full Unicode is available?

Yes.

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de