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From: Brian Drummond <brian@shapes.demon.co.uk>
Newsgroups: comp.lang.c++,comp.lang.ada
Subject: Re: Why use C++?
Date: Sun, 14 Aug 2011 11:01:40 +0000 (UTC)
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Date: 2011-08-14T11:01:40+00:00
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On Sat, 13 Aug 2011 14:12:51 +0100, Simon Wright wrote:

> Brian Drummond <brian@shapes.demon.co.uk> writes:
> 
>> Incidentally, the values of "lower" and "upper" need not be determined
>> until runtime. The compiler can infer the best base type from whatever
>> constraints it finds on "lower" and "upper".
> 
> I don't think that can be true? OK, the range can be postponed until
> runtime, but the base type of which the actual bounds are instances must
> be known (talking about a compiler here, not an interpreter).

Yes, that's what I meant by the constraints on the bounds ... the base 
type of the range must be wide enough to accommodate both bounds. I see 
no need to specify it; that's the compiler's job.

- Brian