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From: Robert A Duff <bobduff@shell01.TheWorld.com>
Subject: Re: Look what I caught! was re:Ada paper critic
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Date: Wed, 19 Jun 2002 19:31:04 GMT
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Date: 2002-06-19T19:31:04+00:00
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"Frank J. Lhota" <NOSPAM.lhota.adarose@verizon.net> writes:

> Also, the standard only requires a valid pointer to the point just after the
> end of an array; no similar rule applies to the beginning of the array. For
> example, if you declare
> 
>     PLANET *before_mercury = solar_system - 1;
> 
> then the standard does NOT require that before_mercury compare meaningfully
> with the addresses of the solar_system elements.

Really?  I thought the above was OK.  The STL of C++ depends heavily on
this idiom.  Is this a difference between C and C++?  If so, what's the
rationale (in C)?

- Bob