From: "Nick Roberts" <Nick.Roberts@dial.pipex.com>
Subject: Re: Alternate to Unchecked_Conversion - Portable?
Date: 1999/02/27
Date: 1999-02-27T00:00:00+00:00 [thread overview]
Message-ID: <7b8cva$ii5$2@plug.news.pipex.net> (raw)
In-Reply-To: m3pv6x2ybe.fsf@mheaney.ni.net
Matthew Heaney wrote in message ...
|"Nick Roberts" <Nick.Roberts@dial.pipex.com> writes:
|> robert_dewar@my-dejanews.com wrote in message
|> <7b3fk2$lnk$1@nnrp1.dejanews.com>...
|> [...]
|> | OO : TT renames UC (O);
|> Is this legal?
|
|Yes, because there is a subtle difference between what a function
|returns in Ada95 vs Ada83. Functions now return "constant objects,"
|whereas before, they returned "values."
Thanks Matt. There it is -- RM95 4.1 -- crystal clear.
And I defer to what Robert was saying about compiler optimisations. Nearly
all optimisations are delicate things: there are many, many ways of
potentially making correct output code go bad, often subtle and nasty ways;
it is indeed easy to look at a specific piece of source code and say "oh
well it ought to produce ... object code", but very, very hard to build in
so many special optimisations to a compiler that you can be sure it will
produce the best possible code in every circumstance!
I shall try :-)
-------------------------------------
Nick Roberts
-------------------------------------
next prev parent reply other threads:[~1999-02-27 0:00 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-02-21 0:00 Alternate to Unchecked_Conversion - Portable? Steve Doiel
1999-02-21 0:00 ` Steve Quinlan
1999-02-22 0:00 ` robert_dewar
1999-02-21 0:00 ` Matthew Heaney
1999-02-22 0:00 ` Christopher Green
1999-02-23 0:00 ` Matthew Heaney
1999-02-23 0:00 ` Samuel Mize
1999-02-24 0:00 ` robert_dewar
1999-02-25 0:00 ` Nick Roberts
1999-02-25 0:00 ` robert_dewar
1999-02-26 0:00 ` Nick Roberts
1999-02-26 0:00 ` Matthew Heaney
1999-02-27 0:00 ` Nick Roberts [this message]
1999-02-24 0:00 ` robert_dewar
1999-02-23 0:00 ` Christopher Green
1999-02-25 0:00 ` robert_dewar
1999-02-24 0:00 ` Christopher Green
1999-02-25 0:00 ` robert_dewar
1999-02-25 0:00 ` dennison
1999-02-25 0:00 ` Christopher Green
1999-02-26 0:00 ` Tom Moran
1999-02-26 0:00 ` robert_dewar
1999-02-26 0:00 ` robert_dewar
1999-02-26 0:00 ` Christopher Green
1999-03-01 0:00 ` Nick Roberts
1999-03-01 0:00 ` dewar
1999-03-01 0:00 ` Nick Roberts
1999-02-26 0:00 ` Robert A Duff
1999-02-28 0:00 ` robert_dewar
1999-02-23 0:00 ` Christopher Green
1999-02-25 0:00 ` robert_dewar
1999-02-24 0:00 ` Christopher Green
1999-02-25 0:00 ` robert_dewar
1999-02-26 0:00 ` Dale Stanbrough
1999-02-26 0:00 ` Robert A Duff
1999-02-22 0:00 ` robert_dewar
1999-02-22 0:00 ` Samuel Mize
1999-02-22 0:00 ` Tom Moran
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