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From: 18k11tm001@sneakemail.com (Russ)
Newsgroups: comp.lang.ada
Subject: Re: += in ada
Date: 17 Oct 2003 17:08:41 -0700
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Hyman Rosen <hyrosen@mail.com> wrote in message news:<1066400123.238640@master.nyc.kbcfp.com>...
> Robert I. Eachus wrote:
> > Which makes Ada better for most common CPUs today, right?
> 
> No, you are forgetting that these operators are intended to
> be defined for all sorts of types, where the temporaries may
> be very large data structures, such as matrices.
> 
> Anyway, I'm not an Ada programmer, so I don't really care if
> Ada has these operators or not. If I had to do stuff like this
> in Ada, I would just write the appropriate procedures and be
> done with it. In C++, I use these operators all the time. I
> just did a quick search through the source code we've added to
> out trading system and counted around 500 uses of augmented
> assignment operators (+=, -=, *=, /=), and yes, we actually do
> have a few cases of /=. We also have a few of those complicated
> left-hand sides that people talk about; here's one:
> 
>      (*fxMap)[exposure.secCurr.id().get_key()] += exposure.secExp;

Thanks for that little dose of reality. I hope it wakes up a few
people around here (but I doubt it will).

I am curious about one thing. In your count of augmented assignment
operators, did you count loop incrementors? I would imagine most of
those are "++" rather than the basic four you listed, so I will assume
(unless you tell me otherwise) that you did not count them. Also,
approximately how many lines of code did you look in to find the 500
occurrences?

By the way, I have always considered the standard C/C++ "for"
construct to be awkward, and I think the Ada looping style is
preferable. Then again, many C++ programmers are probablly now using
STL iterators in lieu of the old-style "++" idioms.