Re: Ada83 equivalents for Ada95

[bbalfour@std.caci.com (Brad Balfour)]

In article <31A66DAA.7418@sud.ed.ray.com>, Joe Gwinn
<gwinn@sud.ed.ray.com> wrote:

>We have the Ada83 versus Ada95 problem as well.  In short, we plan to 
>use the Ada83 subset of Ada95, so that in some future, we will be able 
>to transition to Ada95, should the customer so desire.  
[snip]
>The Ada95 standard defines this Ada83 subset, by what it doesn't mention 
>as having been broken by Ada95.
>
>Joe Gwinn

You are looking for a report on the Upward Incompatibilities that Ada 95
has with respect to Ada 83. The short answer is that there are *very few*
upward incompatibilites. The long answer is that an exhaustive document
has been produced by Bill Taylor. It can be found at 
http://sw-eng.falls-church.va.us/AdaIC/docs/compat-guide/compat-guide6-0.txt

There are even tools available that you can purchase which will
automatically detect these problems in your Ada 83 code. May people have
found that just running the code through an Ada 95 compiler, such as GNAT,
will detect many (but not all) problems.

You may also want to reconsider using Ada 95 now. My organization has been
supporting Ada 95 projects for the past 18 months. We've found that Ada 95
can definitely be used for production projects to be delivered to the
field.

Brad
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