Re: some questions re. Ada/GNAT from a C++/GCC user

[leschkes@ferret.cig.mot.com (Scott Leschke)]

bobduff@world.std.com (Robert A Duff) writes:

>In article <4jmuj5$lkh@dayuc.dayton.saic.com>,
>John G. Volan  <John_Volan@ccmail.dayton.saic.com> wrote:

[bunch of stuff deleted...]

>>I assume that the only thing that would make sense would be to treat
>>every structured statement as the moral equivalent of a begin/end.

>You assume right.  That is, we're arguing about syntactic sugar; the
>semantics doesn't change if you allow declare-begin-end to be left out.

Which implies that any of these constructs could have an exception
handler region.  I've often thought that this might be nice thing
to allow in the case of loop constructs.  Syntactically I'm not sure
I'd like it for some of the other constructs like if-elsif-else or
case statements.

I find the following, er... unappealing to say the least although maybe
it's just my anal sense of style (BTW, I initially tried justifying
the exception keyword with the if-elsif-else stuff but that looked worse
IMHO :-)

if ConditionA then
      DoA;
   exception
      when ExceptionA =>

         ReportError ("A");
elsif ConditionB then
   DoB;
   exception
      when ExceptionB =>

         ReportError ("A");
else
   DoC;
   exception
      when ExceptionC =>

         ReportError ("A");
endif;


Ultimately, it would probably make little difference either way.
-- 
Scott Leschke.........................email: leschkes@cig.mot.com
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