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From: dewar@merv.cs.nyu.edu (Robert Dewar)
Subject: Re: floating point problem
Date: 1997/03/15
Message-ID: <dewar.858456639@merv>#1/1
X-Deja-AN: 225840899
References: <5f0faa$6ok@mtinsc04.worldnet.att.net>
 <331ace4d.1427558395@news.mwci.net> <dewar.857535729@merv>
 <1997Mar5.083938.1@eisner> <dewar.857586895@merv> <1997Mar6.080211.1@eisner>
 <dewar.857911706@merv> <5fvqkr$7n7@mulga.cs.mu.OZ.AU> <dewar.857974200@merv>
 <1997Mar10.074953.1@eisner> <dewar.858142750@merv>
 <1997Mar12.095335.1@eisner> <dewar.858314207@merv>
 <1997Mar14.073448.1@eisner>
Organization: New York University
Newsgroups: comp.lang.ada
Date: 1997-03-15T00:00:00+00:00
List-Id: <comp.lang.ada>


Larry said

<<Of course I have called from Ada to other languages for other
purposes, but in this case (since I don't recall any test in the
RM) I was hoping some language-lawyer would say that exceptions
would surely be raised by some particular expression and thus I
could intercept the exception.  Naturally raising such exceptions
would not be a viable approach if some implementations never "got
that far".>>

Of course you cannot look in the RM to find out what an Ada compiler should
do when it is run in a configuration which it does not support. You might as
well try loading the Ada compiler into a washing machine and adding 
detergent, and then say -- well I knew it wouldn't run perfectly, but I
thought from the RM that some exception should be raised :-)

When you run GNAT on a machine with no floating-point and no floating-point
emulation, it is not quite as bad as putting it in a washing machine, but from
a formal point of view it is the same.

Who knows what happens? I never tried it, so I don't know, but you certainly
cannot look in the RM to see what happens. Mike must know what happens, since
he complains about his from time to time!