zero-sized constants?

[Toon Moene]

N.M. Maclaren wrote:

> One common trick is to use separate zero-length constants as indicators
> of different entities, in cases where you aren't really interested in
> the value but only that they are different.  If you collected the names
> of such things, it might be possible to make an educated guess as to
> whether that is being done.
> 
> That fails horribly when the compiler elides different constants of the
> same value into one, of course :-)

Interesting ... I told Jakub Jelinek some two years ago that for Fortran 
it was OK to smash all equal constants into one value (you can't do that 
in C because they have to have a different address).

Do you think I made a mistake, standards-wise ?

-- 
Toon Moene - e-mail: toon@moene.org - phone: +31 346 214290
Saturnushof 14, 3738 XG  Maartensdijk, The Netherlands
At home: http://moene.org/~toon/; weather: http://moene.org/~hirlam/
Progress of GNU Fortran: http://gcc.gnu.org/gcc-4.5/changes.html#Fortran