About += and ++

[Richard]

Can you state with absolute certainty that all C compilers everywhere
do? In all possible situations?

Of course not, in the same way I can not be assured that the standard
means the same thing to some language lawyers in another state. But
meanwhile in the real world where common sense applies ....

 

[John Bode]

Of course not, in the same way I can not be assured that the standard
means the same thing to some language lawyers in another state. But
meanwhile in the real world where common sense applies ....

In the "real world" where common sense applies, it's reasonable to
point out that not all compilers are guaranteed to behave the same way
for a given language construct (*especially* for the pre/post
increment operators). Normally that would be an uncontroversial
statement, but you and Twink are so eager to pounce on any perceived
instance of pedantry that you come off sounding like idiots.

 

[Harald van Dijk]

Can you name a compiler that doesn't?

Yes. Nils Weller's compiler (from <http://nwcc.sourceforge.net/>) doesn't
optimise at all, and generates different code for the two expressions in
the version I tried.