Stewart Gordon wrote:
Andrei Alexandrescu wrote:
<snip>
This has been a source of long discussion in C++ circles, and Walter
and I have also discussed the matter several times. Defining order of
evaluation has good benefits, and the loss in efficiency has with time
been reduced to just a few corner cases that don't seem to justify the
cost anymore. Note that operations can still be evaluated in parallel
as long as there's no dependencies between them.
So the compiler would be allowed to parallelise only if it can determine
that the two subexpressions don't depend on each other?
Yes.
This could get
complicated when you consider calculations that are involved enough to
be worth parallelising in the first place.
Quite the contrary, in fact. Involved calculations in a given expression
entail more often than not complicated operations as opposed to
complicated updates.
Andrei
