[mpi-21] const C++ MPI handles (take 2)
jsquyres at [hidden]
Fri Jan 18 13:13:33 CST 2008
On Jan 18, 2008, at 2:02 PM, Erez Haba wrote:
> Okay; about one issue at a time.
Changing mail subject to reflect the discussion...
> *For this sentence* it does not matter what's a common usage for C++
> global variables. Some MPI implementations would need to have non-
> const qualified global objects.
Why? As I understand it, most (all?) MPI C++ implementations
currently only require some objects to be non-const because of the
standard-related issue that was already raised (Set_attr(),
Set_name(), Set_errhandler() methods not having const variants). Is
there a reason that an implementation would *need* MPI handles to be
Per my prior mail, I believe that the standard should specify that
some of the methods on these classes should have const and non-const
variants, and then it should be fine to require that the predefined
handles be const.
So the question is still open: what's common practice in the C++
community regarding const/non-const global variable specification?
This question will be moot if you can demonstrate that an
implementation would need non-const C++ MPI predefined handles.
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