Should we deprecate comma?

[Etienne Cimon]

On 2014-03-24 00:04, Andrei Alexandrescu wrote:
> On 3/23/14, 8:22 PM, Etienne Cimon wrote:
>> How about allowing it only inside parenthesis?
>
> That works but breaks more valid code. -- Andrei
>

If the comma expression operator is outlawed on the global scope, 
variadic template parameters could be used with commas outside the 
parantheses which allows such syntax:

if(pMgr->ShouldRecordEvent(eSE_Weapon), pOwnerRaw) // ERROR
return pMgr->RecordEvent(eSE_Weapon), pOwnerRaw; // ERROR
if(e!pMgr->ShouldRecordEvent(eSE_Weapon), pOwnerRaw) // OK
return e!pMgr->RecordEvent(eSE_Weapon), pOwnerRaw; // OK

Would it make sense to reserve the global e identifier for expressions?

I'd be happy to see commas go and eventually wake up to this in a few 
years, also enabling what would seem like a new kind of comma operator 
overloading