Should the comma operator be removed in D2?

[Justin Johansson]

Adam D. Ruppe wrote:
> On Mon, Nov 16, 2009 at 10:12:57PM +0000, dsimcha wrote:
>> Can someone please explain to me what the comma operator does? 
> 
> 	a = b, c;
> 
> Is the same as:
> 
> 	b;
> 	a = c;
> 
> In the comma operation, the first thing is evaluate, and its result discarded.
> Then, the second thing (after the comma) is evaluated. The overall result
> of the comma operator is the result of the second statement.
> 
> 	1, 2 == 2
> 
> The usefulness is putting two statements together, where it only expects
> one, like inside the for loop, where the semicolon moves you on from the
> initialization to the condition.

Speaking of for loops, it's not uncommon to use the comma operator in 
the 1st and 3rd expression places, e.g. (in C), something along the lines:

void fun( char* start, int n) {
   int i;
   char* p;

   for ( i = 0, p = start; (i < n) && (*p != 0); ++i, ++p) {
     /* ... */
   }

}