DIP19: Remove comma operator from D and provision better syntactic support for tuples

[Timon Gehr]

On 09/24/2012 03:41 AM, Jonathan M Davis wrote:
> On Monday, September 24, 2012 03:31:08 deadalnix wrote:
>> Le 24/09/2012 03:14, Andrei Alexandrescu a écrit :
>>> On 9/23/12 7:20 PM, Adam D. Ruppe wrote:
>>>> On Sunday, 23 September 2012 at 22:55:33 UTC, Timon Gehr wrote:
>>>>> I believe it is currently left-to-right for D, in all kinds of
>>>>> expressions, but DMD does not implement it yet.
>>>>
>>>> Yeah, I thought it was already defined.
>>>
>>> Actually it's right to left for assignments. In expr1 = expr2, expr2
>>> gets evaluated first.
>>>
>>> Andrei
>>
>> Is it by implementation or by design ?
>
> Design. It makes no sense for the left-hand side of an assignment to be
> evaluated before the right-hand side.
>

Of course it does. Some values are returned by dereferencing a hidden 
argument.

> It's function arguments that should be evaluated left-to-right.
>
> - Jonathan M Davis
>