Killing the comma operator

[Lionello Lunesu via Digitalmars-d]

On 13/5/2016 20:44, Nick Treleaven wrote:
> On Thursday, 12 May 2016 at 02:51:33 UTC, Lionello Lunesu wrote:
>> I'm trying to think of a case where changing a single value into a
>> tuple with 2 (or more) values would silently change the behavior, but
>> I can't think of any. Seems to me it would always cause an error, iff
>> the result of the comma operator gets used.
>
> int x,y;
> auto f() {return (x=4,y);}
> ...
> auto z = f();
> static if (!is(typeof(z) == int)
>    voteForTrump();
>
> ;-)
>
> In practice, this is more plausible with function overloading - i.e.
> z.overload() calling a different function. If the comma operator returns
> void, the `auto z` line and f().overload() both fail.

Good point. Thanks.