Bill Baxter wrote:
On Tue, Jul 28, 2009 at 12:09 AM, Don<nos...@nospam.com> wrote:
Walter once claimed that it's useful for automatically generated code.
Though I'm still not quite sure how.
Yes. He's recently the claimed the same thing about the comma operator, but
I don't buy that argument. I've never needed to use either of them myself.
(In the case of comma, sure it works as a sequence point when you have: a,b,
return a; but it doesn't work for a,b, return b; which is 50% of the cases.
I think it's a fallacious argument). Interestingly CommaExpression doesn't
seem to be defined anywhere in the D spec.
You meant to say it doesn't work for a,b, return a; right?
Yes.
And I don't think that would be 50% of the cases. a,b,return b seems
much more common.
The only time I've considered using comma is with: assert(a); b =
foo(a); assert(c); return b;
But you're probably right, it's less than 50% of the time in practice.
But either way the argument is ridiculous. It doesn't need to be as
basic an operator as a single comma just for the sake of making code
generation easier.
--bb
