[Issue 7177] $ should forward to length by default

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=7177



--- Comment #19 from monarchdodra at gmail.com 2013-03-21 08:32:44 PDT ---
(In reply to comment #14)
> Yes, it makes sense in some cases for opDollar not to be length.
>
> [SNIP]

Note though that opDollar would *fallback* to length if you did not implement
opDollar. You are still free to implement your own opDollar if you wish, so
your DCollections would still be fine.

(In reply to comment #15)
> (In reply to comment #14)
> > Another example is int[int]:
> > 
> > int[int] x;
> > x[1] = 14;
> > x[100] = 42;
> > assert(x[$-1] == 14);
> 
> That's a strong case. If compiler tries to translate $ to length automatically,
> library AA implementation will become impossible.
> 
> I'll close my pull request.

No need! Please don't close it quite yet. A simple "@disable opDollar();" or
"private opDollar();" should shut down this problem.

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