User defined type and foreach

[Andrea Fontana]

On Thursday, 16 November 2017 at 08:03:48 UTC, Tony wrote:
> I made a stack data type and created an opIndex() so it could 
> be turned into a dynamic array, and created empty() 
> (unfortunate name), front() and popFront() methods, which I 
> read allow it to be used with foreach.
>
> However, when I use the class with foreach, the opindex gets 
> called to create a dynamic array, rather than use the 
> empty(),front(),popFront() routines. I would prefer it use the 
> three methods, rather than create a dynamic array.

You can try to implement opApply().
Check:
http://ddili.org/ders/d.en/foreach_opapply.html