Re: User defined type and foreach

[Tony via Digitalmars-d-learn]

On Thursday, 16 November 2017 at 12:56:18 UTC, Steven 
Schveighoffer wrote:
On 11/16/17 3:03 AM, 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.

Remove the opIndex, and see if it works. If it does, then this 
is a bug. The compiler should try to use the type as a range 
before seeing if opIndex gives it something.

Yes, if I remove opIndex() from the class, doing a foreach loop 
causes popFront(),empty(), and front() to be called and the 
foreach loop works.