It's a class! It's a struct! It's ... SuperStruct!

[rcorre via Digitalmars-d-announce]

On Sunday, 18 October 2015 at 21:18:52 UTC, rcorre wrote:
> On Sunday, 18 October 2015 at 21:00:32 UTC, Meta wrote:
>> On Sunday, 18 October 2015 at 19:00:16 UTC, rcorre wrote:
>> You might find this interesting. It's an "outside-in" approach 
>> to the same problem as opposed to your "inside-out" approach. 
>> Not finished, but the general idea is there.
>>
>> https://github.com/MetaLang/phobos/commit/c8132f53b791ed4a134dd456c8fd20d0d201731d
>
> That's just the kind of thing I was looking for! I actually 
> started with a 'visitor' function that works similar to project:
>
> https://github.com/rcorre/superstruct/blob/master/src/superstruct.d#L153-L166
>
> then decided to wrap the whole thing in a struct to expose the 
> members more 'naturally'.
>
> I think having something like project in phobos would be pretty 
> useful though.

And at the risk of going a little overboard, I think the answer 
to supporting arbitrary templated functions is to wrap 
visitor/project itself in a template, that then returns a 
variadic function while passing along other compile-time args. 
Maybe. I haven't thought it through too carefully...