On Sunday, 18 November 2018 at 11:29:51 UTC, John Chapman wrote:
On Saturday, 17 November 2018 at 21:11:38 UTC, Adam D. Ruppe
wrote:
On Saturday, 17 November 2018 at 17:58:54 UTC, John Chapman
wrote:
Has anyone had a similar need and come up with a solution?
You might be able to just pass it the Calendar type, and then
fetch its parent module and get the ICalendarFactory from
there (assuming they are defined in the same module).
But generally speaking, passing strings to a mixin that refer
to something in another module isn't going to work well thanks
to scoping rules. You are better off passing a symbol of some
sort.
So there is no actual Calendar type. There's an
ICalendarFactory type that creates instances of ICalendar
(these types are part of a third-party API). "Calendar" is
just a key users could use when calling a "makeWith" method
that would build the ICalendar/Factory names, instantiate the
factory, call the appropriate factory method and return the
result. There are thousands of such object/factory pairs in the
API. Just trying to cut out a lot of boilerplate code, but it
doesn't seem doable this way.
Cheers,
So I had a go at this and I have a working solution.
https://run.dlang.io/is/oaH6Ib
At first, I tried to do everything in the mixin, as you can see
with the `failedAttempt` function. The idea was that this should
have worked like `mixin(failedAttempt!"Calendar"(1, 2, 3));`. As
you can see, and the name suggests, I wasn't able to make it work
with `args`.
The solution I have to your problem is to use a template, in this
case the `theType` template that will expand to the fully
qualified name. So you'd use it like
`makeWith!(theType!"Calendar")(args);`
Hope it helps!
Edi
