Framework design, initialization and framework usage

[Adam D. Ruppe]

On Monday, 6 May 2019 at 16:50:14 UTC, Robert M. Münch wrote:
> 	myFramework mf = new myFramework;

I'd make that thing's constructor private, and then offer a 
helper template function that actually creates it and the user 
passes a type.

---
// inside your library
struct myFramework {
    private MyFramework app;
    private this(MyFramework app) {
       this.app = app;
    }
}

myFramework initializeMyFramework(FrameworkClass)() 
if(is(FrameworkClass : myFrameworkApp))
{
     return myFramework(new FrameworkClass());
}
---

Then the user's code would look something like this:

---
import my_framework;
class myAppCode : myFrameworkApp {
     // implementations....
}

void main() {
    auto thing = initializeMyFramework!myAppCode;
    // if you have other stuff to do with thing, you can here.
}
---