Re: Making external types available to mixins

[Kagamin via Digitalmars-d-learn]

On Saturday, 17 November 2018 at 17:58:54 UTC, John Chapman wrote:
The following code doesn't compile because the generated type 
name needs to be available inside the mixin's scope, whereas 
it's actually in another module.

auto makeWith(string className, Args…)(auto ref Args args) {
  mixin("return makeWith!(I", className, "Factory)(args);"); // 
Fowarded to implementation of makeWith below
}

auto makeWith(T, Args…)(auto ref Args args) … // This is the 
implementation

The idea is that users could type (for example) 
makeWith!`Calendar`(…) instead of the longer 
makeWith!ICalendarFactory(…).

Well, just have all factories in one module and import it, then 
they will be visible.

import allfactories;
auto makeWith(string className, Args…)(auto ref Args args) {
  mixin("return makeWith!(I", className, "Factory)(args);"); // 
Fowarded to implementation of makeWith below
}

Or predeclare make functions in factory modules

interface ICalendarFactory
{
  ...
}

alias makeCalendar=makeWith!ICalendarFactory;