how to call class' template constructor

[ketmar via Digitalmars-d-learn]

Hello.

please, how to call template constructor of a class? it's completely
escaped my mind. i.e. i have this class:

  class A {
    this(alias ent) (string name) {
      ...
    }
  }

and i want to do:

  void foo () { ... }
  auto a = new A!foo("xFn");

yet compiler tells me that

"template instance A!foo A is not a template declaration, it is a class"

yes, i know that i can rewrite constructor to something like this:

  this(T) (string name, T fn) if (isCallable!T) {
    ...
  }

and then use autodeduction, but i want the first form! ;-)
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