Say I have something like this:

    class A {
        class B {
        }

        B b;
    }

Right now, I have a loop that does something like this (taken from orange project):

    foreach (i, type; typeof(A.tupleof)) {
enum name = A.tupleof[i].stringof[1 + A.stringof.length + 2 .. $];
    }

This gets all members of class A (in this case only b), but I can't 'new' the class because it needs the context of the instance of A. So, I need to check (preferably at compile time) if b's type is an inner class or an outer class. If it's an inner class, I'll need to instantiate it with the reference of A.

std.traits doesn't seem to have anything useful. I'd like to know the following:

* is b's type instantiatable (is that a word?) without extra information?
* is b's type an inner class (needs reference to instantiate)

In my code, I have a reference handy, so I just need to know how to instantiate it.

I saw the macro 'compiles' in the traits documentation (__traits(compiles, ...)). Do I need to do something with this?

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