Doubt about alias this

[d coder]

Greetings

Kindly take a look at the code below. I am using alias this with a function
that returns by value. I believe in such cases the alias should not take
affect when an instance of foo is being used as an lvalue. As a result
elements of bar should not have been visible inside the constructor of foo.

Please comment. Is this a bug?

Regards
- Puneet

struct bar (bool B, N...) {
  int n = 0;
}

struct foo (N...) {
  bar!(true, N) _bar = void;

  bar!(true, N) getN() {
    return _bar;
  }

  alias getN this;

  public this(T) (T other)
    if (is(T unused : int)) {
    n = other;
  }
}


void main() {
  import std.stdio;
  foo!8 a = 42;
  writeln(a.n);
}
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