docs generation for mixins

[ikod via Digitalmars-d-learn]

Hello,

sorry if this question was asked before...

How can I get docs generated for int z?

-----
string V(string var) {
     return "int " ~ var ~ ";";
}
///
struct X {
     /// comment for y
     int y;
     /// comment for z
     mixin(V("z"));
}

void main()
{
}
-----

"dmd -D -Dddocs" generate docs for "y" only.

Thanks