// A flat-imported module authors its OWN `Box { a }`, a DISTINCT nominal from
// main's same-name `Box { m }`. The param-impl SOURCE `*Box` must register against
// main's `Box`, and the `xx` lookup at the use site must mangle to the SAME author,
// so the conversion is found and `self.m` resolves.
Box :: struct { a: s32; }

dep_box :: () -> s32 {
    b : Box = ---;
    b.a = 9;
    return b.a;
}