Structure within macro not visible where used

help
1

The following code is reporting that TreeSemantics1 is not defined outside of the macro itself.

I've tried that internal structure pub, and not even that make difference; however, the IDE tooltip hovering over the TreeSemantics1 identifier points to the actual structure.

#![feature(decl_macro)]

pub struct TreeSemantics {
    common: TreeSemantics1,
}

macro impl_semantics_1 {
    () => {
        struct TreeSemantics1 {}
    },
}

impl_semantics_1!();
2
3

I had to pass an explicit identifier from outside to define the TreeSemantics1 structure and its new method:

impl_semantics_1!(
    TreeSemantics1,
    new,
    ...
);
4

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