Incorrect "no such field" error

[SamRodri]

In the latest version (v0.2.224) this code causes the incorrect error:

macro_rules! Type {
    () => { u32 };
}

struct Foo {
    bar: Type![],
}
impl Foo {
    fn new() -> Self {
        Foo {
            bar: 0 // <- incorrect error here
        }
    }
}

I first encountered this using the syn Token! macro.

[flodiebold]

We don't expand type-position macros yet.

[SamRodri]

It used to work, just with an unknown type, now the field is missing.