src/test/ui/tuple/tuple-struct-fields/test2.rs


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macro_rules! define_struct {
    ($t:ty) => {
        struct S1(pub $t);
        struct S2(pub (in foo) ());
        struct S3(pub $t ());
        //~^ ERROR expected one of `)` or `,`, found `(`
    }
}

mod foo {
    define_struct! { (foo) }
}