1 error: expected one of `)` or `,`, found `(`
4 LL | struct S3(pub $t ());
5 | ^ expected one of `)` or `,` here
7 LL | define_struct! { (foo) }
8 | ------------------------ in this macro invocation
10 error[E0412]: cannot find type `foo` in this scope
11 --> $DIR/test2.rs:11:23
13 LL | define_struct! { (foo) }
14 | ^^^ not found in this scope
16 error: aborting due to 2 previous errors
18 For more information about this error, try `rustc --explain E0412`.