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