omochimetaru

@swift-5.5.3 func foo() { let a: Void let b: Int }

stderr:

<stdin>:2:7: warning: immutable value 'a' was never used; consider replacing with '_' or removing it let a: Void ^ _ <stdin>:3:7: warning: immutable value 'b' was never used; consider replacing with '_' or removing it let b: Int ^ _