omochimetaru

let a = false let b = true switch (a, b) { case (true, true): break case (true, false): break case (false, true): break }

Version:

swift-4.1.1-RELEASE

Output:

Error:

/usercode/main.swift:4:1: error: switch must be exhaustive switch (a, b) { ^ /usercode/main.swift:4:1: note: add missing case: '(false, false)' switch (a, b) { ^