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| struct Q: ExpressibleByStringLiteral { | |
| typealias StringLiteralType = String | |
| var question: String | |
| init?(_ possibleQuestion: StringLiteralType) { | |
| return nil | |
| } | |
| init(stringLiteral str: StringLiteralType) { | |
| self.question = str | |
| } | |
| } | |
| // Swift 4.2 | |
| _ = Q("ultimate question") // 'nil' | |
| _ = "ultimate question" as Q // Q(question: 'ultimate question') | |
| // Swift 5 | |
| _ = Q("ultimate question") // Q(question: "ultimate question") | |
| _ = "ultimate question" as Q // Q(question: 'ultimate question') |
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