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36 lines
1.0 KiB
Swift
36 lines
1.0 KiB
Swift
// RUN: %empty-directory(%t)
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// RUN: %target-build-swift %s -o %t/a.out4 -swift-version 4 && %target-codesign %t/a.out4 && %target-run %t/a.out4
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// RUN: %target-build-swift %s -o %t/a.out5 -swift-version 5 && %target-codesign %t/a.out5 && %target-run %t/a.out5
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// REQUIRES: executable_test
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import StdlibUnittest
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#if swift(>=4.2)
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let swiftVersion = ">=4.2"
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#else
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let swiftVersion = "<4.2"
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#endif
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let tests = TestSuite("ReverseCompatibility")
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tests.test("Double reverse type/Collection/\(swiftVersion)") {
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func reverse<C : BidirectionalCollection>(_ xs: C) {
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var result = xs.reversed().reversed()
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#if swift(>=4.2)
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expectType(C.self, &result)
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#else
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expectType(ReversedCollection<ReversedCollection<C>>.self, &result)
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#endif
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}
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reverse(Array(0..<10))
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func backwardCompatible<C : BidirectionalCollection>(_ xs: C) {
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typealias ExpectedType = ReversedCollection<ReversedCollection<C>>
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var result: ExpectedType = xs.reversed().reversed()
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expectType(ExpectedType.self, &result)
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}
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backwardCompatible(Array(0..<10))
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}
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runAllTests()
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