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59 lines
1.2 KiB
Swift
59 lines
1.2 KiB
Swift
//===--- checked_cast_test.swift ------------------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2018 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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// RUN: %target-run-simple-swift
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// REQUIRES: executable_test
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// Test that we emit proper ARC here and do not crash.
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private class Foo {
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init() {}
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}
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final private class Bar : Foo {
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}
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final private class Baz : Foo {
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}
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private func checked_cast_default(_ f: Foo) -> Int {
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switch f {
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case is Bar:
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return 0
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case is Baz:
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return 1
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default:
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return 2
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}
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}
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private func checked_cast_exhaustive(_ f: Foo) -> Int {
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switch f {
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case is Bar:
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return 0
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case is Baz:
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return 1
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case is Foo:
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return 2
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}
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}
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func main() {
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let b = Baz()
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let x = checked_cast_default(b)
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precondition(x == 1)
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let y = checked_cast_exhaustive(b)
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precondition(y == 1)
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}
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main()
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