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https://github.com/apple/swift.git
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Ben Cohen
104 lines
3.1 KiB
Swift
104 lines
3.1 KiB
Swift
//===--- NoncopyableHashable.swift - tests for Hashable: ~Copyable ----------===//
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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 - 2025 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(-enable-experimental-feature Lifetimes)
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// REQUIRES: executable_test
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// REQUIRES: swift_feature_Lifetimes
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import StdlibUnittest
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let NoncopyableHashableTests = TestSuite("NoncopyableHashable")
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struct Noncopyable<Wrapped: ~Copyable & ~Escapable>: ~Copyable {
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var wrapped: Wrapped
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@_lifetime(copy wrapped)
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init(wrapping wrapped: consuming Wrapped) {
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self.wrapped = wrapped
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}
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}
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extension Noncopyable: Equatable where Wrapped: Equatable & ~Copyable & ~Escapable { }
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extension Noncopyable: Hashable where Wrapped: Hashable & ~Copyable & ~Escapable { }
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extension Noncopyable: Escapable where Wrapped: Escapable & ~Copyable { }
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struct Nonescapable: ~Escapable {
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let wrapped: Int
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}
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extension Nonescapable: Equatable { }
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extension Nonescapable: Hashable { }
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extension Hashable where Self: ~Copyable & ~Escapable {
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func sameHash(as other: borrowing Self) -> Bool {
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self.hashValue == other.hashValue
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}
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}
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func differentHash<T: Hashable & ~Copyable & ~Escapable>(_ lhs: borrowing T, _ rhs: borrowing T) -> Bool {
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lhs.hashValue != rhs.hashValue
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}
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@available(SwiftStdlib 6.2, *)
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extension InlineArray where Element: Hashable & ~Copyable {
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func combinedHashes() -> Int {
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var hasher = Hasher()
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for i in self.indices {
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self[i].hash(into: &hasher)
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}
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return hasher.finalize()
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}
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}
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NoncopyableHashableTests.test("hashing noncopyables") {
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let a = Noncopyable(wrapping: 1)
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let b = Noncopyable(wrapping: 2)
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let c = Noncopyable(wrapping: 1)
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expectTrue(a.sameHash(as: a))
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expectFalse(a.sameHash(as: b))
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expectTrue(a.sameHash(as: c))
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expectTrue(differentHash(a,b))
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expectFalse(differentHash(a,a))
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expectFalse(differentHash(a,c))
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let nc2 = Noncopyable(wrapping: Noncopyable(wrapping: "1"))
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expectTrue(nc2.sameHash(as: nc2))
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expectTrue(differentHash(nc2, .init(wrapping: .init(wrapping: "2"))))
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guard #available(SwiftStdlib 6.2, *) else { return }
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let a1: [_ of _] = [a,b]
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let d = Noncopyable(wrapping: 2)
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let a2: [_ of _] = [c,d]
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expectEqual(a1.combinedHashes(), a2.combinedHashes())
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}
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NoncopyableHashableTests.test("hashing nonescapables") {
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let nc1 = Noncopyable<Nonescapable>(wrapping: .init(wrapped: 1))
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let nc2 = Noncopyable<Nonescapable>(wrapping: .init(wrapped: 1))
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let nc3 = Noncopyable<Nonescapable>(wrapping: .init(wrapped: 2))
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expectTrue(nc1.hashValue == nc2.hashValue)
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expectFalse(nc1.hashValue == nc3.hashValue)
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expectTrue(nc1.sameHash(as: nc2))
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expectFalse(nc1.sameHash(as: nc3))
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expectTrue(differentHash(nc1, nc3))
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expectFalse(differentHash(nc1, nc2))
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}
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runAllTests()
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