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// RUN: %target-run-simple-swift
// REQUIRES: executable_test
// REQUIRES: synchronization
import Synchronization
import StdlibUnittest
let suite = TestSuite("WordPairTests")
struct UIntPair: Equatable {
var first: UInt
var second: UInt
init(_ first: UInt, _ second: UInt) {
self.first = first
self.second = second
}
}
@available(SwiftStdlib 6.0, *)
func componentsInMemoryOrder(of dword: WordPair) -> UIntPair {
let p = UnsafeMutableRawPointer.allocate(
byteCount: MemoryLayout<WordPair>.size,
alignment: MemoryLayout<WordPair>.alignment)
p.storeBytes(of: dword, as: WordPair.self)
let first = p.load(as: UInt.self)
let second = p.load(fromByteOffset: MemoryLayout<UInt>.stride, as: UInt.self)
return UIntPair(first, second)
}
if #available(SwiftStdlib 6.0, *) {
suite.test("basics") {
expectEqual(MemoryLayout<WordPair>.size, 2 * MemoryLayout<UInt>.size)
expectEqual(MemoryLayout<WordPair>.stride, MemoryLayout<WordPair>.size)
//expectEqual(MemoryLayout<WordPair>.alignment, 2 * MemoryLayout<UInt>.alignment)
let value0 = WordPair(first: 2, second: 1)
#if _endian(little)
expectEqual(componentsInMemoryOrder(of: value0), UIntPair(2, 1))
#else
expectEqual(componentsInMemoryOrder(of: value0), UIntPair(1, 2))
#endif
let value1 = WordPair(first: .max, second: 0)
expectEqual(value1.first, .max)
expectEqual(value1.second, 0)
}
} // if #available(SwiftStdlib 6.0, *)
if #available(SwiftStdlib 6.1, *) {
suite.test("comparable") {
let c0 = WordPair(first: 0, second: 0)
let c1 = WordPair(first: 1, second: 0)
let c2 = WordPair(first: 2, second: 0)
let c3 = WordPair(first: 0, second: 1)
let c4 = WordPair(first: 1, second: 2)
let c5 = WordPair(first: 2, second: 1)
expectFalse(c0 < c0)
expectTrue(c0 < c1)
expectTrue(c0 < c2)
expectTrue(c0 < c3)
expectFalse(c1 < c0)
expectTrue(c4 < c5)
expectFalse(c5 < c4)
}
} // if #available(SwiftStdlib 6.1, *)
runAllTests()
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