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// RUN: %target-run-simple-swift
//
// RUN: %target-build-swift -swift-version 5 -O %s -o %t/a.swift5.O.out
// RUN: %target-codesign %t/a.swift5.O.out
// RUN: %target-run %t/a.swift5.O.out
//
// RUN: %target-build-swift -swift-version 5 -Onone %s -o %t/a.swift5.Onone.out
// RUN: %target-codesign %t/a.swift5.Onone.out
// RUN: %target-run %t/a.swift5.Onone.out
//
// REQUIRES: executable_test
import StdlibUnittest
let tupleCastTests = TestSuite("Tuple casting")
func anyToIntPoint(_ x: Any) -> (x: Int, y: Int) {
return x as! (x: Int, y: Int)
}
func anyToIntPointOpt(_ x: Any) -> (x: Int, y: Int)? {
return x as? (x: Int, y: Int)
}
func anyToInt2(_ x: Any) -> (Int, Int) {
return x as! (Int, Int)
}
func anyToPartlyLabeled(_ x: Any) -> (first: Int, Int, third: Int) {
return x as! (first: Int, Int, third: Int)
}
tupleCastTests.test("Adding/removing labels") {
expectEqual("(x: 1, y: 2)",
String(describing: anyToIntPoint((x: 1, y: 2))))
expectEqual("(x: 3, y: 4)",
String(describing: anyToIntPoint((3, 4))))
expectEqual("(x: 5, y: 6)",
String(describing: anyToIntPoint((x: 5, 6))))
expectEqual("(x: 5, y: 6)",
String(describing: anyToIntPoint((5, y: 6))))
expectEqual("(1, 2)", String(describing: anyToInt2((1, 2))))
expectEqual("(3, 4)", String(describing: anyToInt2((x: 3, y: 4))))
expectEqual("(5, 6)", String(describing: anyToInt2((x: 5, 6))))
expectEqual("(7, 8)", String(describing: anyToInt2((7, y: 8))))
expectEqual("(first: 1, 2, third: 3)",
String(describing: anyToPartlyLabeled((1, 2, 3))))
}
tupleCastTests.test("Label checks on casting") {
expectTrue((x: 1, y: 2) is (Int, Int))
expectTrue((x: 1, y: 2) is (x: Int, Int))
expectTrue((x: 1, y: 2) is (Int, y: Int))
expectTrue((x: 1, y: 2) is (x: Int, y: Int))
expectFalse((x: 1, y: 2) is (x: Int, z: Int))
expectFalse((x: 1, y: 2) is (a: Int, y: Int))
expectFalse((x: 1, y: 2) is (a: Int, z: Int))
expectFalse((x: 1, y: 2) is (Int, z: Int))
expectFalse((x: 1, y: 2) is (a: Int, Int))
}
tupleCastTests.test("Incorrect labels conditional cast") {
expectNil(anyToIntPointOpt((x: 1, z: 2)))
expectEqual("Optional((x: 1, y: 2))",
String(describing: anyToIntPointOpt((x: 1, y: 2))))
}
tupleCastTests
.test("Incorrect labels forced cast")
.crashOutputMatches("Could not cast value of type '(x: Swift.Int, z: Swift.Int)'")
.code {
expectCrashLater()
_ = anyToIntPoint((x: 1, z: 2))
}
func castToThree<T, U, V>(_ x: Any, _: T.Type, _: U.Type, _: V.Type)
-> (t: T, u: U, v: V) {
return x as! (t: T, u: U, v: V)
}
func castToThreeOpt<T, U, V>(_ x: Any, _: T.Type, _: U.Type, _: V.Type)
-> (t: T, u: U, v: V)? {
return x as? (t: T, u: U, v: V)
}
class LifetimeA {
var tracked: LifetimeTracked
init(value: Int) {
tracked = LifetimeTracked(value)
}
}
class LifetimeB : LifetimeA {
}
class LifetimeC : LifetimeA {
}
protocol P { }
extension LifetimeA : P { }
tupleCastTests.test("Elementwise tuple casts that succeed") {
let abc: (P, Any, P) = (LifetimeA(value: 1),
LifetimeB(value: 2),
LifetimeC(value: 3))
expectEqual(
"(t: main.LifetimeA, u: main.LifetimeB, v: main.LifetimeC)",
String(describing: castToThree(abc, LifetimeA.self, LifetimeA.self,
LifetimeA.self)))
expectEqual(
"(t: main.LifetimeA, u: main.LifetimeB, v: main.LifetimeC)",
String(describing: castToThree((LifetimeA(value: 1),
LifetimeB(value: 2),
LifetimeC(value: 3)) as (P, Any, P),
LifetimeA.self, LifetimeA.self,
LifetimeA.self)))
}
tupleCastTests.test("Elementwise tuple casts that conditionally fail") {
let abc: (P, Any, P) = (LifetimeA(value: 1),
LifetimeB(value: 2),
LifetimeC(value: 3))
expectNil(castToThreeOpt(abc, LifetimeA.self, LifetimeB.self, LifetimeB.self))
expectNil(castToThreeOpt(abc, LifetimeA.self, LifetimeC.self, LifetimeC.self))
expectNil(castToThreeOpt(abc, LifetimeC.self, LifetimeB.self, LifetimeC.self))
}
tupleCastTests
.test("Elementwise tuple casts that crash (1/3)")
.crashOutputMatches("Could not cast value of type 'main.LifetimeA'")
.code {
let abc: (P, Any, P) = (LifetimeA(value: 1),
LifetimeB(value: 2),
LifetimeC(value: 3))
expectCrashLater()
_ = castToThree(abc, LifetimeC.self, LifetimeB.self, LifetimeC.self)
}
tupleCastTests
.test("Elementwise tuple casts that crash (2/3)")
.crashOutputMatches("Could not cast value of type 'main.LifetimeB")
.code {
let abc: (P, Any, P) = (LifetimeA(value: 1),
LifetimeB(value: 2),
LifetimeC(value: 3))
expectCrashLater()
_ = castToThree(abc, LifetimeA.self, LifetimeC.self, LifetimeC.self)
}
tupleCastTests
.test("Elementwise tuple casts that crash (3/3)")
.crashOutputMatches("Could not cast value of type 'main.LifetimeC")
.code {
let abc: (P, Any, P) = (LifetimeA(value: 1),
LifetimeB(value: 2),
LifetimeC(value: 3))
expectCrashLater()
_ = castToThree(abc, LifetimeA.self, LifetimeB.self, LifetimeB.self)
}
runAllTests()
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