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// RUN: %target-run-simple-swift(-Xfrontend -disable-availability-checking)
// REQUIRES: executable_test
// This test requires the new existential shape metadata accessors which are
// not available in on-device runtimes, or in the back-deployment runtime.
// UNSUPPORTED: use_os_stdlib
// UNSUPPORTED: back_deployment_runtime
import StdlibUnittest
var ParameterizedProtocolsTestSuite = TestSuite("ParameterizedProtocols")
protocol Holder<T> {
associatedtype T
var value: T { get }
}
struct IntHolder: Holder {
var value: Int
}
struct GenericHolder<T>: Holder {
var value: T
}
ParameterizedProtocolsTestSuite.test("basic") {
let x: any Holder<Int> = IntHolder(value: 5)
expectEqual(5, x.value)
}
func staticType<T>(of value: inout T) -> Any.Type {
return T.self
}
func staticTypeForHolders<T>(of value: inout any Holder<T>) -> Any.Type {
return (any Holder<T>).self
}
ParameterizedProtocolsTestSuite.test("metadataEquality") {
var x: any Holder<Int> = IntHolder(value: 5)
var typeOne = staticType(of: &x)
var typeTwo = staticTypeForHolders(of: &x)
expectEqual(typeOne, typeTwo)
}
ParameterizedProtocolsTestSuite.test("casting") {
let a = GenericHolder(value: 5) as any Holder<Int>
let b = GenericHolder(value: 5) as! any Holder<Int>
expectEqual(a.value, b.value)
}
// rdar://96571508
struct ErasingHolder<T> {
let box: any Holder<T>
}
ParameterizedProtocolsTestSuite.test("casting") {
let a = ErasingHolder(box: IntHolder(value: 5))
expectEqual(a.box.value, 5)
}
runAllTests()
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