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// RUN: %target-swift-frontend -emit-sil -verify %s
struct Payload: ~Copyable {
var x: Int
var y: String
}
enum Foo: ~Copyable {
case payload(Payload)
case noPayload
}
enum Bar: ~Copyable {
case payload(Foo)
case noPayload
}
struct AOPayload: ~Copyable {
var x: Any
}
enum AOBar: ~Copyable {
case loadablePayload(Foo)
case aoPayload(AOPayload)
}
enum AOBas: ~Copyable {
case payload(AOBar)
case noPayload
}
func condition(_: borrowing Payload) -> Bool { fatalError() }
func condition(_: borrowing AOPayload) -> Bool { fatalError() }
func condition(_: borrowing Foo) -> Bool { fatalError() }
func condition(_: borrowing AOBar) -> Bool { fatalError() }
func condition(_: borrowing AOBas) -> Bool { fatalError() }
func hungryCondition(_: consuming Payload) -> Bool { fatalError() }
func hungryCondition(_: consuming AOPayload) -> Bool { fatalError() }
func hungryCondition(_: consuming Foo) -> Bool { fatalError() }
func hungryCondition(_: consuming AOBar) -> Bool { fatalError() }
func hungryCondition(_: consuming AOBas) -> Bool { fatalError() }
func nibble(payload: borrowing Payload) {}
func nibble(payload: borrowing AOPayload) {}
func nibble(payload: borrowing Foo) {}
func nibble(payload: borrowing AOBar) {}
func nibble(payload: borrowing AOBas) {}
func eat(payload: consuming Payload) {}
func eat(payload: consuming AOPayload) {}
func eat(payload: consuming Foo) {}
func eat(payload: consuming AOBar) {}
func eat(payload: consuming AOBas) {}
func test(consuming foo: consuming Bar) { // expected-error{{'foo' used after consume}}
switch foo {
case .payload(.payload(let x))
where condition(x):
nibble(payload: x)
// can't consume borrowed bindings in either `where` condition
// or body
case .payload(.payload(let x)) // expected-error{{cannot be consumed}}
where hungryCondition(x): // expected-note{{consumed here}}
eat(payload: x) // expected-note{{consumed here}}
case .payload(.payload(let x)): // expected-warning{{}}
break
case .payload(.noPayload):
()
case .noPayload:
()
}
switch consume foo { // expected-note{{consumed here}}
case .payload(.payload(let x))
where condition(x):
nibble(payload: x)
// can't consume in a `where` condition even if binding is consumable
case .payload(.payload(let x)) // expected-error{{cannot be consumed}}
where hungryCondition(x): // expected-note{{consumed here}}
// consuming in the case block is OK though
eat(payload: x)
case .payload(.payload(let x)): // expected-warning{{}}
break
case .payload(.noPayload):
()
case .noPayload:
()
}
switch foo { // expected-note{{used here}}
case let x: // expected-warning{{}}
break
}
}
@_silgen_name("nibble_bar")
func nibble(bar: borrowing Bar)
func test(borrowing foo: borrowing Bar) { // expected-error{{'foo' is borrowed and cannot be consumed}}
// can't use consuming patterns on a borrow
// TODO: improve diagnostic
switch consume foo { // expected-note{{consumed here}}
case .payload(.payload(let x)): // expected-warning{{}}
break
case .payload(.noPayload):
()
case .noPayload:
()
}
switch foo {
case .payload(.payload(let x))
where condition(x):
nibble(payload: x)
case .payload(.payload(let x)) // expected-error{{'x' is borrowed and cannot be consumed}}
where hungryCondition(x): // expected-note{{consumed here}}
eat(payload: x) // expected-note{{consumed here}}
case .payload(.payload(let x)): // expected-warning{{}}
break
case .payload(.noPayload):
()
case .noPayload:
()
}
}
func testOuterAO(borrowing bas: borrowing AOBas) {
switch bas {
case let x // expected-error{{'x' is borrowed and cannot be consumed}}
where condition(x):
nibble(payload: x)
eat(payload: x) // expected-note {{consumed here}}
case let x // expected-error 2 {{'x' is borrowed and cannot be consumed}}
where hungryCondition(x): // expected-note {{consumed here}}
nibble(payload: x)
eat(payload: x) // expected-note {{consumed here}}
case .payload(let x) // expected-error{{'x' is borrowed and cannot be consumed}}
where condition(x):
nibble(payload: x)
eat(payload: x) // expected-note {{consumed here}}
case .payload(let x) // expected-error 2 {{'x' is borrowed and cannot be consumed}}
where hungryCondition(x): // expected-note {{consumed here}}
nibble(payload: x)
eat(payload: x) // expected-note {{consumed here}}
case .payload(.loadablePayload(let x)) // expected-error{{'x' is borrowed and cannot be consumed}}
where condition(x):
nibble(payload: x)
eat(payload: x) // expected-note{{consumed here}}
case .payload(.loadablePayload(.payload(let x))) // expected-error{{'x' is borrowed and cannot be consumed}}
where condition(x):
nibble(payload: x)
eat(payload: x) // expected-note{{consumed here}}
case .payload(.aoPayload(let x)) // expected-error{{'x' is borrowed and cannot be consumed}}
where condition(x):
nibble(payload: x)
eat(payload: x) // expected-note {{consumed here}}
case .payload(let x): // expected-error{{'x' is borrowed and cannot be consumed}}
nibble(payload: x)
eat(payload: x) // expected-note {{consumed here}}
case .noPayload:
break
}
}
func testOuterAO(consuming bas: consuming AOBas) { // expected-error{{'bas' used after consume}}
switch bas {
case let x // expected-error{{'x' is borrowed and cannot be consumed}}
where condition(x):
nibble(payload: x)
eat(payload: x) // expected-note {{consumed here}}
case let x // expected-error 2 {{'x' is borrowed and cannot be consumed}}
where hungryCondition(x): // expected-note {{consumed here}}
nibble(payload: x)
eat(payload: x) // expected-note {{consumed here}}
case .payload(let x) // expected-error{{'x' is borrowed and cannot be consumed}}
where condition(x):
nibble(payload: x)
eat(payload: x) // expected-note {{consumed here}}
case .payload(let x) // expected-error 2 {{'x' is borrowed and cannot be consumed}}
where hungryCondition(x): // expected-note {{consumed here}}
nibble(payload: x)
eat(payload: x) // expected-note {{consumed here}}
case .payload(.loadablePayload(let x)) // expected-error{{'x' is borrowed and cannot be consumed}}
where condition(x):
nibble(payload: x)
eat(payload: x) // expected-note{{consumed here}}
case .payload(.loadablePayload(.payload(let x))) // expected-error{{'x' is borrowed and cannot be consumed}}
where condition(x):
nibble(payload: x)
eat(payload: x) // expected-note{{consumed here}}
case .payload(.aoPayload(let x)) // expected-error{{'x' is borrowed and cannot be consumed}}
where condition(x):
nibble(payload: x)
eat(payload: x) // expected-note {{consumed here}}
case .payload(let x): // expected-error{{'x' is borrowed and cannot be consumed}}
nibble(payload: x)
eat(payload: x) // expected-note {{consumed here}}
case .noPayload:
break
}
switch consume bas { // expected-note {{consumed here}}
case let x
where condition(x):
nibble(payload: x)
eat(payload: x)
case let x // expected-error {{borrowed and cannot be consumed}}
where hungryCondition(x): // expected-note {{consumed here}}
nibble(payload: x)
eat(payload: x)
case .payload(let x)
where condition(x):
nibble(payload: x)
eat(payload: x)
// TODO: look through `consume` expression when finding component path to diagnose
case .payload(let x) // expected-error {{'unknown' is borrowed and cannot be consumed}}
where hungryCondition(x): // expected-note {{consumed here}}
nibble(payload: x)
eat(payload: x)
case .payload(.loadablePayload(let x))
where condition(x):
nibble(payload: x)
eat(payload: x)
case .payload(.loadablePayload(.payload(let x))) // expected-error{{'unknown' is borrowed and cannot be consumed}}
where hungryCondition(x): // expected-note{{consumed here}}
nibble(payload: x)
eat(payload: x)
case .payload(.aoPayload(let x))
where condition(x):
nibble(payload: x)
eat(payload: x)
case .payload(let x):
nibble(payload: x)
eat(payload: x)
case .noPayload:
break
}
switch bas { // expected-note{{used here}}
case let x: // expected-warning{{}}
break
}
}
enum E<T>: ~Copyable {
case a(T)
}
extension E {
func f() {
switch self {
case .a:
print("a")
}
}
func g() {
switch self {
case .a(let t): // expected-warning{{}}
print("a")
}
}
}
struct Box: ~Copyable {
let ptr: UnsafeMutablePointer<Int>
}
struct ChonkyBox: ~Copyable {
let container: Any
}
enum List<Element>: ~Copyable {
case end
case more(Element, Box)
}
enum ChonkyList<Element>: ~Copyable {
case end
case more(Element, ChonkyBox)
}
extension List {
var isEmpty: Bool {
switch self {
case .end: true
case .more: false
}
}
var peek: Box {
_read {
switch self {
case .end:
fatalError()
case .more(_, let box):
yield box
}
}
}
var head: Element {
_read {
switch self {
case .end:
fatalError()
case .more(let head, _):
yield head
}
}
}
}
extension ChonkyList {
var isEmpty: Bool {
switch self {
case .end: true
case .more: false
}
}
var peek: ChonkyBox {
_read {
switch self {
case .end:
fatalError()
case .more(_, let box):
yield box
}
}
}
var head: Element {
_read {
switch self {
case .end:
fatalError()
case .more(let head, _):
yield head
}
}
}
}
// https://github.com/apple/swift/issues/71598
struct RangeHolder:~Copyable
{
var r:Range<Int> { fatalError() }
var y:Int { self.r.upperBound }
}
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