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// RUN: %target-swift-frontend -emit-sil -verify %s
// RUN: %target-swift-frontend -DNONTRIVIAL -emit-sil -verify %s
// RUN: %target-swift-frontend -DNONTRIVIAL -DREABSTRACT -emit-sil -verify %s
// TODO: test with (-DNONTRIVIAL | -DADDRESS_ONLY) * (REABSTRACT)
protocol P {}
extension Int: P {}
class C {}
@_moveOnly
struct M {
#if ADDRESS_ONLY
private var x: P = 0
#elseif NONTRIVIAL
private var x: C = C()
#else
private var x: Int = 0
#endif
borrowing func borrow() {}
}
func borrow(_: borrowing M) {}
func consume(_: __owned M) {}
func mutate(_: inout M) {}
func borrow(_: borrowing M, consume _: __owned M) {}
#if REABSTRACT
func clodger<T>(_: () -> T) {}
func clodger<T>(_: () -> T, borrow _: borrowing M) {}
func clodger<T>(_: () -> T, consume _: __owned M) {}
func clodger<T>(_: () -> T, mutate _: inout M) {}
func clodger<T>(_: () -> T, and _: () -> T) {}
func clodger<T>(_: () -> T, and _: () -> T, consume _: __owned M) {}
#else
func clodger(_: () -> ()) {}
func clodger(_: () -> (), borrow _: borrowing M) {}
func clodger(_: () -> (), consume _: __owned M) {}
func clodger(_: () -> (), mutate _: inout M) {}
func clodger(_: () -> (), and _: () -> ()) {}
func clodger(_: () -> (), and _: () -> (), consume _: __owned M) {}
#endif
func reabstractClodger<T>(_: (T) -> T) {}
func a(x: borrowing M) {
clodger({ borrow(x) })
borrow(x)
}
func b(x: __owned M) { // expected-error {{'x' used after consume}}
clodger({ borrow(x) }, consume: x)
// expected-note @-1:25 {{used here}}
// expected-note @-2:37 {{consumed here}}
}
// We have a use after free here since we treat the passing of borrow to clodger
// to be a read use of x. So we consume x as part of preparing arguments and
// then have a read via the application of clodger.
func b2(x: consuming M) {
// expected-error @-1 {{'x' used after consume}}
clodger({ borrow(x) }, // expected-note {{conflicting access is here}}
// expected-note @-1 {{used here}}
consume: x) // expected-error {{overlapping accesses to 'x', but deinitialization requires exclusive access}}
// expected-note @-1 {{consumed here}}
}
func c(x: __owned M) {
clodger({ borrow(x) })
borrow(x)
consume(x)
}
func c2(x: consuming M) {
clodger({ borrow(x) })
borrow(x)
consume(x)
}
func d(x: __owned M) { // expected-error {{noncopyable 'x' cannot be consumed when captured by an escaping closure}}
clodger({ consume(x) })
// expected-note @-1 {{consumed here}}
}
func d2(x: consuming M) { // expected-error {{missing reinitialization of closure capture 'x' after consume}}
clodger({ consume(x) })
// expected-note @-1 {{consumed here}}
}
func e(x: inout M) {
clodger({ mutate(&x) })
mutate(&x)
borrow(x)
consume(x)
x = M()
}
func f(x: borrowing M) {
clodger({ borrow(x) }, borrow: x)
}
func g(x: inout M) {
clodger({ mutate(&x) }, // expected-error {{overlapping accesses to 'x', but modification requires exclusive access}}}
borrow: x) // expected-note {{conflicting access is here}}
}
func h(x: inout M) { // expected-error {{'x' used after consume}}
clodger({ mutate(&x) }, // expected-note {{conflicting access is here}}
// expected-note @-1 {{used here}}
consume: x) // expected-error {{overlapping accesses to 'x', but deinitialization requires exclusive access}}}
// expected-note @-1 {{consumed here}}
x = M()
}
func i(x: inout M) {
clodger({ mutate(&x) }, // expected-note {{conflicting access is here}}
mutate: &x) // expected-error {{overlapping accesses to 'x', but modification requires exclusive access}}}
}
// Multiple closures are allowed to capture the same inout binding concurrently.
// Restrictions in the callee prevent them from being executed simultaneously.
func j(x: inout M) {
clodger({ mutate(&x) }, and: { mutate(&x) })
}
func k(x: borrowing M) {
clodger({ borrow(x) }, and: { borrow(x) })
borrow(x)
}
func l(x: inout M) { // expected-error {{missing reinitialization of closure capture 'x' after consume}}
clodger({ consume(x) }) // expected-note {{consumed here}}
}
func m(x: inout M) { // expected-error {{'x' used after consume}}
consume(x) // expected-note {{consumed here}}
clodger({ borrow(x) }) // expected-note {{used here}}
}
func n(x: inout M) { // expected-error {{'x' used after consume}}
consume(x) // expected-note {{consumed here}}
clodger({ // expected-note {{used here}}
mutate(&x)
})
}
func o(x: inout M) {
clodger({ consume(x); x = M() })
}
func p(x: inout M) {
consume(x)
x = M()
clodger({ consume(x); x = M() })
}
func takesClosureWithArg(_: (Int) -> ()) {}
func invokesWithClosureWithArg() {
let m = M()
takesClosureWithArg { _ in
m.borrow()
}
m.borrow()
}
// need test cases for:
// - capturing local let
// - capturing local var
// - capture list binding can't be consumed
// - andy's bookmarked test cases
// - nested closure captures
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