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// RUN: %target-swift-frontend %s -emit-sil \
// RUN: -o /dev/null \
// RUN: -verify \
// RUN: -sil-verify-all \
// RUN: -module-name test \
// RUN: -enable-experimental-feature LifetimeDependence
// REQUIRES: swift_in_compiler
// REQUIRES: swift_feature_LifetimeDependence
struct BV : ~Escapable {
let p: UnsafeRawPointer
let i: Int
@lifetime(borrow p)
init(_ p: UnsafeRawPointer, _ i: Int) {
self.p = p
self.i = i
}
}
struct NC : ~Copyable {
let p: UnsafeRawPointer
let i: Int
init(_ p: UnsafeRawPointer, _ i: Int) {
self.p = p
self.i = i
}
@lifetime(borrow self)
borrowing func getBV() -> BV {
BV(p, i)
}
borrowing func getEmpty() -> Empty {
Empty()
}
}
// Test dependencies on an empty struct.
public struct Empty: ~Escapable {}
func use(e: Empty) {}
struct NE : ~Escapable {
let p: UnsafeRawPointer
let i: Int
@lifetime(borrow p)
init(_ p: UnsafeRawPointer, _ i: Int) {
self.p = p
self.i = i
}
@lifetime(borrow self)
borrowing func getBV() -> BV {
BV(p, i)
}
}
func bv_get_consume(container: consuming NE) -> BV {
return container.getBV() // expected-error {{lifetime-dependent value escapes its scope}}
// expected-note @-1{{it depends on this scoped access to variable 'container'}}
// expected-note @-2{{this use causes the lifetime-dependent value to escape}}
}
struct Wrapper : ~Escapable {
let bv: BV
}
@lifetime(bv2)
func bv_incorrect_annotation1(_ bv1: borrowing BV, _ bv2: borrowing BV) -> BV { // expected-error {{lifetime-dependent variable 'bv1' escapes its scope}}
return copy bv1 // expected-note @-1{{it depends on the lifetime of argument 'bv1'}}
} // expected-note @-1{{this use causes the lifetime-dependent value to escape}}
@lifetime(w2)
func bv_incorrect_annotation2(_ w1: borrowing Wrapper, _ w2: borrowing Wrapper) -> BV { // expected-error {{lifetime-dependent variable 'w1' escapes its scope}}
return w1.bv // expected-note @-1{{it depends on the lifetime of argument 'w1'}}
} // expected-note @-1{{this use causes the lifetime-dependent value to escape}}
let ptr = UnsafeRawPointer(bitPattern: 1)!
let nc = NC(ptr, 0) // expected-error {{lifetime-dependent variable 'nc' escapes its scope}}
func bv_global(dummy: BV) -> BV {
nc.getBV()
} // expected-note {{this use causes the lifetime-dependent value to escape}}
func testEmpty(nc: consuming NC) {
var e: Empty // expected-error {{lifetime-dependent variable 'e' escapes its scope}}
do {
let inner = nc // expected-note {{it depends on the lifetime of variable 'inner'}}
e = inner.getEmpty()
}
use(e: e) // expected-note {{this use of the lifetime-dependent value is out of scope}}
}
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