File: moveonly_escaping_capture.swift

package info (click to toggle)
swiftlang 6.0.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 2,519,992 kB
  • sloc: cpp: 9,107,863; ansic: 2,040,022; asm: 1,135,751; python: 296,500; objc: 82,456; f90: 60,502; lisp: 34,951; pascal: 19,946; sh: 18,133; perl: 7,482; ml: 4,937; javascript: 4,117; makefile: 3,840; awk: 3,535; xml: 914; fortran: 619; cs: 573; ruby: 573
file content (50 lines) | stat: -rw-r--r-- 1,161 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
// RUN: %target-run-simple-swift | %FileCheck %s
// REQUIRES: executable_test
// TODO: SIL optimizations cause a miscompile of deinit rdar://105798769
// REQUIRES: swift_test_mode_optimize_none

class C {
    var value: Int
    init(value: Int) { self.value = value }

    deinit { print("C died \(value)") }
}

@_moveOnly
struct Butt {
    static var myButt: () -> () = {}

    init(value: Int) { self._value = C(value: value) }

    // TODO: work around crash when move-only type has a deinit and no
    // nontrivial fields by putting a class here

    // TODO: work around crash when we export a setter from a move-only type
    // by making this stored property private
    private var _value: C

    var value: Int { return _value.value }

    deinit { print("Butt died \(value)") }
}

func foo() {
    let butt = Butt(value: 42)

    Butt.myButt = { print(butt.value) }
}

func bar() {
    // CHECK: 42
    Butt.myButt()
    // CHECK-NEXT: done calling
    print("done calling")
    // CHECK-NEXT: Butt died 42
    // CHECK-NEXT: C died 42
    Butt.myButt = {}
    // CHECK-NEXT: done replacing closure
    print("done replacing closure")
}

foo()
bar()