File: issue-52070.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 (31 lines) | stat: -rw-r--r-- 583 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
 
// RUN: %target-run-simple-swift | %FileCheck %s
// REQUIRES: executable_test

// https://github.com/apple/swift/issues/52070

protocol P {
  associatedtype T
  func foo(t: inout T)
}
struct S: P {
  func foo(t: inout () -> Void) {
    t()
    t = { print("new") }
  }
}

func doTheFoo<SomeP: P>(_ p: SomeP, _ value: SomeP.T) -> SomeP.T {
  var mutableValue = value
  p.foo(t: &mutableValue)
  return mutableValue
}

print("START")
let newClosure = doTheFoo(S(), { print("old") })
newClosure()
print("DONE")

// CHECK: START
// CHECK-NEXT: old
// CHECK-NEXT: new
// CHECK-NEXT: DONE