File: issue-60958.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 (36 lines) | stat: -rw-r--r-- 1,090 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
 
// RUN: %target-swift-frontend -emit-silgen %s | %FileCheck %s

// https://github.com/apple/swift/issues/60958
// Make sure that `makeIterator` witness is picked over the non-witness.

struct S: Sequence {
  private var _storage: [UInt8] = []

  func makeIterator() -> Array<UInt8>.Iterator {
    _storage.makeIterator()
  }

  typealias Element = UInt8

  class Iterator: IteratorProtocol {
    func next() -> UInt8? { 0 }
    typealias Element = UInt8
  }

  func makeIterator() -> Iterator {
    Iterator()
  }
}

extension S {
  // CHECK: sil hidden [ossa] @$s4main1SV1fyyF
  func f() {
    for elt in self {
      // CHECK: [[ITERATOR_VAR:%.*]] = project_box {{.*}} : ${ var S.Iterator }, 0
      // CHECK: [[MAKE_ITERATOR_REF:%.*]] = function_ref @$s4main1SV12makeIteratorAC0C0CyF : $@convention(method) (@guaranteed S) -> @owned S.Iterator
      // CHECK-NEXT: [[ITERATOR:%.*]] = apply [[MAKE_ITERATOR_REF]](%0) : $@convention(method) (@guaranteed S) -> @owned S.Iterator
      // CHECK-NEXT: store [[ITERATOR]] to [init] [[ITERATOR_VAR]] : $*S.Iterator
      print(elt)
    }
  }
}