File: global_change_size.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 (94 lines) | stat: -rw-r--r-- 1,618 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
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
#if BEFORE

var global: Int = 0

public struct ChangeEmptyToNonEmpty {
  public init() {}

  public var property: Int {
    get { return global }
    set { global = newValue }
  }
}

#else

public struct ChangeEmptyToNonEmpty {
  public init() {
    property = 0 
  }

  public var property: Int
}

#endif


#if BEFORE

public struct ChangeSize {
  public init() {
    count = 0
  }

  public var count: Int

  public func validate() -> Bool {
    return true
  }
}

#else

public struct ChangeSize {
  public init() {
    _count = 0
    _sign = 0
  }

  public var count: Int {
    get { return _count * _sign }
    set {
      if newValue < 0 {
        _count = -newValue
        _sign = -1
      } else {
        _count = newValue
        _sign = 1
      }
    }
  }

  private var _count: Int
  private var _sign: Int

  public func validate() -> Bool {
    return (padding1 == 17 &&
            padding2 == -12 &&
            padding3 == 108 &&
            padding4 == -7592)  
  }

  // Some padding to grow the struct beyond what a fixed-size buffer
  // can hold for a global. Use it as a canary to catch any memory
  // corruption issues.
  public var padding1: Int = 17
  public var padding2: Int = -12
  public var padding3: Int = 108
  public var padding4: Int = -7592
}

#endif

// Test internal global variable hidden behind a public transparent
// interface

@usableFromInline var versionedGlobal: ChangeSize = ChangeSize()

@_transparent public func getVersionedGlobal() -> ChangeSize {
  return versionedGlobal
}

@_transparent public func setVersionedGlobal(_ c: Int) {
  versionedGlobal.count = c
}