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
|
// RUN: %target-run-simple-swift | %FileCheck %s
// REQUIRES: executable_test
// REQUIRES: objc_interop
import Foundation
extension NSObject {
@objc func frob() {
print("I've been frobbed!")
}
@objc var asHerself : NSObject {
return self
}
@objc var blackHoleWithHawkingRadiation : NSObject? {
get {
print("e+")
return nil
}
set {
print("e-")
}
}
}
var o = NSObject()
func drop(_ x: NSObject?) {}
// CHECK: true
print(o.responds(to: "frob"))
// CHECK: true
print(o.responds(to: "asHerself"))
// CHECK: false
print(o.responds(to: "setAsHerself:"))
// CHECK: true
print(o.responds(to: "blackHoleWithHawkingRadiation"))
// CHECK: true
print(o.responds(to: "setBlackHoleWithHawkingRadiation:"))
// Test #selector for referring to methods.
// CHECK: true
print(o.responds(to: #selector(NSObject.frob)))
// CHECK: I've been frobbed!
o.frob()
// CHECK: true
print(o === o.asHerself)
// CHECK: e+
drop(o.blackHoleWithHawkingRadiation)
// CHECK: e-
o.blackHoleWithHawkingRadiation = NSObject()
// Use of extensions via bridging
let str = "Hello, world"
// CHECK: I've been frobbed!
str.frob()
|
