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
|
// RUN: %target-typecheck-verify-swift -disable-availability-checking -enable-experimental-move-only
class Klass {
var k: Klass? = nil
}
func useString(_ x: String) {}
var global: String = "5"
func testGlobal() {
useString(_borrow global)
}
func testLet() {
let t = String()
useString(_borrow t)
}
func testVar() {
var t = String()
t = String()
useString(_borrow t)
}
struct S {
var k = Klass()
func test() {}
func test2() {
(_borrow self).test()
}
}
func useApply() {
var s = S()
s = S()
(_borrow s).test()
}
func testExprFailureLet() {
let t = 5
// Next line is parsed as move(t) + t
let _ = _borrow t + t
// Next line is parsed as move(t+t)
let _ = _borrow (t+t) // expected-error {{'borrow' can only be applied to a local binding ('let', 'var', or parameter)}}
}
func testExprFailureVar() {
var t = 5
t = 5
// Next line is parsed as move(t) + t
let _ = _borrow t + t
// Next line is parsed as move(t+t)
let _ = _borrow (t+t) // expected-error {{'borrow' can only be applied to a local binding ('let', 'var', or parameter)}}
}
func letAddressOnly<T>(_ v: T) {
let t = v
let _ = _borrow t
}
struct StructWithField {
var k: Klass? = nil
}
func testLetStructAccessField() {
let t = StructWithField()
let _ = _borrow t.k
}
func testVarStructAccessField() {
var t = StructWithField()
t = StructWithField()
let _ = _borrow t.k
}
func testLetClassAccessField() {
let t = Klass()
let _ = _borrow t.k
}
func testVarClassAccessField() {
var t = Klass()
t = Klass()
let _ = _borrow t.k // expected-error {{'borrow' can only be applied to a local binding ('let', 'var', or parameter)}}
}
|
