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
95
96
97
98
99
|
//@ check-fail
fn let_underscore(string: &Option<&str>, mut num: Option<i32>) {
let _ = if let Some(s) = *string { s.len() } else { 0 };
let _ = if let Some(s) = &num { s } else { &0 };
let _ = if let Some(s) = &mut num {
*s += 1;
s
} else {
let a = 0;
&a
//~^ ERROR does not live long enough
};
let _ = if let Some(ref s) = num { s } else { &0 };
let _ = if let Some(mut s) = num {
s += 1;
s
} else {
0
};
let _ = if let Some(ref mut s) = num {
*s += 1;
s
} else {
let a = 0;
&a
//~^ ERROR does not live long enough
};
}
fn let_ascribe(string: &Option<&str>, mut num: Option<i32>) {
let _: _ = if let Some(s) = *string { s.len() } else { 0 };
let _: _ = if let Some(s) = &num { s } else { &0 };
let _: _ = if let Some(s) = &mut num {
*s += 1;
s
} else {
let a = 0;
&a
//~^ ERROR does not live long enough
};
let _: _ = if let Some(ref s) = num { s } else { &0 };
let _: _ = if let Some(mut s) = num {
s += 1;
s
} else {
0
};
let _: _ = if let Some(ref mut s) = num {
*s += 1;
s
} else {
let a = 0;
&a
//~^ ERROR does not live long enough
};
}
fn matched(string: &Option<&str>, mut num: Option<i32>) {
match if let Some(s) = *string { s.len() } else { 0 } {
_ => {}
};
match if let Some(s) = &num { s } else { &0 } {
_ => {}
};
match if let Some(s) = &mut num {
*s += 1;
s
} else {
let a = 0;
&a
//~^ ERROR does not live long enough
} {
_ => {}
};
match if let Some(ref s) = num { s } else { &0 } {
_ => {}
};
match if let Some(mut s) = num {
s += 1;
s
} else {
0
} {
_ => {}
};
match if let Some(ref mut s) = num {
*s += 1;
s
} else {
let a = 0;
&a
//~^ ERROR does not live long enough
} {
_ => {}
};
}
fn main() {}
|
