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
|
// Test that we correctly consider the type of `match` to be the LUB
// of the various arms, particularly in the case where regions are
// involved.
pub fn opt_str0<'a>(maybestr: &'a Option<String>) -> &'a str {
if maybestr.is_none() {
"(none)"
} else {
let s: &'a str = maybestr.as_ref().unwrap();
s
}
}
pub fn opt_str1<'a>(maybestr: &'a Option<String>) -> &'a str {
if maybestr.is_some() {
let s: &'a str = maybestr.as_ref().unwrap();
s
} else {
"(none)"
}
}
pub fn opt_str2<'a>(maybestr: &'a Option<String>) -> &'static str {
if maybestr.is_none() {
"(none)"
} else {
let s: &'a str = maybestr.as_ref().unwrap();
s
//~^ ERROR lifetime may not live long enough
}
}
pub fn opt_str3<'a>(maybestr: &'a Option<String>) -> &'static str {
if maybestr.is_some() {
let s: &'a str = maybestr.as_ref().unwrap();
s
//~^ ERROR lifetime may not live long enough
} else {
"(none)"
}
}
fn main() {}
|
