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
|
#![feature(type_changing_struct_update)]
#![allow(incomplete_features)]
#[derive(Clone)]
struct Machine<'a, S> {
state: S,
lt_str: &'a str,
common_field: i32,
}
#[derive(Clone)]
struct State1;
#[derive(Clone)]
struct State2;
fn update_to_state2() {
let s = String::from("hello");
let m1: Machine<State1> = Machine {
state: State1,
lt_str: &s,
//~^ ERROR `s` does not live long enough [E0597]
// FIXME: The error here actually comes from line 34. The
// span of the error message should be corrected to line 34
common_field: 2,
};
// update lifetime
let m3: Machine<'static, State1> = Machine {
lt_str: "hello, too",
..m1.clone()
};
// update lifetime and type
let m4: Machine<'static, State2> = Machine {
state: State2,
lt_str: "hello, again",
..m1.clone()
};
// updating to `static should fail.
let m2: Machine<'static, State1> = Machine {
..m1
};
}
fn main() {}
|
