mirror of
https://github.com/rust-lang/rust.git
synced 2024-12-05 21:24:12 +00:00
33 lines
695 B
Rust
33 lines
695 B
Rust
// run-pass
|
|
struct S {
|
|
o: Option<String>
|
|
}
|
|
|
|
// Make sure we don't reuse the same alloca when matching
|
|
// on field of struct or tuple which we reassign in the match body.
|
|
|
|
fn main() {
|
|
let mut a = (0, Some("right".to_string()));
|
|
let b = match a.1 {
|
|
Some(v) => {
|
|
a.1 = Some("wrong".to_string());
|
|
v
|
|
}
|
|
None => String::new()
|
|
};
|
|
println!("{}", b);
|
|
assert_eq!(b, "right");
|
|
|
|
|
|
let mut s = S{ o: Some("right".to_string()) };
|
|
let b = match s.o {
|
|
Some(v) => {
|
|
s.o = Some("wrong".to_string());
|
|
v
|
|
}
|
|
None => String::new(),
|
|
};
|
|
println!("{}", b);
|
|
assert_eq!(b, "right");
|
|
}
|