rust/tests/ui/issues/issue-19367.rs

33 lines
696 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");
}