rust/tests/ui/issues/issue-15571.rs
2023-01-11 09:32:08 +00:00

58 lines
1.1 KiB
Rust

// run-pass
fn match_on_local() {
let mut foo: Option<Box<_>> = Some(Box::new(5));
match foo {
None => {},
Some(x) => {
foo = Some(x);
}
}
println!("'{}'", foo.unwrap());
}
fn match_on_arg(mut foo: Option<Box<i32>>) {
match foo {
None => {}
Some(x) => {
foo = Some(x);
}
}
println!("'{}'", foo.unwrap());
}
fn match_on_binding() {
match Some(Box::new(7)) {
mut foo => {
match foo {
None => {},
Some(x) => {
foo = Some(x);
}
}
println!("'{}'", foo.unwrap());
}
}
}
fn match_on_upvar() {
let mut foo: Option<Box<_>> = Some(Box::new(8));
let f = move|| {
match foo {
None => {},
Some(x) => {
foo = Some(x);
}
}
println!("'{}'", foo.unwrap());
};
f();
}
fn main() {
match_on_local();
match_on_arg(Some(Box::new(6)));
match_on_binding();
match_on_upvar();
}