| // run-pass |
| #![feature(box_syntax)] |
| |
| fn match_on_local() { |
| let mut foo: Option<Box<_>> = Some(box 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 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 6)); |
| match_on_binding(); |
| match_on_upvar(); |
| } |