| // run-pass |
| // See Issues #20055 and #21695. |
| |
| // We are checking here that the temporaries `Box<[i8, k]>`, for `k` |
| // in 1, 2, 3, 4, that are induced by the match expression are |
| // properly handled, in that only *one* will be initialized by |
| // whichever arm is run, and subsequently dropped at the end of the |
| // statement surrounding the `match`. |
| |
| trait Boo { |
| fn dummy(&self) { } |
| } |
| |
| impl Boo for [i8; 1] { } |
| impl Boo for [i8; 2] { } |
| impl Boo for [i8; 3] { } |
| impl Boo for [i8; 4] { } |
| |
| pub fn foo(box_1: fn () -> Box<[i8; 1]>, |
| box_2: fn () -> Box<[i8; 2]>, |
| box_3: fn () -> Box<[i8; 3]>, |
| box_4: fn () -> Box<[i8; 4]>, |
| ) { |
| println!("Hello World 1"); |
| let _: Box<dyn Boo> = match 3 { |
| 1 => box_1(), |
| 2 => box_2(), |
| 3 => box_3(), |
| _ => box_4(), |
| }; |
| println!("Hello World 2"); |
| } |
| |
| pub fn main() { |
| fn box_1() -> Box<[i8; 1]> { Box::new( [1; 1] ) } |
| fn box_2() -> Box<[i8; 2]> { Box::new( [1; 2] ) } |
| fn box_3() -> Box<[i8; 3]> { Box::new( [1; 3] ) } |
| fn box_4() -> Box<[i8; 4]> { Box::new( [1; 4] ) } |
| |
| foo(box_1, box_2, box_3, box_4); |
| } |
