mirror of
https://github.com/rust-lang/rust.git
synced 2024-12-05 05:04:24 +00:00
42 lines
1.1 KiB
Rust
42 lines
1.1 KiB
Rust
// 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);
|
|
}
|