rust/tests/ui/traits/objects-owned-object-borrowed-method-headerless.rs
2023-01-11 09:32:08 +00:00

31 lines
652 B
Rust

// run-pass
// Test invoked `&self` methods on owned objects where the values
// closed over do not contain managed values, and thus the boxes do
// not have headers.
trait FooTrait {
fn foo(&self) -> usize;
}
struct BarStruct {
x: usize
}
impl FooTrait for BarStruct {
fn foo(&self) -> usize {
self.x
}
}
pub fn main() {
let foos: Vec<Box<dyn FooTrait>> = vec![
Box::new(BarStruct{ x: 0 }) as Box<dyn FooTrait>,
Box::new(BarStruct{ x: 1 }) as Box<dyn FooTrait>,
Box::new(BarStruct{ x: 2 }) as Box<dyn FooTrait>,
];
for i in 0..foos.len() {
assert_eq!(i, foos[i].foo());
}
}