DragonOS/kernel/crates/intertrait/tests/on-struct.rs

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Rust
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use intertrait::cast::*;
use intertrait::*;
#[cast_to(Greet)]
struct Data;
trait Source: CastFrom {}
trait Greet {
fn greet(&self);
}
impl Greet for Data {
fn greet(&self) {
println!("Hello");
}
}
impl Source for Data {}
#[test]
fn test_cast_to_on_struct() {
let data = Data;
let source: &dyn Source = &data;
let greet = source.cast::<dyn Greet>();
greet.unwrap().greet();
}