27 lines
455 B
Rust
27 lines
455 B
Rust
|
pub trait Add<RHS,Result> {
|
||
|
|
pure fn add(rhs: &RHS) -> Result;
|
||
|
|
}
|
||
|
|
|
||
|
|
trait MyNum : Add<self,self> { }
|
||
|
|
|
||
|
|
struct MyInt { val: int }
|
||
|
|
|
||
|
|
impl MyInt : Add<MyInt, MyInt> {
|
||
|
|
pure fn add(other: &MyInt) -> MyInt { mi(self.val + other.val) }
|
||
|
|
}
|
||
|
|
|
||
|
|
impl MyInt : MyNum;
|
||
|
|
|
||
|
|
fn f<T:MyNum>(x: T, y: T) -> T {
|
||
|
|
return x.add(&y);
|
||
|
|
}
|
||
|
|
|
||
|
|
pure fn mi(v: int) -> MyInt { MyInt { val: v } }
|
||
|
|
|
||
|
|
fn main() {
|
||
|
|
let (x, y) = (mi(3), mi(5));
|
||
|
|
let z = f(x, y);
|
||
|
|
assert z.val == 8
|
||
|
|
}
|
||
|
|
|