1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
// run-pass
use std::ops::{Add, Sub, Mul};
trait MyNum : Add<Output=Self> + Sub<Output=Self> + Mul<Output=Self> + PartialEq + Clone { }
#[derive(Clone, Debug)]
struct MyInt { val: isize }
impl Add for MyInt {
type Output = MyInt;
fn add(self, other: MyInt) -> MyInt { mi(self.val + other.val) }
}
impl Sub for MyInt {
type Output = MyInt;
fn sub(self, other: MyInt) -> MyInt { mi(self.val - other.val) }
}
impl Mul for MyInt {
type Output = MyInt;
fn mul(self, other: MyInt) -> MyInt { mi(self.val * other.val) }
}
impl PartialEq for MyInt {
fn eq(&self, other: &MyInt) -> bool { self.val == other.val }
fn ne(&self, other: &MyInt) -> bool { !self.eq(other) }
}
impl MyNum for MyInt {}
fn f<T:MyNum>(x: T, y: T) -> (T, T, T) {
return (x.clone() + y.clone(), x.clone() - y.clone(), x * y);
}
fn mi(v: isize) -> MyInt { MyInt { val: v } }
pub fn main() {
let (x, y) = (mi(3), mi(5));
let (a, b, c) = f(x, y);
assert_eq!(a, mi(8));
assert_eq!(b, mi(-2));
assert_eq!(c, mi(15));
}
|
