mirror of https://github.com/rust-lang/rust
39 lines
805 B
Rust
39 lines
805 B
Rust
use std::cmp::PartialEq;
|
|
use std::ops::{Add, Sub, Mul};
|
|
|
|
pub trait MyNum : Add<Output=Self> + Sub<Output=Self> + Mul<Output=Self> + PartialEq + Clone {
|
|
}
|
|
|
|
#[derive(Clone, Debug)]
|
|
pub struct MyInt {
|
|
pub 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 mi(v: isize) -> MyInt { MyInt { val: v } }
|