39 lines
805 B
Rust
39 lines
805 B
Rust
use std::cmp::PartialEq;
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use std::ops::{Add, Sub, Mul};
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pub trait MyNum : Add<Output=Self> + Sub<Output=Self> + Mul<Output=Self> + PartialEq + Clone {
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}
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#[derive(Clone, Debug)]
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pub struct MyInt {
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pub val: isize
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}
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impl Add for MyInt {
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type Output = MyInt;
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fn add(self, other: MyInt) -> MyInt { mi(self.val + other.val) }
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}
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impl Sub for MyInt {
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type Output = MyInt;
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fn sub(self, other: MyInt) -> MyInt { mi(self.val - other.val) }
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}
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impl Mul for MyInt {
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type Output = MyInt;
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fn mul(self, other: MyInt) -> MyInt { mi(self.val * other.val) }
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}
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impl PartialEq for MyInt {
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fn eq(&self, other: &MyInt) -> bool { self.val == other.val }
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fn ne(&self, other: &MyInt) -> bool { !self.eq(other) }
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}
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impl MyNum for MyInt {}
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fn mi(v: isize) -> MyInt { MyInt { val: v } }
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