Macros for easy operator overloading.
This library is forked from the original impl_ops by brianwp3000.
This library makes writing multiple impl std::ops::<op>
blocks much faster, especially when you want operators defined for both owned and borrowed variants of the inputs.
To use, import the macros with use auto_ops::*;
. Remember that you can only overload operators between one or more types defined in the current crate (respecting Rust orphan rules).
```rust use auto_ops::*;
struct DonkeyKong { pub bananas: i32, } impl DonkeyKong { pub fn new(bananas: i32) -> DonkeyKong { DonkeyKong { bananas: bananas } } }
implopex!(+ |a: &DonkeyKong, b: &DonkeyKong| -> DonkeyKong { DonkeyKong::new(a.bananas + b.bananas) }); implopex!(+= |a: &mut DonkeyKong, b: &DonkeyKong| { a.bananas += b.bananas });
fn main() { asserteq!(DonkeyKong::new(5), DonkeyKong::new(4) + DonkeyKong::new(1)); asserteq!(DonkeyKong::new(5), DonkeyKong::new(4) + &DonkeyKong::new(1)); asserteq!(DonkeyKong::new(5), &DonkeyKong::new(4) + DonkeyKong::new(1)); asserteq!(DonkeyKong::new(5), &DonkeyKong::new(4) + &DonkeyKong::new(1));
let mut dk = DonkeyKong::new(4);
dk += DonkeyKong::new(1);
dk += &DonkeyKong::new(1);
assert_eq!(DonkeyKong::new(6), dk);
} ```
With Rust lifetime inference changes, implementations for generic (over types and lifetimes) impls are being worked on.