impl_ops 0.1.1

Macros for easy operator overloading.
Documentation 
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//#![feature(trace_macros)]
//trace_macros!(true);

#[macro_use]
extern crate impl_ops;

use std::ops;

mod kong {
    #[derive(Clone, Copy, Debug, Default, PartialEq)]
    pub struct Barrel<T> {
        pub bananas: T,
    }

    impl<T> Barrel<T> {
        pub fn new(bananas: T) -> Barrel<T> {
            Barrel { bananas }
        }
    }

    #[derive(Clone, Copy, Debug, Default, PartialEq)]
    pub struct Donkey {
        pub bananas: i32,
    }

    impl Donkey {
        pub fn new(bananas: i32) -> Donkey {
            Donkey { bananas }
        }
    }

    #[derive(Clone, Copy, Debug, Default, PartialEq)]
    pub struct Diddy {
        pub bananas: i32,
    }

    impl Diddy {
        pub fn new(bananas: i32) -> Diddy {
            Diddy { bananas }
        }
    }

    #[derive(Clone, Copy, Debug, Default, PartialEq)]
    pub struct Dixie {
        pub bananas: i32,
    }

    impl Dixie {
        pub fn new(bananas: i32) -> Dixie {
            Dixie { bananas }
        }
    }
}

mod impl_op_operators {
    use super::*;

    impl_op!(+ |a: kong::Donkey, b: kong::Diddy| -> kong::Dixie { kong::Dixie::new(a.bananas + b.bananas) });
    #[test]
    fn add() {
        assert_eq!(kong::Dixie::new(1 + 2), kong::Donkey::new(1) + kong::Diddy::new(2));
    }

    impl_op!(- |a: kong::Donkey, b: kong::Diddy| -> kong::Dixie { kong::Dixie::new(a.bananas - b.bananas) });
    #[test]
    fn sub() {
        assert_eq!(kong::Dixie::new(1 - 2), kong::Donkey::new(1) - kong::Diddy::new(2));
    }

    impl_op!(* |a: kong::Donkey, b: kong::Diddy| -> kong::Dixie { kong::Dixie::new(a.bananas * b.bananas) });
    #[test]
    fn mul() {
        assert_eq!(kong::Dixie::new(1 * 2), kong::Donkey::new(1) * kong::Diddy::new(2));
    }

    impl_op!(/ |a: kong::Donkey, b: kong::Diddy| -> kong::Dixie { kong::Dixie::new(a.bananas / b.bananas) });
    #[test]
    fn div() {
        assert_eq!(kong::Dixie::new(1 / 2), kong::Donkey::new(1) / kong::Diddy::new(2));
    }
    impl_op!(% |a: kong::Donkey, b: kong::Diddy| -> kong::Dixie { kong::Dixie::new(a.bananas % b.bananas) });
    #[test]
    fn rem() {
        assert_eq!(kong::Dixie::new(1 % 2), kong::Donkey::new(1) % kong::Diddy::new(2));
    }

    impl_op!(& |a: kong::Donkey, b: kong::Diddy| -> kong::Dixie { kong::Dixie::new(a.bananas & b.bananas) });
    #[test]
    fn bitand() {
        assert_eq!(kong::Dixie::new(1 & 2), kong::Donkey::new(1) & kong::Diddy::new(2));
    }
    impl_op!(| |a: kong::Donkey, b: kong::Diddy| -> kong::Dixie { kong::Dixie::new(a.bananas | b.bananas) });
    #[test]
    fn bitor() {
        assert_eq!(kong::Dixie::new(1 | 2), kong::Donkey::new(1) | kong::Diddy::new(2));
    }
    impl_op!(^ |a: kong::Donkey, b: kong::Diddy| -> kong::Dixie { kong::Dixie::new(a.bananas ^ b.bananas) });
    #[test]
    fn bitxor() {
        assert_eq!(kong::Dixie::new(1 ^ 2), kong::Donkey::new(1) ^ kong::Diddy::new(2));
    }

    impl_op!(<< |a: kong::Donkey, b: kong::Diddy| -> kong::Dixie { kong::Dixie::new(a.bananas << b.bananas) });
    #[test]
    fn shl() {
        assert_eq!(kong::Dixie::new(1 << 2), kong::Donkey::new(1) << kong::Diddy::new(2));
    }
    impl_op!(>> |a: kong::Donkey, b: kong::Diddy| -> kong::Dixie { kong::Dixie::new(a.bananas >> b.bananas) });
    #[test]
    fn shr() {
        assert_eq!(kong::Dixie::new(1 >> 2), kong::Donkey::new(1) >> kong::Diddy::new(2));
    }
}

mod impl_op_variants {
    use super::*;

    impl_op!(- |a: kong::Diddy, b: kong::Dixie| -> kong::Donkey { kong::Donkey::new(a.bananas - b.bananas) });
    #[test]
    fn owned_owned() {
        assert_eq!(kong::Donkey::new(1 - 2), kong::Diddy::new(1) - kong::Dixie::new(2));
    }

    impl_op!(- |a: kong::Diddy, b: &kong::Dixie| -> kong::Donkey { kong::Donkey::new(a.bananas - b.bananas) });
    #[test]
    fn owned_borrowed() {
        assert_eq!(kong::Donkey::new(1 - 2), kong::Diddy::new(1) - &kong::Dixie::new(2));
    }

    impl_op!(- |a: &kong::Diddy, b: kong::Dixie| -> kong::Donkey { kong::Donkey::new(a.bananas - b.bananas) });
    #[test]
    fn borrowed_owned() {
        assert_eq!(kong::Donkey::new(1 - 2), &kong::Diddy::new(1) - kong::Dixie::new(2));
    }

    impl_op!(- |a: &kong::Diddy, b: &kong::Dixie| -> kong::Donkey { kong::Donkey::new(a.bananas - b.bananas) });
    #[test]
    fn borrowed_borrowed() {
        assert_eq!(kong::Donkey::new(1 - 2), &kong::Diddy::new(1) - &kong::Dixie::new(2));
    }
}

mod impl_op_commutative_variants {
    use super::*;

    impl_op_commutative!(+ |a: kong::Diddy, b: kong::Dixie| -> kong::Donkey { kong::Donkey::new(a.bananas + b.bananas) });
    #[test]
    fn owned_owned() {
        assert_eq!(kong::Donkey::new(1 + 2), kong::Diddy::new(1) + kong::Dixie::new(2));
        assert_eq!(kong::Donkey::new(2 + 1), kong::Dixie::new(1) + kong::Diddy::new(2));
    }

    impl_op_commutative!(+ |a: kong::Diddy, b: &kong::Dixie| -> kong::Donkey { kong::Donkey::new(a.bananas + b.bananas) });
    #[test]
    fn owned_borrowed() {
        assert_eq!(kong::Donkey::new(1 + 2), kong::Diddy::new(1) + &kong::Dixie::new(2));
        assert_eq!(kong::Donkey::new(2 + 1), &kong::Dixie::new(1) + kong::Diddy::new(2));
    }

    impl_op_commutative!(* |a: &kong::Diddy, b: kong::Dixie| -> kong::Donkey { kong::Donkey::new(a.bananas * b.bananas) });
    #[test]
    fn borrowed_owned() {
        assert_eq!(kong::Donkey::new(1 * 2), &kong::Diddy::new(1) * kong::Dixie::new(2));
        assert_eq!(kong::Donkey::new(2 * 1), kong::Dixie::new(1) * &kong::Diddy::new(2));
    }

    impl_op_commutative!(* |a: &kong::Diddy, b: &kong::Dixie| -> kong::Donkey { kong::Donkey::new(a.bananas * b.bananas) });
    #[test]
    fn borrowed_borrowed() {
        assert_eq!(kong::Donkey::new(1 * 2), &kong::Diddy::new(1) * &kong::Dixie::new(2));
        assert_eq!(kong::Donkey::new(2 * 1), &kong::Dixie::new(1) * &kong::Diddy::new(2));
    }
}

mod impl_op_ex_variants {
    use super::*;

    impl_op_ex!(/ |a: kong::Diddy, b: kong::Dixie| -> kong::Donkey { kong::Donkey::new(a.bananas / b.bananas) });
    #[test]
    fn owned_owned() {
        assert_eq!(kong::Donkey::new(1 / 2), kong::Diddy::new(1) / kong::Dixie::new(2));
    }

    impl_op_ex!(% |a: kong::Diddy, b: &kong::Dixie| -> kong::Donkey { kong::Donkey::new(a.bananas % b.bananas) });
    #[test]
    fn owned_borrowed() {
        assert_eq!(kong::Donkey::new(1 % 2), kong::Diddy::new(1) % &kong::Dixie::new(2));
        assert_eq!(kong::Donkey::new(1 % 2), kong::Diddy::new(1) % kong::Dixie::new(2));
    }

    impl_op_ex!(& |a: &kong::Diddy, b: kong::Dixie| -> kong::Donkey { kong::Donkey::new(a.bananas & b.bananas) });
    #[test]
    fn borrowed_owned() {
        assert_eq!(kong::Donkey::new(1 & 2), &kong::Diddy::new(1) & kong::Dixie::new(2));
        assert_eq!(kong::Donkey::new(1 & 2), kong::Diddy::new(1) & kong::Dixie::new(2));
    }

    impl_op_ex!(| |a: &kong::Diddy, b: &kong::Dixie| -> kong::Donkey { kong::Donkey::new(a.bananas | b.bananas) });
    #[test]
    fn borrowed_borrowed() {
        assert_eq!(kong::Donkey::new(1 | 2), &kong::Diddy::new(1) | &kong::Dixie::new(2));
        assert_eq!(kong::Donkey::new(1 | 2), &kong::Diddy::new(1) | kong::Dixie::new(2));
        assert_eq!(kong::Donkey::new(1 | 2), kong::Diddy::new(1) | &kong::Dixie::new(2));
        assert_eq!(kong::Donkey::new(1 | 2), kong::Diddy::new(1) | kong::Dixie::new(2));
    }
}

mod impl_op_ex_commutative_variants {
    use super::*;

    impl_op_ex_commutative!(+ |a: kong::Donkey, b: kong::Dixie| -> kong::Diddy { kong::Diddy::new(a.bananas + b.bananas) });
    #[test]
    fn owned_owned_ex_commutative() {
        assert_eq!(kong::Diddy::new(1 + 2), kong::Donkey::new(1) + kong::Dixie::new(2));
        assert_eq!(kong::Diddy::new(2 + 1), kong::Dixie::new(1) + kong::Donkey::new(2));
    }

    impl_op_ex_commutative!(* |a: kong::Donkey, b: &kong::Dixie| -> kong::Diddy { kong::Diddy::new(a.bananas * b.bananas) });
    #[test]
    fn owned_borrowed() {
        assert_eq!(kong::Diddy::new(1 * 2), kong::Donkey::new(1) * &kong::Dixie::new(2));
        assert_eq!(kong::Diddy::new(1 * 2), kong::Donkey::new(1) * kong::Dixie::new(2));

        assert_eq!(kong::Diddy::new(2 * 1), &kong::Dixie::new(1) * kong::Donkey::new(2));
        assert_eq!(kong::Diddy::new(2 * 1), kong::Dixie::new(1) * kong::Donkey::new(2));
    }

    impl_op_ex_commutative!(& |a: &kong::Donkey, b: kong::Dixie| -> kong::Diddy { kong::Diddy::new(a.bananas & b.bananas) });
    #[test]
    fn borrowed_owned() {
        assert_eq!(kong::Diddy::new(1 & 2), &kong::Donkey::new(1) & kong::Dixie::new(2));
        assert_eq!(kong::Diddy::new(1 & 2), kong::Donkey::new(1) & kong::Dixie::new(2));

        assert_eq!(kong::Diddy::new(2 & 1), kong::Dixie::new(1) & &kong::Donkey::new(2));
        assert_eq!(kong::Diddy::new(2 & 1), kong::Dixie::new(1) & kong::Donkey::new(2));
    }

    impl_op_ex_commutative!(| |a: &kong::Donkey, b: &kong::Dixie| -> kong::Diddy { kong::Diddy::new(a.bananas | b.bananas) });
    #[test]
    fn borrowed_borrowed() {
        assert_eq!(kong::Diddy::new(1 | 2), &kong::Donkey::new(1) | &kong::Dixie::new(2));
        assert_eq!(kong::Diddy::new(1 | 2), &kong::Donkey::new(1) | kong::Dixie::new(2));
        assert_eq!(kong::Diddy::new(1 | 2), kong::Donkey::new(1) | &kong::Dixie::new(2));
        assert_eq!(kong::Diddy::new(1 | 2), kong::Donkey::new(1) | kong::Dixie::new(2));

        assert_eq!(kong::Diddy::new(2 | 1), &kong::Dixie::new(1) | &kong::Donkey::new(2));
        assert_eq!(kong::Diddy::new(2 | 1), kong::Dixie::new(1) | &kong::Donkey::new(2));
        assert_eq!(kong::Diddy::new(2 | 1), &kong::Dixie::new(1) | kong::Donkey::new(2));
        assert_eq!(kong::Diddy::new(2 | 1), kong::Dixie::new(1) | kong::Donkey::new(2));
    }
}

mod generics {
    use super::*;

    impl_op!(+ |a: kong::Barrel<i32>, b: kong::Barrel<u32>| -> kong::Barrel<f32> { kong::Barrel::new((a.bananas + b.bananas as i32) as f32) });
    #[test]
    fn impl_op() {
        assert_eq!(kong::Barrel::new((1 + 2) as f32), kong::Barrel::new(1) + kong::Barrel::new(2u32));
    }

    impl_op_commutative!(* |a: kong::Barrel<i32>, b: kong::Barrel<u32>| -> kong::Barrel<f32> { kong::Barrel::new((a.bananas * b.bananas as i32) as f32) });
    #[test]
    fn impl_op_commutative() {
        assert_eq!(kong::Barrel::new((1 * 2) as f32), kong::Barrel::new(1) * kong::Barrel::new(2u32));
        assert_eq!(kong::Barrel::new((2 * 1) as f32), kong::Barrel::new(1u32) * kong::Barrel::new(2));
    }

    impl_op_ex!(- |a: &kong::Barrel<i32>, b: &kong::Barrel<u32>| -> kong::Barrel<f32> { kong::Barrel::new((a.bananas - b.bananas as i32) as f32) });
    #[test]
    fn impl_op_ex() {
        assert_eq!(kong::Barrel::new((1 - 2) as f32), kong::Barrel::new(1) - kong::Barrel::new(2u32));
        assert_eq!(kong::Barrel::new((1 - 2) as f32), kong::Barrel::new(1) - &kong::Barrel::new(2u32));
        assert_eq!(kong::Barrel::new((1 - 2) as f32), &kong::Barrel::new(1) - kong::Barrel::new(2u32));
        assert_eq!(kong::Barrel::new((1 - 2) as f32), &kong::Barrel::new(1) - &kong::Barrel::new(2u32));
    }

    impl_op_ex_commutative!(& |a: &kong::Barrel<i32>, b: &kong::Barrel<u32>| -> kong::Barrel<f32> { kong::Barrel::new((a.bananas & b.bananas as i32) as f32) });
    #[test]
    fn impl_op_ex_commutative() {
        assert_eq!(kong::Barrel::new((1 & 2) as f32), kong::Barrel::new(1) & kong::Barrel::new(2u32));
        assert_eq!(kong::Barrel::new((1 & 2) as f32), kong::Barrel::new(1) & &kong::Barrel::new(2u32));
        assert_eq!(kong::Barrel::new((1 & 2) as f32), &kong::Barrel::new(1) & kong::Barrel::new(2u32));
        assert_eq!(kong::Barrel::new((1 & 2) as f32), &kong::Barrel::new(1) & &kong::Barrel::new(2u32));

        assert_eq!(kong::Barrel::new((2 & 1) as f32), kong::Barrel::new(1u32) & kong::Barrel::new(2));
        assert_eq!(kong::Barrel::new((2 & 1) as f32), kong::Barrel::new(1u32) & &kong::Barrel::new(2));
        assert_eq!(kong::Barrel::new((2 & 1) as f32), &kong::Barrel::new(1u32) & kong::Barrel::new(2));
        assert_eq!(kong::Barrel::new((2 & 1) as f32), &kong::Barrel::new(1u32) & &kong::Barrel::new(2));
    }
}

mod multiline {
    use super::*;

    impl_op!(- |a: kong::Donkey, b: kong::Barrel<i32>| -> kong::Donkey { 
        let ret = kong::Donkey::new(a.bananas - b.bananas);
        ret 
    });
    #[test]
    fn impl_op() {
        assert_eq!(kong::Donkey::new(1 - 2), kong::Donkey::new(1) - kong::Barrel::new(2));
    }

    impl_op_commutative!(+ |a: kong::Donkey, b: kong::Barrel<i32>| -> kong::Donkey { 
        let ret = kong::Donkey::new(a.bananas + b.bananas);
        ret 
    });
    #[test]
    fn impl_op_commutative() {
        assert_eq!(kong::Donkey::new(1 + 2), kong::Donkey::new(1) + kong::Barrel::new(2));
        assert_eq!(kong::Donkey::new(2 + 1), kong::Barrel::new(1) + kong::Donkey::new(2));
    }

    impl_op_ex!(/ |a: &kong::Donkey, b: &kong::Barrel<i32>| -> kong::Donkey { 
        let ret = kong::Donkey::new(a.bananas / b.bananas);
        ret
    });
    #[test]
    fn impl_op_ex() {
        assert_eq!(kong::Donkey::new(1 / 2), kong::Donkey::new(1) / kong::Barrel::new(2));
        assert_eq!(kong::Donkey::new(1 / 2), kong::Donkey::new(1) / &kong::Barrel::new(2));
        assert_eq!(kong::Donkey::new(1 / 2), &kong::Donkey::new(1) / kong::Barrel::new(2));
        assert_eq!(kong::Donkey::new(1 / 2), &kong::Donkey::new(1) / &kong::Barrel::new(2));
    }

    impl_op_ex_commutative!(* |a: &kong::Donkey, b: &kong::Barrel<i32>| -> kong::Donkey { 
        let ret = kong::Donkey::new(a.bananas * b.bananas);
        ret
    });
    #[test]
    fn impl_op_ex_commutative() {
        assert_eq!(kong::Donkey::new(1 * 2), kong::Donkey::new(1) * kong::Barrel::new(2));
        assert_eq!(kong::Donkey::new(1 * 2), kong::Donkey::new(1) * &kong::Barrel::new(2));
        assert_eq!(kong::Donkey::new(1 * 2), &kong::Donkey::new(1) * kong::Barrel::new(2));
        assert_eq!(kong::Donkey::new(1 * 2), &kong::Donkey::new(1) * &kong::Barrel::new(2));

        assert_eq!(kong::Donkey::new(2 * 1), kong::Barrel::new(1) * kong::Donkey::new(2));
        assert_eq!(kong::Donkey::new(2 * 1), kong::Barrel::new(1) * &kong::Donkey::new(2));
        assert_eq!(kong::Donkey::new(2 * 1), &kong::Barrel::new(1) * kong::Donkey::new(2));
        assert_eq!(kong::Donkey::new(2 * 1), &kong::Barrel::new(1) * &kong::Donkey::new(2));
    }
}

fn do_bitor(a: &kong::Donkey, b: &kong::Dixie) -> kong::Diddy {
    a | b
}

fn do_bitor_2(a: &kong::Dixie, b: &kong::Donkey) -> kong::Diddy {
    a | b
}

#[test]
fn infer_lifetimes() {
    assert_eq!(kong::Diddy::new(1 | 2), do_bitor(&kong::Donkey::new(1), &kong::Dixie::new(2)));
    assert_eq!(kong::Diddy::new(2 | 1), do_bitor_2(&kong::Dixie::new(1), &kong::Donkey::new(2)));
}