tupletools 0.1.1

Utility functions for tuples
Documentation 
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#![cfg_attr(not(feature = "use_std"), no_std)]

mod fst;
mod ops;
mod snd;
mod trd;

pub use fst::Fst;
pub use snd::Snd;
pub use trd::Trd;
pub use ops::add::Addition;
pub use ops::div::Division;
pub use ops::mul::Multiply;
pub use ops::sub::Subtraction;

#[cfg(feature = "use_std")]
#[cfg(test)]
mod tests {
    use crate::{Fst, Snd, Addition, Multiply, Subtraction, Division};

    #[test]
    fn fst() {
        let x = vec![(2, 3), (3, 4), (4, 5), (5, 6)];

        let expected = vec![2, 3, 4, 5];
        assert_eq!(
            x.iter().map(Fst::fst).cloned().collect::<Vec<_>>(),
            expected
        );
        assert_eq!(
            x.into_iter().map(Fst::into_fst).collect::<Vec<_>>(),
            expected
        );
    }

    #[test]
    fn snd() {
        let x = vec![(2, 3), (3, 4), (4, 5), (5, 6)];

        let expected = vec![3, 4, 5, 6];
        assert_eq!(
            x.iter().map(Snd::snd).cloned().collect::<Vec<_>>(),
            expected
        );
        assert_eq!(
            x.into_iter().map(Snd::into_snd).collect::<Vec<_>>(),
            expected
        );
    }

    #[test]
    fn add() {
        let x = vec![(1, 2, 1), (1, 1, 1)];
        let y = (1, 1, 1);
        let z = (1, 1, 1);

        assert_eq!(
            y.add(z),
            (2, 2, 2)
        );

        assert_eq!(
            x.into_iter().fold((0,0,0),|a,b| a.add(b)),
            (2,3,2)
        );
    }

    #[test]
    fn mul() {
        let x = vec![(1, 2, 1), (1, 1, 1)];
        let y = (1, 1, 1);
        let z = (1, 1, 1);

        assert_eq!(
            y.mul(z),
            (1, 1, 1)
        );

        assert_eq!(
            x.into_iter().fold((0,0,0),|a,b| a.mul(b)),
            (0,0,0)
        );
    }

    #[test]
    fn sub() {
        let x = vec![(1, 2, 1), (1, 1, 1)];
        let y = (1, 1, 1);
        let z = (1, 1, 1);

        assert_eq!(
            y.sub(z),
            (0, 0, 0)
        );

        assert_eq!(
            x.into_iter().fold((0,0,0),|a,b| a.sub(b)),
            (-2,-3,-2)
        );
    }

    #[test]
    fn div() {
        let x = vec![(1, 2, 1), (1, 1, 1)];
        let y = (1, 1, 1);
        let z = (1, 1, 1);

        assert_eq!(
            y.div(z),
            (1, 1, 1)
        );

        assert_eq!(
            x.into_iter().fold((1,1,1),|a,b| a.div(b)),
            (1,1/2,1)
        );
    }
}