cons_cell 0.1.0

Swiss knife for heterogenous containers
Documentation 
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use crate::cons::{Cons, ConsCell, Nil};

pub trait ForEachFn<Input> {
    fn run(input: Input);
}

pub trait ForEachFns<C: ConsCell> {
    fn for_each(c: C);
}

impl<C: Cons, F> ForEachFns<C> for F
where
    Self: ForEachFn<C::Head>,
    Self: ForEachFns<C::Tail>,
{
    #[inline(always)]
    fn for_each(c: C) {
        let (head, tail) = c.split();
        <Self as ForEachFn<C::Head>>::run(head);
        <Self as ForEachFns<C::Tail>>::for_each(tail);
    }
}

impl<NilSeed, F> ForEachFns<Nil<NilSeed>> for F {
    fn for_each(_c: Nil<NilSeed>) {}
}

pub trait ForEach: ConsCell {
    #[inline(always)]
    fn for_each<F: ForEachFns<Self>>(self) {
        F::for_each(self);
    }
}

impl<C: ConsCell> ForEach for C {}

#[cfg(test)]
mod tests {
    use super::*;
    use crate::cons::types::hcons::HNil;
    use std::fmt::Debug;

    struct PrintForEach {}

    impl<T: Debug> ForEachFn<T> for PrintForEach {
        fn run(input: T) {
            dbg!(input);
        }
    }

    #[test]
    fn it_works() {
        let x = HNil::new().extend(1u8).extend(2u16);

        x.for_each::<PrintForEach>();
    }
}