bulks 0.11.3

Amazing bulks! They are like iterators, but in bulk, and therefore support collection into arrays.
Documentation 
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use core::{
    mem::{ManuallyDrop, MaybeUninit},
    ops::ControlFlow
};

moddef::moddef!(
    flat(pub) mod {
        array_buffer,
        buffer,
        guard,
        infinite_iterator,
        maybe_done,
        mutator,
        stepper,
        take_one,
        yield_once
    }
);

pub(crate) const fn split_array_ref<T, const N: usize, const M: usize>(array: &[T; N]) -> (&[T; N.min(M)], &[T; N.saturating_sub(M)])
{
    let ptr = array.as_ptr();
    unsafe { (ptr.cast::<[_; _]>().as_ref_unchecked(), ptr.add(N.min(M)).cast::<[_; _]>().as_ref_unchecked()) }
}
pub(crate) const fn split_array_mut<T, const N: usize, const M: usize>(array: &mut [T; N]) -> (&mut [T; N.min(M)], &mut [T; N.saturating_sub(M)])
{
    let ptr = array.as_mut_ptr();
    unsafe { (ptr.cast::<[_; _]>().as_mut_unchecked(), ptr.add(N.min(M)).cast::<[_; _]>().as_mut_unchecked()) }
}
pub(crate) const fn split_array<T, const N: usize, const M: usize>(array: [T; N]) -> ([T; N.min(M)], [T; N.saturating_sub(M)])
{
    #[repr(C)]
    struct Pair<L, R>
    {
        left: L,
        right: R
    }
    #[repr(C)]
    union Split<T, L, R>
    {
        concat: ManuallyDrop<T>,
        split: ManuallyDrop<Pair<L, R>>
    }

    let Pair { left, right } = unsafe {
        ManuallyDrop::into_inner(
            Split {
                concat: ManuallyDrop::new(array)
            }
            .split
        )
    };

    (left, right)
}

pub(crate) macro collect_array_with(|$pusher:ident| $for_each:expr; for $bulk:ty) {{
    use crate::StaticBulk;

    let mut array = MaybeUninit::<<$bulk as StaticBulk>::Array<<$bulk as IntoIterator>::Item>>::uninit();
    let array_mut = unsafe {
        array_trait::AsSlice::as_mut_slice(
            array
                .as_mut_ptr()
                .cast::<<$bulk as StaticBulk>::Array<MaybeUninit<<$bulk as IntoIterator>::Item>>>()
                .as_mut()
                .unwrap()
        )
    };
    let mut guard = Guard { array_mut, initialized: 0..0 };

    struct Closure<'a, 'b, T>
    {
        guard: &'a mut Guard<'b, T>
    }

    const impl<'a, 'b, T> FnOnce<(T,)> for Closure<'a, 'b, T>
    {
        type Output = ();

        extern "rust-call" fn call_once(mut self, args: (T,)) -> Self::Output
        {
            self.call_mut(args)
        }
    }
    const impl<'a, 'b, T> FnMut<(T,)> for Closure<'a, 'b, T>
    {
        extern "rust-call" fn call_mut(&mut self, (x,): (T,)) -> Self::Output
        {
            unsafe {
                self.guard.push_back_unchecked(x);
            }
        }
    }

    let $pusher = Closure { guard: &mut guard };

    $for_each;

    core::mem::forget(guard);
    unsafe { MaybeUninit::assume_init(array) }
}}

pub(crate) macro try_collect_array_with(|$pusher:ident| $try_for_each:expr; for $bulk:ty) {{
    use crate::StaticBulk;
    use core::ops::Try;

    let mut array = MaybeUninit::<<$bulk as StaticBulk>::Array<<<$bulk as IntoIterator>::Item as Try>::Output>>::uninit();
    let array_mut = unsafe {
        array_trait::AsSlice::as_mut_slice(
            array
                .as_mut_ptr()
                .cast::<<$bulk as StaticBulk>::Array<MaybeUninit<<<$bulk as IntoIterator>::Item as Try>::Output>>>()
                .as_mut()
                .unwrap()
        )
    };
    let mut guard = Guard { array_mut, initialized: 0..0 };

    struct Closure<'a, 'b, T>
    where
        T: Try
    {
        guard: &'a mut Guard<'b, <T as Try>::Output>
    }

    const impl<'a, 'b, T> FnOnce<(T,)> for Closure<'a, 'b, T>
    where
        T: [const] Try
    {
        type Output = ControlFlow<<T as Try>::Residual>;

        extern "rust-call" fn call_once(self, (x,): (T,)) -> Self::Output
        {
            unsafe {
                self.guard.push_back_unchecked(x.branch()?);
            }
            ControlFlow::Continue(())
        }
    }
    const impl<'a, 'b, T> FnMut<(T,)> for Closure<'a, 'b, T>
    where
        T: [const] Try
    {
        extern "rust-call" fn call_mut(&mut self, (x,): (T,)) -> Self::Output
        {
            unsafe {
                self.guard.push_back_unchecked(x.branch()?);
            }
            ControlFlow::Continue(())
        }
    }

    let $pusher = Closure { guard: &mut guard };

    match $try_for_each
    {
        ControlFlow::Continue(()) => (),
        ControlFlow::Break(residual) => return core::ops::FromResidual::from_residual(residual)
    }

    core::mem::forget(guard);
    unsafe { MaybeUninit::assume_init(array) }
}}