Comment by Ygg2

As far I understand the RFC won't allow for `Array[Y, N]` (or `Array<T, N>` in Rust parlance) note eddyb's comment:

     Note that all of this should allow impl<T, const N: usize> Trait for [T; N] {...}, 
     but not actually passing a constant expression to a type/function, e.g. ArrayVec<T, 3>.

What I'm actually looking is `Array<Y, size_of::<T>>` for support for data structures that vary depending on size of `T`.