Forget the shape

unshaped.jl

        using Base.Iterators
        import Base: done, next, start, length, eltype, iteratorsize, HasShape, HasLength


        struct UnshapedIterator{I}
            it::I
            UnshapedIterator{I}(it::I, a::HasShape) = new{I}(it)
            UnshapedIterator{I}(it::I, a::HasLength) = new{I}(it)
        end

        unshaped(it::I) where {I} = UnshapedIterator{I}(it, iteratorsize(it))


        done(it::UnshapedIterator, s) = done(it.it, s)
        next(it::UnshapedIterator, s) = next(it.it, s)
        start(it::UnshapedIterator) = start(it.it)
        length(it::UnshapedIterator) = length(it.it)
        eltype(it::Type{UnshapedIterator}) = eltype(it.it)
        iteratorsize(::Type{<:UnshapedIterator}) = HasLength()

    
        unshaped(zip(1:3,1:4))