pub fn packed_from_fn_with_offset<P: PackedField>(
offset: usize,
f: impl FnMut(usize) -> P::Scalar,
) -> PExpand description
Construct a packed field element from a function that returns scalar values by index with the
given offset in packed elements. E.g. if offset is 2, and WIDTH is 4, f(9) will be used
to set the scalar at index 1 in the packed element.