buf_read from hell

hell.rs

pub fn buf_read<R1, R2, P>(p3b: R1, simgeo: R2, frame: usize) -> Result<Array3D<P>>
    where R1: BufRead + Seek,
          R2: BufRead + Seek,
          P: for<'a> Phases<'a> + Zero + Clone,
          for<'a> <P as Phases<'a>>::Phase: FromPrimitive + Zero + Clone
{
    ...
}