dense vector expand example.scala

  @expand
  @expand.exclude(Complex, OpMod)
  @expand.exclude(BigInt, OpPow)
  @expand.valify
  implicit def dv_dv_Op[@expand.args(Int, Double, Float, Long, BigInt, Complex) T,
  @expand.args(OpAdd, OpSub, OpMulScalar, OpDiv, OpSet, OpMod, OpPow) Op <: OpType]
  (implicit @expand.sequence[Op]({_ + _},  {_ - _}, {_ * _}, {_ / _}, {(a,b) => b}, {_ % _}, {_ pow _})
  op: BinaryOp[T, T, Op, T]):BinaryOp[DenseVector[T], DenseVector[T], Op, DenseVector[T]] = {
    new BinaryOp[DenseVector[T], DenseVector[T], Op, DenseVector[T]] {
      def apply(a: DenseVector[T], b: DenseVector[T]): DenseVector[T] = {
        val ad = a.data
        val bd = b.data
        var aoff = a.offset
        var boff = b.offset
        val result = DenseVector.zeros[T](a.length)
        val rd = result.data

        var i = 0
        while(i < a.length) {
          rd(i) = op(ad(aoff), bd(boff))
          aoff += a.stride
          boff += b.stride
          i += 1
        }
        result
      }
      implicitly[BinaryRegistry[Vector[T], Vector[T], Op, Vector[T]]].register(this)
    }
  }