torch_tensor_subtract Function

  function torch_tensor_subtract(tensor1, tensor2) result(output)
    type(torch_tensor), intent(in) :: tensor1
    type(torch_tensor), intent(in) :: tensor2
    type(torch_tensor) :: output

    interface
      function torch_tensor_subtract_c(tensor1_c, tensor2_c) result(output_c)  &
          bind(c, name = 'torch_tensor_subtract')
        use, intrinsic :: iso_c_binding, only : c_ptr
        implicit none
        type(c_ptr), value, intent(in) :: tensor1_c
        type(c_ptr), value, intent(in) :: tensor2_c
        type(c_ptr) :: output_c
      end function torch_tensor_subtract_c
    end interface

    output%p = torch_tensor_subtract_c(tensor1%p, tensor2%p)
  end function torch_tensor_subtract