operator+=

Chnages this->offset by rhs as this->get_offset()[0] + rhs

template <typename overloadDependantT, typename >
accessor<elemT, 1, kMode, kTarget, access::placeholder::true_t> & operator+=(int rhs)

1. Chnages this->offset by rhs as this->get_offset()[0] + rhs
   Parameters:
   • int rhs : the offset to add to the current accessor's offset
   Returns: This accesor