73 auto product_producer = produce< product_t >(
74 token_p() >> &product_t::product,
77 token_p() >> &product_t::product_version
81 return produce< user_agent_value_t >(
82 product_producer >> &user_agent_value_t::product,
83 produce< std::vector< tail_item_t > >(
88 product_producer >> to_container(),
89 comment_p() >> to_container()
92 ) >> &user_agent_value_t::tail