deadline_timer.expires_from( boost::posix_timer::seconds(1) )は通るけどsteady_timer.expires_from( boost::posix_timer::seconds(1) )が通らない ._.
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deadline_timer.expires_from( boost::posix_timer::seconds(1) )は通るけどsteady_timer.expires_from( boost::posix_timer::seconds(1) )が通らない ._.