...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::date_time::null_dst_rules — Used for local time adjustments in places that don't use dst.
// In header: <boost/date_time/dst_rules.hpp> template<typename date_type_, typename time_duration_type_> class null_dst_rules { public: // types typedef time_duration_type_ time_duration_type; typedef date_type_ date_type; // public static functions static time_is_dst_result local_is_dst(const date_type &, const time_duration_type &); static time_is_dst_result utc_is_dst(const date_type &, const time_duration_type &); static bool is_dst_boundary_day(date_type); static time_duration_type dst_offset(); };
null_dst_rules
public static functionsstatic time_is_dst_result local_is_dst(const date_type &, const time_duration_type &);Calculates if the given local time is dst or not.
static time_is_dst_result utc_is_dst(const date_type &, const time_duration_type &);Calculates if the given utc time is in dst.
static bool is_dst_boundary_day(date_type);
static time_duration_type dst_offset();