CLASS TEMPLAT(3)

NAME
boost::date_time::dst_calc_engine - Compile-time configurable daylight savings time calculation engine.

SYNOPSIS

// In header: <boost/date_time/dst_rules.hpp>
template<typename date_type, typename time_duration_type, typename dst_traits>
class dst_calc_engine {
public:
  // types
  typedef date_type::year_type                            year_type;
  typedef date_type::calendar_type                        calendar_type;
  typedef dst_calculator< date_type, time_duration_type > dstcalc;
  // public static functions
  static time_is_dst_result
  local_is_dst(const date_type &, const time_duration_type &);
  static bool is_dst_boundary_day(date_type);
  static time_duration_type dst_offset();
  static date_type local_dst_start_day(year_type);
  static date_type local_dst_end_day(year_type);
};

DESCRIPTION

  dst_calc_engine public static functions

    1.

    static time_is_dst_result
    local_is_dst(const date_type & d, const time_duration_type & td);

    Calculates if the given local time is dst or not. Determines if the time is really in DST or not. Also checks for invalid and ambiguous.

    2.

    static bool is_dst_boundary_day(date_type d);

    3.

    static time_duration_type dst_offset();
    The time of day for the dst transition (eg: typically 01:00:00 or 02:00:00) .RE

        4.

        static date_type local_dst_start_day(year_type year);

        5.

        static date_type local_dst_end_day(year_type year);