Boost C++ Libraries

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Class template null_dst_rules

boost::date_time::null_dst_rules — Used for local time adjustments in places that don't use dst.

Synopsis

// 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() ;
};

Description

`null_dst_rules` public static functions

static 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 d) ;

static time_duration_type dst_offset() ;