| Home | Libraries | People | FAQ | More

## Class template local_adjustor

boost::date_time::local_adjustor — Template that simplifies the creation of local time calculator.

## Synopsis

    // In header: <boost/date_time/local_time_adjustor.hpp>

    template<typename time_type, short utc_offset, typename dst_rule>
    class local_adjustor {
    public:
      // types
      typedef time_type::time_duration_type                                                                       time_duration_type;
      typedef time_type::date_type                                                                                date_type;
      typedef static_local_time_adjustor< time_type, dst_rule, utc_adjustment< time_duration_type, utc_offset > > dst_adjustor;

      // public static functions
      static time_type utc_to_local(const time_type &);
      static time_type
      local_to_utc(const time_type &, date_time::dst_flags = date_time::calculate);
    };

## Description

Use this template to create the timezone to utc convertors as required.

This class will also work for other regions that don't use dst and have a utc offset which is an integral number of hours.

Template Parameters -time_type – Time class to use -utc_offset – Number hours local time is adjust from utc -use_dst – true (default) if region uses dst, false otherwise For example:

       //eastern timezone is utc-5
    typedef date_time::local_adjustor<ptime, -5, us_dst> us_eastern;
    typedef date_time::local_adjustor<ptime, -6, us_dst> us_central;
    typedef date_time::local_adjustor<ptime, -7, us_dst> us_mountain;
    typedef date_time::local_adjustor<ptime, -8, us_dst> us_pacific;
    typedef date_time::local_adjustor<ptime, -7, no_dst> us_arizona;

### `local_adjustor` public static functions

1.     static time_type utc_to_local(const time_type & t);

   Convert a utc time to local time.

2.     static time_type
       local_to_utc(const time_type & t,
                    date_time::dst_flags dst = date_time::calculate);

   Convert a local time to utc.