## Function template format_date_time

boost::log::expressions::format_date_time

## Synopsis

    // In header: <boost/log/expressions/formatters/date_time.hpp>

    template<typename T, typename FallbackPolicyT, typename TagT,
             template< typename > class ActorT, typename CharT>
      format_date_time_actor< T, FallbackPolicyT, CharT, ActorT >
      format_date_time(attribute_actor< T, FallbackPolicyT, TagT, ActorT > const & placeholder,
                       std::basic_string< CharT > const & format);

## Description

The function generates a manipulator node in a template expression. The manipulator must participate in a formatting expression (stream output or `format` placeholder filler).

Parameters: |
`format` | Format string
`placeholder` | Attribute placeholder