[Boost-users] Re: date time library question !!

From: Rene Rivera (grafik.list_at_[hidden])
Date: 2005-05-29 14:37:32

Jeff Garland wrote:
> On Sun, 29 May 2005 00:21:33 -0400, Saurabh Sood wrote
> 
>>Hi all,
>>
>>  i am totally new to boost but more i am feeling good and bad at 
>>same time ...  good coz boost is cross-platform and powerful .. 
>>however sometimes its hard to do simple things ...
>>
>>  Take following for instance ..
>>
> 
> -------------------------------------------------------------------------------------
> 
>>using namespace boost::posix_time;
>>ptime p =  = microsec_clock::local_time();
>>...
>>... (some calculations)
>>... 
>>time_duration td = microsec_clock::local_time() - p;
>>std::cout << std::string(" Total Milliseconds: ") 
>>              << td.total_milliseconds() 
>>              << std::endl;              // Works fine
>>
> 
> -------------------------------------------------------------------------------------
> 
>>But how can the value present in td.total_milliseconds()  could be 
>>put inside a std::string ? It might sound simple but i guess its 
>>tricky . ...
> 
> 
> How about 
>   #include <sstream>
>   //...
>   std::stringstream ss;
>   ss << td.total_milliseconds();
>   std::string s = ss.str();
> 
> After all, total_milliseconds just returns a numeric value.

Or possibly:

#include <boost/lexical_cast.hpp>
//...
std::string m =
   boost::lexical_cast<std::string>(td.total_milleseconds());

Amounts to the same code as Jeff's code. But depending on the context it 
might be more convenient.

Docs: http://www.boost.org/libs/conversion/lexical_cast.htm

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