Re: [boost] [log] Questions for Andrey

From: Boris (boriss_at_[hidden])
Date: 2008-08-20 15:07:18

On Wed, 20 Aug 2008 20:36:47 +0200, Andrey Semashev  
<andrey.semashev_at_[hidden]> wrote:

> [...]
>> If I build it with VC++ 9.0 SP1 the file test.txt contains afterwards:
>>
>> [] message
>>
>> Only if I use boost::log::formatters::date_time("TimeStamp") the
>> timestamp is written.
>
> This is not a bug. The problem is that you used attr formatter without
> specifying date type. The attr formatter by default supports most
> fundamental types and strings. For other types the attribute value type
> (or set of types) must be specified explicitly:
>
>   boost::log::formatters::attr< boost::posix_time::ptime >("TimeStamp")
>
>
> As for the date_time formatter, it implicitly supports all date and time
> types defined in the library documentation, which includes ptime. That's
> why it worked right away.

Thanks for the explanation! I'm not sure if I had found out without your  
help. I don't know about others but maybe my questions here help to  
improve the (already pretty good) documentation. Or is this explained  
already somewhere that I just missed it?

Boris