Re: [boost] [chrono][stopwatches] Request for interest in NEW stopwatch/timer reporting facilities

Subject: Re: [boost] [chrono][stopwatches] Request for interest in NEW stopwatch/timer reporting facilities
From: Vicente J. Botet Escriba (vicente.botet_at_[hidden])
Date: 2011-09-15 14:52:38

Le 15/09/11 15:03, Steven Maitlall a écrit :
> I like the ideas you put forth here.
Thanks.
> Though, I wonder if it could be taken a few steps further ... A boost
> formatting library
>
>   81    typedef boost::format::context_adapter<
>   82       struct timeval,
>   83       boost::format::context_spec<
>   84          boost::format::context_element<'d', ...>
>   85>  >  timeval_context_t;
>   86
>   87    boost::format::basic_formatter<timeval_context_t>  fmt;
>   88
>   89    struct timeval tv;
>   90    gettimeofday(&tv, NULL);
>   91
>   92    // Standard usage
>   93    std::cout<<  fmt("%d:%d",tv.tv_sec, tv.tv_usec)<<  std::endl;
>   94
>   95    // Output the first, then the second context elements
>   96    std::cout<<  fmt("%{1}:%{2}",tv)<<  std::endl;
>
> I like where the idea is taking me and I'm working on the implementation
> details now
>
>
>
IUC what you want to achieve is to format a UDT using its parts. I think 
that seen the UDT as a tuple could help. What about using the {i,j} to 
refer to the j-th part of the i-th parameter? In this way you could mix 
several parameter with the same format.

std::cout<<  fmt("{1,1}:{1,2} = {2}") % tv % i;

I think I start to see how such a library could help to make easier the 
Stopwatch reporting. I would be greatfull if you could explain how this 
can be applied in my context.

Thanks,
Vicente