Re: [boost] [chrono] New Features + Bug fixes + Updateddocumentation

Subject: Re: [boost] [chrono] New Features + Bug fixes + Updateddocumentation
From: vicente.botet (vicente.botet_at_[hidden])
Date: 2009-12-11 12:04:55

Hi,
----- Original Message ----- 
From: "Howard Hinnant" <howard.hinnant_at_[hidden]>
To: <boost_at_[hidden]>
Sent: Friday, December 11, 2009 5:20 PM
Subject: Re: [boost] [chrono] New Features + Bug fixes + Updateddocumentation

> 
> On Dec 11, 2009, at 3:37 AM, vicente.botet wrote:
> 
>> There is yet an error with gcc-4.4.0
>> 
>> ./boost/chrono/chrono.hpp:945: error: declaration of 'typedef class boost::chrono::duration<long long int, boost::ratio<1ll, 10000000ll> > boost::chrono::system_clock::duration'
>> ./boost/chrono/chrono.hpp:458: error: changes meaning of 'duration' from 'class boost::chrono::duration<long long int, boost::ratio<1ll, 10000000ll> >'
>> 
>> Note that the line numbers will be no more significant. It corresponds to the following
>> 
>> namespace chrono {
>> 
>>    template <class Rep, class Period>
>>    class duration
>>    {...}
>> 
>>  class BOOST_CHRONO_DECL system_clock
>>  {
>>  public:
>>      typedef BOOST_SYSTEM_CLOCK_DURATION          duration;
>>    ...
>>  };
>> }
>> 
>> where
>> 
>> #ifdef BOOST_CHRONO_WINDOWS_API
>> // The system_clock tick is 100 nanoseconds
>> # define BOOST_SYSTEM_CLOCK_DURATION duration<boost::int_least64_t, ratio<BOOST_INTMAX_C(1), BOOST_INTMAX_C(10000000)> >
>> #else
>> # define BOOST_SYSTEM_CLOCK_DURATION boost::chrono::nanoseconds
>> #endif
> 
> Try qualifying "duration" with "chrono::" in BOOST_SYSTEM_CLOCK_DURATION:
> 
> # define BOOST_SYSTEM_CLOCK_DURATION chrono::duration<boost::int_least64_t, ...

This could help if the warning was for windows API, but unfortunately it was reported be gcc-4.4.0 and also by  gcc-4.3.4 :(

Best,
Vicente